/* about.html · privacy.html 공용 스타일 (앱 index.html과 같은 색상) */
:root {
  --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 45%, #fdf4ff 100%);
  --card-bg: rgba(255, 255, 255, 0.92);
  --card-border: rgba(226, 232, 240, 0.85);
  --card-shadow: 0 16px 36px -10px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.04);
  --text-main: #0f172a;
  --text-muted: #64748b;
  --sub-bg: #f8fafc;
  --sub-border: #e2e8f0;
  --primary: #6366f1;
  --link: #4f46e5;
}
body.dark {
  --bg-gradient: linear-gradient(135deg, #090d16 0%, #111827 50%, #1e1333 100%);
  --card-bg: rgba(30, 41, 59, 0.88);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-shadow: 0 20px 45px -12px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.06);
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --sub-bg: #0f172a;
  --sub-border: #334155;
  --link: #a5b4fc;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  min-height: 100vh;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.75;
  padding: 20px 16px 48px;
}

.page-top {
  max-width: 760px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.back-link {
  color: var(--text-main);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  padding: 8px 14px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 9999px;
  box-shadow: var(--card-shadow);
  white-space: nowrap;
}
.lang-switch {
  display: flex;
  gap: 2px;
  padding: 4px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 9999px;
  box-shadow: var(--card-shadow);
}
.lang-btn {
  border: none;
  background: transparent;
  color: var(--text-main);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 9999px;
  cursor: pointer;
}
.lang-btn.active {
  background: var(--primary);
  color: #fff;
}

.doc {
  max-width: 760px;
  margin: 0 auto;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  box-shadow: var(--card-shadow);
  padding: 36px 32px;
}
.doc h1 {
  font-size: 28px;
  line-height: 1.3;
  margin-bottom: 12px;
}
.doc h2 {
  font-size: 19px;
  line-height: 1.4;
  margin: 32px 0 10px;
}
.doc h3 {
  font-size: 16px;
  margin: 18px 0 6px;
}
.doc p,
.doc li,
.doc dd,
.doc td,
.doc th {
  font-size: 15px;
}
.doc p + p {
  margin-top: 8px;
}
.doc ul {
  padding-left: 1.3em;
}
.doc li + li {
  margin-top: 6px;
}
.doc a {
  color: var(--link);
  word-break: break-all;
}
.doc .lead {
  color: var(--text-muted);
}
.doc .meta {
  font-size: 13px;
  color: var(--text-muted);
}
.doc .note {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 8px;
}
.doc table {
  width: 100%;
  border-collapse: collapse;
}
.doc th,
.doc td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--sub-border);
  vertical-align: top;
}
.doc th {
  background: var(--sub-bg);
  font-weight: 700;
  white-space: nowrap;
}

.doc dl {
  background: var(--sub-bg);
  border: 1px solid var(--sub-border);
  border-radius: 14px;
  padding: 12px 16px;
  margin-top: 10px;
}
.doc dt {
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 4px;
}
.doc dd {
  color: var(--text-main);
}
.doc dd span {
  color: var(--text-muted);
}

.page-footer {
  max-width: 760px;
  margin: 20px auto 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}
.page-footer a {
  color: var(--text-muted);
}

/* 언어별 내용: html의 data-lang과 같은 lang만 보인다 */
.lang-block,
.lang-inline {
  display: none;
}
html[data-lang="ko"] .lang-block[lang="ko"],
html[data-lang="en"] .lang-block[lang="en"],
html[data-lang="zh"] .lang-block[lang="zh"],
html[data-lang="ja"] .lang-block[lang="ja"] {
  display: block;
}
html[data-lang="ko"] .lang-inline[lang="ko"],
html[data-lang="en"] .lang-inline[lang="en"],
html[data-lang="zh"] .lang-inline[lang="zh"],
html[data-lang="ja"] .lang-inline[lang="ja"] {
  display: inline;
}

@media (max-width: 540px) {
  body {
    padding: 12px 12px 36px;
  }
  .doc {
    padding: 26px 18px;
    border-radius: 20px;
  }
  .doc h1 {
    font-size: 24px;
  }
  .doc h2 {
    font-size: 17px;
    margin-top: 26px;
  }
  .doc th,
  .doc td {
    padding: 7px 8px;
    font-size: 14px;
  }
}