:root {
  --bg:           #0a0d14;
  --bg-elev:     #11151f;
  --bg-elev-2:   #161b28;
  --border:      #1f2638;
  --border-soft: #161b28;
  --text:        #e7ecf5;
  --text-dim:    #9aa3b8;
  --text-mute:   #5d6478;
  --accent:      #7c5cff;
  --accent-soft: #5a3fb822;

  --updates:    #ef5b73;
  --extends:    #4cc38a;
  --derives:    #a07cff;
  --doc-edge:   #4a5170;
  --similarity: #2d3346;

  --document:        #7d8aa5;
  --memory-latest:   #a4c8ff;
  --memory-old:      #5b6786;
  --inference:       #b89cff;
  --framework:       #f5c97a;
  --forgotten:       #ef5b73;
  --expiring:        #f5a83a;
  --new:             #4cc38a;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font: 13px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}
.hidden { display: none !important; }

/* ============== Auth ============== */
.auth {
  position: fixed; inset: 0;
  display: grid; place-items: center;
  background: radial-gradient(circle at 30% 30%, #1a1f2e 0%, var(--bg) 60%);
}
.auth-card {
  width: 360px;
  padding: 28px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 24px 80px rgba(0,0,0,.5);
}
.auth-card .brand { font-size: 18px; margin-bottom: 16px; }
.auth-card input {
  display: block; width: 100%;
  margin-top: 10px; padding: 10px 12px;
  background: var(--bg-elev-2); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); outline: none;
}
.auth-card input:focus { border-color: var(--accent); }
.auth-card button {
  margin-top: 14px; width: 100%;
  padding: 10px 14px;
  background: var(--accent); color: white; font-weight: 600;
  border: none; border-radius: 8px; cursor: pointer;
}
.auth-card .err {
  margin-top: 10px; color: var(--updates); min-height: 1em;
}
.muted { color: var(--text-dim); }

/* ============== Header / brand ============== */
.brand {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; letter-spacing: .04em;
}
.brand .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-soft);
  background: var(--bg-elev);
  z-index: 5; position: relative;
}
.header-controls {
  display: flex; align-items: center; gap: 8px;
}
.header-controls select,
.header-controls input,
.header-controls button {
  background: var(--bg-elev-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 7px 10px;
  border-radius: 8px;
  outline: none;
  font-size: 13px;
}
.header-controls input {
  width: 360px;
}
.header-controls input:focus { border-color: var(--accent); }
.header-controls button {
  cursor: pointer;
  background: var(--bg-elev-2);
}
.header-controls button:hover { border-color: var(--accent); }
#ask-btn {
  background: var(--accent);
  color: white;
  font-weight: 600;
  border-color: var(--accent);
}
#docs-toggle-label {
  display: flex; align-items: center; gap: 5px;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
#docs-toggle-label input[type=checkbox] {
  width: auto; padding: 0; border: none;
  accent-color: var(--accent);
  cursor: pointer;
}
#ask-btn:hover { filter: brightness(1.1); }

/* ============== Main split: graph + sidebar ============== */
main {
  position: absolute; inset: 50px 0 0 0;
  display: grid;
  grid-template-columns: 1fr 340px;
}
#cy {
  background:
    radial-gradient(circle at 30% 40%, #131826 0%, var(--bg) 70%),
    var(--bg);
  position: relative;
}

/* ============== Sidebar ============== */
aside#sidebar {
  border-left: 1px solid var(--border-soft);
  background: var(--bg-elev);
  overflow-y: auto;
}
.panel {
  border-bottom: 1px solid var(--border-soft);
}
.panel header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px;
  background: transparent;
  border: none;
  font-weight: 600;
  letter-spacing: .05em;
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  position: static;
  border-bottom: 1px solid var(--border-soft);
}
.panel .x {
  border: none; background: transparent; color: var(--text-mute);
  font-size: 18px; line-height: 1; cursor: pointer; padding: 0 4px;
}
.panel .x:hover { color: var(--text); }

.legend-body { padding: 6px 14px 14px; }
.legend-group { margin-top: 12px; }
.legend-label {
  font-size: 10px;
  color: var(--text-mute);
  letter-spacing: .15em;
  margin: 6px 0 8px;
}
.legend-row {
  display: flex; align-items: center; gap: 10px;
  padding: 3px 0;
  font-size: 12px;
}
.stat {
  display: flex; gap: 8px; align-items: baseline;
  padding: 3px 0;
  font-variant-numeric: tabular-nums;
}
.stat .ic { color: var(--text-mute); width: 14px; display: inline-block; }
.stat span:nth-child(2) {
  color: var(--text);
  font-weight: 600;
  min-width: 32px;
  display: inline-block;
}

.swatch {
  width: 14px; height: 14px; border-radius: 50%;
  display: inline-block;
  border: 1.5px solid;
}
.swatch.document     { background: transparent; border-color: var(--document);      border-radius: 3px; }
.swatch.memory-latest{ background: var(--memory-latest); border-color: var(--memory-latest); }
.swatch.memory-old   { background: var(--memory-old); border-color: var(--memory-old); opacity: .6; }
.swatch.inference    { background: var(--inference); border-color: var(--inference); }
.swatch.framework    { background: var(--framework); border-color: var(--framework); }

.badge {
  width: 16px; height: 16px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  font-size: 10px;
}
.badge.red    { background: var(--forgotten); color: #fff; }
.badge.yellow { background: var(--expiring); color: #1a1d2a; }
.badge.green  { background: var(--new); color: #1a1d2a; }

.line {
  width: 24px; height: 0;
  border-top: 2px solid;
  display: inline-block;
}
.line.updates    { border-top-color: var(--updates); }
.line.extends    { border-top-color: var(--extends); }
.line.derives    { border-top-color: var(--derives); }
.line.doc        { border-top-color: var(--doc-edge); border-top-style: solid; }
.line.similarity { border-top-color: var(--similarity); border-top-style: dashed; }

/* ============== Ask panel ============== */
.ask-answer {
  padding: 14px;
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
}
.citations { padding: 0 14px 14px; }
.citation {
  background: var(--bg-elev-2);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 8px 10px;
  margin-top: 6px;
  font-size: 12px;
  cursor: pointer;
  transition: border-color .12s;
}
.citation:hover { border-color: var(--accent); }
.citation .meta {
  display: flex; justify-content: space-between;
  font-size: 10px;
  color: var(--text-mute);
  margin-bottom: 4px;
}
.citation .index {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  width: 18px; height: 18px;
  border-radius: 50%;
  text-align: center;
  line-height: 18px;
  font-weight: 700;
  margin-right: 6px;
  font-size: 10px;
}

/* ============== Detail panel ============== */
#detail-body { padding: 12px 14px 16px; }
.detail-row {
  display: flex; justify-content: space-between;
  font-size: 12px;
  padding: 3px 0;
}
.detail-row .label {
  color: var(--text-mute);
}
.detail-content {
  background: var(--bg-elev-2);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 10px 0;
  line-height: 1.5;
  white-space: pre-wrap;
}
.chip {
  display: inline-block;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 11px;
  margin: 2px 4px 2px 0;
}
.chip.inference  { background: #2a1f4a; border-color: var(--inference); color: var(--inference); }
.chip.static     { background: #2a2f1f; border-color: var(--framework); color: var(--framework); }
.chip.framework  { background: #2a2410; border-color: var(--framework); color: var(--framework); }
.chip.forgotten  { background: #321920; border-color: var(--forgotten); color: var(--forgotten); }

.relation-list { margin: 8px 0; }
.relation-item {
  display: flex; gap: 6px; align-items: center;
  font-size: 12px; padding: 4px 0;
  border-top: 1px solid var(--border-soft);
}
.relation-tag {
  display: inline-block;
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: .05em;
  flex-shrink: 0;
  font-weight: 600;
}
.relation-tag.updates { background: var(--updates); color: white; }
.relation-tag.extends { background: var(--extends); color: #0a0d14; }
.relation-tag.derives { background: var(--derives); color: white; }

/* ============== Toast ============== */
.toast {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 10px;
  z-index: 100;
  font-size: 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
}
.toast.err { border-color: var(--forgotten); }

/* ============== Scrollbar ============== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #2d3346; }

/* small */
code {
  background: var(--bg-elev-2);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 11px;
  color: var(--accent);
}