/* The app's own palette: a night sea, sonar green, and gold for treasure. */
:root {
  --sea-top: #0f6180;
  --sea: #05142f;
  --abyss: #02081a;
  --foam: #ccf5ff;
  --foam-soft: #9cc4d1;
  --foam-faint: #5f8796;
  --rule: rgba(204, 245, 255, 0.14);
  --sonar: #5cfadb;
  --gold: #ffd661;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 0 24px 64px;
  min-height: 100vh;
  background: linear-gradient(var(--sea-top), var(--sea) 40%, var(--abyss)) fixed;
  color: var(--foam);
  font: 17px/1.6 ui-rounded, "SF Pro Rounded", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}
main { max-width: 34rem; margin: 0 auto; }
header { text-align: center; padding: 56px 0 8px; }
h1 {
  font-size: 2.8rem; margin: 0; letter-spacing: 0.06em; font-weight: 900;
  color: var(--sonar); text-shadow: 0 0 18px rgba(92, 250, 219, 0.45);
}
hr { border: 0; border-top: 1px solid var(--rule); margin: 18px auto; width: 8rem; }
.tagline { color: var(--foam-soft); margin: 0; }
h2 { font-size: 1.2rem; margin: 40px 0 8px; color: var(--foam); }
p, li { margin: 0 0 14px; color: var(--foam-soft); }
strong { color: var(--foam); }
a { color: var(--sonar); }
.rule {
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--rule);
  border-radius: 16px; padding: 18px 20px; margin: 24px 0;
}
.rule p { margin: 0; }
.gold { color: var(--gold); }
.small { font-size: 13px; color: var(--foam-faint); }
footer {
  margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--rule);
  font-size: 13px; color: var(--foam-faint);
}
footer a { margin-right: 14px; }