:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #526079;
  --navy: #172554;
  --blue: #0369a1;
  --sky: #e0f2fe;
  --paper: #ffffff;
  --wash: #f5f8fc;
  --line: #dbe3ef;
  --focus: #f59e0b;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-size: 17px;
  line-height: 1.65;
}

a { color: var(--blue); text-underline-offset: 0.16em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, .button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 10;
  padding: .65rem 1rem;
  background: #fff;
  color: var(--navy);
}
.skip-link:focus { left: 1rem; top: 1rem; }

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.96);
}

.nav,
.wrap {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  color: var(--navy);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -.02em;
}

.brand img { width: 40px; height: 40px; }

.nav-links { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-weight: 650; text-decoration: none; }
.nav-links a:hover { color: var(--navy); }

.hero {
  padding: 6.5rem 0 5.5rem;
  background:
    radial-gradient(circle at 80% 15%, rgba(14,165,233,.18), transparent 30rem),
    linear-gradient(180deg, #f8fbff 0%, #fff 100%);
}

.eyebrow {
  margin: 0 0 .5rem;
  color: var(--blue);
  font-size: .8rem;
  font-weight: 850;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1, h2, h3 { color: var(--navy); line-height: 1.15; }
h1 { max-width: 780px; margin: 0; font-size: clamp(2.6rem, 7vw, 5.3rem); letter-spacing: -.055em; }
h2 { margin: 0 0 1rem; font-size: clamp(1.8rem, 4vw, 2.8rem); letter-spacing: -.035em; }
h3 { margin: 0 0 .5rem; font-size: 1.2rem; }

.lead { max-width: 720px; margin: 1.5rem 0 0; color: var(--muted); font-size: 1.25rem; }

.hero-note {
  display: inline-flex;
  margin-top: 1.75rem;
  padding: .65rem .9rem;
  border: 1px solid #bae6fd;
  border-radius: 999px;
  background: var(--sky);
  color: #0c4a6e;
  font-size: .94rem;
  font-weight: 700;
}

.section { padding: 4.75rem 0; }
.section.alt { background: var(--wash); border-block: 1px solid var(--line); }
.section-intro { max-width: 700px; color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.card {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 12px 35px rgba(23,37,84,.06);
}
.card p { margin: .45rem 0 0; color: var(--muted); }
.number {
  display: grid;
  width: 2.2rem;
  height: 2.2rem;
  margin-bottom: 1rem;
  place-items: center;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  font-weight: 800;
}

.callout {
  padding: 1.4rem 1.5rem;
  border-left: 5px solid var(--blue);
  border-radius: 0 12px 12px 0;
  background: var(--sky);
}
.callout p { margin: 0; }

.prose { width: min(780px, 100%); }
.prose h1 { font-size: clamp(2.4rem, 6vw, 4rem); }
.prose h2 { margin-top: 2.6rem; font-size: 1.65rem; }
.prose h3 { margin-top: 1.8rem; }
.prose li + li { margin-top: .45rem; }
.meta { margin-top: .75rem; color: var(--muted); }

.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .92rem;
}
.footer-row { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.footer-links { display: flex; gap: 1rem; flex-wrap: wrap; }

code { padding: .12rem .32rem; border-radius: 5px; background: #eef2f7; font-size: .9em; }

@media (max-width: 760px) {
  .nav { align-items: flex-start; flex-direction: column; padding-block: 1rem; }
  .hero { padding: 4.2rem 0; }
  .grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}