:root {
  --canvas: #f7f8fa;
  --surface: #ffffff;
  --ink: #101828;
  --muted: #475467;
  --faint: #98a2b3;
  --line: #e4e7ec;
  --navy: #1d4ed8;
  --navy-soft: #dbeafe;
  --max: 720px;
  --font: "SF Pro Text", "Segoe UI", system-ui, -apple-system, sans-serif;
  --display: "SF Pro Display", "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(29, 78, 216, 0.12), transparent 60%),
    var(--canvas);
  line-height: 1.55;
}

a { color: var(--navy); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(247, 248, 250, 0.9);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--display);
  font-weight: 700;
}

.nav-links { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.95rem; }

.hero { padding: 3rem 0 2rem; text-align: center; }

.hero-mark {
  width: 96px;
  height: 96px;
  margin: 0 auto 1.5rem;
  border-radius: 24px;
  background: var(--navy);
  display: grid;
  place-items: center;
  box-shadow: 0 10px 24px rgba(29, 78, 216, 0.25);
}

.hero-mark svg { color: white; }

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

h1 {
  font-family: var(--display);
  font-size: clamp(2rem, 5vw, 2.75rem);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.lede { color: var(--muted); font-size: 1.1rem; max-width: 36rem; margin: 0 auto 1.5rem; }

.cta-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.75rem; }

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.25rem;
  border-radius: 14px;
  font-weight: 600;
  text-decoration: none;
}

.btn-primary { background: var(--navy); color: white; }
.btn-ghost { background: var(--surface); border: 1px solid var(--line); color: var(--ink); }

.grid.features {
  display: grid;
  gap: 1rem;
  padding-bottom: 3rem;
}

@media (min-width: 640px) {
  .grid.features { grid-template-columns: repeat(3, 1fr); }
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1.25rem;
}

.card h3 { margin: 0 0 0.5rem; font-family: var(--display); }

.page { padding: 2rem 0 3rem; }

.page h1 { text-align: left; margin-bottom: 0.25rem; }

.meta { color: var(--faint); font-size: 0.9rem; margin-bottom: 2rem; }

.prose h2 { font-family: var(--display); margin-top: 2rem; }
.prose ul { padding-left: 1.25rem; }
.prose li { margin-bottom: 0.35rem; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2rem;
  color: var(--faint);
  font-size: 0.875rem;
  text-align: center;
}