:root {
  --bg: #f7f8ff;
  --card: #ffffff;
  --ink: #171a2c;
  --muted: #69708a;
  --line: #d4d8ea;
  --brand: #3f5fd7;
  --brand-deep: #2944b6;
  --danger: #e54861;
}
* { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}
header, main, footer {
  width: min(760px, 100%);
  padding: 0 20px;
}
header {
  padding-top: 28px;
  padding-bottom: 8px;
}
.brand {
  font-weight: 700;
  color: var(--brand-deep);
  letter-spacing: -0.02em;
  text-decoration: none;
}
nav a {
  color: var(--brand);
  margin-right: 16px;
  text-decoration: none;
}
nav a:hover { text-decoration: underline; }
h1 { font-size: 1.7rem; margin: 12px 0 8px; }
h2 { font-size: 1.15rem; margin-top: 28px; }
p, li { color: var(--ink); }
.muted, .updated { color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px 22px 8px;
  margin: 16px 0 40px;
}
.copy-id { display: none; }
.copy-en { display: block; }
html[data-lang="id"] .copy-id { display: block; }
html[data-lang="id"] .copy-en { display: none; }
html[data-lang="en"] .copy-id { display: none; }
html[data-lang="en"] .copy-en { display: block; }
ol { padding-left: 1.2rem; }
footer {
  padding: 8px 20px 36px;
  color: var(--muted);
  font-size: 0.9rem;
}
.danger { color: var(--danger); font-weight: 600; }