:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5b6475;
  --line: #e4e8ef;
  --accent: #315efb;
  --surface: #ffffff;
  --canvas: #f6f8fb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  line-height: 1.7;
}

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

.shell {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 64px;
}

header {
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2, h3 { line-height: 1.25; }
h1 { margin: 0 0 10px; font-size: clamp(2rem, 5vw, 3rem); }
h2 { margin: 36px 0 12px; font-size: 1.35rem; }
h3 { margin: 24px 0 8px; font-size: 1.05rem; }

.lede, .meta { color: var(--muted); }
.meta { font-size: 0.9rem; }

main {
  padding: 28px clamp(20px, 5vw, 42px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 12px 36px rgba(23, 32, 51, 0.06);
}

ul { padding-left: 1.25rem; }
li + li { margin-top: 6px; }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 24px;
}

.nav a {
  display: inline-block;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  text-decoration: none;
  font-weight: 650;
}

footer {
  padding-top: 20px;
  color: var(--muted);
  font-size: 0.88rem;
}

code {
  padding: 0.1em 0.35em;
  border-radius: 5px;
  background: #eef2f8;
}

@media (max-width: 520px) {
  .shell { width: min(100% - 20px, 760px); padding-top: 28px; }
  main { padding: 22px 18px; border-radius: 14px; }
}