:root {
  color-scheme: light;
  --blue: #0b5ed7;
  --ink: #172033;
  --muted: #667085;
  --page: #f2f7ff;
  --card: #ffffff;
  --line: #d9e4f4;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #eaf4ff 0%, #f8fbff 42%, #ffffff 100%);
  color: var(--ink);
  line-height: 1.62;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  padding: 34px 0 24px;
}

.brand {
  color: var(--blue);
  font-weight: 750;
  letter-spacing: 0.01em;
}

h1 {
  margin: 12px 0 10px;
  font-size: clamp(2.3rem, 8vw, 4.6rem);
  line-height: 0.96;
  letter-spacing: -0.03em;
}

h2 {
  margin: 30px 0 10px;
  font-size: 1.25rem;
}

p,
li {
  font-size: 1rem;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: 1.08rem;
}

.card {
  background: color-mix(in srgb, var(--card) 92%, transparent);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: clamp(22px, 5vw, 36px);
  box-shadow: 0 24px 70px rgba(35, 78, 145, 0.12);
}

.meta {
  color: var(--muted);
  font-size: 0.94rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.nav a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 16px;
  background: #ffffffb8;
  font-weight: 650;
}

footer {
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --ink: #f7fbff;
    --muted: #a8b6cb;
    --page: #071426;
    --card: #101c2e;
    --line: #26384f;
  }

  body {
    background: linear-gradient(180deg, #061f55 0%, #071426 52%, #050b14 100%);
  }

  .nav a {
    background: #101c2ecc;
  }
}