:root{
  --ink:#1E2A44;--pen:#2C4A7C;--pen2:#6D86B0;--paper:#fff;--mist:#EEF1F5;--mist2:#F6F8FA;--line:#D9DEE6;--muted:#5B6475;--marker:#F4E76E;
  --good:#1F7A4D;--goodbg:#E4F3EA;--bad:#B3261E;--badbg:#FBE9E7;--warn:#8A6100;--warnbg:#FBF3D5;
  --sans:"Pretendard Variable",Pretendard,-apple-system,system-ui,sans-serif;
  --serif:"Noto Serif KR",serif;
  --ease:cubic-bezier(.22,.8,.24,1);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.6;word-break:keep-all;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
a{color:inherit}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--pen);outline-offset:2px;border-radius:6px}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px;width:100%}
.muted{color:var(--muted)}
small.muted{font-size:13px}

/* 헤더 */
.top{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.top .wrap{height:60px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{font-weight:800;text-decoration:none;letter-spacing:-.02em;white-space:nowrap}
.brand small{color:var(--muted);font-weight:500;margin-left:6px}
.who{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted);white-space:nowrap}
.who b{color:var(--ink)}
.linkbtn{font-size:13px;color:var(--muted);text-decoration:underline;text-underline-offset:3px}
.linkbtn:hover{color:var(--ink)}
main{flex:1;padding:36px 0 80px}
.view{opacity:0;transform:translateY(12px)}
.view.enter{opacity:1;transform:none;transition:opacity .45s var(--ease),transform .45s var(--ease)}
.stagger>*{opacity:0;transform:translateY(10px);animation:up .55s var(--ease) forwards}
.stagger>*:nth-child(2){animation-delay:.04s}.stagger>*:nth-child(3){animation-delay:.08s}.stagger>*:nth-child(4){animation-delay:.12s}.stagger>*:nth-child(5){animation-delay:.16s}.stagger>*:nth-child(6){animation-delay:.2s}.stagger>*:nth-child(n+7){animation-delay:.24s}
@keyframes up{to{opacity:1;transform:none}}
@keyframes pop{0%{transform:scale(.6);opacity:0}70%{transform:scale(1.08)}100%{transform:none;opacity:1}}
h1.title{font-size:clamp(26px,3.6vw,38px);letter-spacing:-.04em;line-height:1.2}
h2.h2{font-size:20px;letter-spacing:-.03em;margin-bottom:14px}
.sub{color:var(--muted);margin-top:6px}

/* 버튼, 폼 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:999px;background:var(--ink);color:#fff;font-weight:600;font-size:14px;text-decoration:none;position:relative;overflow:hidden;transition:transform .2s,opacity .2s;white-space:nowrap}
.btn::after{content:"";position:absolute;inset:0;background:var(--pen);transform:translateY(101%);transition:transform .35s var(--ease)}
.btn>*{position:relative;z-index:1}
.btn:hover::after{transform:none}
.btn:active{transform:scale(.97)}
.btn[disabled]{opacity:.4;pointer-events:none}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}
.btn.ghost::after{background:var(--mist)}
.btn.light{background:#fff;color:var(--ink)}
.btn.light::after{background:var(--marker)}
.btn.danger{background:var(--bad)}
.btn.danger::after{background:#8C1D18}
.btn.sm{height:34px;padding:0 14px;font-size:13px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.field>label,.flabel{font-size:13px;font-weight:600}
.hint{font-size:12px;color:var(--muted)}
.input{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 13px;background:#fff;font-size:15px;transition:border-color .2s,box-shadow .2s}
.input:focus{outline:none;border-color:var(--pen);box-shadow:0 0 0 3px rgba(44,74,124,.15)}
textarea.input{min-height:110px;resize:vertical;line-height:1.6}
textarea.input.tall{min-height:260px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.row3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.err{color:var(--bad);font-size:13px;min-height:20px}
.check{display:flex;align-items:center;gap:8px;font-size:14px;cursor:pointer}
.check input{width:18px;height:18px;accent-color:var(--pen)}
.empty{padding:48px 24px;text-align:center;border:1px dashed var(--line);border-radius:16px;color:var(--muted)}
.empty b{display:block;color:var(--ink);font-size:17px;margin-bottom:6px}
.empty.sm{padding:30px 20px}
.badge{display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:600;padding:3px 9px;border-radius:999px;background:var(--mist);color:var(--muted);white-space:nowrap}
.badge.blue{background:#E1E8F4;color:var(--pen)}
.badge.yellow{background:var(--warnbg);color:var(--warn)}
.badge.green{background:var(--goodbg);color:var(--good)}
.badge.red{background:var(--badbg);color:var(--bad)}
.banner{display:flex;align-items:center;gap:8px;padding:12px 16px;border-radius:12px;background:var(--mist);margin:16px 0;font-size:14px;animation:up .4s var(--ease)}
.banner.good{background:var(--goodbg);color:var(--good);font-weight:600}
.okline{display:inline-flex;align-items:center;gap:6px;color:var(--good);font-weight:600}
.spin{width:26px;height:26px;border:3px solid var(--mist);border-top-color:var(--pen);border-radius:50%;animation:rot .8s linear infinite;margin:60px auto}
@keyframes rot{to{transform:rotate(360deg)}}
.demo-note{background:var(--warnbg);color:var(--warn);font-size:13px;padding:8px 12px;border-radius:10px;margin-bottom:16px}

/* 본문 서식 */
.prose{font-size:16px;line-height:1.85;color:#333D52;max-width:44em}
.prose h3{font-size:20px;color:var(--ink);margin:26px 0 8px;letter-spacing:-.02em}
.prose h4{font-size:17px;color:var(--ink);margin:20px 0 6px}
.prose p{margin:0 0 14px}
.prose ul{margin:0 0 14px 20px}
.prose li{margin:4px 0}
.prose blockquote{border-left:3px solid var(--marker);padding:4px 0 4px 14px;margin:0 0 14px;font-family:var(--serif)}
.prose a{color:var(--pen)}
.reading{font-family:var(--serif);font-size:17px}

/* 로그인 */
.login{max-width:420px;margin:20px auto 0}
.card{border:1px solid var(--line);border-radius:18px;padding:28px;margin-top:24px}

/* 홈 */
.course-list{margin-top:32px;border-top:1px solid var(--line)}
.course-row{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center;padding:24px 4px;border-bottom:1px solid var(--line);text-decoration:none;position:relative}
.course-row::before{content:"";position:absolute;left:0;bottom:-1px;height:2px;width:100%;background:var(--pen);transform:scaleX(0);transform-origin:0;transition:transform .5s var(--ease)}
.course-row:hover::before{transform:none}
.course-row h2{font-size:22px;letter-spacing:-.03em}
.course-row p{color:var(--muted);font-size:14px;margin-top:4px}
.go{width:44px;height:44px;border-radius:50%;background:var(--mist);display:grid;place-items:center;transition:transform .4s var(--ease),background .3s}
.course-row:hover .go{transform:translateX(4px);background:var(--marker)}

/* 강의 레이아웃 */
.cshell{display:grid;grid-template-columns:230px minmax(0,1fr);gap:48px;align-items:start}
.cnav{position:sticky;top:84px;display:flex;flex-direction:column;border-right:1px solid var(--line);padding-right:16px}
.cnav-title{font-weight:700;font-size:15px;line-height:1.4;padding:0 12px 14px;border-bottom:1px solid var(--line);margin-bottom:10px}
.cnav a{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:9px 12px;border-radius:10px;text-decoration:none;font-size:15px;font-weight:600;color:var(--muted);transition:background .2s,color .2s;position:relative}
.cnav a.sub{padding-left:26px;font-weight:500}
.cnav a:hover{background:var(--mist2);color:var(--ink)}
.cnav a.on{background:var(--mist);color:var(--ink)}
.cnav a.on::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:2px;background:var(--pen)}
.cnav .mini{width:26px;height:4px;border-radius:2px;background:var(--line);overflow:hidden;flex:0 0 26px}
.cnav .mini i{display:block;height:100%;background:var(--pen)}
@media (max-width:900px){
  .cshell{grid-template-columns:minmax(0,1fr);gap:20px}
  .cnav{position:sticky;top:60px;z-index:30;flex-direction:row;overflow-x:auto;border-right:0;border-bottom:1px solid var(--line);padding:8px 0;margin:-20px -24px 0;padding-left:16px;padding-right:16px;background:rgba(255,255,255,.95);scrollbar-width:none}
  .cnav::-webkit-scrollbar{display:none}
  .cnav-title{display:none}
  .cnav a,.cnav a.sub{padding:7px 12px;white-space:nowrap;font-size:14px}
  .cnav a.on::before{left:12px;right:12px;top:auto;bottom:0;width:auto;height:2px}
  .cnav .mini{display:none}
}

/* 개요 */
.hello{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;padding:28px;border-radius:20px;background:var(--ink);color:#fff;position:relative;overflow:hidden}
.hello::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;border:36px solid rgba(255,255,255,.05);animation:drift 12s ease-in-out infinite}
@keyframes drift{50%{transform:translate(-20px,20px)}}
.hello h1{font-size:clamp(22px,3vw,30px);letter-spacing:-.03em;line-height:1.3}
.hello p{color:#C3CCDD;margin-top:6px}
.hello .next{margin-top:18px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.hello .next small{color:#C3CCDD}
.ring-box{position:relative;width:96px;height:96px}
.ring-box b{position:absolute;inset:0;display:grid;place-items:center;font-size:20px}
.ring{transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:8}
.ring .rb{stroke:rgba(255,255,255,.14)}
.ring .rf{stroke:var(--marker);stroke-linecap:round;transition:stroke-dashoffset 1.4s var(--ease)}
.ov-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:28px;margin-top:28px}
.panel{border:1px solid var(--line);border-radius:16px;padding:22px}
.panel h2{font-size:16px;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center}
.annc{padding:12px 0;border-top:1px solid var(--mist)}
.annc:first-of-type{border-top:0}
.annc b{display:flex;gap:6px;align-items:center}
.annc p{color:var(--muted);font-size:14px;margin-top:4px;white-space:pre-wrap}
.dl-row{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:10px 0;border-top:1px solid var(--mist);text-decoration:none}
.dl-row:first-of-type{border-top:0}
.dl-row .t{font-size:14px;font-weight:600}
.wk-row{display:grid;grid-template-columns:62px 1fr 44px;gap:12px;align-items:center;padding:9px 0;text-decoration:none;font-size:14px}
.wk-row .bar{height:8px;border-radius:4px;background:var(--mist);overflow:hidden}
.wk-row .bar i{display:block;height:100%;width:0;background:var(--pen);border-radius:4px;transition:width 1.1s var(--ease)}
.wk-row b{text-align:right;font-variant-numeric:tabular-nums}
@media (max-width:900px){.ov-grid{grid-template-columns:1fr}.hello{grid-template-columns:1fr}.ring-box{width:80px;height:80px}}

/* 주차 */
.week-head{padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:10px}
.week-head .wno{font-size:14px;font-weight:700;color:var(--pen)}
.week-head h1{margin-top:4px}
.lockbox{display:flex;gap:14px;align-items:center;padding:22px;border-radius:16px;background:var(--mist);margin-top:20px}
.lockbox svg{flex:0 0 auto}
.irow{display:grid;grid-template-columns:34px minmax(0,1fr) auto;gap:14px;align-items:center;padding:15px 14px;border-radius:12px;text-decoration:none;transition:background .2s;position:relative}
.irow:hover{background:var(--mist2)}
.irow.next{background:var(--mist)}
.ir-ic{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;color:var(--pen);background:#fff;box-shadow:inset 0 0 0 1.5px var(--line);transition:all .3s}
.irow.done .ir-ic{background:var(--pen);color:#fff;box-shadow:none}
.irow.part .ir-ic{box-shadow:inset 0 0 0 2px var(--pen)}
.irow.dim{opacity:.55}
.ir-t{font-size:16px}
.ir-t b{font-weight:700}
.ir-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:4px;align-items:center;font-size:13px;color:var(--muted)}
@media (max-width:600px){.irow{grid-template-columns:30px minmax(0,1fr)}.irow>.btn,.irow>.ir-end{grid-column:2;justify-self:start}}

/* 항목 플레이어 */
.player{display:grid;grid-template-columns:290px minmax(0,1fr);gap:40px;align-items:start}
.plist{position:sticky;top:84px;border:1px solid var(--line);border-radius:16px;overflow:hidden;max-height:calc(100vh - 110px);display:flex;flex-direction:column}
.plist-h{padding:16px;border-bottom:1px solid var(--line)}
.plist-h a{display:inline-flex;align-items:center;gap:6px;font-weight:700;text-decoration:none;font-size:14px}
.plist-h small{display:block;color:var(--muted);margin-top:6px}
.plist-b{overflow:auto;padding:6px}
.pi{display:grid;grid-template-columns:24px 1fr auto;gap:10px;align-items:start;padding:10px;border-radius:10px;text-decoration:none;font-size:14px;line-height:1.45}
.pi:hover{background:var(--mist2)}
.pi.cur{background:var(--mist)}
.pi.cur .pt{font-weight:700}
.pi .pic{color:var(--pen);margin-top:1px}
.pi.done .pic{color:var(--good)}
.pi small{color:var(--muted);white-space:nowrap}
.pi .pk{display:block;font-size:12px;color:var(--muted)}
.plist-f{display:flex;border-top:1px solid var(--line)}
.plist-f a,.plist-f span{flex:1;text-align:center;padding:12px;font-size:13px;color:var(--muted);text-decoration:none}
.plist-f a:hover{background:var(--mist2);color:var(--ink)}
.plist-f>*+*{border-left:1px solid var(--line)}
.plt{display:none}
.pmeta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:var(--pen);font-size:14px;font-weight:700}
.pmeta .muted{font-weight:500}
.pmain>h1{font-size:clamp(24px,3vw,32px);letter-spacing:-.035em;line-height:1.3;margin:6px 0 22px}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:40px;padding-top:22px;border-top:1px solid var(--line)}
@media (max-width:900px){
  .player{grid-template-columns:minmax(0,1fr);gap:18px}
  .plist{position:static;max-height:none}
  .plist .plist-b,.plist .plist-f{display:none}
  .plist.open .plist-b,.plist.open .plist-f{display:flex}
  .plist.open .plist-b{flex-direction:column}
  .plt{display:inline-flex;margin-top:10px}
  .row3{grid-template-columns:1fr}
}
@media (max-width:600px){.row2{grid-template-columns:1fr}}

/* 동영상 */
.video{position:relative;aspect-ratio:16/9;background:var(--ink);border-radius:16px;overflow:hidden}
.video iframe,.video>#player{position:absolute;inset:0;width:100%;height:100%;border:0}
.novid{position:absolute;inset:0;display:grid;place-items:center;color:#AEB8CC;text-align:center;padding:20px}
.vq{position:absolute;inset:0;background:rgba(255,255,255,.97);z-index:5;display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;transition:opacity .25s;overflow:auto}
.vq.show{opacity:1}
.vq-in{width:100%;max-width:520px;transform:translateY(10px);transition:transform .35s var(--ease)}
.vq.show .vq-in{transform:none}
.vq-tag{font-size:12px;font-weight:700;color:var(--pen)}
.vq-q{font-weight:700;font-size:17px;margin:4px 0 12px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.vq-act{display:flex;justify-content:flex-end;align-items:center;gap:14px;margin-top:12px}
.vq-res{min-height:22px;font-size:14px;margin-top:6px}
.good{color:var(--good)}.bad{color:var(--bad)}
.vbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:12px 0 20px;font-size:13px;color:var(--muted);min-height:34px;flex-wrap:wrap}
.opt{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:10px;cursor:pointer;transition:background .15s;font-size:15px}
.opt:hover{background:var(--mist2)}
.opt input{margin-top:5px;accent-color:var(--pen);width:16px;height:16px;flex:0 0 auto}
@media (max-width:600px){.vq{position:static;opacity:1;border-radius:0 0 16px 16px;padding:18px;border:1px solid var(--line)}.video.hasq{aspect-ratio:auto}.video.hasq>#player,.video.hasq>iframe{position:relative;aspect-ratio:16/9;height:auto}}

/* 퀴즈 */
.qsum{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:14px;margin:18px 0}
.qsum div{padding:14px 16px}
.qsum div+div{border-left:1px solid var(--line)}
.qsum small{display:block;color:var(--muted);font-size:12px}
.qsum b{font-size:18px}
@media (max-width:600px){.qsum{grid-template-columns:1fr 1fr}.qsum div:nth-child(3){border-left:0}.qsum div:nth-child(n+3){border-top:1px solid var(--line)}}
.qq{border:0;padding:20px 0;border-top:1px solid var(--line)}
.qq legend{font-weight:700;font-size:16px;margin-bottom:10px;display:flex;gap:10px;align-items:baseline;padding:0}
.qq legend small{font-weight:500;color:var(--muted)}
.qn{flex:0 0 26px;height:26px;border-radius:50%;background:var(--mist);display:inline-grid;place-items:center;font-size:13px}
.qres{display:flex;gap:24px;align-items:center;padding:24px;border-radius:18px;margin-bottom:20px}
.qres.pass{background:var(--goodbg)}
.qres.fail{background:var(--warnbg)}
.qres .big{font-size:64px;font-weight:800;letter-spacing:-.05em;line-height:1;font-variant-numeric:tabular-nums;animation:pop .6s var(--ease)}
.qres .big small{font-size:18px}
.qres b{font-size:18px}
.qres p{color:var(--muted);margin-top:4px}
.qr{padding:14px 0;border-top:1px solid var(--line)}
.qr-h{display:flex;gap:8px;align-items:flex-start}
.qr.good .qr-h svg{color:var(--good)}
.qr.bad .qr-h svg{color:var(--bad)}
.qr-h svg{flex:0 0 auto;margin-top:3px}
.qr-b{font-size:14px;color:var(--muted);margin:4px 0 0 24px}

/* 과제 */
.rubric{border:1px solid var(--line);border-radius:14px;margin:18px 0;overflow:hidden}
.rubric summary{padding:14px 16px;cursor:pointer;font-weight:600;font-size:14px;list-style:none;display:flex;justify-content:space-between}
.rubric summary::after{content:"+";font-weight:400;font-size:18px;line-height:1;transition:transform .3s}
.rubric[open] summary::after{transform:rotate(45deg)}
.rubric table{border-top:1px solid var(--line)}
.work{margin-top:24px;border:1px solid var(--line);border-radius:18px;padding:24px;position:relative;overflow:hidden}
.work::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--marker)}
.work h2{font-size:17px;margin-bottom:14px}
.wview{background:var(--mist2);border-radius:12px;padding:16px;margin-bottom:14px}
.wview .c{white-space:pre-wrap;margin-top:8px}
.wview a{color:var(--pen);word-break:break-all}
.gview{border-radius:12px;padding:16px;margin-bottom:14px;background:#EDF2FA;animation:up .5s var(--ease)}
.gview .tot{font-size:28px;font-weight:800;letter-spacing:-.03em}
.gline{display:grid;grid-template-columns:1fr auto;gap:10px;font-size:14px;padding:5px 0;border-top:1px solid rgba(44,74,124,.12)}
.fb{margin-top:10px;border-left:3px solid var(--pen);padding:2px 0 2px 12px;white-space:pre-wrap}
.steps3{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:6px 0 20px}
.steps3 .s{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--muted);padding:10px 12px;border-radius:12px;background:var(--mist2)}
.steps3 .s i{flex:0 0 24px;height:24px;border-radius:50%;display:grid;place-items:center;background:#fff;font-style:normal;box-shadow:inset 0 0 0 1.5px var(--line);font-size:12px}
.steps3 .s.done{color:var(--good);background:var(--goodbg)}
.steps3 .s.done i{background:var(--good);color:#fff;box-shadow:none;animation:pop .5s var(--ease)}
@media (max-width:600px){.steps3{grid-template-columns:1fr}}
.ptabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:20px;overflow-x:auto}
.ptab{padding:10px 14px;font-weight:600;font-size:14px;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap;transition:color .2s,border-color .3s}
.ptab.on{color:var(--ink);border-color:var(--ink)}
.peerbox{border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:18px;animation:up .45s var(--ease)}
.peerbox .ph{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.rs{padding:12px 0;border-top:1px solid var(--mist)}
.rs-h{display:flex;justify-content:space-between;gap:10px;margin-bottom:8px;font-size:14px}
.pips{display:flex;gap:6px;flex-wrap:wrap}
.pips button{min-width:38px;height:38px;border-radius:10px;box-shadow:inset 0 0 0 1px var(--line);font-weight:600;transition:all .2s}
.pips button:hover{background:var(--mist)}
.pips button.on{background:var(--pen);color:#fff;box-shadow:none}
.pips button.sel{transform:scale(1.08)}
.revcard{border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:10px}

/* 실습 */
.pbar{height:8px;border-radius:4px;background:var(--mist);overflow:hidden;margin:20px 0 6px}
.pbar i{display:block;height:100%;background:var(--pen);border-radius:4px;transition:width .6s var(--ease)}
.checklist{list-style:none;margin:14px 0 20px}
.ck{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;border-radius:12px;cursor:pointer;transition:background .2s}
.ck:hover{background:var(--mist2)}
.ck input{position:absolute;opacity:0;width:1px;height:1px}
.ck .box{flex:0 0 24px;height:24px;border-radius:7px;box-shadow:inset 0 0 0 1.5px var(--line);display:grid;place-items:center;color:transparent;transition:all .25s var(--ease)}
.ck.on .box{background:var(--pen);color:#fff;box-shadow:none;transform:scale(1.05)}
.ck.on .box svg{animation:pop .35s var(--ease)}
.ck.on .ct{color:var(--muted);text-decoration:line-through;text-decoration-color:var(--pen2)}
.ck input:focus-visible+.box{outline:2px solid var(--pen);outline-offset:2px}

/* 라이브 */
.livecard{display:grid;grid-template-columns:1fr auto auto;gap:20px;align-items:center;padding:24px;border-radius:18px;background:var(--ink);color:#fff}
.livecard small{display:block;color:#AEB8CC;font-size:12px}
.livecard b{font-size:20px}
.cd{display:flex;gap:10px;font-variant-numeric:tabular-nums}
.cd div{text-align:center;min-width:46px}
.cd b{display:block;font-size:26px;line-height:1.1}
.cd small{font-size:11px}
.onair{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--marker)}
.onair i{width:9px;height:9px;border-radius:50%;background:#FF5A4E;animation:blink 1.2s infinite}
@keyframes blink{50%{opacity:.3}}
@media (max-width:700px){.livecard{grid-template-columns:1fr}}
.attend{margin:28px 0}
.codein{display:flex;gap:8px;max-width:360px;margin-top:10px}
.codein .input{font-size:20px;letter-spacing:.3em;text-align:center;font-weight:700}
.burst{position:relative}
.burst i{position:absolute;left:50%;top:50%;width:7px;height:7px;border-radius:2px;animation:burst .8s var(--ease) forwards}
@keyframes burst{to{transform:translate(var(--x),var(--y)) rotate(200deg);opacity:0}}

/* 토론 */
.composer{margin:18px 0 26px}
.post{display:grid;grid-template-columns:38px 1fr;gap:12px;padding:16px 0;border-top:1px solid var(--line);animation:up .4s var(--ease)}
.post .post{border-top:0;padding:12px 0 0}
.av{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;font-size:15px}
.post .post .av{width:30px;height:30px;font-size:13px}
.post-h{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:14px}
.post-h small{color:var(--muted)}
.post-b{white-space:pre-wrap;margin-top:4px}
.post-a{margin-top:6px;display:flex;gap:12px}
.replybox{margin-top:10px;display:flex;flex-direction:column;gap:8px}
.replybox textarea{min-height:70px}

/* 성적 */
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:22px 0}
.kpi{border:1px solid var(--line);border-radius:16px;padding:18px}
.kpi small{color:var(--muted);font-size:13px;display:block}
.kpi b{font-size:30px;letter-spacing:-.04em;font-variant-numeric:tabular-nums;line-height:1.3}
.kpi b small{display:inline;font-size:14px;letter-spacing:0}
.kpi.hot{background:var(--ink);color:#fff;border-color:var(--ink)}
.kpi.hot small{color:#AEB8CC}
@media (max-width:800px){.kpis{grid-template-columns:1fr 1fr}}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
th{font-size:12px;color:var(--muted);font-weight:600;background:var(--mist2)}
.scroll{overflow-x:auto;border:1px solid var(--line);border-radius:14px}
.scroll table tr:last-child td{border-bottom:0}
@media (max-width:700px){.scroll table{min-width:580px}}
td a{color:var(--pen)}

/* 수료증 */
.cert{max-width:760px;margin:10px auto;aspect-ratio:1.414;background:#fff;border:1px solid var(--line);border-radius:6px;padding:7%;position:relative;display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 30px 60px -30px rgba(30,42,68,.35);animation:certin 1s var(--ease)}
@keyframes certin{from{opacity:0;transform:translateY(30px) rotate(-1deg)}}
.cert::before{content:"";position:absolute;inset:14px;border:1px solid var(--pen2);pointer-events:none}
.cert .ct1{font-family:var(--serif);font-size:clamp(13px,1.6vw,15px);color:var(--muted)}
.cert .cname{font-family:var(--serif);font-weight:700;font-size:clamp(34px,6vw,58px);letter-spacing:-.02em;margin:6px 0}
.cert .ctext{font-family:var(--serif);font-size:clamp(14px,1.8vw,17px);line-height:1.9;max-width:28em}
.cert .cfoot{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;font-size:13px}
.cert .seal{width:clamp(70px,11vw,96px);aspect-ratio:1;border-radius:50%;border:2px solid var(--pen);color:var(--pen);display:grid;place-items:center;text-align:center;font-weight:800;font-size:clamp(10px,1.3vw,12px);line-height:1.3;transform:rotate(-12deg);animation:stamp .6s .7s cubic-bezier(.5,1.8,.5,1) both}
@keyframes stamp{from{transform:scale(2.2) rotate(-30deg);opacity:0}}
@media print{
  body *{visibility:hidden}
  .cert,.cert *{visibility:visible}
  .cert{position:fixed;left:0;top:0;width:100%;margin:0;box-shadow:none;border:0}
}

/* 관리자 */
.a-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin-bottom:20px}
.a-head .ctr{display:flex;gap:8px;flex-wrap:wrap}
.a-head select{min-width:220px;width:auto}
.tabs{display:flex;gap:2px;border-bottom:1px solid var(--line);overflow-x:auto;position:relative;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{padding:12px 13px;font-size:14px;font-weight:600;color:var(--muted);white-space:nowrap;transition:color .2s;display:flex;gap:6px;align-items:center}
.tab.on{color:var(--ink)}
.tab .cnt{background:var(--bad);color:#fff;font-size:11px;border-radius:999px;padding:0 6px;line-height:18px}
.tab-ind{position:absolute;bottom:0;height:2px;background:var(--ink);transition:left .35s var(--ease),width .35s var(--ease)}
.pane{padding-top:26px}
.pane-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px;flex-wrap:wrap}
.pane-head p{color:var(--muted);font-size:14px;max-width:48em}
.a-week{border:1px solid var(--line);border-radius:16px;margin-bottom:16px;overflow:hidden}
.a-week-h{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;background:var(--mist2);flex-wrap:wrap}
.a-week-h b{font-size:15px}
.a-week-h small{color:var(--muted);margin-left:8px}
.a-item{display:grid;grid-template-columns:36px minmax(0,1fr) auto;gap:12px;align-items:center;padding:12px 16px;border-top:1px solid var(--line);transition:background .2s}
.a-item:hover{background:var(--mist2)}
.a-item .ic{width:36px;height:36px;border-radius:10px;background:var(--mist);display:grid;place-items:center;color:var(--pen)}
.a-item .t{font-weight:600}
.a-item .meta{display:flex;gap:6px;margin-top:3px;flex-wrap:wrap}
.a-add{display:flex;justify-content:center;padding:10px;border-top:1px solid var(--line)}
.acts{display:flex;gap:2px}
.ib{width:32px;height:32px;border-radius:8px;display:grid;place-items:center;color:var(--muted);transition:background .2s,color .2s}
.ib:hover{background:var(--mist);color:var(--ink)}
.ib.del:hover{background:var(--badbg);color:var(--bad)}
.ib[disabled]{opacity:.25;pointer-events:none}
@media (max-width:700px){.a-item{grid-template-columns:36px minmax(0,1fr)}.a-item .acts{grid-column:2}}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;align-items:start}
.grid2>*{min-width:0}
.scroll{max-width:100%}
.box{border:1px solid var(--line);border-radius:16px;padding:20px}
.box h3{font-size:15px;margin-bottom:14px}
@media (max-width:900px){.grid2{grid-template-columns:minmax(0,1fr)}}
.typegrid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.tcard{text-align:left;border:1px solid var(--line);border-radius:14px;padding:16px;display:grid;grid-template-columns:40px 1fr;gap:12px;transition:border-color .2s,transform .25s var(--ease),box-shadow .25s}
.tcard:hover{border-color:var(--pen);transform:translateY(-2px);box-shadow:0 10px 24px -14px rgba(30,42,68,.4)}
.tcard .ic{width:40px;height:40px;border-radius:12px;background:var(--mist);display:grid;place-items:center;color:var(--pen)}
.tcard b{display:block;font-size:15px}
.tcard small{color:var(--muted);font-size:13px;line-height:1.45;display:block;margin-top:2px}
@media (max-width:600px){.typegrid{grid-template-columns:1fr}}
.bsec{border-top:1px solid var(--line);padding-top:18px;margin-top:6px}
.bsec>.flabel{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.qcard{border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:10px;background:var(--mist2);animation:up .35s var(--ease)}
.qcard-h{display:flex;gap:8px;align-items:center;margin-bottom:10px}
.qcard-h .qn{background:#fff}
.qcard-h select{width:auto}
.qcard-h .sp{flex:1}
.orow{display:grid;grid-template-columns:28px 1fr 32px;gap:6px;align-items:center;margin-bottom:6px}
.orow input[type=radio],.orow input[type=checkbox]{width:18px;height:18px;accent-color:var(--good);justify-self:center}
.crow{display:grid;grid-template-columns:1fr 90px 32px;gap:6px;align-items:center;margin-bottom:6px}
.cprow{display:grid;grid-template-columns:80px 1fr 32px;gap:8px;border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:8px;background:var(--mist2)}
.cprow .full{grid-column:2/3}
.preview{aspect-ratio:16/9;background:var(--mist);border-radius:12px;overflow:hidden;position:relative;margin-top:8px;display:grid;place-items:center;color:var(--muted);font-size:13px;text-align:center;padding:10px}
.preview iframe{position:absolute;inset:0;width:100%;height:100%;border:0;animation:up .4s}
.codebig{font-size:44px;font-weight:800;letter-spacing:.25em;font-variant-numeric:tabular-nums;color:var(--pen)}
.chart{display:flex;align-items:flex-end;gap:14px;height:180px;padding:10px 4px 0;border-bottom:1px solid var(--line)}
.chart .col{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;gap:6px}
.chart .col i{width:100%;max-width:56px;background:linear-gradient(var(--pen),var(--pen2));border-radius:8px 8px 2px 2px;height:0;transition:height 1.1s var(--ease)}
.chart .col b{font-size:13px}
.chart-l{display:flex;gap:14px;padding:6px 4px 0}
.chart-l span{flex:1;text-align:center;font-size:12px;color:var(--muted)}
.feed-row{display:grid;grid-template-columns:30px 1fr;gap:10px;padding:10px 0;border-top:1px solid var(--mist);font-size:14px}
.feed-row:first-child{border-top:0}
.feed-row .av{width:30px;height:30px;font-size:12px}
.feed-row small{color:var(--muted);display:block}
.qstat{padding:12px 0;border-top:1px solid var(--mist)}
.qstat .bar{height:10px;border-radius:5px;background:var(--mist);overflow:hidden;margin-top:6px}
.qstat .bar i{display:block;height:100%;border-radius:5px;transition:width 1s var(--ease);width:0}
.dot{display:inline-block;width:14px;height:14px;border-radius:50%;border:2px solid var(--line)}
.dot.done{background:var(--pen);border-color:var(--pen)}
.dot.part{border-color:var(--pen);background:linear-gradient(90deg,var(--pen) 50%,transparent 50%)}
.matrix td,.matrix th{text-align:center;white-space:nowrap}
.matrix td:first-child,.matrix th:first-child{text-align:left;position:sticky;left:0;background:#fff;z-index:1}
.matrix th:first-child{background:var(--mist2)}
.matrix th{font-weight:600;line-height:1.35}
.legend{display:flex;gap:16px;font-size:13px;color:var(--muted);margin-bottom:12px;flex-wrap:wrap}
.legend span{display:inline-flex;align-items:center;gap:6px}
.sub-card{border:1px solid var(--line);border-radius:16px;padding:18px;margin-bottom:12px}
.sub-card .h{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;align-items:center}
.gradein{display:grid;grid-template-columns:1fr 110px;gap:8px;align-items:center;padding:6px 0;font-size:14px}
.gradein input{text-align:right}

/* 모달, 토스트 */
.modal-bg{position:fixed;inset:0;background:rgba(30,42,68,.42);display:grid;place-items:center;padding:16px;z-index:100;opacity:0;transition:opacity .25s}
.modal-bg.show{opacity:1}
.modal{background:#fff;border-radius:20px;padding:26px;width:100%;max-width:460px;max-height:calc(100vh - 32px);overflow:auto;transform:translateY(16px) scale(.97);transition:transform .35s var(--ease)}
.modal.wide{max-width:760px}
.modal-bg.show .modal{transform:none}
.modal h3{font-size:20px;letter-spacing:-.02em;margin-bottom:18px;display:flex;align-items:center;gap:10px}
.modal h3 .ic{width:34px;height:34px;border-radius:10px;background:var(--mist);display:grid;place-items:center;color:var(--pen)}
.m-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:18px;position:sticky;bottom:-26px;background:#fff;padding:12px 0 2px}
.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:var(--ink);color:#fff;padding:12px 20px;border-radius:999px;font-size:14px;font-weight:600;z-index:200;opacity:0;transition:all .35s var(--ease);max-width:calc(100% - 32px);text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}

footer{border-top:1px solid var(--line);padding:22px 0;font-size:13px;color:var(--muted)}
footer .wrap{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
footer a{color:var(--muted)}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001s!important;animation-delay:0s!important;transition-duration:.001s!important}}

/* 본문 이미지 */
.mdimg{max-width:100%;height:auto;border-radius:12px;margin:12px 0;display:block;background:var(--mist2)}
.prose .mdimg+br{display:none}
/* 수료증 버튼 */
.certacts{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:22px}
@media print{.certacts,.hint{display:none!important}}
/* 글 수정 상자 */
.editbox{margin-top:8px}
.post-b[hidden]{display:none}
/* 알림 패널 */
#notifb .btn{min-width:130px}

/* 전체 화면 순간 연출 */
.ovl{position:fixed;inset:0;z-index:150;background:rgba(30,42,68,.96);display:grid;place-items:center;padding:24px;opacity:0;transition:opacity .4s var(--ease);overflow:auto}
.ovl.show{opacity:1}
.ovl-card{max-width:520px;width:100%;color:#fff;transform:translateY(18px);transition:transform .55s var(--ease)}
.ovl.show .ovl-card{transform:none}
.ovl-card.center{text-align:center}
.ovl-eyebrow{font-size:13px;color:var(--marker);font-weight:700;letter-spacing:.02em}
.ovl-card h2{font-size:clamp(26px,5vw,38px);letter-spacing:-.04em;line-height:1.3;margin:10px 0 10px}
.ovl-card p{color:#C3CCDD;line-height:1.7}
.ovl-card .pbar{background:rgba(255,255,255,.16);margin:22px auto 8px;max-width:320px}
.ovl-card .pbar i{background:var(--marker)}
.ovl-weeks{list-style:none;margin:26px 0;border-top:1px solid rgba(255,255,255,.16)}
.ovl-weeks li{display:grid;grid-template-columns:64px 1fr;gap:12px;padding:13px 4px;border-bottom:1px solid rgba(255,255,255,.16);opacity:0;transform:translateX(-10px);animation:slidein .55s var(--ease) forwards;animation-delay:var(--d)}
@keyframes slidein{to{opacity:1;transform:none}}
.ovl-weeks b{color:var(--marker);font-size:14px}
.ovl-weeks span{color:#E6EAF2}
.ovl-foot{font-family:var(--serif);margin-bottom:24px}
.ovl-stamp{width:140px;height:140px;margin:0 auto 24px;border:3px solid var(--marker);color:var(--marker);border-radius:50%;display:grid;place-items:center;font-weight:800;font-size:17px;line-height:1.35;position:relative;animation:stampin .75s cubic-bezier(.4,1.7,.5,1) both}
@keyframes stampin{from{transform:scale(2.4) rotate(-35deg);opacity:0}to{transform:scale(1) rotate(-10deg);opacity:1}}
.ovl .certacts{margin-top:18px}

/* 띄어쓰기 없이 길게 쓴 글도 잘리지 않게 */
.wview .c,.post-b,.prose,.prose p,.prose li,.ir-t,.sub-card .c,.gline span,.qr-b,.fb,.peerbox,.revcard,.annc p,td,.submitted .c{overflow-wrap:anywhere}

/* 이름이 아주 길어도 상단 바가 밀리지 않게 */
.who{max-width:62%;overflow:hidden}
.who b{display:inline-block;max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;vertical-align:bottom}
.brand{overflow:hidden;text-overflow:ellipsis}

/* 인터넷 끊김 안내 */
.netbar{position:fixed;left:0;right:0;top:0;z-index:300;background:var(--warnbg);color:var(--warn);font-size:13px;font-weight:600;text-align:center;padding:8px 14px}
body.offline .top{top:33px}
body.offline main{padding-top:52px}

/* 제출물 사진 */
.shots{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.shots img{width:104px;height:104px;object-fit:cover;border-radius:10px;background:var(--mist);display:block}
.shots.edit{margin:0 0 10px}
.shots .shot{position:relative;display:inline-block}
.shots .shot .x{position:absolute;top:-6px;right:-6px;width:24px;height:24px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;box-shadow:0 2px 6px rgba(0,0,0,.25)}
.shots .shot .x:hover{background:var(--bad)}