@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800&family=Heebo:wght@400;600;700;800&display=swap");

/* ── manuals & guides shared styles ── */

:root {
  --manual-bg: #09111f;
  --manual-surface: rgba(15, 23, 42, 0.88);
  --manual-surface-strong: rgba(20, 31, 54, 0.96);
  --manual-surface-soft: rgba(28, 41, 69, 0.72);
  --manual-border: rgba(148, 163, 184, 0.16);
  --manual-text: #f8fafc;
  --manual-text-soft: #cbd5e1;
  --manual-text-muted: #94a3b8;
  --manual-accent: #38bdf8;
  --manual-accent-soft: rgba(56, 189, 248, 0.12);
  --manual-shadow: 0 28px 90px rgba(2, 6, 23, 0.46);
  --manual-radius-xl: 30px;
  --manual-radius-lg: 22px;
  --manual-radius-md: 16px;
  --manual-transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  font-family: "Inter", "Heebo", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--manual-text);
  background:
    radial-gradient(circle at 20% 0%, rgba(56, 189, 248, 0.12), transparent 28%),
    radial-gradient(circle at 100% 100%, rgba(14, 165, 233, 0.08), transparent 26%),
    linear-gradient(180deg, #08101d 0%, #0a1424 42%, #0a1220 100%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── layout shell ── */

.manual-page {
  min-height: 100vh;
  padding: 40px 20px 80px;
}

.manual-shell {
  max-width: 860px;
  margin: 0 auto;
}

/* ── breadcrumbs ── */

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 28px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--manual-text-muted);
}

.breadcrumbs a {
  color: var(--manual-text-muted);
  text-decoration: none;
  transition: color var(--manual-transition);
}

.breadcrumbs a:hover {
  color: var(--manual-accent);
}

.breadcrumbs .sep {
  color: rgba(148, 163, 184, 0.35);
  user-select: none;
}

.breadcrumbs .current {
  color: var(--manual-text-soft);
}

/* ── hero / header card ── */

.manual-hero {
  border: 1px solid var(--manual-border);
  border-radius: var(--manual-radius-xl);
  background: var(--manual-surface);
  box-shadow: var(--manual-shadow);
  padding: 36px 32px;
  margin-bottom: 28px;
}

.manual-eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.22);
  background: var(--manual-accent-soft);
  color: var(--manual-accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.manual-hero h1 {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  font-weight: 800;
  line-height: 1.12;
  color: var(--manual-text);
}

.manual-summary {
  margin: 0 0 20px;
  color: var(--manual-text-soft);
  font-size: 1rem;
  line-height: 1.7;
}

.manual-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.meta-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--manual-border);
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--manual-text-muted);
}

/* ── download card ── */

.download-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px 24px;
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--manual-radius-lg);
  background: rgba(56, 189, 248, 0.06);
  margin-bottom: 28px;
  transition: border-color var(--manual-transition);
}

.download-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
}

.download-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--manual-accent-soft);
  color: var(--manual-accent);
}

.download-icon svg {
  width: 22px;
  height: 22px;
}

.download-info {
  flex: 1;
  min-width: 0;
}

.download-title {
  margin: 0 0 2px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--manual-text);
}

.download-detail {
  margin: 0;
  font-size: 0.78rem;
  color: var(--manual-text-muted);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: 999px;
  background: var(--manual-accent);
  color: #0c1222;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--manual-transition), box-shadow var(--manual-transition);
}

.download-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(56, 189, 248, 0.3);
}

/* ── section cards ── */

.manual-section {
  border: 1px solid var(--manual-border);
  border-radius: var(--manual-radius-xl);
  background: var(--manual-surface);
  box-shadow: var(--manual-shadow);
  padding: 32px;
  margin-bottom: 24px;
}

.manual-section h2 {
  margin: 0 0 18px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--manual-text);
}

.manual-section h3 {
  margin: 22px 0 10px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--manual-text);
}

.manual-section p,
.manual-section li {
  color: var(--manual-text-soft);
  line-height: 1.75;
  font-size: 0.94rem;
}

.manual-section ul,
.manual-section ol {
  padding-left: 1.4em;
  margin: 10px 0 16px;
}

.manual-section li {
  margin-bottom: 6px;
}

/* ── table of contents ── */

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-list li {
  margin-bottom: 4px;
}

.toc-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 10px;
  color: var(--manual-text-soft);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--manual-transition), color var(--manual-transition);
}

.toc-list a::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--manual-accent);
  opacity: 0.5;
  transition: opacity var(--manual-transition);
}

.toc-list a:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--manual-accent);
}

.toc-list a:hover::before {
  opacity: 1;
}

/* ── related links ── */

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  border: 1px solid var(--manual-border);
  border-radius: var(--manual-radius-md);
  background: rgba(7, 13, 24, 0.38);
  text-decoration: none;
  transition: transform var(--manual-transition), border-color var(--manual-transition), background var(--manual-transition);
}

.related-card:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.35);
  background: rgba(10, 18, 32, 0.6);
}

.related-card .related-label {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--manual-accent);
}

.related-card .related-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--manual-text);
}

.related-card .related-desc {
  font-size: 0.8rem;
  color: var(--manual-text-muted);
  line-height: 1.55;
}

/* ── responsive ── */

@media (max-width: 640px) {
  .manual-hero,
  .manual-section {
    padding: 24px 20px;
    border-radius: 22px;
  }

  .download-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }
}