:root {
  --blue: #2489bf;
  --navy: #0f2740;
  --navy-2: #175882;
  --ice: #eaf6ff;
  --teal: #53dbc6;
  --sky: #7cc2e6;
  --text: #22313f;
  --muted: #5d707f;
  --card: #ffffff;
  --border: #d6e8f5;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--ice);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

header.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 55%, var(--blue) 100%);
  color: #fff;
  padding: 3.5rem 1.5rem 3rem;
  text-align: center;
}

.hero .brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .02em;
  color: var(--sky);
  text-decoration: none;
}

.hero h1 {
  margin-top: 1.1rem;
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -.01em;
}

.hero p.sub {
  margin-top: .6rem;
  color: #cfe7f7;
  font-size: .98rem;
}

main {
  max-width: 760px;
  margin: -1.6rem auto 0;
  padding: 0 1.25rem 4rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.2rem clamp(1.25rem, 4vw, 2.6rem);
  box-shadow: 0 10px 30px rgba(15, 39, 64, .08);
}

.card > p.lead {
  color: var(--muted);
  font-size: .95rem;
  margin-bottom: 1.6rem;
}

h2 {
  color: var(--navy);
  font-size: 1.22rem;
  margin: 2.1rem 0 .6rem;
  padding-top: .4rem;
  letter-spacing: -.01em;
}

h2:first-of-type { margin-top: .4rem; }

h3 {
  color: var(--navy-2);
  font-size: 1.02rem;
  margin: 1.4rem 0 .4rem;
}

p, li { font-size: .97rem; }
p + p { margin-top: .7rem; }

ul, ol { margin: .5rem 0 .9rem 1.3rem; }
li { margin: .3rem 0; }

a { color: var(--blue); }

strong { color: var(--navy); }

table {
  width: 100%;
  border-collapse: collapse;
  margin: .9rem 0 1.1rem;
  font-size: .92rem;
}

th, td {
  text-align: left;
  padding: .55rem .7rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  background: var(--ice);
  color: var(--navy);
  font-weight: 600;
}

.table-wrap { overflow-x: auto; }

.callout {
  background: var(--ice);
  border-left: 4px solid var(--teal);
  border-radius: 0 10px 10px 0;
  padding: .85rem 1.1rem;
  margin: 1rem 0;
  font-size: .94rem;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: .88rem;
  padding: 0 1.5rem 3rem;
}

footer a { color: var(--navy-2); }

@media (max-width: 480px) {
  header.hero { padding: 2.5rem 1.25rem 2.4rem; }
  .card { padding: 1.6rem 1.15rem; }
}