:root {
  --foam: #eaf7fb;
  --sky: #7fc6e6;
  --cobalt: #2e7cc0;
  --navy: #123a6b;
  --calcadao: var(--navy);
  --pedra: var(--foam);
  --papel: #ffffff;
  --muted: #3c617b;
  --mate: var(--sky);
  --mar: var(--navy);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--pedra);
  color: var(--calcadao);
  font-family: "Onest", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.65;
}

.top {
  background: linear-gradient(110deg, #0b294f, var(--navy));
  padding: 14px 20px;
}

.back {
  color: var(--foam);
  font-weight: 700;
  text-decoration: none;
}

.back:hover,
.back:focus-visible {
  text-decoration: underline;
}

main {
  max-width: 720px;
  margin: 28px auto 48px;
  padding: clamp(24px, 5vw, 48px);
  background: var(--papel);
  border: 1px solid #b8d5e5;
  border-radius: 20px;
  box-shadow: 0 24px 60px -48px #123a6b;
}

h1 {
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  line-height: 1.15;
  margin: 0 0 4px;
}

h2 {
  font-size: 1.25rem;
  margin: 2rem 0 0.5rem;
}

.updated {
  color: var(--muted);
  margin: 0 0 1.5rem;
}

ul,
ol {
  padding-left: 1.25rem;
}

li {
  margin: 0.35rem 0;
}

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

a:focus-visible {
  outline: 3px solid var(--mar);
  outline-offset: 2px;
}

.foot {
  border-top: 1px solid #b8d5e5;
  padding: 20px;
  text-align: center;
}
@media (max-width: 760px) {
  main { margin: 12px 12px 32px; border-radius: 14px; }
}

.foot a {
  color: var(--muted);
  text-decoration: none;
}