/* Ventrin Docs — single-page, search-first documentation.
   Builds on landing/styles.css tokens. Mobile-first layout. */

.vt-doc-body { background: var(--vt-bg-page); color: var(--vt-ink); font-family: var(--vt-font-sans); line-height: 1.6; }

.vt-nav-docs { border-bottom: 1px solid var(--vt-line); background: var(--vt-bg-0); position: sticky; top: 0; z-index: 50; }
.vt-doc-nav-crumb {
  margin-left: 10px; padding: 2px 8px;
  border: 1px solid var(--vt-line);
  border-radius: 4px; font-size: 11px;
  letter-spacing: 0.02em; color: var(--vt-ink-3);
  text-transform: uppercase; background: var(--vt-bg-1);
}

/* ── Search bar ───────────────────────────────────────────────────────── */
.vt-docs-search-bar {
  position: sticky;
  top: 54px;
  z-index: 40;
  background: var(--vt-bg-0);
  border-bottom: 1px solid var(--vt-line);
  padding: 10px var(--vt-pad-x);
}
.vt-docs-search-inner {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid var(--vt-line);
  border-radius: 8px;
  background: var(--vt-bg-page);
}
.vt-docs-search-inner svg { color: var(--vt-ink-4); flex-shrink: 0; }
#vt-docs-search {
  flex: 1;
  border: 0;
  background: transparent;
  outline: none;
  font-family: var(--vt-font-sans);
  font-size: 14px;
  color: var(--vt-ink);
  min-width: 0;
}
.vt-docs-kbd {
  font-family: var(--vt-font-mono);
  font-size: 10.5px;
  font-weight: 500;
  padding: 2px 6px;
  border: 1px solid var(--vt-line);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--vt-bg-1);
  color: var(--vt-ink-3);
}
.vt-docs-results {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--vt-bg-0);
  border: 1px solid var(--vt-line);
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  max-height: 60vh;
  overflow-y: auto;
  z-index: 45;
}
.vt-docs-result-item {
  display: block;
  padding: 10px 14px;
  border-bottom: 1px solid var(--vt-line-soft);
  text-decoration: none;
  color: var(--vt-ink-2);
  font-size: 13.5px;
}
.vt-docs-result-item:last-child { border-bottom: 0; }
.vt-docs-result-item:hover,
.vt-docs-result-item.active { background: var(--vt-bg-1); color: var(--vt-ink); }
.vt-docs-result-title { font-weight: 600; color: var(--vt-ink); font-size: 13.5px; }
.vt-docs-result-section { color: var(--vt-ink-4); font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 2px; }
.vt-docs-result-snippet { color: var(--vt-ink-3); font-size: 12.5px; margin-top: 2px; }
.vt-docs-result-snippet mark { background: var(--vt-amber-tint); color: var(--vt-ink); padding: 0 2px; border-radius: 2px; }
.vt-docs-result-empty { padding: 14px; color: var(--vt-ink-4); font-size: 13px; }

/* ── Layout ───────────────────────────────────────────────────────────── */
.vt-docs-layout {
  max-width: var(--vt-max);
  margin: 0 auto;
  padding: 28px var(--vt-pad-x) 96px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
}

@media (max-width: 960px) {
  .vt-docs-layout { grid-template-columns: 1fr; gap: 12px; padding: 20px var(--vt-pad-x) 60px; }
}

/* ── TOC ──────────────────────────────────────────────────────────────── */
.vt-docs-toc {
  position: sticky;
  top: 116px;
  max-height: calc(100vh - 140px);
  overflow-y: auto;
  font-size: 13.5px;
  padding-right: 12px;
  border-right: 1px solid var(--vt-line-soft);
}
.vt-docs-toc-toggle {
  display: none;
  width: 100%;
  appearance: none;
  border: 1px solid var(--vt-line);
  background: var(--vt-bg-0);
  padding: 10px 14px;
  border-radius: 8px;
  font-family: var(--vt-font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--vt-ink);
  text-align: left;
  cursor: pointer;
}
.vt-docs-toc-toggle::after { content: "▾"; float: right; color: var(--vt-ink-4); font-size: 10px; }

@media (max-width: 960px) {
  .vt-docs-toc {
    position: static;
    top: auto;
    max-height: none;
    padding-right: 0;
    border-right: 0;
    border-bottom: 1px solid var(--vt-line-soft);
    padding-bottom: 8px;
  }
  .vt-docs-toc-toggle { display: block; margin-bottom: 8px; }
  .vt-docs-toc nav { display: none; max-height: 50vh; overflow-y: auto; }
  .vt-docs-toc nav.open { display: block; }
}

.vt-docs-toc-group { margin-bottom: 16px; }
.vt-docs-toc-label {
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--vt-ink-4);
  font-weight: 600;
  margin-bottom: 6px;
  padding-left: 2px;
}
.vt-docs-toc-item {
  display: block;
  padding: 5px 10px;
  color: var(--vt-ink-3);
  text-decoration: none;
  border-radius: 4px;
  transition: color 120ms, background 120ms;
}
.vt-docs-toc-item:hover { color: var(--vt-ink); background: var(--vt-bg-1); }
.vt-docs-toc-item.active {
  color: var(--vt-ink);
  font-weight: 500;
  background: var(--vt-bg-1);
}
.vt-docs-toc-external::after { content: ""; }

/* ── Article ──────────────────────────────────────────────────────────── */
.vt-docs-article {
  min-width: 0;
  max-width: 780px;
}

.vt-docs-hero {
  padding: 16px 0 26px;
  border-bottom: 1px solid var(--vt-line);
  margin-bottom: 18px;
}
.vt-docs-h1 {
  font-family: var(--vt-font-serif);
  font-size: 44px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 10px 0 14px;
  color: var(--vt-ink);
}
.vt-docs-lede {
  font-size: 17px;
  color: var(--vt-ink-2);
  margin: 0 0 14px;
  max-width: 640px;
}
.vt-docs-hint {
  font-size: 13px;
  color: var(--vt-ink-4);
}
.vt-docs-hint kbd {
  font-family: var(--vt-font-mono);
  font-size: 10.5px;
  padding: 2px 6px;
  border: 1px solid var(--vt-line);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--vt-bg-1);
  color: var(--vt-ink-3);
}

.vt-docs-divider {
  font-family: var(--vt-font-serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--vt-ink-4);
  text-transform: uppercase;
  margin: 48px 0 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--vt-line);
  letter-spacing: 0.1em;
}

.vt-docs-section {
  padding-top: 28px;
  margin-top: 28px;
  border-top: 1px solid var(--vt-line-soft);
  scroll-margin-top: 130px;
}
.vt-docs-section:first-of-type { border-top: 0; padding-top: 12px; margin-top: 12px; }
.vt-docs-section h2 {
  font-family: var(--vt-font-serif);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--vt-ink);
}
.vt-docs-section h3 {
  font-size: 16px; font-weight: 600; color: var(--vt-ink);
  margin: 22px 0 8px;
}
.vt-docs-section h4 {
  font-size: 14.5px; font-weight: 600; color: var(--vt-ink);
  margin: 0 0 4px;
}
.vt-docs-section p,
.vt-docs-section li,
.vt-docs-section dd {
  color: var(--vt-ink-2); font-size: 14.5px;
}
.vt-docs-section p { margin: 0 0 12px; }
.vt-docs-section a:not(.vt-btn) { color: var(--vt-blue); text-decoration: underline; text-underline-offset: 2px; }
.vt-docs-section a:not(.vt-btn):hover { color: var(--vt-blue-2); }
.vt-docs-section ul, .vt-docs-section ol { padding-left: 22px; margin: 0 0 14px; }
.vt-docs-section li { margin-bottom: 5px; }
.vt-docs-section strong { color: var(--vt-ink); font-weight: 600; }
.vt-docs-section code {
  font-family: var(--vt-font-mono); font-size: 12.5px;
  background: var(--vt-bg-1); border: 1px solid var(--vt-line-soft);
  padding: 1px 5px; border-radius: 3px; color: var(--vt-ink);
}

.vt-docs-callout {
  border-left: 3px solid var(--vt-blue);
  background: var(--vt-blue-tint);
  padding: 12px 16px;
  margin: 14px 0;
  border-radius: 4px;
  font-size: 14px;
  color: var(--vt-ink-2);
}
.vt-docs-callout strong { color: var(--vt-ink); }

.vt-docs-steps {
  list-style: none; padding: 0; margin: 12px 0 16px;
  counter-reset: stepx;
}
.vt-docs-steps > li {
  counter-increment: stepx;
  position: relative;
  padding: 8px 0 8px 36px;
  border-bottom: 1px dashed var(--vt-line-soft);
  font-size: 14.5px; color: var(--vt-ink-2);
}
.vt-docs-steps > li:last-child { border-bottom: 0; }
.vt-docs-steps > li::before {
  content: counter(stepx);
  position: absolute; left: 0; top: 10px;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--vt-bg-2); color: var(--vt-ink);
  font-family: var(--vt-font-mono); font-size: 11px; font-weight: 600;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--vt-line);
}

.vt-docs-layers {
  list-style: none; padding: 0;
  counter-reset: layer;
  margin: 12px 0 14px;
}
.vt-docs-layers > li {
  counter-increment: layer;
  padding: 14px 16px 14px 52px;
  border: 1px solid var(--vt-line-soft);
  background: var(--vt-bg-0);
  border-radius: 6px;
  margin-bottom: 10px;
  position: relative;
}
.vt-docs-layers > li::before {
  content: counter(layer);
  position: absolute; left: 14px; top: 14px;
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--vt-ink); color: #fff; border-radius: 50%;
  font-family: var(--vt-font-mono); font-size: 12px; font-weight: 600;
}
.vt-docs-layers h4 { margin: 0 0 4px; }
.vt-docs-layers p { margin: 0; font-size: 13.5px; color: var(--vt-ink-3); }

.vt-docs-dl dt {
  font-size: 14.5px; font-weight: 600; color: var(--vt-ink);
  margin-top: 14px;
}
.vt-docs-dl dt:first-child { margin-top: 0; }
.vt-docs-dl dd { margin: 4px 0 0; padding: 0; color: var(--vt-ink-2); font-size: 14px; }

/* Reuse the code-block styling from the API guide */
.vt-code {
  background: var(--vt-dark);
  border: 1px solid var(--vt-dark-line);
  border-radius: 6px;
  margin: 0 0 16px;
  overflow: hidden;
}
.vt-code-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 12px;
  background: var(--vt-dark-soft);
  border-bottom: 1px solid var(--vt-dark-line);
}
.vt-code-lang { font-family: var(--vt-font-mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--vt-dark-ink-2); }
.vt-code-copy {
  font-family: var(--vt-font-sans); font-size: 11.5px; font-weight: 500;
  color: var(--vt-dark-ink-2); background: transparent;
  border: 1px solid var(--vt-dark-line); padding: 3px 10px; border-radius: 4px;
  cursor: pointer; transition: color 120ms, border-color 120ms, background 120ms;
}
.vt-code-copy:hover { color: var(--vt-dark-ink); border-color: var(--vt-dark-ink-2); }
.vt-code-copy.is-copied { color: #9fd8a7; border-color: #3a6b44; background: #1d2e23; }
.vt-code pre { margin: 0; padding: 14px 16px; overflow-x: auto; font-family: var(--vt-font-mono); font-size: 12.5px; line-height: 1.6; color: var(--vt-dark-ink); }
.vt-code pre code { background: transparent; border: 0; padding: 0; color: inherit; font-size: inherit; }

.vt-docs-end {
  margin-top: 56px;
  padding: 20px;
  background: var(--vt-bg-0);
  border: 1px solid var(--vt-line);
  border-radius: 6px;
  display: flex; align-items: center; gap: 14px;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .vt-docs-h1 { font-size: 32px; }
  .vt-docs-section h2 { font-size: 22px; }
  .vt-docs-section { padding-top: 20px; margin-top: 20px; }
  .vt-code pre { font-size: 11.5px; padding: 12px; }
  .vt-docs-end { flex-direction: column; align-items: stretch; }
}