/* zeroleft content pages — shares the app / marketing visual identity.
   Keep the tokens in sync with apps/web/src/styles.css and public/index.html. */

:root {
  --paper: #f3f1ea;
  --card: #fbfaf6;
  --ink: #1c1b19;
  --slate: #1f5f8b;
  --amber: #b8801c;
  --good: #2f7d4f;
  --bad: #b03a2e;
  --muted: #6f6b62;
  --line: #e2dfd5;
  --btn-ink: #fbfaf6;
  --sel: #d9e5ee;
  --serif: "Fraunces", "Iowan Old Style", Palatino, Georgia, serif;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #15161a; --card: #1d1e23; --ink: #eceae6; --slate: #74b3e6; --amber: #d9a441;
    --good: #63bd88; --bad: #e07a6d; --muted: #9a978d; --line: #2f3138; --btn-ink: #15161a; --sel: #24384a;
  }
}
:root[data-theme="dark"] {
  --paper: #15161a; --card: #1d1e23; --ink: #eceae6; --slate: #74b3e6; --amber: #d9a441;
  --good: #63bd88; --bad: #e07a6d; --muted: #9a978d; --line: #2f3138; --btn-ink: #15161a; --sel: #24384a;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  font-optical-sizing: auto;
}
::selection { background: var(--sel); }
img { max-width: 100%; height: auto; }
a { color: var(--slate); }

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; line-height: 1.14; letter-spacing: -0.012em; text-wrap: balance; margin: 0; }

/* ---------- header / footer ---------- */
.site-head, .site-foot .foot-inner { max-width: 760px; margin: 0 auto; padding: 0 24px; }
.site-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
  padding-top: 24px; padding-bottom: 4px;
}
.mark { font-family: var(--serif); font-weight: 600; font-size: 1.3rem; letter-spacing: -0.01em; color: var(--ink); text-decoration: none; font-optical-sizing: auto; }
.mark span { color: var(--slate); }
.head-cta {
  font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.03em;
  color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--line); padding-bottom: 2px;
}
.head-cta:hover { color: var(--ink); border-color: var(--slate); }

.site-foot { border-top: 1px solid var(--line); margin-top: 4rem; padding: 2rem 0 3rem; }
.foot-nav { display: flex; gap: 1.3rem; flex-wrap: wrap; }
.foot-nav a { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); text-decoration: none; }
.foot-nav a:hover { color: var(--ink); }
.foot-disc { font-size: 0.82rem; color: var(--muted); max-width: 52ch; margin: 1rem 0 0.6rem; }
.foot-mono { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.03em; color: var(--muted); margin: 0; }

/* ---------- guide article ---------- */
main { display: block; }
.guide, .guide-index { max-width: 720px; margin: 0 auto; padding: 2rem 24px 1rem; }
.crumbs { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.02em; color: var(--muted); margin-bottom: 1.6rem; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--ink); }
.crumbs span { margin: 0 0.4rem; }
.draft-flag { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--amber); margin: 0 0 1rem; }

.guide h1 { font-size: clamp(1.9rem, 4.4vw, 2.7rem); margin-bottom: 0.7rem; }
.guide-meta { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.02em; color: var(--muted); margin: 0 0 2rem; }

.prose { font-size: 1.03rem; }
.prose > * + * { margin-top: 1.05rem; }
.prose h2 { font-size: clamp(1.35rem, 3vw, 1.7rem); margin-top: 2.6rem; }
.prose h3 { font-family: var(--sans); font-weight: 600; font-size: 1.05rem; margin-top: 1.8rem; }
.prose p, .prose li { color: color-mix(in srgb, var(--ink) 92%, var(--paper)); }
.prose a { text-underline-offset: 2px; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li { margin: 0.35rem 0; }
.prose li::marker { color: var(--muted); }
.prose blockquote {
  margin: 1.4rem 0; padding: 0.6rem 0 0.6rem 1.1rem;
  border-left: 3px solid var(--slate); color: var(--muted); font-style: italic;
}
.prose code {
  font-family: var(--mono); font-size: 0.86em;
  background: color-mix(in srgb, var(--ink) 7%, transparent); padding: 1px 5px; border-radius: 3px;
}
.prose pre {
  background: var(--card); border: 1px solid var(--line); border-radius: 6px;
  padding: 0.9rem 1rem; overflow-x: auto; font-size: 0.86rem;
}
.prose pre code { background: none; padding: 0; }
.prose img { border-radius: 6px; border: 1px solid var(--line); }
.prose table { width: 100%; border-collapse: collapse; font-size: 0.92rem; display: block; overflow-x: auto; }
.prose th { text-align: left; font-family: var(--mono); font-weight: 400; font-size: 0.66rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); padding: 0 0.9rem 0.5rem 0; border-bottom: 1px solid var(--line); }
.prose td { padding: 0.55rem 0.9rem 0.55rem 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.4rem 0; }

/* ---------- faq / cta / related ---------- */
.faq { margin-top: 3rem; border-top: 1px solid var(--line); padding-top: 1.6rem; }
.faq h2 { font-size: 1.4rem; margin-bottom: 0.6rem; }
.faq-item { padding: 1rem 0; border-bottom: 1px solid var(--line); }
.faq-item h3 { font-family: var(--sans); font-weight: 600; font-size: 1rem; margin-bottom: 0.3rem; }
.faq-item p { color: var(--muted); margin: 0; }

.guide-cta {
  margin-top: 3rem; padding: 1.5rem; border: 1px solid var(--line); border-radius: 6px; background: var(--card);
}
.guide-cta p { margin: 0 0 1rem; color: color-mix(in srgb, var(--ink) 88%, var(--paper)); }
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  background: var(--slate); color: var(--btn-ink); font-weight: 600; font-size: 0.95rem;
  text-decoration: none; padding: 0.65rem 1.25rem; border-radius: 3px;
}
.btn:hover { box-shadow: 0 6px 18px -8px color-mix(in srgb, var(--slate) 55%, transparent); }

.related { margin-top: 2.4rem; }
.related h2 { font-size: 1.1rem; font-family: var(--sans); font-weight: 600; margin-bottom: 0.5rem; }
.related ul { list-style: none; padding: 0; margin: 0; }
.related li { padding: 0.5rem 0; border-top: 1px solid var(--line); }
.related a { text-decoration: none; }
.related a:hover { text-decoration: underline; }

/* ---------- guide index ---------- */
.guide-index h1 { font-size: clamp(1.9rem, 4.4vw, 2.6rem); margin-bottom: 0.6rem; }
.guide-index .lede { font-size: 1.08rem; color: var(--muted); margin-bottom: 2rem; }
.gi-list { list-style: none; padding: 0; margin: 0; }
.gi-list li { border-top: 1px solid var(--line); }
.gi-list li:last-child { border-bottom: 1px solid var(--line); }
.gi-list a { display: block; padding: 1.1rem 0; text-decoration: none; color: inherit; }
.gi-list a:hover .gi-title { color: var(--slate); }
.gi-title { display: block; font-family: var(--serif); font-size: 1.15rem; font-weight: 500; }
.gi-title em { font-family: var(--mono); font-size: 0.7rem; color: var(--amber); font-style: normal; }
.gi-desc { display: block; color: var(--muted); font-size: 0.92rem; margin-top: 0.25rem; }
.muted { color: var(--muted); }

a:focus-visible, .btn:focus-visible { outline: 2px solid var(--slate); outline-offset: 3px; border-radius: 2px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }