/* 공문데스크 공통 스타일
   배치: 공문 제목 띠(하늘색 줄 + 남색 굵은 줄)를 사이트 전체의 표지로 쓰고, 그 아래는 차분한 서류 책상 */
:root{
  --bg:#F2F4F7; --surface:#FFFFFF; --ink:#1A2233; --muted:#5A6476; --line:#D5DAE2;
  --navy:#1F3864; --sky:#8EB4E3; --seal:#B42A2F; --on-navy:#FFFFFF; --soft:#E8EDF5;
  --f-display:"Gowun Batang","휴먼명조","Batang",serif;
  --f-body:"IBM Plex Sans KR","Malgun Gothic","Apple SD Gothic Neo",system-ui,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#12161D; --surface:#1B212B; --ink:#E5E9F0; --muted:#9AA4B4; --line:#2E3644;
  --navy:#8EB4E3; --sky:#5D86BF; --seal:#E5636A; --on-navy:#0F1520; --soft:#222A36; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#12161D; --surface:#1B212B; --ink:#E5E9F0; --muted:#9AA4B4; --line:#2E3644;
  --navy:#8EB4E3; --sky:#5D86BF; --seal:#E5636A; --on-navy:#0F1520; --soft:#222A36; color-scheme:dark}

*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 var(--f-body);word-break:keep-all;overflow-wrap:anywhere}
a{color:var(--navy)}
a:focus-visible,button:focus-visible{outline:2px solid var(--navy);outline-offset:2px}
.wrap{max-width:1080px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}

/* 대문 */
.hero{padding-block:44px 28px}
.eyebrow{font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--seal);margin:0 0 10px}
.hero h1{font:700 clamp(30px,5vw,46px)/1.25 var(--f-display);margin:0;text-wrap:balance;letter-spacing:-.02em}
.hero p.lead{font-size:18px;color:var(--muted);max-width:44em;margin:14px 0 0}
.promise{display:flex;flex-wrap:wrap;gap:8px 18px;margin:18px 0 0;padding:0;list-style:none;font-size:14px;color:var(--muted)}
.promise li::before{content:"□ ";color:var(--navy);font-weight:700}

.tools{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr) minmax(0,1fr);gap:16px;padding-block:12px 8px}
@media (max-width:900px){.tools{grid-template-columns:minmax(0,1fr)}}
.tool{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:22px;display:flex;flex-direction:column;gap:10px;min-width:0}
.tool.main{border-top:5px solid var(--navy)}
.tool .kind{font-size:12px;font-weight:600;letter-spacing:.05em;color:var(--muted)}
.tool h2{font:700 23px/1.3 var(--f-display);margin:0}
.tool p{margin:0;color:var(--muted);font-size:15px}
.tool ul{margin:0;padding-left:1.2em;font-size:14.5px}
.tool .go{margin-top:auto;padding-top:6px}
.btn{display:inline-flex;align-items:center;gap:6px;font:600 15px/1 var(--f-body);text-decoration:none;border-radius:7px;padding:12px 16px;border:1px solid var(--line);color:var(--ink);background:var(--surface)}
.btn.primary{background:var(--navy);border-color:var(--navy);color:var(--on-navy)}
.btn:hover{filter:brightness(1.06)}

/* 미니 공문 견본 (대문 한글 변환기 카드) */
.mini-doc{background:#fff;color:#111;border:1px solid var(--line);border-radius:4px;padding:12px 14px;font:12px/1.55 "Noto Serif KR","휴먼명조",serif}
.mini-doc .t{text-align:center;font:700 14px/1.3 "Noto Sans KR","HY헤드라인M",sans-serif;border-top:2px solid #8EB4E3;border-bottom:4px solid #1F3864;padding:4px 0;margin-bottom:6px}
.mini-doc .h{font-family:"Noto Sans KR",sans-serif;font-weight:700;margin-top:4px}
.mini-doc .l1{padding-left:1.1em;text-indent:-1.1em;margin-left:.4em}
.mini-doc .l2{padding-left:.9em;text-indent:-.9em;margin-left:1.6em}

.section{padding-block:36px 8px}
.section h2.sec{font:700 24px/1.3 var(--f-display);margin:0 0 14px}
.why{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
@media (max-width:760px){.why{grid-template-columns:minmax(0,1fr)}}
.why div{border-top:2px solid var(--line);padding-top:12px}
.why b{display:block;font-size:16px;margin-bottom:4px}
.why p{margin:0;color:var(--muted);font-size:15px}
.guides{list-style:none;margin:0;padding:0;display:grid;gap:0;border-top:1px solid var(--line)}
.guides li{border-bottom:1px solid var(--line)}
.guides a{display:flex;justify-content:space-between;gap:16px;padding:14px 2px;text-decoration:none;color:var(--ink)}
.guides a span{color:var(--muted);font-size:14px;flex:none}
.guides a:hover strong{text-decoration:underline}

/* 글 (안내·소개·개인정보) */
.article{max-width:720px;padding-block:36px 24px}
.article h1{font:700 clamp(26px,4.4vw,36px)/1.3 var(--f-display);margin:0 0 8px;text-wrap:balance}
.article .meta{color:var(--muted);font-size:14px;margin:0 0 24px}
.article h2{font:700 21px/1.4 var(--f-display);margin:34px 0 10px;text-wrap:balance}
.article h3{font-size:17px;margin:22px 0 6px}
.article p,.article li{font-size:16.5px}
.article ol,.article ul{padding-left:1.4em}
.article li{margin:4px 0}
.article .box{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--navy);border-radius:6px;padding:14px 16px;margin:18px 0}
.article .box p{margin:0}
.article pre{background:var(--soft);border-radius:6px;padding:12px 14px;white-space:pre-wrap;font:14px/1.6 ui-monospace,Consolas,monospace;overflow-x:auto}
.article table{border-collapse:collapse;width:100%;font-size:15px;margin:12px 0}
.article th,.article td{border:1px solid var(--line);padding:7px 10px;text-align:left;vertical-align:top}
.article th{background:var(--soft)}
.tablewrap{overflow-x:auto}
.cta{margin:28px 0 0;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:10px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}
.cta p{margin:0;font-weight:600}

@media (prefers-reduced-motion:reduce){*{transition:none!important}}