/* Ledra documentation theme — no external fonts, no CDN, CSP-safe. */

:root {
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --bg-inset: #f0f2f5;
  --text: #1f2328;
  --text-soft: #5b6570;
  --border: #e3e6ea;
  --accent: #5865f2;
  --accent-soft: #eceefe;
  --ok: #1a7f4b;
  --ok-bg: #e9f7ef;
  --warn: #8a6100;
  --warn-bg: #fdf5e2;
  --info: #1f5fa9;
  --info-bg: #eaf2fc;
  --code-bg: #f0f2f5;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 4px 12px rgba(16, 24, 40, .05);
  --sidebar-w: 17rem;
  --toc-w: 15rem;
  --radius: 8px;
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #16181d;
  --bg-soft: #1b1e24;
  --bg-inset: #21252c;
  --text: #e6e9ee;
  --text-soft: #9aa4b2;
  --border: #2b3038;
  --accent: #8b95ff;
  --accent-soft: #24283c;
  --ok: #5fd39b;
  --ok-bg: #16281f;
  --warn: #e7bd5c;
  --warn-bg: #2a2417;
  --info: #79b0f0;
  --info-bg: #17222e;
  --code-bg: #21252c;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 12px rgba(0, 0, 0, .25);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: #fff; padding: .6rem 1rem;
}
.skip:focus { left: .5rem; top: .5rem; }

/* ---------- top bar ---------- */

.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: .75rem;
  height: 3.5rem; padding: 0 1rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex; align-items: center; gap: .55rem;
  font-weight: 650; color: var(--text); white-space: nowrap;
}
.brand:hover { text-decoration: none; }
/* The shield mark itself, not an abstract square — one asset, one identity.
   background-image falls under img-src 'self', so the strict CSP allows it. */
.brand-mark {
  width: 1.3rem; height: 1.3rem;
  background: url("favicon.svg") center / contain no-repeat;
}

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.25rem; height: 2.25rem; flex: none;
  background: none; border: 1px solid transparent; border-radius: var(--radius);
  color: var(--text-soft); font-size: 1.05rem; cursor: pointer;
}
.icon-btn:hover { background: var(--bg-inset); color: var(--text); }

#menu-btn { display: none; }
.bars, .bars::before, .bars::after {
  display: block; width: 16px; height: 2px;
  background: currentColor; border-radius: 2px;
}
.bars { position: relative; }
.bars::before, .bars::after { content: ""; position: absolute; left: 0; }
.bars::before { top: -5px; }
.bars::after { top: 5px; }

/* ---------- search ---------- */

.search-wrap { position: relative; margin-left: auto; width: min(22rem, 45vw); }

#search {
  width: 100%; height: 2.25rem; padding: 0 .75rem;
  background: var(--bg-soft); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius);
  font: inherit; font-size: .9rem;
}
#search::placeholder { color: var(--text-soft); }

.results {
  position: absolute; top: calc(100% + .4rem); right: 0;
  width: min(30rem, 88vw); max-height: 60vh; overflow-y: auto;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: .3rem;
}
.results a {
  display: block; padding: .5rem .6rem; border-radius: 6px; color: var(--text);
}
.results a:hover, .results a.active { background: var(--accent-soft); text-decoration: none; }
.results .r-title { font-weight: 600; font-size: .9rem; }
.results .r-sec { font-size: .75rem; color: var(--text-soft); }
.results .r-none { padding: .6rem; color: var(--text-soft); font-size: .9rem; }

/* ---------- layout ---------- */

.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  align-items: start;
  max-width: 96rem; margin: 0 auto;
}

.sidebar {
  position: sticky; top: 3.5rem;
  height: calc(100vh - 3.5rem); overflow-y: auto;
  padding: 1.25rem .75rem 3rem;
  border-right: 1px solid var(--border);
}

.sidebar h2 {
  margin: 1.25rem .6rem .35rem;
  font-size: .72rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--text-soft);
}
.sidebar h2:first-child { margin-top: 0; }

.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar a {
  display: block; padding: .35rem .6rem; margin-bottom: 1px;
  border-radius: 6px; color: var(--text-soft); font-size: .9rem;
}
.sidebar a:hover { background: var(--bg-inset); color: var(--text); text-decoration: none; }
.sidebar a.current {
  background: var(--accent-soft); color: var(--accent); font-weight: 600;
}

main { min-width: 0; padding: 2.25rem 2.5rem 4rem; }
.page { max-width: 46rem; }

.toc {
  position: sticky; top: 3.5rem;
  max-height: calc(100vh - 3.5rem); overflow-y: auto;
  padding: 2.25rem 1rem 3rem;
  font-size: .85rem;
}
.toc h2 {
  margin: 0 0 .5rem; font-size: .72rem; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase; color: var(--text-soft);
}
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin: .15rem 0; }
.toc a { color: var(--text-soft); display: block; padding: .15rem 0; }
.toc a:hover { color: var(--text); }
.toc .lvl-3 { padding-left: .85rem; font-size: .82rem; }

.backdrop {
  position: fixed; inset: 3.5rem 0 0; z-index: 25;
  background: rgba(0, 0, 0, .35);
}

/* ---------- content ---------- */

.page h1 {
  margin: 0 0 .35rem; font-size: 2.1rem; line-height: 1.2;
  letter-spacing: -.02em;
}
.page .lead {
  margin: 0 0 2rem; color: var(--text-soft); font-size: 1.05rem;
}
.page h2 {
  margin: 2.5rem 0 .75rem; padding-top: .4rem;
  font-size: 1.4rem; letter-spacing: -.01em;
  border-top: 1px solid var(--border);
}
.page h3 { margin: 1.75rem 0 .5rem; font-size: 1.1rem; }
.page h4 { margin: 1.25rem 0 .4rem; font-size: .98rem; }

.anchor {
  float: left; margin-left: -1.1rem; width: 1.1rem;
  color: var(--text-soft); opacity: 0; text-align: left;
}
h2:hover .anchor, h3:hover .anchor, .anchor:focus { opacity: 1; text-decoration: none; }

.page p, .page ul, .page ol { margin: 0 0 1rem; }
.page li { margin: .25rem 0; }
.page hr { margin: 2.5rem 0; border: 0; border-top: 1px solid var(--border); }

.page code {
  padding: .15em .38em; border-radius: 5px;
  background: var(--code-bg); font-size: .875em;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}
.page pre {
  margin: 0 0 1.25rem; padding: .9rem 1rem; overflow-x: auto;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); line-height: 1.55;
}
.page pre code { padding: 0; background: none; font-size: .85rem; }

.page blockquote {
  margin: 0 0 1rem; padding: .1rem 0 .1rem 1rem;
  border-left: 3px solid var(--border); color: var(--text-soft);
}

.table-wrap { overflow-x: auto; margin: 0 0 1.5rem; }
.page table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.page th, .page td {
  padding: .55rem .7rem; text-align: left; vertical-align: top;
  border-bottom: 1px solid var(--border);
}
.page th {
  background: var(--bg-soft); font-weight: 600; font-size: .82rem;
  letter-spacing: .02em; white-space: nowrap;
}
.page tbody tr:hover { background: var(--bg-soft); }

/* Column alignment. Set as classes rather than inline styles so the
   Content-Security-Policy can forbid inline styles outright. */
.ta-left { text-align: left; }
.ta-center { text-align: center; }
.ta-right { text-align: right; }

/* ---------- hints ---------- */

.hint {
  margin: 0 0 1.25rem; padding: .85rem 1rem;
  border: 1px solid var(--border); border-left-width: 3px;
  border-radius: var(--radius); background: var(--bg-soft);
}
.hint > :last-child { margin-bottom: 0; }
.hint-info    { border-left-color: var(--info); background: var(--info-bg); }
.hint-success { border-left-color: var(--ok);   background: var(--ok-bg); }
.hint-warning { border-left-color: var(--warn); background: var(--warn-bg); }
.hint-danger  { border-left-color: #c0392b; background: var(--warn-bg); }

/* ---------- cards & page nav ---------- */

.ref-card {
  display: block; margin: 0 0 1.25rem; padding: .8rem 1rem;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text); font-weight: 600;
}
.ref-card:hover { border-color: var(--accent); text-decoration: none; }
.ref-card::after { content: " →"; color: var(--text-soft); font-weight: 400; }

.pagenav {
  display: flex; gap: 1rem; margin: 3rem 0 0;
  padding-top: 1.5rem; border-top: 1px solid var(--border);
}
.pagenav a {
  flex: 1; padding: .8rem 1rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--text);
}
.pagenav a:hover { border-color: var(--accent); text-decoration: none; }
.pagenav .dir { display: block; font-size: .75rem; color: var(--text-soft); }
.pagenav .nxt { text-align: right; }

.foot {
  margin-top: 2.5rem; padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--text-soft); font-size: .85rem;
}

/* ---------- responsive ---------- */

@media (max-width: 1180px) {
  .shell { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .toc { display: none; }
}

@media (max-width: 860px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  #menu-btn { display: inline-flex; }
  main { padding: 1.5rem 1.15rem 3rem; }
  .sidebar {
    position: fixed; top: 3.5rem; left: 0; z-index: 30;
    width: min(19rem, 82vw); background: var(--bg);
    transform: translateX(-102%);
    transition: transform .18s ease;
  }
  .sidebar.open { transform: none; box-shadow: var(--shadow); }
  .brand span:last-child { display: none; }
  .search-wrap { width: auto; flex: 1; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

@media print {
  .topbar, .sidebar, .toc, .pagenav, .backdrop, .skip { display: none; }
  .shell { display: block; }
  main { padding: 0; }
  .page { max-width: none; }
}