/* PROOFDESK website — calm dev-tool aesthetic. No external fonts. */
:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --ink: #0f172a;
  --ink-2: #334155;
  --muted: #475569;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --accent: #0e7490;
  --accent-strong: #155e75;
  --accent-text: #0e7490;
  --accent-soft: #ecfeff;
  --on-accent: #ffffff;
  --ok: #166534; --ok-bg: #dcfce7; --ok-line: #86efac;
  --bad: #991b1b; --bad-bg: #fee2e2; --bad-line: #fca5a5;
  --warn: #92400e; --warn-bg: #fef3c7; --warn-line: #fcd34d;
  --ext: #5b21b6; --ext-bg: #ede9fe; --ext-line: #c4b5fd;
  --neutral: #334155; --neutral-bg: #e2e8f0; --neutral-line: #cbd5e1;
  --obs: #075985; --obs-bg: #e0f2fe; --obs-line: #7dd3fc;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px -12px rgba(15, 23, 42, .18);
  --radius: 14px;
  --radius-sm: 9px;
  --focus: 0 0 0 3px var(--bg), 0 0 0 5px var(--accent);
  --font: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "Cascadia Mono", Consolas, "Liberation Mono", Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1220; --surface: #111a2b; --surface-2: #0e1626; --ink: #e5edf6; --ink-2: #cbd5e1; --muted: #9fb0c5;
    --line: #1f2b3e; --line-strong: #2c3a52; --accent: #0e7490; --accent-strong: #0b5f75; --accent-text: #67e8f9; --accent-soft: #0b2a33;
    --ok: #86efac; --ok-bg: #052e1a; --ok-line: #166534;
    --bad: #fca5a5; --bad-bg: #3b0d0d; --bad-line: #991b1b;
    --warn: #fcd34d; --warn-bg: #3a2405; --warn-line: #92400e;
    --ext: #c4b5fd; --ext-bg: #24124a; --ext-line: #5b21b6;
    --neutral: #cbd5e1; --neutral-bg: #1e293b; --neutral-line: #334155;
    --obs: #7dd3fc; --obs-bg: #082f49; --obs-line: #075985;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px -12px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b1220; --surface: #111a2b; --surface-2: #0e1626; --ink: #e5edf6; --ink-2: #cbd5e1; --muted: #9fb0c5;
  --line: #1f2b3e; --line-strong: #2c3a52; --accent: #0e7490; --accent-strong: #0b5f75; --accent-text: #67e8f9; --accent-soft: #0b2a33;
  --ok: #86efac; --ok-bg: #052e1a; --ok-line: #166534;
  --bad: #fca5a5; --bad-bg: #3b0d0d; --bad-line: #991b1b;
  --warn: #fcd34d; --warn-bg: #3a2405; --warn-line: #92400e;
  --ext: #c4b5fd; --ext-bg: #24124a; --ext-line: #5b21b6;
  --neutral: #cbd5e1; --neutral-bg: #1e293b; --neutral-line: #334155;
  --obs: #7dd3fc; --obs-bg: #082f49; --obs-line: #075985;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px -12px rgba(0, 0, 0, .6);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }
body {
  margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font);
  font-size: 1rem; line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden; font-feature-settings: 'calt' 0;
  overflow-wrap: break-word;
}
:lang(ko) body, body:lang(ko) { font-family: Inter, "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", "Noto Sans CJK KR", system-ui, sans-serif; word-break: keep-all; }
:lang(ja) body, body:lang(ja) { font-family: Inter, "Hiragino Sans", "Yu Gothic UI", "Meiryo", "Noto Sans JP", "Noto Sans CJK JP", system-ui, sans-serif; line-break: strict; }
body:lang(zh-CN) { font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Noto Sans CJK SC", system-ui, sans-serif; }
body:lang(zh-TW) { font-family: Inter, "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", "Noto Sans CJK TC", system-ui, sans-serif; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: var(--accent-text); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 6px; }
main:focus { outline: none; }
h1, h2, h3 { color: var(--ink); line-height: 1.2; letter-spacing: -0.015em; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 4.4vw, 3.25rem); font-weight: 750; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.125rem); font-weight: 700; }
h3 { font-size: 1.0625rem; font-weight: 650; }
p { margin: 0 0 1em; }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.icon { width: 20px; height: 20px; flex: none; }
.icon-sm { width: 16px; height: 16px; }
.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 820px; }
.center { text-align: center; }
@media (max-width: 480px) { .container { padding: 0 16px; } }

.skip-link { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--ink); color: var(--bg); padding: 10px 14px; border-radius: 8px; font-weight: 600; text-decoration: none; }
.skip-link:focus { top: 12px; }

/* ---------- header ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: saturate(160%) blur(10px); -webkit-backdrop-filter: saturate(160%) blur(10px); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; gap: 20px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 800; letter-spacing: .06em; font-size: .95rem; }
.logo-mark { width: 28px; height: 28px; }
.brand-lg .logo-mark { width: 52px; height: 52px; }
.brand-lg { font-size: 1.4rem; justify-content: center; margin-bottom: 8px; }
.main-nav { display: flex; gap: 4px; margin-left: 12px; }
.main-nav a { color: var(--ink-2); text-decoration: none; font-size: .925rem; font-weight: 500; padding: 8px 10px; border-radius: 8px; }
.main-nav a:hover { background: var(--surface-2); color: var(--ink); }
.header-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
@media (max-width: 920px) { .main-nav { display: none; } }
@media (max-width: 560px) { .header-cta span { display: none; } .header-cta { padding: 8px 10px; } .lang-current { display: none; } .wordmark { font-size: .9rem; } }

.icon-btn { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--ink-2); cursor: pointer; }
.icon-btn:hover { color: var(--ink); border-color: var(--line-strong); }
.theme-toggle .icon-sun { display: none; }
.theme-toggle[aria-pressed="true"] .icon-sun { display: block; }
.theme-toggle[aria-pressed="true"] .icon-moon { display: none; }

.lang-switch { position: relative; }
.lang-switch summary { list-style: none; display: inline-flex; align-items: center; gap: 6px; height: 38px; padding: 0 10px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--ink-2); cursor: pointer; font-size: .9rem; font-weight: 500; }
.lang-switch summary::-webkit-details-marker { display: none; }
.lang-switch[open] summary { border-color: var(--accent); color: var(--ink); }
.lang-menu { position: absolute; right: 0; top: calc(100% + 6px); margin: 0; padding: 6px; list-style: none; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); min-width: 210px; max-height: 70vh; overflow: auto; z-index: 60; }
.lang-menu a { display: block; padding: 8px 10px; border-radius: 8px; color: var(--ink-2); text-decoration: none; font-size: .925rem; }
.lang-menu a:hover { background: var(--surface-2); color: var(--ink); }
.lang-menu a[aria-current="true"] { color: var(--accent-text); font-weight: 650; background: var(--accent-soft); }

/* ---------- buttons, pills, chips ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 10px; font-weight: 600; text-decoration: none; border: 1px solid transparent; cursor: pointer; font: inherit; font-weight: 600; line-height: 1.2; text-align: center; }
.btn-sm { padding: 8px 12px; font-size: .9rem; }
.btn-lg { padding: 13px 20px; font-size: 1rem; }
.btn { padding: 10px 16px; }
.btn-sm { padding: 8px 12px; }
.btn-lg { padding: 13px 20px; }
.btn-primary { background: var(--accent); color: var(--on-accent); box-shadow: 0 1px 0 rgba(255,255,255,.15) inset, 0 6px 16px -8px rgba(14,116,144,.7); }
.btn-primary:hover { background: var(--accent-strong); text-decoration: none; }
.btn-ghost { background: var(--surface); color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--ink-2); text-decoration: none; }

.pill { display: inline-flex; align-items: center; gap: 5px; padding: 2px 9px 2px 7px; border-radius: 999px; font-size: .78rem; font-weight: 650; border: 1px solid; white-space: nowrap; line-height: 1.5; }
.pill-matches { color: var(--ok); background: var(--ok-bg); border-color: var(--ok-line); }
.pill-mismatch { color: var(--bad); background: var(--bad-bg); border-color: var(--bad-line); }
.pill-inconclusive { color: var(--warn); background: var(--warn-bg); border-color: var(--warn-line); }
.pill-external { color: var(--ext); background: var(--ext-bg); border-color: var(--ext-line); }
.pill-note { color: var(--neutral); background: var(--neutral-bg); border-color: var(--neutral-line); }
.pill-observed { color: var(--obs); background: var(--obs-bg); border-color: var(--obs-line); }

.chip { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 999px; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink-2); font: inherit; font-size: .875rem; font-weight: 550; text-decoration: none; cursor: pointer; }
.chip:hover { color: var(--ink); border-color: var(--ink-2); }

.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 18px; padding: 5px 12px 5px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-text); font-size: .85rem; font-weight: 600; border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.2rem); color: var(--ink-2); max-width: 62ch; }
.fine { font-size: .875rem; color: var(--muted); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 14px; }
.cta-row.center { justify-content: center; }

/* ---------- hero ---------- */
.hero { padding: 64px 0 56px; background:
  radial-gradient(1200px 500px at 85% -10%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 60%),
  linear-gradient(to bottom, var(--bg), var(--bg)); border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 48px; align-items: center; }
.hero-copy h1 { max-width: 18ch; }
:lang(ko) .hero-copy h1, :lang(ja) .hero-copy h1, :lang(zh-CN) .hero-copy h1, :lang(zh-TW) .hero-copy h1 { max-width: 22ch; }
.hero-visual { position: relative; }
.hero-img { width: 100%; border-radius: 20px; border: 1px solid var(--line); box-shadow: var(--shadow); aspect-ratio: 3 / 2; object-fit: cover; }
:root[data-theme="dark"] .hero-img { filter: brightness(.82) saturate(.95); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .hero-img { filter: brightness(.82) saturate(.95); } }
.layers-card { margin: -120px 0 0 auto; position: relative; width: min(92%, 470px); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; }
.layers-title { display: flex; align-items: center; gap: 8px; font-weight: 650; font-size: .9rem; color: var(--ink); margin-bottom: 10px; }
.layers { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.layer { border-radius: 10px; padding: 9px 11px; background: var(--surface-2); border: 1.5px solid var(--line-strong); }
.layer p { margin: 4px 0 0; font-size: .85rem; color: var(--ink-2); line-height: 1.45; }
.layer-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.layer-kind { display: inline-flex; align-items: center; gap: 6px; font-size: .74rem; font-weight: 750; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
/* facts vs interpretation motif: border style carries meaning, not color alone */
.layer-fact { border-style: solid; border-left-width: 4px; border-left-color: var(--accent); }
.layer-signal { border-style: dashed; }
.layer-interp { border-style: dotted; border-width: 2px; background: var(--surface); }
.layer-ext { border-style: double; border-width: 3px; }
.layers-caption { display: flex; gap: 6px; align-items: flex-start; margin: 10px 0 0; font-size: .76rem; color: var(--muted); }
.layers-caption .icon { margin-top: 2px; }
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-copy h1 { max-width: none; }
  .layers-card { margin: -64px auto 0; width: calc(100% - 24px); }
}
@media (max-width: 480px) { .hero { padding: 40px 0 40px; } .layers-card { margin-top: -32px; width: calc(100% - 12px); padding: 12px; } }

/* ---------- sections ---------- */
.section { padding: 84px 0; }
.section-tight { padding: 32px 0 72px; }
.section-alt { background: var(--surface-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.narrow-head { margin-bottom: 36px; }
.narrow-head > * { max-width: 780px; }
.section-sub { color: var(--ink-2); font-size: 1.0625rem; max-width: 68ch; }
@media (max-width: 640px) { .section { padding: 60px 0; } }

.problem-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.problem-item { border-top: 2px solid var(--line-strong); padding-top: 16px; }
.problem-item h3 { display: flex; gap: 8px; align-items: flex-start; }
.problem-item h3 .icon { color: var(--accent-text); margin-top: 1px; }
.problem-item p { color: var(--ink-2); margin: 0; }
.pillars { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 48px; }
.pillar { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.pillar img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.pillar-body { padding: 18px 20px 20px; }
.pillar-body p { color: var(--ink-2); margin: 0; }
@media (max-width: 860px) { .problem-grid, .pillars { grid-template-columns: 1fr; } }

.steps { list-style: none; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; counter-reset: step; }
.step { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 20px; }
.step-num { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 9px; background: var(--accent); color: var(--on-accent); font-weight: 750; margin-bottom: 14px; font-variant-numeric: tabular-nums; }
.step p { color: var(--ink-2); margin: 0; font-size: .95rem; }
@media (max-width: 1000px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

.feature-grid { list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.feature { background: var(--surface); padding: 26px 24px; }
.feature-icon { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; background: var(--accent-soft); color: var(--accent-text); margin-bottom: 14px; border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent); }
.feature p { color: var(--ink-2); margin: 0; font-size: .95rem; }
@media (max-width: 900px) { .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 580px) { .feature-grid { grid-template-columns: 1fr; } }

.origma-grid, .trust-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 48px; align-items: start; }
@media (max-width: 900px) { .origma-grid, .trust-grid { grid-template-columns: 1fr; gap: 32px; } }
.check-list, .not-list { list-style: none; padding: 0; margin: 0 0 20px; display: grid; gap: 10px; }
.check-list li, .not-list li { display: flex; gap: 10px; align-items: flex-start; color: var(--ink-2); }
.check-list .icon { color: var(--ok); margin-top: 4px; }
.not-list li { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; color: var(--ink); }
.not-list .icon { color: var(--bad); margin-top: 4px; }
.text-link { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; }
.roles { display: grid; gap: 0; }
.role { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.role h3 { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.role h3 .logo-mark { width: 24px; height: 24px; }
.role p { color: var(--ink-2); margin: 0; }
.role-o { border-style: double; border-width: 3px; border-color: var(--ext-line); }
.role-link { display: grid; place-items: center; height: 40px; color: var(--muted); }
.vocab { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.vocab dl { margin: 0; display: grid; gap: 14px; }
.vocab dl > div { display: grid; gap: 6px; }
.vocab dd { margin: 0; color: var(--ink-2); font-size: .95rem; }

.faq-list { display: grid; gap: 10px; margin-top: 24px; }
.faq { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
.faq summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 18px; cursor: pointer; border-radius: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary h3 { margin: 0; font-size: 1rem; }
.faq-chev { color: var(--muted); transition: transform .15s ease; }
.faq[open] .faq-chev { transform: rotate(180deg); }
.faq p { padding: 0 18px 16px; margin: 0; color: var(--ink-2); }

.cta-band { background: linear-gradient(135deg, #0b3b4a, #0e7490); color: #f0fdff; border: 0; }
.cta-band h2 { color: #fff; }
.cta-band p { color: #d5f5fb; }
.cta-band .fine { color: #c4eef7; }
.cta-band .btn-primary { background: #fff; color: #0b3b4a; box-shadow: none; }
.cta-band .btn-primary:hover { background: #e6fbff; }
.cta-band :focus-visible { box-shadow: 0 0 0 3px #0b3b4a, 0 0 0 5px #fff; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-inner > div:first-child { max-width: 620px; }
.cta-actions .fine { margin: 10px 0 0; }

.share { padding: 28px 0; border-bottom: 1px solid var(--line); }
.share-inner { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.share-title { display: inline-flex; align-items: center; gap: 8px; font-size: 1rem; margin: 0; color: var(--ink-2); }
.share-list { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; }

/* ---------- inner pages ---------- */
.page-hero { padding: 56px 0 24px; }
.page-hero-sm { padding-bottom: 8px; }
.crumbs { display: flex; gap: 8px; font-size: .875rem; color: var(--muted); margin-bottom: 18px; flex-wrap: wrap; }
.crumbs a { color: var(--muted); }
.stack { display: grid; gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.card h2 { font-size: 1.25rem; }
.code { background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; overflow-x: auto; font-family: var(--mono); font-size: .875rem; color: var(--ink); }
.tiers { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 8px 0 12px; }
.tier { border: 1px solid var(--line); border-radius: 12px; padding: 18px; }
.tier-pro { border-style: dashed; border-color: var(--line-strong); }
.tier .check-list { margin: 0; }
@media (max-width: 600px) { .tiers { grid-template-columns: 1fr; } }
.notice { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border: 1px solid var(--warn-line); background: var(--warn-bg); color: var(--ink); border-radius: 12px; margin-top: 20px; }
.notice[hidden] { display: none; }
.notice .icon { color: var(--warn); margin-top: 2px; }
.notice p { margin: 4px 0 0; color: var(--ink-2); }
.prose { font-size: 1rem; }
.prose section { padding: 18px 0; border-top: 1px solid var(--line); }
.prose h2 { font-size: 1.2rem; }
.prose p, .prose li { color: var(--ink-2); }
.prose ul { padding-left: 1.25em; margin: 0 0 1em; }
.big-code { font-size: 4.5rem; font-weight: 800; color: var(--accent-text); margin: 0; letter-spacing: -0.04em; }

/* ---------- root / offline ---------- */
.root-main { padding: 72px 16px; }
.root-h { display: inline-flex; align-items: center; gap: 10px; font-size: 1.25rem; margin-top: 24px; }
.root-langs { list-style: none; padding: 0; margin: 16px auto 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px; max-width: 760px; }
.root-langs a { display: block; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); color: var(--ink); text-decoration: none; font-weight: 600; }
.root-langs a:hover { border-color: var(--accent); }
.notice-inline { display: inline-flex; gap: 6px; align-items: center; }
.offline-row { padding: 14px 0; border-top: 1px solid var(--line); }
.offline-row h2 { font-size: 1.1rem; margin-bottom: 4px; }

/* ---------- footer ---------- */
.site-footer { padding: 48px 0 28px; background: var(--surface); border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.footer-brand p { color: var(--muted); max-width: 44ch; margin-top: 12px; font-size: .925rem; }
.site-footer h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 12px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.site-footer nav a { color: var(--ink-2); text-decoration: none; font-size: .925rem; }
.site-footer nav a:hover { color: var(--ink); text-decoration: underline; }
.footer-bottom { margin: 32px 0 0; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }

@media print { .site-header, .share, .cta-band, .site-footer { display: none; } }
@media (forced-colors: active) { .pill, .layer, .btn { border: 1px solid CanvasText; } }
@media (max-width: 860px) {
  .pillars { gap: 12px; margin-top: 36px; }
  .pillar { display: grid; grid-template-columns: 112px minmax(0, 1fr); align-items: center; }
  .pillar img { aspect-ratio: 1 / 1; height: 100%; }
  .pillar-body { padding: 14px 16px; }
}
.stack > * { min-width: 0; }
.code { white-space: pre; max-width: 100%; }
:lang(ko) .layer-kind, :lang(ja) .layer-kind, :lang(zh-CN) .layer-kind, :lang(zh-TW) .layer-kind { letter-spacing: 0; text-transform: none; }