/* 한국사 나무 — 종이색 바탕 + 붉은 낙관. 외부 글꼴 없음(시스템 한국어 글꼴 스택). */
:root {
  --bg: #F3EBDD; --paper: #FBF5E8; --ink: #1F1A17; --muted: #6b6258;
  --red: #B5352B; --blue: #2E5E8C; --gold: #B8963E; --line: #d9ccb4;
  --link: #8f2a22;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1a1613; --paper: #231e1a; --ink: #eadfcb; --muted: #a39786;
    --red: #d9695e; --blue: #7fa9d4; --gold: #d2b366; --line: #3a322a; --link: #e58a80;
  }
}
:root[data-theme="dark"] {
  --bg: #1a1613; --paper: #231e1a; --ink: #eadfcb; --muted: #a39786;
  --red: #d9695e; --blue: #7fa9d4; --gold: #d2b366; --line: #3a322a; --link: #e58a80;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Noto Serif KR", "Nanum Myeongjo", "Batang", "AppleMyungjo", "Malgun Gothic", "Apple SD Gothic Neo", serif;
  font-size: 17px; line-height: 1.85; word-break: keep-all; overflow-wrap: break-word;
}
h1, h2, h3, .nav, .brand, .tag, .pager span, .note, .crumb, .site-footer, dt {
  font-family: system-ui, -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
}
.wrap { max-width: 44rem; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 8px; top: 8px; background: var(--paper); padding: 6px 10px; z-index: 9; }
a { color: var(--link); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }

.site-header { border-bottom: 3px double var(--line); background: var(--paper); }
.bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 18px; padding-top: 10px; padding-bottom: 10px; }
.brand { font-weight: 700; font-size: 1.1rem; color: var(--ink); text-decoration: none; display: inline-flex; align-items: center; gap: 10px; }
.seal { display: inline-grid; place-items: center; width: 1.9rem; height: 1.9rem; background: var(--red); color: #fff7ea; border-radius: 3px; font-family: "Noto Serif KR","Batang",serif; font-size: 1.1rem; font-weight: 700; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: .95rem; }
.nav a { color: var(--ink); text-decoration: none; padding: 4px 0; border-bottom: 2px solid transparent; }
.nav a[aria-current="page"], .nav a:hover { border-bottom-color: var(--red); }

main { padding-top: 22px; padding-bottom: 40px; }
h1 { font-size: 1.7rem; line-height: 1.35; margin: .4em 0 .6em; }
h2 { font-size: 1.25rem; margin: 1.8em 0 .5em; padding-bottom: 4px; border-bottom: 2px solid var(--line); }
h3 { font-size: 1.05rem; margin: 1.2em 0 .4em; }
h2.era { color: var(--red); border-bottom-color: var(--red); margin-top: 2em; }
p { margin: .7em 0; }
.lead { font-size: 1.08rem; color: var(--muted); }
.note { font-size: .88rem; color: var(--muted); line-height: 1.6; }
.muted { color: var(--muted); }
.ph { background: color-mix(in srgb, var(--gold) 25%, transparent); padding: 0 4px; border-radius: 3px; }
.crumb { font-size: .85rem; color: var(--muted); margin: 0; }
.tag { display: inline-block; font-size: .72rem; padding: 0 7px; border: 1px solid var(--line); border-radius: 10px; color: var(--muted); vertical-align: middle; }
code { font-family: ui-monospace, Consolas, monospace; font-size: .9em; background: color-mix(in srgb, var(--line) 50%, transparent); padding: 1px 4px; border-radius: 3px; }

.hero { text-align: center; padding: 26px 0 10px; }
.hero .seal { width: 3.4rem; height: 3.4rem; font-size: 2rem; }

.facts { background: var(--paper); border: 1px solid var(--line); border-left: 4px solid var(--red); border-radius: 4px; padding: 10px 14px; margin: 14px 0; }
.facts div { display: grid; grid-template-columns: 6.5rem 1fr; gap: 8px; padding: 4px 0; }
.facts dt { font-size: .85rem; color: var(--muted); }
.facts dd { margin: 0; font-size: .95rem; line-height: 1.65; }
@media (max-width: 520px) { .facts div { grid-template-columns: 1fr; gap: 0; } }

blockquote { margin: .8em 0; padding: 2px 14px; border-left: 3px solid var(--gold); background: var(--paper); }
ul { padding-left: 1.3em; } li { margin: .3em 0; }
.src { margin-top: 1em; }
.src h3 { color: var(--red); }
.tablewrap { overflow-x: auto; margin: .8em 0; }
table { border-collapse: collapse; font-size: .92rem; line-height: 1.6; min-width: 100%; }
th, td { border: 1px solid var(--line); padding: 6px 9px; text-align: left; vertical-align: top; }
th { background: var(--paper); font-family: system-ui, "Malgun Gothic", sans-serif; }
.refs { list-style: none; padding: 0; } .refs li { margin: .25em 0; }

.toc { list-style: none; padding: 0; }
.toc li { margin: .15em 0; font-size: .95rem; line-height: 1.6; }
.eid { font-family: ui-monospace, Consolas, monospace; font-size: .78rem; color: var(--muted); margin-right: 4px; }
.trunk { scroll-margin-top: 10px; }

.cards { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr)); gap: 10px; }
.cards a { display: block; height: 100%; padding: 10px 14px; background: var(--paper); border: 1px solid var(--line); border-radius: 4px; text-decoration: none; color: var(--ink); }
.cards a:hover { border-color: var(--red); }
.cards strong { display: block; font-family: system-ui, "Malgun Gothic", sans-serif; }
.cards span { font-size: .85rem; color: var(--muted); line-height: 1.5; display: block; }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 2em; }
.pager a { display: block; padding: 10px 14px; border: 1px solid var(--line); border-radius: 4px; background: var(--paper); text-decoration: none; color: var(--ink); font-size: .92rem; line-height: 1.5; }
.pager a[rel="next"] { text-align: right; }
.pager span { display: block; font-size: .78rem; color: var(--muted); }
@media (max-width: 520px) { .pager { grid-template-columns: 1fr; } }

.gameframe { border: 1px solid var(--line); border-radius: 4px; overflow: hidden; background: #111; margin: 14px 0; }
.gameframe iframe { display: block; border: 0; width: 100%; max-width: 100%; }
.adbox { margin: 2em 0; text-align: center; min-height: 100px; }
.adlabel { font-size: .72rem; color: var(--muted); margin: 0 0 4px; font-family: system-ui, sans-serif; }

.site-footer { border-top: 3px double var(--line); background: var(--paper); font-size: .85rem; color: var(--muted); padding: 16px 0 26px; }
.site-footer a { color: var(--muted); }
.site-footer p { margin: .4em 0 0; }
@media (max-width: 520px) { body { font-size: 16px; } h1 { font-size: 1.45rem; } }

/* 도구 구역: 도구 조각이 자체 style(.tk)을 들고 오므로 사이트 색(다크 모드 포함)에 맞춰 덮어쓴다 */
.toolbox { max-width: 100%; overflow-x: auto; margin: 14px 0; }
.toolbox .tk .res { background: var(--paper); border-color: var(--line); color: var(--ink); }
.toolbox .tk .err { color: var(--red); }
.toolbox .tk input, .toolbox .tk select, .toolbox .tk textarea { background: var(--paper); color: var(--ink); border-color: var(--line); }
.toolbox .tk td, .toolbox .tk th { border-color: var(--line); }
.toolbox form.calc { background: var(--paper); border: 1px solid var(--line); border-radius: 4px; padding: 12px 16px; }
.toolbox form.calc label { display: block; margin: 10px 0; font-size: .95rem; color: var(--muted); }
.toolbox form.calc input, .toolbox form.calc select { display: block; width: 100%; max-width: 100%; margin-top: 4px; padding: 10px; font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 6px; }
.toolbox form.calc button { margin-top: 8px; padding: 10px 22px; font: inherit; font-weight: 700; color: #fff; background: var(--blue); border: 0; border-radius: 6px; cursor: pointer; }
.toolbox #result { margin-top: 14px; padding: 12px 14px; background: var(--bg); border-radius: 4px; line-height: 1.9; overflow-wrap: anywhere; }
.toolbox .meta { font-size: .88rem; color: var(--muted); line-height: 1.6; }
.toolarticle table, .post table { border-collapse: collapse; font-size: .92rem; margin: .8em 0; display: block; max-width: 100%; overflow-x: auto; }