:root {
  --bg: #0f1115;
  --panel: #161920;
  --panel-border: #272c36;
  --text: #e7e9ee;
  --text-dim: #93a0ac;
  --accent: #5b8def;
  --accent-soft: rgba(91, 141, 239, 0.18);
  --bridge: #e0a23a;
  --focus: #39b37e;
  --danger: #e2683c;
  --edge: #3a4150;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

#app {
  display: grid;
  grid-template-columns: 300px 1fr 340px;
  grid-template-rows: 1fr auto;
  height: 100vh;
}

/* ---------- sidebar ---------- */
#sidebar {
  grid-row: 1;
  border-right: 1px solid var(--panel-border);
  background: var(--panel);
  padding: 18px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

#brand h1 { font-size: 17px; margin: 0 0 2px 0; font-weight: 700; }
#brand .sub { color: var(--text-dim); font-size: 11px; }

#searchBox { position: relative; }
#searchInput {
  width: 100%;
  background: #1d212a;
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 11px;
  font-size: 13px;
}
#searchInput:focus { outline: none; border-color: var(--accent); }

#searchResults {
  position: absolute;
  top: 42px;
  left: 0;
  right: 0;
  z-index: 20;
  background: #1d212a;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  max-height: 320px;
  overflow-y: auto;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.result-row, .list-row {
  padding: 8px 10px;
  cursor: pointer;
  border-bottom: 1px solid var(--panel-border);
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: baseline;
}
.result-row:last-child, .list-row:last-child { border-bottom: none; }
.result-row:hover, .list-row:hover { background: var(--accent-soft); }
.result-title, .list-title { font-weight: 600; font-size: 12.5px; }
.result-sub, .list-sub { color: var(--text-dim); font-size: 11px; white-space: nowrap; }

#quickActions { display: flex; flex-direction: column; gap: 6px; }
.action-btn, .threshold-btn, #expandBtn, #backBtn {
  background: #1d212a;
  color: var(--text);
  border: 1px solid var(--panel-border);
  border-radius: 7px;
  padding: 8px 10px;
  font-size: 12.5px;
  cursor: pointer;
  text-align: left;
}
.action-btn:hover, .threshold-btn:hover, #expandBtn:hover, #backBtn:hover { background: #262b36; }
#resetBtn { color: var(--danger); border-color: rgba(226,104,60,0.4); }

.section-label { color: var(--text-dim); font-size: 10.5px; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 6px; }
#thresholdButtons { display: flex; gap: 6px; flex-wrap: wrap; }
.threshold-btn { flex: 1 1 auto; text-align: center; }
.threshold-btn.active { background: var(--accent-soft); border-color: var(--accent); color: #cfe0ff; }

#graphControls { display: flex; gap: 6px; }
#graphControls button { flex: 1; }

#sidebarList .list-header {
  color: var(--text-dim);
  font-size: 11px;
  margin: 2px 0 6px 0;
}
#sidebarList .list-explain {
  color: var(--text-dim);
  font-size: 11.5px;
  margin-bottom: 8px;
  line-height: 1.4;
}

.hidden { display: none !important; }

/* ---------- canvas ---------- */
#canvasWrap {
  grid-row: 1;
  position: relative;
  background: radial-gradient(circle at 25% 20%, #141821 0%, #0f1115 60%);
  overflow: hidden;
}

#homeScreen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 24px;
}
#homeScreen h2 { font-size: 24px; margin-bottom: 6px; }
.muted { color: var(--text-dim); font-size: 13px; }

#homeTeaserCard {
  margin-top: 32px;
  width: min(880px, 94%);
  background: linear-gradient(180deg, rgba(91,141,239,0.06), rgba(22,25,32,0.4));
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  padding: 10px 10px 16px 10px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
}
#homeTeaser { position: relative; overflow: hidden; width: 100%; height: min(480px, 56vh); cursor: default; text-align: left; }
#homeTeaserCaption {
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  margin-top: 6px;
}

#cy { position: absolute; inset: 0; }

#toast {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: #1d212a;
  border: 1px solid var(--bridge);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 12.5px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
}

/* ---------- detail panel ---------- */
#detailPanel {
  grid-row: 1;
  border-left: 1px solid var(--panel-border);
  background: var(--panel);
  padding: 18px;
  overflow-y: auto;
}

#detailContent h3 { font-size: 16px; margin: 0 0 2px 0; }
.category-badge {
  display: inline-block;
  background: var(--accent-soft);
  color: #cfe0ff;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  margin: 6px 0 10px 0;
}
.summary-line { font-size: 13px; margin: 8px 0; line-height: 1.5; }
.callout {
  font-size: 12px;
  padding: 8px 10px;
  border-radius: 7px;
  margin: 8px 0;
  background: rgba(224,162,58,0.12);
  border: 1px solid rgba(224,162,58,0.35);
  color: #f0c988;
}
.callout.community {
  background: rgba(91,141,239,0.12);
  border-color: rgba(91,141,239,0.35);
  color: #a9c6ff;
}

details.tech { margin-top: 12px; font-size: 12px; }
details.tech summary { cursor: pointer; color: var(--text-dim); }
details.tech table { width: 100%; margin-top: 8px; border-collapse: collapse; }
details.tech td { padding: 3px 0; border-bottom: 1px solid var(--panel-border); color: var(--text-dim); }
details.tech td.val { color: var(--text); text-align: right; }

.edge-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  margin: 8px 0;
  text-align: center;
}
.edge-row .node { flex: 1; }
.edge-arrow { color: var(--text-dim); }

button.link-btn {
  background: none;
  border: 1px solid var(--panel-border);
  color: var(--accent);
  border-radius: 7px;
  padding: 7px 10px;
  font-size: 12.5px;
  cursor: pointer;
  width: 100%;
  margin-top: 10px;
}
button.link-btn:hover { background: var(--accent-soft); }

.shared-reviewer-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid var(--panel-border);
  font-size: 12px;
  cursor: pointer;
}
.shared-reviewer-row:hover { color: var(--accent); }

.history-row {
  padding: 8px 0;
  border-bottom: 1px solid var(--panel-border);
  font-size: 12px;
}
.history-row .h-title { font-weight: 600; }
.history-row .h-meta { color: var(--text-dim); font-size: 11px; }

/* ---------- footer ---------- */
#graphSummaryBar {
  grid-row: 2;
  grid-column: 1 / 4;
  border-top: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text-dim);
  font-size: 11px;
  padding: 7px 16px;
  text-align: center;
}

@media (max-width: 900px) {
  #app { grid-template-columns: 1fr; grid-template-rows: auto 1fr auto auto; }
  #sidebar, #detailPanel { grid-row: auto; max-height: 220px; }
  #canvasWrap { grid-row: auto; min-height: 320px; }
}