:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --text: #1b1f27;
  --muted: #5b6372;
  --line: #e1e5ec;
  --accent: #1f5fd6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --surface: #1b1f27;
    --text: #e8ebf0;
    --muted: #a0a8b6;
    --line: #2b313c;
    --accent: #7aa6ff;
  }
}
* { box-sizing: border-box; }
html { font-size: 17px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Pretendard", "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  line-height: 1.6;
  word-break: keep-all;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.top, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
.top { display: flex; justify-content: space-between; align-items: center; height: 64px; }
.brand { font-weight: 700; color: var(--text); font-size: 1.1rem; }
.top nav a { margin-left: 16px; color: var(--muted); }
.hero { padding: 48px 0 24px; }
.hero h1 { font-size: 1.9rem; line-height: 1.3; margin: 0 0 12px; }
.hero p, .meta { color: var(--muted); }
.apps h2, .doc h2 { font-size: 1.2rem; margin: 32px 0 12px; }
.app { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 20px 22px; }
.app h3 { margin: 0 0 8px; font-size: 1.15rem; }
.app p { margin: 0 0 8px; }
.doc h1 { font-size: 1.7rem; line-height: 1.3; margin: 40px 0 8px; }
.doc .dates { color: var(--muted); margin: 0 0 24px; }
.doc h3 { font-size: 1.02rem; margin: 20px 0 6px; }
.doc ul { padding-left: 20px; }
.doc li { margin: 4px 0; }
.doc table { border-collapse: collapse; width: 100%; margin: 8px 0 16px; font-size: 0.95rem; }
.doc th, .doc td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.doc th { background: var(--surface); }
footer { padding: 40px 20px 48px; color: var(--muted); font-size: 0.95rem; border-top: 1px solid var(--line); margin-top: 48px; }