:root {
  --bg: #0f1216;
  --panel: #ffffff;
  --ink: #1a1d21;
  --muted: #5b636b;
  --line: #e6e8eb;
  --accent: #10b981;
  --accent-ink: #05261c;
  --maxw: 760px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.62;
  font-size: 17px;
}

header.masthead {
  background: linear-gradient(160deg, #12161b, #0b0e12);
  color: #f4f6f8;
  padding: 40px 22px 34px;
  text-align: center;
}

header.masthead .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

header.masthead h1 {
  margin: 12px 0 4px;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -.01em;
}

header.masthead p {
  margin: 0;
  color: #9aa2ab;
  font-size: 14px;
}

main {
  max-width: var(--maxw);
  margin: -20px auto 0;
  background: var(--panel);
  border-radius: 18px 18px 0 0;
  padding: 30px 26px 48px;
  min-height: 60vh;
}

main .updated {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

h2 {
  font-size: 20px;
  font-weight: 750;
  margin: 34px 0 10px;
  letter-spacing: -.01em;
}

h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 22px 0 6px;
}

p, li { color: #2a2e33; }

a { color: #0a8f6b; text-decoration: none; }
a:hover { text-decoration: underline; }

ul { padding-left: 22px; }
li { margin: 6px 0; }

.callout {
  background: #f4fbf8;
  border: 1px solid #d5efe6;
  border-radius: 12px;
  padding: 14px 16px;
  margin: 18px 0;
  font-size: 15px;
}

.contact {
  margin-top: 34px;
  padding: 18px 18px;
  background: #f7f8f9;
  border-radius: 12px;
  border: 1px solid var(--line);
}

footer {
  max-width: var(--maxw);
  margin: 0 auto;
  background: var(--panel);
  padding: 20px 26px 40px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  border-top: 1px solid var(--line);
}

footer a { color: var(--muted); }

.nav-links { margin-top: 8px; }
.nav-links a { margin: 0 8px; font-weight: 600; }

@media (max-width: 480px) {
  body { font-size: 16px; }
  header.masthead h1 { font-size: 22px; }
  main { padding: 26px 18px 40px; border-radius: 16px 16px 0 0; }
}