:root {
  --bg: #06080f;
  --surface: #0f1420;
  --border: rgba(148, 163, 184, 0.18);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #a78bfa;
  --accent-2: #2dd4bf;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--accent); }

.hero {
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(167, 139, 250, 0.25), transparent),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(45, 212, 191, 0.12), transparent),
    var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 4rem 1.5rem 3rem;
}

.hero-inner { max-width: 880px; margin: 0 auto; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--accent-2);
  font-weight: 700;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  margin: 0.25rem 0 1rem;
  background: linear-gradient(135deg, #fff 0%, #c4b5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.lead { font-size: 1.125rem; color: var(--muted); max-width: 640px; }

.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.5rem; }

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.1rem;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.9rem;
}

.btn-primary {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
}

.btn-secondary {
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

section { margin-bottom: 3rem; }

h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #f8fafc;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.grid > * { min-width: 0; }

:not(pre) > code { overflow-wrap: anywhere; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}

.card h3 { margin: 0 0 0.5rem; font-size: 1rem; color: #c4b5fd; }
.card p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.card-highlight {
  border-color: rgba(167, 139, 250, 0.35);
  background: rgba(99, 102, 241, 0.06);
}

.card-highlight pre {
  margin: 0.75rem 0;
  padding: 0.75rem;
  font-size: 0.78rem;
}

.doc-list {
  color: var(--muted);
  line-height: 1.8;
  padding-left: 1.25rem;
}

.doc-list code {
  background: rgba(99, 102, 241, 0.15);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85rem;
}

/* Shared nav (docs + site) */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: rgba(6, 8, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  font-weight: 800;
  font-size: 1.1rem;
  color: #f8fafc;
  text-decoration: none;
}

.nav-links { display: flex; align-items: center; gap: 1.25rem; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 0.875rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); }

/* Mobile nav toggle (CSS-only hamburger) */
.nav-toggle { display: none; }

.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  padding: 9px 8px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.nav-burger span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.hero-compact { padding: 2.5rem 1.5rem 2rem; }

.section-lead { color: var(--muted); margin: 0 0 1rem; }

.guide-step {
  margin: 1.75rem 0 0.85rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 1.15rem;
  color: #c4b5fd;
}

.guide-substep {
  margin: 1.25rem 0 0.5rem;
  font-size: 0.95rem;
  color: var(--text);
}

.guide-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1.5rem;
  padding: 0.85rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.guide-toc a {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}

.guide-toc a:hover { color: var(--text); border-color: var(--accent); }

.callout {
  margin: 1rem 0;
  padding: 0.9rem 1.1rem;
  border-radius: 10px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--muted);
  border: 1px solid var(--border);
  background: var(--surface);
}

.callout strong { color: var(--text); }

.callout-warn {
  border-color: rgba(251, 191, 36, 0.35);
  background: rgba(251, 191, 36, 0.07);
}

.grid-3 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

.card-highlight .btn {
  margin-top: 0.75rem;
  font-size: 0.85rem;
}

pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
}

code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.85rem; }

.footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}

/* Tablet + collapsed nav */
@media (max-width: 860px) {
  .nav { flex-wrap: wrap; row-gap: 0.5rem; }

  .nav-burger { display: flex; }

  .nav-links {
    display: none;
    order: 3;
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
    width: 100%;
    margin-top: 0.5rem;
  }

  .nav-toggle:checked ~ .nav-links { display: flex; }

  .nav-links a {
    display: block;
    padding: 0.7rem 0.6rem;
    font-size: 0.95rem;
    border-radius: 9px;
  }

  .nav-links a:hover { background: rgba(148, 163, 184, 0.08); }

  .nav-toggle:checked ~ .nav-burger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav-toggle:checked ~ .nav-burger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .nav-burger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}

/* Phone */
@media (max-width: 640px) {
  .hero { padding: 3rem 1.15rem 2.5rem; }
  .hero-compact { padding: 2.25rem 1.15rem 1.75rem; }
  .container { padding: 2rem 1.15rem 3rem; }

  .hero-actions { width: 100%; }
  .hero-actions .btn { flex: 1 1 auto; justify-content: center; }

  .guide-toc { padding: 0.75rem 0.85rem; }
}