:root {
  --bg: #091321;
  --bg-deep: #13263d;
  --panel: rgba(14, 27, 44, 0.76);
  --panel-strong: rgba(18, 35, 56, 0.92);
  --panel-soft: rgba(20, 39, 62, 0.82);
  --ink: #f4f7ff;
  --muted: rgba(231, 238, 255, 0.76);
  --line: rgba(255, 255, 255, 0.08);
  --navy: #102c46;
  --teal: #1aa89d;
  --sky: #6b8ec6;
  --coral: #ef8c59;
  --amber: #d9a64f;
  --violet: #7a70d8;
  --dark: #0c1728;
  --dark-2: #13263d;
  --dark-3: #183653;
  --light-ink: #f4f7ff;
  --light-muted: rgba(231, 238, 255, 0.74);
  --shadow: 0 30px 80px rgba(6, 12, 24, 0.3);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

#top,
#explorer,
#atlas,
#graph,
#chart-cases {
  scroll-margin-top: 18px;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(circle at 50% -8%, rgba(26, 168, 157, 0.22), transparent 26%),
    radial-gradient(circle at 100% 14%, rgba(107, 142, 198, 0.18), transparent 24%),
    radial-gradient(circle at 0% 60%, rgba(239, 140, 89, 0.12), transparent 24%),
    linear-gradient(180deg, #091321 0%, #13263d 38%, #102236 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 100% 36px, 36px 100%;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 12%, rgba(129, 226, 216, 0.1), transparent 20%),
    radial-gradient(circle at 84% 22%, rgba(122, 112, 216, 0.12), transparent 22%);
}

.shell {
  width: min(1500px, calc(100vw - 28px));
  margin: 14px auto 60px;
  position: relative;
  z-index: 1;
}

.shell::before {
  content: "";
  position: absolute;
  inset: 120px 3% 40px;
  border-radius: 56px;
  background:
    radial-gradient(circle at 50% 0%, rgba(129, 226, 216, 0.06), transparent 34%),
    linear-gradient(180deg, rgba(16, 34, 54, 0.08), rgba(16, 34, 54, 0.02));
  pointer-events: none;
}

.panel {
  min-width: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04)),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero,
.narrative-band,
.explorer-panel,
.atlas-header,
.chart-panel {
  position: relative;
  isolation: isolate;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(2.8rem, 5.5vw, 5.2rem);
  line-height: 0.92;
  max-width: 12ch;
}

h2 {
  font-size: clamp(1.7rem, 2.1vw, 2.8rem);
  line-height: 1.02;
}

h3 {
  font-size: clamp(1.35rem, 1.6vw, 1.8rem);
  line-height: 1.05;
}

p {
  line-height: 1.6;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.76rem;
  font-weight: 700;
}

.section-head {
  margin-bottom: 18px;
}

.section-head.compact {
  margin-bottom: 14px;
}

.lead,
.note-copy,
.field span,
.hero-stat span,
.insight-card p,
.quality-stat p,
.bridge-item p,
.candidate-row p,
.detail-card p,
.path-card p {
  color: var(--muted);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
  gap: 20px;
  padding: 34px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 2%, rgba(107, 142, 198, 0.16), transparent 28%),
    radial-gradient(circle at 2% 98%, rgba(26, 168, 157, 0.12), transparent 24%),
    linear-gradient(180deg, rgba(14, 28, 46, 0.96), rgba(10, 22, 38, 0.98));
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -26% auto;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(122, 112, 216, 0.12), transparent 68%);
  pointer-events: none;
}

.hero-main {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.lead {
  margin: 0;
  max-width: 720px;
  font-size: 1.04rem;
}

.overview-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.hero-stat {
  padding: 18px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-stat strong {
  display: block;
  margin-bottom: 8px;
  font-size: 2.05rem;
  line-height: 1;
}

.hero-side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.hero-preview {
  padding: 22px;
  border-radius: 28px;
  background:
    radial-gradient(circle at 100% 0%, rgba(26, 168, 157, 0.16), transparent 32%),
    radial-gradient(circle at 0% 100%, rgba(107, 142, 198, 0.16), transparent 28%),
    linear-gradient(180deg, rgba(18, 35, 56, 0.98), rgba(12, 24, 40, 0.98));
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--light-ink);
  box-shadow: 0 28px 70px rgba(12, 23, 40, 0.24);
}

.hero-preview .eyebrow {
  color: #81e2d8;
}

.hero-preview .note-copy {
  color: var(--light-muted);
}

.hero-preview-copy {
  margin-bottom: 14px;
}

.hero-preview h2 {
  color: var(--light-ink);
}

.hero-visual {
  min-height: 270px;
  padding: 10px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.note-card {
  padding: 24px;
  border-radius: 28px;
  background:
    radial-gradient(circle at 100% 0%, rgba(239, 140, 89, 0.12), transparent 26%),
    linear-gradient(180deg, rgba(18, 35, 56, 0.88), rgba(13, 26, 43, 0.88));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.summary-chips,
.ego-meta,
.bridge-meta,
.candidate-meta,
.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(129, 226, 216, 0.1);
  border: 1px solid rgba(129, 226, 216, 0.22);
  color: #c5fbf5;
  font-size: 0.84rem;
  line-height: 1.2;
}

.chip.alt {
  background: rgba(217, 166, 79, 0.14);
  border-color: rgba(217, 166, 79, 0.2);
  color: #ffd48a;
}

.chip.blue {
  background: rgba(107, 142, 198, 0.16);
  border-color: rgba(107, 142, 198, 0.22);
  color: #d2e2ff;
}

.narrative-band {
  margin-top: 18px;
  padding: 26px;
  color: var(--light-ink);
  background:
    radial-gradient(circle at 0% 0%, rgba(26, 168, 157, 0.12), transparent 24%),
    radial-gradient(circle at 100% 100%, rgba(107, 142, 198, 0.1), transparent 22%),
    linear-gradient(180deg, rgba(15, 30, 48, 0.96), rgba(11, 24, 40, 0.96));
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 28px 70px rgba(12, 23, 40, 0.22);
}

.narrative-band .eyebrow {
  color: #81e2d8;
}

.narrative-band h2,
.atlas-header h2,
.chart-panel h2 {
  color: var(--light-ink);
}

.narrative-band .insight-card,
.atlas-header .quality-stat,
.chart-panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.05));
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.narrative-band .insight-card p,
.atlas-header .note-copy,
.atlas-header .quality-stat p {
  color: var(--light-muted);
}

.narrative-band .insight-index {
  background: rgba(129, 226, 216, 0.12);
  color: #b6f6f0;
}

.insight-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.insight-card {
  padding: 18px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.insight-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: rgba(129, 226, 216, 0.14);
  color: #b6f6f0;
  font-size: 0.88rem;
  font-weight: 700;
}

.insight-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1rem;
}

.explorer-panel {
  margin-top: 20px;
  padding: 28px;
  color: var(--light-ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(26, 168, 157, 0.16), transparent 30%),
    radial-gradient(circle at 100% 0%, rgba(107, 142, 198, 0.18), transparent 28%),
    radial-gradient(circle at 80% 100%, rgba(239, 140, 89, 0.1), transparent 24%),
    linear-gradient(180deg, rgba(12, 24, 40, 0.98), rgba(14, 30, 48, 0.98));
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 38px 90px rgba(12, 23, 40, 0.34);
}

.explorer-panel .eyebrow {
  color: #81e2d8;
}

.explorer-panel .explorer-lead,
.explorer-panel .field span,
.explorer-panel .detail-card p,
.explorer-panel .path-card p,
.explorer-panel .bridge-item p,
.explorer-panel .candidate-row p,
.explorer-panel .filter-copy p {
  color: var(--light-muted);
}

.explorer-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 520px;
  gap: 18px;
  align-items: end;
}

.explorer-copy {
  min-width: 0;
}

.explorer-lead {
  margin: 12px 0 0;
  max-width: 760px;
  font-size: 1rem;
}

.stage-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.stage-stat,
.control-card,
.context-card,
.graph-side-block,
.explorer-list-block,
.story-card,
.bridge-item,
.candidate-row,
.detail-card,
.path-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.05));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.control-card,
.context-card,
.graph-side-block,
.explorer-list-block {
  padding: 20px;
  border-radius: 26px;
}

.stage-stat,
.story-card,
.bridge-item,
.candidate-row,
.detail-card,
.path-card,
.quality-stat {
  padding: 16px;
  border-radius: 22px;
}

.stage-stat strong,
.story-title,
.quality-stat strong,
.ego-card-block strong,
.bridge-item strong,
.candidate-row strong,
.detail-card strong,
.path-card strong {
  display: block;
}

.stage-stat strong {
  font-size: 1.9rem;
  line-height: 1;
}

.stage-stat span {
  display: block;
  margin-top: 6px;
  color: var(--light-muted);
  font-size: 0.88rem;
}

.control-deck {
  display: grid;
  grid-template-columns: minmax(320px, 1.05fr) minmax(240px, 0.7fr) minmax(300px, 1fr);
  gap: 16px;
  margin-top: 18px;
  align-items: start;
}

.field {
  display: block;
  margin-bottom: 16px;
}

.field span {
  display: block;
  margin-bottom: 8px;
  font-size: 0.92rem;
}

select,
input,
button {
  font: inherit;
}

select {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.08);
  color: var(--light-ink);
}

select option {
  color: var(--ink);
}

.mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.mode-toggle label {
  display: block;
  padding: 13px 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  cursor: pointer;
  transition: transform 150ms ease, border-color 150ms ease, background 150ms ease;
}

.mode-toggle label:hover,
.candidate-row:hover,
.bridge-item:hover {
  transform: translateY(-2px);
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
.mode-toggle label:has(input:focus-visible) {
  outline: 2px solid rgba(129, 226, 216, 0.72);
  outline-offset: 3px;
}

.mode-toggle input {
  display: none;
}

.mode-toggle label.active {
  background: rgba(129, 226, 216, 0.12);
  border-color: rgba(129, 226, 216, 0.28);
  color: #aaf0e9;
}

.filter-list {
  display: grid;
  gap: 10px;
}

.filter-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.filter-item input[type="checkbox"] {
  accent-color: var(--teal);
  margin-top: 4px;
}

.filter-item.disabled {
  opacity: 0.54;
}

.filter-copy strong {
  display: block;
  font-size: 1rem;
}

.range-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--teal);
}

.ego-card,
.bridge-list,
.candidate-list,
.stage-detail-column,
.storyline {
  display: grid;
  gap: 12px;
}

.ego-card-block {
  padding: 16px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.05));
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.graph-stage-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) 360px;
  gap: 18px;
  margin-top: 18px;
  align-items: start;
}

.graph-wrap {
  padding: 18px;
  border-radius: 30px;
  background:
    radial-gradient(circle at center, rgba(122, 112, 216, 0.08), transparent 44%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.12);
  position: sticky;
  top: 16px;
}

.graph {
  min-height: 780px;
  padding: 18px;
  border-radius: 28px;
  background:
    radial-gradient(circle at center, rgba(107, 142, 198, 0.08), transparent 36%),
    linear-gradient(180deg, #11243a, #0f1f34);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.graph-hint {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--light-muted);
  font-size: 0.92rem;
}

.graph svg,
.chart svg,
.hero-visual svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.graph-side {
  display: grid;
  gap: 14px;
}

.story-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 10px;
  border-radius: 50%;
  background: rgba(129, 226, 216, 0.14);
  color: #b4f7f0;
  font-size: 0.82rem;
  font-weight: 700;
}

.story-title {
  margin-bottom: 6px;
  font-size: 1rem;
}

.story-card p {
  margin: 0;
  color: var(--light-muted);
  font-size: 0.92rem;
}

.bridge-list,
.candidate-list {
  max-height: 420px;
  overflow: auto;
  padding-right: 4px;
}

.candidate-row,
.bridge-item {
  transition: transform 150ms ease, border-color 150ms ease, box-shadow 150ms ease;
}

.candidate-row.active,
.bridge-item.active,
.candidate-row.preview,
.bridge-item.preview,
.candidate-row:hover,
.bridge-item:hover {
  border-color: rgba(129, 226, 216, 0.28);
  box-shadow: 0 16px 30px rgba(0, 0, 0, 0.16);
}

.candidate-row.preview,
.bridge-item.preview {
  background: linear-gradient(180deg, rgba(129, 226, 216, 0.14), rgba(255, 255, 255, 0.05));
}

.candidate-row button {
  all: unset;
  appearance: none;
  -webkit-appearance: none;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.bridge-item button {
  all: unset;
  appearance: none;
  -webkit-appearance: none;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.score-rail {
  width: 100%;
  height: 8px;
  margin-top: 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.score-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--coral), var(--amber));
}

.explorer-panel .chip {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
  color: var(--light-ink);
}

.explorer-panel .chip.alt {
  background: rgba(217, 166, 79, 0.16);
  color: #ffd48a;
}

.explorer-panel .chip.blue {
  background: rgba(107, 142, 198, 0.18);
  color: #c7dcff;
}

.explorer-lower {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.atlas-header {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 18px;
  align-items: start;
  margin-top: 20px;
  padding: 24px;
  color: var(--light-ink);
  background:
    radial-gradient(circle at 100% 0%, rgba(107, 142, 198, 0.14), transparent 24%),
    radial-gradient(circle at 0% 100%, rgba(26, 168, 157, 0.1), transparent 22%),
    linear-gradient(180deg, rgba(15, 30, 48, 0.96), rgba(11, 24, 40, 0.96));
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 28px 70px rgba(12, 23, 40, 0.22);
}

.atlas-side {
  display: grid;
  gap: 12px;
}

.atlas-focus {
  min-height: 0;
}

.atlas-focus-card {
  padding: 16px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.05));
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.atlas-focus-card strong {
  display: block;
  font-size: 1.1rem;
  color: var(--light-ink);
}

.atlas-focus-card .eyebrow {
  color: #81e2d8;
}

.atlas-focus-card p {
  margin: 0;
  color: var(--light-muted);
}

.atlas-header .eyebrow,
.chart-panel .eyebrow {
  color: #81e2d8;
}

.quality-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.quality-stat strong {
  font-size: 1.45rem;
  line-height: 1;
  margin-bottom: 6px;
  color: var(--light-ink);
}

.quality-stat p {
  margin: 0;
  font-size: 0.9rem;
}

.atlas-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.chart-panel {
  padding: 24px;
  color: var(--light-ink);
  background:
    radial-gradient(circle at 100% 0%, rgba(122, 112, 216, 0.1), transparent 20%),
    radial-gradient(circle at 0% 100%, rgba(26, 168, 157, 0.08), transparent 22%),
    linear-gradient(180deg, rgba(15, 30, 48, 0.94), rgba(11, 24, 40, 0.94));
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 24px 60px rgba(12, 23, 40, 0.2);
}

.chart-panel.wide {
  grid-column: span 2;
}

.chart {
  min-height: 320px;
}

.axis-label,
.value-label,
.annotation,
.ring-label,
.node-label {
  font-family: "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
}

.axis-label,
.value-label,
.annotation {
  fill: var(--muted);
  font-size: 12px;
}

.ring-label,
.node-label {
  fill: rgba(244, 247, 255, 0.84);
  font-size: 12px;
}

.ring-label {
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.explorer-panel .axis-label,
.explorer-panel .value-label,
.explorer-panel .annotation,
.chart-panel .axis-label,
.chart-panel .value-label,
.chart-panel .annotation {
  fill: rgba(244, 247, 255, 0.76);
}

.hero-visual .node-label,
.hero-visual .annotation,
.hero-visual .ring-label {
  fill: rgba(244, 247, 255, 0.86);
}

@media (max-width: 1320px) {
  .hero,
  .atlas-header,
  .graph-stage-grid,
  .control-deck {
    grid-template-columns: 1fr;
  }

  .explorer-head {
    grid-template-columns: 1fr;
  }

  .stage-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .graph-wrap {
    position: static;
  }
}

@media (max-width: 1080px) {
  .insight-list,
  .explorer-lower,
  .quality-grid,
  .atlas-grid,
  .stage-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chart-panel.wide {
    grid-column: span 2;
  }

  .graph {
    min-height: 620px;
  }
}

@media (max-width: 780px) {
  .shell {
    width: min(100vw - 14px, 1500px);
    margin: 8px auto 28px;
  }

  .hero,
  .narrative-band,
  .explorer-panel,
  .atlas-header,
  .chart-panel {
    padding: 18px;
  }

  .overview-strip,
  .insight-list,
  .stage-metrics,
  .explorer-lower,
  .quality-grid,
  .atlas-grid {
    grid-template-columns: 1fr;
  }

  .chart-panel.wide {
    grid-column: span 1;
  }

  .graph {
    min-height: 420px;
    padding: 8px;
  }

  .bridge-list,
  .candidate-list {
    max-height: none;
    overflow: visible;
  }

  .mode-toggle label:has(input:focus-visible) {
    outline-offset: 2px;
  }
}

/* D3 node tooltip */
.node-tooltip {
  position: fixed;
  z-index: 9999;
  pointer-events: none;
  padding: 10px 14px;
  border-radius: 14px;
  background: rgba(14, 28, 46, 0.96);
  border: 1px solid rgba(129, 226, 216, 0.22);
  color: var(--ink);
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 0.86rem;
  line-height: 1.5;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  max-width: 220px;
  transition: opacity 120ms ease;
}

.node-tooltip strong {
  display: block;
  font-size: 0.96rem;
  color: var(--teal);
  margin-bottom: 4px;
}

/* D3 graph animation helpers */
.g-nodes circle,
.g-links line {
  transition: stroke 120ms ease, stroke-width 120ms ease;
}