:root {
  color-scheme: light;
  --page: #f4f3ef;
  --surface: #fcfcfb;
  --surface-2: #f0efeb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --ink-3: #898781;
  --hairline: #e1e0d9;
  --border: rgba(11, 11, 11, 0.1);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.05), 0 8px 24px rgba(0, 0, 0, 0.08);

  --accent: #2a78d6;
  --accent-ink: #1c5cab;
  --accent-wash: #e6f0fc;
  --next: #eb6834;

  --fill-unstudied: #e4e2db;
  --fill-studied: #2a78d6;
  --fill-other: #c9c7bf;
  --fill-top: #1c5cab;
  --fill-also: #86b6ef;
  --state-edge: #fcfcfb;
  --label-on-light: #2b2a28;
  --label-on-dark: #ffffff;
  --route: #52514e;

  --font: system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Status colors are the same in both themes and always come with an icon and text. */
  --good: #0ca30c;
  --bad: #d03b3b;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #111110;
    --surface: #1a1a19;
    --surface-2: #232321;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --ink-3: #898781;
    --hairline: #2c2c2a;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.5);

    --accent: #3987e5;
    --accent-ink: #86b6ef;
    --accent-wash: #16263a;
    --next: #d95926;

    --fill-unstudied: #2c2c2a;
    --fill-studied: #3987e5;
    --fill-other: #45453f;
    --fill-top: #6da7ec;
    --fill-also: #1c5cab;
    --state-edge: #111110;
    --label-on-light: #d8d7cf;
    --label-on-dark: #0b0b0b;
    --route: #c3c2b7;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #111110;
  --surface: #1a1a19;
  --surface-2: #232321;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --ink-3: #898781;
  --hairline: #2c2c2a;
  --border: rgba(255, 255, 255, 0.1);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.5);

  --accent: #3987e5;
  --accent-ink: #86b6ef;
  --accent-wash: #16263a;
  --next: #d95926;

  --fill-unstudied: #2c2c2a;
  --fill-studied: #3987e5;
  --fill-other: #45453f;
  --fill-top: #6da7ec;
  --fill-also: #1c5cab;
  --state-edge: #111110;
  --label-on-light: #d8d7cf;
  --label-on-dark: #0b0b0b;
  --route: #c3c2b7;
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background: var(--page);
  color: var(--ink);
  font: 15px/1.5 var(--font);
  -webkit-font-smoothing: antialiased;
  display: grid;
  grid-template-rows: auto 1fr;
  height: 100vh;
  height: 100dvh;
}

button { font: inherit; color: inherit; }

a { color: var(--accent-ink); }

/* ---------- Top bar ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--hairline);
  background: var(--surface);
}

.brand h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 0;
  font-size: 13px;
  color: var(--ink-2);
}

.progress {
  display: grid;
  gap: 6px;
  width: min(360px, 45vw);
}

.progress-count {
  font-size: 13px;
  color: var(--ink-2);
  text-align: right;
}

.progress-count strong {
  color: var(--ink);
  font-weight: 650;
}

.progress-bar {
  display: flex;
  gap: 2px;
  height: 8px;
}

.progress-seg {
  position: relative;
  border-radius: 2px;
  background: var(--fill-unstudied);
  overflow: hidden;
}

.progress-seg > span {
  position: absolute;
  inset: 0 auto 0 0;
  background: var(--accent);
}

/* ---------- Layout ---------- */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 400px;
  min-height: 0;
}

.map-area {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  padding: 14px 20px 16px;
  gap: 10px;
}

.panel {
  min-height: 0;
  overflow-y: auto;
  background: var(--surface);
  border-left: 1px solid var(--hairline);
  padding: 22px 24px 40px;
}

/* ---------- Toolbar ---------- */

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.industry-select {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-2);
}

.industry-select select {
  font: inherit;
  font-size: 13.5px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 28px 5px 10px;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-2) 50%), linear-gradient(135deg, var(--ink-2) 50%, transparent 50%);
  background-position: calc(100% - 15px) 55%, calc(100% - 10px) 55%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  cursor: pointer;
}

.industry-select select.is-active {
  border-color: var(--accent-ink);
  box-shadow: 0 0 0 1px var(--accent-ink);
}

.toggles {
  display: flex;
  gap: 14px;
  flex-shrink: 0;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: var(--ink-2);
  cursor: pointer;
  user-select: none;
}

.toggle input { accent-color: var(--accent); margin: 0; }

/* ---------- Map ---------- */

.map-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  overflow: hidden;
}

#map {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: pan-x pan-y;
}

.state {
  fill: var(--fill-unstudied);
  stroke: var(--state-edge);
  stroke-width: 0.9px;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
  cursor: pointer;
  transition: fill 160ms ease;
}

.state.tone-studied { fill: var(--fill-studied); }
.state.tone-top { fill: var(--fill-top); }
.state.tone-also { fill: var(--fill-also); }
.state.tone-other { fill: var(--fill-other); }
.state.tone-quiz-target { fill: var(--accent); }
.state.tone-quiz-right { fill: var(--good); }
.state.tone-quiz-wrong { fill: var(--bad); }

.outline {
  fill: none;
  pointer-events: none;
  vector-effect: non-scaling-stroke;
  stroke-linejoin: round;
}

.outline.hover { stroke: var(--ink); stroke-width: 1.5px; }
.outline.selected { stroke: var(--ink); stroke-width: 2.5px; }
.outline.next { stroke: var(--next); stroke-width: 2px; stroke-dasharray: 5 3; }

.labels text {
  font-family: var(--font);
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: central;
  pointer-events: none;
  fill: var(--label-on-light);
  paint-order: stroke;
  stroke: transparent;
  letter-spacing: 0.02em;
}

.labels text.on-dark { fill: var(--label-on-dark); }

.callouts line {
  stroke: var(--ink-3);
  vector-effect: non-scaling-stroke;
  stroke-width: 0.75px;
}

.callouts text {
  font-family: var(--font);
  font-weight: 600;
  dominant-baseline: central;
  fill: var(--ink-2);
  cursor: pointer;
}

.callouts .dot {
  stroke: var(--state-edge);
  vector-effect: non-scaling-stroke;
  stroke-width: 1px;
  cursor: pointer;
}

.callouts .hit { fill: transparent; cursor: pointer; }

.route-line {
  fill: none;
  stroke: var(--route);
  stroke-width: 1.25px;
  stroke-dasharray: 2 3;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
  opacity: 0.7;
}

.route-line.done {
  stroke: var(--next);
  stroke-dasharray: none;
  stroke-width: 2px;
  opacity: 1;
}

.tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 12.5px;
  line-height: 1.4;
  max-width: 240px;
  z-index: 5;
}

.tooltip .tt-name { font-weight: 650; font-size: 13.5px; }
.tooltip .tt-meta { color: var(--ink-2); }
.tooltip .tt-status { margin-top: 4px; }

.zoom-controls {
  position: absolute;
  right: 10px;
  bottom: 10px;
  display: grid;
  gap: 4px;
}

.zoom-controls button {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
}

.zoom-controls button:hover { background: var(--surface-2); }

/* ---------- Legend ---------- */

.legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 18px;
  font-size: 12.5px;
  color: var(--ink-2);
  min-height: 20px;
}

.legend-item { display: inline-flex; align-items: center; gap: 6px; }

.swatch {
  width: 14px;
  height: 10px;
  border-radius: 2px;
  display: inline-block;
}

.swatch.next {
  background: transparent;
  border: 2px dashed var(--next);
  height: 12px;
}

.legend-note { color: var(--ink-3); }

/* ---------- Panel ---------- */

.panel h2 {
  margin: 0;
  font-size: 26px;
  line-height: 1.15;
  font-weight: 650;
  letter-spacing: -0.015em;
}

.panel h3 {
  margin: 28px 0 4px;
  font-size: 13px;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-2);
}

.panel .section-note {
  margin: 0 0 12px;
  font-size: 12.5px;
  color: var(--ink-3);
}

.kicker {
  font-size: 12.5px;
  color: var(--ink-2);
  margin-bottom: 4px;
}

.code-badge {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 6px;
  border-radius: 5px;
  background: var(--surface-2);
  color: var(--ink-2);
  font-size: 13px;
  font-weight: 600;
  vertical-align: 4px;
  letter-spacing: 0.04em;
}

.nickname {
  margin: 4px 0 0;
  color: var(--ink-2);
  font-style: italic;
}

.back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin: -4px 0 14px -6px;
  padding: 3px 6px;
  border: 0;
  border-radius: 6px;
  background: none;
  color: var(--ink-2);
  font-size: 13px;
  cursor: pointer;
}

.back:hover { background: var(--surface-2); color: var(--ink); }

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin: 18px 0 0;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  overflow: hidden;
}

.fact {
  background: var(--surface);
  padding: 9px 12px;
}

.fact dt {
  font-size: 11.5px;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.fact dd {
  margin: 1px 0 0;
  font-size: 15px;
  font-weight: 600;
}

.fact dd .sub { font-weight: 400; color: var(--ink-2); font-size: 13px; }

.one-liner {
  margin: 18px 0 0;
  padding: 10px 14px;
  border-left: 3px solid var(--accent);
  background: var(--accent-wash);
  border-radius: 0 8px 8px 0;
  font-size: 15px;
}

.one-liner .label {
  display: block;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-2);
  margin-bottom: 2px;
}

.specialty {
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 10px;
}

.specialty-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.specialty-name {
  font-weight: 650;
  font-size: 15.5px;
  line-height: 1.3;
}

.cat-tag {
  display: inline-block;
  margin-top: 3px;
  font-size: 11.5px;
  color: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0 7px;
  cursor: pointer;
  background: none;
}

.cat-tag:hover { background: var(--surface-2); }

.lq {
  text-align: right;
  flex-shrink: 0;
}

.lq-value {
  font-size: 20px;
  font-weight: 650;
  line-height: 1.1;
}

.lq-label {
  font-size: 11px;
  color: var(--ink-3);
}

.specialty p {
  margin: 8px 0 0;
  font-size: 14px;
  color: var(--ink);
}

.specialty .meta {
  margin-top: 6px;
  font-size: 13px;
  color: var(--ink-2);
}

.specialty .meta b { font-weight: 600; color: var(--ink); }

.bars { display: grid; gap: 10px; }

.bar-row .bar-label {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 13.5px;
  margin-bottom: 3px;
}

.bar-row .bar-value {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.bar-row .bar-us {
  color: var(--ink-3);
  font-weight: 400;
  margin-left: 6px;
}

.bar-track {
  position: relative;
  height: 8px;
  background: var(--surface-2);
  border-radius: 4px;
}

.bar-fill {
  position: absolute;
  inset: 0 auto 0 0;
  background: var(--accent);
  border-radius: 4px;
}

.bar-us-mark {
  position: absolute;
  top: -3px;
  bottom: -3px;
  width: 2px;
  margin-left: -1px;
  background: var(--ink);
  border-radius: 1px;
}

.bar-legend {
  display: flex;
  gap: 14px;
  font-size: 12px;
  color: var(--ink-3);
  margin-top: 10px;
}

.bar-legend .mark {
  display: inline-block;
  width: 2px;
  height: 10px;
  background: var(--ink);
  vertical-align: -1px;
  margin-right: 5px;
}

.plain-list {
  margin: 0;
  padding-left: 18px;
  font-size: 14px;
}

.plain-list li + li { margin-top: 4px; }

.neighbors {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.neighbor {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 13px;
  cursor: pointer;
}

.neighbor:hover { background: var(--surface-2); }
.neighbor.is-studied { border-color: var(--accent); }

.guess {
  font-size: 14px;
  color: var(--ink-2);
  font-style: italic;
  margin: 0;
}

.sources {
  margin: 0;
  padding-left: 18px;
  font-size: 12.5px;
  color: var(--ink-2);
}

.empty-note {
  margin: 14px 0 0;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--ink-2);
  font-size: 14px;
}

/* Route overview */

.next-card {
  margin: 16px 0 6px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--next);
  border-radius: 0 10px 10px 0;
  background: var(--surface);
}

.next-card .label {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-2);
}

.next-card .name {
  font-size: 20px;
  font-weight: 650;
  margin-top: 2px;
}

.next-card .meta {
  font-size: 13px;
  color: var(--ink-2);
}

.next-card button {
  margin-top: 10px;
  border: 0;
  border-radius: 7px;
  background: var(--ink);
  color: var(--surface);
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.division { margin-top: 20px; }

.division-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 4px;
  margin-bottom: 4px;
}

.division-name { font-weight: 650; font-size: 14px; }

.division-meta {
  font-size: 12.5px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

.route-list { list-style: none; margin: 0; padding: 0; }

.route-item {
  display: grid;
  grid-template-columns: 26px 1fr auto;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 5px 6px;
  border: 0;
  border-radius: 6px;
  background: none;
  text-align: left;
  font-size: 14px;
  cursor: pointer;
}

.route-item:hover { background: var(--surface-2); }

.route-num {
  font-size: 12px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.route-code {
  font-size: 12px;
  color: var(--ink-3);
  margin-left: 4px;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--ink-3);
}

.status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--ink-3);
}

.status.done { color: var(--ink-2); }
.status.done::before { background: var(--accent); border-color: var(--accent); }
.status.next { color: var(--next); font-weight: 600; }
.status.next::before { border: 1.5px dashed var(--next); }

.intro {
  margin: 6px 0 0;
  color: var(--ink-2);
  font-size: 14px;
}

.filter-item {
  display: block;
  width: 100%;
  text-align: left;
  border: 1px solid var(--hairline);
  background: var(--surface);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 8px;
  cursor: pointer;
}

.filter-item:hover { background: var(--surface-2); }

.filter-item .top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-weight: 650;
}

.filter-item .top .lq-inline {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.filter-item .what { font-size: 13.5px; color: var(--ink-2); }

.rank-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-2);
  margin-left: 6px;
}

/* ---------- Quiz ---------- */

.quiz-toggle {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.quiz-toggle:hover { background: var(--surface-2); }

.quiz-toggle[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--surface);
}

.toggle:has(input:disabled),
.industry-select:has(select:disabled) { opacity: 0.45; cursor: default; }

.quiz-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 8px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  line-height: 1.35;
}

.quiz-banner[hidden] { display: none; }

.quiz-banner .q-num {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

.quiz-banner .q-text { flex: 1; font-weight: 600; }

.icon { font-weight: 700; margin-right: 6px; }
.icon.good { color: var(--good); }
.icon.bad { color: var(--bad); }

.banner-next {
  flex-shrink: 0;
  border: 0;
  border-radius: 7px;
  background: var(--ink);
  color: var(--surface);
  padding: 5px 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.seg { display: flex; gap: 6px; flex-wrap: wrap; }

.seg-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13.5px;
  cursor: pointer;
}

.seg-btn[aria-pressed="true"] {
  border-color: var(--accent-ink);
  box-shadow: 0 0 0 1px var(--accent-ink);
  font-weight: 600;
}

.seg-btn:disabled { opacity: 0.45; cursor: default; }

.quiz-note { margin-top: 8px; }

.quiz-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin-top: 18px;
}

.primary-btn {
  border: 0;
  border-radius: 8px;
  background: var(--ink);
  color: var(--surface);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.link-btn {
  border: 0;
  background: none;
  padding: 4px 0;
  color: var(--ink-2);
  font-size: 13px;
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}

.key-hint { font-size: 12px; color: var(--ink-3); }

.quiz-dots { display: flex; gap: 4px; margin: 10px 0 18px; }

.quiz-dot {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--surface-2);
}

.quiz-dot.current { background: var(--ink-3); }
.quiz-dot.right { background: var(--good); }
.quiz-dot.wrong { background: var(--bad); }

.quiz-prompt {
  font-size: 20px;
  font-weight: 650;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.quiz-hint { margin: 8px 0 0; font-size: 13.5px; color: var(--ink-2); }

.quiz-options { display: grid; gap: 8px; margin-top: 14px; }

.quiz-option {
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 15px;
  cursor: pointer;
}

.quiz-option:hover:not(:disabled) { background: var(--surface-2); }
.quiz-option:disabled { cursor: default; color: var(--ink); }
.quiz-option.right { border-color: var(--good); box-shadow: 0 0 0 1px var(--good); }
.quiz-option.wrong { border-color: var(--bad); box-shadow: 0 0 0 1px var(--bad); }

.quiz-option .key {
  font-size: 11.5px;
  color: var(--ink-3);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0 5px;
}

.quiz-feedback {
  margin-top: 16px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--surface-2);
  font-size: 14.5px;
}

.quiz-score {
  font-size: 44px;
  font-weight: 650;
  line-height: 1.1;
  margin-top: 4px;
}

.quiz-score span { font-size: 22px; color: var(--ink-3); font-weight: 500; }

/* ---------- Narrow screens ---------- */

@media (max-width: 960px) {
  body { display: block; height: auto; }

  .topbar {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 12px 16px;
  }

  .progress { width: 100%; }
  .progress-count { text-align: left; }

  .layout { display: block; }

  .map-area { padding: 12px 16px; }

  .toolbar { flex-wrap: wrap; gap: 10px; }

  .map-wrap { flex: none; aspect-ratio: 1080 / 604; }

  .panel {
    border-left: 0;
    border-top: 1px solid var(--hairline);
    padding: 20px 16px 48px;
  }
}