:root {
  --fg: #1a1a2e;
  --muted: #5b5b6b;
  --line: #e6e6ee;
  --bg: #ffffff;
  --soft: #f7f7fb;
  --brand: #3b5bdb;
  --max: 760px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo",
    "Pretendard", "Noto Sans KR", Roboto, sans-serif;
  line-height: 1.7;
  font-size: 16px;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 32px 20px 96px;
  /* iOS safe-area (앱 WebView 노치 대응) */
  padding-left: max(20px, env(safe-area-inset-left));
  padding-right: max(20px, env(safe-area-inset-right));
  padding-bottom: max(96px, env(safe-area-inset-bottom));
}

header.doc-head {
  border-bottom: 1px solid var(--line);
  padding-bottom: 20px;
  margin-bottom: 28px;
}

.eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--brand);
  margin: 0 0 6px;
}

h1 {
  font-size: 26px;
  line-height: 1.3;
  margin: 0 0 10px;
}

.meta {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

h2 {
  font-size: 19px;
  margin: 40px 0 12px;
  padding-top: 8px;
}

h3 {
  font-size: 16px;
  margin: 22px 0 8px;
}

p,
li {
  color: var(--fg);
}

ul,
ol {
  padding-left: 22px;
}

li {
  margin: 4px 0;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 14px;
}

th,
td {
  border: 1px solid var(--line);
  padding: 9px 11px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--soft);
  font-weight: 700;
  white-space: nowrap;
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.callout {
  background: var(--soft);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 16px 0;
  font-size: 14.5px;
}

footer.doc-foot {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}

.doc-nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 10px;
}

/* index 허브 */
.hub-card {
  display: block;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 22px;
  margin: 14px 0;
  transition: border-color 0.15s, transform 0.15s;
}

.hub-card:hover {
  border-color: var(--brand);
  text-decoration: none;
  transform: translateY(-1px);
}

.hub-card h2 {
  margin: 0 0 4px;
  font-size: 18px;
  color: var(--fg);
}

.hub-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e8f0;
    --muted: #a0a0b0;
    --line: #2a2a3a;
    --bg: #14141c;
    --soft: #1d1d28;
    --brand: #8ea2ff;
  }
}