/**
 * Floating Action Button (FAB) Styles
 *
 * Provides styling for the floating site selector button and expandable menu.
 * Follows Material Design principles with smooth animations and accessibility support.
 */

/* ========================================
   Floating Button Base Styles
   ======================================== */

.floating-button {
  position: fixed;
  width: 56px;
  height: 56px;
  border-radius: 28px;
  border: none;
  background-color: #3498db;
  color: white;
  font-size: 24px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  z-index: 9999;
  transition: all 200ms ease;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  touch-action: manipulation;
}

.floating-button:hover {
  background-color: #2980b9;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
  transform: scale(1.05);
}

.floating-button:active {
  transform: scale(0.95);
}

.floating-button:focus {
  outline: 3px solid #3498db;
  outline-offset: 2px;
}

.floating-button.expanded {
  background-color: #e74c3c;
}

.floating-button.expanded:hover {
  background-color: #c0392b;
}

.fab-icon {
  display: inline-block;
  transition: transform 200ms ease;
  user-select: none;
  line-height: 1;
}

.floating-button.expanded .fab-icon {
  transform: rotate(90deg);
}

/* ========================================
   Menu Container Styles
   ======================================== */

.fab-menu {
  position: fixed;
  bottom: 90px;
  right: 20px;
  width: 320px;
  max-height: 600px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  opacity: 0;
  transform: scale(0.8) translateY(20px);
  transform-origin: bottom right;
  transition: opacity 250ms cubic-bezier(0.4, 0, 0.2, 1),
              transform 250ms cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 9998;
}

.fab-menu.visible {
  opacity: 1;
  transform: scale(1) translateY(0);
}

/* ========================================
   Site List Container
   ======================================== */

.fab-menu-sites {
  max-height: 560px;
  overflow-y: auto;
  padding: 8px 0;
}

/* Smooth scrolling */
.fab-menu-sites {
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

/* Custom scrollbar */
.fab-menu-sites::-webkit-scrollbar {
  width: 6px;
}

.fab-menu-sites::-webkit-scrollbar-track {
  background: transparent;
}

.fab-menu-sites::-webkit-scrollbar-thumb {
  background: #ddd;
  border-radius: 3px;
}

.fab-menu-sites::-webkit-scrollbar-thumb:hover {
  background: #ccc;
}

/* ========================================
   Category Styles
   ======================================== */

.fab-menu-category {
  margin-bottom: 8px;
}

.fab-menu-category-title {
  font-size: 12px;
  font-weight: 600;
  color: #888;
  text-transform: uppercase;
  padding: 8px 16px 4px;
  margin: 0;
  letter-spacing: 0.5px;
}

/* ========================================
   Site Item Styles
   ======================================== */

.fab-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  text-decoration: none;
  color: #333;
  transition: background 150ms ease;
  cursor: pointer;
}

.fab-menu-item:hover,
.fab-menu-item.selected {
  background: #f5f5f5;
}

.fab-menu-item:active {
  background: #e0e0e0;
}

.fab-menu-item:focus {
  outline: 2px solid #3498db;
  outline-offset: -2px;
  background: #f5f5f5;
}

.fab-menu-item .site-icon {
  font-size: 24px;
  flex-shrink: 0;
  line-height: 1;
}

.fab-menu-item .site-name {
  flex: 1;
  font-weight: 500;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fab-menu-item .site-visits {
  font-size: 12px;
  color: #888;
  flex-shrink: 0;
}

.fab-menu-item .site-indicators {
  font-size: 16px;
  flex-shrink: 0;
  line-height: 1;
}

.indicator-cloudflare {
  display: inline-block;
}

/* ========================================
   Loading State Styles
   ======================================== */

.fab-menu-loading {
  padding: 40px 20px;
  text-align: center;
  color: #666;
}

.fab-menu-loading p {
  margin: 0;
  font-size: 14px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  margin: 0 auto 16px;
  border: 4px solid #f0f0f0;
  border-top-color: #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* ========================================
   Error State Styles
   ======================================== */

.fab-menu-error {
  padding: 40px 20px;
  text-align: center;
}

.fab-menu-error .error-icon {
  font-size: 48px;
  margin: 0 0 8px;
  line-height: 1;
}

.fab-menu-error .error-message {
  color: #e74c3c;
  margin: 0 0 16px;
  font-size: 14px;
}

.fab-menu-error .retry-button {
  padding: 8px 24px;
  background: #3498db;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: background 150ms ease;
}

.fab-menu-error .retry-button:hover {
  background: #2980b9;
}

.fab-menu-error .retry-button:active {
  background: #21618c;
}

/* ========================================
   Empty State Styles
   ======================================== */

.fab-menu-empty {
  padding: 40px 20px;
  text-align: center;
  color: #999;
  font-size: 14px;
  margin: 0;
}

/* ========================================
   Mobile Responsive Styles
   ======================================== */

@media (max-width: 768px) {
  .fab-menu {
    width: calc(100vw - 40px);
    right: 20px;
    left: 20px;
    max-width: 400px;
  }

  .floating-button {
    /* Button size remains 56px for touch target */
  }

  .fab-menu-item {
    padding: 14px 16px;
  }

  .fab-menu-item .site-name {
    font-size: 15px;
  }
}

@media (max-width: 480px) {
  .fab-menu {
    width: calc(100vw - 20px);
    right: 10px;
    left: 10px;
  }

  .floating-button {
    right: 10px;
    bottom: 10px;
  }

  .fab-menu {
    bottom: 80px;
  }
}

/* ========================================
   High Contrast Mode Support
   ======================================== */

@media (prefers-contrast: high) {
  .floating-button {
    border: 2px solid currentColor;
  }

  .fab-menu {
    border: 2px solid #333;
  }

  .fab-menu-item:focus {
    outline-width: 3px;
  }
}

/* ========================================
   Reduced Motion Support
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  .floating-button,
  .fab-icon,
  .fab-menu,
  .fab-menu-item,
  .retry-button {
    transition: none;
  }

  .loading-spinner {
    animation: none;
    border-top-color: #3498db;
  }
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
  .floating-button,
  .fab-menu {
    display: none !important;
  }
}