/* Museum AR - Styles */

:root {
  --primary-color: #1a1a2e;
  --secondary-color: #16213e;
  --accent-color: #e94560;
  --text-color: #eaeaea;
  --card-bg: #0f0f1a;
  --card-hover: #1f1f3a;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--text-color);
  min-height: 100vh;
}

/* ===== Selection Screen ===== */
#selection-screen {
  padding: 20px;
  min-height: 100vh;
}

.screen-title {
  text-align: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--text-color);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
}

.artwork-card {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid rgba(255,255,255,0.1);
}

.artwork-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  background: var(--card-hover);
}

.artwork-card:active {
  transform: scale(0.98);
}

.card-thumbnail {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  background-color: #333;
}

.card-title {
  padding: 12px;
  font-size: 0.9rem;
  text-align: center;
  line-height: 1.3;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Custom URL Input */
.custom-input-section {
  max-width: 600px;
  margin: 30px auto 0;
  padding: 20px;
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.1);
}

.custom-input-section label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
}

.custom-input-section input {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: #222;
  color: var(--text-color);
  font-size: 1rem;
  margin-bottom: 12px;
}

.custom-input-section button {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: var(--accent-color);
  color: white;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.2s;
}

.custom-input-section button:hover {
  background: #ff6b7a;
}

/* ===== AR Viewer Screen ===== */
#ar-screen {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  flex-direction: column;
  overflow: hidden;
}

#ar-screen.active {
  display: flex;
}

#selection-screen.hidden {
  display: none;
}

.ar-header {
  padding: 12px 20px;
  background: var(--card-bg);
  display: flex;
  align-items: center;
  gap: 12px;
}

.back-button {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

.ar-title {
  font-size: 1rem;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Source & License Info */
.source-info {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  background: rgba(0, 0, 0, 0.3);
  font-size: 0.75rem;
  color: #aaa;
}

.source-info a {
  color: #88b4ff;
  text-decoration: none;
}

.source-info a:hover {
  text-decoration: underline;
}

.license-text {
  color: #888;
}

#ar-container {
  flex: 1;
  position: relative;
  padding-bottom: 100px; /* Space for fixed controls */
}

model-viewer {
  width: 100%;
  height: 100%;
}

.ar-controls {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  padding-bottom: max(16px, env(safe-area-inset-bottom));
  background: var(--card-bg);
  z-index: 100;
}

.ar-info {
  font-size: 0.9rem;
  margin-bottom: 12px;
  text-align: center;
  color: #aaa;
}

.ar-activate-btn {
  width: 100%;
  padding: 16px;
  border: none;
  border-radius: 12px;
  background: var(--accent-color);
  color: white;
  font-size: 1.1rem;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.2s;
}

.ar-activate-btn:hover {
  background: #ff6b7a;
}

.ar-guide-text {
  margin-top: 12px;
  font-size: 0.85rem;
  color: #888;
  text-align: center;
}

/* QR Code Section */
#qr-section {
  text-align: center;
  padding: 20px 0;
}

.qr-title {
  margin-bottom: 16px;
  font-size: 1rem;
  color: #ccc;
}

#qr-code {
  display: inline-block;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
  background: white;
  padding: 8px;
}

.qr-url {
  margin-top: 12px;
  font-size: 0.85rem;
  color: #888;
}

/* Loading State */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  color: #888;
}

.loading::after {
  content: '';
  width: 24px;
  height: 24px;
  margin-left: 12px;
  border: 3px solid #444;
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Error State */
.error-message {
  background: rgba(233, 69, 96, 0.2);
  border: 1px solid var(--accent-color);
  border-radius: 8px;
  padding: 16px;
  margin: 20px;
  text-align: center;
}

/* ===== AR Guide & Prompt Styles ===== */

/* AR Guide overlay (shown before AR starts) */
.ar-guide {
  position: absolute;
  bottom: 120px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 16px 24px;
  border-radius: 12px;
  text-align: center;
  font-size: 1rem;
  max-width: 300px;
  backdrop-filter: blur(8px);
  z-index: 10;
}

.ar-guide p {
  margin: 0;
}

.ar-guide-sub {
  font-size: 0.85rem;
  color: #aaa;
  margin-top: 8px !important;
}

/* AR Prompt (custom AR button in model-viewer slot) */
.ar-prompt {
  display: none; /* Hidden by default, model-viewer shows it */
}

/* Model loading spinner */
.model-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* AR Button improvements */
.ar-activate-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1.1rem;
  flex: 1;
}

/* Button group for multiple AR options */
.ar-button-group {
  display: flex;
  gap: 8px;
  width: 100%;
}

.ar-wall-btn {
  background: linear-gradient(135deg, #4a90d9, #357abd);
}

.ar-wall-btn:hover {
  background: linear-gradient(135deg, #5aa0e9, #4588c9);
}

/* Hide guide when AR is active (JS will handle this) */
#ar-screen.ar-active .ar-guide {
  display: none;
}