/* ===== CSS Variables ===== */
:root {
  /* Colors */
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --primary-700: #4338ca;

  --success-500: #10b981;
  --success-600: #059669;
  --warning-500: #f59e0b;
  --warning-600: #d97706;
  --danger-500: #ef4444;
  --danger-600: #dc2626;

  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Dark Theme */
  --bg-primary: #0f0f17;
  --bg-secondary: #1a1a27;
  --bg-tertiary: #262640;
  --bg-accent: #2d2d4d;
  --bg-hover: rgba(255, 255, 255, 0.05);
  --bg-glass: rgba(255, 255, 255, 0.08);
  --bg-overlay: rgba(0, 0, 0, 0.8);

  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;

  --border-color: rgba(255, 255, 255, 0.1);
  --border-color-hover: rgba(255, 255, 255, 0.2);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --sidebar-width: 320px;
  --user-panel-width: 300px;
  --header-height: 80px;
  --mobile-bottom-padding: 20px;
}

/* ===== Reset & Base ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, var(--bg-primary) 0%, #0a0a14 100%);
  color: var(--text-primary);
  line-height: 1.6;
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
  position: fixed;
  width: 100%;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--bg-accent);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-600);
}

/* ===== Utility Classes ===== */
.hidden {
  display: none !important;
}

/* ===== Animations ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { 
    opacity: 0; 
    transform: translateY(20px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes recordingPulse {
  0%, 100% { 
    transform: scale(1);
    opacity: 1;
  }
  50% { 
    transform: scale(1.1);
    opacity: 0.8;
  }
}

@keyframes bounceIn {
  0% {
    transform: scale(0.3);
    opacity: 0;
  }
  50% {
    transform: scale(1.05);
    opacity: 1;
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ===== Components ===== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger-500) 0%, var(--danger-600) 100%);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--danger-600) 0%, #b91c1c 100%);
  transform: translateY(-1px);
}

.btn-warning {
  background: linear-gradient(135deg, var(--warning-500) 0%, var(--warning-600) 100%);
  color: white;
}

.btn-warning:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--warning-600) 0%, #b45309 100%);
  transform: translateY(-1px);
}

.btn-success {
  background: linear-gradient(135deg, var(--success-500) 0%, var(--success-600) 100%);
  color: white;
}

.btn-success:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--success-600) 0%, #047857 100%);
  transform: translateY(-1px);
}

.btn-icon {
  padding: var(--space-2);
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.btn-icon:hover:not(:disabled) {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-color-hover);
}

.btn-small {
  padding: var(--space-2) var(--space-3);
  font-size: 0.75rem;
}

.btn-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  padding: var(--space-2);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-close:hover {
  background: var(--danger-500);
  color: white;
  border-color: var(--danger-500);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  padding: var(--space-2);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-right: var(--space-4);
}

.mobile-menu-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-color-hover);
}

/* Form Elements */
.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

/* Field Notes */
.field-note {
  display: block;
  margin-top: var(--space-1);
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
}

.toggle-switch input[type="checkbox"] {
  opacity: 0;
  position: absolute;
  width: 0;
  height: 0;
}

.switch {
  display: block;
  width: 48px;
  height: 24px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  position: relative;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.toggle-switch input:checked + .switch {
  background: var(--primary-500);
  border-color: var(--primary-500);
}

.toggle-switch input:checked + .switch::after {
  left: 26px;
  background: white;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 var(--space-2);
  background: var(--danger-500);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-left: var(--space-2);
}

.role-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  background: var(--primary-500);
  color: white;
}

.role-badge.admin {
  background: var(--danger-500);
}

.role-badge.owner {
  background: var(--success-500);
}

.role-badge.developer {
  background: var(--warning-500);
  color: var(--gray-900);
}

.tier-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  box-shadow: var(--shadow-md);
}

.version-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* ===== About Sub-tabs ===== */
.about-sub-tabs {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--space-1);
  margin-bottom: var(--space-6);
  border: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: var(--space-1);
}

.about-sub-tab-btn {
  flex: 1;
  min-width: 100px;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.about-sub-tab-btn.active,
.about-sub-tab-btn:hover {
  background: var(--primary-500);
  color: white;
  box-shadow: var(--shadow-md);
}

.about-sub-content {
  animation: fadeIn var(--transition-fast);
}

.about-sub-tab-content {
  display: none;
  animation: fadeIn var(--transition-fast);
}

.about-sub-tab-content.active {
  display: block;
}

/* ===== Updates Section Styles ===== */
.updates-block {
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(16, 185, 129, 0.05) 100%);
  border-left-color: var(--success-500);
}

.updates-block h5 {
  color: var(--success-500);
}

.update-log-content {
  max-height: 600px;
  overflow-y: auto;
  padding-right: var(--space-2);
}

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
  text-align: center;
  color: var(--text-muted);
}

.loading-state .loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--bg-tertiary);
  border-top: 3px solid var(--primary-500);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
  margin-bottom: var(--space-4);
}

.loading-state p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.update-entry {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--success-500);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  transition: all var(--transition-fast);
  animation: slideUp var(--transition-normal);
}

.update-entry:last-child {
  margin-bottom: 0;
}

.update-entry:hover {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.update-entry.latest {
  border-left-color: var(--primary-500);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(99, 102, 241, 0.05) 100%);
}

.update-entry.latest::before {
  content: 'Latest';
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--primary-500);
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
}

.update-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--border-color);
}

.update-version {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.update-version h6 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.update-version-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: var(--success-500);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.update-date {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.update-date::before {
  content: '📅';
  font-size: 0.875rem;
}

.update-content {
  margin-bottom: var(--space-4);
}

.update-section {
  margin-bottom: var(--space-4);
}

.update-section:last-child {
  margin-bottom: 0;
}

.update-section-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.update-section-title.new-features::before {
  content: '✨';
}

.update-section-title.improvements::before {
  content: '🔧';
}

.update-section-title.bug-fixes::before {
  content: '🐛';
}

.update-section-title.changes::before {
  content: '🔄';
}

.update-section-title.security::before {
  content: '🔒';
}

.update-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.update-list li {
  display: flex;
  align-items: flex-start;
  padding: var(--space-3);
  color: var(--text-secondary);
  line-height: 1.7;
  background: var(--bg-tertiary);
  border-left: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-2);
  transition: all var(--transition-fast);
}

.update-list li:last-child {
  margin-bottom: 0;
}

.update-list li:hover {
  background: var(--bg-accent);
  border-left-color: var(--success-500);
  transform: translateX(4px);
  color: var(--text-primary);
}

.update-list li::before {
  content: '→';
  color: var(--success-500);
  font-weight: bold;
  margin-right: var(--space-3);
  flex-shrink: 0;
  margin-top: var(--space-1);
}

.update-notes {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid var(--primary-500);
  border-left-width: 3px;
  border-radius: var(--radius-md);
}

.update-notes-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.update-notes-title::before {
  content: 'ℹ️';
}

.update-notes p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.no-updates-message {
  text-align: center;
  padding: var(--space-12);
  color: var(--text-muted);
}

.no-updates-message svg {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.no-updates-message h6 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.no-updates-message p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ===== Terms Agreement ===== */
.terms-agreement {
  margin: var(--space-6) 0;
  padding: var(--space-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.terms-checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.terms-checkbox-label input[type="checkbox"] {
  margin-top: var(--space-1);
  width: 18px;
  height: 18px;
  cursor: pointer;
  flex-shrink: 0;
}

.terms-checkbox-label a {
  color: #007bff !important;
  text-decoration: underline !important;
  cursor: pointer !important;
  font-weight: 600 !important;
  transition: color 0.2s ease;
}

.terms-checkbox-label a:hover {
  color: #0056b3 !important;
}

/* ===== Security Notice ===== */
.security-notice {
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(99, 102, 241, 0.05) 100%);
  border: 1px solid var(--primary-500);
  border-left: 4px solid var(--primary-500);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}

.security-notice h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-500);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.security-notice p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* ===== Login Info Notice ===== */
.login-info-notice {
  margin-bottom: var(--space-6);
  background: var(--bg-tertiary);
  border: 1px solid var(--primary-500);
  border-left: 4px solid var(--primary-500);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.info-notice {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.info-notice svg {
  color: var(--primary-500);
  flex-shrink: 0;
  margin-top: var(--space-1);
}

.notice-text strong {
  color: var(--primary-500);
  font-weight: 600;
  display: block;
  margin-bottom: var(--space-2);
}

.notice-text p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 0;
}

/* ===== Registration Modal Updates ===== */
.registration-modal {
  max-width: 600px;
  max-height: 90vh;
  max-height: 90dvh;
  overflow-y: auto;
}

/* Registration Steps Indicator */
.registration-steps {
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  opacity: 0.5;
  transition: all var(--transition-fast);
}

.step.active {
  opacity: 1;
}

.step-number {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 700;
  transition: all var(--transition-fast);
}

.step.active .step-number {
  background: var(--primary-500);
  border-color: var(--primary-500);
  color: white;
}

.step span {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  text-align: center;
}

.step.active span {
  color: var(--text-primary);
}

.step-arrow {
  color: var(--text-muted);
  font-size: 1.25rem;
  margin: 0 var(--space-2);
}

.registration-step {
  display: none;
}

.registration-step:not(.hidden) {
  display: block;
  animation: slideUp var(--transition-normal);
}

/* ===== Payment Information Section ===== */
.payment-info-section {
  margin-top: var(--space-6);
  animation: slideUp var(--transition-normal);
}

.payment-header {
  text-align: center;
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.payment-header h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.payment-header p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Bank Account Information */
.bank-account-info {
  margin-bottom: var(--space-6);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.bank-account-info h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.bank-account-info h4::before {
  content: '🏦';
  font-size: 1.25rem;
}

.bank-details {
  display: grid;
  gap: var(--space-3);
}

.bank-field {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.bank-field label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.bank-value {
  font-size: 0.875rem;
  color: var(--text-primary);
  font-weight: 600;
  font-family: 'Courier New', monospace;
  background: var(--bg-accent);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

/* Tier Selection */
.tier-selection {
  margin-bottom: var(--space-6);
}

.tier-selection h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  text-align: center;
}

.tier-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
}

.tier-option {
  background: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.tier-option:hover {
  border-color: var(--primary-500);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.tier-option.popular {
  border-color: var(--primary-500);
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(99, 102, 241, 0.1) 100%);
}

.tier-option.premium {
  border-color: var(--warning-500);
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(245, 158, 11, 0.1) 100%);
}

.tier-option .tier-badge {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: var(--primary-500);
  color: white;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tier-option.premium .tier-badge {
  background: var(--warning-500);
  color: var(--gray-900);
}

.tier-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-4);
}

.tier-header h5 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.tier-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-500);
  font-family: 'Courier New', monospace;
}

.tier-option.premium .tier-price {
  color: var(--warning-500);
}

.tier-option ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tier-option li {
  display: flex;
  align-items: center;
  padding: var(--space-2) 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border-color);
}

.tier-option li:last-child {
  border-bottom: none;
}

.tier-option li:before {
  content: '✓';
  color: var(--success-500);
  font-weight: bold;
  margin-right: var(--space-3);
  font-size: 1rem;
}

/* Payment Instructions */
.payment-instructions {
  margin-bottom: var(--space-6);
}

.critical-warning {
  background: rgba(239, 68, 68, 0.1);
  border: 2px solid var(--danger-500);
  border-left: 6px solid var(--danger-500);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.critical-warning svg {
  color: var(--danger-500);
  flex-shrink: 0;
  margin-top: var(--space-1);
}

.warning-text strong {
  color: var(--danger-500);
  font-weight: 700;
  display: block;
  margin-bottom: var(--space-2);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.warning-text p {
  color: var(--text-primary);
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 0;
}

.payment-steps {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}

.payment-steps h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.payment-steps h4::before {
  content: '📝';
  font-size: 1.25rem;
}

.payment-steps ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: step-counter;
}

.payment-steps li {
  counter-increment: step-counter;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  line-height: 1.6;
}

.payment-steps li:last-child {
  border-bottom: none;
}

.payment-steps li::before {
  content: counter(step-counter);
  background: var(--primary-500);
  color: white;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: var(--space-1);
}

.payment-steps strong {
  color: var(--text-primary);
  font-weight: 600;
}

.payment-footer {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.payment-footer p {
  margin: 0;
  margin-bottom: var(--space-2);
}

.payment-footer p:last-child {
  margin-bottom: 0;
}

.payment-footer strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Payment Actions */
.payment-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

/* ===== Subscription Info Styles ===== */
.subscription-info {
  margin-bottom: var(--space-6);
  background: var(--bg-tertiary);
  border: 1px solid var(--warning-500);
  border-left: 4px solid var(--warning-500);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.subscription-notice {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.subscription-notice svg {
  color: var(--warning-500);
  flex-shrink: 0;
  margin-top: var(--space-1);
}

.subscription-text strong {
  color: var(--warning-500);
  font-weight: 600;
  display: block;
  margin-bottom: var(--space-2);
}

.subscription-text p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 0;
}

/* ===== Process Steps Styles ===== */
.subscription-process-block {
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-accent) 100%);
  border: 1px solid var(--primary-500);
  border-left: 4px solid var(--primary-500);
}

.process-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.process-step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.process-step::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary-500), var(--primary-600));
}

.process-step:hover {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.step-content {
  flex: 1;
  min-width: 0;
}

.step-content h6 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.step-content p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ===== Mobile User Header ===== */
.mobile-user-header {
  display: none;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-left: var(--space-3);
  flex: 1;
  max-width: 300px;
}

.mobile-user-header:hover {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
  transform: translateY(-1px);
}

.mobile-header-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.mobile-header-info {
  flex: 1;
  min-width: 0;
}

.mobile-header-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mobile-header-status {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.2;
}

.mobile-header-chevron {
  color: var(--text-secondary);
  flex-shrink: 0;
}

.desktop-chat-title {
  display: block;
}

/* ===== Mobile User Info Modal ===== */
.mobile-user-modal {
  max-width: 400px;
}

.mobile-user-profile {
  text-align: center;
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
}

.mobile-user-avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: white;
  margin: 0 auto var(--space-4);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.mobile-user-avatar::after {
  content: '';
  position: absolute;
  inset: -4px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-radius: var(--radius-full);
  z-index: -1;
  opacity: 0.3;
  animation: pulse 2s infinite;
}

.mobile-user-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.mobile-user-details {
  margin-bottom: var(--space-6);
}

.mobile-user-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* ===== Voice Recording Modal ===== */
.voice-recording-modal {
  max-width: 450px;
  min-height: 400px;
}

.voice-recording-interface {
  text-align: center;
  padding: var(--space-4);
}

.recording-visualizer {
  margin-bottom: var(--space-8);
}

.recording-icon {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-4);
  background: var(--bg-tertiary);
  border: 3px solid var(--border-color);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.recording-icon.recording {
  background: var(--danger-500);
  border-color: var(--danger-500);
  color: white;
  animation: recordingPulse 1.5s infinite;
  box-shadow: 0 0 30px rgba(239, 68, 68, 0.4);
}

.recording-icon.recording::after {
  content: '';
  position: absolute;
  inset: -10px;
  border: 2px solid var(--danger-500);
  border-radius: var(--radius-full);
  opacity: 0.3;
  animation: pulse 2s infinite;
}

.recording-status {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.recording-timer {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-500);
  font-family: 'Courier New', monospace;
  letter-spacing: 0.1em;
}

.recording-timer.recording {
  color: var(--danger-500);
}

.recording-controls {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.recording-btn {
  min-width: 140px;
  position: relative;
}

.recording-btn.recording {
  background: var(--danger-500);
  border-color: var(--danger-500);
  animation: recordingPulse 1.5s infinite;
}

.recording-btn.recording:hover {
  background: var(--danger-600);
}

.recording-info {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.recording-info p {
  margin: 0;
  margin-bottom: var(--space-2);
}

.recording-info p:last-child {
  margin-bottom: 0;
}

/* ===== Mobile Navigation Overlay ===== */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1001;
  animation: fadeIn var(--transition-fast);
}

.mobile-nav-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(8px);
}

.mobile-nav-content {
  position: absolute;
  top: 0;
  left: 0;
  width: min(350px, 85vw);
  height: 100vh;
  height: 100dvh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  animation: slideInLeft var(--transition-normal);
  box-shadow: var(--shadow-xl);
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
}

.mobile-nav-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.mobile-nav-close {
  padding: var(--space-2);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mobile-nav-close:hover {
  background: var(--danger-500);
  color: white;
  border-color: var(--danger-500);
}

.mobile-friends-section {
  padding: var(--space-4);
}

/* Mobile Friend Requests */
.mobile-friend-requests-section {
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  overflow: hidden;
}

.mobile-subsection-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  border-bottom: 1px solid var(--border-color);
}

.mobile-subsection-header:hover {
  background: var(--bg-hover);
}

.mobile-subsection-title {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.mobile-friend-requests-list {
  padding: var(--space-4);
  max-height: 200px;
  overflow-y: auto;
}

/* Mobile Friends List */
.mobile-friends-list-container {
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.mobile-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-glass);
}

.mobile-section-header h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.mobile-friends-list {
  padding: var(--space-4);
  max-height: 60vh;
  max-height: 60dvh;
  overflow-y: auto;
}

/* ===== Upload Menu Dropdown ===== */
.upload-dropdown {
  position: relative;
}

.upload-menu {
  position: absolute;
  bottom: 100%;
  left: 0;
  margin-bottom: var(--space-2);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(20px);
  z-index: 100;
  min-width: 160px;
  animation: bounceIn var(--transition-normal);
}

.upload-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.upload-option:hover {
  background: var(--bg-accent);
  color: var(--primary-500);
  transform: translateX(4px);
}

.upload-option svg {
  flex-shrink: 0;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.upload-option:hover svg {
  color: var(--primary-500);
}

/* ===== Usage Tracking Section ===== */
.usage-tracking-section {
  margin-bottom: var(--space-6);
}

.usage-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.usage-stat-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.usage-stat-card:hover {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.usage-stat-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.usage-stat-icon {
  font-size: 1.25rem;
}

.usage-stat-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.usage-stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.usage-stat-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.usage-progress {
  width: 100%;
  height: 4px;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.usage-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--primary-600));
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

/* Usage Status Colors */
.usage-stat-card.usage-normal .usage-progress-bar {
  background: linear-gradient(90deg, var(--success-500), var(--success-600));
}

.usage-stat-card.usage-warning .usage-progress-bar {
  background: linear-gradient(90deg, var(--warning-500), var(--warning-600));
}

.usage-stat-card.usage-warning .usage-stat-value {
  color: var(--warning-500);
}

.usage-stat-card.usage-critical .usage-progress-bar {
  background: linear-gradient(90deg, var(--danger-500), var(--danger-600));
}

.usage-stat-card.usage-critical .usage-stat-value {
  color: var(--danger-500);
}

/* ===== Tier Info Blocks ===== */
.tier-info-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.tier-info-block {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.tier-info-block:hover {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.tier-info-block::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-500), var(--primary-600));
}

.tier-info-block h6 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--primary-500);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.tier-info-block ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tier-info-block li {
  display: flex;
  align-items: center;
  padding: var(--space-2) 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.tier-info-block li:last-child {
  border-bottom: none;
}

.tier-info-block li:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
}

.tier-info-block li:before {
  content: '💎';
  margin-right: var(--space-3);
  font-size: 0.875rem;
}

.tier-note {
  margin-top: var(--space-4);
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-left: 3px solid var(--primary-500);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ===== About Section Enhanced Styles ===== */
.tier-pricing-block {
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(99, 102, 241, 0.05) 100%);
  border-left-color: var(--primary-500);
}

.features-block {
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(16, 185, 129, 0.05) 100%);
  border-left-color: var(--success-500);
}

.features-block h5 {
  color: var(--success-500);
}

.features-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.features-list li {
  display: flex;
  align-items: flex-start;
  padding: var(--space-3) 0;
  color: var(--text-secondary);
  line-height: 1.7;
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.features-list li:last-child {
  border-bottom: none;
}

.features-list li:hover {
  color: var(--text-primary);
  padding-left: var(--space-2);
}

.features-list li:before {
  content: '✓';
  color: var(--success-500);
  font-weight: bold;
  margin-right: var(--space-3);
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: var(--space-1);
}

.security-block {
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(99, 102, 241, 0.08) 100%);
  border: 2px solid var(--primary-500);
  border-left-width: 4px;
}

.security-block h5 {
  color: var(--primary-500);
  font-size: 1.25rem;
}

.security-intro {
  font-size: 0.9375rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-left: 3px solid var(--primary-500);
  border-radius: var(--radius-md);
}

.security-features {
  display: grid;
  gap: var(--space-5);
}

.security-feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.security-feature-item:hover {
  background: var(--bg-accent);
  border-color: var(--primary-500);
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.security-feature-item.warning-item {
  border-color: var(--warning-500);
  background: rgba(245, 158, 11, 0.05);
}

.security-feature-item.warning-item:hover {
  border-color: var(--warning-500);
  background: rgba(245, 158, 11, 0.08);
}

.security-icon {
  font-size: 2rem;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.security-feature-item:hover .security-icon {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
}

.security-details {
  flex: 1;
  min-width: 0;
}

.security-details h6 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.security-details p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.security-details strong {
  color: var(--primary-500);
  font-weight: 600;
}

.security-feature-item.warning-item .security-details strong {
  color: var(--warning-500);
}

.moderation-block {
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(99, 102, 241, 0.05) 100%);
  border-left-color: var(--primary-500);
}

.moderation-block h5 {
  color: var(--primary-500);
}

.policy-list {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0;
}

.policy-list li {
  display: flex;
  align-items: flex-start;
  padding: var(--space-3);
  color: var(--text-secondary);
  line-height: 1.7;
  background: var(--bg-secondary);
  border-left: 3px solid var(--primary-500);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
  transition: all var(--transition-fast);
}

.policy-list li:hover {
  background: var(--bg-accent);
  transform: translateX(4px);
}

.policy-list li:before {
  content: '•';
  color: var(--primary-500);
  font-weight: bold;
  margin-right: var(--space-3);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.enforcement-block {
  border-color: var(--warning-500);
  border-left-width: 4px;
}

.enforcement-block h5 {
  color: var(--warning-500);
}

.enforcement-list {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0;
}

.enforcement-list li {
  display: flex;
  align-items: flex-start;
  padding: var(--space-3);
  color: var(--text-secondary);
  line-height: 1.7;
  background: rgba(245, 158, 11, 0.05);
  border-left: 3px solid var(--warning-500);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
  transition: all var(--transition-fast);
}

.enforcement-list li:hover {
  background: rgba(245, 158, 11, 0.1);
  transform: translateX(4px);
}

.enforcement-list li:before {
  content: '⚠';
  color: var(--warning-500);
  font-weight: bold;
  margin-right: var(--space-3);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.enforcement-note {
  margin-top: var(--space-4);
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-left: 3px solid var(--warning-500);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.legal-block {
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(107, 114, 128, 0.1) 100%);
  border: 2px solid var(--gray-500);
  border-left-width: 4px;
  padding: var(--space-6);
}

.legal-block h5 {
  color: var(--gray-400);
  font-size: 1.125rem;
  margin-bottom: var(--space-5);
}

.legal-block > p {
  font-size: 0.9375rem;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-left: 3px solid var(--gray-500);
  border-radius: var(--radius-sm);
}

.legal-subsection {
  margin-bottom: var(--space-6);
  padding: var(--space-5);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.legal-subsection:last-of-type {
  margin-bottom: var(--space-5);
}

.legal-subsection h6 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--border-color);
}

.legal-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.legal-list li {
  display: flex;
  align-items: flex-start;
  padding: var(--space-3);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-2);
  background: var(--bg-tertiary);
  border-left: 2px solid var(--gray-600);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.legal-list li:hover {
  background: var(--bg-accent);
  border-left-color: var(--gray-400);
  transform: translateX(2px);
}

.legal-list li:before {
  content: '→';
  color: var(--gray-500);
  font-weight: bold;
  margin-right: var(--space-3);
  flex-shrink: 0;
}

.legal-disclaimer {
  margin-top: var(--space-5);
  padding: var(--space-5);
  background: rgba(239, 68, 68, 0.05);
  border: 2px solid var(--danger-500);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  color: var(--text-primary);
  line-height: 1.7;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.legal-acceptance {
  margin-top: var(--space-5);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border: 2px solid var(--primary-500);
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  color: var(--text-primary);
  text-align: center;
  line-height: 1.7;
}

.contact-block {
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(99, 102, 241, 0.05) 100%);
  border-left-color: var(--primary-500);
}

.contact-block h5 {
  color: var(--primary-500);
}

/* ===== Layout ===== */

/* Auto-login Indicator */
.auto-login-indicator {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.login-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(20px);
  animation: slideUp var(--transition-normal);
}

.pulse-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.pulse-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  border-radius: var(--radius-lg);
  position: relative;
  animation: pulse 2s infinite;
}

.pulse-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  background: white;
  border-radius: var(--radius-sm);
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--bg-tertiary);
  border-top: 3px solid var(--primary-500);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
  margin: var(--space-4) auto 0;
}

/* Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn var(--transition-fast);
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(8px);
}

.modal-content {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  max-height: 90dvh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(20px);
  animation: slideUp var(--transition-normal);
}

.auth-modal {
  max-width: 400px;
}

.settings-modal-content {
  max-width: 700px;
  width: 95%;
  min-height: 600px;
}

.modal-header {
  margin-bottom: var(--space-6);
}

.modal-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.modal-footer {
  margin-top: var(--space-6);
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
}

.auth-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.auth-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.auth-form {
  margin-bottom: var(--space-6);
}

.auth-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* Settings Specific Styles */
.settings-tabs {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--space-1);
  margin-bottom: var(--space-6);
  border: 1px solid var(--border-color);
}

.settings-tab-btn {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.settings-tab-btn.active,
.settings-tab-btn:hover {
  background: var(--primary-500);
  color: white;
  box-shadow: var(--shadow-md);
}

.settings-content {
  min-height: 400px;
}

.settings-tab-content {
  display: none;
  animation: fadeIn var(--transition-fast);
}

.settings-tab-content.active {
  display: block;
}

.settings-section-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Profile Tab Styles */
.profile-info-section {
  margin-bottom: var(--space-6);
}

.profile-info-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
}

.profile-info-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border-color);
}

.profile-info-item:last-child {
  border-bottom: none;
}

.profile-info-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.profile-info-value {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
}

.tier-benefits {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.tier-benefits-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.tier-benefits-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  background: var(--bg-hover);
  font-size: 0.875rem;
  color: var(--text-primary);
}

.benefit-item.available {
  color: var(--success-500);
}

.benefit-item.unavailable {
  color: var(--text-muted);
  opacity: 0.6;
}

/* Settings/Preferences Tab Styles */
.settings-section {
  margin-bottom: var(--space-6);
}

/* About Tab Styles */
.about-section {
  margin-bottom: var(--space-6);
}

.about-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.about-header {
  padding: var(--space-5);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-glass);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.about-header .pulse-logo {
  margin-bottom: 0;
}

.about-header h4 {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.about-content {
  padding: var(--space-5);
}

.about-section-block {
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left-width: 4px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.about-section-block:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(2px);
}

.about-section-block:last-child {
  margin-bottom: 0;
}

.about-section-block h5 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.about-section-block h5 svg {
  flex-shrink: 0;
}

.about-section-block p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-3);
}

.about-section-block p:last-child {
  margin-bottom: 0;
}

.about-section-block ul {
  list-style: none;
  padding: 0;
  margin-left: var(--space-4);
}

.about-section-block li {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-2);
  position: relative;
  padding-left: var(--space-4);
}

.about-section-block li:before {
  content: '•';
  color: var(--primary-500);
  font-weight: bold;
  position: absolute;
  left: 0;
}

.warning-block {
  border-color: var(--warning-500);
  border-left-width: 4px;
  background: rgba(245, 158, 11, 0.05);
}

.warning-block h5 {
  color: var(--warning-500);
}

.about-section-block strong {
  color: var(--text-primary);
  font-weight: 600;
}

.about-section-block em {
  color: var(--text-muted);
  font-style: italic;
}

/* Tab Navigation */
.tab-navigation {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--space-1);
  margin-bottom: var(--space-6);
}

.tab-btn {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn.active,
.tab-btn:hover {
  background: var(--primary-500);
  color: white;
}

.tab-content-container {
  animation: fadeIn var(--transition-fast);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn var(--transition-fast);
}

/* Settings */
.setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.setting-info label {
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
  display: block;
}

.setting-info p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.4;
}

/* Main Application */
.app-container {
  display: flex;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  position: relative;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.friends-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.section-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
}

.section-header h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Friend Requests */
.friend-requests-section {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-tertiary);
}

.subsection-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.subsection-header:hover {
  background: var(--bg-hover);
}

.subsection-title {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.toggle-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.toggle-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.friend-requests-list {
  margin-top: var(--space-3);
  max-height: 200px;
  overflow-y: auto;
}

.friend-request-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary-500);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-3);
  animation: slideUp var(--transition-fast);
}

.friend-request-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
}

.friend-request-username {
  font-weight: 600;
  color: var(--primary-500);
}

.friend-request-buttons {
  display: flex;
  gap: var(--space-2);
}

.friend-request-btn {
  padding: var(--space-1) var(--space-3);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.accept-btn {
  background: var(--success-500);
  color: white;
}

.accept-btn:hover {
  background: var(--success-600);
  transform: translateY(-1px);
}

.deny-btn {
  background: var(--danger-500);
  color: white;
}

.deny-btn:hover {
  background: var(--danger-600);
  transform: translateY(-1px);
}

/* Friends List */
.friends-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4) var(--space-6);
}

.friend-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  margin-bottom: var(--space-2);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.friend-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left var(--transition-normal);
}

.friend-item:hover::before {
  left: 100%;
}

.friend-item:hover {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
  transform: translateX(4px);
}

.friend-item.active {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-color: var(--primary-500);
  color: white;
}

.friend-item-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.friend-username {
  font-weight: 600;
  color: var(--text-primary);
}

.friend-item.active .friend-username {
  color: white;
}

.friend-role {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.friend-item.active .friend-role {
  color: rgba(255, 255, 255, 0.8);
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* Header */
.app-header {
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  backdrop-filter: blur(10px);
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  flex: 1;
}

.header-left h1 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.username {
  font-weight: 600;
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Chat Container */
.chat-container {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

/* Messages Area */
.messages-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-height: 0;
}

/* Messages */
.message {
  display: flex;
  flex-direction: column;
  max-width: 70%;
  position: relative;
  animation: slideUp var(--transition-fast);
}

.message.own {
  align-self: flex-end;
}

.message-header {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.message-content {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  word-wrap: break-word;
  position: relative;
  transition: all var(--transition-fast);
}

.message.own .message-content {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  border-color: var(--primary-500);
}

.message:hover .message-content {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.message:hover .message-actions {
  opacity: 1;
}

.message-actions {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  opacity: 0;
  transition: opacity var(--transition-fast);
  display: flex;
  gap: var(--space-1);
}

.message-action-btn {
  padding: var(--space-1);
  background: rgba(0, 0, 0, 0.8);
  border: none;
  color: white;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.75rem;
  transition: all var(--transition-fast);
}

.message-action-btn:hover {
  background: rgba(0, 0, 0, 0.9);
  transform: scale(1.1);
}

.delete-btn {
  background: var(--danger-500);
}

.delete-btn:hover {
  background: var(--danger-600);
}

/* Media Messages */
.message img,
.message video {
  max-width: 300px;
  max-height: 200px;
  border-radius: var(--radius-md);
  margin-top: var(--space-2);
  border: 1px solid var(--border-color);
}

/* Audio Messages */
.audio-message {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  max-width: 300px;
  margin-top: var(--space-2);
}

.message.own .audio-message {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-color: var(--primary-500);
}

.audio-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 1;
}

.audio-play-btn {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-full);
  background: var(--bg-accent);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.message.own .audio-play-btn {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.audio-play-btn:hover {
  background: var(--primary-500);
  color: white;
  transform: scale(1.1);
}

.message.own .audio-play-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

.audio-play-btn.playing {
  background: var(--success-500);
  color: white;
}

.audio-duration {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'Courier New', monospace;
  min-width: 35px;
}

.message.own .audio-duration {
  color: rgba(255, 255, 255, 0.8);
}

.audio-waveform {
  flex: 1;
  height: 30px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}

.message.own .audio-waveform {
  background: rgba(255, 255, 255, 0.1);
}

.audio-progress {
  height: 100%;
  background: var(--primary-500);
  border-radius: var(--radius-sm);
  transition: width var(--transition-fast);
  width: 0%;
}

.message.own .audio-progress {
  background: rgba(255, 255, 255, 0.3);
}

/* Document Messages */
.document-message {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  max-width: 300px;
  margin-top: var(--space-2);
}

.message.own .document-message {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-color: var(--primary-500);
  color: white;
}

.document-icon {
  width: 40px;
  height: 40px;
  background: var(--bg-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.message.own .document-icon {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.document-info {
  flex: 1;
  min-width: 0;
}

.document-name {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.message.own .document-name {
  color: white;
}

.document-size {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.message.own .document-size {
  color: rgba(255, 255, 255, 0.8);
}

.document-download {
  padding: var(--space-2);
  background: var(--bg-accent);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.message.own .document-download {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.document-download:hover {
  background: var(--primary-500);
  color: white;
  transform: scale(1.1);
}

.message.own .document-download:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Message Input */
.message-input-area {
  padding: var(--space-6);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
}

.input-container {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-3);
  transition: all var(--transition-fast);
}

.input-container:focus-within {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.upload-btn {
  flex-shrink: 0;
}

.message-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 0.875rem;
  resize: none;
  max-height: 120px;
  line-height: 1.5;
}

.message-input:focus {
  outline: none;
}

.message-input::placeholder {
  color: var(--text-muted);
}

.send-btn {
  flex-shrink: 0;
  border-radius: var(--radius-full);
  padding: var(--space-3);
}

/* Character Counter */
.character-counter {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--space-2);
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.character-counter.warning {
  color: var(--warning-500);
}

.character-counter.danger {
  color: var(--danger-500);
}

/* User Info Panel */
.user-info-panel {
  width: var(--user-panel-width);
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.user-profile {
  padding: var(--space-6);
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-glass);
}

.user-avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: white;
  margin: 0 auto var(--space-4);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.user-avatar::after {
  content: '';
  position: absolute;
  inset: -4px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-radius: var(--radius-full);
  z-index: -1;
  opacity: 0.3;
  animation: pulse 2s infinite;
}

.user-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.user-details {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.detail-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

.detail-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.detail-value {
  font-weight: 500;
  color: var(--text-primary);
}

.user-actions {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.admin-actions {
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-6);
  margin-top: var(--space-6);
}

.admin-section-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
  text-align: center;
}

.admin-action-group {
  margin-bottom: var(--space-4);
}

.admin-action-group label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

/* User List */
.user-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.blocked-user-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--danger-500);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  animation: slideUp var(--transition-fast);
}

.blocked-username {
  font-weight: 600;
  color: var(--danger-500);
}

.unblock-btn {
  background: var(--success-500);
  color: white;
  border: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.unblock-btn:hover {
  background: var(--success-600);
  transform: translateY(-1px);
}

/* Empty States */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-12);
  color: var(--text-muted);
}

.empty-state svg {
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--text-secondary);
}

.empty-state p {
  font-size: 0.875rem;
  line-height: 1.6;
}

/* Loading Indicator */
.loading-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  color: var(--text-secondary);
}

/* Message Display */
.message-display {
  margin-top: var(--space-4);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  text-align: center;
  animation: slideUp var(--transition-fast);
}

.message-display:empty {
  display: none;
}

.message-display.error-message {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--danger-500);
  color: var(--danger-500);
}

.message-display.success-message {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--success-500);
  color: var(--success-500);
}

/* Notifications */
.notification-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 400px;
}

.notification {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(20px);
  animation: slideUp var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.notification::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-500);
}

.notification.success::before {
  background: var(--success-500);
}

.notification.error::before {
  background: var(--danger-500);
}

.notification.warning::before {
  background: var(--warning-500);
}

/* Collapsed State */
.collapsed {
  display: none !important;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 280px;
    --user-panel-width: 280px;
  }
  
  .settings-modal-content {
    max-width: 600px;
    min-height: 550px;
  }
  
  .usage-stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }
  
  .tier-info-blocks {
    grid-template-columns: 1fr;
  }
  
  .process-steps {
    gap: var(--space-3);
  }
  
  .tier-options {
    grid-template-columns: 1fr;
  }
  
  .registration-modal {
    max-width: 500px;
  }
  
  .about-sub-tabs {
    gap: var(--space-1);
  }
  
  .about-sub-tab-btn {
    min-width: 80px;
    font-size: 0.75rem;
    padding: var(--space-2);
  }
}

@media (max-width: 768px) {
  /* Show mobile menu button */
  .mobile-menu-btn {
    display: flex !important;
  }
  
  /* Show mobile user header when friend is selected */
  .mobile-user-header {
    display: flex !important;
  }
  
  /* Hide desktop chat title on mobile */
  .desktop-chat-title {
    display: none !important;
  }
  
  /* Hide desktop sidebar */
  .sidebar {
    display: none;
  }
  
  /* Hide desktop user info panel */
  .user-info-panel {
    display: none !important;
  }
  
  /* Main Content Full Width Mobile */
  .main-content {
    width: 100%;
    height: 100vh;
    height: 100dvh;
  }
  
  /* Mobile App Container */
  .app-container {
    height: 100vh;
    height: 100dvh;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
  }
  
  /* Mobile Header */
  .app-header {
    height: var(--header-height);
    flex-shrink: 0;
  }
  
  .header-left h1 {
    font-size: 1.125rem;
  }
  
  .header-right {
    gap: var(--space-2);
  }
  
  .header-actions {
    gap: var(--space-1);
  }
  
  /* Mobile Chat Container */
  .chat-container {
    flex: 1;
    min-height: 0;
    height: calc(100vh - var(--header-height));
    height: calc(100dvh - var(--header-height));
  }
  
  /* Mobile Messages Area */
  .messages-area {
    height: 100%;
    display: flex;
    flex-direction: column;
  }
  
  /* Mobile Messages Container */
  .messages-container {
    flex: 1;
    min-height: 0;
    padding: var(--space-4);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  /* Mobile Message Input Area */
  .message-input-area {
    padding: var(--space-3) var(--space-4);
    padding-bottom: calc(var(--mobile-bottom-padding) + env(safe-area-inset-bottom, 0px));
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
  }
  
  .input-container {
    padding: var(--space-2);
  }
  
  .message-input {
    font-size: 16px; /* Prevent zoom on iOS */
  }
  
  .message {
    max-width: 85%;
  }
  
  /* Mobile Upload Menu */
  .upload-menu {
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: var(--space-3);
  }
  
  /* Mobile Voice Recording Modal */
  .voice-recording-modal {
    margin: var(--space-4);
    width: auto;
    max-width: none;
    min-height: 350px;
  }
  
  .recording-icon {
    width: 100px;
    height: 100px;
  }
  
  .recording-controls {
    flex-direction: column;
    gap: var(--space-4);
  }
  
  .recording-btn {
    min-width: 200px;
  }
  
  /* Modal adjustments for mobile */
  .modal-content {
    margin: var(--space-4);
    width: auto;
    max-width: none;
    max-height: calc(100vh - 2rem);
    max-height: calc(100dvh - 2rem);
  }
  
  .settings-modal-content {
    margin: var(--space-2);
    max-width: none;
    max-height: calc(100vh - 1rem);
    max-height: calc(100dvh - 1rem);
    min-height: 500px;
  }
  
  .registration-modal {
    margin: var(--space-2);
    max-width: none;
    max-height: calc(100vh - 1rem);
    max-height: calc(100dvh - 1rem);
    padding: var(--space-4);
  }
  
  /* Settings tabs mobile adjustments */
  .settings-tabs {
    flex-direction: column;
    gap: var(--space-1);
  }
  
  .settings-tab-btn {
    flex: none;
    width: 100%;
    justify-content: flex-start;
    text-align: left;
  }
  
  .settings-content {
    min-height: 350px;
  }
  
  /* About sub-tabs mobile */
  .about-sub-tabs {
    flex-direction: column;
    gap: var(--space-1);
  }
  
  .about-sub-tab-btn {
    flex: none;
    width: 100%;
    min-width: auto;
    text-align: center;
  }
  
  /* Usage stats mobile */
  .usage-stats-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  
  .usage-stat-card {
    padding: var(--space-3);
  }
  
  .usage-stat-header {
    gap: var(--space-2);
  }
  
  .usage-stat-value {
    font-size: 1.25rem;
  }
  
  /* About section mobile adjustments */
  .about-header {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
  
  .about-section-block {
    padding: var(--space-3);
  }
  
  .tier-info-blocks {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  
  .tier-info-block {
    padding: var(--space-3);
  }
  
  .profile-info-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    text-align: left;
  }
  
  .tier-benefits-list {
    gap: var(--space-3);
  }
  
  /* Payment info mobile adjustments */
  .payment-header {
    padding: var(--space-3);
  }
  
  .bank-account-info {
    padding: var(--space-3);
  }
  
  .bank-field {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    text-align: left;
  }
  
  .bank-value {
    width: 100%;
    text-align: center;
  }
  
  .tier-options {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  
  .tier-option {
    padding: var(--space-3);
  }
  
  .tier-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-2);
  }
  
  .payment-steps {
    padding: var(--space-3);
  }
  
  .payment-steps li {
    flex-direction: column;
    text-align: center;
    gap: var(--space-2);
  }
  
  .payment-steps li::before {
    align-self: center;
    margin: 0;
  }
  
  .payment-actions {
    gap: var(--space-2);
  }
  
  /* Registration steps mobile */
  .step-indicator {
    flex-direction: column;
    gap: var(--space-4);
  }
  
  .step-arrow {
    transform: rotate(90deg);
    margin: 0;
  }
  
  /* Subscription info mobile */
  .subscription-info {
    padding: var(--space-3);
  }
  
  .subscription-notice {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }
  
  .subscription-text {
    text-align: left;
  }
  
  /* Process steps mobile */
  .process-steps {
    gap: var(--space-3);
  }
  
  .process-step {
    padding: var(--space-3);
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }
  
  .step-number {
    align-self: center;
  }
  
  /* Security features mobile */
  .security-features {
    gap: var(--space-4);
  }
  
  .security-feature-item {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
  }
  
  .security-icon {
    align-self: center;
  }
  
  /* Legal subsection mobile */
  .legal-subsection {
    padding: var(--space-3);
  }
  
  /* Update entries mobile */
  .update-entry {
    padding: var(--space-4);
  }
  
  .update-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
  
  .update-list li {
    padding: var(--space-2);
    font-size: 0.8125rem;
  }
  
  /* Notification adjustments */
  .notification-container {
    top: var(--space-4);
    right: var(--space-4);
    left: var(--space-4);
    max-width: none;
  }
  
  /* Mobile friend request buttons */
  .friend-request-buttons {
    flex-direction: column;
    gap: var(--space-1);
  }
  
  .friend-request-btn {
    width: 100%;
    text-align: center;
  }
  
  /* Mobile Character Counter */
  .character-counter {
    margin-top: var(--space-2);
    padding: 0 var(--space-1);
  }
  
  /* Mobile audio/document messages */
  .audio-message,
  .document-message {
    max-width: 90%;
  }
  
  .audio-waveform {
    flex: 1;
    min-width: 60px;
  }
  
  .document-info {
    min-width: 100px;
  }
}

@media (max-width: 640px) {
  /* Even smaller screens */
  .modal-content {
    margin: var(--space-2);
    border-radius: var(--radius-lg);
  }
  
  .settings-modal-content {
    margin: var(--space-1);
    padding: var(--space-4);
    min-height: 450px;
  }
  
  .settings-content {
    min-height: 300px;
  }
  
  .auth-modal {
    margin: var(--space-4);
  }
  
  .registration-modal {
    margin: var(--space-1);
    padding: var(--space-3);
  }
  
  /* Compact header */
  .app-header {
    padding: 0 var(--space-4);
    height: 60px;
  }
  
  :root {
    --header-height: 60px;
  }
  
  .header-left h1 {
    font-size: 1rem;
  }
  
  /* Hide username text on very small screens */
  .username {
    display: none;
  }
  
  /* Make mobile nav smaller */
  .mobile-nav-content {
    width: min(300px, 90vw);
  }
  
  /* Compact mobile nav header */
  .mobile-nav-header {
    padding: var(--space-4) var(--space-5);
  }
  
  .mobile-nav-header h2 {
    font-size: 1.25rem;
  }
  
  /* Adjust mobile user header for small screens */
  .mobile-user-header {
    max-width: 250px;
  }
  
  .mobile-header-name {
    font-size: 0.8rem;
  }
  
  .mobile-header-status {
    font-size: 0.7rem;
  }
  
  .mobile-header-avatar {
    width: 32px;
    height: 32px;
    font-size: 1rem;
  }
  
  /* About sub-tabs small screens */
  .about-sub-tab-btn {
    font-size: 0.7rem;
    padding: var(--space-2);
  }
  
  /* Compact settings on small screens */
  .about-content {
    padding: var(--space-3);
  }
  
  .about-section-block {
    padding: var(--space-2);
  }
  
  .about-section-block h5 {
    font-size: 0.9rem;
  }
  
  .about-section-block p,
  .about-section-block li {
    font-size: 0.8rem;
    line-height: 1.6;
  }
  
  /* Process steps adjustments for small screens */
  .process-step {
    padding: var(--space-2);
  }
  
  .step-content h6 {
    font-size: 0.9rem;
  }
  
  .step-content p {
    font-size: 0.8rem;
  }
  
  /* Payment info adjustments for small screens */
  .payment-header {
    padding: var(--space-2);
  }
  
  .payment-header h3 {
    font-size: 1.25rem;
  }
  
  .bank-account-info {
    padding: var(--space-2);
  }
  
  .bank-field {
    padding: var(--space-2);
  }
  
  .tier-option {
    padding: var(--space-2);
  }
  
  .tier-header h5 {
    font-size: 1rem;
  }
  
  .tier-price {
    font-size: 1.25rem;
  }
  
  .payment-steps {
    padding: var(--space-2);
  }
  
  .critical-warning {
    padding: var(--space-3);
  }
  
  /* Subscription info adjustments */
  .subscription-info {
    padding: var(--space-2);
  }
  
  .subscription-text strong {
    font-size: 0.9rem;
  }
  
  .subscription-text p {
    font-size: 0.8rem;
  }
  
  /* Security features small screens */
  .security-feature-item {
    padding: var(--space-3);
  }
  
  .security-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
  }
  
  .security-details h6 {
    font-size: 0.9rem;
  }
  
  .security-details p {
    font-size: 0.8rem;
  }
  
  /* Legal section small screens */
  .legal-subsection {
    padding: var(--space-3);
  }
  
  .legal-subsection h6 {
    font-size: 0.9rem;
  }
  
  .legal-list li {
    font-size: 0.8rem;
    padding: var(--space-2);
  }
  
  .legal-disclaimer {
    padding: var(--space-3);
    font-size: 0.75rem;
  }
  
  .legal-acceptance {
    padding: var(--space-3);
    font-size: 0.85rem;
  }
  
  /* Update entries small screens */
  .update-entry {
    padding: var(--space-3);
  }
  
  .update-version h6 {
    font-size: 1rem;
  }
  
  .update-section-title {
    font-size: 0.8rem;
  }
  
  .update-list li {
    font-size: 0.75rem;
  }
  
  .update-notes {
    padding: var(--space-3);
  }
  
  .update-notes p {
    font-size: 0.8rem;
  }
  
  /* Increase mobile bottom padding for smaller screens */
  .message-input-area {
    padding-bottom: calc(25px + env(safe-area-inset-bottom, 0px));
  }
  
  /* Character Counter adjustments for small screens */
  .character-counter {
    font-size: 0.7rem;
  }
  
  /* Voice recording modal adjustments */
  .voice-recording-modal {
    min-height: 300px;
  }
  
  .recording-icon {
    width: 80px;
    height: 80px;
  }
  
  .recording-timer {
    font-size: 1.5rem;
  }
  
  /* Smaller upload menu */
  .upload-menu {
    min-width: 140px;
  }
  
  .upload-option {
    padding: var(--space-2) var(--space-3);
    font-size: 0.8rem;
  }
  
  /* Usage stats adjustments */
  .usage-stats-grid {
    gap: var(--space-2);
  }
  
  .usage-stat-card {
    padding: var(--space-2);
  }
  
  .usage-stat-value {
    font-size: 1.125rem;
  }
  
  .usage-stat-subtitle {
    font-size: 0.7rem;
  }
}

/* ===== Sticker Picker Styles ===== */

.sticker-picker-content {
  padding: var(--space-5);
  max-height: 500px;
  overflow-y: auto;
}

.sticker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: var(--space-3);
  padding: var(--space-2);
}

.sticker-item {
  aspect-ratio: 1;
  cursor: pointer;
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
  background: var(--bg-tertiary);
  padding: var(--space-2);
}

.sticker-item:hover {
  transform: scale(1.05);
  border-color: var(--primary-500);
  box-shadow: var(--shadow-lg);
  background: var(--bg-accent);
}

.sticker-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* Sticker in chat */
.sticker-message {
  padding: var(--space-2) !important;
  background: transparent !important;
  border: none !important;
}

.message.own .sticker-message {
  background: transparent !important;
  border: none !important;
}

.sticker-in-chat {
  max-width: 200px;
  max-height: 200px;
  width: auto;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
}

/* Mobile responsive for stickers */
@media (max-width: 768px) {
  .sticker-grid {
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--space-2);
  }
  
  .sticker-in-chat {
    max-width: 150px;
    max-height: 150px;
  }
  
  .sticker-picker-content {
    padding: var(--space-3);
    max-height: 400px;
  }
}

@media (max-width: 640px) {
  .sticker-grid {
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: var(--space-2);
  }
  
  .sticker-in-chat {
    max-width: 120px;
    max-height: 120px;
  }
}

/* ===== Link Safety Modal Styles ===== */

/* Link Safety Modal Content */
.link-safety-content {
  padding: var(--space-5);
  max-height: calc(90vh - 200px);
  max-height: calc(90dvh - 200px);
  overflow-y: auto;
}

/* URL Display */
.link-url-display {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-5);
  animation: slideUp var(--transition-fast);
}

.link-url-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.link-url-label svg {
  color: var(--primary-500);
  flex-shrink: 0;
}

.link-url-text {
  font-family: 'Courier New', monospace;
  font-size: 0.875rem;
  word-break: break-all;
  color: var(--text-primary);
  background: var(--bg-secondary);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  line-height: 1.6;
}

/* Link Safety Actions */
.link-safety-actions {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.link-safety-actions .btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

/* Link Check Section */
.link-check-section {
  margin-top: var(--space-5);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  animation: slideUp var(--transition-normal);
}

/* Link Check Loading State */
.link-check-loading {
  background: var(--bg-tertiary);
  text-align: center;
}

.link-check-loading .loading-state {
  padding: var(--space-8);
}

/* Link Check Error State */
.link-check-error {
  background: rgba(239, 68, 68, 0.05);
  border-color: var(--danger-500);
  border-left: 4px solid var(--danger-500);
  text-align: center;
}

.error-icon {
  color: var(--danger-500);
  margin-bottom: var(--space-3);
  display: flex;
  justify-content: center;
}

.link-check-error p {
  color: var(--danger-500);
  font-weight: 500;
  margin: 0;
}

/* Link Check Results */
.link-check-results {
  background: var(--bg-tertiary);
}

/* Link Check Status */
.link-check-status {
  margin-bottom: var(--space-5);
  text-align: center;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: var(--space-4);
  animation: bounceIn var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.status-badge.safe {
  background: linear-gradient(135deg, var(--success-500), var(--success-600));
  color: white;
}

.status-badge.warning {
  background: linear-gradient(135deg, var(--warning-500), var(--warning-600));
  color: var(--gray-900);
}

.status-badge.danger {
  background: linear-gradient(135deg, var(--danger-500), var(--danger-600));
  color: white;
}

.status-badge.unknown {
  background: linear-gradient(135deg, var(--gray-500), var(--gray-600));
  color: white;
}

.status-icon {
  font-size: 1.5rem;
}

.status-score {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Redirect Info */
.link-redirect-info,
.link-issues {
  margin-top: var(--space-5);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  animation: slideUp var(--transition-normal);
}

.link-redirect-info h4,
.link-issues h4 {
  margin: 0 0 var(--space-3) 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.link-redirect-info h4::before {
  content: '🔄';
  font-size: 1rem;
}

.link-issues h4::before {
  content: '⚠️';
  font-size: 1rem;
}

/* Redirect Chain */
.redirect-chain {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: redirect-counter;
}

.redirect-chain li {
  counter-increment: redirect-counter;
  padding: var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary-500);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  font-family: 'Courier New', monospace;
  font-size: 0.8125rem;
  word-break: break-all;
  position: relative;
  padding-left: var(--space-8);
  transition: all var(--transition-fast);
}

.redirect-chain li::before {
  content: counter(redirect-counter);
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  background: var(--primary-500);
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  font-family: 'Inter', sans-serif;
}

.redirect-chain li:hover {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
  transform: translateX(4px);
}

.redirect-chain li:last-child {
  margin-bottom: 0;
  border-left-color: var(--success-500);
}

.redirect-chain li:last-child::before {
  background: var(--success-500);
}

.redirect-url {
  display: block;
  color: var(--text-primary);
  line-height: 1.6;
}

.final-destination-badge {
  display: inline-block;
  margin-top: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--success-500);
  color: white;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: 'Inter', sans-serif;
}

/* Issues List */
.issues-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.issues-list li {
  display: flex;
  align-items: flex-start;
  padding: var(--space-3);
  background: rgba(245, 158, 11, 0.05);
  border-left: 3px solid var(--warning-500);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  font-size: 0.875rem;
  color: var(--text-primary);
  line-height: 1.6;
  transition: all var(--transition-fast);
}

.issues-list li::before {
  content: '⚠';
  color: var(--warning-500);
  font-weight: bold;
  margin-right: var(--space-3);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.issues-list li:hover {
  background: rgba(245, 158, 11, 0.1);
  transform: translateX(4px);
}

.issues-list li:last-child {
  margin-bottom: 0;
}

/* No Issues State */
.no-issues {
  padding: var(--space-4);
  background: rgba(16, 185, 129, 0.05);
  border-left: 3px solid var(--success-500);
  border-radius: var(--radius-md);
  text-align: center;
  font-size: 0.9375rem;
  color: var(--success-500);
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.no-issues::before {
  content: '✓';
  font-size: 1.25rem;
  font-weight: bold;
}

/* Timeout Warning */
.timeout-warning {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: rgba(245, 158, 11, 0.05);
  border-left: 3px solid var(--warning-500);
  border-radius: var(--radius-md);
  margin-top: var(--space-4);
  font-size: 0.875rem;
  color: var(--warning-500);
  font-weight: 500;
}

.timeout-warning svg {
  flex-shrink: 0;
  color: var(--warning-500);
}

/* Link Safety Info Notice */
.link-safety-info {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: rgba(99, 102, 241, 0.05);
  border: 1px solid var(--primary-500);
  border-left: 3px solid var(--primary-500);
  border-radius: var(--radius-lg);
  margin-top: var(--space-5);
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.link-safety-info svg {
  flex-shrink: 0;
  margin-top: var(--space-1);
  color: var(--primary-500);
}

.link-safety-info p {
  margin: 0;
  color: var(--text-secondary);
}

/* Message Link Styles */
.message-link {
  color: var(--primary-500);
  text-decoration: underline;
  cursor: pointer;
  word-break: break-all;
  transition: all var(--transition-fast);
  font-weight: 500;
}

.message-link:hover {
  color: var(--primary-600);
  text-decoration: none;
}

.message.own .message-link {
  color: rgba(255, 255, 255, 0.95);
  text-decoration: underline;
}

.message.own .message-link:hover {
  color: white;
  text-decoration: none;
}

/* ===== Mobile Responsive for Link Safety Modal ===== */

@media (max-width: 768px) {
  .link-safety-content {
    padding: var(--space-4);
    max-height: calc(90vh - 150px);
    max-height: calc(90dvh - 150px);
  }

  .link-url-display {
    padding: var(--space-3);
  }

  .link-url-text {
    font-size: 0.8125rem;
    padding: var(--space-2);
  }

  .link-safety-actions {
    flex-direction: column;
    gap: var(--space-2);
  }

  .link-check-section {
    padding: var(--space-4);
  }

  .status-badge {
    font-size: 1rem;
    padding: var(--space-2) var(--space-4);
  }

  .status-icon {
    font-size: 1.25rem;
  }

  .link-redirect-info,
  .link-issues {
    padding: var(--space-3);
  }

  .redirect-chain li {
    padding: var(--space-2);
    padding-left: var(--space-6);
    font-size: 0.75rem;
  }

  .redirect-chain li::before {
    width: 20px;
    height: 20px;
    font-size: 0.7rem;
    left: var(--space-2);
  }

  .issues-list li {
    padding: var(--space-2);
    font-size: 0.8125rem;
  }

  .link-safety-info {
    padding: var(--space-3);
    font-size: 0.8125rem;
  }
}

@media (max-width: 640px) {
  .link-safety-content {
    padding: var(--space-3);
  }

  .link-url-display {
    padding: var(--space-2);
  }

  .link-url-label {
    font-size: 0.8125rem;
  }

  .link-url-text {
    font-size: 0.75rem;
  }

  .link-check-section {
    padding: var(--space-3);
  }

  .status-badge {
    font-size: 0.9375rem;
    padding: var(--space-2) var(--space-3);
  }

  .link-redirect-info h4,
  .link-issues h4 {
    font-size: 0.875rem;
  }

  .redirect-chain li {
    font-size: 0.7rem;
  }

  .issues-list li {
    font-size: 0.75rem;
  }

  .link-safety-info {
    font-size: 0.75rem;
  }
}

/* Language Setting */
.language-setting {
  display: flex;
  gap: var(--space-2);
}

.language-setting .lang-btn {
  flex: 1;
  padding: var(--space-2) var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 60px;
}

.language-setting .lang-btn:hover {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.language-setting .lang-btn.active {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  border-color: var(--primary-500);
  box-shadow: var(--shadow-md);
}

/* Language Selector (Login & Registration) */
.language-selector,
.registration-language-selector {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin: 0 0 var(--space-4) 0;
    padding: 0;
}

.language-selector .lang-btn,
.registration-language-selector .lang-btn {
    padding: var(--space-2) var(--space-4);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 600;
    transition: all var(--transition-fast);
    min-width: 60px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.language-selector .lang-btn:hover,
.registration-language-selector .lang-btn:hover {
    background: var(--bg-accent);
    border-color: var(--border-color-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.language-selector .lang-btn.active,
.registration-language-selector .lang-btn.active {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-color: var(--primary-500);
    color: white;
    box-shadow: var(--shadow-md);
}

/* ===== Message Search Modal Styles ===== */

/* Search Modal Content */
.search-modal-content {
  max-width: 600px;
  max-height: 90vh;
  max-height: 90dvh;
}

.search-content {
  padding: var(--space-5);
  max-height: calc(90vh - 200px);
  max-height: calc(90dvh - 200px);
  overflow-y: auto;
}

/* Search Input Container */
.search-input-container {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  align-items: center;
}

.search-input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-input::placeholder {
  color: var(--text-muted);
}

/* Search Options */
.search-options {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.search-toggle-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.search-toggle-btn:hover {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.search-toggle-btn.active {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  border-color: var(--primary-500);
  box-shadow: var(--shadow-md);
}

.search-toggle-btn svg {
  flex-shrink: 0;
}

/* Search Results Info */
.search-results-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.search-results-count {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-500);
  font-family: 'Courier New', monospace;
  letter-spacing: 0.05em;
}

/* Search Navigation */
.search-navigation {
  display: flex;
  gap: var(--space-2);
}

.search-navigation .btn-icon {
  width: 32px;
  height: 32px;
  padding: var(--space-1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-navigation .btn-icon:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.search-navigation .btn-icon:not(:disabled):hover {
  background: var(--primary-500);
  color: white;
  border-color: var(--primary-500);
  transform: translateY(-1px);
}

/* Search Error Display */
.search-error {
  padding: var(--space-4);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--danger-500);
  border-left: 4px solid var(--danger-500);
  border-radius: var(--radius-lg);
  color: var(--danger-500);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: slideUp var(--transition-fast);
}

.search-error::before {
  content: '⚠';
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* Search Help Section */
.search-help {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-top: var(--space-5);
}

.search-help h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.search-help h4::before {
  content: '💡';
  font-size: 1.125rem;
}

.search-help ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3);
}

.search-help li {
  display: flex;
  align-items: flex-start;
  padding: var(--space-3);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary-500);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.search-help li:hover {
  background: var(--bg-accent);
  border-color: var(--border-color-hover);
  transform: translateX(4px);
}

.search-help code {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  background: var(--bg-accent);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: 'Courier New', monospace;
  font-size: 0.8125rem;
  color: var(--primary-500);
  font-weight: 600;
  margin-right: var(--space-2);
  flex-shrink: 0;
}

.search-help li span {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Search Highlight in Messages */
.search-highlight {
  background: linear-gradient(135deg, var(--warning-500), var(--warning-600));
  color: var(--gray-900);
  padding: 2px 4px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  animation: pulse 1s infinite;
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

.message.own .search-highlight {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: var(--gray-900);
}

/* Active Search Result */
.search-result-active {
  position: relative;
  animation: pulse 1.5s infinite;
}

.search-result-active::before {
  content: '';
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border: 2px solid var(--warning-500);
  border-radius: var(--radius-lg);
  animation: pulse 1.5s infinite;
  pointer-events: none;
}

/* Search Button in Header */
#searchBtn {
  position: relative;
}

#searchBtn.has-results::after {
  content: '';
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: var(--warning-500);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-secondary);
  animation: pulse 2s infinite;
}

/* ===== Mobile Responsive for Search Modal ===== */

@media (max-width: 768px) {
  .search-modal-content {
    margin: var(--space-4);
    width: auto;
    max-width: none;
    max-height: calc(100vh - 2rem);
    max-height: calc(100dvh - 2rem);
  }

  .search-content {
    padding: var(--space-4);
    max-height: calc(90vh - 150px);
    max-height: calc(90dvh - 150px);
  }

  .search-input-container {
    flex-direction: column;
    align-items: stretch;
  }

  .search-input-container .btn {
    width: 100%;
  }

  .search-options {
    gap: var(--space-2);
  }

  .search-toggle-btn {
    flex: 1;
    min-width: 0;
    justify-content: center;
    font-size: 0.8125rem;
    padding: var(--space-2) var(--space-3);
  }

  .search-results-info {
    flex-direction: column;
    gap: var(--space-3);
    align-items: stretch;
  }

  .search-results-count {
    text-align: center;
  }

  .search-navigation {
    justify-content: center;
  }

  .search-help {
    padding: var(--space-3);
  }

  .search-help ul {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .search-help li {
    padding: var(--space-2);
    font-size: 0.8125rem;
  }

  .search-help code {
    font-size: 0.75rem;
  }
}

@media (max-width: 640px) {
  .search-modal-content {
    margin: var(--space-2);
  }

  .search-content {
    padding: var(--space-3);
  }

  .search-input {
    font-size: 0.8125rem;
  }

  .search-toggle-btn {
    font-size: 0.75rem;
    padding: var(--space-2);
  }

  .search-toggle-btn span {
    display: none;
  }

  .search-toggle-btn svg {
    margin: 0;
  }

  .search-help {
    padding: var(--space-2);
  }

  .search-help h4 {
    font-size: 0.9375rem;
  }

  .search-help li {
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-2);
  }

  .search-help code {
    margin-right: 0;
    margin-bottom: var(--space-1);
  }

  .search-error {
    padding: var(--space-3);
    font-size: 0.8125rem;
  }
}

/* Additional Search Animation States */
@keyframes searchPulse {
  0%, 100% { 
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.4);
  }
  50% { 
    box-shadow: 0 0 0 10px rgba(245, 158, 11, 0);
  }
}

.searching-indicator {
  animation: searchPulse 1.5s infinite;
}

/* Search Input Focus State Enhancement */
.search-input-container:focus-within {
  position: relative;
}

.search-input-container:focus-within::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  border: 2px solid var(--primary-500);
  border-radius: var(--radius-md);
  opacity: 0.5;
  pointer-events: none;
  animation: pulse 2s infinite;
}

/* Search No Results State */
.search-no-results {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  text-align: center;
  color: var(--text-muted);
}

.search-no-results svg {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  opacity: 0.5;
  color: var(--text-secondary);
}

.search-no-results h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.search-no-results p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== About Link in Login/Registration ===== */
.about-link-container {
  text-align: center;
  margin: var(--space-4) 0;
  padding: var(--space-3) 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.about-link-container .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-decoration: none;
  min-width: 200px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.about-link-container .btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.about-link-container .btn svg {
  flex-shrink: 0;
  vertical-align: middle;
  transition: transform var(--transition-fast);
}

.about-link-container .btn:hover svg {
  transform: scale(1.1);
}

/* Mobile responsive for about link */
@media (max-width: 640px) {
  .about-link-container {
    margin: var(--space-3) 0;
    padding: var(--space-2) 0;
  }
  
  .about-link-container .btn {
    min-width: 100%;
    font-size: 0.8125rem;
    padding: var(--space-2) var(--space-3);
  }
  
  .about-link-container .btn svg {
    width: 16px;
    height: 16px;
  }
}

/* Additional mobile-specific fixes */
@media (max-width: 768px) {
  /* Ensure proper viewport handling */
  body {
    position: fixed;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    top: 0;
    left: 0;
    overflow: hidden;
  }
  
  /* Prevent body scroll */
  body.modal-open {
    overflow: hidden;
  }
  
  /* Improve touch scrolling */
  .messages-container,
  .friends-list,
  .mobile-friends-list,
  .update-log-content {
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
  }
  
  /* Ensure input area is always visible */
  .message-input-area {
    position: relative;
    z-index: 10;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
  }
}

/* Fix for devices with notches/safe areas */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  @media (max-width: 768px) {
    .message-input-area {
      padding-bottom: calc(var(--mobile-bottom-padding) + env(safe-area-inset-bottom));
    }
  }
}

/* Fix for landscape orientation on mobile */
@media (max-width: 768px) and (orientation: landscape) {
  .app-header {
    height: 50px;
  }
  
  :root {
    --header-height: 50px;
  }
  
  .header-left h1 {
    font-size: 0.9rem;
  }
  
  .messages-container {
    padding: var(--space-3);
  }
  
  .message-input-area {
    padding: var(--space-2) var(--space-4);
    padding-bottom: calc(15px + env(safe-area-inset-bottom, 0px));
  }
}