/* Navigation shares a precise rhythm while inheriting each theme's type and shape. */
.side .nav-group > details > summary {
  display: block;
  list-style: none;
  padding-left: 1.25rem;
  padding-right: 2rem;
  font-weight: 600;
}
.side .nav-group > details > summary::-webkit-details-marker { display: none; }
.side .nav-group > details > summary::before {
  content: "";
  position: absolute;
  left: .35rem;
  top: calc(var(--nav-item-pad-y) + .35em);
  width: .35rem;
  height: .35rem;
  border-right: 1.5px solid var(--color-muted);
  border-bottom: 1.5px solid var(--color-muted);
  transform: rotate(-45deg);
}
.side .nav-group > details[open] > summary::before { transform: rotate(45deg); }
.side .nav-group > details > summary:hover { color: var(--color-link); }
.side .nav-count {
  font-family: inherit;
  font-variant-numeric: tabular-nums;
  font-size: .65rem;
}
.side .nav-group > details > ul {
  margin-left: .5rem;
  padding-left: .65rem;
  border-left-color: var(--color-border-soft);
}
.side .nav-tree > .nav-group { margin-block: .45rem; }
.side .nav-entry a { font-size: .8rem; }
.side .nav-filter-status:empty { display: none; }
.side .nav-search { margin-bottom: 1rem; }
.side .nav-search input { min-height: 2.4rem; font-size: .75rem; }
:root:is(:not([data-theme]), [data-theme="shoal"], [data-theme="vice"]) .side a[aria-current="page"] {
  background: color-mix(in srgb, var(--color-accent) 10%, var(--color-page));
  color: var(--color-ink);
  font-weight: 600;
  box-shadow: inset 2px 0 var(--color-accent);
}
.page-toc a { text-decoration: none; color: var(--color-nav-text); }
.page-toc a:hover { color: var(--color-link); text-decoration: underline; text-underline-offset: .2em; }
.page-toc a[aria-current] { color: var(--color-link); }
@media (max-width: 72rem) {
  .side .nav-tree { padding-bottom: .5rem; }
  .side .nav-search { margin-top: .5rem; }
}

/* Documentation pages: a tighter header and a comfortable laptop reading column. */
:root:not([data-layout="splash"]) .layout:not(.api-reference) .page-head {
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
}
:root:not([data-layout="splash"]) .layout:not(.api-reference) .page-head > :last-child {
  margin-bottom: 0;
}
:root:not([data-layout="splash"]):not([data-layout="wide"]) .layout:not(.api-reference) .content article {
  max-width: 46rem;
}
/* Keep the article and its header on the same measure, with a quiet outline control. */
@media (min-width: 72.0625rem) {
  .layout:not(.api-reference):where(:not(.layout-splash):not(.layout-wide):not(.layout-landing)) {
    grid-template-columns: 14rem minmax(0, 1fr) 14rem;
    gap: 2rem;
    padding-inline: clamp(2rem, 3vw, 3rem);
  }
  :root:not([data-layout="splash"]):not([data-layout="wide"]) .layout:not(.api-reference) .content article { max-width: none; }
  .layout:not(.api-reference):where(:not(.layout-splash):not(.layout-wide):not(.layout-landing)) .content :is(p, .summary, .doc-steps, .doc-timeline) { max-width: none; }
  :root:not([data-theme="reef"]) .layout:not(.api-reference).has-rail .content { padding-right: 0; }
  :root[data-theme="reef"] .layout:not(.api-reference) .content {
    padding-inline: clamp(1.5rem, 4vw, 3.5rem);
  }
  .layout:not(.api-reference) .content { position: relative; }
  .layout:not(.api-reference) .page-head h1 {
    font-size: clamp(2rem, 2.7vw, 2.75rem);
    line-height: 1.18;
  }
  .layout:not(.api-reference).toc-hidden {
    grid-template-areas: "side main";
    grid-template-columns: 14rem minmax(0, 1fr);
  }
  :root:not([data-layout="splash"]) .layout:not(.api-reference).toc-hidden .content article { max-width: none; }
  .layout:not(.api-reference).toc-hidden .content :is(p, .summary, .doc-steps, .doc-timeline) {
    max-width: none;
  }
  .layout.toc-hidden > .page-rail { display: none; }
  .toc-visibility-toggle {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    padding: .15rem .25rem;
    border: 0;
    border-radius: var(--radius-small);
    background: transparent;
    color: var(--color-muted);
    font-size: .7rem;
    cursor: pointer;
  }
  .page-toc > .toc-visibility-toggle { float: right; margin-left: .5rem; }
  .toc-visibility-toggle:hover { color: var(--color-ink); background: var(--color-field-surface); }
  .toc-hidden .toc-visibility-toggle { position: absolute; top: 0; right: 0; }
  :root[data-theme="reef"] .toc-hidden .toc-visibility-toggle {
    top: 2.5rem;
    right: clamp(1.5rem, 4vw, 3.5rem);
  }
  .toc-hidden .doc-breadcrumbs { padding-right: 7rem; }
}
@media (max-width: 72rem) {
  .toc-visibility-toggle { display: none; }
}

/* Short changelog entries use a compact header. */
.content[data-document-type="changelog-entry"] .page-head {
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
}
.content[data-document-type="changelog-entry"] .page-head h1 {
  font-size: clamp(1.45rem, 2vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin: 0.5rem 0 0.65rem;
}
.content[data-document-type="changelog-entry"] .page-head .summary {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 0.75rem;
}
.content[data-document-type="changelog-entry"] .page-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 1rem;
  margin-bottom: 0.25rem;
}
.content[data-document-type="changelog-entry"] .page-meta :is(.page-date, .page-version, .verified) {
  margin: 0;
  font-size: 0.75rem;
  color: var(--color-muted);
}

/* The wordmark stays readable to screen readers; the shoal mark is decorative. */
.brand::before {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0;
  transform: none;
  background: var(--color-accent);
  -webkit-mask: url('/favicon.svg') center / contain no-repeat;
  mask: url('/favicon.svg') center / contain no-repeat;
}

/* Home page: a splash layout. The hero is a stretch of shallow riverbed that docs/site-interactions.js draws into .hero-river. */
:root[data-layout="splash"] .content .hero {
  display: grid;
  align-content: center;
  justify-items: center;
  min-height: clamp(30rem, 78vh, 46rem);
  overflow: hidden;
  isolation: isolate;
}
:root[data-layout="splash"] .content .hero > :not(.hero-river) { position: relative; z-index: 1; }
.hero-river { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; pointer-events: none; }
:root[data-layout="splash"] .content .hero-title { font-size: clamp(2.5rem, 6.5vw, 5.75rem); letter-spacing: -0.055em; max-width: 19ch; text-wrap: balance; }
/* Before the script runs, and when it can't, a soft light still drifts across the water. */
:root[data-layout="splash"] .content .hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(38% 55% at 25% 35%, color-mix(in srgb, var(--color-accent) 10%, transparent), transparent 70%),
    radial-gradient(34% 50% at 75% 65%, color-mix(in srgb, var(--color-accent) 8%, transparent), transparent 70%);
  background-size: 160% 160%;
  animation: hero-current 18s ease-in-out infinite alternate;
  pointer-events: none;
}
/* Once the canvas is drawing the water, the CSS glow steps aside. */
:root[data-layout="splash"] .content .hero.has-river::before { display: none; }
@keyframes hero-current { to { background-position: 100% 60%; } }

/* The hero text arrives one line at a time. */
@keyframes hero-in { from { opacity: 0; transform: translateY(14px); } }
:root[data-layout="splash"] .content .hero-title { animation: hero-in 0.9s 0.05s cubic-bezier(0.2, 0.7, 0.2, 1) backwards; }
:root[data-layout="splash"] .content .hero-tagline { animation: hero-in 0.9s 0.22s cubic-bezier(0.2, 0.7, 0.2, 1) backwards; }
:root[data-layout="splash"] .content .hero-actions { animation: hero-in 0.9s 0.38s cubic-bezier(0.2, 0.7, 0.2, 1) backwards; }

/* Every section heading sits on a flowing waterline. */
.splash-inner > h2:first-child { position: relative; padding-top: 1.75rem; font-size: clamp(1.75rem, 3.6vw, 2.6rem); letter-spacing: -0.035em; }
.splash-inner > h2:first-child::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 7rem;
  height: 0.6rem;
  background: var(--color-accent);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='10' viewBox='0 0 28 10'%3E%3Cpath d='M0 5 Q7 0 14 5 T28 5' fill='none' stroke='black' stroke-width='1.6'/%3E%3C/svg%3E") 0 0 / 28px 10px repeat-x;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='10' viewBox='0 0 28 10'%3E%3Cpath d='M0 5 Q7 0 14 5 T28 5' fill='none' stroke='black' stroke-width='1.6'/%3E%3C/svg%3E") 0 0 / 28px 10px repeat-x;
  animation: waterline 3s linear infinite;
}
@keyframes waterline { to { -webkit-mask-position: 28px 0; mask-position: 28px 0; } }

/* Sections surface as they scroll into view; cards catch light under the pointer. */
[data-reveal] { opacity: 0; transform: translateY(18px); }
[data-reveal].is-in {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: calc(var(--i, 0) * 80ms);
}
:root[data-layout="splash"] .content ul.doc-cards .doc-card:hover {
  background-image: radial-gradient(16rem circle at var(--mx, 50%) var(--my, 50%), color-mix(in srgb, var(--color-accent) 13%, transparent), transparent 70%);
}

/* The closing section is a deep pool. */
.splash-section[data-variant="cta"] { border-top: 1px solid var(--color-border); text-align: center; }
.splash-section[data-variant="cta"] .splash-inner { max-width: 44rem; }
.splash-section[data-variant="cta"] h2:first-child::before { left: 50%; transform: translateX(-50%); }
.splash-section[data-variant="cta"] .code-block { text-align: left; }

@media (prefers-reduced-motion: reduce) {
  :root[data-layout="splash"] .content .hero::before,
  :root[data-layout="splash"] .content .hero-title,
  :root[data-layout="splash"] .content .hero-tagline,
  :root[data-layout="splash"] .content .hero-actions,
  .splash-inner > h2:first-child::before { animation: none; }
  [data-reveal], [data-reveal].is-in { opacity: 1; transform: none; transition: none; }
}

/* The previewer's Markdown fallback tables belong in the twin, not on a marketing page. */
.splash-section .theme-preview > :not(.theme-preview-controls) { display: none; }


/* A compact preview banner bridges the river hero and the first section. */
:root[data-layout="splash"] .content .hero + blockquote.callout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 1.5rem 3rem;
  width: min(70rem, calc(100% - 3rem));
  box-sizing: border-box;
  margin: -1.25rem auto 0;
  padding: 1.6rem 2rem;
  border: 1px solid color-mix(in srgb, var(--color-accent) 25%, var(--color-border));
  border-radius: 1rem;
  background: linear-gradient(115deg, color-mix(in srgb, var(--color-accent) 9%, var(--color-surface)), var(--color-surface));
  color: var(--color-ink);
  box-shadow: 0 .75rem 2rem color-mix(in srgb, var(--color-ink) 8%, transparent);
}
:root[data-layout="splash"] .content .hero + blockquote.callout > p {
  max-width: none;
  margin: 0;
  line-height: 1.65;
}
:root[data-layout="splash"] .content .hero + blockquote.callout .callout-icon { display: none; }
:root[data-layout="splash"] .content .hero + blockquote.callout > p:first-child > strong {
  display: block;
  margin-bottom: .4rem;
  color: var(--color-accent);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}
:root[data-layout="splash"] .content .hero + blockquote.callout > p:last-child a {
  display: inline-flex;
  align-items: center;
  padding: .65rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: .6rem;
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: .875rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}
:root[data-layout="splash"] .content .hero + blockquote.callout > p:last-child a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
@media (max-width: 640px) {
  :root[data-layout="splash"] .content .hero + blockquote.callout {
    grid-template-columns: 1fr;
    width: calc(100% - 2rem);
    padding: 1.25rem;
    gap: 1rem;
  }
}

/* Put the document closer to its title without removing its context. */
:root:not([data-layout="splash"]) .layout:not(.api-reference) .page-head {
  padding-bottom: .75rem;
  margin-bottom: .65rem;
}
:root:not([data-layout="splash"]) .layout:not(.api-reference) .page-head h1 {
  margin-block: .4rem .55rem;
}
:root:not([data-layout="splash"]) .layout:not(.api-reference) .page-head .summary {
  margin-bottom: .65rem;
  line-height: 1.5;
}
.content:has(.docs-map) .page-head :is(.eyebrow, .page-date) { display: none; }
.content:has(.docs-map) .page-head { margin-bottom: .4rem; padding-bottom: .65rem; }
.content:has(.docs-map) .page-formats { margin-block: 0 .5rem; padding-block: 0; }
.content:has(.docs-map) .page-formats .formats { min-height: 0; padding-block: .2rem; font-size: .7rem; }