*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
}
a { color: var(--accent-cool); }
a:hover { text-decoration: underline; }

.wrap {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.hero {
  padding: 2.75rem 0 2rem;
  background:
    radial-gradient(ellipse 80% 60% at 10% 0%, var(--wash-cool), transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 10%, var(--wash-warm), transparent 50%);
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.85rem;
}
.eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-cool);
  box-shadow: 0 0 0 3px var(--accent-cool-soft);
}
.hero h1 {
  font-family: var(--display);
  font-size: clamp(1.55rem, 3.5vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin: 0 0 0.85rem;
}
.t-muted { color: var(--muted); font-weight: 500; }
.hero-sub {
  max-width: 52rem;
  color: var(--ink-soft);
  margin: 0 0 1.25rem;
  font-size: 1.02rem;
}

.search-bar {
  display: flex;
  gap: 0.5rem;
  max-width: 36rem;
  position: relative;
}
.search-bar input {
  flex: 1;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  padding: 0.65rem 1.1rem;
  box-shadow: var(--shadow);
  outline: none;
}
.search-bar input:focus {
  border-color: var(--accent-cool);
  box-shadow: 0 0 0 3px var(--accent-cool-soft);
}
.search-hint {
  font-size: 0.78rem;
  color: var(--faint);
  margin-top: 0.45rem;
}

.search-results {
  display: none;
  margin-top: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  max-height: 22rem;
  overflow: auto;
}
.search-results.open { display: block; }
.search-results a {
  display: block;
  padding: 0.7rem 1rem;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}
.search-results a:last-child { border-bottom: none; }
.search-results a:hover { background: var(--hover-fill); }
.search-results .sr-title {
  font-weight: 600;
  font-size: 0.9rem;
}
.search-results .sr-meta {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 0.15rem;
}
.search-results .sr-snip {
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-top: 0.25rem;
}
.search-results mark {
  background: var(--accent-warm-soft);
  color: inherit;
  padding: 0 0.1em;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 0.75rem;
}

main.hub { padding: 2.5rem 0 3.5rem; }

.task-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.task-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.25rem 1.3rem;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
  position: relative;
  overflow: hidden;
}
.task-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent-cool);
}
.task-card.warm::before { background: var(--accent-warm); }
.task-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-1px);
  text-decoration: none;
}
.task-card .task-id {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-cool);
}
.task-card.warm .task-id { color: var(--accent-warm); }
.task-card h2 {
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}
.task-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
  flex: 1;
}
.task-card .task-src {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--faint);
  margin-top: 0.35rem;
}

.doc-list {
  display: grid;
  gap: 0.65rem;
}
.doc-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.1rem;
  text-decoration: none;
  color: inherit;
}
.doc-row:hover { background: var(--hover-fill); text-decoration: none; }
.doc-row .doc-title { font-weight: 600; flex: 1 1 12rem; }
.doc-row .doc-file {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--faint);
}

.callout {
  margin: 1.5rem 0 0;
  padding: 1rem 1.15rem;
  background: var(--bg-elevated);
  border-left: 3px solid var(--accent-cool);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.88rem;
}
.site-footer a { color: var(--ink-soft); }

/* Document viewer */
.doc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.5rem 0 3rem;
}
@media (min-width: 960px) {
  .doc-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    align-items: start;
  }
}

.doc-head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
  margin-bottom: 1.25rem;
}

.toc-toggle {
  display: none;
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  padding: 0.35rem 0.85rem;
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.toc-toggle:hover {
  background: var(--hover-fill);
}
.toc-toggle:focus-visible {
  outline: 2px solid var(--accent-cool);
  outline-offset: 2px;
}
.toc-toggle[aria-expanded="true"] {
  color: var(--accent-cool);
  border-color: var(--accent-cool-mid);
  background: var(--accent-cool-soft);
}

.toc-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(14, 17, 20, 0.45);
  border: none;
  padding: 0;
  cursor: pointer;
}
.toc-backdrop.is-open {
  display: block;
}

.doc-toc {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  font-size: 0.8rem;
}
.doc-toc .toc-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 0.5rem;
}
.doc-toc a {
  display: block;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.2rem 0;
  border-left: 2px solid transparent;
  padding-left: 0.55rem;
  margin-left: -0.1rem;
}
.doc-toc a:hover { color: var(--ink); }
.doc-toc a.depth-3 { font-size: 0.75rem; opacity: 0.9; padding-left: 1.1rem; }
.doc-toc a.active {
  color: var(--accent-cool);
  border-left-color: var(--accent-cool);
}

/* Sticky side TOC only when two-column layout is active */
@media (min-width: 960px) {
  .doc-toc {
    position: sticky;
    top: 68px;
    max-height: calc(100vh - 80px);
    overflow: auto;
  }
  .toc-toggle,
  .toc-backdrop {
    display: none !important;
  }
}

/* Mid/narrow: drawer TOC — closed by default, no sticky overlay */
@media (max-width: 959px) {
  .doc-layout {
    display: block;
  }
  .toc-toggle {
    display: inline-flex;
    align-items: center;
  }
  .toc-toggle[hidden] {
    display: none !important;
  }
  .doc-toc {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 60;
    width: min(300px, 88vw);
    max-height: none;
    overflow: auto;
    border-radius: 0;
    border: none;
    border-left: 1px solid var(--line);
    box-shadow: var(--shadow-card);
    padding: 1.25rem 1.1rem 2rem;
    transform: translateX(100%);
    visibility: hidden;
    pointer-events: none;
    /* Delay hiding visibility until slide-out finishes; show immediately on open */
    transition: transform 0.25s var(--ease), visibility 0s linear 0.25s;
  }
  .doc-toc[hidden] {
    display: none !important;
  }
  .doc-toc.is-open {
    display: block;
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.25s var(--ease), visibility 0s;
  }
  body.toc-drawer-open {
    overflow: hidden;
  }
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
  margin: 0;
  flex: 1 1 auto;
  min-width: 0;
}
.doc-meta .chip {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--ink-soft);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  padding: 0.3rem 0.75rem;
}
.doc-meta a.raw {
  font-size: 0.8rem;
  color: var(--muted);
}

.prose {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem 1.6rem 2rem;
  box-shadow: var(--shadow);
  overflow-x: auto;
}
.prose > :first-child { margin-top: 0; }
.prose h1 {
  font-family: var(--display);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 1rem;
  line-height: 1.25;
}
.prose h2 {
  font-family: var(--display);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
}
.prose h2:first-of-type { border-top: none; padding-top: 0; }
.prose h3 {
  font-size: 1.02rem;
  font-weight: 600;
  margin: 1.4rem 0 0.5rem;
  color: var(--ink-soft);
}
.prose p, .prose ul, .prose ol, .prose table { margin: 0 0 1rem; }
.prose li { margin: 0.25rem 0; }
.prose code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}
.prose pre {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  overflow-x: auto;
  margin: 0 0 1rem;
}
.prose pre code {
  background: none;
  padding: 0;
  font-size: 0.82rem;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.prose th, .prose td {
  border: 1px solid var(--line-strong);
  padding: 0.45rem 0.65rem;
  text-align: left;
  vertical-align: top;
}
.prose th {
  background: var(--bg-elevated);
  font-weight: 600;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.prose blockquote {
  margin: 0 0 1rem;
  padding: 0.65rem 1rem;
  border-left: 3px solid var(--accent-warm);
  background: var(--wash-warm);
  color: var(--ink-soft);
}
.prose hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 1.75rem 0;
}

.doc-error {
  padding: 2rem;
  color: var(--accent-warm);
  background: var(--accent-warm-soft);
  border-radius: var(--radius);
}

.csv-wrap { overflow-x: auto; }
.csv-wrap table { font-family: var(--mono); font-size: 0.78rem; }

@media (max-width: 720px) {
  .wrap { width: min(100% - 1.25rem, var(--max)); }
  .prose { padding: 1.1rem 1rem 1.5rem; }
}