:root {
  --bg: #f6f5f3;
  --surface: #ffffff;
  --ink: #1a1a1c;
  --muted: #6b6a66;
  --line: #e4e1db;
  --brand: #22223b;
  --link: #3d3d6b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.back {
  display: inline-block;
  margin-bottom: 1.25rem;
  color: var(--link);
  text-decoration: none;
  font-size: 0.95rem;
}

.back:hover { text-decoration: underline; }

h1 {
  margin: 0 0 0.35rem;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
}

h2 {
  margin: 2rem 0 0.6rem;
  font-size: 1.15rem;
}

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

p, li { color: #2a2a2c; }

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

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.1rem 1.15rem;
  margin: 1rem 0;
}

ol, ul { padding-left: 1.2rem; }

footer {
  margin-top: 3rem;
  color: var(--muted);
  font-size: 0.9rem;
}