:root {
  color-scheme: light;
  --bg: #fbf9f5;
  --paper: #ffffff;
  --paper-soft: #f5f3ef;
  --paper-strong: #efeeea;
  --ink: #1b1c1a;
  --muted: #484552;
  --line: #c9c4d4;
  --primary: #26067b;
  --primary-soft: #e6deff;
  --secondary: #5a55a2;
  --rose: #f7b2d7;
  --rose-soft: #ffd8ea;
  --shadow: 0 18px 48px rgba(48, 49, 46, 0.06);
  --serif: "Noto Serif SC", "Noto Serif CJK SC", "Songti SC", SimSun, serif;
  --sans: "Hanken Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100%;
  margin: 0;
  background:
    linear-gradient(180deg, rgba(230, 222, 255, 0.24), rgba(251, 249, 245, 0) 320px),
    var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  letter-spacing: 0;
}

a {
  color: var(--primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--secondary);
}

.site-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 28px 24px 40px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0 28px;
  border-bottom: 1px solid rgba(38, 6, 123, 0.1);
  font-family: var(--sans);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--primary);
  box-shadow: 12px 0 0 var(--rose);
}

.brand-sub {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  font-size: 14px;
  font-weight: 600;
}

.nav a {
  text-decoration: none;
}

.hero,
.document,
.status-panel {
  margin-top: 48px;
}

.hero {
  display: grid;
  gap: 32px;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  align-items: end;
}

.eyebrow,
.kicker {
  margin: 0 0 14px;
  color: var(--secondary);
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 16px;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: var(--primary);
  font-family: var(--serif);
  letter-spacing: 0;
}

h1 {
  max-width: 13ch;
  margin: 0;
  font-size: clamp(36px, 8vw, 64px);
  line-height: 1.08;
}

h2 {
  margin: 48px 0 14px;
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1.25;
}

h3 {
  margin: 28px 0 10px;
  font-size: 21px;
  line-height: 1.35;
}

p,
li {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

p {
  margin: 14px 0 0;
}

ol,
ul {
  margin: 14px 0 0;
  padding-left: 1.45em;
}

li + li {
  margin-top: 8px;
}

.lede {
  max-width: 62ch;
  font-size: clamp(18px, 2.4vw, 21px);
  line-height: 1.7;
}

.panel {
  border-radius: 16px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.note-panel {
  padding: 22px;
  border: 1px solid rgba(38, 6, 123, 0.1);
  background: rgba(255, 255, 255, 0.74);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
  line-height: 18px;
}

.chip.alt {
  background: var(--rose-soft);
  color: #693654;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: #ffffff;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  line-height: 20px;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.button.secondary {
  background: transparent;
  color: var(--primary);
}

.button:hover {
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(38, 6, 123, 0.14);
}

.button.secondary:hover {
  color: var(--primary);
}

.document {
  display: grid;
  grid-template-columns: minmax(180px, 240px) minmax(0, 760px);
  gap: 48px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 24px;
  padding: 18px;
  border-radius: 12px;
  background: var(--paper-soft);
  font-family: var(--sans);
}

.toc-title {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.toc a {
  display: block;
  padding: 7px 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 20px;
  text-decoration: none;
}

.toc a:hover {
  color: var(--primary);
}

.doc-body {
  padding: clamp(26px, 5vw, 48px);
}

.doc-body h1 {
  max-width: 16ch;
}

.doc-body section {
  padding-top: 2px;
}

.doc-body section + section {
  margin-top: 6px;
}

.rule-block {
  margin-top: 22px;
  padding: 18px;
  border-left: 4px solid var(--secondary);
  border-radius: 0 8px 8px 0;
  background: var(--paper-soft);
}

.site-footer {
  margin-top: 64px;
  padding-top: 28px;
  border-top: 1px solid rgba(38, 6, 123, 0.1);
  color: var(--muted);
  font-family: var(--sans);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 14px;
}

.footer-links a {
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.footer-copy {
  max-width: 88ch;
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
}

@media (max-width: 760px) {
  .site-shell {
    padding: 22px 18px 34px;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero,
  .document {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 34px;
  }

  .toc {
    position: static;
  }

  .doc-body {
    padding: 24px 18px;
  }
}