glam/frontend/src/styles/collapsible.css

/**
 * Shared styles for collapsible headers and fullscreen mode
 * Import this in components that use useCollapsibleHeader or useFullscreen hooks
 */

/* =============================================================================
   COLLAPSIBLE HEADER TRANSITIONS
   ============================================================================= */

/* Base transition for all collapsible headers */
.collapsible-header {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

/* Collapsed state - hide content smoothly */
.collapsible-header--collapsed {
  max-height: 0 !important;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  opacity: 0;
  pointer-events: none;
}

/* Alternative: Compact mode (shrink but don't hide completely) */
.collapsible-header--compact {
  padding-top: 0.25rem !important;
  padding-bottom: 0.25rem !important;
}

.collapsible-header--compact h1,
.collapsible-header--compact h2 {
  font-size: 1rem !important;
  margin: 0 !important;
}

.collapsible-header--compact .subtitle,
.collapsible-header--compact p {
  display: none;
}

/* =============================================================================
   EXPAND/COLLAPSE TOGGLE BUTTON
   ============================================================================= */

.header-toggle-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  font-size: 0.75rem;
  color: #666;
  z-index: 10;
  transition: all 0.2s ease;
}

.header-toggle-btn:hover {
  background: #fff;
  border-color: #007bff;
  color: #007bff;
}

/* Sticky toggle when header is collapsed */
.header-toggle-btn--sticky {
  position: fixed;
  top: 70px; /* Below main nav */
  right: 1rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* =============================================================================
   FULLSCREEN MODE
   ============================================================================= */

/* Container in fullscreen mode */
.fullscreen-container {
  transition: all 0.3s ease;
}

.fullscreen-container--active {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  z-index: 9999 !important;
  background: #fff;
  margin: 0 !important;
  padding: 0 !important;
  border-radius: 0 !important;
}

/* Hide sidebar in fullscreen */
.fullscreen-container--active .sidebar,
.fullscreen-container--active .page-sidebar {
  display: none !important;
}

/* Expand main content in fullscreen */
.fullscreen-container--active .main-content,
.fullscreen-container--active .content-area {
  width: 100% !important;
  max-width: 100% !important;
  margin: 0 !important;
}

/* Fullscreen toggle button */
.fullscreen-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #f8f9fa;
  border: 1px solid #dee2e6;
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-size: 0.875rem;
  color: #495057;
  transition: all 0.2s ease;
}

.fullscreen-btn:hover {
  background: #e9ecef;
  border-color: #adb5bd;
  color: #212529;
}

.fullscreen-btn--active {
  background: #007bff;
  border-color: #007bff;
  color: #fff;
}

.fullscreen-btn--active:hover {
  background: #0056b3;
  border-color: #0056b3;
}

/* Fullscreen icon */
.fullscreen-btn__icon {
  width: 16px;
  height: 16px;
}

/* Exit fullscreen button (fixed position in fullscreen mode) */
.fullscreen-exit-btn {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: background 0.2s ease;
}

.fullscreen-exit-btn:hover {
  background: rgba(0, 0, 0, 0.85);
}

/* =============================================================================
   RESPONSIVE ADJUSTMENTS
   ============================================================================= */

@media (max-width: 768px) {
  .header-toggle-btn--sticky {
    top: 60px;
    right: 0.5rem;
  }
  
  .fullscreen-exit-btn {
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
  }
}

/* =============================================================================
   ANIMATION UTILITIES
   ============================================================================= */

@keyframes slideUp {
  from {
    opacity: 1;
    max-height: 200px;
  }
  to {
    opacity: 0;
    max-height: 0;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    max-height: 0;
  }
  to {
    opacity: 1;
    max-height: 200px;
  }
}

.animate-slide-up {
  animation: slideUp 0.3s ease forwards;
}

.animate-slide-down {
  animation: slideDown 0.3s ease forwards;
}