:root{
  --bg:#f4f6f9;
  --card:#ffffff;
  --ink:#1c2430;
  --ink2:#5a6675;
  --ink3:#8b96a5;
  --line:#e3e8ef;
  --accent:#2563eb;
  --accent-soft:#eff4ff;
  --p1:#2563eb; --p1s:#eaf1ff;
  --p2:#0d9488; --p2s:#e6f6f4;
  --p3:#b45309; --p3s:#fdf1e3;
  --p4:#7c3aed; --p4s:#f2ecfe;
  --ok:#15803d; --oks:#e9f7ee;
  --warn:#b91c1c; --warns:#fdeeee;
  --editor-bg:#232733;
  --radius:12px;
  --mono:"D2Coding","JetBrains Mono","Consolas","Menlo","Monaco",monospace;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  height:100vh;height:100dvh;display:flex;flex-direction:column;
  font-family:"Pretendard","Pretendard Variable",-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic","맑은 고딕",system-ui,sans-serif;
  font-size:15px;line-height:1.72;-webkit-font-smoothing:antialiased;
  overflow:hidden;
}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
a{color:var(--accent)}

/* ============ TOP BAR ============ */
#topbar{
  height:56px;flex-shrink:0;display:flex;align-items:center;gap:14px;
  padding:0 18px;padding-left:max(18px,env(safe-area-inset-left));
  padding-right:max(18px,env(safe-area-inset-right));
  background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20;
}
#brand{display:flex;align-items:center;gap:9px;font-weight:800;letter-spacing:-.3px;cursor:pointer;flex-shrink:0}
#brand .logo{
  width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,#2563eb,#7c3aed);
  color:#fff;display:grid;place-items:center;font-size:15px;font-weight:800
}
#brand .logo.long{font-size:11px;letter-spacing:-.4px}
#brand .t{font-size:15px}
#brand .t small{display:block;font-size:11px;color:var(--ink3);font-weight:600;letter-spacing:0}
#crumb{
  flex:1;min-width:0;display:flex;align-items:center;gap:10px;
  font-size:13.5px;color:var(--ink2);overflow:hidden;white-space:nowrap;text-overflow:ellipsis
}
#crumb .chip{
  flex-shrink:0;font-size:11.5px;font-weight:700;padding:3px 9px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent)
}
#crumb b{color:var(--ink);font-weight:700}
.tbtn{
  border:1px solid var(--line);background:#fff;border-radius:9px;padding:7px 13px;
  font-size:13px;font-weight:600;color:var(--ink2);transition:.15s;flex-shrink:0
}
.tbtn:hover:not(:disabled){background:#f7f9fc;color:var(--ink);border-color:#cfd7e3}
.tbtn:disabled{opacity:.35;cursor:default}
.tbtn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.tbtn.primary:hover{background:#1d4ed8}
#pyStatus{
  font-size:11.5px;font-weight:700;padding:5px 11px;border-radius:999px;flex-shrink:0;
  background:#fef6e7;color:#b45309;display:flex;align-items:center;gap:6px
}
#pyStatus.ready{background:var(--oks);color:var(--ok)}
#pyStatus.err{background:var(--warns);color:var(--warn)}
#pyStatus .dot{width:6px;height:6px;border-radius:50%;background:currentColor}
#pyStatus:not(.ready):not(.err) .dot{animation:pulse 1.1s infinite}
@keyframes pulse{0%,100%{opacity:.25}50%{opacity:1}}

/* ============ HOME ============ */
#home{flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch}
#home[hidden]{display:none}
.home-inner{max-width:1080px;margin:0 auto;padding:44px 28px 90px}
.hero h1{font-size:34px;line-height:1.32;margin:0 0 12px;letter-spacing:-1px;font-weight:800}
.hero h1 .g{background:linear-gradient(90deg,#2563eb,#7c3aed);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{margin:0;color:var(--ink2);font-size:15.5px;max-width:640px}
.hero .meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.hero .meta span{
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:6px 13px;font-size:12.5px;font-weight:600;color:var(--ink2)
}
.progress-card{
  margin:26px 0 34px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;display:flex;align-items:center;gap:18px;flex-wrap:wrap
}
.progress-card .lbl{font-size:13px;font-weight:700;color:var(--ink2);flex-shrink:0}
.bar{flex:1;min-width:180px;height:9px;background:#eef1f6;border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,#2563eb,#7c3aed);border-radius:99px;transition:width .45s}
.progress-card .num{font-size:13px;font-weight:800;color:var(--accent);flex-shrink:0}
.progress-card .reset{font-size:12px;color:var(--ink3);text-decoration:underline;flex-shrink:0}

.part{margin-bottom:34px}
.part-head{display:flex;align-items:baseline;gap:11px;margin-bottom:6px;flex-wrap:wrap}
.part-num{
  font-size:11.5px;font-weight:800;padding:4px 10px;border-radius:7px;letter-spacing:.4px
}
.part-head h2{margin:0;font-size:20px;font-weight:800;letter-spacing:-.5px}
.part-head .range{font-size:12.5px;color:var(--ink3);font-weight:600}
.part-desc{margin:0 0 15px;color:var(--ink2);font-size:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));gap:12px}
.lcard{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:15px 16px 14px;
  text-align:left;transition:.16s;position:relative;overflow:hidden;display:flex;flex-direction:column;min-height:126px
}
.lcard:hover{transform:translateY(-2px);border-color:#c8d3e4;box-shadow:0 8px 22px -10px rgba(30,50,90,.25)}
.lcard::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--pc)}
.lcard .no{font-size:11px;font-weight:800;color:var(--pc);letter-spacing:.5px;margin-bottom:5px}
.lcard .ti{font-size:15px;font-weight:700;line-height:1.42;letter-spacing:-.3px;margin-bottom:5px}
.lcard .su{font-size:12.5px;color:var(--ink2);line-height:1.5;flex:1}
.lcard .ft{display:flex;align-items:center;gap:7px;margin-top:11px;font-size:11.5px;color:var(--ink3);font-weight:600}
.lcard .done{
  position:absolute;top:12px;right:12px;width:19px;height:19px;border-radius:50%;
  background:var(--ok);color:#fff;display:none;place-items:center;font-size:11px;font-weight:800
}
.lcard.is-done .done{display:grid}
.lcard.is-done{background:#fbfdfc}
.howto{
  margin-top:38px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px
}
.howto h3{margin:0 0 12px;font-size:16px;font-weight:800}
.howto ol{margin:0;padding-left:20px;color:var(--ink2);font-size:14px}
.howto li{margin-bottom:7px}
.howto b{color:var(--ink)}

/* ============ MOBILE TAB BAR ============ */
#mobileBar{
  display:none;flex-shrink:0;background:#fff;border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);z-index:20
}
#mobileBar .mb{
  flex:1;padding:13px 0;font-size:13.5px;font-weight:700;color:var(--ink3);
  display:flex;align-items:center;justify-content:center;gap:6px;position:relative
}
#mobileBar .mb.on{color:var(--accent)}
#mobileBar .mb.on::after{
  content:"";position:absolute;top:0;left:18%;right:18%;height:2.5px;
  background:var(--accent);border-radius:0 0 3px 3px
}
#lesson[hidden] ~ #mobileBar{display:none!important}

/* ============ 모바일 기호 키패드 ============ */
#keybar{
  display:none;gap:5px;padding:7px 8px;background:#171b24;
  border-top:1px solid #2a3140;overflow-x:auto;flex-shrink:0;
  -webkit-overflow-scrolling:touch;scrollbar-width:none
}
#keybar::-webkit-scrollbar{display:none}
#keybar button{
  flex-shrink:0;min-width:36px;height:34px;padding:0 9px;border-radius:7px;
  background:#2c3341;color:#dbe3f0;font-family:var(--mono);font-size:14px;font-weight:600
}
#keybar button:active{background:var(--accent);color:#fff}
#keybar button.w{font-family:inherit;font-size:12px;font-weight:700}

/* ============ LESSON SPLIT ============ */
#lesson{flex:1;min-height:0;display:flex;overflow:hidden}
#lesson[hidden]{display:none}
#leftPane{width:52%;min-width:280px;overflow-y:auto;background:#fff;border-right:1px solid var(--line)}
#divider{width:6px;cursor:col-resize;background:var(--bg);flex-shrink:0;position:relative}
#divider::after{content:"";position:absolute;inset:0 2px;border-radius:2px;background:var(--line)}
#divider:hover::after{background:var(--accent)}
#rightPane{flex:1;min-width:300px;display:flex;flex-direction:column;background:var(--editor-bg);overflow:hidden}

/* ---- left content ---- */
.doc{padding:30px 34px 90px;max-width:760px}
.doc .l-no{font-size:11.5px;font-weight:800;letter-spacing:1px;color:var(--pc)}
.doc h1{font-size:26px;font-weight:800;letter-spacing:-.7px;margin:6px 0 6px;line-height:1.35}
.doc .l-sub{color:var(--ink2);font-size:14.5px;margin:0 0 18px}
.goal{
  background:var(--pcs);border-left:3px solid var(--pc);border-radius:0 10px 10px 0;
  padding:13px 16px;margin:0 0 26px;font-size:13.8px;color:var(--ink)
}
.goal b{color:var(--pc)}
.doc h2{
  font-size:18.5px;font-weight:800;letter-spacing:-.4px;margin:34px 0 12px;
  padding-top:22px;border-top:1px solid var(--line)
}
.doc h2:first-of-type{border-top:none;padding-top:0}
.doc h3{font-size:15.5px;font-weight:700;margin:24px 0 9px;letter-spacing:-.2px}
.doc p{margin:0 0 13px}
.doc ul,.doc ol{margin:0 0 14px;padding-left:21px}
.doc li{margin-bottom:6px}
.doc code{
  font-family:var(--mono);font-size:.885em;background:#eef1f6;color:#0f172a;
  padding:2px 6px;border-radius:5px;white-space:nowrap
}
.doc strong{font-weight:700}
.doc em{font-style:normal;background:linear-gradient(transparent 62%,#fde68a 62%);font-weight:600}

.code{
  position:relative;background:#232733;color:#e8eaf0;border-radius:10px;
  padding:15px 16px;margin:0 0 15px;overflow-x:auto;
  font-family:var(--mono);font-size:13.2px;line-height:1.68;white-space:pre
}
.code .send{
  position:absolute;top:8px;right:8px;background:rgba(255,255,255,.09);color:#c9d2e3;
  border-radius:7px;padding:4px 9px;font-size:11px;font-weight:700;opacity:0;transition:.15s;
  font-family:inherit
}
.code:hover .send{opacity:1}
.code .send:hover{background:var(--accent);color:#fff}
.code .cm{color:#7c8598}
.code .out{color:#8ee6b0}

.box{border-radius:10px;padding:13px 16px;margin:0 0 15px;font-size:13.8px}
.box .bt{font-weight:800;font-size:12.5px;letter-spacing:.2px;margin-bottom:5px;display:flex;align-items:center;gap:6px}
.box p:last-child{margin-bottom:0}
.box ul{margin-bottom:0}
.tip{background:var(--accent-soft);color:#1e3a8a}
.tip .bt{color:var(--accent)}
.warn{background:var(--warns);color:#7f1d1d}
.warn .bt{color:var(--warn)}
.note{background:#f6f8fa;color:var(--ink2);border:1px solid var(--line)}
.note .bt{color:var(--ink)}
.why{background:linear-gradient(180deg,#fffdf5,#fffaf0);border:1px solid #f2e4c4;color:#6b4f14}
.why .bt{color:#a16207}

table.t{width:100%;border-collapse:collapse;margin:0 0 16px;font-size:13.5px}
table.t th,table.t td{border:1px solid var(--line);padding:8px 11px;text-align:left;vertical-align:top}
table.t th{background:#f6f8fb;font-weight:700;font-size:12.5px}
table.t td code{white-space:nowrap}

.mistake{border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:0 0 15px}
.mistake .mh{background:#fdf3f3;color:var(--warn);font-weight:700;font-size:13px;padding:9px 14px;border-bottom:1px solid #f6dcdc}
.mistake .mb{padding:12px 14px;font-size:13.5px}
.mistake .mb code{background:#f1f4f8}

.summary{
  background:#0f172a;color:#dbe3f0;border-radius:12px;padding:18px 20px;margin:30px 0 0
}
.summary .bt{font-weight:800;color:#93c5fd;font-size:12.5px;letter-spacing:.5px;margin-bottom:9px}
.summary ul{margin:0;padding-left:19px}
.summary li{margin-bottom:6px;font-size:13.8px}
.summary code{background:rgba(255,255,255,.12);color:#e9f0ff}

.nextbar{display:flex;gap:10px;margin-top:34px;flex-wrap:wrap;align-items:center}
.doneBtn{
  border:1px solid var(--ok);color:var(--ok);background:var(--oks);border-radius:9px;
  padding:9px 16px;font-size:13.5px;font-weight:700
}
.doneBtn.on{background:var(--ok);color:#fff}

/* ---- right pane ---- */
#snipbar{
  display:flex;gap:6px;padding:9px 11px;background:#1b1f29;border-bottom:1px solid #313847;
  overflow-x:auto;flex-shrink:0;scrollbar-width:thin
}
.snip{
  flex-shrink:0;padding:6px 12px;border-radius:7px;font-size:12.3px;font-weight:600;
  color:#98a3b6;background:transparent;white-space:nowrap;transition:.13s
}
.snip:hover{background:#262c39;color:#dbe3f0}
.snip.on{background:var(--accent);color:#fff}
.snip.ex{border:1px dashed #4a5468}
.snip.ex.on{border-color:transparent}
#snipDesc{
  flex-shrink:0;padding:11px 14px;background:#1f2530;border-bottom:1px solid #313847;
  font-size:12.8px;line-height:1.62;color:#b3bece
}
#snipDesc:empty{display:none}
#snipDesc .t{
  display:inline-block;margin-right:5px;padding:1px 8px;border-radius:5px;
  font-size:11px;font-weight:800;letter-spacing:.3px;
  background:#2f4a7a;color:#bcd4ff;vertical-align:1.5px
}
#snipDesc .t.ex{background:#5c4416;color:#ffdb99}
#snipDesc b{color:#93c5fd;font-weight:700}
#snipDesc .try{
  display:block;margin-top:5px;padding-left:9px;border-left:2px solid #3f7fd4;color:#93a6bf
}
#editArea{flex:1;min-height:120px;display:flex;overflow:hidden}
.pane{flex:1;min-width:0;display:flex;flex-direction:column;overflow:hidden}
.pane[hidden]{display:none}
#solPane{border-left:1px solid #313847;background:#1d212b}
.paneHead{
  display:none;align-items:center;gap:8px;padding:7px 12px;flex-shrink:0;
  font-size:11px;font-weight:800;letter-spacing:.6px;color:#7c869a;
  background:#1b1f29;border-bottom:1px solid #2a3140
}
#editArea.split .paneHead{display:flex}
.paneHead .sp{margin-left:auto;display:flex;gap:6px}
.phBtn{
  font-size:11px;font-weight:700;padding:3px 9px;border-radius:6px;
  background:#2c3341;color:#a8b3c6;letter-spacing:0
}
.phBtn:hover{background:#39414f;color:#e6ecf7}
.phBtn.close:hover{background:#7f1d1d;color:#fff}
#editorWrap{flex:1;min-height:80px;overflow:hidden;position:relative}
#solBody{flex:1;min-height:80px;overflow:auto;position:relative}
#solBody pre{
  margin:0;padding:12px 14px;font-family:var(--mono);font-size:13.2px;line-height:1.62;
  color:#c9d3e4;white-space:pre;overflow:auto
}
.CodeMirror{height:100%!important;font-family:var(--mono)!important;font-size:13.4px;line-height:1.62}
.CodeMirror-gutters{border-right:1px solid #333a49!important}
#fallbackEditor{
  width:100%;height:100%;background:var(--editor-bg);color:#e8eaf0;border:none;outline:none;
  font-family:var(--mono);font-size:13.4px;line-height:1.62;padding:12px 14px;resize:none;display:none
}
#runbar{
  display:flex;align-items:center;gap:8px;padding:10px 12px;background:#1b1f29;
  border-top:1px solid #313847;flex-shrink:0;flex-wrap:wrap
}
.rbtn{
  border-radius:8px;padding:8px 15px;font-size:13px;font-weight:700;transition:.14s;
  background:#2c3341;color:#c9d2e3
}
.rbtn:hover:not(:disabled){background:#39414f}
.rbtn:disabled{opacity:.4;cursor:default}
.rbtn.run{background:#16a34a;color:#fff}
.rbtn.run:hover:not(:disabled){background:#15803d}
.rbtn.sol{background:transparent;border:1px solid #4a5468;color:#98a3b6}
#runbar .hintTxt{margin-left:auto;font-size:11.5px;color:#6d7688}
#outWrap{
  height:34%;min-height:96px;background:#161a22;border-top:1px solid #313847;
  display:flex;flex-direction:column;flex-shrink:0
}
#outHead{
  padding:7px 13px;font-size:11px;font-weight:800;letter-spacing:.7px;color:#6d7688;
  display:flex;align-items:center;gap:8px;border-bottom:1px solid #232936
}
#outHead .clr{margin-left:auto;font-size:11px;color:#5c6577;font-weight:600}
#outHead .clr:hover{color:#98a3b6}
#output{
  flex:1;margin:0;padding:11px 14px;overflow:auto;font-family:var(--mono);
  font-size:12.9px;line-height:1.62;color:#c8d0de;white-space:pre-wrap;word-break:break-word
}
#output .ok{color:#7ee2a8}
#output .err{color:#ff8b8b}
#output .sys{color:#6d7688;font-style:italic}
#output .warnline{color:#f6c56b}
/* 웹·TS: 화면 미리보기 + 콘솔 */
#outWrap.web{height:38%}
#outWrap.web.withframe{height:56%}
#webFrameWrap{flex:1.5;min-height:90px;display:flex;flex-direction:column;background:#fff;border-bottom:1px solid #313847}
#webFrameWrap[hidden]{display:none}
#webFrameHead{padding:5px 13px;font-size:11px;font-weight:800;letter-spacing:.7px;color:#6d7688;background:#161a22;border-bottom:1px solid #232936}
#webFrame{flex:1;width:100%;border:0;background:#fff}
#outWrap.web #output{flex:1;min-height:60px}
/* SQL 결과 표 */
#output .rtw{white-space:normal;margin:2px 0 12px;overflow-x:auto;max-width:100%}
#output .rtc{font-size:11.5px;color:#7f8aa0;margin-bottom:4px;font-family:var(--sans,inherit)}
#output table.rt{border-collapse:collapse;font-size:12.4px;min-width:40%}
#output .rt th{background:#262c3a;color:#e6ebf5;font-weight:700;text-align:left;padding:5px 10px;border:1px solid #333b4d;white-space:nowrap}
#output .rt td{padding:4px 10px;border:1px solid #2c3343;color:#d3d9e6;white-space:nowrap}
#output .rt tbody tr:nth-child(even) td{background:rgba(255,255,255,.025)}
#output .rt td.num{text-align:right;font-variant-numeric:tabular-nums;color:#9fd3ff}
#output .rt td.nul{color:#6d7688;font-style:italic}
#output .rt td.empty{color:#6d7688;font-style:italic;text-align:center}
#output .hint{
  display:block;margin-top:9px;padding:10px 12px;background:rgba(96,165,250,.11);
  border-left:3px solid #60a5fa;border-radius:0 7px 7px 0;color:#bdd6ff;font-style:normal;
  font-family:inherit;white-space:pre-wrap
}
#output .hint b{color:#93c5fd}

@media (max-width:860px){
  #topbar{height:52px;padding-left:max(10px,env(safe-area-inset-left));padding-right:max(10px,env(safe-area-inset-right));gap:7px}
  #brand{gap:7px}
  #brand .logo{width:25px;height:25px;font-size:13px}
  #brand .logo.long{font-size:10px}
  #brand .t{font-size:13px;line-height:1.2}
  #brand .t small{display:none}
  #crumb{display:none}
  .tbtn{padding:7px 10px;font-size:12.5px}
  #pyStatus{padding:6px;gap:0}
  #pyStatus #pyStatusTxt{display:none}

  #mobileBar{display:flex}
  #divider{display:none}
  #leftPane{width:100%!important;border-right:none}
  #rightPane{width:100%}
  #lesson.mv-run #leftPane{display:none}
  #lesson.mv-doc #rightPane{display:none}

  .doc{padding:20px 16px 46px}
  .doc h1{font-size:23px}
  .doc .l-sub{font-size:13.5px}
  .doc h2{font-size:17.5px;margin:28px 0 11px;padding-top:19px}
  .doc h3{font-size:15px}
  .code{font-size:12.4px;padding:13px 12px}
  .code .send{
    position:static;opacity:1;display:block;width:100%;margin:11px 0 0;
    padding:8px;text-align:center;background:rgba(255,255,255,.12);font-size:12px
  }
  table.t{font-size:12.6px}
  table.t th,table.t td{padding:7px 8px}
  .box,.mistake .mb{font-size:13.4px}

  .home-inner{padding:26px 16px 44px}
  .hero h1{font-size:25px;letter-spacing:-.7px}
  .hero p{font-size:14.5px}
  .grid{grid-template-columns:1fr;gap:10px}
  .lcard{min-height:0}
  .progress-card{gap:12px;padding:15px 16px}
  .progress-card .bar{min-width:120px}
  .howto{padding:18px 16px}

  #snipbar{padding:8px 9px}
  .snip{padding:7px 12px;font-size:12.5px}
  #snipDesc{font-size:12.5px;padding:10px 12px}
  #editArea.split{flex-direction:column}
  #solPane{border-left:none;border-top:1px solid #313847}
  .CodeMirror{font-size:16px!important}
  #fallbackEditor{font-size:16px}
  #keybar{display:flex}
  #runbar{padding:9px 10px;gap:7px}
  .rbtn{padding:10px 15px;font-size:13.5px}
  #runbar .hintTxt{display:none}
  #outWrap{height:40%;min-height:120px}
  #outWrap.web.withframe{height:60%}
  #output{font-size:13px}
  .paneHead{padding:8px 11px}
}

@media (max-width:420px){
  .doc{padding:18px 13px 46px}
  .home-inner{padding:22px 13px 40px}
  .hero h1{font-size:22px}
  .code{font-size:11.8px}
  .rbtn{padding:10px 12px;font-size:13px}
}

/* 터치 기기: hover 로 나타나는 UI 를 항상 보이게 */
@media (hover:none){
  .code .send{opacity:1}
}

/* ============ 허브(전체 강의) 버튼 ============ */
.tbtn.hub{
  text-decoration:none;display:flex;align-items:center;justify-content:center;
  width:34px;height:34px;padding:0;font-size:15px;color:var(--ink2)
}
.tbtn.hub:hover{background:#f7f9fc;color:var(--ink);border-color:#cfd7e3}

/* =========================================================
   포털(허브) 페이지
   ========================================================= */
body.hub-page{display:block;height:auto;overflow:auto}
.hub-top{
  background:#fff;border-bottom:1px solid var(--line);
  padding:0 max(18px,env(safe-area-inset-left))
}
.hub-top-in{
  max-width:1000px;margin:0 auto;height:58px;display:flex;align-items:center;gap:10px
}
.hub-top .logo{
  width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,#2563eb,#7c3aed);
  color:#fff;display:grid;place-items:center;font-size:14px;font-weight:800
}
.hub-top .nm{font-weight:800;font-size:15.5px;letter-spacing:-.3px}
.hub-top .nm small{display:block;font-size:11.5px;color:var(--ink3);font-weight:600;letter-spacing:0}
.hub-wrap{max-width:1000px;margin:0 auto;padding:52px 20px 90px}
.hub-hero h1{
  font-size:36px;line-height:1.3;letter-spacing:-1.2px;font-weight:800;margin:0 0 14px
}
.hub-hero h1 .g{
  background:linear-gradient(90deg,#2563eb,#0d9488);-webkit-background-clip:text;
  background-clip:text;color:transparent
}
.hub-hero p{margin:0;color:var(--ink2);font-size:16px;max-width:580px;line-height:1.75}
.hub-stat{
  display:flex;gap:10px;flex-wrap:wrap;margin:22px 0 42px
}
.hub-live{
  display:flex;gap:8px 18px;flex-wrap:wrap;align-items:center;margin:24px 0 -8px;
  font-size:14px;color:var(--ink2);font-weight:600
}
.hub-live[hidden]{display:none}
.hub-live .it{display:inline-flex;align-items:center;gap:6px}
.hub-live b{color:var(--ink);font-weight:800;font-variant-numeric:tabular-nums}
.hub-live .dot{
  width:8px;height:8px;border-radius:50%;background:#16a34a;display:inline-block;
  box-shadow:0 0 0 0 rgba(22,163,74,.5);animation:livePulse 2s infinite
}
@keyframes livePulse{
  0%{box-shadow:0 0 0 0 rgba(22,163,74,.45)}
  70%{box-shadow:0 0 0 8px rgba(22,163,74,0)}
  100%{box-shadow:0 0 0 0 rgba(22,163,74,0)}
}
@media (prefers-reduced-motion:reduce){.hub-live .dot{animation:none}}
.hub-stat span{
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:7px 14px;font-size:12.5px;font-weight:600;color:var(--ink2)
}
.hub-group{margin-bottom:38px}
.hub-group > h2{
  font-size:13px;font-weight:800;letter-spacing:.8px;color:var(--ink3);
  margin:0 0 14px;text-transform:uppercase
}
.hub-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:14px}
.ccard{
  display:block;text-decoration:none;color:inherit;background:#fff;
  border:1px solid var(--line);border-radius:14px;padding:20px 21px 18px;
  position:relative;overflow:hidden;transition:.17s
}
.ccard::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--cc)}
.ccard:not(.off):hover{
  transform:translateY(-3px);border-color:#c8d3e4;
  box-shadow:0 12px 30px -14px rgba(30,50,90,.3)
}
.ccard.off{opacity:.62;cursor:default;background:#fbfcfd}
.ccard .ch{display:flex;align-items:center;gap:11px;margin-bottom:13px}
.ccard .cl{
  width:40px;height:40px;border-radius:11px;background:var(--ccs);color:var(--cc);
  display:grid;place-items:center;font-size:14px;font-weight:800;flex-shrink:0;letter-spacing:-.5px
}
.ccard .ct{flex:1;min-width:0}
.ccard .ct b{display:block;font-size:17px;font-weight:800;letter-spacing:-.4px;line-height:1.35}
.ccard .ct i{display:block;font-style:normal;font-size:12.5px;color:var(--ink3);font-weight:600;margin-top:1px}
.ccard .badge{
  flex-shrink:0;font-size:11px;font-weight:800;padding:4px 9px;border-radius:6px;
  background:var(--ccs);color:var(--cc)
}
.ccard .badge.soon{background:#f1f3f7;color:var(--ink3)}
.ccard .cd{font-size:13.6px;color:var(--ink2);line-height:1.68;margin:0 0 14px}
.ccard .tags{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:14px}
.ccard .tags span{
  font-size:11.5px;font-weight:600;color:var(--ink2);background:#f4f6fa;
  border-radius:6px;padding:4px 8px
}
.ccard .cf{
  display:flex;align-items:center;gap:9px;padding-top:13px;border-top:1px solid var(--line);
  font-size:12px;color:var(--ink3);font-weight:600
}
.ccard .cf .pb{flex:1;height:6px;background:#eef1f6;border-radius:99px;overflow:hidden;min-width:60px}
.ccard .cf .pb i{display:block;height:100%;background:var(--cc);border-radius:99px;transition:width .5s}
.ccard .cf .pn{color:var(--cc);font-weight:800;flex-shrink:0}
.ccard .go{margin-left:auto;color:var(--cc);font-weight:800;flex-shrink:0}
.hub-note{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 24px;margin-top:8px
}
.hub-note h3{margin:0 0 10px;font-size:15.5px;font-weight:800}
.hub-note p{margin:0 0 9px;color:var(--ink2);font-size:13.8px;line-height:1.75}
.hub-note p:last-child{margin-bottom:0}
.hub-note code{font-family:var(--mono);font-size:.88em;background:#eef1f6;padding:2px 6px;border-radius:5px}
.hub-foot{margin-top:34px;text-align:center;color:var(--ink3);font-size:12.5px}
.hub-foot .rs{color:var(--ink3);text-decoration:underline;font-size:12px}

@media (max-width:860px){
  .hub-wrap{padding:34px 16px 60px}
  .hub-hero h1{font-size:26px;letter-spacing:-.8px}
  .hub-hero p{font-size:14.5px}
  .hub-stat{margin:18px 0 30px}
  .hub-grid{grid-template-columns:1fr}
  .ccard{padding:17px 17px 15px}
  .hub-note{padding:18px 17px}
}

/* ============ 본문 다이어그램 ============ */
.diag{
  background:#fbfcfe;border:1px solid var(--line);border-radius:10px;
  padding:15px 16px;margin:0 0 16px;overflow-x:auto
}
.diag pre{
  margin:0;font-family:var(--mono);font-size:12.3px;line-height:1.6;
  color:var(--ink);white-space:pre
}
.diag .cap{margin-top:10px;font-size:12.3px;color:var(--ink3);text-align:center;font-family:inherit}
.flow{counter-reset:fl;margin:0 0 17px;padding:0;list-style:none}
.flow li{
  position:relative;padding:0 0 15px 32px;border-left:2px solid var(--line);margin-left:11px
}
.flow li:last-child{border-left-color:transparent;padding-bottom:0}
.flow li::before{
  counter-increment:fl;content:counter(fl);position:absolute;left:-12px;top:-1px;
  width:22px;height:22px;border-radius:50%;background:var(--pc);color:#fff;
  font-size:11.5px;font-weight:800;display:grid;place-items:center
}
.flow li b{display:block;margin-bottom:2px;font-size:14.5px}
.flow li span{color:var(--ink2);font-size:13.6px}