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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  color: #fff;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  cursor: none;
}

body.setup-mode {
  cursor: default;
}

/* === Screens === */
.screen {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
}

/* === Setup Screen === */
#setup-screen {
  background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #16213e 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
}

.setup-container {
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 2rem;
}

.setup-header {
  text-align: center;
  margin-bottom: 2rem;
}

.setup-header h1 {
  font-size: 2.2rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 0.95rem;
  color: #888;
}

.subtitle.connected {
  color: #4ade80;
}

.subtitle.error {
  color: #f87171;
}

/* === Source Buttons === */
.section h2 {
  font-size: 1rem;
  font-weight: 500;
  color: #aaa;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.source-buttons {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.source-btn {
  flex: 1;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.06);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.source-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
}

.source-btn.selected {
  background: rgba(99, 102, 241, 0.2);
  border-color: #6366f1;
}

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

/* === Albums List === */
.albums-list {
  max-height: 300px;
  overflow-y: auto;
  margin-bottom: 1.5rem;
}

.loading-text {
  text-align: center;
  color: #666;
  padding: 1rem;
}

.album-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 2px solid transparent;
  border-radius: 10px;
  margin-bottom: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.album-item:hover {
  background: rgba(255, 255, 255, 0.08);
}

.album-item.selected {
  background: rgba(99, 102, 241, 0.15);
  border-color: #6366f1;
}

.album-thumb {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  object-fit: cover;
  background: #222;
}

.album-info {
  flex: 1;
}

.album-name {
  font-size: 1rem;
  font-weight: 500;
}

.album-count {
  font-size: 0.8rem;
  color: #888;
  margin-top: 2px;
}

/* === Start Button === */
.start-btn {
  display: block;
  width: 100%;
  padding: 1rem;
  background: #6366f1;
  border: none;
  border-radius: 12px;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.03em;
}

.start-btn:hover:not(:disabled) {
  background: #4f46e5;
  transform: translateY(-1px);
}

.start-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* === Setup Error === */
.setup-error {
  text-align: center;
  padding: 2rem;
}

.setup-error p {
  margin-bottom: 0.75rem;
}

.error-detail {
  color: #888;
  font-size: 0.85rem;
}

.setup-error button {
  margin-top: 1rem;
  padding: 0.75rem 2rem;
  background: #6366f1;
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

/* === Slideshow === */
#slideshow-screen {
  background: #000;
}

.bg-blur {
  position: absolute;
  top: -20px; left: -20px;
  width: calc(100% + 40px);
  height: calc(100% + 40px);
  background-size: cover;
  background-position: center;
  filter: blur(30px) brightness(0.35);
  opacity: 0;
  transition: opacity 1.5s ease;
  z-index: 1;
}

.bg-blur.visible {
  opacity: 1;
}

.photo-layer {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 2s ease;
  z-index: 2;
}

.photo-layer.active {
  opacity: 1;
}

/* === Overlay === */
.overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 10;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.5s ease;
}

.overlay.hidden {
  opacity: 0;
}

.overlay-top-right {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  text-align: right;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8), 0 0 20px rgba(0, 0, 0, 0.5);
}

.clock {
  font-size: 2.5rem;
  font-weight: 200;
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.date-display {
  font-size: 0.95rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 0.25rem;
}

.overlay-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 2rem 1rem;
  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 100%);
}

.exif-info {
  font-size: 0.85rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 0.75rem;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.8);
}

.progress-bar {
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 2px;
  transition: width 0.3s linear;
}

/* === Touch Zones === */
.touch-zone {
  position: absolute;
  top: 0;
  height: 100%;
  z-index: 20;
  cursor: pointer;
}

.touch-left {
  left: 0;
  width: 20%;
}

.touch-center {
  left: 20%;
  width: 60%;
}

.touch-right {
  right: 0;
  width: 20%;
}

/* === Settings Button === */
.settings-btn {
  position: absolute;
  top: 1rem;
  left: 1rem;
  width: 44px;
  height: 44px;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  z-index: 30;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.settings-btn.visible {
  opacity: 1;
  pointer-events: auto;
}

/* === Scrollbar Styling === */
.albums-list::-webkit-scrollbar,
.setup-container::-webkit-scrollbar {
  width: 6px;
}

.albums-list::-webkit-scrollbar-track,
.setup-container::-webkit-scrollbar-track {
  background: transparent;
}

.albums-list::-webkit-scrollbar-thumb,
.setup-container::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

/* === Responsive === */
@media (max-width: 600px) {
  .setup-container {
    padding: 1.25rem;
  }
  .setup-header h1 {
    font-size: 1.6rem;
  }
  .clock {
    font-size: 1.8rem;
  }
  .overlay-top-right {
    top: 1rem;
    right: 1rem;
  }
  .overlay-bottom {
    padding: 1rem 1rem 0.5rem;
  }
  .source-buttons {
    flex-direction: column;
  }
}

/* === Loading Spinner === */
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 0.5rem;
  vertical-align: middle;
}

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

/* === Fade-in Animation === */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.album-item {
  animation: fadeIn 0.3s ease forwards;
}