:root {
  --abyss: #051824;
  --teal: #00606c;
  --lime: #beff3c;
  --foam: #e4f3f0;
  --mist: #a8ded6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(ellipse at top, var(--teal) 0%, var(--abyss) 60%) fixed, var(--abyss);
  color: var(--foam);
  font: 18px/1.6 "Helvetica Neue", Arial, sans-serif;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3rem 1.25rem 2rem;
}

h1, h2 {
  color: #fff;
  font-family: Impact, "Anton", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1 { font-size: 2.6rem; line-height: 1.1; margin: 0.75rem 0 0.25rem; }
h2 { font-size: 1.4rem; margin-top: 2.5rem; }
.accent { color: var(--lime); }
.tagline { color: var(--mist); font-weight: 700; margin-top: 0; }
.avatar { border-radius: 50%; display: block; }
a { color: var(--lime); }
code { color: var(--mist); }

.button {
  display: inline-block;
  background: var(--lime);
  color: var(--abyss);
  font-weight: 800;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  text-decoration: none;
}

.platform-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

footer {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
  font-size: 0.9rem;
}