/* Immersive Full-Screen Lightbox Media Viewer */

.viewer-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(8, 8, 10, 0.96);
  backdrop-filter: blur(20px);
  display: none; /* Controlled by JS */
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  transition: opacity var(--transition-normal);
  user-select: none;
}

.viewer-overlay.active {
  display: flex;
  opacity: 1;
}

/* Lightbox Header */
.viewer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
  z-index: 1010;
  transition: transform var(--transition-normal);
}

.viewer-header-title {
  display: flex;
  flex-direction: column;
  max-width: 50%;
}

.viewer-filename {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.viewer-meta-simple {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.viewer-header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.viewer-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--border-radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.viewer-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--glass-border-focus);
  color: var(--accent);
  transform: translateY(-1px);
}

.viewer-btn.close-btn:hover {
  color: var(--error);
  border-color: rgba(239, 68, 68, 0.3);
  background: var(--error-glow);
}

/* Main Lightbox Body (Contains Canvas/Viewports & Sidebar) */
.viewer-viewport-container {
  flex: 1;
  display: flex;
  position: relative;
  overflow: hidden;
  align-items: center;
  justify-content: center;
}

/* Navigational Arrows */
.nav-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1015;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-normal);
}

.nav-arrow:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-50%) scale(1.08);
}

.nav-arrow-left {
  left: 2rem;
}

.nav-arrow-right {
  right: 2rem;
}

/* Zoom & Pan Viewport Window */
.viewport-window {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.media-wrapper {
  max-width: 90%;
  max-height: 85%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform-origin: center center;
  transition: transform var(--transition-fast);
  will-change: transform;
}

.media-wrapper.zoom-active {
  max-width: none;
  max-height: none;
  cursor: grab;
}

.media-wrapper.grabbing {
  cursor: grabbing;
}

.viewer-media-element {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
  border-radius: var(--border-radius-sm);
  display: none;
}

.viewer-media-element.active {
  display: block;
}

/* Custom HTML5 Video Player Skin overlay */
.custom-player-controls {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  max-width: 90%;
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius-md);
  z-index: 1020;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.player-progress-bar-container {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-full);
  position: relative;
  cursor: pointer;
  transition: height var(--transition-fast);
}

.player-progress-bar-container:hover {
  height: 8px;
}

.player-progress-buffered {
  position: absolute;
  height: 100%;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--border-radius-full);
  left: 0;
  width: 0;
}

.player-progress-filled {
  position: absolute;
  height: 100%;
  background: linear-gradient(to right, var(--accent), var(--accent-alt));
  border-radius: var(--border-radius-full);
  left: 0;
  width: 0;
}

.player-progress-knob {
  position: absolute;
  width: 14px;
  height: 14px;
  background: white;
  border-radius: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0);
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
  transition: transform var(--transition-fast);
}

.player-progress-bar-container:hover .player-progress-knob {
  transform: translate(-50%, -50%) scale(1);
}

.player-buttons {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.player-left-group, .player-right-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.player-icon-btn {
  background: transparent;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.player-icon-btn:hover {
  color: var(--accent);
}

.player-time-stamp {
  font-size: 0.8rem;
  font-family: monospace;
  color: var(--text-secondary);
}

.player-volume-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.volume-slider {
  width: 70px;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.2);
  height: 4px;
  border-radius: var(--border-radius-full);
  outline: none;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-primary);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.3);
  background: var(--accent);
}

/* Metadata Sidebar Panels */
.metadata-sidebar {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 360px;
  z-index: 1025;
  border-left: 1px solid var(--glass-border);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.metadata-sidebar.active {
  transform: translateX(0);
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sidebar-header h2 {
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
}

.sidebar-close {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.1rem;
}

.sidebar-close:hover {
  color: var(--text-primary);
}

.metadata-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  overflow-y: auto;
}

.metadata-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

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

.meta-value {
  font-size: 0.9rem;
  color: var(--text-primary);
  word-break: break-all;
  font-weight: 500;
}

/* Utility to toggle sidebar button */
.viewer-btn.sidebar-toggle.active {
  background: var(--accent-glow);
  color: var(--accent);
  border-color: var(--accent);
}

@media (max-width: 992px) {
  .metadata-sidebar {
    width: 100%;
    max-width: 400px;
    background: rgba(10, 10, 12, 0.98);
  }
}

@media (max-width: 768px) {
  .nav-arrow {
    width: 44px;
    height: 44px;
  }
  .nav-arrow-left { left: 0.5rem; }
  .nav-arrow-right { right: 0.5rem; }
  .viewer-header { padding: 1rem; }
  .viewer-header-title { max-width: 40%; }
}