@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Syne:wght@400;600;700;800&display=swap');

:root {
  --bg:       #0e1117;
  --surface:  #161b27;
  --surface2: #1e2535;
  --border:   #2a3348;
  --accent:   #4ade80;
  --accent2:  #38bdf8;
  --muted:    #4b5675;
  --text:     #e2e8f0;
  --text-dim: #8892aa;
  --error:    #f87171;
  --radius:   8px;
  --mono:     'JetBrains Mono', monospace;
  --sans:     'Syne', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── HEADER ── */
.page-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 10;
}
.page-logo {
  font-size: 16px;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.4px;
}
.page-logo span { color: var(--accent); }

.page-nav { display: flex; gap: 6px; align-items: center; }
.page-nav a {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  text-decoration: none;
  padding: 5px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface2);
  transition: color .15s, border-color .15s;
}
.page-nav a:hover { color: var(--accent); border-color: var(--accent); }
.page-nav a.active { color: var(--accent); border-color: var(--accent); }

/* ── MAIN CONTENT ── */
main {
  flex: 1;
  max-width: 780px;
  width: 100%;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.page-hero {
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 10px;
}
.page-hero h1 span { color: var(--accent); }
.page-hero p {
  font-size: 15px;
  color: var(--text-dim);
  max-width: 560px;
}
.page-updated {
  display: inline-block;
  margin-top: 10px;
  font-size: 11px;
  font-family: var(--mono);
  color: var(--muted);
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 20px;
}

/* ── SECTIONS ── */
.page-section {
  margin-bottom: 40px;
}
.page-section h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  letter-spacing: -0.3px;
}
.page-section h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent2);
  margin: 20px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.page-section p {
  color: var(--text-dim);
  margin-bottom: 12px;
  font-size: 14px;
}
.page-section p:last-child { margin-bottom: 0; }
.page-section ul, .page-section ol {
  color: var(--text-dim);
  padding-left: 20px;
  font-size: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}
.page-section a { color: var(--accent); text-decoration: none; }
.page-section a:hover { text-decoration: underline; }

/* ── FAQ ITEMS ── */
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--surface);
}
.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  padding: 16px 20px;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background .15s;
}
.faq-question:hover { background: var(--surface2); }
.faq-question .faq-icon {
  font-size: 18px;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform .2s;
  line-height: 1;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  display: none;
  padding: 0 20px 16px;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.7;
  border-top: 1px solid var(--border);
}
.faq-item.open .faq-answer { display: block; padding-top: 14px; }

/* ── HIGHLIGHT BOX ── */
.highlight-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 20px 0;
  font-size: 13px;
  color: var(--text-dim);
}
.highlight-box strong { color: var(--accent); }

/* ── FOOTER ── */
.page-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
  flex-shrink: 0;
}
.page-footer a { color: var(--text-dim); text-decoration: none; }
.page-footer a:hover { color: var(--accent); }
.page-footer-links { display: flex; gap: 16px; flex-wrap: wrap; }

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .page-header { padding: 0 16px; }
  .page-nav a { font-size: 11px; padding: 4px 9px; }
  main { padding: 28px 16px 48px; }
  .page-hero h1 { font-size: 24px; }
  .page-footer { flex-direction: column; text-align: center; padding: 16px; }
  .page-footer-links { justify-content: center; }
}