:root {
  --bg: #faf8f5;
  --surface: #ffffff;
  --ink: #2b2622;
  --ink-soft: #6b6258;
  --accent: #a86b3c;
  --accent-soft: #f0e4d6;
  --border: #e4ddd3;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Noto Sans TC', sans-serif;
  background: var(--bg);
  color: var(--ink);
}

h1, h2 {
  font-family: 'Noto Serif TC', serif;
  margin: 0;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

header h1 { font-size: 20px; }

button {
  font-family: 'Noto Sans TC', sans-serif;
  font-size: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  border-radius: 8px;
  padding: 10px 16px;
  min-height: 44px;
  cursor: pointer;
}

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

.layout {
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  gap: 20px;
  padding: 20px;
}

#sidebar {
  width: 200px;
  flex-shrink: 0;
}

.cat-item {
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  margin-bottom: 2px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cat-item:hover { background: var(--accent-soft); }
.cat-item.active { background: var(--accent); color: #fff; }

.cat-add {
  display: flex;
  gap: 6px;
  margin-top: 12px;
}

.cat-add input {
  flex: 1;
  min-width: 0;
  font-size: 16px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.cat-add button {
  padding: 8px 10px;
  min-height: auto;
}

main { flex: 1; min-width: 0; }

.toolbar { margin-bottom: 16px; }

.toolbar input {
  width: 100%;
  font-size: 16px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.card:hover { transform: translateY(-2px); }

.card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
  background: var(--accent-soft);
}

.card-body { padding: 10px; }

.card-cat {
  font-size: 11px;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card-note {
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-imgcount {
  font-size: 11px;
  color: var(--ink-soft);
  margin-top: 4px;
}

.empty {
  text-align: center;
  color: var(--ink-soft);
  padding: 60px 20px;
  font-size: 14px;
}

.hidden { display: none !important; }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}

.modal-content {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 440px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-content h2 { margin-bottom: 16px; font-size: 18px; }

.modal-content label {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
  margin: 14px 0 6px;
}

.modal-content select,
.modal-content input[type="text"],
.modal-content textarea {
  width: 100%;
  font-size: 16px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
}

.modal-content input[type="file"] {
  width: 100%;
  font-size: 14px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

.viewer {
  position: fixed;
  inset: 0;
  background: rgba(20,16,12,0.92);
  z-index: 200;
  display: flex;
  flex-direction: column;
}

.viewer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  color: #fff;
}

.viewer-top button {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border-color: rgba(255,255,255,0.2);
  margin-left: 8px;
}

#viewerCat { color: #fff; font-weight: 700; }

#viewerBody {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 0 20px;
}

#viewerBody img {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: 6px;
}

#viewerMeta {
  color: #e8e2d8;
  padding: 16px 20px 24px;
  font-size: 14px;
  max-width: 600px;
  margin: 0 auto;
}

#viewerMeta a { color: #f0c896; }

@media (max-width: 768px) {
  .layout { flex-direction: column; padding: 16px; }
  #sidebar { width: 100%; display: flex; flex-wrap: wrap; gap: 6px; }
  #catList { display: flex; flex-wrap: wrap; gap: 6px; }
  .cat-item { margin-bottom: 0; }
  .cat-add { width: 100%; margin-top: 8px; }
  header h1 { font-size: 17px; }
}

@media (max-width: 480px) {
  .grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
  .card img { height: 120px; }
  header { padding: 12px 14px; }
}