/* ── Variables ─────────────────────────────────────── */
:root {
  --ink:            #1a1a2e;
  --ink-deep:       #0d0d1e;
  --gold:           #c8a96e;
  --parchment:      #f5ede0;
  --parchment-mid:  #ede5d4;
  --parchment-dark: #d4c4a8;
  --muted:          #8a7a6a;
  --muted-dark:     #6b6b8b;
  --serif:          Georgia, 'Times New Roman', serif;
  --sans:           -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ── Reset ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--sans); line-height: 1.6; color: var(--ink); }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; border-radius: 6px; }

/* ── Site Nav ───────────────────────────────────────── */
.site-nav {
  position: absolute; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 48px;
}
.nav-logo {
  display: flex; align-items: center; gap: 8px;
  color: var(--gold); font-size: 13px; font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase;
}
.nav-logomark { flex-shrink: 0; display: block; }
.nav-links { display: flex; gap: 28px; }
.nav-link { color: var(--muted-dark); font-size: 13px; transition: color 0.2s; }
.nav-link:hover, .nav-link.active { color: var(--gold); }
body:not(.has-hero) .site-nav {
  position: static; background: var(--ink); padding: 14px 48px;
}

/* ── Hero ────────────────────────────────────────────── */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 120px 24px 80px;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('../img/hero-library.jpg') center/cover no-repeat;
  filter: brightness(0.18) sepia(0.2); z-index: 0;
}
.hero::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, var(--ink-deep) 100%);
  z-index: 1;
}
.hero-content { position: relative; z-index: 2; max-width: 680px; }
.hero-logo { margin-bottom: 20px; }
.hero-logo svg { margin: 0 auto; filter: drop-shadow(0 2px 12px rgba(122,176,204,0.3)); }
.hero-eyebrow {
  color: var(--gold); font-size: 10px; font-weight: 700;
  letter-spacing: 4px; text-transform: uppercase; margin-bottom: 20px;
}
.hero-title {
  color: var(--parchment); font-family: var(--serif);
  font-size: clamp(36px, 6vw, 56px); font-weight: 700;
  line-height: 1.15; margin-bottom: 20px;
}
.hero-sub {
  color: var(--muted-dark); font-size: 16px; line-height: 1.7;
  margin-bottom: 36px; max-width: 520px; margin-left: auto; margin-right: auto;
}
.hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  background: var(--gold); color: var(--ink-deep);
  padding: 13px 32px; border-radius: 5px; font-weight: 700; font-size: 14px;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.88; }
.btn-ghost {
  border: 1px solid #3a3a5e; color: var(--muted-dark);
  padding: 13px 32px; border-radius: 5px; font-size: 14px;
  transition: border-color 0.2s, color 0.2s;
}
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }

/* ── Stats Strip ──────────────────────────────────────── */
.stats-strip {
  background: var(--ink-deep); display: flex;
  justify-content: center; gap: 56px; padding: 24px; flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-num {
  display: block; color: var(--gold);
  font-family: var(--serif); font-size: 22px; font-weight: 700;
}
.stat-label {
  display: block; color: #4a4a6a;
  font-size: 10px; text-transform: uppercase; letter-spacing: 1px; margin-top: 2px;
}

/* ── Features ─────────────────────────────────────────── */
.features { background: var(--parchment); padding: 80px 48px; }
.features-header { text-align: center; margin-bottom: 64px; }
.features-header h2 {
  font-family: var(--serif); font-size: 32px;
  color: var(--ink); margin-bottom: 8px;
}
.features-header p { color: var(--muted); font-size: 16px; }
.feature-row {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
  max-width: 1000px; margin: 0 auto 72px;
}
.feature-row.reverse { direction: rtl; }
.feature-row.reverse > * { direction: ltr; }
.feature-icon { font-size: 28px; margin-bottom: 12px; }
.feature-text h3 {
  font-family: var(--serif); font-size: 22px;
  color: var(--ink); margin-bottom: 12px;
}
.feature-text p { color: var(--muted); font-size: 15px; line-height: 1.7; }
.feature-shot img {
  border: 1px solid var(--parchment-dark);
  box-shadow: 0 4px 24px rgba(26,26,46,.12);
}

/* ── Blog Preview ─────────────────────────────────────── */
.blog-preview { background: var(--parchment-mid); padding: 72px 48px; text-align: center; }
.blog-preview h2 {
  font-family: var(--serif); font-size: 28px;
  color: var(--ink); margin-bottom: 32px;
}
.blog-cards {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 20px; max-width: 960px; margin: 0 auto 32px; text-align: left;
}
.blog-card {
  background: var(--parchment); border: 1px solid var(--parchment-dark);
  border-radius: 8px; padding: 22px 20px; display: block;
  transition: box-shadow 0.2s;
}
.blog-card:hover { box-shadow: 0 4px 16px rgba(26,26,46,.1); }
.card-date { display: block; color: var(--gold); font-size: 11px; letter-spacing: 1px; margin-bottom: 6px; }
.blog-card h3 {
  font-family: var(--serif); font-size: 16px;
  color: var(--ink); margin-bottom: 8px; line-height: 1.3;
}
.blog-card p { color: var(--muted); font-size: 12px; line-height: 1.7; }
.card-tag {
  display: inline-block; margin-top: 10px;
  background: var(--parchment-mid); border: 1px solid var(--parchment-dark);
  color: var(--gold); font-size: 10px; letter-spacing: 1px;
  padding: 2px 10px; border-radius: 12px;
}
.read-all {
  color: var(--gold); font-size: 14px;
  border-bottom: 1px solid var(--parchment-dark); padding-bottom: 2px;
}
.read-all:hover { border-color: var(--gold); }

/* ── Footer ───────────────────────────────────────────── */
.site-footer { background: var(--ink); padding: 28px 48px; }
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1100px; margin: 0 auto;
}
.footer-logo {
  color: var(--gold); font-size: 12px; font-weight: 700;
  letter-spacing: 3px; text-transform: uppercase;
}
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--muted-dark); font-size: 13px; }
.footer-links a:hover { color: var(--gold); }
.footer-tagline { color: #3a3a5e; font-size: 12px; font-style: italic; }

/* ── Doc Layout ───────────────────────────────────────── */
.doc-shell { display: flex; min-height: calc(100vh - 56px); }
.doc-sidebar {
  width: 220px; flex-shrink: 0; background: #080810;
  border-right: 1px solid #1a1a2e; padding: 28px 0;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.sidebar-brand { padding: 0 20px 20px; }
.sidebar-brand a { color: var(--muted-dark); font-size: 12px; }
.sidebar-brand a:hover { color: var(--gold); }
.sidebar-section { margin-bottom: 20px; }
.sidebar-label {
  padding: 0 20px; color: #4a4a6a; font-size: 9px;
  font-weight: 700; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 6px;
}
.sidebar-link { display: block; padding: 6px 20px; color: var(--muted-dark); font-size: 13px; transition: color 0.2s; }
.sidebar-link:hover { color: var(--gold); }
.sidebar-link.active {
  color: var(--gold); background: #1a1a2e; border-left: 2px solid var(--gold);
}
.doc-content {
  flex: 1; background: var(--parchment); padding: 40px 56px; max-width: 860px;
}
.breadcrumb { font-size: 12px; color: var(--muted); margin-bottom: 28px; }
.breadcrumb a { color: var(--gold); }
.doc-content h1 {
  font-family: var(--serif); font-size: 32px; color: var(--ink);
  margin-bottom: 16px; border-bottom: 1px solid var(--parchment-dark); padding-bottom: 16px;
}
.doc-content h2 { font-family: var(--serif); font-size: 20px; color: var(--gold); margin: 32px 0 12px; }
.doc-content h3 { font-size: 15px; font-weight: 600; color: var(--ink); margin: 24px 0 8px; }
.doc-content p { color: var(--muted); font-size: 15px; line-height: 1.8; margin-bottom: 16px; }
.doc-content strong { color: var(--ink); font-weight: 600; }
.doc-content a { color: var(--gold); border-bottom: 1px solid var(--parchment-dark); }
.doc-content a:hover { border-color: var(--gold); }
.doc-content code {
  background: var(--parchment-mid); border: 1px solid var(--parchment-dark);
  border-radius: 3px; padding: 1px 5px; font-size: 13px; color: #5a3a1a;
}
.doc-content pre {
  background: var(--ink); border-radius: 8px; padding: 20px;
  overflow-x: auto; margin: 20px 0;
}
.doc-content pre code { background: none; border: none; color: var(--parchment); font-size: 13px; padding: 0; }
.doc-content blockquote {
  border-left: 3px solid var(--gold); background: var(--parchment-mid);
  padding: 12px 16px; border-radius: 0 6px 6px 0; margin: 20px 0;
}
.doc-content blockquote p { margin-bottom: 0; color: var(--ink); font-size: 14px; }
.doc-content img {
  border: 1px solid var(--parchment-dark); border-radius: 8px;
  margin: 20px 0; box-shadow: 0 2px 12px rgba(26,26,46,.08);
}
.doc-content em { color: var(--muted); font-style: italic; font-size: 13px; }
.doc-content table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }
.doc-content th {
  background: var(--parchment-mid); color: var(--ink); font-weight: 600;
  padding: 10px 14px; text-align: left; border-bottom: 2px solid var(--parchment-dark);
}
.doc-content td { padding: 8px 14px; border-bottom: 1px solid var(--parchment-dark); color: var(--muted); }
.doc-content tr:hover td { background: var(--parchment-mid); }
.doc-content ul, .doc-content ol { color: var(--muted); font-size: 15px; line-height: 1.8; margin-bottom: 16px; padding-left: 24px; }
.doc-content li { margin-bottom: 4px; }

/* ── Post / Blog Layout ───────────────────────────────── */
.post-shell, .blog-shell { display: flex; min-height: calc(100vh - 56px); }
.post-sidebar {
  width: 220px; flex-shrink: 0; background: #080810;
  border-right: 1px solid #1a1a2e; padding: 28px 0;
}
.post-content, .blog-list {
  flex: 1; background: var(--parchment); padding: 48px 64px; max-width: 820px;
}
.post-header { margin-bottom: 40px; border-bottom: 1px solid var(--parchment-dark); padding-bottom: 24px; }
.post-date { color: var(--gold); font-size: 12px; letter-spacing: 1px; display: block; margin-bottom: 10px; }
.post-header h1 { font-family: var(--serif); font-size: 36px; color: var(--ink); line-height: 1.2; margin-bottom: 14px; }
.post-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag { background: var(--parchment-mid); border: 1px solid var(--parchment-dark); color: var(--gold); font-size: 11px; padding: 3px 10px; border-radius: 12px; }
.post-content p { color: var(--muted); font-size: 16px; line-height: 1.85; margin-bottom: 20px; }
.post-content h2 { font-family: var(--serif); font-size: 22px; color: var(--gold); margin: 36px 0 14px; }
.post-content h3 { font-size: 16px; font-weight: 600; color: var(--ink); margin: 24px 0 10px; }
.post-content strong { color: var(--ink); }
.post-content a { color: var(--gold); border-bottom: 1px solid var(--parchment-dark); }
.post-content a:hover { border-color: var(--gold); }
.post-content code { background: var(--parchment-mid); border: 1px solid var(--parchment-dark); border-radius: 3px; padding: 1px 5px; font-size: 13px; color: #5a3a1a; }
.post-content pre { background: var(--ink); border-radius: 8px; padding: 20px; overflow-x: auto; margin: 24px 0; }
.post-content pre code { background: none; border: none; color: var(--parchment); font-size: 13px; padding: 0; }
.post-content blockquote { border-left: 3px solid var(--gold); background: var(--parchment-mid); padding: 12px 16px; border-radius: 0 6px 6px 0; margin: 24px 0; }
.post-content blockquote p { margin-bottom: 0; color: var(--ink); font-size: 14px; }
.post-content img { border: 1px solid var(--parchment-dark); border-radius: 8px; margin: 20px 0; box-shadow: 0 2px 12px rgba(26,26,46,.08); }
.post-content ul, .post-content ol { color: var(--muted); font-size: 16px; line-height: 1.85; margin-bottom: 20px; padding-left: 24px; }
.post-content li { margin-bottom: 6px; }
.blog-list h1 { font-family: var(--serif); font-size: 32px; color: var(--ink); margin-bottom: 8px; }
.blog-intro { color: var(--muted); margin-bottom: 36px; font-size: 15px; }
.blog-list .blog-cards { display: flex; flex-direction: column; gap: 20px; }
.blog-list .blog-card { max-width: 640px; }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 900px) {
  .site-nav, body:not(.has-hero) .site-nav { padding: 14px 20px; }
  .features { padding: 48px 20px; }
  .feature-row { grid-template-columns: 1fr; gap: 32px; }
  .feature-row.reverse { direction: ltr; }
  .blog-cards { grid-template-columns: 1fr; }
  .blog-preview, .stats-strip { padding: 40px 20px; gap: 24px; }
  .doc-sidebar, .post-sidebar { display: none; }
  .doc-content, .post-content, .blog-list { padding: 24px 20px; max-width: 100%; }
  .site-footer { padding: 24px 20px; }
  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
}