:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --ink: #1b1d1f;
  --muted: #5d6166;
  --line: #e3e4e2;
  --note-bg: #f2f3f1;
  --accent: #1f5f4a;
  --accent-bg: #e8f1ed;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141516;
    --surface: #1a1c1d;
    --ink: #e8e9e7;
    --muted: #9da1a5;
    --line: #2c2e30;
    --note-bg: #1d1f21;
    --accent: #6fbf9f;
    --accent-bg: #18291f;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
  word-break: keep-all;
  overflow-wrap: break-word;
}
a { color: var(--accent); text-underline-offset: 3px; }

/* 상단 막대 */
.bar { border-bottom: 1px solid var(--line); background: var(--surface); }
.bar-in { max-width: 960px; margin: 0 auto; padding: 14px 16px; display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; }
.brand span { color: var(--accent); font-weight: 600; margin-left: 6px; }
.bar nav { display: flex; gap: 14px; flex-wrap: wrap; font-size: 14px; margin-left: auto; }
.bar nav a { color: var(--muted); text-decoration: none; }
.bar nav a:hover { color: var(--ink); }

main { max-width: 960px; margin: 0 auto; padding: 48px 16px 48px; }
main.doc { max-width: 720px; }

.hero h1 { font-size: 32px; line-height: 1.3; margin: 0 0 14px; letter-spacing: -.01em; }
.hero p { margin: 0 0 10px; max-width: 680px; }
.meta { color: var(--muted); font-size: 14px; }

section.blk { padding: 36px 0 8px; border-top: 1px solid var(--line); margin-top: 36px; }
section.blk > h2 { font-size: 22px; margin: 0 0 6px; }
section.blk > .lead { color: var(--muted); margin: 0 0 20px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 18px; }
.card h3 { font-size: 16px; margin: 0 0 10px; }
.card ul { list-style: none; margin: 0; padding: 0; }
.card li { padding: 6px 0 6px 26px; position: relative; border-top: 1px solid var(--line); font-size: 15px; }
.card li:first-child { border-top: 0; }
.card li::before { content: "✓"; position: absolute; left: 4px; color: var(--accent); font-weight: 700; }
.card li small { display: block; color: var(--muted); font-size: 13px; line-height: 1.5; }
.card p { margin: 0 0 8px; font-size: 15px; }

table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 8px 0 16px; }
th, td { text-align: left; vertical-align: top; padding: 9px 10px; border-bottom: 1px solid var(--line); }
th { font-weight: 600; color: var(--muted); font-size: 13px; }
.tbl { overflow-x: auto; }

.doclist { display: grid; gap: 10px; }
.docrow { display: flex; gap: 12px; align-items: baseline; justify-content: space-between; flex-wrap: wrap; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; }
.docrow b { display: block; }
.docrow span { color: var(--muted); font-size: 14px; }
.tag { font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 999px; white-space: nowrap; background: var(--accent-bg); color: var(--accent); }
.tag.req { background: var(--note-bg); color: var(--muted); }

details { border-top: 1px solid var(--line); padding: 12px 0; }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 600; }
details p { margin: 10px 0 0; color: var(--ink); }

.note { margin: 14px 0 0; padding: 12px 14px; background: var(--note-bg); border-radius: 6px; font-size: 14px; color: var(--muted); }
.note b { color: var(--ink); font-weight: 600; margin-right: 6px; }

footer { max-width: 960px; margin: 0 auto; padding: 24px 16px 48px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer p { margin: 0 0 6px; }

/* 문서 페이지 (개요·기준) */
.doc h1 { font-size: 28px; line-height: 1.3; margin: 0 0 12px; }
.doc h2 { font-size: 20px; margin: 36px 0 10px; padding-top: 24px; border-top: 1px solid var(--line); }
.doc h3 { font-size: 17px; margin: 24px 0 8px; }
.doc blockquote { margin: 14px 0; padding: 10px 14px; background: var(--note-bg); border-radius: 6px; color: var(--muted); }
.doc blockquote p { margin: 4px 0; }
.doc hr { display: none; }

/* 기준(약관) 페이지 */
section.art { padding: 26px 0; border-top: 1px solid var(--line); }
section.art h2 { font-size: 18px; margin: 0 0 12px; padding: 0; border: 0; }
h2 .no { color: var(--accent); margin-right: 6px; }
.para { display: grid; grid-template-columns: 22px 1fr; margin: 0 0 8px; }
.para > .m { color: var(--muted); }
.para > div > p { margin: 0; }
ol.items { margin: 6px 0 4px; padding-left: 20px; }
ol.items li { margin: 2px 0; padding-left: 2px; }


@media (max-width: 600px) {
  main { padding-top: 32px; }
  .hero h1 { font-size: 26px; }
  .bar nav { margin-left: 0; }
}

.doc footer { padding-left: 0; padding-right: 0; }