:root {
  --bg: #ffffff;
  --bg-soft: #f7f7f9;
  --surface: #ffffff;
  --border: #e4e4ea;
  --text: #1c1c22;
  --text-muted: #5d5d6b;
  --accent: #4c4bb8;
  --accent-soft: #eeeefb;
  --star: #e8a013;
  --night-1: #171634;
  --night-2: #2b2560;
  --radius: 14px;
  --maxw: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131318;
    --bg-soft: #1a1a21;
    --surface: #1a1a21;
    --border: #33333f;
    --text: #ececf1;
    --text-muted: #a2a2b4;
    --accent: #a5a4f5;
    --accent-soft: #232246;
    --star: #f5c04e;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo",
    "Noto Sans KR", "Malgun Gothic", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- site header ---------- */
.site-head {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-head .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 60px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--text);
  font-size: 1rem;
}
.brand:hover { text-decoration: none; }
.brand .star { color: var(--star); }
.site-nav {
  display: flex;
  gap: 18px;
  font-size: 0.9rem;
}
.site-nav a { color: var(--text-muted); }

/* ---------- doc pages ---------- */
main { padding: 40px 0 72px; }

.doc h1 {
  font-size: 1.75rem;
  line-height: 1.35;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.doc h2 {
  font-size: 1.15rem;
  margin: 44px 0 12px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  letter-spacing: -0.01em;
}
.doc h2:first-of-type { border-top: none; padding-top: 0; }
.doc h3 { font-size: 1rem; margin: 28px 0 8px; }
.doc p, .doc li { color: var(--text); }
.doc ul, .doc ol { padding-left: 1.3em; }
.doc li { margin: 6px 0; }
.doc hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}
.doc strong { font-weight: 700; }

.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 0.92rem;
}
.doc th, .doc td {
  border: 1px solid var(--border);
  padding: 9px 12px;
  text-align: left;
  vertical-align: top;
}
.doc th { background: var(--bg-soft); font-weight: 600; }

.table-scroll { overflow-x: auto; }

.effective {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 28px;
}
.effective strong { font-weight: 600; color: var(--text); }

/* ---------- footer ---------- */
.site-foot {
  border-top: 1px solid var(--border);
  padding: 28px 0 48px;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.site-foot .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: space-between;
}
.site-foot a { color: var(--text-muted); }

@media (max-width: 560px) {
  body { font-size: 15px; }
  .doc h1 { font-size: 1.45rem; }
  .site-nav { gap: 12px; font-size: 0.85rem; }
}

/* ---------- app landing ---------- */
.features { padding: 40px 0 8px; }
.feature {
  display: flex;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
}
.feature:last-of-type { border-bottom: none; }
.feature-icon {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--accent-soft);
  display: grid;
  place-items: center;
  font-size: 1.2rem;
}
.feature h2 { font-size: 1.05rem; margin: 4px 0 6px; letter-spacing: -0.01em; }
.feature p { margin: 0; color: var(--text-muted); font-size: 0.95rem; }

.legal {
  margin: 40px 0 16px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px;
}
.legal h2 { font-size: 1rem; margin: 0 0 6px; }
.legal p { margin: 0 0 16px; color: var(--text-muted); font-size: 0.92rem; }
.legal-links { display: flex; flex-wrap: wrap; gap: 10px 12px; }
.legal-links a {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 0.9rem;
}
.legal-links a:hover { text-decoration: none; border-color: var(--accent); }

.back { margin: 0 0 64px; font-size: 0.9rem; }
.back a { color: var(--text-muted); }

@media (max-width: 560px) {
  .legal { padding: 22px 20px; }
}