:root {
  color-scheme: light;
  --ink: #17243a;
  --muted: #5d6b7e;
  --paper: #f3f7fd;
  --surface: #ffffff;
  --line: #d8e2ef;
  --brand: #006fe5;
  --brand-strong: #0057b8;
  --brand-soft: #e7f1ff;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; background: var(--paper); }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--brand-strong); }
a:focus-visible { outline: 3px solid var(--brand); outline-offset: 4px; }
.shell { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }

.site-header { border-bottom: 1px solid var(--line); background: var(--paper); }
.nav-shell { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; }
.brand-logo { display: block; width: 160px; height: auto; }
.site-header nav { display: flex; flex-wrap: wrap; align-items: center; gap: clamp(14px, 3vw, 32px); color: var(--muted); font-size: 14px; font-weight: 620; }
.language-link { padding: 8px 11px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink); }

.hero { padding: clamp(72px, 12vw, 144px) 0 92px; border-bottom: 1px solid var(--line); }
.hero-inner { max-width: 940px; }
.eyebrow { margin: 0 0 18px; color: var(--brand-strong); font: 700 11px/1.5 var(--mono); letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
.hero h1 { max-width: 940px; margin-bottom: 24px; font-size: clamp(46px, 8.6vw, 96px); line-height: .99; letter-spacing: -.075em; }
.lede { max-width: 790px; margin-bottom: 0; color: var(--muted); font-size: clamp(17px, 2vw, 21px); line-height: 1.8; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 0 19px; border: 1px solid var(--brand); border-radius: 999px; font-size: 14px; font-weight: 700; transition: background .16s ease, color .16s ease, transform .16s ease; }
.button:hover { transform: translateY(-1px); }
.button.primary { color: white; background: var(--brand); }
.button.primary:hover { color: white; background: var(--brand-strong); }
.button.secondary { color: var(--brand-strong); background: transparent; }
.button.secondary:hover { background: var(--brand-soft); }
.release-note { margin: 25px 0 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.quick-install { max-width: 580px; margin-top: 24px; }
.quick-install p { color: var(--muted); font-size: 13px; line-height: 1.7; }

.showcase { padding: 84px 0 96px; background: var(--surface); }
.section-heading { max-width: 700px; margin-bottom: 30px; }
.section-heading h2 { margin-bottom: 12px; font-size: clamp(30px, 5vw, 48px); line-height: 1.08; letter-spacing: -.055em; }
.section-heading > p:last-child { margin-bottom: 0; color: var(--muted); line-height: 1.75; }
.showcase-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.code-card { min-width: 0; overflow: hidden; border: 1px solid #293e59; border-radius: 12px; color: #eaf2ff; background: #14233a; }
.code-header { min-height: 48px; display: flex; align-items: center; gap: 12px; padding: 0 17px; border-bottom: 1px solid #293e59; color: #91bdff; font: 700 10px var(--mono); letter-spacing: .1em; }
.code-header small { margin-left: auto; color: #9cacc1; font: 11px var(--mono); letter-spacing: 0; }
pre { overflow: auto; margin: 0; padding: 23px; color: #eaf2ff; font: 12px/1.8 var(--mono); white-space: pre; }
code { font-family: var(--mono); }

.playground-panel { margin-top: 34px; padding: clamp(18px, 3vw, 30px); border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.playground-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 12px; }
.playground-heading .eyebrow { margin-bottom: 8px; }
.playground-heading h3 { margin: 0; font-size: clamp(22px, 3vw, 30px); letter-spacing: -.04em; }
.playground-actions { display: flex; flex-wrap: wrap; gap: 9px; }
.playground-actions .button { min-height: 40px; padding-inline: 16px; cursor: pointer; }
.playground-actions .button:disabled { cursor: not-allowed; opacity: .48; transform: none; }
.playground-help { max-width: 780px; margin-bottom: 21px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.playground-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px; }
.playground-editor, .playground-output { min-width: 0; }
.playground-editor label, .playground-output-label { display: block; margin-bottom: 9px; font-size: 12px; font-weight: 700; }
.playground-editor textarea { display: block; width: 100%; min-height: 390px; resize: vertical; padding: 17px; border: 1px solid #293e59; border-radius: 8px; color: #eaf2ff; background: #14233a; font: 12px/1.8 var(--mono); tab-size: 2; }
.playground-editor textarea:focus-visible { outline: 3px solid var(--brand); outline-offset: 3px; }
.playground-output iframe { display: block; width: 100%; min-height: 390px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.playground-status { min-height: 1.7em; margin: 13px 0 0; color: var(--muted); font: 12px/1.7 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere; }
.playground-status[data-state="error"] { color: #9c2e24; }
.playground-status[data-state="success"] { color: var(--brand-strong); }

.demo-section { border-top: 1px solid var(--line); }
.demo-card { min-width: 0; padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.demo-card h3 { font-size: 22px; }
.demo-controls { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.demo-control { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; font-size: 13px; }
.demo-control label { font-weight: 700; }
.demo-control output { font-family: var(--mono); }
.demo-control input { grid-column: 1 / -1; width: 100%; min-height: 40px; accent-color: var(--brand); }
.demo-control input[type="number"] { padding: 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); font: inherit; }
.demo-control input:focus-visible, .demo-source summary:focus-visible { outline: 3px solid var(--brand); outline-offset: 3px; }
.demo-control input[aria-invalid="true"] { border-color: #9c2e24; }
.demo-preview { display: grid; place-items: center; min-height: 320px; margin-top: 20px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); overflow: auto; }
.demo-preview svg { display: block; width: min(100%, 320px); }
.demo-preview math { padding: 18px; font-size: clamp(22px, 4vw, 34px); }
.demo-source { margin-top: 18px; }
.demo-source summary { cursor: pointer; font-size: 13px; font-weight: 700; }
.demo-source pre { max-height: 350px; margin-top: 12px; border-radius: 8px; background: #14233a; }

.features { padding: 88px 0 100px; }
.features .section-heading { margin-bottom: 34px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 15px; }
.feature-card { min-height: 255px; display: flex; flex-direction: column; align-items: flex-start; padding: 25px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.card-index { margin-bottom: 42px; color: var(--brand-strong); font: 12px var(--mono); }
.feature-card h3 { margin-bottom: 11px; font-size: 20px; letter-spacing: -.04em; }
.feature-card > p:not(.card-index) { margin-bottom: 18px; color: var(--muted); font-size: 14px; line-height: 1.75; overflow-wrap: anywhere; }
.text-link { margin-top: auto; color: var(--brand-strong); font-size: 13px; font-weight: 700; }
.text-link + .text-link { margin-top: 10px; }

.spec-document { max-width: 860px; }
.spec-section { padding: 28px 0; border-top: 1px solid var(--line); }
.spec-section .card-index { margin-bottom: 14px; }
.spec-section h3 { margin-bottom: 12px; font-size: 24px; letter-spacing: -.04em; }
.spec-section > p:not(.card-index) { max-width: 780px; margin-bottom: 0; color: var(--muted); line-height: 1.8; overflow-wrap: anywhere; }
.spec-section pre { margin-top: 18px; border-radius: 8px; background: #14233a; }
.spec-legend { display: flex; flex-wrap: wrap; gap: 12px 22px; margin: 0 0 8px; padding: 0; color: var(--muted); font-size: 12px; list-style: none; }
.spec-legend li { display: inline-flex; align-items: center; gap: 7px; }
.syntax-swatch { width: 9px; height: 9px; border-radius: 50%; }
.syntax-tag { color: #55c8ff; }
.syntax-props { color: #ffb52e; }
.syntax-children { color: #91bdff; }
.syntax-swatch.syntax-tag { background: #55c8ff; }
.syntax-swatch.syntax-props { background: #ffb52e; }
.syntax-swatch.syntax-children { background: #91bdff; }

.notice-section { padding: 0 0 96px; }
.notice-card { display: flex; align-items: center; justify-content: space-between; gap: 40px; padding: clamp(25px, 5vw, 48px); border-radius: 12px; color: var(--surface); background: var(--brand-strong); }
.notice-card .eyebrow { color: #dceaff; }
.notice-card h2 { max-width: 700px; margin-bottom: 12px; font-size: clamp(27px, 4vw, 40px); line-height: 1.1; letter-spacing: -.05em; }
.notice-card p:last-child { max-width: 740px; margin: 0; color: #dceaff; font-size: 14px; line-height: 1.75; overflow-wrap: anywhere; }
.notice-card .button { flex: 0 0 auto; border-color: #d4e5ff; color: var(--brand-strong); background: var(--surface); }
.notice-card .button:hover { background: var(--brand-soft); }

.site-footer { padding: 38px 0 24px; color: #d5e0ef; background: var(--ink); }
.footer-layout { display: grid; gap: 30px; }
.footer-sitemap { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; padding-bottom: 30px; border-bottom: 1px solid #34465e; }
.footer-group { display: grid; align-content: start; justify-items: start; gap: 10px; }
.footer-group h2 { margin: 0 0 4px; color: #a8b8ce; font: 700 11px/1.5 var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.footer-group a { color: #edf4ff; font-size: 13px; line-height: 1.5; }
.footer-group a:hover { color: #91bdff; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.footer-brand { color: white; }
.footer-brand .brand-logo { filter: brightness(0) invert(1); }
.footer-brand:hover { opacity: .8; }
.footer-inner p { margin: 0; color: #a8b8ce; font-size: 12px; }
.footer-inner > a:last-child { font-size: 13px; font-weight: 650; }

@media (max-width: 760px) {
  .shell { width: min(100% - 36px, 1120px); }
  .nav-shell { align-items: flex-start; padding: 17px 0; }
  .site-header nav { justify-content: flex-end; gap: 11px 16px; font-size: 12px; }
  .showcase-grid, .feature-grid, .playground-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 0; }
  .card-index { margin-bottom: 24px; }
  .notice-card { align-items: flex-start; flex-direction: column; gap: 22px; }
  .playground-heading { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 480px) {
  .shell { width: calc(100% - 28px); }
  .nav-shell { display: block; }
  .site-header nav { justify-content: flex-start; margin-top: 15px; }
  .hero { padding-top: 66px; }
  .hero h1 { font-size: 48px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .playground-editor textarea, .playground-output iframe { min-height: 320px; }
  pre { padding: 18px; font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  /* biome-ignore lint/complexity/noImportantStyles: Override animations to honor the user's motion preference. */
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}