:root {
  --bg: #0d0e12;
  --panel: #15171d;
  --panel-2: #1c1f27;
  --line: #262a34;
  --text: #e7e8ee;
  --muted: #9095a3;
  --accent: #7c6cff;
  --accent-2: #2dd4bf;
  --pink: #ff5c8a;
  --radius: 12px;
  --side: 248px;
  --top: 60px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f6f9; --panel: #ffffff; --panel-2: #eef0f5; --line: #e1e3ea;
    --text: #15171d; --muted: #646a7a; color-scheme: light;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--text);
  font: 14px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }

/* ---------- top bar */
.top {
  position: sticky; top: 0; z-index: 20; height: var(--top);
  display: flex; align-items: center; gap: 16px; padding: 0 16px;
  padding-top: env(safe-area-inset-top);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; text-decoration: none; letter-spacing: -.01em; white-space: nowrap; }
.search { flex: 1; max-width: 560px; position: relative; }
.search svg { position: absolute; left: 12px; top: 50%; width: 16px; height: 16px; transform: translateY(-50%); fill: none; stroke: var(--muted); stroke-width: 2; }
.search input {
  width: 100%; height: 38px; padding: 0 12px 0 36px; border-radius: 10px;
  background: var(--panel-2); border: 1px solid var(--line); outline: none;
}
.search input:focus { border-color: var(--accent); }
.tabs { display: flex; gap: 4px; }
.tabs a { padding: 7px 12px; border-radius: 8px; text-decoration: none; color: var(--muted); font-weight: 500; }
.tabs a.on { background: var(--panel-2); color: var(--text); }

/* ---------- layout */
.layout { display: grid; grid-template-columns: var(--side) 1fr; min-height: calc(100vh - var(--top)); }
.side { border-right: 1px solid var(--line); padding: 16px 12px; position: sticky; top: var(--top); height: calc(100vh - var(--top)); overflow: auto; }
main { min-width: 0; padding: 16px; }
.side h4 { margin: 18px 8px 6px; font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); font-weight: 600; }
.side h4:first-child { margin-top: 0; }
.facet {
  display: flex; align-items: center; justify-content: space-between; gap: 8px; width: 100%;
  padding: 6px 8px; border: 0; background: none; border-radius: 8px; text-align: left; color: var(--text);
}
.facet:hover { background: var(--panel-2); }
.facet.on { background: color-mix(in srgb, var(--accent) 22%, transparent); }
.facet .n { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.facet .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.facet .lbl { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- library grid */
.bar { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.bar h2 { margin: 0; font-size: 18px; letter-spacing: -.01em; }
.bar .count { color: var(--muted); }
.bar .sp { flex: 1; }
select, .btn {
  height: 34px; padding: 0 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel);
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn:disabled { opacity: .5; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.card {
  position: relative; border-radius: var(--radius); overflow: hidden; background: var(--panel);
  border: 1px solid var(--line); cursor: pointer; padding: 0; text-align: left; display: block; width: 100%;
}
.card img { display: block; width: 100%; aspect-ratio: 16/9; object-fit: cover; background: var(--panel-2); }
.card .meta { padding: 8px 10px; display: flex; gap: 6px; align-items: center; min-width: 0; }
.card .ts { font-variant-numeric: tabular-nums; font-size: 12px; color: var(--muted); flex: none; }
.card .title { font-size: 12px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card .tags { position: absolute; left: 8px; right: 46px; top: 8px; display: flex; gap: 4px; flex-wrap: wrap; }
.tag { max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; padding: 2px 7px; border-radius: 999px; background: rgba(13,14,18,.72); color: #fff; backdrop-filter: blur(6px); }
.card .save {
  position: absolute; right: 8px; top: 8px; width: 30px; height: 30px; border-radius: 8px; border: 0;
  background: rgba(13,14,18,.72); color: #fff; opacity: 0; transition: opacity .15s;
}
.card:hover .save, .card .save.on { opacity: 1; }
.card .save.on { background: var(--accent); }
.card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sentinel { height: 40px; }
.empty { padding: 60px 20px; text-align: center; color: var(--muted); }

/* ---------- graph */
.graph-wrap { position: relative; height: calc(100vh - var(--top) - 32px); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--panel); }
.graph-wrap .legend { position: absolute; left: 12px; bottom: 12px; font-size: 12px; color: var(--muted); background: var(--panel-2); padding: 6px 10px; border-radius: 8px; pointer-events: none; }
.graph-wrap .controls { position: absolute; right: 12px; top: 12px; display: flex; gap: 6px; }

/* ---------- viewer */
dialog#viewer {
  width: min(1100px, calc(100vw - 24px)); max-height: calc(100vh - 24px); padding: 0; border: 1px solid var(--line);
  border-radius: 16px; background: var(--panel); color: var(--text); overflow: auto;
}
dialog#viewer::backdrop { background: rgba(0,0,0,.65); backdrop-filter: blur(4px); }
.vw { display: grid; grid-template-columns: 1.6fr 1fr; }
.vw .stage { background: #000; position: relative; }
.vw .stage img, .vw .stage iframe { display: block; width: 100%; aspect-ratio: 16/9; border: 0; object-fit: contain; }
.vw .info { padding: 18px; display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.vw h3 { margin: 0; font-size: 16px; line-height: 1.35; }
.vw .close { position: absolute; right: 10px; top: 10px; z-index: 2; width: 34px; height: 34px; border-radius: 50%; border: 0; background: rgba(0,0,0,.6); color: #fff; font-size: 18px; }
.vw .row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.vw .yt { display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border-radius: 10px; background: #ff0033; color: #fff; text-decoration: none; font-weight: 600; }
.chip { font-size: 12px; padding: 4px 10px; border-radius: 999px; background: var(--panel-2); border: 1px solid var(--line); text-decoration: none; }
.swatch { width: 30px; height: 30px; border-radius: 8px; border: 1px solid var(--line); cursor: pointer; }
.kv { font-size: 12px; color: var(--muted); }
.similar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.similar img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 6px; cursor: pointer; display: block; }

/* ---------- vault */
.vault { display: grid; grid-template-columns: 1fr 280px; gap: 16px; }
.vault .doc { min-width: 0; }
.vault .title-in { width: 100%; font-size: 22px; font-weight: 700; border: 0; background: none; outline: none; padding: 4px 0; letter-spacing: -.01em; }
.vault textarea {
  width: 100%; min-height: 220px; resize: vertical; border-radius: 10px; border: 1px solid var(--line);
  background: var(--panel); padding: 12px; font: 13px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; outline: none;
}
.vault textarea:focus { border-color: var(--accent); }
.md { line-height: 1.65; }
.md h1, .md h2, .md h3 { letter-spacing: -.01em; margin: 1em 0 .4em; }
.md a.wl { color: var(--accent); text-decoration: none; border-bottom: 1px dashed; }
.md a.wl.missing { color: var(--muted); }
.md .embed { display: inline-block; width: 220px; margin: 4px 6px 4px 0; vertical-align: top; border-radius: 8px; overflow: hidden; border: 1px solid var(--line); cursor: pointer; background: var(--panel); }
.md .embed img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; }
.md .embed span { display: block; padding: 4px 8px; font-size: 11px; color: var(--muted); }
.md p:has(> .embed:only-child) { display: inline-block; margin: 0; }
.md code { background: var(--panel-2); padding: 1px 5px; border-radius: 4px; }
.vault aside { border-left: 1px solid var(--line); padding-left: 16px; }
.vault aside h4 { margin: 0 0 8px; font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.vault .mini-graph { height: 260px; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; margin-bottom: 16px; background: var(--panel); }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button { border: 0; background: var(--panel); padding: 6px 12px; }
.seg button.on { background: var(--panel-2); font-weight: 600; }
.hint { color: var(--muted); font-size: 12px; }

#toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px); opacity: 0;
  background: var(--text); color: var(--bg); padding: 8px 14px; border-radius: 10px; transition: .2s; pointer-events: none; z-index: 50;
}
#toast.show { opacity: 1; transform: translateX(-50%); }

/* ---------- responsive: phones / tablets */
@media (max-width: 860px) {
  :root { --top: 104px; }
  .top { height: auto; flex-wrap: wrap; padding: 10px 16px; row-gap: 8px; }
  .search { order: 3; flex-basis: 100%; max-width: none; }
  .tabs { margin-left: auto; }
  .layout { grid-template-columns: 1fr; }
  .side { position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--line); padding: 8px 16px; display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; }
  .side h4, .side .vids { display: none; }
  .side .facet { width: auto; flex: none; border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; }
  main { padding: 12px 16px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 8px; }
  .card .meta { padding: 6px 8px; }
  .card .title { display: none; }
  .card .tags .tag:nth-child(n+2) { display: none; }
  .card .save { opacity: 1; }
  .vw { grid-template-columns: 1fr; }
  .vault { grid-template-columns: 1fr; }
  .vault aside { border-left: 0; padding-left: 0; }
  .graph-wrap { height: calc(100vh - var(--top) - 80px); }
}
@media (max-width: 420px) {
  .brand span { display: none; }
}