/* 사이트베이직스 (sitebasics.net) — 설계도(블루프린트) 테마. 남색·노랑, 모눈 배경, 각진 선. 글꼴 IBM Plex Sans KR / IBM Plex Mono */
:root{
  --navy:#1E2A4A; --navy2:#3B4E86; --yellow:#F5E663; --cream:#FFFBD6; --gray:#9AA3B5; --line:#C9D0DE; --line2:#E3E7F0;
  --bg:#F4F6FA; --paper:#FFFFFF; --text:#1E2A4A; --muted:#5A6478; --body:#3D4760;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body.sb-body{margin:0;color:var(--text);font-family:"IBM Plex Sans KR",system-ui,-apple-system,sans-serif;line-height:1.7;word-break:keep-all;overflow-wrap:anywhere;-webkit-font-smoothing:antialiased;
  background-color:var(--bg);background-image:linear-gradient(var(--line2) 1px,transparent 1px),linear-gradient(90deg,var(--line2) 1px,transparent 1px);background-size:24px 24px}
.sb-body a{color:var(--navy)}
.sb-body a:hover{color:var(--navy2)}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.bskip{position:absolute;left:-9999px;top:8px;background:var(--navy);color:#fff!important;padding:8px 14px;z-index:99}
.bskip:focus{left:12px}
.bkick,.code,.no,.dm,.bspec .k,.bdate{font-family:"IBM Plex Mono",ui-monospace,monospace}
.bkick{margin:0 0 4px;font-size:.76rem;letter-spacing:.14em;color:var(--muted)}
.bsec{font-size:1.75rem;line-height:1.35;margin:0 0 8px;font-weight:700}
.blead{color:var(--body);margin:0 0 20px;max-width:72ch}
.bblock{margin:0 0 56px;scroll-margin-top:80px}
.bmain{padding-top:44px;padding-bottom:10px}
.bmain.solo{padding-top:24px}
.bmain.narrow{max-width:900px}
.code{display:inline-block;font-size:.72rem;font-weight:600;color:var(--muted);margin-right:8px}

/* 헤더 */
.btop{background:var(--paper);border-bottom:2px solid var(--navy);position:sticky;top:0;z-index:40}
.btop-in{display:flex;align-items:center;gap:14px;min-height:64px}
.bbrand img{display:block;height:40px;width:auto}
.bnav{margin-left:auto;display:flex;align-items:center;gap:2px}
.bnav>a,.bdd-btn{padding:9px 12px;color:var(--navy)!important;text-decoration:none;font:inherit;font-weight:500;font-size:.95rem;background:none;border:0;cursor:pointer}
.bnav>a:hover,.bdd-btn:hover,.bdd.open .bdd-btn{background:var(--yellow)}
.bdd{position:relative}
.bdd-menu{display:none;position:absolute;top:calc(100% + 2px);left:0;min-width:220px;background:var(--paper);border:2px solid var(--navy);padding:6px 0;box-shadow:6px 6px 0 rgba(30,42,74,.12)}
.bdd.open .bdd-menu{display:block}
.bdd-menu a{display:block;padding:7px 14px;text-decoration:none;font-size:.93rem;color:var(--navy)}
.bdd-menu a:hover{background:var(--cream)}
.bmbtn{display:none;margin-left:auto;background:var(--paper);border:2px solid var(--navy);color:var(--navy);padding:4px 11px;font-size:1.2rem;cursor:pointer}

/* 히어로 */
.bhero{padding:48px 0 36px}
.bhero-in{display:flex;flex-wrap:wrap;align-items:center;gap:32px}
.bhero-copy{flex:999 1 540px;min-width:0}
.bhero-art{flex:1 1 300px;min-width:0;display:flex;justify-content:center}
.bhero-art img{max-width:100%;height:auto}
.bhero h1{margin:0 0 16px;font-size:2.75rem;line-height:1.25;font-weight:700;letter-spacing:-.01em}
.bhero h1 span{background:linear-gradient(transparent 58%,var(--yellow) 58%)}
.bsub{margin:0 0 22px;font-size:1.06rem;color:var(--body);max-width:600px}
.bsearch{display:flex;flex-wrap:wrap;max-width:600px;border:2px solid var(--navy);background:var(--paper)}
.bsearch input{flex:1 1 240px;min-width:0;border:0;padding:13px 16px;font:inherit;color:var(--navy);background:transparent}
.bsearch input:focus{outline:none;background:var(--cream)}
.bsearch button{border:0;background:var(--navy);color:#fff;font:inherit;font-weight:700;padding:12px 26px;min-height:48px;cursor:pointer}
.bspec{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border:2px solid var(--navy);background:var(--paper);margin-top:30px}
.bspec>div{padding:14px 18px;border-right:1px solid var(--line)}
.bspec>div:last-child{border-right:0}
.bspec p{margin:0}
.bspec .k{font-size:.75rem;color:var(--muted)}
.bspec .v{font-size:1.55rem;font-weight:700}

/* 스타터 키트 + 오늘의 기본기 */
.bstarter-row{display:flex;flex-wrap:wrap;gap:24px;align-items:stretch}
.bstarter{flex:999 1 640px;min-width:0;background:var(--paper);border:2px solid var(--navy);padding:24px}
.bkit{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.bkit li{display:flex;align-items:center;gap:10px;border:1.5px solid var(--line);padding:8px 10px;min-height:54px;background:var(--paper)}
.bkit li:has(input:checked){border-color:var(--navy);background:var(--cream)}
.bkit-chk{flex:none;display:grid;place-items:center;cursor:pointer}
.bkit-chk input{appearance:none;-webkit-appearance:none;width:22px;height:22px;border:2px solid var(--navy);background:var(--paper);margin:0;cursor:pointer;display:grid;place-items:center}
.bkit-chk input:checked{background:var(--yellow)}
.bkit-chk input:checked::after{content:"✓";font-weight:700;font-size:14px;color:var(--navy)}
.bkit a{display:flex;flex-direction:column;min-width:0;text-decoration:none;line-height:1.35}
.bkit a b{font-size:.95rem}
.bkit a span{font-family:"IBM Plex Mono",monospace;font-size:.76rem;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.btip{flex:1 1 300px;background:var(--navy);color:#fff;padding:24px;display:flex;flex-direction:column;gap:10px}
.btip .bkick{color:var(--yellow)}
.btip h2{margin:0;font-size:1.3rem;line-height:1.45}
.btip p{margin:0;color:#DCE1EC}
.btip a{margin-top:auto;color:var(--yellow)!important;font-weight:700}
.btip-n{font-size:.78rem;color:#B7C0D3!important}

/* 목차 + 표 */
.bdir{display:flex;flex-wrap:wrap;gap:22px;align-items:flex-start}
.bindex{flex:1 1 230px;background:var(--paper);border:2px solid var(--navy);padding:14px;position:sticky;top:84px;max-height:calc(100vh - 100px);overflow:auto}
.bindex-h{margin:4px 0 6px;font-weight:700;font-size:.82rem;color:var(--muted)}
.bindex ul{list-style:none;margin:0 0 10px;padding:0}
.bindex a{display:flex;align-items:center;padding:6px 8px;text-decoration:none;font-size:.94rem;border-left:4px solid transparent}
.bindex a:hover{background:var(--yellow);border-left-color:var(--navy)}
.bindex .cnt{margin-left:auto;font-family:"IBM Plex Mono",monospace;font-size:.75rem;color:var(--muted)}
.btables{flex:999 1 620px;min-width:0}
.bgroup-h{margin:0 0 10px;font-family:"IBM Plex Mono",monospace;font-size:.8rem;letter-spacing:.14em;color:var(--muted);border-bottom:1px dashed var(--gray);padding-bottom:4px}
.bnohit{background:var(--cream);border:2px solid var(--navy);padding:12px 16px;margin:0 0 14px}
.bnohit[hidden]{display:none}
.bcat{background:var(--paper);border:2px solid var(--navy);margin:0 0 20px;scroll-margin-top:84px}
.bcat-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:8px;padding:12px 18px;border-bottom:2px solid var(--navy)}
.bcat-head h2,.bcat-head h3{margin:0;font-size:1.2rem;font-weight:700}
.bcat-head .cnt{font-size:.82rem;font-weight:500;color:var(--muted);margin-left:4px}
.bcat-head a{font-size:.86rem;font-weight:700}
.btable{overflow-x:auto}
.brow{display:grid;grid-template-columns:42px minmax(0,1.05fr) minmax(0,1.7fr) minmax(0,1.15fr) 96px;gap:10px;align-items:center;padding:10px 18px;border-top:1px solid var(--line2);text-decoration:none;color:var(--navy)!important;min-width:600px}
a.brow:hover{background:var(--cream)}
.bhead{background:#EEF1F7;font-size:.74rem;font-weight:700;color:var(--muted)!important;border-top:0}
.brow .no{font-size:.8rem;color:var(--muted)}
.brow .nm{font-weight:700;font-size:.97rem}
.brow .nm em{font-style:normal;font-size:.68rem;font-weight:500;border:1px solid var(--gray);padding:0 5px;margin-left:4px;color:var(--muted)}
.brow .ft{font-size:.88rem;color:var(--body);line-height:1.5}
.brow .dm{font-size:.8rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bst{display:inline-block;font-size:.72rem;font-weight:700;border:1.5px solid var(--gray);color:var(--muted);padding:0 6px;margin-right:4px}
.bst-ok{border-color:#2E7D4F;color:#2E7D4F}
.bst-mv{border-color:#8A6D00;color:#8A6D00;background:var(--cream)}
.bst-blk{border-color:var(--navy2);color:var(--navy2)}
.bst-down{border-color:#B3261E;color:#B3261E}
.brow .st small{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--muted)}

/* 가이드·점검 */
.bguides{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:2px solid var(--navy);background:var(--paper);margin-bottom:44px}
.bguides a{display:flex;flex-direction:column;gap:6px;padding:20px;border-right:1px solid var(--line2);border-bottom:1px solid var(--line2);text-decoration:none;min-height:150px}
.bguides a:hover{background:var(--cream)}
.bguides .no{font-size:.8rem;font-weight:600;background:var(--yellow);padding:0 6px;align-self:flex-start}
.bguides b{font-size:1.06rem;line-height:1.4}
.bguides .ex{font-size:.88rem;color:var(--body)}
.blogbox{background:var(--paper);border:2px solid var(--navy);padding:18px 20px;margin-bottom:28px}
.blogbox dl{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));margin:0 0 12px;border:1px solid var(--line)}
.blogbox dl div{padding:10px 12px;border-right:1px solid var(--line)}
.blogbox dl div:last-child{border-right:0}
.blogbox dt{font-size:.74rem;color:var(--muted);font-family:"IBM Plex Mono",monospace}
.blogbox dd{margin:0;font-weight:700;font-size:1.1rem}
.blogbox p{margin:0 0 10px;color:var(--body)}
.blogbox a{font-weight:700}

/* 트렌드 */
.trends{background:var(--paper);border:2px solid var(--navy);padding:18px 20px}
.thead{display:flex;flex-wrap:wrap;justify-content:space-between;gap:6px;margin-bottom:8px;border-bottom:1px solid var(--line);padding-bottom:8px}
.live{font-size:.82rem;color:var(--muted);display:inline-flex;align-items:center;gap:6px}
.dot{width:8px;height:8px;background:var(--yellow);border:1.5px solid var(--navy);display:inline-block}
.trend-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 28px}
.trend-grid a{display:flex;align-items:center;gap:12px;padding:8px 0;border-bottom:1px dashed var(--line);text-decoration:none;min-width:0}
.trend-grid .kw{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rk{flex:none;width:24px;font-family:"IBM Plex Mono",monospace;font-weight:600}
.rk.top{background:var(--yellow);text-align:center}
.lead{color:var(--muted)}

/* FAQ */
.bfaq{border-top:2px solid var(--navy)}
.bfaq details{border-bottom:1px solid var(--line);background:rgba(255,255,255,.6)}
.bfaq summary{cursor:pointer;padding:15px 6px;font-weight:700;list-style:none;display:flex;gap:10px}
.bfaq summary::-webkit-details-marker{display:none}
.bfaq .q{flex:none;font-family:"IBM Plex Mono",monospace}
.bfaq details[open] summary{background:var(--cream)}
.bfaq .a{padding:6px 6px 16px 34px;color:var(--body)}

/* 분야·페이지 */
.bcrumb{font-size:.86rem;color:var(--muted);margin-bottom:14px;font-family:"IBM Plex Mono",monospace}
.bcrumb a{color:var(--muted)}
.bphead{margin-bottom:24px}
.bh1{font-size:2.2rem;line-height:1.3;margin:4px 0 10px;font-weight:700}
.btally{font-size:.9rem;color:var(--muted);margin:0}
.btally b{color:var(--navy)}
.bdate{font-size:.82rem;color:var(--muted);margin:0}
.bov{background:var(--paper);border:2px solid var(--navy);border-left:10px solid var(--yellow);padding:14px 20px;margin:24px 0 44px}
.bov p:last-child{margin:0}
.btbl{overflow-x:auto;-webkit-overflow-scrolling:touch;background:var(--paper);border:2px solid var(--navy);margin:0 0 16px}
.btbl table{width:100%;border-collapse:collapse;min-width:520px}
.btbl th,.btbl td{padding:10px 14px;border-bottom:1px solid var(--line2);text-align:left;vertical-align:top;font-size:.93rem}
.btbl thead th{background:var(--navy);color:#fff;font-weight:500;font-size:.84rem}
.btbl tr:last-child td{border-bottom:0}
.bprose h2{font-size:1.4rem;margin:32px 0 8px;font-weight:700;border-bottom:2px solid var(--navy);padding-bottom:4px}
.bprose h3{font-size:1.06rem;margin:20px 0 6px}
.bprose p,.bprose li{color:var(--body)}
.bprose ul,.bprose ol{padding-left:1.3em}
.bchk{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.bchk li{background:var(--paper);border:1.5px solid var(--line);padding:9px 12px}
.bchk li::before{content:"☐";margin-right:8px;font-weight:700}
.brel{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:36px}
.brel a{border:2px solid var(--navy);background:var(--paper);padding:6px 14px;text-decoration:none;font-weight:500;font-size:.92rem}
.brel a:hover{background:var(--yellow)}
.bempty{background:var(--paper);border:2px dashed var(--gray);padding:16px;color:var(--muted)}
.bpimg{display:block;width:100%;height:auto;margin:0 0 24px;border:2px solid var(--navy);background:var(--paper)}
.bguidehead{display:flex;flex-wrap:wrap;gap:24px;align-items:center;margin-bottom:26px}
.bguidehead>div{flex:999 1 420px;min-width:0}
.bguidehead img{flex:1 1 220px;max-width:300px;height:auto;border:2px solid var(--navy);background:var(--paper)}

/* 푸터 */
.bfoot{background:var(--navy);color:#DCE1EC;margin-top:30px}
.bfgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px;padding-top:36px;padding-bottom:20px}
.bfoot a{color:#E8ECF5}
.bfoot-brand{font-size:1.3rem;font-weight:700;color:#fff;margin:0 0 8px}
.bfcol p{margin:0 0 10px;font-size:.9rem}
.bfh{font-weight:700;color:var(--yellow)!important;font-family:"IBM Plex Mono",monospace;font-size:.82rem!important;letter-spacing:.12em}
.bfcol ul{list-style:none;margin:0;padding:0;display:grid;gap:4px;font-size:.9rem}
.bf2{grid-template-columns:1fr 1fr}
.bfmail{color:var(--yellow)}
.bcp{border-top:1px solid var(--navy2);padding-top:14px!important;padding-bottom:22px!important;margin:0 auto;font-size:.8rem;color:#B7C0D3}

/* 반응형 */
@media (max-width:980px){
  .bkit,.bguides{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bfgrid{grid-template-columns:1fr 1fr}
  .blogbox dl{grid-template-columns:repeat(3,minmax(0,1fr))}
  .bindex{position:static;max-height:none;flex-basis:100%}
  .bindex ul{display:flex;flex-wrap:wrap;gap:6px}
  .bindex li a{border:1.5px solid var(--line);border-left-width:1.5px}
  .bindex .cnt{margin-left:6px}
}
@media (max-width:880px){
  .bmbtn{display:block}
  .bnav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--paper);border-bottom:2px solid var(--navy);flex-direction:column;align-items:stretch;padding:8px 16px 16px;margin:0}
  .bnav.on{display:flex}
  .bdd-menu{position:static;min-width:0;box-shadow:none;border:0;border-left:3px solid var(--yellow);padding:0 0 6px 10px}
  .btop-in{position:relative}
}
@media (max-width:720px){
  .bhero{padding:30px 0 26px}
  .bhero h1{font-size:1.9rem}
  .bsec{font-size:1.45rem}
  .bh1{font-size:1.7rem}
  .bspec{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bspec>div:nth-child(2){border-right:0}
  .bspec>div:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .bkit,.bguides,.bchk,.bfgrid,.trend-grid{grid-template-columns:1fr}
  .blogbox dl{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bindex ul{display:flex;flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px}
  .bindex li{flex:none}
  .brow{grid-template-columns:34px minmax(0,1fr) auto;min-width:0;row-gap:2px}
  .brow .ft{grid-column:2 / 4;grid-row:2}
  .brow .dm{grid-column:2;grid-row:3}
  .brow .st{grid-column:3;grid-row:1}
  .bhead{display:none}
}
@media (max-width:420px){ .wrap{padding:0 16px} }