:root {
  color-scheme: light;
  --bg: #fbfaf7;
  --paper: #ffffff;
  --ink: #1e2428;
  --muted: #65717a;
  --line: #dfe4e6;
  --soft: #eef4f2;
  --soft-2: #f6efe6;
  --accent: #0f766e;
  --accent-2: #c2410c;
  --accent-3: #2563eb;
  --green: #12805c;
  --shadow: 0 22px 60px rgba(29, 38, 45, 0.1);
  --radius: 8px;
  --article: 1040px;
  --wide: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(15, 118, 110, 0.06), transparent 420px),
    var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

img {
  max-width: 100%;
  display: block;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 64px;
  padding: 0 32px;
  border-bottom: 1px solid rgba(223, 228, 230, 0.9);
  background: rgba(251, 250, 247, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0;
  text-decoration: none;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  font-weight: 650;
}

.site-header nav a {
  color: #3b474f;
  text-decoration: none;
}

.site-header nav a:hover {
  color: var(--accent);
}

.hero {
  width: min(var(--wide), calc(100vw - 40px));
  margin: 0 auto;
  padding: 92px 0 58px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 54px;
  align-items: end;
}

.kicker {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 920px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(42px, 6vw, 78px);
  font-weight: 650;
}

.dek {
  max-width: 760px;
  margin: 28px 0 0;
  color: #3c4850;
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.45;
}

.byline {
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.hero-panel {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.hero-panel div {
  padding: 22px 24px;
  background: var(--paper);
}

.metric-value {
  display: block;
  color: var(--ink);
  font-size: 30px;
  font-weight: 850;
  line-height: 1.1;
}

.metric-label {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
  text-transform: uppercase;
}

.article {
  width: min(var(--article), calc(100vw - 40px));
  margin: 0 auto 80px;
  font-size: 18px;
}

.lead {
  max-width: 900px;
  margin: 0 0 58px;
  color: #2f3a41;
  font-size: 22px;
  line-height: 1.55;
}

.section {
  margin-top: 72px;
}

.section h2 {
  margin-bottom: 20px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 650;
}

.section h3 {
  margin-bottom: 10px;
  font-size: 19px;
  font-weight: 780;
}

.section p {
  max-width: 900px;
  margin: 0 0 18px;
}

.info-card p,
.result-card p,
.behavior-grid p,
.current-card p,
.table-wrap + p,
.placeholder,
.data-note,
figcaption {
  max-width: none;
}

.three-up,
.result-grid,
.behavior-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.result-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.result-subsection {
  margin-top: 34px;
}

.result-subsection > h3 {
  margin-bottom: 12px;
  padding-top: 4px;
  font-size: 24px;
}

.info-card,
.result-card,
.behavior-grid > div,
.current-card,
.chart-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.info-card,
.result-card,
.behavior-grid > div {
  padding: 20px;
}

.info-card p,
.result-card p,
.behavior-grid p {
  margin-bottom: 0;
  color: #4b5861;
  font-size: 15.5px;
  line-height: 1.55;
}

.data-note {
  margin-top: 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.math {
  font-family: Georgia, "Times New Roman", serif;
  white-space: nowrap;
}

.wide-figure {
  width: min(var(--wide), calc(100vw - 40px));
  margin: 32px calc((var(--article) - min(var(--wide), calc(100vw - 40px))) / 2) 0;
}

.architecture-figure {
  width: 100%;
  margin: 30px 0 0;
}

.wide-figure img {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.architecture-figure img {
  width: 100%;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.context-figure {
  margin: 30px 0 0;
  padding: 18px;
  border: 1px solid rgba(202, 213, 216, 0.75);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.32);
  box-sizing: border-box;
}

.context-phases,
.context-snapshots {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  min-width: 0;
}

.context-phases {
  margin-bottom: 14px;
}

.phase-card,
.snapshot {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.68);
  box-sizing: border-box;
  min-width: 0;
}

.phase-card {
  position: relative;
  min-height: 112px;
  padding: 18px;
}

.phase-card:not(:last-child)::after {
  content: ">";
  position: absolute;
  top: 50%;
  right: -14px;
  transform: translate(50%, -50%);
  color: var(--accent);
  font-weight: 850;
  z-index: 2;
}

.phase-card span {
  display: block;
  color: var(--accent);
  font-size: 13px;
  font-weight: 850;
  text-transform: uppercase;
}

.phase-card p {
  margin: 8px 0 0;
  color: #4b5861;
  font-size: 15px;
  line-height: 1.45;
}

.snapshot {
  position: relative;
  min-height: 360px;
  padding: 12px;
  display: grid;
  align-content: start;
  gap: 10px;
  background: rgba(255, 255, 255, 0.46);
}

.snapshot:not(:last-child)::after {
  content: ">";
  position: absolute;
  top: 50%;
  right: -14px;
  transform: translate(50%, -50%);
  color: var(--accent);
  font-size: 18px;
  font-weight: 850;
}

.cell {
  min-height: 52px;
  padding: 9px 11px;
  border: 1px solid #cad5d8;
  border-left-width: 5px;
  border-radius: 7px;
  background: #ffffff;
  color: #26333a;
  font-size: 13px;
  line-height: 1.35;
  box-sizing: border-box;
  min-width: 0;
  width: 100%;
  overflow: hidden;
}

.cell b {
  display: inline-block;
  margin-right: 7px;
  font-size: 12px;
}

.cell code {
  display: block;
  margin-top: 6px;
  color: #24343b;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  max-width: 100%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cell small {
  display: block;
  margin-top: 6px;
  color: #5e6c74;
  font-size: 12px;
  overflow-wrap: anywhere;
}

.md-cell {
  border-left-color: #8b5cf6;
  background: #fbf8ff;
}

.code-cell {
  border-left-color: var(--accent);
  background: #f8fffd;
}

.folded-cell {
  border-left-color: #2563eb;
  background: #f6f9ff;
}

.deleted-cell {
  border-left-color: #b45309;
  background: #fff7ed;
  color: #8a4b10;
  opacity: 0.82;
}

.status {
  float: right;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 850;
  text-transform: uppercase;
}

.status.unfolded {
  background: #dff7ef;
  color: #0f766e;
}

.status.folded {
  background: #e7efff;
  color: #2563eb;
}

.status.deleted {
  background: #ffedd5;
  color: #b45309;
}

figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.table-wrap {
  overflow-x: auto;
  margin: 26px 0 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.compact-table {
  margin-top: 18px;
}

table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 15px;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

th {
  background: #f4f7f6;
  color: #34414a;
  font-size: 13px;
  text-transform: uppercase;
}

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

.best {
  color: var(--green);
  font-weight: 850;
}

.fail {
  color: var(--accent-2);
  font-weight: 700;
}

.placeholder {
  margin: 18px 0 0;
  padding: 16px 18px;
  border: 1px dashed #a8b5b8;
  border-radius: var(--radius);
  background: #f7faf9;
  color: #56646c;
  font-size: 14px;
  line-height: 1.55;
}

.full-placeholder {
  min-height: 180px;
  display: flex;
  align-items: center;
}

.kernelbench-figure {
  margin: 28px 0 0;
}

.kernelbench-figure-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 16px;
}

.kernelbench-figure-header .kicker {
  margin-bottom: 5px;
}

.kernelbench-figure h4 {
  margin: 0;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.2;
}

.kernelbench-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 14px;
  color: #40505a;
  font-size: 13px;
  font-weight: 750;
  line-height: 1.3;
}

.kernelbench-legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
}

.legend-notebook {
  background: var(--accent);
}

.legend-cheetah {
  background: var(--accent-2);
}

.kernelbench-panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.kernelbench-panel {
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.kernelbench-panel-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.kernelbench-panel-title h4 {
  font-size: 17px;
}

.kernelbench-panel-title span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.kernelbench-radar {
  width: 100%;
  aspect-ratio: 16 / 15;
  display: block;
}

.kernelbench-grid {
  fill: none;
  stroke: #d9e1e3;
  stroke-width: 1;
}

.kernelbench-axis {
  stroke: #b8c4c7;
  stroke-width: 1.1;
}

.kernelbench-axis-label {
  fill: #3b474f;
  font-size: 12px;
  font-weight: 760;
}

.kernelbench-shape {
  stroke-width: 2.8;
  stroke-linejoin: round;
}

.kernelbench-shape-notebook {
  fill: rgba(15, 118, 110, 0.2);
  stroke: var(--accent);
}

.kernelbench-shape-cheetah {
  fill: rgba(194, 65, 12, 0.16);
  stroke: var(--accent-2);
}

.kernelbench-dot-notebook {
  fill: var(--accent);
}

.kernelbench-dot-cheetah {
  fill: var(--accent-2);
}

.kernelbench-panel-meta {
  margin: 4px 0 0;
  color: #52606a;
  font-size: 13px;
  line-height: 1.45;
}

.kernelbench-metric-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.kernelbench-metric-pills span {
  padding: 7px 10px;
  border: 1px solid #cfdadc;
  border-radius: 999px;
  background: #f4f7f6;
  color: #34414a;
  font-size: 13px;
  font-weight: 820;
  line-height: 1.2;
}

.interactive {
  width: 100%;
  margin: 30px 0 0;
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(360px, 1.1fr);
  gap: 22px;
  align-items: stretch;
}

.packing-stage {
  position: relative;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

#packingCanvas {
  width: 100%;
  aspect-ratio: 1;
  height: auto;
  border-radius: 6px;
  background: #f8faf8;
}

.stage-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.stage-caption strong {
  color: var(--green);
  font-size: 20px;
}

.packing-controls {
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  gap: 14px;
}

.current-card {
  padding: 20px;
  min-height: 142px;
}

.current-card p:last-child {
  margin-bottom: 0;
}

.chart-card {
  padding: 14px;
  min-height: 260px;
}

#scoreChart {
  width: 100%;
  height: 100%;
  min-height: 240px;
  display: block;
}

.controls-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

button {
  border: 1px solid #0f766e;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}

#playButton {
  height: 42px;
}

button:hover {
  background: #0b615b;
}

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

.frame-buttons {
  display: flex;
  flex-wrap: nowrap;
  gap: 5px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.frame-buttons button {
  flex: 1 1 0;
  min-width: 0;
  min-height: 34px;
  padding: 0 3px;
  border-color: var(--line);
  background: var(--paper);
  color: #40505a;
  font-size: 10.5px;
  white-space: nowrap;
}

.frame-buttons button.active {
  border-color: var(--accent);
  background: var(--soft);
  color: var(--accent);
}

.site-footer {
  display: flex;
  justify-content: center;
  gap: 18px;
  padding: 34px 20px 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.target-label,
.axis-label,
.point-label {
  fill: #61707a;
  font-size: 12px;
  font-weight: 650;
}

@media (max-width: 920px) {
  .hero,
  .interactive {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 60px;
  }

  .hero-panel {
    max-width: 520px;
  }

  .three-up,
  .result-grid,
  .behavior-grid,
  .kernelbench-panels,
  .context-phases,
  .context-snapshots {
    grid-template-columns: 1fr;
  }

  .phase-card:not(:last-child)::after,
  .snapshot:not(:last-child)::after {
    display: none;
  }

  .wide-figure,
  .interactive {
    margin-left: 0;
    margin-right: 0;
    width: 100%;
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 20px;
    gap: 8px;
  }

  .site-header nav {
    flex-wrap: wrap;
    gap: 12px;
  }

  .hero,
  .article {
    width: min(100vw - 28px, var(--article));
  }

  .lead {
    font-size: 19px;
  }

  .controls-row {
    grid-template-columns: 1fr;
  }

  .kernelbench-figure-header,
  .kernelbench-panel-title {
    align-items: flex-start;
    flex-direction: column;
  }

  .kernelbench-legend {
    justify-content: flex-start;
  }

  .kernelbench-panel {
    padding: 14px;
  }

  .site-footer {
    flex-direction: column;
    align-items: center;
  }
}