:root {
  --ink: #0b1321;
  --ink-raised: #131d2e;
  --cream: #fff8e6;
  --cream-dim: rgba(255, 248, 230, 0.62);
  --mint: #59d6b3;
  --hairline: rgba(255, 248, 230, 0.13);
}

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

body {
  background: linear-gradient(160deg, var(--ink-raised), var(--ink));
  color: var(--cream);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  line-height: 1.9;
  min-height: 100vh;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 22px 80px;
}

.brand {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--mint);
}

.brand a { color: inherit; text-decoration: none; }

h1 {
  font-size: 30px;
  font-weight: 900;
  margin: 6px 0 4px;
}

.updated {
  font-size: 12px;
  color: var(--cream-dim);
  margin-bottom: 34px;
}

h2 {
  font-size: 18px;
  font-weight: 800;
  margin: 34px 0 10px;
  padding-top: 22px;
  border-top: 1px solid var(--hairline);
}

p, li { font-size: 15px; color: rgba(255, 248, 230, 0.88); }

ul, ol { padding-left: 1.4em; }

li { margin: 4px 0; }

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

.card {
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--hairline);
  border-radius: 18px;
  padding: 18px 20px;
  margin: 14px 0;
}

footer {
  border-top: 1px solid var(--hairline);
  margin-top: 48px;
  padding-top: 18px;
  font-size: 12px;
  color: var(--cream-dim);
}

footer nav a { margin-right: 16px; }