/* SoloQuit — legal documents
   No external fonts, no CDN, no third-party requests.
   Palette and type are declared once here; nothing overrides them below. */

:root {
  --paper:  #FBFBFA;
  --paper-2:#F2F2EF;
  --ink:    #15171B;
  --ink-2:  #3A3F47;
  --muted:  #71767F;
  --rule:   #E2E3DF;
  --accent: #1F6B45;
  --alert:  #9E3B22;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
          Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;

  --measure: 36rem;
  --gut: 1.75rem;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------- language visibility ---------- */

html[lang="zh-Hans"] .en { display: none; }
html[lang="en"]     .zh { display: none; }

/* ---------- shared atoms ---------- */

.mono {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}

.wrap {
  max-width: var(--measure);
  margin-inline: auto;
  padding-inline: var(--gut);
}

a { color: var(--ink); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  z-index: 20;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

/* ---------- masthead ---------- */

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.6rem;
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}

.langswitch {
  display: flex;
  border: 1px solid var(--rule);
  border-radius: 2px;
  overflow: hidden;
}

.langswitch button {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.45rem 0.85rem;
  background: transparent;
  border: 0;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
}

.langswitch button + button { border-left: 1px solid var(--rule); }
.langswitch button:hover { color: var(--ink); background: var(--paper-2); }

html[lang="zh-Hans"] .langswitch button[data-lang="zh-Hans"],
html[lang="en"]     .langswitch button[data-lang="en"] {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- landing: hero ---------- */

.hero { padding-block: 5rem 4rem; }

.hero h1 {
  font-size: clamp(2.25rem, 8vw, 3.25rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 1.75rem 0 0;
}

.hero .lede {
  font-size: 1.0625rem;
  color: var(--ink-2);
  max-width: 27rem;
  margin: 2.25rem 0 0;
  line-height: 1.9;
}

/* ---------- landing: fact strip ---------- */

.facts {
  list-style: none;
  margin: 0;
  padding: 2.5rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 3rem;
}

.facts li {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.facts li::before {
  content: "—";
  color: var(--accent);
  margin-right: 0.65rem;
}

/* ---------- landing: document rows ---------- */

.doc {
  display: block;
  padding-block: 2.75rem;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
  transition: padding-left 180ms ease;
}

.doc:hover { padding-left: 0.75rem; }

.doc-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
}

.doc-title strong {
  font-size: 1.4375rem;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.doc-arrow { font-family: var(--mono); color: var(--muted); }

.doc-sum {
  margin: 0.9rem 0 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.85;
  max-width: 30rem;
}

.doc-alt {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-top: 1.1rem;
}

/* ---------- document pages ---------- */

.docpage header { padding-block: 1.6rem 2.75rem; border-bottom: 1px solid var(--rule); }

.docpage .dtitle {
  font-size: clamp(1.875rem, 7vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 2.5rem 0 0;
}

.docpage .updated {
  margin: 1rem 0 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.prose { padding-block: 1rem 4rem; }

.prose section { margin-top: 3rem; }

.prose h2 {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  margin: 0 0 1rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.5rem;
}

.prose h2 .n {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  margin-right: 0.7rem;
  font-weight: 500;
}

.prose p { margin: 0 0 1.1rem; color: var(--ink-2); }

.prose ul { margin: 0 0 1.1rem; padding-left: 1.25rem; color: var(--ink-2); }
.prose li { margin-bottom: 0.5rem; }

.prose code {
  font-family: var(--mono);
  font-size: 0.8125rem;
  background: var(--paper-2);
  padding: 0.1rem 0.35rem;
  border-radius: 2px;
  color: var(--ink);
}

.prose .callout {
  border-left: 2px solid var(--accent);
  padding: 0.25rem 0 0.25rem 1.25rem;
  margin: 1.75rem 0 0;
  color: var(--ink);
}

.prose .callout p { margin: 0 0 0.75rem; color: var(--ink); }
.prose .callout p:last-child { margin-bottom: 0; }

.prose .contact {
  margin-top: 2.5rem;
  padding: 1.75rem 2rem;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.prose .contact .mail {
  display: inline-block;
  margin-top: 0.35rem;
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.prose .qa {
  margin-top: 2.25rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--rule);
}

.prose .qa dt {
  font-weight: 600;
  margin: 0 0 0.65rem;
  color: var(--ink);
}

.prose .qa dd {
  margin: 0;
  color: var(--ink-2);
}

.prose .qa dd p { margin-bottom: 0.75rem; }
.prose .qa dd p:last-child { margin-bottom: 0; }

.prose .navlinks {
  margin-top: 4rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--rule);
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.colophon {
  border-top: 1px solid var(--rule);
  padding-block: 1.75rem 3rem;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* ---------- narrow screens ---------- */

@media (max-width: 30rem) {
  :root { --gut: 1.25rem; }
  body { font-size: 16px; }
  .hero { padding-block: 3.5rem 3rem; }
  .facts { gap: 0.85rem 2rem; }
  .doc { padding-block: 2.25rem; }
  .doc-title strong { font-size: 1.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .doc { transition: none; }
  .doc:hover { padding-left: 0; }
}