:root {
  color-scheme: light;
  --ink: #171412;
  --muted: #69645f;
  --line: #e6e6e6;
  --paper: #ffffff;
  --soft: #ffffff;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --rust: #b45309;
  --blue: #2563eb;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.08);
  --sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "Source Serif 4", Georgia, serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--accent-dark);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 16px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 32px);
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(380px, 1.1fr);
  align-items: center;
  gap: clamp(32px, 6vw, 84px);
  min-height: calc(100vh - 72px);
  padding: clamp(42px, 7vw, 96px) clamp(20px, 5vw, 72px) 44px;
}

.hero-copy {
  max-width: 650px;
}

.home-page {
  background: #fff;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  align-items: start;
  gap: clamp(34px, 7vw, 96px);
  max-width: 1040px;
  min-height: auto;
  margin: 0 auto;
  padding: clamp(58px, 9vw, 120px) 24px clamp(72px, 10vw, 130px);
}

.home-intro {
  max-width: 690px;
}

.home-about {
  margin-top: 24px;
  color: #242424;
  font-family: var(--serif);
  font-size: clamp(20px, 2.1vw, 25px);
  line-height: 1.42;
  text-align: justify;
  text-justify: inter-word;
}

.home-about p {
  margin-bottom: 20px;
  hyphens: auto;
}

.profile-photo {
  width: 100%;
  max-width: 320px;
  margin: 10px 0 0;
  justify-self: end;
}

.profile-photo img {
  display: block;
  width: 100%;
  max-width: 320px;
  max-height: 400px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center;
  border: 1px solid var(--line);
}

.eyebrow,
.feature-meta,
.card-kicker,
.crumb {
  margin: 0 0 14px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.hero h1 {
  margin-bottom: 18px;
  font-family: var(--serif);
  font-size: clamp(68px, 11vw, 154px);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 560px;
  color: #3e3935;
  font-family: var(--serif);
  font-size: clamp(25px, 4vw, 39px);
  line-height: 1.08;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  font-size: 14px;
  font-weight: 800;
}

.button.primary {
  background: var(--ink);
  color: var(--paper);
}

.button.secondary {
  background: transparent;
}

.simulation-panel {
  position: relative;
  overflow: hidden;
  min-height: 440px;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.06), rgba(180, 83, 9, 0.06)),
    #ffffff;
  box-shadow: var(--shadow);
}

.simulation-panel canvas,
.article-figure canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.panel-caption {
  position: absolute;
  right: 18px;
  bottom: 18px;
  left: 18px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(23, 20, 18, 0.12);
  color: var(--muted);
  font-size: 13px;
  backdrop-filter: blur(14px);
}

.panel-caption strong {
  color: var(--ink);
}

.section-band {
  padding: clamp(56px, 8vw, 104px) clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--soft);
}

.about-band {
  background: #fff;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 5vw, 84px);
  max-width: 1160px;
  margin: 0 auto;
}

.section-grid h2,
.section-heading h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(36px, 5vw, 62px);
  line-height: 1;
  letter-spacing: 0;
}

.rich-copy {
  color: #3f3a35;
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1.35;
}

.content-wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: clamp(56px, 8vw, 104px) clamp(20px, 5vw, 28px);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 32px;
}

.section-heading.wide {
  max-width: 1060px;
  margin: 0 auto 36px;
}

.feature-list {
  display: grid;
  border-top: 1px solid var(--line);
}

.feature-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 0.9fr) minmax(240px, 1fr);
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.feature-item h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(25px, 3vw, 34px);
  line-height: 1.05;
}

.feature-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1160px;
  margin: 0 auto;
}

.tutorial-card {
  display: flex;
  min-height: 260px;
  flex-direction: column;
  padding: 24px;
  border: 1px solid #d5cec4;
  background: var(--paper);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.tutorial-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(34, 29, 24, 0.12);
}

.tutorial-card h3 {
  margin-bottom: 14px;
  font-family: var(--serif);
  font-size: 31px;
  line-height: 1.02;
}

.tutorial-card p {
  color: var(--muted);
  line-height: 1.55;
}

.tutorial-card.muted {
  background: #fff;
}

.read-link {
  margin-top: auto;
  color: var(--accent-dark);
  font-weight: 800;
}

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

.paper-row {
  display: grid;
  grid-template-columns: 90px 210px minmax(0, 1fr);
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  color: #3f3a35;
  line-height: 1.5;
}

.paper-head {
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 34px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

.site-footer p {
  margin: 8px 0 0;
  color: var(--muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  color: var(--muted);
  font-weight: 700;
}

.article-body {
  background: var(--paper);
}

.tutorial-index {
  max-width: 1040px;
  margin: 0 auto;
  padding: clamp(52px, 8vw, 96px) 24px clamp(72px, 10vw, 120px);
}

.index-header {
  max-width: 800px;
  margin-bottom: clamp(44px, 7vw, 76px);
}

.index-header h1 {
  margin-bottom: 18px;
  font-family: var(--serif);
  font-size: clamp(48px, 8vw, 82px);
  line-height: 0.98;
  letter-spacing: 0;
}

.index-header p {
  color: #4a4a4a;
  font-family: var(--serif);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.28;
}

.category-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.category-block {
  display: grid;
  grid-template-columns: 310px minmax(0, 1fr);
  gap: clamp(24px, 5vw, 60px);
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.category-heading h2 {
  margin-bottom: 10px;
  font-family: var(--serif);
  font-size: 31px;
  line-height: 1.08;
}

.category-heading p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.category-code {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-links {
  display: grid;
  align-content: start;
  border-top: 1px solid var(--line);
}

.article-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.article-link strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1.16;
}

.article-link small {
  color: var(--muted);
  font-size: 14px;
}

.article-link em {
  flex: 0 0 auto;
  color: var(--accent-dark);
  font-size: 13px;
  font-style: normal;
  font-weight: 800;
}

.article-link.upcoming {
  color: #777;
  cursor: default;
}

.article-shell {
  display: grid;
  grid-template-columns: minmax(180px, 220px) minmax(0, 860px);
  column-gap: clamp(32px, 5vw, 64px);
  max-width: 1192px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.article-shell > :not(.tutorial-toc) {
  grid-column: 2;
  width: 100%;
}

.tutorial-toc {
  position: sticky;
  top: 104px;
  grid-column: 1;
  grid-row: 2 / span 50;
  align-self: start;
  max-height: calc(100vh - 128px);
  overflow-y: auto;
  padding: 2px 0 20px;
  font-family: var(--sans);
}

.tutorial-toc-title {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tutorial-toc-list,
.tutorial-toc-sublist {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tutorial-toc-list {
  padding-left: 1px;
  border-left: 1px solid var(--line);
}

.tutorial-toc-sublist {
  margin: 2px 0 4px 14px;
  padding-left: 1px;
  border-left: 1px solid var(--line);
}

.tutorial-toc a {
  display: grid;
  grid-template-columns: minmax(22px, max-content) minmax(0, 1fr);
  gap: 8px;
  align-items: start;
  margin-left: -1px;
  padding: 6px 0 6px 12px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.35;
}

.tutorial-toc-number {
  color: var(--accent-dark);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.tutorial-toc-text {
  min-width: 0;
}

.tutorial-toc a:hover,
.tutorial-toc a:focus,
.tutorial-toc a.is-active {
  border-left-color: var(--accent);
  color: var(--accent-dark);
}

.tutorial-toc-depth-2 > a {
  font-size: 13px;
}

.tutorial-toc-depth-3 > a {
  font-size: 13px;
  font-weight: 600;
}

.tutorial-toc-depth-3 .tutorial-toc-number {
  color: var(--muted);
}

.tutorial-toc-depth-1 > a {
  color: #3f3a35;
}

.article-shell.has-toc {
  padding-bottom: 80px;
}

.article-header {
  max-width: 860px;
  margin: 0;
  padding: clamp(54px, 8vw, 92px) 0 34px;
}

.article-header h1 {
  margin-bottom: 22px;
  font-family: var(--serif);
  font-size: clamp(42px, 6vw, 68px);
  line-height: 0.98;
  letter-spacing: 0;
  text-align: justify;
}

.dek {
  color: #4a4540;
  font-family: var(--serif);
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.18;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 26px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.article-read-count {
  color: var(--accent-dark);
  font-variant-numeric: tabular-nums;
}

.article-read-count.is-loading {
  color: var(--muted);
}

.article-figure {
  margin: 0 auto 46px;
}

.wide-figure {
  max-width: 1120px;
  padding: 0 20px;
}

.wide-figure canvas {
  min-height: 420px;
  border: 1px solid var(--line);
  background: #fff;
}

figcaption {
  max-width: 760px;
  margin: 12px auto 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
  text-align: center;
}

.article-content {
  max-width: 860px;
  margin: 0;
  padding: 0;
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.62;
}

.article-content h2 {
  margin: 48px 0 14px;
  font-family: var(--sans);
  font-size: 27px;
  line-height: 1.2;
}

.article-content h3 {
  margin: 36px 0 12px;
  font-family: var(--sans);
  font-size: 21px;
  line-height: 1.25;
}

.article-content p {
  margin-bottom: 24px;
  text-align: justify;
  text-justify: inter-word;
}

.article-content a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-content mjx-container[jax="SVG"][display="true"] {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 2px;
}

.article-content ul {
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 12px;
}

.inline-figure {
  margin: 34px auto;
}

.inline-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
}

.wasm-preview {
  max-width: 1120px;
  margin: 34px auto 64px;
  padding: 20px;
  border: 1px solid var(--line);
  background: #fff;
}

.wasm-toolbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: 18px;
  margin-bottom: 14px;
}

.wasm-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.wasm-preview button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.wasm-parameter-table {
  width: 100%;
  max-width: 100%;
  margin: 0;
  table-layout: fixed;
  font-family: var(--sans);
  font-size: 14px;
}

.wasm-parameter-table th,
.wasm-parameter-table td {
  padding: 6px 8px;
}

.wasm-parameter-table th {
  color: #555;
  font-size: 12px;
}

.wasm-parameter-table input {
  width: 100%;
  height: 36px;
  padding: 5px 8px;
  border: 1px solid #cfcfcf;
  font: inherit;
}

.wasm-progress-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.wasm-progress-row input {
  width: 100%;
}

.wasm-progress-label {
  min-width: 104px;
  color: #555;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  text-align: right;
}

.wasm-canvas {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
  border: 1px solid var(--line);
  background: #fff;
}

pre {
  overflow-x: auto;
  margin: 30px 0;
  padding: 20px;
  background: #171717;
  color: #f7f7f7;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  line-height: 1.55;
}

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

.callout {
  margin: 30px 0;
  padding: 20px 22px;
  border-left: 4px solid var(--accent);
  background: #f7fbfa;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
}

table {
  width: 100%;
  margin: 34px 0;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.45;
}

th,
td {
  padding: 13px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 900px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .top-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero,
  .home-hero,
  .section-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .simulation-panel {
    min-height: 360px;
  }

  .feature-item,
  .category-block,
  .paper-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .tutorial-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
  }

  .wasm-toolbar {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

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

  .wasm-progress-label {
    text-align: left;
  }
}

@media (max-width: 1180px) {
  .article-shell {
    display: block;
    max-width: none;
    padding: 0 0 80px;
  }

  .article-shell > :not(.tutorial-toc) {
    width: auto;
  }

  .article-header {
    max-width: 900px;
    margin: 0 auto;
    padding: clamp(54px, 8vw, 92px) 24px 34px;
  }

  .tutorial-toc {
    position: static;
    max-width: 860px;
    max-height: none;
    margin: -8px auto 34px;
    padding: 0 24px 22px;
    border-bottom: 1px solid var(--line);
  }

  .tutorial-toc-list {
    gap: 2px;
    padding-left: 1px;
    border-left: 1px solid var(--line);
  }

  .tutorial-toc a {
    margin-left: -1px;
    padding: 5px 0 5px 12px;
  }

  .tutorial-toc a:hover,
  .tutorial-toc a:focus,
  .tutorial-toc a.is-active {
    border-left-color: var(--accent);
    color: var(--accent-dark);
  }

  .article-content {
    margin: 0 auto;
    padding: 0 24px;
  }
}

@media (max-width: 560px) {
  .hero h1 {
    font-size: clamp(54px, 18vw, 74px);
  }

  .panel-caption {
    align-items: flex-start;
    flex-direction: column;
  }

  .article-content {
    font-size: 20px;
  }

  .wide-figure canvas {
    min-height: 300px;
  }
}