:root {
  color-scheme: dark;
  --ink: #f5f5f7;
  --muted: #b8b8bd;
  --dim: #a0a0a8;
  --paper: #303033;
  --panel: #272729;
  --panel-2: #363639;
  --line: rgba(255, 255, 255, .10);
  --line-strong: rgba(255, 255, 255, .22);
  --yellow: #69b7ff;
  --yellow-dim: #699fdb;
  --red: #ff755a;
  --radius: 18px;
  --sans: -apple-system, BlinkMacSystemFont, ui-sans-serif, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --serif: var(--sans);
}

* { box-sizing: border-box; }
html { background: var(--paper); scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 15px/1.6 var(--sans); letter-spacing: -.01em; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }

.shell { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }
.skip-link { position: fixed; top: 10px; left: 10px; z-index: 4; padding: 8px 12px; background: var(--yellow); color: #111; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.nav { display: flex; align-items: center; justify-content: space-between; min-height: 84px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 650; letter-spacing: -.03em; }
.brand small { display: block; color: var(--dim); font: 10px var(--mono); letter-spacing: .04em; text-transform: uppercase; }
.mark { width: 36px; height: 36px; display: block; flex: 0 0 auto; object-fit: contain; }
.nav-links { display: flex; align-items: center; gap: 28px; color: var(--muted); font-size: 13px; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--ink); }
.nav-cta { padding: 9px 14px; border: 1px solid var(--line-strong); border-radius: 999px; color: var(--ink); }
.nav-cta:hover, .nav-cta:focus-visible { border-color: var(--yellow); color: var(--yellow); }
.menu-button { display: none; border: 0; color: var(--ink); background: transparent; cursor: pointer; }

.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--yellow); font: 11px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--yellow); box-shadow: 0 0 14px var(--yellow); }
.hero { display: grid; grid-template-columns: minmax(0, .88fr) minmax(390px, 1.12fr); gap: clamp(32px, 4vw, 60px); align-items: center; min-height: 655px; padding: 76px 0 92px; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 650px; margin-bottom: 25px; font: 650 clamp(42px, 5.2vw, 66px)/1.06 var(--serif); letter-spacing: -.045em; }
h1 em { color: var(--yellow); font-style: normal; }
.hero-copy > p { max-width: 480px; margin-bottom: 32px; color: var(--muted); font-size: 17px; line-height: 1.62; }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 11px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 44px; padding: 0 17px; border: 1px solid var(--line-strong); border-radius: 9px; color: var(--ink); font-weight: 630; font-size: 13px; cursor: pointer; }
.button:hover, .button:focus-visible { border-color: var(--yellow); color: var(--yellow); }
.button.primary { border-color: var(--yellow); background: var(--yellow); color: #151510; }
.button.primary:hover, .button.primary:focus-visible { background: #a3d3ff; color: #151510; }
.button.is-disabled { border-color: var(--line); background: transparent; color: var(--dim); cursor: not-allowed; }
.button.is-disabled::after { content: "— not open"; color: var(--dim); font: 10px var(--mono); font-weight: 400; }
.fineprint { margin: 16px 0 0; color: var(--dim); font: 11px/1.5 var(--mono); }

.app-preview { margin: 0; min-width: 0; }
.app-preview img { display: block; width: 100%; height: auto; }
.app-preview figcaption { margin: 10px 22px 0; color: var(--muted); font-size: 12px; line-height: 1.5; }
.mock-label { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; color: var(--dim); font: 10px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.mock-label span:last-child { color: var(--yellow); }
.mock-text { margin: 0; color: var(--muted); font: 14px/1.75 var(--mono); }
.mock-text strong { color: var(--ink); font-weight: 500; }
.mock-divider { height: 1px; margin: 22px 0; background: var(--line); }
.mock-output { padding: 16px; border: 1px solid rgba(105,183,255,.28); border-radius: 10px; background: rgba(105,183,255,.06); }
.mock-output .mock-text { color: var(--ink); }
.mock-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 23px; padding-top: 15px; border-top: 1px solid var(--line); color: var(--dim); font: 10px var(--mono); }
.key { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); }
.key kbd { padding: 3px 6px; border: 1px solid var(--line-strong); border-radius: 4px; font: 10px var(--mono); }

.strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.strip-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.strip-item { padding: 23px 24px; border-right: 1px solid var(--line); }
.strip-item:last-child { border-right: 0; }
.strip-item b { display: block; margin-bottom: 3px; font-size: 14px; }
.strip-item span { color: var(--muted); font-size: 13px; }

.section { padding: 120px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 48px; }
.section h2 { max-width: 560px; margin-bottom: 0; font: 600 clamp(30px, 4vw, 46px)/1.12 var(--serif); letter-spacing: -.055em; }
.section-head > p { max-width: 320px; margin-bottom: 2px; color: var(--muted); }
.mode-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.mode-card { min-height: 290px; padding: 27px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.mode-card:hover { border-color: var(--line-strong); }
.mode-no { display: flex; align-items: center; justify-content: space-between; margin-bottom: 60px; color: var(--yellow); font: 11px var(--mono); }
.mode-no span:last-child { color: var(--dim); }
.mode-card h3 { margin-bottom: 11px; font-size: 20px; letter-spacing: -.04em; }
.mode-card p { max-width: 390px; margin-bottom: 0; color: var(--muted); }
.mode-card .mode-hotkey { margin-top: 24px; color: var(--dim); font: 11px var(--mono); }
.demo { display: grid; grid-template-columns: .72fr 1.28fr; gap: 14px; margin-top: 14px; padding: 14px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.demo-input, .demo-result { padding: 22px; border-radius: 12px; background: var(--panel-2); }
.demo-input { border: 1px solid var(--line); }
.demo-tabs { display: flex; gap: 7px; margin: 15px 0 18px; }
.demo-tab { padding: 7px 9px; border: 1px solid var(--line); border-radius: 6px; color: var(--muted); background: transparent; font: 10px var(--mono); cursor: pointer; }
.demo-tab:hover, .demo-tab:focus-visible, .demo-tab.is-selected { border-color: var(--yellow); color: var(--yellow); }
.demo-input p, .demo-result p { margin-bottom: 0; color: var(--muted); font: 13px/1.65 var(--mono); }
.demo-input strong, .demo-result strong { color: var(--ink); font-weight: 500; }
.demo-result { border: 1px solid rgba(105,183,255,.28); background: rgba(105,183,255,.06); }
.demo-result .mock-label { margin-bottom: 20px; }
.demo-caption { margin: 13px 0 0; color: var(--dim); font: 10px var(--mono); }

.dark-band { background: #28282a; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 38px; }
.step { padding-top: 19px; border-top: 1px solid var(--line-strong); }
.step-index { margin-bottom: 34px; color: var(--yellow); font: 11px var(--mono); }
.step h3 { margin-bottom: 9px; font-size: 18px; letter-spacing: -.03em; }
.step p { margin-bottom: 0; color: var(--muted); }

.rules { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: start; }
.rules h2 { margin-bottom: 0; }
.rule-list { margin: 0; padding: 0; list-style: none; }
.rule-list li { display: grid; grid-template-columns: 24px 1fr; gap: 12px; padding: 17px 0; border-top: 1px solid var(--line); }
.rule-list li:last-child { border-bottom: 1px solid var(--line); }
.rule-list i { width: 18px; height: 18px; margin-top: 3px; border: 1px solid var(--yellow-dim); border-radius: 50%; position: relative; }
.rule-list i::after { content: ""; position: absolute; width: 5px; height: 5px; top: 5px; left: 5px; border-radius: 50%; background: var(--yellow); }
.rule-list b { display: block; margin-bottom: 2px; font-size: 14px; }
.rule-list span { color: var(--muted); font-size: 13px; }

.cta { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 40px; padding: 40px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: linear-gradient(125deg, #38383c, #29292c); }
.cta h2 { max-width: 620px; margin-bottom: 10px; font: 500 clamp(30px, 4vw, 48px)/1.05 var(--serif); letter-spacing: -.05em; }
.cta p { max-width: 570px; margin-bottom: 0; color: var(--muted); }

.footer { padding: 34px 0 44px; border-top: 1px solid var(--line); color: var(--dim); font-size: 12px; }
.footer-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer a:hover, .footer a:focus-visible { color: var(--ink); }

.page-hero { padding: 90px 0 75px; border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 760px; margin: 18px 0 20px; font-size: clamp(46px, 7vw, 78px); }
.page-hero p { max-width: 620px; margin-bottom: 0; color: var(--muted); font-size: 17px; }
.prose { max-width: 820px; padding: 74px 0 112px; }
.prose h2 { margin: 50px 0 14px; font: 500 31px/1.1 var(--serif); letter-spacing: -.04em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin: 29px 0 7px; font-size: 16px; }
.prose p, .prose li { color: var(--muted); }
.prose ul, .prose ol { padding-left: 22px; }
.prose li + li { margin-top: 7px; }
.prose code { padding: 2px 5px; border-radius: 4px; background: var(--panel-2); color: var(--yellow); font: .9em var(--mono); }
.note { margin: 26px 0; padding: 18px 20px; border-left: 2px solid var(--yellow); background: rgba(105,183,255,.06); }
.note p { margin: 0; }
.unknown { color: var(--yellow) !important; }
.table-wrap { overflow-x: auto; margin: 25px 0; }
table { width: 100%; min-width: 620px; border-collapse: collapse; font-size: 13px; }
th, td { padding: 12px 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--ink); background: var(--panel); font-weight: 600; }
td { color: var(--muted); }

@media (max-width: 820px) {
  .shell { width: min(100% - 34px, 680px); }
  .nav { min-height: 70px; }
  .menu-button { display: block; padding: 10px 0 10px 10px; }
  .menu-button span { display: block; width: 19px; height: 1px; margin: 4px 0; background: var(--ink); }
  .nav-links { display: none; position: absolute; z-index: 3; top: 69px; left: 17px; right: 17px; padding: 15px; border: 1px solid var(--line-strong); border-radius: 12px; background: var(--panel); box-shadow: 0 20px 50px #000; }
  .nav-links.is-open { display: grid; gap: 0; }
  .nav-links a { padding: 10px 4px; }
  .nav-cta { text-align: center; }
  .hero { grid-template-columns: 1fr; min-height: 0; padding: 72px 0 80px; }
  h1 { font-size: clamp(40px, 10vw, 60px); }
  .app-preview { max-width: 600px; margin-inline: auto; }
  .rules { grid-template-columns: 1fr; gap: 44px; }
  .demo { grid-template-columns: 1fr; }
  .section { padding: 84px 0; }
  .section-head { display: block; margin-bottom: 33px; }
  .section-head > p { margin-top: 17px; }
  .cta { grid-template-columns: 1fr; padding: 28px; }
}
@media (max-width: 560px) {
  .shell { width: min(100% - 28px, 500px); }
  .brand small { display: none; }
  .strip-grid, .mode-grid, .steps { grid-template-columns: 1fr; }
  .strip-item { border-right: 0; border-bottom: 1px solid var(--line); }
  .strip-item:last-child { border-bottom: 0; }
  .mode-card { min-height: 0; }
  .mode-no { margin-bottom: 38px; }
  .mock-body { padding: 20px 17px; }
  .mock-text { font-size: 12px; }
  .footer-row { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

.mode-card:nth-child(2) .mode-no { color: #dd8bf4; }
:focus-visible { outline: 2px solid var(--yellow); outline-offset: 4px; }