/* ── 香港49图库 ── 前台样式 ── */

:root {
  --bg: #0f0f1a;
  --card-bg: #1a1a2e;
  --card-border: #2a2a4a;
  --primary: #e8b923;
  --primary-glow: rgba(232, 185, 35, 0.15);
  --text: #e8e8f0;
  --text-muted: #8888a0;
  --shadow: 0 4px 20px rgba(0,0,0,0.3);
  --radius: 10px;
  --gap: 8px;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  min-height: 100vh;
  padding-bottom: 60px;
}

/* ── Header ── */
.header {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  border-bottom: 1px solid var(--card-border);
  padding: 16px 12px;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header h1 {
  font-size: 20px;
  color: var(--primary);
  letter-spacing: 2px;
  text-shadow: 0 0 20px var(--primary-glow);
}

.header .subtitle {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ── Image Grid ── */
.gallery {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  aspect-ratio: 3 / 4;
}

.gallery-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.4);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity 0.3s;
}

.gallery-item img.loading {
  opacity: 0.3;
}

.gallery-item .img-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 6px 8px;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  font-size: 11px;
  color: #ccc;
  text-align: center;
  pointer-events: none;
}

/* ── Loading / Error ── */
.loading-state,
.error-state,
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.loading-state .spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid var(--card-border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 12px;
}

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

.error-state {
  color: #ff6b6b;
}

.error-state .retry-btn {
  display: inline-block;
  margin-top: 12px;
  padding: 8px 24px;
  background: var(--primary);
  color: #1a1a2e;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

/* ── Lightbox ── */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.92);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.6);
}

.lightbox .close-btn {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 28px;
  color: #fff;
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  transition: background 0.2s;
}

.lightbox .close-btn:hover {
  background: rgba(255,255,255,0.2);
}

.lightbox .nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 36px;
  color: #aaa;
  cursor: pointer;
  padding: 10px;
  transition: color 0.2s;
  user-select: none;
}

.lightbox .nav-btn:hover {
  color: var(--primary);
}

.lightbox .nav-prev {
  left: 10px;
}

.lightbox .nav-next {
  right: 10px;
}

.lightbox .counter {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  color: #888;
  font-size: 13px;
  background: rgba(0,0,0,0.5);
  padding: 4px 14px;
  border-radius: 12px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
    padding: 8px;
  }
  .header h1 { font-size: 17px; }
}

@media (max-width: 480px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 5px;
    padding: 6px;
  }
  .gallery-item {
    aspect-ratio: 3 / 4;
  }
  .lightbox .nav-btn { font-size: 28px; }
  .lightbox .close-btn { top: 10px; right: 10px; }
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--card-bg);
  color: var(--text);
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  font-size: 13px;
  z-index: 2000;
  display: none;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

.toast.show {
  display: block;
  animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}