/* Dark, low-glare palette modelled on VS Code "Dark Modern"; colour is reserved for status. */
:root {
  color-scheme: dark;
  --bg: #1f1f1f;          /* editor */
  --surface: #252526;     /* cards */
  --bar: #181818;         /* top bar, side panel */
  --input: #313131;
  --ink: #cccccc;
  --strong: #e7e7e7;
  --muted: #9d9d9d;
  --line: #3c3c3c;
  --soft: #2d2d2d;
  --grid: #2a2a2a;
  /* VS Code blues for lines and borders (never for text). */
  --wire: #2f5d8a;
  --link: #3c8ad6;
  --card-line: #33465a;
  --accent: #0e639c;      /* VS Code button blue */
  --accent-hover: #1177bb;
  --focus: #0078d4;
  --done: #73c991;
  --progress: #cca700;
  --todo: #858585;
  --blocked: #f14c4c;
  --proposed: #b180d7;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; background: var(--bg); }
button, input, textarea { font: inherit; color: inherit; }
button {
  border: 1px solid var(--accent); background: var(--accent); color: #fff;
  border-radius: 6px; padding: 6px 12px; cursor: pointer;
}
button:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
button.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
button.ghost:hover { background: var(--soft); border-color: var(--line); }
button:disabled { opacity: .5; cursor: default; }
input, textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 6px; padding: 7px 9px; background: var(--input);
}
input::placeholder, textarea::placeholder { color: #8a8a8a; }
input:focus, textarea:focus, button:focus-visible { outline: 1px solid var(--focus); outline-offset: 0; border-color: var(--focus); }

/* ---------- login ---------- */
.login-page { display: grid; place-items: center; padding: 16px; }
.login-card {
  width: min(360px, 100%); background: var(--surface); border: 1px solid var(--card-line); border-top: 2px solid var(--focus);
  border-radius: 10px; padding: 28px; display: grid; gap: 14px;
}
.login-card h1 { margin: 0 0 6px; font-size: 20px; font-weight: 600; color: var(--strong); }
.login-card label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
.form-error { min-height: 18px; margin: 0; color: var(--blocked); font-size: 13px; }

/* ---------- top bar ---------- */
body { display: flex; flex-direction: column; }
.topbar {
  display: flex; align-items: center; gap: 16px; padding: 10px 16px;
  background: var(--bar); border-bottom: 1px solid var(--line); box-shadow: inset 0 -1px 0 var(--focus); flex-wrap: wrap;
}
.crumbs { display: flex; align-items: center; gap: 10px; font-size: 16px; font-weight: 600; min-width: 0; color: var(--strong); }
.crumbs button { padding: 4px 10px; font-weight: 500; font-size: 14px; }
.crumbs .sep { color: var(--line); font-weight: 400; }
.overall { display: flex; align-items: center; gap: 8px; }
.bar { width: 120px; height: 6px; border-radius: 3px; background: var(--soft); overflow: hidden; }
.bar span { display: block; height: 100%; width: 0; background: var(--done); }
.overall strong { font-size: 14px; font-variant-numeric: tabular-nums; color: var(--strong); }
.search { position: relative; margin-left: auto; width: 220px; }
.search-results {
  position: absolute; top: 38px; left: 0; right: 0; z-index: 20; list-style: none; margin: 0; padding: 4px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 6px; max-height: 320px; overflow: auto;
}
.search-results li { padding: 7px 8px; border-radius: 4px; cursor: pointer; font-size: 14px; }
.search-results li:hover, .search-results li.active { background: #04395e; }
.search-results small { display: block; color: var(--muted); font-size: 12px; }
.updated { font-size: 12px; color: var(--muted); white-space: nowrap; }

/* ---------- stage ---------- */
.stage { position: relative; flex: 1; min-height: 0; overflow: hidden; }
.canvas { width: 100%; height: 100%; display: block; cursor: grab; touch-action: none; user-select: none; }
.canvas.dragging { cursor: grabbing; }
.grid-line { fill: none; stroke: var(--grid); stroke-width: 1; }
.view-tools { position: absolute; top: 12px; left: 12px; display: grid; gap: 6px; }
.view-tools button { width: 34px; height: 34px; padding: 0; background: var(--surface); color: var(--ink); border-color: var(--card-line); font-size: 16px; }
.view-tools button:hover { background: var(--soft); }
.legend {
  position: absolute; left: 12px; bottom: 12px; display: flex; gap: 12px; flex-wrap: wrap; margin: 0; padding: 6px 10px;
  list-style: none; background: rgba(24, 24, 24, .92); border: 1px solid var(--line); border-radius: 6px; font-size: 12px;
}
.legend li { display: flex; align-items: center; gap: 5px; color: var(--muted); }

/* ---------- graph ---------- */
.layer-label { font-size: 15px; font-weight: 600; fill: #3794ff; text-transform: uppercase; letter-spacing: .08em; }
.card { cursor: pointer; }
.card rect.box { fill: var(--surface); stroke: var(--card-line); stroke-width: 1.2; }
.card:hover rect.box { stroke: var(--link); }
.card.selected rect.box { stroke: var(--focus); stroke-width: 2; }
.card.proposed rect.box { stroke: var(--proposed); stroke-dasharray: 5 4; }
.card rect.edge { stroke: none; }
.card .title { font-size: 14px; font-weight: 600; fill: var(--strong); }
.card.component .title { font-size: 16px; }
.card .sub { font-size: 12px; fill: var(--muted); }
.card .badge { font-size: 11px; fill: var(--muted); }
.card .track { fill: var(--soft); }
.card .fill { fill: var(--done); }
.card.match rect.box { stroke: var(--focus); stroke-width: 2.5; }
.toggle circle { fill: var(--surface); stroke: var(--wire); }
.toggle:hover circle { stroke: var(--focus); }
.toggle text { font-size: 12px; fill: var(--ink); text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.toggle { cursor: pointer; }
.more rect { fill: var(--soft); stroke: var(--wire); stroke-dasharray: 3 3; }
.more text { font-size: 13px; fill: var(--muted); }
.more { cursor: pointer; }

.wire { fill: none; stroke: var(--wire); stroke-width: 1.4; }
.link { fill: none; stroke: var(--link); stroke-width: 1.6; }
.link.pending { stroke-dasharray: 6 5; }
.link.selected { stroke: var(--focus); stroke-width: 2.4; }
.link-hit { fill: none; stroke: transparent; stroke-width: 14; cursor: pointer; }
.arrow-head { fill: var(--link); }
.link-label { cursor: pointer; }
.link-label rect { fill: var(--bg); stroke: var(--wire); }
.host-frame { fill: rgba(55, 148, 255, .035); stroke: var(--wire); stroke-width: 1.2; stroke-dasharray: 7 5; }
.host-label { font-size: 14px; font-weight: 600; fill: var(--muted); letter-spacing: .02em; }
.link-label text { font-size: 11px; fill: var(--muted); text-anchor: middle; dominant-baseline: central; }
.dep { fill: none; stroke: var(--proposed); stroke-width: 1.4; stroke-dasharray: 4 4; }

.s-done { fill: var(--done); color: var(--done); }
.s-in_progress { fill: var(--progress); color: var(--progress); }
.s-todo { fill: var(--todo); color: var(--todo); }
.s-blocked { fill: var(--blocked); color: var(--blocked); }
.s-proposed { fill: var(--proposed); color: var(--proposed); }
.s-dropped { fill: var(--todo); color: var(--todo); }

/* ---------- side panel ---------- */
.panel {
  position: absolute; top: 0; right: 0; bottom: 0; width: 380px; max-width: 100%;
  background: var(--bar); border-left: 1px solid var(--line); overflow-y: auto; padding: 18px 18px 28px;
}
.panel-close { position: absolute; top: 10px; right: 10px; padding: 2px 8px; }
.panel h2 { margin: 0 34px 6px 0; font-size: 18px; line-height: 1.3; color: var(--strong); }
.panel .path { font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.status-chip { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; }
.panel section { border-top: 1px solid var(--soft); padding-top: 12px; margin-top: 14px; }
.panel h3 { margin: 0 0 8px; font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .06em; }
.panel .note { white-space: pre-wrap; font-size: 14px; line-height: 1.55; margin: 10px 0 0; }
.panel ul.plain { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: 14px; }
.panel a, .linkish { color: #3794ff; text-decoration: none; cursor: pointer; background: none; border: 0; padding: 0; }
.panel a:hover, .linkish:hover { text-decoration: underline; background: none; }
.meta { font-size: 12px; color: var(--muted); margin-top: 8px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.inline-form { display: grid; gap: 8px; margin-top: 10px; }
.inline-form .row { display: flex; gap: 8px; }
.comment { font-size: 14px; padding: 8px 0; border-bottom: 1px solid var(--soft); }
.comment header { display: flex; justify-content: space-between; gap: 8px; font-size: 12px; color: var(--muted); }
.comment header strong { color: var(--strong); }
.comment p { margin: 4px 0 0; white-space: pre-wrap; }
.comment .linkish { font-size: 12px; color: var(--muted); }
details.history summary { cursor: pointer; font-size: 13px; color: var(--muted); }
details.history li { font-size: 12px; color: var(--muted); }
.warn { color: var(--blocked); font-size: 13px; }

.toast {
  position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%); z-index: 30;
  background: var(--surface); color: var(--strong); border: 1px solid var(--line); border-radius: 6px; padding: 8px 12px; font-size: 14px;
  display: flex; gap: 12px; align-items: center; box-shadow: 0 4px 16px rgba(0, 0, 0, .4);
}
.toast button { padding: 2px 8px; }

@media (max-width: 760px) {
  .topbar { gap: 10px; padding: 8px 12px; flex-wrap: wrap; }
  .crumbs { flex: 1; min-width: 0; font-size: 15px; }
  .crumbs > * { white-space: nowrap; }
  .crumbs > span:last-child { overflow: hidden; text-overflow: ellipsis; }
  .overall .bar { display: none; }
  .search { order: 5; width: 100%; margin-left: 0; }
  .updated { display: none; }
  #logout { padding: 4px 10px; }
  .panel { top: auto; height: 62%; width: 100%; border-left: 0; border-top: 1px solid var(--line); border-radius: 10px 10px 0 0; }
  /* Cards already spell out their status in words; the legend would only crowd the screen. */
  .legend { display: none; }
}