:root {
  color-scheme: light dark;
  --ink: #15171a;
  --muted: #5d6673;
  --paper: #f7f5ef;
  --panel: #ffffff;
  --line: #d8d2c5;
  --accent: #0f7a67;
  --accent-ink: #073f35;
  --warn: #8b5e16;
  --shadow: 0 24px 70px rgba(28, 30, 32, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f2f1eb;
    --muted: #b9b5aa;
    --paper: #161713;
    --panel: #20221d;
    --line: #3b3c34;
    --accent: #57c7ad;
    --accent-ink: #baf1e4;
    --warn: #e0b45f;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  }
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  line-height: 1.55;
}

body {
  margin: 0;
}

.shell {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
}

.hero {
  padding: 64px 0 38px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--accent-ink);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mark {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 14px 0 0 color-mix(in srgb, var(--accent) 62%, transparent);
}

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

h1 {
  max-width: 820px;
  margin: 18px 0 16px;
  font-size: clamp(2.45rem, 6vw, 5.7rem);
  line-height: 0.94;
  font-weight: 650;
}

.lede {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  font-size: clamp(1.02rem, 1.7vw, 1.22rem);
}

.meta-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.meta-item {
  padding: 18px;
  background: var(--paper);
}

.meta-label {
  display: block;
  color: var(--muted);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.meta-value {
  display: block;
  margin-top: 6px;
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  font-size: 0.98rem;
  font-weight: 650;
}

main {
  padding: 44px 0 72px;
}

.layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 34px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 22px;
  padding: 20px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 86%, transparent);
  box-shadow: var(--shadow);
}

.toc h2 {
  margin-bottom: 14px;
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.toc a {
  display: block;
  padding: 8px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  font-size: 0.95rem;
  text-decoration: none;
}

.toc a:hover,
.toc a:focus-visible {
  color: var(--accent-ink);
}

.policy {
  padding: 34px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

section + section {
  margin-top: 38px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(1.5rem, 2.4vw, 2.15rem);
  line-height: 1.08;
}

h3 {
  margin: 24px 0 8px;
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  font-size: 1rem;
}

p,
li {
  color: var(--muted);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
}

ul {
  margin: 10px 0 0;
  padding-left: 1.2rem;
}

a {
  color: var(--accent-ink);
  text-decoration-color: color-mix(in srgb, var(--accent) 58%, transparent);
  text-underline-offset: 0.18em;
}

.notice {
  margin: 20px 0 0;
  padding: 18px;
  border-left: 4px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.note {
  color: var(--warn);
}

.footer {
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  font-size: 0.9rem;
}

@media (max-width: 820px) {
  .hero {
    padding-top: 42px;
  }

  .meta-strip,
  .layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

  .policy {
    padding: 24px;
  }
}