/* คลังรูปภาพ — Modern clean UI */
:root {
  --bg: #eef1f5;
  --bg-accent: #e2e8f0;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #d8dee8;
  --primary: #0d6e6e;
  --primary-hover: #0a5858;
  --danger: #c0392b;
  --danger-hover: #a93226;
  --shadow: 0 8px 28px rgba(15, 23, 42, .08);
  --radius: 14px;
  --radius-sm: 10px;
  --header-h: 72px;
  --jpg: #2563eb;
  --png: #059669;
  --webp: #7c3aed;
  --gif: #db2777;
  --font: "IBM Plex Sans Thai", "Sora", sans-serif;
  --display: "Sora", "IBM Plex Sans Thai", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 500px at 10% -10%, #d7ecec 0%, transparent 55%),
    radial-gradient(900px 400px at 100% 0%, #dce3f5 0%, transparent 50%),
    var(--bg);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font: inherit; }
.skip-link {
  position: absolute; left: -999px; top: 0; background: #000; color: #fff; padding: 8px 12px; z-index: 9999;
}
.skip-link:focus { left: 8px; top: 8px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,.86);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1280px; margin: 0 auto; padding: 12px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 12px; flex-shrink: 0;
  background: linear-gradient(135deg, #0d6e6e, #1d4ed8);
  box-shadow: 0 6px 16px rgba(13,110,110,.35);
}
.brand-name {
  margin: 0; font-family: var(--display); font-size: 1.15rem; font-weight: 700; letter-spacing: -.02em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.brand-tag { margin: 0; font-size: .78rem; color: var(--muted); }
.header-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.admin-bar { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.admin-badge {
  background: #0f172a; color: #fff; font-size: .72rem; font-weight: 700;
  padding: 4px 8px; border-radius: 999px; letter-spacing: .04em;
}
body.admin-mode .site-header { border-bottom-color: #0d6e6e; box-shadow: inset 0 -2px 0 #0d6e6e; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 44px; padding: 0 16px; border-radius: 12px; border: 1px solid transparent;
  cursor: pointer; font-weight: 600; transition: .15s ease; text-decoration: none; color: inherit;
  -webkit-tap-highlight-color: transparent;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: #e8eef5; color: var(--text); }
.btn-secondary:hover { background: #d9e3ef; }
.btn-ghost { background: transparent; border-color: var(--border); }
.btn-ghost:hover { background: #f1f5f9; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-sm { min-height: 36px; padding: 0 12px; font-size: .9rem; border-radius: 10px; }
.btn-block { width: 100%; }
.icon-btn {
  width: 40px; height: 40px; border: 0; background: transparent; font-size: 1.6rem;
  cursor: pointer; border-radius: 10px; color: var(--muted);
}
.icon-btn:hover { background: #f1f5f9; color: var(--text); }

/* Main / Toolbar */
.main { max-width: 1280px; margin: 0 auto; padding: 16px; }
.toolbar {
  display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center;
  margin-bottom: 14px;
}
.search-wrap { position: relative; }
.search-icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--muted); }
#searchInput {
  width: 100%; min-height: 48px; padding: 0 14px 0 42px; border: 1px solid var(--border);
  border-radius: 14px; background: var(--surface); outline: none;
}
#searchInput:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(13,110,110,.15); }
.filters { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.filters select, .form-row select, .form-row input, .form-row textarea, #catSearch {
  min-height: 44px; padding: 0 12px; border: 1px solid var(--border); border-radius: 12px;
  background: var(--surface); width: 100%;
}
.filters select { width: auto; min-width: 130px; }
.form-row textarea { padding: 10px 12px; min-height: 80px; resize: vertical; }

/* Categories */
.category-bar-wrap { display: flex; gap: 8px; align-items: center; margin-bottom: 16px; }
.category-bar {
  display: flex; gap: 8px; overflow-x: auto; scrollbar-width: thin; flex: 1;
  padding-bottom: 4px; -webkit-overflow-scrolling: touch;
}
.cat-chip {
  flex: 0 0 auto; min-height: 40px; padding: 0 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); cursor: pointer; font-weight: 600;
  color: var(--muted); white-space: nowrap;
}
.cat-chip.active { background: var(--text); color: #fff; border-color: var(--text); }
.cat-all-btn { display: none; flex-shrink: 0; }

.admin-bulk {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
  background: #f0fdfa; border: 1px solid #99f6e4; border-radius: var(--radius-sm);
  padding: 10px 14px; margin-bottom: 14px;
}

/* Gallery grid */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}
@media (max-width: 900px) {
  .gallery { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .toolbar { grid-template-columns: 1fr; }
  .cat-all-btn { display: inline-flex; }
}
@media (max-width: 560px) {
  .gallery { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .brand-tag { display: none; }
  .header-actions .btn-primary span, .btn-primary { font-size: .9rem; }
}
@media (max-width: 360px) {
  .gallery { grid-template-columns: 1fr; }
}

.card {
  background: var(--surface); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid rgba(15,23,42,.04);
  display: flex; flex-direction: column; transition: transform .15s ease, box-shadow .15s ease;
  position: relative;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(15,23,42,.12); }
.card-check {
  position: absolute; top: 8px; left: 8px; z-index: 2;
  width: 22px; height: 22px; accent-color: var(--primary);
}
.card-delete {
  position: absolute; top: 8px; right: 8px; z-index: 2;
  width: 28px; height: 28px; border: 0; border-radius: 50%;
  background: rgba(15, 23, 42, .55); color: #fff;
  font-size: 1.15rem; line-height: 1; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0; transition: background .15s ease;
}
.card-delete:hover { background: var(--danger); }
.card-media {
  aspect-ratio: 1; background: #e8edf4; cursor: pointer; overflow: hidden; position: relative;
}
.card-media img {
  width: 100%; height: 100%; object-fit: cover;
}
.card-body { padding: 10px 12px 12px; display: flex; flex-direction: column; gap: 8px; }
.card-id { font-family: var(--display); font-weight: 700; font-size: .92rem; letter-spacing: .02em; }
.card-meta { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; font-size: .78rem; color: var(--muted); }
.badge {
  display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 999px;
  font-size: .68rem; font-weight: 700; letter-spacing: .04em; color: #fff;
}
.badge-jpg { background: var(--jpg); }
.badge-png { background: var(--png); }
.badge-webp { background: var(--webp); }
.badge-gif { background: var(--gif); }
.card-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.card-actions .btn { flex: 1; min-width: 0; padding: 0 8px; min-height: 36px; font-size: .8rem; }

/* Skeleton */
.skeleton {
  background: linear-gradient(90deg, #e8edf4 25%, #f5f7fb 50%, #e8edf4 75%);
  background-size: 200% 100%; animation: shimmer 1.2s infinite; border-radius: var(--radius);
  aspect-ratio: 1;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

.gallery-status {
  text-align: center; padding: 28px 12px; color: var(--muted);
}
.empty-state, .error-state {
  text-align: center; padding: 48px 16px; color: var(--muted);
}
.load-more-wrap { text-align: center; padding: 20px; }
.scroll-sentinel { height: 1px; }

/* Modal */
.modal {
  position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center;
  padding: 12px;
}
.modal[hidden] { display: none !important; }
.modal-backdrop {
  position: absolute; inset: 0; background: rgba(15, 23, 42, .55); backdrop-filter: blur(2px);
}
.modal-panel {
  position: relative; z-index: 1; width: min(520px, 100%); max-height: min(92vh, 900px);
  background: var(--surface); border-radius: 18px; box-shadow: 0 24px 64px rgba(0,0,0,.25);
  display: flex; flex-direction: column; overflow: hidden;
  animation: modalIn .18s ease;
}
.modal-lg { width: min(720px, 100%); }
.modal-sm { width: min(400px, 100%); }
.modal-preview { width: min(960px, 100%); }
.modal-sheet {
  width: min(480px, 100%); align-self: flex-end; margin-top: auto;
  border-radius: 18px 18px 0 0; max-height: 80vh;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(10px) scale(.98); } to { opacity: 1; transform: none; } }
.modal-head {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 14px 16px; border-bottom: 1px solid var(--border);
}
.modal-head h2 { margin: 0; font-size: 1.1rem; font-family: var(--display); }
.modal-body { padding: 16px; overflow: auto; -webkit-overflow-scrolling: touch; flex: 1; }
.modal-foot {
  display: flex; justify-content: flex-end; gap: 8px; padding: 12px 16px;
  border-top: 1px solid var(--border);
}
.form-row { margin-bottom: 12px; }
.form-row label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .9rem; }
.form-error { color: var(--danger); margin: 8px 0; }
.hint { color: var(--muted); font-size: .85rem; margin: 6px 0 0; }

/* Dropzone */
.dropzone {
  border: 2px dashed #94a3b8; border-radius: var(--radius); padding: 28px 16px;
  text-align: center; background: #f8fafc; margin-bottom: 14px; transition: .15s;
}
.dropzone.dragover { border-color: var(--primary); background: #f0fdfa; }
.upload-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.upload-item {
  display: grid; grid-template-columns: 56px 1fr auto; gap: 10px; align-items: center;
  padding: 8px; border: 1px solid var(--border); border-radius: 12px; background: #fff;
}
.upload-item img { width: 56px; height: 56px; object-fit: cover; border-radius: 8px; }
.upload-item .meta { min-width: 0; }
.upload-item .name { font-weight: 600; font-size: .88rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.upload-item .sub { font-size: .78rem; color: var(--muted); }
.upload-item select { min-height: 32px; margin-top: 4px; font-size: .8rem; }
.upload-item .status { font-size: .78rem; margin-top: 2px; }
.upload-item .status.ok { color: #059669; }
.upload-item .status.err { color: var(--danger); }
.progress-wrap { margin-top: 12px; }
.progress-bar { height: 8px; background: #e2e8f0; border-radius: 999px; overflow: hidden; }
.progress-fill { height: 100%; width: 0; background: var(--primary); transition: width .2s; }

/* Preview */
.preview-body { display: flex; flex-direction: column; gap: 12px; }
.preview-stage {
  position: relative; background: #0f172a; border-radius: 12px; min-height: 240px;
  display: flex; align-items: center; justify-content: center; overflow: hidden;
  touch-action: pan-y;
}
.preview-img-wrap {
  width: 100%; height: min(55vh, 520px); display: flex; align-items: center; justify-content: center;
  overflow: hidden; cursor: grab;
}
.preview-img-wrap img {
  max-width: 100%; max-height: 100%; object-fit: contain; transform-origin: center center;
  transition: transform .15s ease; user-select: none;
}
.nav-btn {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 2;
  width: 44px; height: 44px; border-radius: 50%; border: 0; background: rgba(255,255,255,.9);
  font-size: 1.6rem; cursor: pointer; box-shadow: 0 4px 12px rgba(0,0,0,.2);
}
.nav-btn.prev { left: 8px; }
.nav-btn.next { right: 8px; }
.preview-tools, .preview-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.format-choices { display: flex; flex-direction: column; gap: 8px; }
.format-choice {
  display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; align-items: center;
  padding: 10px 12px; border: 1px solid var(--border); border-radius: 12px; cursor: pointer;
  background: #fff;
}
.format-choice:has(input:checked) { border-color: var(--primary); background: #f0fdfa; }
.format-choice input { grid-row: span 2; width: 18px; height: 18px; accent-color: var(--primary); }
.format-choice span { font-weight: 700; }
.format-choice small { grid-column: 2; color: var(--muted); font-size: .8rem; }
.preview-meta {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 8px;
  font-size: .88rem; color: var(--muted); background: #f8fafc; border-radius: 12px; padding: 12px;
}
.preview-meta strong { color: var(--text); display: block; font-size: .78rem; }

.cat-create { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.cat-create input { flex: 1; min-width: 120px; min-height: 40px; padding: 0 10px; border: 1px solid var(--border); border-radius: 10px; }
.cat-list, .cat-picker-list { display: flex; flex-direction: column; gap: 8px; }
.cat-row {
  display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center;
  padding: 10px; border: 1px solid var(--border); border-radius: 12px;
}
.cat-picker-item {
  padding: 12px 14px; border: 1px solid var(--border); border-radius: 12px; cursor: pointer; background: #fff;
}
.cat-picker-item:hover, .cat-picker-item.active { border-color: var(--primary); background: #f0fdfa; }
.admin-meta { font-size: .8rem; color: var(--muted); background: #f8fafc; padding: 10px; border-radius: 10px; margin: 8px 0; word-break: break-all; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  background: #0f172a; color: #fff; padding: 12px 18px; border-radius: 12px;
  z-index: 200; box-shadow: var(--shadow); max-width: min(90vw, 400px); text-align: center;
  animation: toastIn .2s ease;
}
.toast[hidden] { display: none !important; }
.toast.error { background: var(--danger); }
.toast.success { background: #065f46; }
@keyframes toastIn { from { opacity: 0; transform: translate(-50%, 8px); } to { opacity: 1; transform: translate(-50%, 0); } }

body.modal-open { overflow: hidden; }
.admin-only[hidden], [hidden] { display: none !important; }
body.admin-mode .admin-only { display: flex !important; }
body.admin-mode #adminBulk.admin-only { display: flex !important; }
body.admin-mode .card .admin-only,
body.admin-mode button.admin-only { display: inline-flex !important; }
body.admin-mode #btnAdminLogin { display: none !important; }