:root {
  color-scheme: light;
  --ink: #14202b;
  --muted: #566677;
  --line: #d9e1e8;
  --soft-line: #e8edf2;
  --paper: #ffffff;
  --wash: #f6f8fb;
  --blue: #1975ba;
  --navy: #0d3b66;
  --green: #2f6f5e;
  --green-soft: #dff1e2;
  --pink: #fd9eb2;
  --rose-soft: #fff0f3;
  --orange: #f0a780;
  --max: 1120px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--soft-line);
  backdrop-filter: blur(12px);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 1px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0;
}

.brand span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
  font-weight: 700;
}

.nav-links a {
  color: #263645;
}

.nav-links a[aria-current="page"] {
  color: var(--blue);
}

.hero {
  min-height: 560px;
  display: grid;
  align-items: end;
  background:
    linear-gradient(90deg, rgba(13, 28, 42, 0.93), rgba(13, 28, 42, 0.78), rgba(13, 28, 42, 0.35)),
    url("toy-example/depth-hric-clr-pca.png") center right / cover no-repeat;
  color: #fff;
}

.hero-inner {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
  padding: 96px 0 74px;
}

.eyebrow {
  margin: 0 0 12px;
  color: #c8e0f2;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.12;
  letter-spacing: 0;
}

h1 {
  max-width: 780px;
  font-size: clamp(42px, 6vw, 76px);
}

h2 {
  font-size: clamp(28px, 3.5vw, 44px);
}

h3 {
  font-size: 21px;
}

p {
  margin: 0;
}

.lead {
  max-width: 760px;
  margin-top: 22px;
  font-size: clamp(18px, 2.2vw, 23px);
  color: rgba(255, 255, 255, 0.88);
}

.hero-actions,
.button-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.mt-16 {
  margin-top: 16px;
}

.mt-22 {
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: var(--blue);
  color: #fff;
  font-weight: 800;
}

.button:hover {
  text-decoration: none;
  background: #115f98;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.38);
}

.button.secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}

.band .button.secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--blue);
}

.band .button.secondary:hover {
  background: #f1f5f9;
}

.band {
  border-top: 1px solid var(--soft-line);
  background: var(--paper);
}

.band.alt {
  background: var(--wash);
}

.wrap {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
  padding: 72px 0;
}

.section-kicker {
  margin-bottom: 9px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(260px, 0.7fr);
  gap: 38px;
  align-items: end;
  margin-bottom: 34px;
}

.section-head > *,
.grid-2 > *,
.grid-3 > *,
.diagnostic-panel > *,
.plots-grid > * {
  min-width: 0;
}

.section-head p {
  color: var(--muted);
  font-size: 17px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.feature-card,
.note-card,
.reference-list,
.code-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.feature-card {
  min-height: 250px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 22px;
}

.feature-card p,
.note-card p {
  color: var(--muted);
}

.feature-card .number {
  color: var(--green);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.feature-card a {
  font-weight: 850;
}

.note-card {
  padding: 22px;
}

.note-card.accent-blue {
  border-top: 4px solid var(--blue);
}

.note-card.accent-green {
  border-top: 4px solid var(--green);
}

.note-card.accent-pink {
  border-top: 4px solid var(--pink);
}

.masthead {
  background:
    linear-gradient(90deg, rgba(13, 59, 102, 0.94), rgba(25, 117, 186, 0.72)),
    linear-gradient(180deg, #163e63, #0d3b66);
  color: #fff;
}

.masthead .wrap {
  padding: 72px 0 62px;
}

.masthead h1 {
  font-size: clamp(38px, 5vw, 64px);
}

.masthead .lead {
  color: rgba(255, 255, 255, 0.9);
  max-width: 840px;
}

.breadcrumbs {
  margin-bottom: 18px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  font-weight: 750;
}

.breadcrumbs a {
  color: #fff;
}

.figure-shell {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.figure-shell img {
  display: block;
  width: 100%;
  height: auto;
}

.caption {
  padding: 12px 16px 15px;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--soft-line);
}

.formula {
  overflow-x: auto;
  margin: 18px 0 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
  color: #1d2c3a;
  font-size: 17px;
}

.definition-list {
  display: grid;
  gap: 14px;
}

.definition-list div {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--soft-line);
}

.definition-list dt {
  font-weight: 850;
}

.definition-list dd {
  margin: 4px 0 0;
  color: var(--muted);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.comparison-table th,
.comparison-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--soft-line);
  text-align: left;
  vertical-align: top;
}

.comparison-table th {
  background: #f1f5f9;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.comparison-table tr:last-child td {
  border-bottom: 0;
}

.table-wrap {
  overflow-x: auto;
}

.point-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  font-weight: 850;
}

.point-dot {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  flex: 0 0 auto;
  border: 1px solid rgba(20, 32, 43, 0.25);
}

.point-dot.p1 {
  background: #1975ba;
}

.point-dot.p2 {
  background: #2f6f5e;
}

.point-dot.p3 {
  background: #fd9eb2;
}

.point-dot.p4 {
  background: #f0a780;
}

.point-dot.p5 {
  background: #8b6fcb;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #f8fafc;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.status-pill.boundary {
  border-color: #f4c59b;
  background: #fff6ef;
  color: #a85327;
}

.marker-row {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 18px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  font-size: 14px;
}

.marker-row strong {
  color: var(--ink);
}

.marker-key-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
}

.marker-symbol {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--blue);
  border: 1px solid #fff;
  box-shadow: 0 0 0 1px rgba(20, 32, 43, 0.22);
  flex: 0 0 auto;
}

.marker-symbol.thin {
  border-color: #334155;
}

.marker-symbol.hollow {
  background: transparent;
  border: 2px solid #14202b;
  box-shadow: none;
}

.transform-path {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.path-token {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
  color: var(--ink);
  font-weight: 850;
}

.path-arrow {
  color: var(--muted);
  font-weight: 850;
}

.numeric-note {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
}

.subsection-title {
  margin: 28px 0 12px;
}

.subsection-title.first {
  margin-top: 0;
}

.diagnostic-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 340px);
  gap: 22px;
  align-items: start;
}

.points-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.points-table th,
.points-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--soft-line);
  text-align: left;
  vertical-align: middle;
}

.points-table th {
  background: #f1f5f9;
  color: #314253;
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.points-table tr:last-child td {
  border-bottom: 0;
}

.count-input {
  width: 66px;
  min-height: 34px;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-variant-numeric: tabular-nums;
}

.count-triplet {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.count-field {
  display: grid;
  gap: 3px;
}

.count-field span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.point-total {
  margin-top: 7px;
  color: var(--muted);
  font-size: 12px;
}

.count-input:focus {
  outline: 2px solid rgba(25, 117, 186, 0.18);
  border-color: var(--blue);
}

.normalized-cell,
.numeric-cell {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  white-space: nowrap;
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.preset-btn {
  min-height: 34px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--blue);
  font-weight: 850;
  cursor: pointer;
}

.preset-btn:hover {
  background: #eef6fc;
}

.eps-section {
  border: 1px solid var(--line);
  border-top: 4px solid var(--pink);
  border-radius: 8px;
  background: #fff;
  padding: 18px;
}

.eps-section h3 {
  font-size: 18px;
}

.eps-section p {
  margin-top: 9px;
  color: var(--muted);
  font-size: 14px;
}

.eps-input-row {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 16px;
  font-weight: 850;
}

.eps-number-input {
  width: 112px;
  min-height: 34px;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font: inherit;
}

.eps-slider {
  width: 100%;
  margin-top: 14px;
  accent-color: var(--pink);
}

.eps-range-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
}

.check-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
}

.plots-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.plot-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.plot-card-header {
  padding: 15px 18px 12px;
  border-bottom: 1px solid var(--soft-line);
}

.plot-card-header h3 {
  font-size: 19px;
}

.plot-card-header p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.plot-card .transform-path {
  margin: 12px 16px;
}

.plot-legend {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 10px 16px;
  border-top: 1px solid var(--soft-line);
  border-bottom: 1px solid var(--soft-line);
  background: #f8fafc;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

.legend-shape {
  width: 12px;
  height: 12px;
  border: 2px solid #475569;
  display: inline-block;
  flex: 0 0 auto;
}

.legend-shape.circle {
  border-radius: 50%;
}

.legend-shape.diamond {
  transform: rotate(45deg);
}

.legend-shape.square {
  border-radius: 2px;
}

.plot-div {
  width: 100%;
  min-height: 560px;
}

.plot-fallback {
  padding: 20px;
  color: var(--muted);
  font-size: 14px;
}

.readout-table {
  min-width: 760px;
}

.status-pill.invalid {
  border-color: #fecaca;
  background: #fef2f2;
  color: #991b1b;
}

.status-pill.near {
  border-color: #cbd5e1;
  background: #f8fafc;
  color: #475569;
}

.code-card {
  overflow: hidden;
}

.code-card pre {
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  background: #111922;
  color: #edf6ff;
  font-size: 14px;
  line-height: 1.55;
}

.code-card code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.note-card code {
  padding: 2px 5px;
  border-radius: 5px;
  background: #eef3f8;
  color: #18344f;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.92em;
}

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

.metric {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.metric strong {
  display: block;
  color: var(--blue);
  font-size: 26px;
  line-height: 1.1;
}

.metric span {
  color: var(--muted);
  font-size: 14px;
}

.reference-list {
  padding: 20px 22px;
}

.reference-list ol {
  margin: 0;
  padding-left: 22px;
}

.reference-list li {
  margin: 0 0 10px;
  color: var(--muted);
}

.reference-list li:last-child {
  margin-bottom: 0;
}

.footer {
  border-top: 1px solid var(--soft-line);
  background: #101923;
  color: rgba(255, 255, 255, 0.72);
}

.footer .wrap {
  padding: 30px 0;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.footer a {
  color: #c9e6ff;
}

@media (max-width: 860px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    min-height: 620px;
    background-position: center;
  }

  .section-head,
  .grid-2,
  .grid-3,
  .diagnostic-panel,
  .plots-grid {
    grid-template-columns: 1fr;
  }

  .inline-metrics {
    grid-template-columns: 1fr;
  }

  .plot-div {
    min-height: 500px;
  }
}

@media (max-width: 560px) {
  .nav,
  .wrap,
  .hero-inner {
    width: min(100% - 30px, var(--max));
  }

  .nav-links {
    gap: 12px;
    font-size: 13px;
  }

  .wrap {
    padding: 54px 0;
  }

  .hero-inner {
    padding: 76px 0 56px;
  }

  h1 {
    font-size: 40px;
  }

  h2 {
    font-size: 30px;
  }

  .plot-div {
    min-height: 430px;
  }

  .formula {
    padding: 14px 15px;
    font-size: 15px;
  }

  .comparison-table {
    display: block;
    overflow-x: auto;
  }

  .marker-key-item {
    white-space: normal;
  }
}