/* ---------- Design tokens ---------- */
:root {
  --bg: #0b0d12;
  --bg-soft: #11141b;
  --surface: #161a23;
  --border: #232936;
  --text: #e7eaf0;
  --text-dim: #a4abba;
  --brand: #6aa6ff;
  --brand-strong: #4f8fff;
  --accent: #8ef0c1;
  --radius: 14px;
  --maxw: 1100px;
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.35);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.25);
  --ease: cubic-bezier(.2,.7,.2,1);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --bg-soft: #f6f7fb;
    --surface: #ffffff;
    --border: #e6e8ef;
    --text: #0b0d12;
    --text-dim: #5a6072;
    --brand: #2563eb;
    --brand-strong: #1d4ed8;
    --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.08);
  }
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
               Inter, system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(106,166,255,0.12), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(142,240,193,0.08), transparent 60%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-strong); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 720px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(140%) blur(10px);
  background: color-mix(in oklab, var(--bg) 75%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-row {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); }
.brand:hover { color: var(--text); }
.brand-name { font-weight: 700; letter-spacing: -0.01em; }
.logo {
  width: 28px; height: 28px; border-radius: 6px;
  display: block;
  box-shadow: var(--shadow-sm);
}
.nav-links { display: flex; gap: 22px; }
.nav-links a { color: var(--text-dim); font-size: 0.95rem; }
.nav-links a:hover { color: var(--text); }

@media (max-width: 640px) {
  .nav-links { display: none; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 18px; border-radius: 999px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .15s var(--ease), background .15s var(--ease),
              border-color .15s var(--ease), color .15s var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 8px 14px; font-size: 0.92rem; }
.btn-lg { padding: 14px 22px; font-size: 1.02rem; }

.btn-primary {
  background: var(--brand); color: white;
}
.btn-primary:hover { background: var(--brand-strong); color: white; }

.btn-ghost {
  background: transparent; color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--text-dim); color: var(--text); }

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 72px;
  text-align: center;
  position: relative;
}
.hero-inner { max-width: 760px; margin: 0 auto; }
.eyebrow {
  display: inline-block;
  font-size: 0.85rem; color: var(--text-dim);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 999px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.07;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  font-weight: 800;
}
.lede {
  color: var(--text-dim);
  font-size: 1.15rem;
  margin: 0 auto 28px;
  max-width: 620px;
}
.hero-actions {
  display: flex; gap: 12px; justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.hero-meta { color: var(--text-dim); font-size: 0.9rem; margin: 8px 0 0; }

/* ---------- Sections ---------- */
.section { padding: 80px 0; }
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.01em;
  text-align: center;
  margin: 0 0 8px;
  font-weight: 800;
}
.section-sub {
  color: var(--text-dim); text-align: center;
  margin: 0 0 40px;
}

/* ---------- Cards / grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
@media (max-width: 800px) {
  .grid { grid-template-columns: 1fr; }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}
.card:hover { transform: translateY(-2px); border-color: color-mix(in oklab, var(--brand) 40%, var(--border)); }
.card h3 { margin: 8px 0 6px; font-size: 1.1rem; }
.card p { color: var(--text-dim); margin: 0; }
.card-icon {
  width: 36px; height: 36px; border-radius: 10px;
  display: grid; place-items: center;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  font-size: 1.1rem;
}

/* CTA */
.cta {
  padding: 88px 0;
  text-align: center;
  background:
    radial-gradient(800px 300px at 50% 0%, rgba(106,166,255,0.18), transparent 60%),
    var(--bg);
  border-top: 1px solid var(--border);
}
.cta h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 8px; letter-spacing: -0.01em;
}
.cta p { color: var(--text-dim); margin: 0 0 24px; }

/* Footer */
.footer { padding: 32px 0; border-top: 1px solid var(--border); }
.footer-row { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--text-dim); font-size: 0.9rem; }
.muted { color: var(--text-dim); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}