:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #6b7280;
  --card-bg: #f7f7f8;
  --border: #e5e7eb;
  --accent: #2563eb;
}

body[data-theme="dark"] {
  --bg: #0f1216;
  --text: #e5e7eb;
  --muted: #9aa2b1;
  --card-bg: #141820;
  --border: #232835;
  --accent: #60a5fa;
}

/* Base */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
.hidden { display: none; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.brand h1 { margin: 0; font-size: 20px; font-weight: 700; }
.brand .sub { display: block; font-size: 12px; color: var(--muted); }
.controls { display: flex; gap: 8px; align-items: center; }
.toggle { border: 1px solid var(--border); background: var(--card-bg); color: var(--text); border-radius: 8px; padding: 6px 10px; cursor: pointer; }

/* Filters */
.filters { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.filters .row { display: flex; gap: 8px; align-items: center; }
.filters .row.wrap { flex-wrap: wrap; margin-top: 10px; }
.filter-group { display: grid; gap: 6px; margin-right: 12px; }
.filter-group.small { align-items: center; grid-auto-flow: column; }
.label { font-size: 12px; color: var(--muted); }
.options { display: flex; gap: 8px; flex-wrap: wrap; }
.input { width: 100%; max-width: 560px; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--border); background: var(--card-bg); color: var(--text); }
.btn { border: 1px solid var(--border); background: var(--card-bg); color: var(--text); border-radius: 8px; padding: 8px 12px; cursor: pointer; }
.btn.ghost { background: transparent; }
.btn:hover { border-color: var(--accent); }

/* Filter chips */
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: 999px; border: 1px solid var(--border); background: var(--card-bg); cursor: pointer; user-select: none; }
.chip input { appearance: none; width: 14px; height: 14px; border: 1px solid var(--border); border-radius: 3px; background: transparent; }
.chip input:checked { background: var(--accent); border-color: var(--accent); }
.chip input:checked + span { color: var(--text); font-weight: 600; }
.chip:hover { border-color: var(--accent); }

/* Mobile: collapse advanced filters */
@media (max-width: 640px) {
  #filters[data-collapsed="true"] .row.wrap { display: none; }
  .filters .row { flex-wrap: wrap; }
  .controls { gap: 10px; }
}

/* Cards grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  padding: 16px;
}
.card {
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.thumb {
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
  background: #0c0c0c10;
  filter: saturate(105%);
  opacity: 0;
  transition: opacity .25s ease;
}
.thumb.loaded { opacity: 1; }
.card-body { padding: 10px 12px; display: grid; gap: 6px; }
.name { font-weight: 600; }
.subject { font-size: 12px; color: var(--muted); }
.meta { display: flex; gap: 8px; font-size: 12px; color: var(--muted); }
.tags { display: flex; gap: 6px; flex-wrap: wrap; padding: 8px 12px; border-top: 1px solid var(--border); }
.tag { font-size: 11px; padding: 2px 6px; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); }

.status { margin: 10px 16px; padding: 8px 12px; border: 1px dashed var(--border); border-radius: 8px; color: var(--muted); }
.sentinel { height: 48px; }

/* Details page */
.details { display: grid; gap: 16px; padding: 16px; }
.embed { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.embed iframe { width: 100%; min-height: 420px; border: 0; display: block; }
.info { display: grid; gap: 10px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 12px; }
.info .subject { font-size: 14px; color: var(--muted); }
.links { display: flex; gap: 8px; }

.site-footer { padding: 16px; border-top: 1px solid var(--border); color: var(--muted); }

@media (min-width: 900px) {
  .embed iframe { min-height: 560px; }
}