:root {
  --bg: #f8f8f8;
  --text: #222222;
  --muted: #6f6f6f;
  --border: #e3e3e3;
  --highlight: #fff083;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f0f;
    --text: #f2f2f2;
    --muted: #9a9a9a;
    --border: #2b2b2b;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.65 "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.back {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.back:hover {
  color: var(--text);
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(36px, 9vw, 64px);
  font-weight: 600;
  line-height: 0.95;
  letter-spacing: -0.035em;
  text-transform: uppercase;
}

h2 {
  margin: 32px 0 8px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

p,
li {
  color: var(--text);
}

ul {
  padding-left: 20px;
}

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

.todo {
  background: var(--highlight);
  color: #222222;
  padding: 0 4px;
  border-radius: 3px;
}

.notice {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--muted);
}