:root{--ink:var(--vd-foreground);--muted:var(--vd-muted-foreground);--paper:var(--vd-background);--white:var(--vd-surface);--line:var(--vd-border);--teal:var(--vd-ledger);--mint:var(--vd-ledger-soft);--amber:var(--vd-amber);--orange:var(--vd-amber);--serif: Georgia, "Times New Roman", serif;--sans: "Aptos", "Segoe UI", Arial, sans-serif}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
.wrap { width: min(1240px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: absolute; top: -60px; left: 20px; z-index: 10; padding: 12px 16px; background: var(--ink); color: var(--vd-on-dark); }
.skip-link:focus { top: 12px; }
.topbar { min-height: 82px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.wordmark { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-size: 14px; letter-spacing: .12em; font-weight: 800; }
.mark { width: 36px; height: 36px; display: grid; place-items: center; border: 1.5px solid var(--ink); border-radius: 11px 11px 11px 3px; color: var(--teal); letter-spacing: -.08em; font-size: 13px; }
.top-link, .text-link { text-decoration: none; font-weight: 700; font-size: 16px; }
.top-link span, .text-link span { color: var(--teal); margin-left: 8px; }
.hero { min-height: 690px; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 64px; padding-block: 88px 102px; }
.eyebrow { color: var(--teal); font-size: 13px; line-height: 1.4; letter-spacing: .14em; font-weight: 800; }
.hero .eyebrow { display: flex; align-items: center; gap: 10px; }
.live-dot { width: 9px; height: 9px; background: var(--orange); border-radius: 50%; box-shadow: 0 0 0 5px color-mix(in oklab, var(--vd-shadow-tint) 11%, transparent); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin: 23px 0 25px; font-size: clamp(58px, 7.3vw, 96px); letter-spacing: -.075em; line-height: .94; font-weight: 800; }
h1 span, .closing h2 span { color: var(--teal); font-family: var(--serif); font-weight: 400; font-style: italic; letter-spacing: -.06em; }
.hero-lede { max-width: 540px; color: var(--muted); font-size: 20px; line-height: 1.65; }
.button { margin-top: 18px; display: inline-flex; gap: 38px; align-items: center; padding: 15px 19px; color: var(--white); background: var(--ink); border-radius: 5px; text-decoration: none; font-weight: 700; font-size: 14px; transition: transform .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); background: var(--teal); }
.button span { color: var(--amber); font-size: 18px; }
.stage-note { max-width: 470px; margin-top: 26px; color: var(--muted); font-size: 15px; line-height: 1.65; }
.stage-note strong { color: var(--ink); }
.hero-visual { position: relative; overflow: hidden; min-height: 488px; padding: 24px; background: var(--vd-muted); border: 1px solid var(--vd-border); border-radius: 9px; box-shadow: 0 24px 70px color-mix(in oklab, var(--vd-shadow-tint) 8%, transparent); }
.hero-visual::before { position: absolute; inset: 0; content: ""; opacity: .34; background-image: linear-gradient(color-mix(in oklab, var(--vd-border-strong) 20%, transparent) 1px, transparent 1px), linear-gradient(90deg, color-mix(in oklab, var(--vd-border-strong) 20%, transparent) 1px, transparent 1px); background-size: 29px 29px; }
.visual-top, .visual-foot, .task-card, .trace { position: relative; z-index: 1; }
.visual-top, .visual-foot { display: flex; align-items: center; justify-content: space-between; font-size: 12px; letter-spacing: .08em; font-weight: 800; color: var(--vd-foreground); }
.status { display: inline-flex; align-items: center; gap: 7px; color: var(--teal); }
.status i, .stamp-dot { width: 7px; height: 7px; display: inline-block; background: var(--teal); border-radius: 50%; }
.task-card { width: 78%; margin: 40px auto 18px; padding: 25px 27px; background: var(--white); border: 1px solid var(--line); border-radius: 7px; box-shadow: 0 12px 28px color-mix(in oklab, var(--vd-shadow-tint) 7%, transparent); }
.card-index { font-size: 12px; color: var(--vd-amber); letter-spacing: .08em; font-weight: 800; }
.task-card h2 { margin: 12px 0 20px; font-size: clamp(27px, 3.2vw, 39px); line-height: 1.08; letter-spacing: -.045em; }
.approval { display: flex; align-items: center; gap: 11px; border-top: 1px solid var(--vd-border); padding-top: 14px; }
.approval-icon { display: grid; place-items: center; width: 27px; height: 27px; border-radius: 50%; background: var(--mint); color: var(--teal); font-weight: 900; }
.approval b, .approval small { display: block; }
.approval b { font-size: 14px; }
.approval small { margin-top: 4px; color: var(--muted); font-size: 12px; }
.trace { width: 90%; margin: 0 auto 20px; padding: 3px 15px; background: color-mix(in oklab, var(--vd-surface) 92%, transparent); border: 1px solid var(--line); border-radius: 5px; }
.trace-row { display: grid; grid-template-columns: 27px 1fr auto; gap: 9px; align-items: center; min-height: 42px; border-bottom: 1px solid var(--vd-border); font-size: 12px; }
.trace-row:last-child { border-bottom: 0; }
.trace-num { color: var(--vd-muted-foreground); font-variant-numeric: tabular-nums; }
.trace-row b { font-size: 12px; letter-spacing: .03em; }
.ok, .check { color: var(--teal); }
.warn { color: var(--vd-amber); }
.visual-foot { justify-content: center; gap: 11px; }
.orbit { position: absolute; border: 1px solid color-mix(in oklab, var(--vd-ledger) 12%, transparent); border-radius: 50%; }
.orbit-one { width: 180px; height: 180px; right: -66px; top: 60px; }
.orbit-two { width: 280px; height: 280px; right: -116px; top: 10px; }
.principle-band { background: var(--ink); color: var(--white); }
.principle-inner { min-height: 230px; display: flex; align-items: center; position: relative; }
.principle-inner > p { align-self: flex-start; margin: 38px 38px 0 0; color: var(--amber); font-size: 12px; letter-spacing: .14em; font-weight: 800; }
.principle-inner h2 { margin: 0; font-size: clamp(27px, 4.2vw, 49px); line-height: 1.12; letter-spacing: -.04em; }
.principle-mark { margin-left: auto; color: var(--amber); font-size: 55px; }
.method { display: grid; grid-template-columns: .7fr 1.3fr; gap: 100px; padding-block: 122px 130px; }
.section-intro h2, .boundary h2 { margin: 17px 0 20px; font-size: clamp(42px, 5vw, 62px); letter-spacing: -.065em; line-height: .98; }
.section-intro > p:last-child { max-width: 390px; color: var(--muted); font-size: 17px; line-height: 1.7; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; align-self: center; }
.step { min-height: 250px; padding: 20px 17px; border-top: 2px solid var(--teal); background: color-mix(in oklab, var(--vd-surface) 54%, transparent); }
.step > span { color: var(--vd-amber); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.step h3 { margin: 38px 0 12px; font-size: 20px; letter-spacing: -.03em; }
.step p { color: var(--muted); font-size: 15px; line-height: 1.65; }
.step small { display: block; margin-top: 21px; color: var(--teal); font-size: 12px; letter-spacing: .06em; font-weight: 800; }
.boundary { padding-block: 92px; background: var(--vd-muted); border-block: 1px solid var(--vd-border); }
.boundary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; align-items: start; }
.boundary h2 { font-size: clamp(38px, 4.5vw, 56px); }
.boundary-copy p { color: var(--vd-foreground); font-size: 18px; line-height: 1.75; }
.boundary-stamp { display: inline-flex; align-items: center; gap: 9px; margin-top: 10px; padding: 11px 13px; border: 1px solid var(--vd-border-strong); color: var(--teal); font-size: 12px; letter-spacing: .08em; font-weight: 800; }
.closing { position: relative; padding-block: 108px 112px; }
.closing h2 { max-width: 700px; margin: 18px 0; font-size: clamp(47px, 6.4vw, 78px); letter-spacing: -.07em; line-height: .97; }
.closing > p:not(.eyebrow) { max-width: 560px; margin: 24px 0 27px; color: var(--muted); font-size: 18px; line-height: 1.7; }
.text-link { display: inline-flex; padding-block: 8px; border-bottom: 1px solid var(--teal); }
.footer { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.footer .wordmark { color: var(--ink); font-size: 12px; }

@media (max-width: 900px) {
  .hero { gap: 34px; grid-template-columns: 1fr 1fr; }
  .method { grid-template-columns: 1fr; gap: 38px; }
  .section-intro > p:last-child { max-width: 520px; }
  .boundary-grid { gap: 45px; }
}
@media (max-width: 650px) {
  .wrap { width: min(100% - 36px, 520px); }
  .topbar { min-height: 68px; }
  .wordmark { font-size: 12px; letter-spacing: .08em; }
  .top-link { font-size: 14px; }
  .hero { display: flex; flex-direction: column; align-items: stretch; gap: 39px; padding-block: 66px 69px; }
  h1 { font-size: clamp(58px, 15vw, 82px); }
  .hero-lede { font-size: 18px; }
  .hero-visual { min-height: 425px; padding: 18px; }
  .task-card { width: 88%; margin-top: 34px; padding: 22px; }
  .trace { width: 96%; padding-inline: 9px; }
  .trace-row { grid-template-columns: 22px 1fr auto; gap: 7px; font-size: 12px; }
  .trace-row b { font-size: 12px; }
  .visual-foot { flex-wrap: wrap; gap: 6px 9px; text-align: center; }
  .principle-inner { min-height: 200px; align-items: flex-start; flex-direction: column; justify-content: center; gap: 20px; }
  .principle-inner > p { margin: 0; font-size: 12px; }
  .principle-inner h2 { font-size: 34px; }
  .principle-mark { position: absolute; right: 0; bottom: 27px; font-size: 32px; }
  .method { padding-block: 79px 83px; }
  .steps { grid-template-columns: 1fr; gap: 10px; }
  .step { min-height: 0; padding: 18px; }
  .step h3 { margin: 16px 0 8px; }
  .step p { max-width: 400px; }
  .step small { margin-top: 13px; }
  .boundary-copy p { font-size: 17px; }
  .boundary-stamp { font-size: 11px; }
  .boundary { padding-block: 70px; }
  .boundary-grid { grid-template-columns: 1fr; gap: 15px; }
  .closing { padding-block: 80px; }
  .footer { padding-block: 22px; align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}