/* LibrarySearch website — dark engineering theme
   Palette: bg #0c1118 / panel #131a24 / line #243044
            accent cyan #35d0ba  accent2 orange #f0a24b
            text #dbe4f0  muted #8496ad */

:root {
  --bg: #0c1118;
  --bg-soft: #0f1620;
  --panel: #131a24;
  --panel-hi: #182230;
  --line: #243044;
  --line-soft: #1b2534;
  --text: #dbe4f0;
  --muted: #8496ad;
  --accent: #35d0ba;
  --accent-dim: #1f8f80;
  --accent-soft: rgba(53, 208, 186, .12);
  --accent2: #f0a24b;
  --accent2-soft: rgba(240, 162, 75, .12);
  --danger: #e57373;
  --danger-soft: rgba(229, 115, 115, .1);
  --mono: "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;
  --sans: "Segoe UI", "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.75 var(--sans);
  -webkit-font-smoothing: antialiased;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(12, 17, 24, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft);
}

.nav {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  letter-spacing: .02em;
}

.brand img { width: 26px; height: 26px; display: block; }

.brand .ver {
  font: 600 11px/1 var(--mono);
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(53, 208, 186, .35);
  border-radius: 4px;
  padding: 3px 7px;
  margin-left: 4px;
}

.nav-links {
  display: flex;
  gap: 4px;
  margin-left: 8px;
  flex: 1;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 12px;
  border-radius: 6px;
  transition: color .15s, background .15s;
}

.nav-links a:hover { color: var(--text); background: var(--panel-hi); }
.nav-links a.active { color: var(--accent); background: var(--accent-soft); }

.lang-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px;
}

.lang-switch a {
  font-size: 12.5px;
  padding: 3px 9px;
  border-radius: 4px;
  color: var(--muted);
  text-decoration: none;
}

.lang-switch a.active { background: var(--accent); color: #06231f; font-weight: 700; }

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

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

.page-head { padding: 52px 0 8px; }

.eyebrow {
  font: 700 12px/1 var(--mono);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

h1 {
  font-size: 40px;
  line-height: 1.25;
  margin: 0 0 14px;
  letter-spacing: -.01em;
}

h2 { font-size: 24px; margin: 52px 0 16px; }
h3 { font-size: 17px; margin: 24px 0 10px; }
p { margin: 10px 0; }

.lead { font-size: 17px; color: var(--muted); max-width: 720px; }

a { color: var(--accent); }
a:hover { text-decoration: underline; }

.divider { border: 0; border-top: 1px solid var(--line-soft); margin: 44px 0; }

/* ---------- hero ---------- */

.hero {
  padding: 76px 0 64px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto;
  height: 130%;
  background:
    radial-gradient(600px 340px at 18% 30%, rgba(53, 208, 186, .13), transparent 70%),
    radial-gradient(520px 320px at 82% 12%, rgba(240, 162, 75, .08), transparent 70%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 56px;
  align-items: center;
}

.hero h1 { font-size: 44px; }

.hero .lead { font-size: 18px; }

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: 600 12.5px/1 var(--mono);
  color: var(--accent2);
  background: var(--accent2-soft);
  border: 1px solid rgba(240, 162, 75, .35);
  border-radius: 5px;
  padding: 6px 11px;
  margin-bottom: 22px;
}

.hero-tag .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent2);
  animation: pulse 2.2s infinite;
}

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }

.hero-meta {
  margin-top: 26px;
  font-size: 13px;
  color: var(--muted);
  font-family: var(--mono);
}

.hero-visual { position: relative; }
.hero-visual .glow {
  position: absolute;
  inset: 8% 4%;
  background: radial-gradient(closest-side, rgba(53, 208, 186, .16), transparent);
  filter: blur(6px);
}

.hero-visual img, .hero-visual svg {
  position: relative;
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 18px 44px rgba(0, 0, 0, .5));
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 22px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform .12s, box-shadow .12s, background .15s;
}

.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn-primary {
  background: var(--accent);
  color: #06231f;
  box-shadow: 0 6px 22px rgba(53, 208, 186, .25);
}

.btn-primary:hover { background: #46ddc7; }

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
  background: var(--panel);
}

.btn-ghost:hover { border-color: var(--accent-dim); color: var(--accent); }

.btn .k { font: 700 11px/1 var(--mono); opacity: .75; }

/* ---------- warning banner ---------- */

.beta-banner {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--accent2-soft);
  border: 1px solid rgba(240, 162, 75, .4);
  border-left: 4px solid var(--accent2);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 28px 0;
  font-size: 14px;
}

.beta-banner .icon { color: var(--accent2); font-size: 17px; line-height: 1.4; }
.beta-banner strong { color: var(--accent2); }

/* ---------- feature cards ---------- */

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

.feature {
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 26px;
  transition: border-color .15s, transform .15s;
}

.feature:hover { border-color: var(--accent-dim); transform: translateY(-2px); }

.feature .f-icon {
  width: 42px; height: 42px;
  border-radius: 9px;
  background: var(--accent-soft);
  border: 1px solid rgba(53, 208, 186, .3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature .f-icon svg { width: 22px; height: 22px; stroke: var(--accent); }

.feature h3 { margin: 0 0 8px; }
.feature p { color: var(--muted); font-size: 14px; margin: 0; }

/* ---------- steps ---------- */

.steps { counter-reset: step; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

.step {
  counter-increment: step;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 24px;
}

.step::before {
  content: counter(step, decimal-leading-zero);
  font: 700 26px/1 var(--mono);
  color: var(--accent);
  opacity: .55;
  display: block;
  margin-bottom: 14px;
}

.step h3 { margin: 0 0 8px; font-size: 16px; }
.step p { color: var(--muted); font-size: 14px; margin: 0; }

/* ---------- download cards ---------- */

.dl-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.dl-card.primary { border-color: var(--accent-dim); box-shadow: 0 0 0 1px rgba(53, 208, 186, .18), 0 14px 36px rgba(0, 0, 0, .35); }

.dl-card h3 { margin: 0; display: flex; align-items: center; gap: 10px; }

.dl-badge {
  font: 700 10.5px/1 var(--mono);
  letter-spacing: .08em;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(53, 208, 186, .35);
  border-radius: 4px;
  padding: 4px 8px;
}

.dl-card .desc { color: var(--muted); font-size: 14px; margin: 0; }

.dl-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font: 500 12.5px/1.6 var(--mono);
  color: var(--muted);
}

.dl-meta b { color: var(--text); font-weight: 600; }

.hash-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: 7px;
  padding: 8px 12px;
  margin-top: 4px;
}

.hash-row code {
  font: 500 11.5px/1.5 var(--mono);
  color: var(--accent);
  overflow-wrap: anywhere;
  flex: 1;
}

.copy-btn {
  flex-shrink: 0;
  font: 600 11.5px/1 var(--mono);
  color: var(--muted);
  background: var(--panel-hi);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 6px 10px;
  cursor: pointer;
  transition: color .15s, border-color .15s;
}

.copy-btn:hover { color: var(--accent); border-color: var(--accent-dim); }
.copy-btn.done { color: var(--accent); border-color: var(--accent-dim); }

.dl-card .btn { margin-top: 10px; justify-content: center; }

/* ---------- tables ---------- */

.table-wrap { overflow-x: auto; }

table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
  font-size: 14px;
}

th, td {
  text-align: left;
  vertical-align: top;
  padding: 11px 14px;
  border: 1px solid var(--line-soft);
}

th {
  background: var(--panel-hi);
  font-weight: 600;
  white-space: nowrap;
}

td { background: var(--panel); }
td code { font-size: 12.5px; }

.ok { color: var(--accent); font-weight: 600; }
.no { color: var(--danger); font-weight: 600; }
.warn { color: var(--accent2); font-weight: 600; }

/* ---------- changelog ---------- */

.release {
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 22px 26px;
  margin-bottom: 14px;
}

.release-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.release-head .ver { font: 700 16px/1 var(--mono); color: var(--accent); }
.release-head .date { font: 500 12.5px/1 var(--mono); color: var(--muted); }

.tag {
  font: 700 10.5px/1 var(--mono);
  letter-spacing: .07em;
  text-transform: uppercase;
  border-radius: 4px;
  padding: 4px 8px;
}

.tag.feature { color: var(--accent); background: var(--accent-soft); border: 1px solid rgba(53, 208, 186, .35); }
.tag.fix { color: var(--accent2); background: var(--accent2-soft); border: 1px solid rgba(240, 162, 75, .35); }
.tag.ui { color: #7ba7e8; background: rgba(123, 167, 232, .12); border: 1px solid rgba(123, 167, 232, .35); }

.release p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }

.release.latest { border-color: var(--accent-dim); }

.release .latest-mark {
  font: 700 10.5px/1 var(--mono);
  color: #06231f;
  background: var(--accent);
  border-radius: 4px;
  padding: 4px 8px;
  letter-spacing: .06em;
}

/* ---------- guide ---------- */

.guide-section { margin: 44px 0; }

.guide-num {
  font: 700 13px/1 var(--mono);
  color: var(--accent);
  letter-spacing: .18em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.callout {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
  padding: 13px 18px;
  margin: 18px 0;
  font-size: 14px;
}

.callout.warning { border-left-color: var(--accent2); background: var(--accent2-soft); }
.callout.danger { border-left-color: var(--danger); background: var(--danger-soft); }

code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--panel-hi);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  padding: 1.5px 6px;
  overflow-wrap: anywhere;
}

pre {
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  padding: 20px 22px;
  overflow-x: auto;
  font: 500 13px/1.85 var(--mono);
  color: #b9c8dd;
}

pre code { background: none; border: 0; padding: 0; font-size: 13px; color: inherit; }

kbd {
  font: 600 12px/1 var(--mono);
  background: var(--panel-hi);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 2px 7px;
}

.flow-list { counter-reset: flow; list-style: none; padding: 0; margin: 18px 0; }

.flow-list li {
  counter-increment: flow;
  position: relative;
  padding: 0 0 22px 52px;
}

.flow-list li::before {
  content: counter(flow);
  position: absolute;
  left: 0;
  top: 1px;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--accent-soft);
  border: 1px solid rgba(53, 208, 186, .4);
  color: var(--accent);
  font: 700 14px/30px var(--mono);
  text-align: center;
}

.flow-list li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 16px;
  top: 36px;
  bottom: 2px;
  width: 1px;
  background: var(--line);
}

.flow-list li b { display: block; margin-bottom: 3px; }
.flow-list li span { color: var(--muted); font-size: 14px; }

/* ---------- panels / misc ---------- */

.panel {
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 26px;
}

.muted { color: var(--muted); }
.small { font-size: 13px; }

.check-list { list-style: none; padding: 0; margin: 14px 0; }
.check-list li { padding: 5px 0 5px 26px; position: relative; }
.check-list li::before {
  content: "▸";
  position: absolute;
  left: 6px;
  color: var(--accent);
  font-weight: 700;
}

details.old-releases {
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 6px 26px;
  margin-top: 26px;
}

details.old-releases summary {
  cursor: pointer;
  padding: 14px 0;
  font-weight: 600;
  color: var(--muted);
  user-select: none;
}

details.old-releases[open] summary { color: var(--text); border-bottom: 1px solid var(--line-soft); margin-bottom: 8px; }

noscript.fallback {
  display: block;
  background: var(--accent2-soft);
  border: 1px solid rgba(240, 162, 75, .4);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 20px 0;
  font-size: 14px;
}

/* ---------- footer ---------- */

.site-footer {
  margin-top: 80px;
  border-top: 1px solid var(--line-soft);
  background: var(--bg-soft);
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 36px 24px 44px;
  display: flex;
  flex-wrap: wrap;
  gap: 28px 60px;
  font-size: 13.5px;
  color: var(--muted);
}

.footer-inner .col { min-width: 200px; }
.footer-inner h4 { margin: 0 0 10px; font-size: 13px; color: var(--text); }
.footer-inner a { color: var(--muted); text-decoration: none; display: block; padding: 3px 0; }
.footer-inner a:hover { color: var(--accent); }

.footer-bottom {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px 30px;
  font-size: 12.5px;
  color: #5c6c82;
}

.footer-bottom .mono { font-family: var(--mono); }

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

@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 460px; }
  .grid-3, .steps { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .nav { padding: 0 16px; gap: 10px; }
  .nav-links { gap: 0; }
  .nav-links a { padding: 6px 8px; font-size: 13px; }
  .brand .ver { display: none; }
  h1 { font-size: 30px; }
  .hero h1 { font-size: 32px; }
  .wrap { padding: 0 18px; }
  .dl-card, .feature, .step, .release { padding: 20px; }
  th, td { padding: 8px 10px; }
}