:root {
  --bg: #0f172a;
  --card: #1e293b;
  --accent: #4f46e5;
  --accent-soft: rgba(79, 70, 229, 0.12);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --shadow: 0 10px 40px rgba(0,0,0,0.25);
  --radius: 14px;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(79,70,229,0.12), transparent 35%),
              radial-gradient(circle at 80% 0%, rgba(14,165,233,0.12), transparent 30%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.dark body { background: #0b1224; }

.hero {
  padding: 48px clamp(20px, 4vw, 64px) 32px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero__top {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: space-between;
}

.brand {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.5px;
}

.nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  padding: 8px 10px;
  border-radius: 10px;
}

.nav a:hover, .nav a:focus {
  color: var(--text);
  background: var(--card);
  outline: none;
}

.actions { display: flex; gap: 8px; align-items: center; }

.chip {
  background: var(--card);
  color: var(--text);
  border: 1px solid rgba(226,232,240,0.12);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.chip[aria-pressed="true"] { border-color: var(--accent); }
.chip:hover { transform: translateY(-1px); }

.hero__content {
  margin-top: 36px;
  max-width: 780px;
  display: none;
}

.hero__content.active { display: block; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 1.4px;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 8px;
}

h1 { font-size: clamp(2rem, 4vw, 3.2rem); margin: 0 0 14px; }
h2 { font-size: clamp(1.4rem, 3vw, 2.1rem); margin: 0 0 10px; }
h3 { margin: 0 0 6px; }

.lede { color: var(--muted); font-size: 1.05rem; margin-bottom: 16px; }

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 12px;
  color: white;
  background: linear-gradient(120deg, var(--accent), #22d3ee);
  text-decoration: none;
  font-weight: 700;
  box-shadow: var(--shadow);
}

.btn.ghost {
  background: rgba(79, 70, 229, 0.08);
  color: var(--text);
  box-shadow: none;
}

.main {
  display: block;
}

.section {
  padding: 52px clamp(20px, 4vw, 64px);
  max-width: 1200px;
  margin: 0 auto;
}

.section.alt {
  background: rgba(255,255,255,0.02);
  border-radius: var(--radius);
}

.section__content { display: none; }
.section__content.active { display: block; }

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-top: 16px;
}

.grid.two { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.card {
  background: var(--card);
  border: 1px solid rgba(226,232,240,0.08);
  padding: 18px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card ul { padding-left: 18px; margin: 8px 0 0; color: var(--muted); }
.card p { margin: 6px 0 0; color: var(--muted); }

.pill-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill-list li {
  background: var(--accent-soft);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(79,70,229,0.3);
}

.timeline {
  padding-left: 18px;
  color: var(--muted);
}

.code {
  background: #0b1224;
  border: 1px solid rgba(226,232,240,0.08);
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
  font-family: "SFMono-Regular", Consolas, monospace;
  color: #cbd5e1;
}

.note { color: var(--muted); margin-top: 12px; }

.inline-link { color: #a5b4fc; text-decoration: none; font-weight: 600; }
.inline-link:hover, .inline-link:focus { text-decoration: underline; }

.footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px clamp(20px, 4vw, 64px) 48px;
  color: var(--muted);
  display: none;
}

.footer.active { display: block; }

@media (max-width: 768px) {
  .hero__top { align-items: flex-start; }
  .nav { width: 100%; }
  .nav a { padding-left: 0; }
}