/* ===== 全局 ===== */
:root {
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #555;
  --text-muted: #999;
  --border-color: #e0e0e0;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --success: #10b981;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-hover: 0 4px 12px rgba(0,0,0,0.1);
  --transition: 0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

/* ===== Header ===== */
.header {
  text-align: center;
  padding: 32px 20px 16px;
}
.header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.header-info {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ===== Gallery Grid ===== */
.gallery {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 20px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
}

/* ===== Card ===== */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}
.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  background: #e5e7eb;
  cursor: pointer;
  transition: opacity var(--transition);
}
.card-image:hover { opacity: 0.92; }

.card-body {
  padding: 12px 14px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card-prompt {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-all;
}

.card-note {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.card-date {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: auto;
}

.card-actions {
  display: flex;
  gap: 8px;
  padding-top: 4px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: none;
  border-radius: 7px;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  font-family: inherit;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: #e5e7eb;
  color: var(--text-primary);
}
.btn-secondary:hover { background: #d1d5db; }

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover { background: var(--danger-hover); }

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}
.btn-outline:hover { background: var(--bg); }

.btn-sm {
  padding: 5px 10px;
  font-size: 0.75rem;
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding: 24px 20px 40px;
  flex-wrap: wrap;
}
.pagination button {
  min-width: 36px;
  height: 36px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text-primary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}
.pagination button:hover:not(:disabled) {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.pagination button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 600;
}
.pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.pagination .ellipsis {
  padding: 0 4px;
  color: var(--text-muted);
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #1a1a2e;
  color: #fff;
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 0.85rem;
  z-index: 200;
  pointer-events: none;
  opacity: 0;
  transition: all 0.3s ease;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 20px;
  border-top: 1px solid var(--border-color);
  margin-top: 20px;
}
.admin-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.8rem;
}
.admin-link:hover { color: var(--accent); }

/* ===== Loading ===== */
.loading {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ===== 燈箱 ===== */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 150;
  cursor: pointer;
  animation: fadeIn 0.2s ease;
}
.lightbox img {
  max-width: 92vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 8px;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===== 響應式 ===== */
@media (max-width: 600px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    padding: 10px;
  }
  .card-body { padding: 8px 10px; }
  .header h1 { font-size: 1.3rem; }
}