/* ============================================================
   UnderHost Docs-Components
   Cards, search, docs layout, callouts, code blocks, TOC, etc.
   ============================================================ */

/* ============================================================
   HERO (homepage)
   ============================================================ */
.uh-docs-hero {
  position: relative; overflow: visible;
  background:
    radial-gradient(circle at 16% 18%, rgba(0,212,255,0.18), transparent 38%),
    radial-gradient(circle at 86% 4%, rgba(0,145,214,0.18), transparent 42%),
    var(--uh-gradient-primary);
  color: #fff;
  padding: 84px 0 96px;
  border-bottom: 1px solid rgba(0,212,255,0.16);
}
.uh-docs-hero::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(0,212,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.045) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 72%);
}
.uh-docs-hero-inner { position: relative; z-index: 2; text-align: center; max-width: 860px; margin-inline: auto; }
.uh-docs-hero .uh-pill { background: rgba(0,212,255,0.12); margin-bottom: 22px; }
.uh-docs-hero h1 {
  color: #fff; font-size: clamp(36px, 5.4vw, 58px); font-weight: 800; letter-spacing: -0.03em;
  margin-bottom: 18px;
}
.uh-docs-hero h1 .grad {
  background: linear-gradient(120deg, #fff 10%, #7fe8ff 55%, #00D4FF);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.uh-docs-hero-sub { font-size: clamp(16px, 2vw, 19px); color: rgba(255,255,255,0.74); max-width: 660px; margin: 0 auto 34px; }

/* big hero search */
.uh-hero-search { position: relative; z-index: 40; max-width: 640px; margin: 0 auto; }
.uh-hero-search-box {
  display: flex; align-items: center; gap: 12px;
  background: rgba(255,255,255,0.97);
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: 16px; padding: 6px 6px 6px 20px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.34), 0 0 0 6px rgba(0,212,255,0.10);
  transition: box-shadow 180ms ease;
}
.uh-hero-search-box:focus-within { box-shadow: 0 24px 60px rgba(0,0,0,0.4), 0 0 0 6px rgba(0,212,255,0.22); }
.uh-hero-search-box > i { color: var(--uh-secondary-dark); font-size: 18px; }
.uh-hero-search-box input {
  flex: 1; border: 0; outline: none; background: transparent; font: inherit;
  font-size: 16px; color: var(--uh-ink); padding: 14px 0; min-width: 0;
}
.uh-hero-search-box input::placeholder { color: var(--uh-ink-faint); }
.uh-hero-popular { margin-top: 20px; display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; }
.uh-hero-popular .label { font-size: 13px; color: rgba(255,255,255,0.6); font-weight: 600; }
.uh-hero-popular a {
  font-size: 13px; font-weight: 600; color: rgba(255,255,255,0.85);
  padding: 5px 12px; border-radius: 999px;
  background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.14);
}
.uh-hero-popular a:hover { background: rgba(0,212,255,0.16); border-color: var(--uh-border-primary); color: #fff; }

/* hero trust strip */
.uh-hero-trust { display: flex; justify-content: center; gap: 30px; flex-wrap: wrap; margin-top: 40px; }
.uh-hero-trust .item { display: inline-flex; align-items: center; gap: 9px; font-size: 14px; font-weight: 600; color: rgba(255,255,255,0.78); }
.uh-hero-trust .item i { color: var(--uh-primary); }

/* ============================================================
   SEARCH DROPDOWN (shared, instant results)
   ============================================================ */
.uh-search-results {
  position: absolute; top: calc(100% + 10px); left: 0; right: 0; z-index: 6000;
  background: #fff; border: 1px solid var(--uh-border); border-radius: 14px;
  box-shadow: 0 24px 60px rgba(10,18,32,0.22); overflow: hidden;
  max-height: 70vh; overflow-y: auto; display: none; text-align: left;
}
.uh-search-results.is-open { display: block; }
.uh-search-results .group-label {
  font-size: 11px; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--uh-ink-faint); padding: 14px 18px 6px;
}
.uh-search-hit {
  display: block; padding: 11px 18px; border-bottom: 1px solid var(--uh-border-soft);
  cursor: pointer; transition: background 120ms ease;
}
.uh-search-hit:last-child { border-bottom: 0; }
.uh-search-hit:hover, .uh-search-hit.is-active { background: var(--uh-surface-soft); }
.uh-search-hit .hit-title { font-size: 14.5px; font-weight: 700; color: var(--uh-ink); margin-bottom: 3px; }
.uh-search-hit .hit-title mark { background: rgba(0,212,255,0.24); color: inherit; border-radius: 3px; padding: 0 1px; }
.uh-search-hit .hit-excerpt { font-size: 13px; color: var(--uh-ink-soft); margin-bottom: 6px; line-height: 1.45; }
.uh-search-hit .hit-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.uh-search-hit .hit-cat { font-size: 12px; font-weight: 600; color: var(--uh-secondary-dark); display: inline-flex; align-items: center; gap: 5px; }
.uh-search-empty { padding: 28px 20px; text-align: center; color: var(--uh-ink-faint); font-size: 14px; }
.uh-search-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 18px; background: var(--uh-surface-soft); font-size: 12px; color: var(--uh-ink-faint);
  position: sticky; bottom: 0;
}
.uh-search-foot kbd { font-family: var(--uh-font-mono); border: 1px solid var(--uh-border); border-radius: 4px; padding: 1px 6px; background: #fff; }

/* dark hero search dropdown variant uses same styles (always white) */

/* ============================================================
   CARDS
   ============================================================ */
.uh-card {
  background: var(--uh-surface); border: 1px solid var(--uh-border);
  border-radius: var(--uh-radius-xl); box-shadow: var(--uh-shadow-card);
  overflow: hidden;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}
.uh-card:hover { transform: translateY(-3px); border-color: var(--uh-border-secondary); box-shadow: var(--uh-shadow-card-hover); }

.uh-icon-box {
  width: 46px; height: 46px; border-radius: 13px; flex: 0 0 auto;
  display: flex; align-items: center; justify-content: center; font-size: 19px;
  background: rgba(0,212,255,0.10); color: var(--uh-secondary-dark);
  border: 1px solid var(--uh-border-primary);
}
.uh-icon-box-lg { width: 54px; height: 54px; font-size: 22px; border-radius: 15px; }

/* quick-link chips grid (hero quick links) */
.uh-quicklinks { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; margin-top: 0; }
.uh-quicklink {
  display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center;
  padding: 18px 12px; border-radius: 14px; background: var(--uh-surface);
  border: 1px solid var(--uh-border); box-shadow: var(--uh-shadow-card);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}
.uh-quicklink:hover { transform: translateY(-3px); border-color: var(--uh-border-primary); box-shadow: var(--uh-shadow-card-hover); }
.uh-quicklink .uh-icon-box { width: 40px; height: 40px; font-size: 16px; }
.uh-quicklink span { font-size: 13px; font-weight: 700; color: var(--uh-ink); line-height: 1.3; }

/* featured guide card */
.uh-guide-card { display: flex; flex-direction: column; padding: 22px; gap: 14px; height: 100%; }
.uh-guide-card .guide-head { display: flex; align-items: center; gap: 13px; }
.uh-guide-card h3 { font-size: 16.5px; font-weight: 700; }
.uh-guide-card p { font-size: 14px; color: var(--uh-ink-soft); margin: 0; flex: 1; }
.uh-guide-card .guide-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding-top: 4px; margin-top: auto;
}
.uh-guide-card .guide-foot .read {
  font-size: 13px; font-weight: 700; color: var(--uh-secondary-dark);
  display: inline-flex; align-items: center; gap: 6px;
}
.uh-guide-card:hover .guide-foot .read i { transform: translateX(3px); }
.uh-guide-card .guide-foot .read i { transition: transform 160ms ease; }

/* product / platform / category card */
.uh-cat-card { display: flex; flex-direction: column; gap: 12px; padding: 22px; height: 100%; }
.uh-cat-card .cat-head { display: flex; align-items: flex-start; gap: 13px; }
.uh-cat-card h3 { font-size: 16px; font-weight: 700; }
.uh-cat-card .count { font-size: 12.5px; color: var(--uh-ink-faint); font-weight: 600; margin-top: 2px; }
.uh-cat-card p { font-size: 13.5px; color: var(--uh-ink-soft); margin: 0; }

/* compact platform/tool chip card */
.uh-chip-card {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  background: var(--uh-surface); border: 1px solid var(--uh-border);
  border-radius: 14px; box-shadow: var(--uh-shadow-card);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}
.uh-chip-card:hover { transform: translateY(-2px); border-color: var(--uh-border-primary); box-shadow: var(--uh-shadow-card-hover); }
.uh-chip-card .uh-icon-box { width: 38px; height: 38px; font-size: 15px; border-radius: 11px; }
.uh-chip-card .chip-body { min-width: 0; }
.uh-chip-card h4 { font-size: 14px; font-weight: 700; margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.uh-chip-card p { font-size: 12.5px; color: var(--uh-ink-faint); margin: 1px 0 0; }

/* grids */
.uh-grid { display: grid; gap: 18px; }
.uh-grid-2 { grid-template-columns: repeat(2, 1fr); }
.uh-grid-3 { grid-template-columns: repeat(3, 1fr); }
.uh-grid-4 { grid-template-columns: repeat(4, 1fr); }
.uh-grid-auto { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

/* section block on light */
.uh-section { padding: 72px 0; }
.uh-section-soft { background: var(--uh-surface-soft); }
.uh-section-tight { padding: 48px 0; }

/* ============================================================
   DOCS LAYOUT (sidebar + content + TOC)
   ============================================================ */
.uh-docs-shell {
  width: min(100% - 32px, var(--uh-container-wide));
  margin-inline: auto;
  display: grid;
  grid-template-columns: var(--uh-sidebar-w) minmax(0, 1fr) var(--uh-toc-w);
  gap: 38px; align-items: start;
}
.uh-docs-shell.no-toc { grid-template-columns: var(--uh-sidebar-w) minmax(0, 1fr); }
.uh-docs-shell.no-sidebar { grid-template-columns: minmax(0,1fr) var(--uh-toc-w); }

/* sidebar */
.uh-sidebar {
  position: sticky; top: calc(var(--uh-header-h) + 22px);
  align-self: start;
  max-height: calc(100vh - var(--uh-header-h) - 40px);
  overflow-y: auto; padding: 24px 6px 40px 0;
  scrollbar-width: thin;
}
.uh-sidebar-search { position: relative; margin-bottom: 18px; }
.uh-sidebar-search input {
  width: 100%; height: 40px; padding: 0 12px 0 36px;
  border: 1px solid var(--uh-border); border-radius: 10px; font: inherit; font-size: 13.5px;
  background: var(--uh-surface-soft); color: var(--uh-ink);
}
.uh-sidebar-search input:focus { outline: none; border-color: var(--uh-secondary); background: #fff; box-shadow: 0 0 0 3px rgba(0,145,214,0.08); }
.uh-sidebar-search > i { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--uh-ink-faint); font-size: 13px; }
.uh-sidebar-block-search { margin-bottom: 18px; }
.uh-sidebar-heading {
  margin: 0 0 10px 10px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--uh-ink-faint);
}
.uh-sidebar-heading-categories { margin-top: 4px; }
.uh-sidebar-menu {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--uh-border);
}

.uh-nav-group { margin-bottom: 6px; }
.uh-nav-group > button {
  width: 100%; display: flex; align-items: center; gap: 10px;
  background: none; border: 0; cursor: pointer; padding: 9px 10px; border-radius: 9px;
  font-family: var(--uh-font-sans); font-size: 13.5px; font-weight: 700; color: var(--uh-ink);
  text-align: left; transition: background 140ms ease;
}
.uh-nav-group > button:hover { background: var(--uh-surface-soft); }
.uh-nav-group > button .nav-ico { width: 20px; color: var(--uh-secondary-dark); font-size: 13px; text-align: center; flex: 0 0 auto; }
.uh-nav-group > button .nav-label { flex: 1; }
.uh-nav-group > button .nav-chev { font-size: 11px; color: var(--uh-ink-faint); transition: transform 180ms ease; }
.uh-nav-group.is-open > button .nav-chev { transform: rotate(90deg); }
.uh-nav-sub { list-style: none; margin: 2px 0 4px; padding: 0 0 0 30px; display: none; }
.uh-nav-group.is-open .uh-nav-sub { display: block; }
.uh-nav-sub li { margin: 0; }
.uh-nav-sub a {
  display: block; padding: 7px 12px; border-radius: 8px; font-size: 13px; font-weight: 500;
  color: var(--uh-ink-soft); border-left: 2px solid transparent; transition: all 130ms ease;
}
.uh-nav-sub a:hover { background: var(--uh-surface-soft); color: var(--uh-ink); }
.uh-nav-sub a.is-active {
  color: var(--uh-secondary-dark); font-weight: 700; background: rgba(0,212,255,0.07);
  border-left-color: var(--uh-primary);
}

/* mobile sidebar drawer */
.uh-sidebar-backdrop { display: none; position: fixed; inset: 0; background: rgba(10,18,32,0.5); z-index: 1100; backdrop-filter: blur(2px); }
.uh-sidebar-backdrop.is-open { display: block; }

/* content column */
.uh-docs-content { min-width: 0; padding: 30px 0 70px; }

/* breadcrumbs */
.uh-breadcrumbs { display: flex; align-items: center; flex-wrap: wrap; gap: 7px; font-size: 13px; color: var(--uh-ink-faint); margin-bottom: 20px; }
.uh-breadcrumbs a { color: var(--uh-ink-faint); font-weight: 500; }
.uh-breadcrumbs a:hover { color: var(--uh-secondary-dark); }
.uh-breadcrumbs .sep { color: var(--uh-border); font-size: 10px; }
.uh-breadcrumbs .current { color: var(--uh-ink); font-weight: 600; }

/* TOC */
.uh-toc { position: sticky; top: calc(var(--uh-header-h) + 22px); align-self: start; padding: 30px 0; max-height: calc(100vh - var(--uh-header-h)); overflow-y: auto; }
.uh-toc-title { font-size: 11px; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; color: var(--uh-ink-faint); margin-bottom: 14px; }
.uh-toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--uh-border); }
.uh-toc li { margin: 0; }
.uh-toc a { display: block; padding: 6px 0 6px 16px; margin-left: -1px; font-size: 13px; color: var(--uh-ink-faint); border-left: 2px solid transparent; line-height: 1.4; transition: all 130ms ease; }
.uh-toc a:hover { color: var(--uh-ink); }
.uh-toc a.is-active { color: var(--uh-secondary-dark); font-weight: 700; border-left-color: var(--uh-primary); }
.uh-toc a.lvl-3 { padding-left: 28px; font-size: 12.5px; }

/* ============================================================
   RESPONSIVE-docs shell, grids, quicklinks
   ============================================================ */
@media (max-width: 1024px) {
  /* docs pages collapse to single column; sidebar becomes off-canvas drawer */
  .uh-docs-shell,
  .uh-docs-shell.no-toc,
  .uh-docs-shell.no-sidebar { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .uh-toc { display: none; }
  .uh-inline-toc { display: block; }

  .uh-sidebar {
      position: fixed; top: 0; left: 0; bottom: 0; z-index: 1200;
      width: min(86vw, 340px); max-height: none;
      background: #fff; border-right: 1px solid var(--uh-border);
      box-shadow: 0 0 60px rgba(10,18,32,0.34);
      transform: translateX(-100%); transition: transform 0.26s ease;
      padding: 20px 16px 48px; overflow-y: auto;
    }
  .uh-sidebar-heading { margin-left: 6px; }
  .uh-sidebar.is-drawer-open { transform: none; }
  .uh-docs-content { padding-top: 22px; }
}

/* grids */
@media (max-width: 1024px) {
  .uh-grid-4 { grid-template-columns: repeat(3, 1fr); }
  .uh-quicklinks { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 860px) {
  .uh-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .uh-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .uh-quicklinks { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 600px) {
  .uh-grid-2, .uh-grid-3, .uh-grid-4 { grid-template-columns: 1fr; }
  .uh-quicklinks { grid-template-columns: repeat(2, 1fr); }
  .uh-section { padding: 52px 0; }
  .uh-section-head h2 { font-size: 26px; }
}