:root {
  --bg: #f6f6f4;
  --panel: rgba(255, 255, 255, 0.92);
  --panel-border: #e2e2dc;
  --text: #1f2328;
  --muted: #6a7076;
  --accent: #b45309;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.09);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --panel: rgba(28, 31, 36, 0.94);
    --panel-border: #2c3038;
    --text: #e6e8ea;
    --muted: #9aa1a9;
    --accent: #fbbf24;
    --shadow: 0 4px 22px rgba(0, 0, 0, 0.45);
  }
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  height: 100%;
  font-family:
    ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  color: var(--text);
  background: var(--bg);
}
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ---- top bar ---- */
#topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid var(--panel-border);
  background: var(--panel);
  backdrop-filter: blur(6px);
  z-index: 20;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.brand .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(180, 83, 9, 0.15);
}
#post-deadline {
  align-self: center;
  margin-left: 0.5rem;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #bf360c;
  background: rgba(191, 54, 12, 0.1);
  border: 1px solid rgba(191, 54, 12, 0.35);
  border-radius: 999px;
  padding: 0.16rem 0.5rem;
  white-space: nowrap;
}
@media (prefers-color-scheme: dark) {
  #post-deadline {
    color: #f9683e;
    background: rgba(249, 104, 62, 0.12);
    border-color: rgba(249, 104, 62, 0.4);
  }
}
#title {
  font-weight: 650;
  font-size: 0.95rem;
  line-height: 1.1;
}
#subtitle {
  font-size: 0.76rem;
  color: var(--muted);
  max-width: 52ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.controls button,
.controls a,
.seg {
  font-size: 0.78rem;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--panel-border);
  border-radius: 7px;
  padding: 0.32rem 0.55rem;
  cursor: pointer;
  text-decoration: none;
}
.controls button:hover,
.controls a:hover {
  border-color: var(--accent);
}
.seg {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--muted);
  cursor: default;
}
.seg select {
  font-size: 0.78rem;
  color: var(--text);
  background: var(--bg);
  border: none;
  cursor: pointer;
}

/* ---- stage ---- */
#stage {
  position: relative;
  flex: 1;
  overflow: hidden;
}
#cy {
  position: absolute;
  inset: 0;
}

.panel {
  position: absolute;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 11px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(7px);
  z-index: 10;
}
.panel-h {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0.7rem 0.85rem 0.35rem;
  font-weight: 650;
}
.panel-h .hint {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
  opacity: 0.7;
}

/* legend */
#legend {
  left: 0.8rem;
  bottom: 0.8rem;
  width: 230px;
  padding-bottom: 0.7rem;
  max-height: calc(100vh - 120px);
  overflow: auto;
}
#legend-list {
  list-style: none;
  margin: 0;
  padding: 0 0.5rem;
}
#legend-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.24rem 0.35rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  user-select: none;
}
#legend-list li:hover {
  background: rgba(125, 125, 125, 0.1);
}
#legend-list li.off {
  opacity: 0.4;
}
#legend-list .swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex: none;
}
#legend-list .count {
  margin-left: auto;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 0.72rem;
}
.legend-note {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.4;
  margin: 0.15rem 0.85rem 0;
}
#edge-key {
  list-style: none;
  margin: 0;
  padding: 0 0.85rem 0.2rem;
}
#edge-key li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.45;
  margin: 0.2rem 0;
}
.ekey {
  width: 18px;
  height: 0;
  border-top: 3px solid var(--accent);
  flex: none;
}
.ekey[data-k="prior"] {
  border-top-color: #bf360c;
}
.ekey[data-k="ingroup"] {
  border-top-color: #78350f;
}
@media (prefers-color-scheme: dark) {
  .ekey[data-k="prior"] {
    border-top-color: #f9683e;
  }
  .ekey[data-k="ingroup"] {
    border-top-color: #fdba74;
  }
}

/* details */
#details {
  right: 0.8rem;
  top: 0.8rem;
  width: 340px;
  max-height: calc(100vh - 96px);
  overflow: auto;
  padding: 0.2rem 0 0.9rem;
}
#details.hidden,
#tooltip.hidden {
  display: none;
}
#details-close {
  position: sticky;
  top: 0.3rem;
  float: right;
  margin: 0.3rem 0.4rem 0 0;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
}
#details-body {
  padding: 0.4rem 0.95rem 0;
}
.d-type {
  display: inline-block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: #fff;
  padding: 0.12rem 0.45rem;
  border-radius: 5px;
}
.d-id {
  font-weight: 700;
  font-size: 0.95rem;
  margin: 0.5rem 0 0.15rem;
}
.d-title {
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--text);
}
.d-open {
  display: inline-block;
  margin-top: 0.6rem;
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--panel-border);
  border-radius: 7px;
  padding: 0.3rem 0.6rem;
}
.d-open:hover {
  border-color: var(--accent);
}
.d-sub {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  font-weight: 650;
  margin: 0.9rem 0 0.35rem;
}
.d-row {
  font-size: 0.8rem;
  margin: 0.2rem 0;
  color: var(--text);
}
.d-row .k {
  color: var(--muted);
}

/* prob bars */
.bar {
  position: relative;
  height: 20px;
  border-radius: 4px;
  background: rgba(125, 125, 125, 0.16);
  margin: 0.22rem 0;
  overflow: hidden;
}
.bar > span {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: 4px;
}
.bar > label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0.4rem;
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  mix-blend-mode: normal;
}
.bar > label b {
  font-weight: 600;
}
.lr-row {
  display: grid;
  grid-template-columns: 3.2rem 1fr;
  align-items: center;
  gap: 0.4rem;
  margin: 0.15rem 0;
}
.lr-row .lr-id {
  font-size: 0.74rem;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  cursor: pointer;
  text-align: right;
}
.lr-row.favors .lr-id {
  color: var(--accent);
  font-weight: 700;
}

/* tooltip */
#tooltip {
  position: absolute;
  z-index: 30;
  pointer-events: none;
  max-width: 320px;
  font-size: 0.78rem;
  line-height: 1.35;
  padding: 0.4rem 0.55rem;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  color: var(--text);
}
#tooltip .tt-id {
  font-weight: 700;
}
#tooltip .tt-meta {
  color: var(--muted);
  font-size: 0.72rem;
}