:root {
  --bg: #0b0e17;
  --bg2: #111524;
  --card: #151a2e;
  --line: #232a45;
  --text: #e8eaf2;
  --dim: #9aa1b8;
  --accent: #7c5cff;
  --teal: #38e1c6;
  --red: #ff6b6b;
  --amber: #ffb84d;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  line-height: 1.55;
}
.wrap { max-width: 1400px; margin: 0 auto; padding: 0 20px; }
a { color: var(--accent); }

/* header */
.site-header { background: var(--bg2); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; padding-bottom: 12px; }
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 42px; height: 42px; border-radius: 10px; background: #0b1026;
  border: 1px solid var(--line); display: flex; align-items: center; justify-content: center;
  font-family: monospace; font-weight: bold; font-size: 20px; color: var(--red);
}
.brand h1 { margin: 0; font-size: 22px; letter-spacing: 0.5px; }
.tagline { margin: 0; color: var(--dim); font-size: 13px; }
.site-header nav a { color: var(--dim); text-decoration: none; font-size: 14px; margin-left: 18px; }
.site-header nav a:hover { color: var(--text); }

/* upload view */
.hero { max-width: 760px; margin: 60px auto; text-align: center; }
.hero h2 { font-size: 34px; margin: 0 0 10px; }
.hero h2 .boom { color: var(--red); }
.hero p { color: var(--dim); font-size: 16px; }
.dropzone {
  margin-top: 28px; border: 2px dashed var(--line); border-radius: 16px;
  padding: 48px 24px; cursor: pointer; transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background: var(--bg2); }
.dropzone .big { font-size: 18px; font-weight: 600; }
.dropzone .dim { color: var(--dim); font-size: 13px; margin-top: 6px; }
.row { display: flex; gap: 12px; justify-content: center; align-items: center; margin-top: 20px; flex-wrap: wrap; }
select, input[type="search"], input[type="text"] {
  background: var(--card); border: 1px solid var(--line); color: var(--text);
  border-radius: 10px; padding: 8px 14px; font-size: 14px;
}
.privacy { margin-top: 18px; font-size: 13px; color: var(--dim); }
.error { margin-top: 14px; color: var(--red); font-size: 14px; }

/* buttons */
.btn {
  background: var(--bg2); border: 1px solid var(--line); color: var(--text);
  border-radius: 10px; padding: 8px 18px; font-size: 14px; cursor: pointer; text-decoration: none;
  display: inline-block;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.danger { border-color: var(--red); color: var(--red); }
.btn:disabled { opacity: .45; cursor: default; }

/* app layout */
.toolbar { display: flex; align-items: center; gap: 12px; padding: 14px 0; flex-wrap: wrap; }
.toolbar .spacer { flex: 1; }
.badge {
  font-size: 12px; color: var(--dim); border: 1px solid var(--line); border-radius: 999px;
  padding: 3px 12px;
}
.app { display: grid; grid-template-columns: 250px 1fr 340px; gap: 14px; padding-bottom: 40px; min-height: 60vh; }
@media (max-width: 1100px) { .app { grid-template-columns: 220px 1fr; } .panel-right { grid-column: 1 / -1; } .sidebar, .panel-right { position: static; max-height: none; } }
@media (max-width: 760px) { .app { grid-template-columns: 1fr; } }

.sidebar, .panel-right {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 14px; align-self: start; max-height: calc(100vh - 32px); overflow: auto;
  position: sticky; top: 16px;
}
.sidebar h3, .panel-right h3 { margin: 0 0 10px; font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--dim); }
.sidebar input { width: 100%; margin-bottom: 10px; }
.model-group { margin-bottom: 12px; }
.model-group > .glabel { font-size: 11px; color: var(--dim); text-transform: uppercase; letter-spacing: .06em; margin: 8px 0 4px; }
.model-item {
  display: flex; justify-content: space-between; align-items: center; width: 100%;
  background: none; border: 1px solid transparent; color: var(--text); text-align: left;
  border-radius: 8px; padding: 7px 10px; font-size: 13.5px; cursor: pointer;
}
.model-item:hover { background: var(--bg2); }
.model-item.active { border-color: var(--accent); background: var(--bg2); }
.model-item .cnt { color: var(--dim); font-size: 12px; }
.model-item.unknown { color: var(--dim); font-style: italic; }

.graph-wrap {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  overflow: auto; min-height: 480px; position: relative;
}
.graph-wrap svg { display: block; }
.gnode { cursor: pointer; }
.gnode rect { fill: var(--bg2); stroke: var(--line); stroke-width: 1.5; }
.gnode text { fill: var(--text); font-size: 13px; }
.gnode .kind { fill: var(--dim); font-size: 10.5px; }
.gnode:hover rect { stroke: var(--accent); }
.gnode.selected rect { stroke: var(--accent); stroke-width: 2.5; }
.gnode.up rect { stroke: var(--teal); stroke-width: 2.5; }
.gnode.blast rect { stroke: var(--red); stroke-width: 2.5; }
.gnode.up.blast rect { stroke: var(--amber); stroke-width: 2.5; }
.gnode.unknown rect { stroke-dasharray: 6 4; }
.gedge { fill: none; stroke: #3a4268; stroke-width: 1.5; }
.gedge.up { stroke: var(--teal); stroke-width: 2.5; }
.gedge.blast { stroke: var(--red); stroke-width: 2.5; }
.graph-legend { display: flex; gap: 16px; padding: 10px 14px; font-size: 12.5px; color: var(--dim); flex-wrap: wrap; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; }
.dot.up { background: var(--teal); } .dot.blast { background: var(--red); } .dot.sel { background: var(--accent); }

/* right panel */
.col-row {
  display: flex; justify-content: space-between; align-items: center; width: 100%;
  background: none; border: 1px solid var(--line); color: var(--text);
  border-radius: 8px; padding: 7px 10px; font-size: 13.5px; cursor: pointer; margin-bottom: 6px;
}
.col-row:hover { border-color: var(--accent); }
.col-row.active { border-color: var(--accent); background: var(--bg2); }
.col-row .flags { display: flex; gap: 4px; }
.flag { font-size: 10px; padding: 2px 7px; border-radius: 999px; border: 1px solid var(--line); color: var(--dim); }
.flag.star { color: var(--amber); border-color: var(--amber); }
.flag.amb { color: var(--red); border-color: var(--red); }
.flag.unk { color: var(--dim); border-color: var(--dim); }
.panel-sec { margin-top: 16px; }
.panel-sec h4 { margin: 0 0 8px; font-size: 13px; }
.panel-sec h4 .teal { color: var(--teal); }
.panel-sec h4 .red { color: var(--red); }
.link-list { list-style: none; margin: 0; padding: 0; font-size: 13px; }
.link-list li { margin-bottom: 5px; }
.link-list button {
  background: none; border: none; color: var(--accent); cursor: pointer; font-size: 13px; padding: 0; text-align: left;
}
.link-list button:hover { text-decoration: underline; }
.link-list .unk { color: var(--dim); font-style: italic; }
.link-list .viastar { color: var(--amber); font-size: 11px; margin-left: 6px; }
.counts { display: flex; gap: 10px; margin: 8px 0; }
.count-box { flex: 1; background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; padding: 10px; text-align: center; }
.count-box .n { font-size: 22px; font-weight: 700; }
.count-box .l { font-size: 11.5px; color: var(--dim); }
.count-box.models .n { color: var(--red); }
.count-box.cols .n { color: var(--amber); }
.muted { color: var(--dim); font-size: 13px; }
.backlink { background: none; border: none; color: var(--dim); cursor: pointer; font-size: 13px; padding: 0; margin-bottom: 8px; }
.backlink:hover { color: var(--text); }

/* about */
.article { max-width: 760px; margin: 30px auto 60px; }
.article h2 { margin-top: 30px; }
.article h3 { margin-top: 24px; color: var(--accent); }
.article code { background: var(--bg2); padding: 2px 6px; border-radius: 6px; font-size: 13px; }
.article pre { background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; padding: 14px; overflow: auto; font-size: 13px; }

.site-footer { border-top: 1px solid var(--line); padding: 24px 0 40px; margin-top: 20px; }
.site-footer p { margin: 6px 0; font-size: 14px; color: var(--dim); }
[hidden] { display: none !important; }

/* Desktop app shell: each pane scrolls independently so the side panels
   never scroll away while the graph is scrolled. Sticky alone can't do
   this when the graph is shorter than the panels (zero stick travel). */
@media (min-width: 1101px) {
  #view-app {
    display: flex; flex-direction: column;
    height: calc(100vh - 72px); height: calc(100dvh - 72px);
    min-height: 480px;
  }
  .app { flex: 1; min-height: 0; padding-bottom: 14px; }
  .sidebar, .panel-right {
    position: static; max-height: none; min-height: 0;
    overflow-y: auto; overscroll-behavior: contain;
  }
  .graph-col { display: flex; flex-direction: column; min-height: 0; min-width: 0; }
  .graph-wrap { flex: 1; min-height: 0; }
  .graph-legend { flex: none; }
}