/* x12i-docify — product site + docs chrome */

:root {
  --ink: oklch(18% 0.01 260);
  --ink-muted: oklch(40% 0.012 260);
  --ink-faint: oklch(50% 0.01 260);
  --surface: oklch(98% 0.003 260);
  --surface-dim: oklch(96% 0.006 260);
  --border: oklch(88% 0.006 260);
  --border-strong: oklch(80% 0.008 260);
  --accent: oklch(55% 0.15 260);
  --accent-alt: oklch(60% 0.15 40);
  --accent-soft: oklch(94% 0.03 260);
  --accent-alt-soft: oklch(94% 0.03 40);
  --radius: 6px;
  --radius-lg: 8px;
  --font-sans: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --shadow: none;
  --pad-x: clamp(24px, 5vw, 64px);
}

*{ box-sizing: border-box; }

html, body{
  margin: 0;
  padding: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body{ min-height: 100vh; }

a{ color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.page-shell{
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main{ flex: 1; }

/* ---------- header ---------- */

.site-header{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px var(--pad-x);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.brand-mark{
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 2px;
  flex-shrink: 0;
}

.brand-badge{
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--surface-dim);
  color: var(--ink-muted);
}

.site-nav{
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.site-nav a{
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-muted);
}

.site-nav a:hover{ color: var(--ink); }

.nav-external{
  border-left: 1px solid var(--border);
  padding-left: 24px;
  font-size: 14px !important;
  color: var(--ink-faint) !important;
}

.nav-toggle{
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

/* ---------- hero ---------- */

.hero{
  padding: 96px var(--pad-x) 64px;
  max-width: calc(880px + 2 * var(--pad-x));
}

.page-product-home .hero{
  padding-top: 120px;
  padding-bottom: 96px;
  max-width: calc(920px + 2 * var(--pad-x));
}

.hero-kicker{
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero h1{
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  font-weight: 600;
}

.page-docs-home .hero h1{ font-size: clamp(32px, 4vw, 44px); line-height: 1.15; }

.hero-lead{
  font-size: 19px;
  line-height: 1.6;
  color: var(--ink-muted);
  max-width: 640px;
  margin: 0 0 40px;
}

.page-docs-home .hero-lead{ font-size: 17px; }

.cta-row{
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.btn{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 14px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-sm{ padding: 10px 18px; font-size: 14px; }

.btn-primary{
  background: var(--accent);
  color: #fff;
}

.btn-alt{
  background: var(--accent-alt);
  color: #fff;
}

.btn-secondary{
  background: transparent;
  color: var(--ink);
  border-color: var(--border-strong);
}

.btn-link{
  background: transparent;
  color: var(--ink);
  padding-left: 4px;
  padding-right: 4px;
  border: 0;
}

.btn-link::after{ content: " →"; }

/* ---------- sections ---------- */

.section{
  padding: 0 var(--pad-x) 80px;
  max-width: calc(1200px + 2 * var(--pad-x));
}

.section-kicker{
  font-size: 14px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  margin: 0 0 40px;
  font-weight: 600;
}

.section-head{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 12px;
}

.section-head h2,
.section-title{
  font-size: 26px;
  margin: 0;
  font-weight: 600;
}

.section-link{
  font-size: 14px;
  font-weight: 600;
}

.grid-cells{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.grid-cell{
  background: var(--surface);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cell-title{ font-weight: 600; font-size: 17px; }
.cell-body{
  font-size: 14.5px;
  color: var(--ink-muted);
  line-height: 1.5;
}

.trust-strip{
  background: var(--surface-dim);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 24px var(--pad-x);
  margin-bottom: 48px;
}

.trust-inner{
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
}

.book-card-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.book-card{
  border: 1px solid var(--border);
  padding: 24px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 14px;
  color: var(--ink);
}

.book-card:hover{ border-color: var(--border-strong); }

.book-num{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}

.book-title{ font-weight: 600; font-size: 16.5px; }

.tag-row{ display: flex; gap: 6px; flex-wrap: wrap; }

.tag{
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  width: fit-content;
}

.tag-alt{
  background: var(--accent-alt-soft);
  color: var(--accent-alt);
}

/* ---------- tracks / audience ---------- */

.tracks, .audience-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  max-width: calc(1100px + 2 * var(--pad-x));
}

.audience-card, .track{
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.audience-card{ border-top: 3px solid var(--accent); }
.audience-alt{ border-top-color: var(--accent-alt); }

.audience-card h2, .track h2{
  font-size: 22px;
  margin: 0;
  font-weight: 600;
}

.audience-card p{
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-muted);
  margin: 0;
}

.path-line{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
  line-height: 1.8;
}

.step-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.step-list li{
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.step-num{
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
}

.track-alt .step-num{ background: var(--accent-alt); }

.step-text{
  font-size: 15px;
  line-height: 1.6;
  padding-top: 2px;
}

.step-text a{
  color: var(--accent);
  font-weight: 600;
}

.track-alt .step-text a{ color: var(--accent-alt); }

.track-note{
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.6;
  margin: 0;
}

.note{
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 26px;
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.6;
  background: var(--surface-dim);
}

.note-title{ font-weight: 600; font-size: 15px; color: var(--ink); margin-bottom: 6px; }

/* ---------- catalog / use cases hydrate ---------- */

.list-table-wrap{
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.list-table-head,
.list-table-row{
  display: grid;
  grid-template-columns: 56px 1fr 120px 140px;
  padding: 14px 24px;
  align-items: center;
  gap: 8px;
}

.list-table-head{
  background: var(--surface-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
}

.list-table-row{
  border-top: 1px solid oklch(90% 0.006 260);
  color: inherit;
  text-decoration: none;
}

.list-table-row:hover{ background: var(--surface-dim); }

.list-num{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-faint);
}

.list-title{ font-size: 15px; font-weight: 500; }

.mark-yes{ color: var(--accent); font-weight: 600; }
.mark-alt{ color: var(--accent-alt); font-weight: 600; }
.mark-no{ color: oklch(70% 0.01 260); font-weight: 600; }

.coming-soon-block{
  margin-top: 40px;
  border: 1px dashed oklch(82% 0.006 260);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.coming-soon-block h3{
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 16px;
  padding: 0;
}

.coming-soon-item{
  background: var(--surface);
  padding: 14px 20px;
  font-size: 14.5px;
  color: var(--ink-muted);
  border-top: 1px solid oklch(90% 0.006 260);
}

.coming-soon-item:first-child{ border-top: 0; }

.uc-group{ margin-bottom: 48px; }

.uc-group-label{ margin-bottom: 18px; }

.uc-grid{
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
}

.uc-item{
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 20px;
  border-top: 1px solid oklch(92% 0.006 260);
  border-left: 1px solid oklch(92% 0.006 260);
}

.uc-id{
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 6px;
  border-radius: 4px;
  flex-shrink: 0;
}

.uc-id.alt{
  color: var(--accent-alt);
  background: var(--accent-alt-soft);
}

.uc-title{ font-size: 14px; }

/* ---------- book landing ---------- */

.crumb{
  padding: 20px var(--pad-x) 0;
  font-size: 13px;
  color: var(--ink-faint);
}

.book-hero{ padding-top: 48px; padding-bottom: 40px; }

.meta-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  padding-bottom: 40px;
}

.meta-card{
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.meta-label{
  font-size: 12px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin-bottom: 8px;
}

.meta-body{ font-size: 14.5px; color: var(--ink); }

.related-row{ display: flex; gap: 12px; flex-wrap: wrap; }

.related-chip{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 14px;
}

/* ---------- footer ---------- */

.site-footer{
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding: 40px var(--pad-x);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-id{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-faint);
}

.footer-nav{
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-nav a{
  font-size: 14px;
  color: var(--ink-muted);
}

.prose{
  max-width: 720px;
  font-size: 15px;
  color: var(--ink-muted);
  line-height: 1.65;
}

.prose code{
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--surface-dim);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ---------- reader shell (kept for /read) ---------- */

.reader-shell{ display: flex; flex: 1; min-height: 0; }

.reader-sidebar{
  width: 280px;
  flex-shrink: 0;
  background: var(--ink);
  color: oklch(92% 0.01 260);
  padding: 22px 0;
  overflow-y: auto;
}

.reader-sidebar .side-block{
  padding: 0 20px 18px;
  border-bottom: 1px solid oklch(30% 0.01 260);
  margin-bottom: 12px;
}

.reader-sidebar .side-title{
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 4px;
}

.reader-sidebar .side-sub{
  font-size: 12px;
  color: var(--accent);
  font-family: var(--font-mono);
}

.reader-sidebar .export-btn{
  display: block;
  margin-top: 14px;
  background: var(--accent);
  color: #fff;
  text-align: center;
  padding: 9px 10px;
  border-radius: var(--radius);
  font-size: 12.5px;
  font-weight: 600;
}

.chapter-nav{ list-style: none; margin: 0; padding: 6px 8px; }
.chapter-nav a{
  display: block;
  padding: 8px 12px;
  font-size: 13px;
  border-radius: 5px;
  color: oklch(85% 0.01 260);
  line-height: 1.35;
}
.chapter-nav a:hover{ background: oklch(28% 0.01 260); color: #fff; }
.chapter-nav a.active{ background: var(--accent); color: #fff; }
.chapter-nav .num{
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--accent);
  margin-right: 6px;
}
.chapter-nav a.active .num{ color: #fff; }

.reader-main{ flex: 1; min-width: 0; display: flex; flex-direction: column; }

.reader-topline{
  padding: 10px 24px;
  border-bottom: 1px solid var(--border);
  font-size: 12.5px;
  color: var(--ink-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.reader-topline a{ color: var(--accent); font-weight: 600; }

.reader-frame-wrap{ flex: 1; min-height: 0; }
.reader-frame-wrap iframe{ width: 100%; height: 100%; border: 0; display: block; }

.sidebar-toggle{
  display: none;
  background: var(--ink);
  color: #fff;
  border: 0;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  text-align: left;
  width: 100%;
}

.dl-row{ display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

@media (max-width: 820px){
  .nav-toggle{ display: inline-flex; }
  .site-nav{
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding-top: 8px;
  }
  .site-nav.open{ display: flex; }
  .nav-external{ border-left: 0; padding-left: 0; }
  .list-table-head, .list-table-row{
    grid-template-columns: 48px 1fr;
  }
  .list-table-head span:nth-child(3),
  .list-table-head span:nth-child(4),
  .list-table-row span:nth-child(3),
  .list-table-row span:nth-child(4){ display: none; }
  .sidebar-toggle{ display: block; }
  .reader-shell{ flex-direction: column; }
  .reader-sidebar{
    width: 100%;
    max-height: 0;
    padding: 0;
    overflow: hidden;
  }
  .reader-sidebar.open{ max-height: 60vh; padding: 18px 0; }
  .reader-frame-wrap{ height: 70vh; }
  .hero{ padding-top: 64px; padding-bottom: 48px; }
}