/* 로보라이즌 코스웨어 — 공통 스타일 (2026-10 리뉴얼: cube·python.roborisen.com 톤에 맞춘 미니멀) */
:root{
  --ink:#0f172a; --ink2:#334155; --quiet:#64748b; --faint:#94a3b8;
  --line:#e7e9f0; --line-soft:#f0f2f7; --line-strong:#d7dbe5; --bg:#f7f8fb; --card:#fff;
  --brand:#4338ca; --brand2:#4f46e5; --brand-soft:#eef2ff; --brand-line:#e0e3fb;
  --app:#f08a24; --app-bg:#fff6ec;
  --scratch:#8b5cf6; --scratch-bg:#f5f1ff;
  --python:#0d9488; --python-bg:#effbf8;
  --ok:#0d9488; --warn:#a06a00;
  --r:14px; --shadow:0 1px 2px rgba(15,23,42,.04); --shadow-md:0 1px 3px rgba(15,23,42,.05),0 12px 28px -16px rgba(15,23,42,.18);
}
*{box-sizing:border-box}
html,body{margin:0;background:#fff;color:var(--ink);font-family:'Pretendard Variable',Pretendard,'Apple SD Gothic Neo','Malgun Gothic',system-ui,sans-serif;font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;letter-spacing:-.005em}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
img{max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* 헤더 */
.top{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:20px;height:60px;max-width:none;padding:0 28px}
.logo{display:flex;align-items:baseline;gap:10px;font-weight:700;letter-spacing:-.02em;font-size:16px}
.logo .mark{font-weight:800;letter-spacing:.04em;font-size:14px}
.logo .div{width:1px;height:14px;background:var(--line-strong);align-self:center}
.logo .nm{font-weight:600;color:var(--ink2);font-size:15px}
.top nav{display:flex;gap:2px;margin-left:8px}
.top nav a{padding:6px 12px;border-radius:8px;color:var(--quiet);font-size:14px;font-weight:500}
.top nav a:hover,.top nav a.on{color:var(--ink);background:var(--bg)}
.top .right{margin-left:auto;display:flex;align-items:center;gap:8px}
.top .right .guide{border-color:var(--ink);font-weight:600}
@media (max-width:640px){.top .right .guide{display:none}}
.group{display:flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:10px;padding:3px 4px 3px 12px;font-size:13px;color:var(--quiet);background:#fff}
.group input{width:42px;border:0;background:var(--bg);border-radius:7px;padding:4px 6px;text-align:center;font-weight:700;color:var(--ink);font-size:14px;font-family:inherit}
.toggle{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--ink2);border:1px solid var(--line);border-radius:10px;padding:6px 12px;background:#fff}
.toggle:hover{border-color:var(--line-strong)}
.toggle.on{background:var(--ink);color:#fff;border-color:var(--ink)}

/* 공통 */
.chip{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:2px 9px;border-radius:6px;background:var(--bg);color:var(--ink2);white-space:nowrap;border:1px solid var(--line-soft)}
.chip.app::before,.chip.scratch::before,.chip.python::before,.dot::before{content:'';width:6px;height:6px;border-radius:50%;background:currentColor;flex:none}
.chip.app,.chip.scratch,.chip.python{background:#fff;border-color:var(--line);color:var(--ink)}
.chip.app::before{background:var(--app)}.chip.scratch::before{background:var(--scratch)}.chip.python::before{background:var(--python)}
.chip.sample{background:var(--brand-soft);border-color:var(--brand-line);color:var(--ink)}
.chip.new{background:#fff;border-color:var(--line-strong);color:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 14px;font-size:14px;font-weight:600;color:var(--ink);transition:border-color .12s,background .12s}
.btn:hover{border-color:var(--line-strong);background:var(--bg)}
.btn.primary{background:var(--brand2);border-color:var(--brand2);color:#fff}
.btn.primary:hover{background:var(--brand);border-color:var(--brand)}
.btn.sm{padding:5px 10px;font-size:13px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r)}
.sec{padding:56px 0 8px}
.sec h2{font-size:22px;margin:0 0 6px;letter-spacing:-.02em;font-weight:700}
.sec .sub{color:var(--quiet);margin:0 0 20px;font-size:14.5px}
.muted{color:var(--quiet)}
.footer{margin-top:72px;padding:28px 0 48px;color:var(--faint);font-size:13px;border-top:1px solid var(--line)}
.footer .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* 메인 히어로 */
.hero{border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;padding-top:72px;padding-bottom:64px;align-items:center}
.hero h1{font-size:44px;line-height:1.22;margin:14px 0 16px;letter-spacing:-.035em;font-weight:800}
.hero h1 em{font-style:normal;color:var(--ink)}
.hero h1 .soft{color:var(--quiet);font-weight:700}
.hero p{color:var(--ink2);margin:0 0 26px;font-size:16px;line-height:1.75;max-width:30em}
.hero .cta{display:flex;gap:8px;flex-wrap:wrap}
.hero .cta .btn{padding:11px 18px;font-size:15px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.16em;font-weight:700;color:var(--quiet);text-transform:uppercase}
.eyebrow::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--python)}
.platforms{display:grid;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff}
.pf{display:flex;gap:16px;align-items:center;padding:20px 22px;border-top:1px solid var(--line);transition:background .12s}
.pf:first-child{border-top:0}
.pf:hover{background:var(--bg)}
.pf .ic{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;font-weight:800;font-size:15px;flex:none;background:var(--bg);border:1px solid var(--line);color:var(--ink);position:relative}
.pf .ic::after{content:'';position:absolute;right:-3px;top:-3px;width:9px;height:9px;border-radius:50%;border:2px solid #fff}
.pf.app .ic::after{background:var(--app)}.pf.scratch .ic::after{background:var(--scratch)}.pf.python .ic::after{background:var(--python)}
.pf b{display:block;font-size:15.5px;font-weight:700}
.pf b small{font-weight:500;color:var(--faint);font-size:12.5px;margin-left:6px}
.pf span{font-size:13.5px;color:var(--quiet)}
.pf .go{margin-left:auto;font-size:18px;color:var(--faint)}
.pf:hover .go{color:var(--ink)}

/* 학년 레벨 맵 */
.ladder{padding:22px 22px 18px;overflow-x:auto}
.ladder table{border-collapse:separate;border-spacing:0;width:100%;min-width:820px;table-layout:fixed}
.ladder th{font-size:12px;color:var(--faint);font-weight:600;padding:4px 0 10px;text-align:center}
.ladder th.lane{width:92px;text-align:left}
.ladder td{padding:4px 3px;vertical-align:middle}
.ladder td.lane{font-weight:700;font-size:14px}
.ladder .band{font-size:11.5px;color:var(--quiet);text-align:center;border-bottom:1px solid var(--line);padding-bottom:6px}
.bar{display:block;border-radius:10px;padding:9px 11px;font-size:13px;font-weight:600;line-height:1.35;border:1px solid var(--line);background:#fff;color:var(--ink);position:relative;transition:border-color .12s,background .12s}
.bar::before{content:'';position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:0 3px 3px 0}
.bar:hover{border-color:var(--line-strong);background:var(--bg)}
.bar small{display:block;font-weight:500;font-size:11.5px;color:var(--quiet)}
.bar.app::before{background:var(--app)}.bar.scratch::before{background:var(--scratch)}.bar.python::before{background:var(--python)}
.bar.opt{background:#fff;border-style:dashed;color:var(--quiet);border-color:var(--line-strong)}

/* 필터 + 코스 카드 */
.filters{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:18px}
.filters button{border:1px solid var(--line);background:#fff;border-radius:8px;padding:6px 13px;font-size:13.5px;color:var(--ink2);font-weight:500}
.filters button:hover{border-color:var(--line-strong)}
.filters button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.course{display:flex;flex-direction:column;overflow:hidden;transition:border-color .12s,box-shadow .12s}
.course:hover{border-color:var(--line-strong);box-shadow:var(--shadow-md)}
.course .head{padding:18px 20px 14px}
.course .head h3{margin:10px 0 4px;font-size:17px;letter-spacing:-.02em}
.course .head p{margin:0;color:var(--quiet);font-size:13px;line-height:1.55}
.course .meta{display:flex;gap:12px;padding:0 20px 14px;font-size:12.5px;color:var(--quiet);flex-wrap:wrap}
.course .meta b{color:var(--ink);font-weight:600}
.course ul{list-style:none;margin:0;padding:6px 20px 8px;font-size:13.5px;border-top:1px solid var(--line-soft)}
.course li{padding:6px 0;display:flex;gap:8px;align-items:baseline}
.course li .n{color:var(--faint);font-size:12px;width:40px;flex:none}
.course li a{font-weight:600}
.course li a:hover{text-decoration:underline;text-underline-offset:3px}
.course .foot{margin-top:auto;padding:12px 20px 18px}
.course .foot a{font-size:13.5px;font-weight:600;color:var(--ink)}
.course .foot a:hover{text-decoration:underline;text-underline-offset:3px}

/* 코스 페이지 */
.chead{padding:44px 0 30px;border-bottom:1px solid var(--line);background:#fff}
.crumb{font-size:13px;color:var(--quiet);margin-bottom:8px}
.crumb a:hover{color:var(--ink)}
.chead h1{margin:12px 0 6px;font-size:32px;letter-spacing:-.03em;font-weight:800}
.facts{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.fact{border:1px solid var(--line);border-radius:12px;padding:10px 16px;background:#fff;font-size:12.5px;color:var(--quiet)}
.fact b{display:block;font-size:15px;color:var(--ink);font-weight:600}
.ltable{width:100%;border-collapse:collapse;font-size:14px;background:#fff}
.ltable th,.ltable td{border-bottom:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.ltable th{font-size:12.5px;color:var(--quiet);font-weight:600;background:var(--bg)}
.ltable tr:hover td{background:var(--bg)}
.ltable tr:last-child td{border-bottom:0}
.ltable tr.sample td{background:#fff}
.ltable td.t a{font-weight:600;color:var(--ink)}
.ltable td.t a:hover{text-decoration:underline;text-underline-offset:3px}
.ltable td.t a:hover{text-decoration:underline}
.ltable tr.go{cursor:pointer}
.ltable td.t a{display:block}

/* 차시 페이지 */
.lesson{display:grid;grid-template-columns:var(--lw,50%) 6px minmax(0,1fr);height:calc(100vh - 60px)}
.lesson.toolhidden{grid-template-columns:minmax(0,1fr) 0 0}
.lesson.toolhidden .split{display:none}
.split{cursor:col-resize;background:var(--line);position:relative;touch-action:none}
.split::after{content:'';position:absolute;top:50%;left:1px;width:4px;height:40px;margin-top:-20px;border-radius:2px;background:#b9c1cd}
.split:hover,.split:focus,.lesson.dragging .split{background:#c9d1dd;outline:none}
.lesson.dragging iframe{pointer-events:none}
.paneswitch{display:none}
.lpane{overflow-y:auto;border-right:1px solid var(--line);background:#fff}
.lhead{padding:22px 28px 14px;border-bottom:1px solid var(--line)}
.lhead h1{font-size:24px;margin:8px 0 4px;letter-spacing:-.03em;font-weight:800}
.lhead .row{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.tabs{display:flex;gap:2px;padding:0 20px;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:2;overflow-x:auto}
.tabs button{border:0;background:none;padding:12px 12px;font-size:14px;color:var(--quiet);border-bottom:2px solid transparent;white-space:nowrap}
.tabs button.on{color:var(--ink);border-bottom-color:var(--brand2);font-weight:700}
.tabs button.teacher{display:none}
body.teacher .tabs button.teacher{display:block}
.lbody{padding:22px 28px 60px;font-size:16px}
.lbody h3{font-size:16px;margin:22px 0 8px}
.lbody h3:first-child{margin-top:0}
.lbody p{margin:6px 0}
.lbody ul,.lbody ol{margin:6px 0;padding-left:20px}
.box{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:var(--bg);margin:10px 0}
.box.goal{background:var(--brand-soft);border-color:var(--brand-line)}
.box.tip{background:#fffcf2;border-color:#f6e7b8}
.box.warn{background:#fff8f3;border-color:#f6dcc8}
.box h4{margin:0 0 6px;font-size:14px}
.kv{display:grid;grid-template-columns:110px 1fr;gap:6px 12px;font-size:14px}
.kv dt{color:var(--quiet)}
.kv dd{margin:0}
.flow{display:grid;gap:8px}
.flow .f{display:grid;grid-template-columns:70px 52px 1fr;gap:10px;align-items:start;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:14px}
.flow .f b{font-size:13px}
.flow .f span{color:var(--quiet);font-size:13px}
.steps{counter-reset:s;display:grid;gap:14px}
.stepc{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}
.stepc .sh{display:flex;gap:10px;align-items:center;padding:12px 16px;background:#fff;border-bottom:1px solid var(--line-soft)}
.stepc .sh::before{counter-increment:s;content:counter(s);width:24px;height:24px;border-radius:50%;background:var(--ink);color:#fff;font-size:12px;font-weight:700;display:grid;place-items:center;flex:none}
.stepc .sh b{font-size:15px}
.stepc .sb{padding:12px 16px}
.stepc .done{margin-left:auto;font-size:12px;color:var(--quiet);display:flex;gap:6px;align-items:center}
.code{position:relative;margin:10px 0;border-radius:10px;background:#0f172a;color:#e2e8f0;font-family:Consolas,'D2Coding',monospace;font-size:13px;line-height:1.55;overflow:auto}
.code pre{margin:0;padding:14px 64px 14px 16px}
.code .copy{position:absolute;top:8px;right:8px;border:0;background:#1e293b;color:#cbd5e1;border-radius:6px;padding:3px 9px;font-size:12px}
.code .copy:hover{background:#334155}
.code .lbl{display:block;padding:6px 16px 0;font-size:11px;color:#94a3b8;font-family:inherit}
.tok-c{color:#8b95a5}.tok-s{color:#e2e8f0}.tok-k{color:#fff;font-weight:700}.tok-n{color:#e2e8f0}
.prompt{border-left:4px solid var(--python);background:var(--python-bg);border-radius:8px;padding:10px 14px;margin:10px 0;font-size:14px}
.prompt b{display:block;font-size:12px;color:var(--ink2);margin-bottom:2px}
.fix{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:10px 0}
.fix div{border:1px solid var(--line);border-radius:10px;padding:10px;font-size:13px;background:#fff}
.fix div b{display:block;font-size:11.5px;color:var(--quiet);margin-bottom:2px}
.quiz{border:1px dashed #c7cfdb;border-radius:10px;padding:10px 14px;margin:8px 0;font-size:14px}
.quiz details summary{cursor:pointer;color:var(--ink2);font-size:13px;margin-top:4px}

/* 스크래치풍 블록 */
.blocks{display:grid;gap:10px;margin:10px 0}
.script{display:inline-flex;flex-direction:column;align-items:flex-start;padding:8px;background:#fafbfd;border:1px solid var(--line);border-radius:10px;width:fit-content;max-width:100%}
.blk{color:#fff;font-size:13px;font-weight:600;padding:6px 12px;border-radius:6px;margin:1px 0;box-shadow:inset 0 -2px 0 rgba(0,0,0,.12);white-space:nowrap}
.blk .v{background:#fff;color:#333;border-radius:999px;padding:0 7px;margin:0 2px;font-weight:600}
.blk.hat{border-radius:14px 14px 6px 6px;padding-top:9px}
.blk.event{background:#e6a817}.blk.control{background:#e19a1b;background:#d99a1e}
.blk.motion{background:#4c8bf5}.blk.looks{background:#9966ff}.blk.sound{background:#cf63cf}
.blk.sense{background:#4cb6d9}.blk.op{background:#59c059}.blk.var{background:#ff8c1a}.blk.list{background:#ff661a}
.blk.robot{background:#0fbd8c}.blk.my{background:#ff6680}.blk.ext{background:#2e7d6b}
.blk.c{border-radius:6px 6px 0 0}
.script .inner{border-left:14px solid #d99a1e;padding-left:6px;margin:0 0 1px;display:flex;flex-direction:column;align-items:flex-start}
.script .inner.var{border-color:#ff8c1a}
.cend{width:120px;height:12px;background:#d99a1e;border-radius:0 0 6px 6px;margin-bottom:1px}

/* 앱 단계 그림 */
.appflow{display:flex;gap:6px;flex-wrap:wrap;align-items:center;margin:8px 0}
.appflow span{background:var(--app-bg);color:var(--ink);border:1px solid #f6c38f;border-radius:8px;padding:4px 10px;font-size:13px;font-weight:600}
.appflow i{color:var(--quiet);font-style:normal}
.mm{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
.mm .m{background:#fff;border:1.5px solid #f6c38f;border-radius:10px;padding:6px 10px;font-size:13px;font-weight:600;text-align:center;min-width:72px}
.mm .m small{display:block;font-weight:500;color:var(--quiet);font-size:11px}
.mm .m.rep{border-color:var(--app);background:var(--app-bg)}
.mm .m.if{border-color:#7a4dd8;background:var(--scratch-bg)}

/* 도트 설계판 */
.dotpad{display:flex;gap:16px;flex-wrap:wrap;align-items:flex-start;margin:10px 0}
.dots{touch-action:none;user-select:none;display:grid;grid-template-columns:repeat(8,26px);gap:3px;padding:8px;background:#111827;border-radius:10px}
.dots button{width:26px;height:26px;border-radius:50%;border:0;background:#273244}
.dots button.on{background:#ff4d4d;box-shadow:0 0 8px #ff4d4d}
.dotside{display:grid;gap:6px;font-size:13px}
.frames{display:flex;gap:6px;flex-wrap:wrap}
.frames canvas{border-radius:6px;border:2px solid transparent;background:#111827;cursor:pointer}
.frames canvas.on{border-color:var(--brand2)}

/* 미션·체크·제출 */
.mission{border:1px solid var(--line-strong);border-radius:14px;padding:18px 20px;background:#fff}
.mission h4{margin:0 0 6px;font-size:16px}
.lv{display:grid;gap:8px;margin-top:10px}
.lv div{display:flex;gap:10px;align-items:flex-start;font-size:14px}
.lv div em{font-style:normal;font-size:11.5px;font-weight:700;border-radius:6px;padding:2px 7px;flex:none;margin-top:2px}
.lv .b em{background:#e4f6f1;color:var(--ink)}.lv .c em{background:#fde8e8;color:var(--ink)}
.checks label{display:flex;gap:10px;align-items:flex-start;padding:8px 0;border-bottom:1px dashed var(--line);font-size:14px}
.rate{display:flex;gap:6px;margin-left:auto}
.rate button{border:1px solid var(--line);background:#fff;border-radius:8px;padding:3px 9px;font-size:13px}
.rate button.on{background:var(--brand2);color:#fff;border-color:var(--brand2)}
.submit{display:grid;gap:10px}
.submit input[type=text],.submit textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:9px 12px;font:inherit;font-size:14px}
.submit textarea{min-height:80px}
.sublist{font-size:13px;color:var(--ink2)}
.sublist div{padding:6px 0;border-top:1px dashed var(--line)}
.lnav{display:flex;justify-content:space-between;gap:10px;margin-top:28px;padding-top:16px;border-top:1px solid var(--line)}

/* 도구 패널 */
.tpane{display:flex;flex-direction:column;background:#eef1f6;min-width:0}
.tbar{display:flex;align-items:center;gap:8px;padding:8px 12px;background:#fff;border-bottom:1px solid var(--line);font-size:13px}
.tbar b{font-size:13px}
.tbar .url{color:var(--quiet);font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.tpane iframe{flex:1;border:0;width:100%;background:#fff}
.tnote{padding:8px 12px;font-size:12px;color:var(--quiet);background:#fff;border-top:1px solid var(--line)}
.showtool{position:fixed;right:16px;bottom:16px;z-index:30;display:none}
.lesson.toolhidden ~ .showtool{display:inline-flex}

@media (max-width:980px){
  .hero .wrap{grid-template-columns:1fr}
  .lesson{grid-template-columns:1fr;height:auto}
  .lpane{border-right:0}
  .tpane{height:80vh}
  .top nav{display:none}
  .fix{grid-template-columns:1fr}
}
@media print{
  .top,.tpane,.tabs,.showtool,.lnav{display:none!important}
  .lesson{display:block;height:auto}
}

/* ── 4단계 탭(스테퍼) ── */
.stepper{display:grid;grid-template-columns:repeat(4,1fr) auto;gap:8px;padding:12px 20px;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:3}
.stepper button{display:flex;align-items:center;gap:10px;border:1px solid var(--line);background:#fff;border-radius:12px;padding:8px 10px;text-align:left;transition:all .15s;min-width:0}
.stepper button:hover{border-color:var(--line-strong);background:var(--bg)}
.stepper .no{width:28px;height:28px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;font-weight:700;font-size:14px;flex:none}
.stepper .tx{min-width:0}
.stepper .tx b{display:block;font-size:15px;line-height:1.2}
.stepper .tx small{display:block;font-size:12.5px;color:var(--quiet);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stepper button.done .no{background:var(--ink);color:#fff}
.stepper button.on{border-color:var(--brand2);background:var(--brand2);color:#fff;box-shadow:0 6px 16px -6px rgba(79,70,229,.45)}
.stepper button.on .no{background:#fff;color:var(--ink)}
.stepper button.on .tx small{color:#fff;opacity:.85}
.stepper button.teacher{display:none;padding:8px 12px}
body.teacher .stepper button.teacher{display:flex}
.stepper button.pulse{animation:tabpulse 1.6s ease-in-out 3}
@keyframes tabpulse{0%,100%{box-shadow:0 0 0 0 rgba(79,70,229,0)}50%{box-shadow:0 0 0 6px rgba(79,70,229,.22)}}
.nextbar{display:flex;justify-content:flex-end;margin-top:26px}
.nextbar .btn{font-size:16px;padding:12px 20px;border-radius:12px}

@media (max-width:980px){.stepper{grid-template-columns:repeat(2,1fr)}}

/* ── 활동 탭 따라하기(앱 화면 사진) ── */
.follow{margin-top:14px;border:1px solid var(--line);border-radius:14px;background:#fff;padding:12px}
.follow .fhead{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.follow .ftag{background:#e62828;color:#fff;font-weight:700;font-size:12px;border-radius:999px;padding:3px 10px}
.follow .fcount{font-weight:700;font-size:13px;color:var(--ink2)}
.follow .fdots{margin-left:auto;display:flex;flex-wrap:wrap;justify-content:flex-end;gap:5px}
.follow .ftag,.follow .fcount{white-space:nowrap;flex:none}
.follow .fcount{min-width:4.6em}
.follow .fdots button{width:11px;height:11px;border-radius:50%;border:0;padding:0;background:#e5c9c9;cursor:pointer}
.follow .fdots button.past{background:#f09a9a}
.follow .fdots button.on{background:#e62828;transform:scale(1.25)}
.follow figure{margin:0;border-radius:10px;overflow:hidden;border:1px solid var(--line);background:var(--bg)}
.follow figure{height:max(220px,min(520px,calc(100vh - 330px)));max-height:max(220px,min(520px,calc(100vh - 330px)));display:flex;align-items:center;justify-content:center}
.follow figure img{display:block;width:100%;height:100%;object-fit:contain;cursor:zoom-in}
.follow .fcap{font-size:16px;line-height:1.5;font-weight:600}
.follow .fcap b{color:var(--ink)}
.follow .fbot{display:flex;align-items:flex-start;gap:12px;margin-top:10px}
.follow .fbot .fcap{padding-top:9px}
.follow .fbot .fcap{flex:1;margin:0}
.follow .fnext{flex:none;border:0;cursor:pointer;color:#fff;background:#e62828;font-weight:800;font-size:17px;padding:10px 20px;border-radius:999px;display:flex;align-items:center;gap:6px;animation:fblink 2.4s ease-in-out infinite}
.follow .fnext b{font-size:26px;line-height:1}
.follow .fnext:hover{animation:none;filter:brightness(1.1)}
.follow .fdone{flex:none;color:var(--ink2);font-weight:800;font-size:15px}
.follow .fprev{border:1px solid var(--line);background:#fff;color:var(--ink);width:26px;height:26px;border-radius:50%;font-size:18px;line-height:1;padding:0;cursor:pointer}
.follow .fprev:disabled{opacity:.35;cursor:default}
@keyframes fblink{0%,100%{opacity:1}50%{opacity:.62}}
.zoomer{position:fixed;inset:0;z-index:100;background:rgba(15,18,25,.82);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;cursor:zoom-out}
.zoomer img{max-width:94vw;max-height:86vh;border-radius:10px;box-shadow:0 10px 40px rgba(0,0,0,.4)}
.zoomer span{color:#fff;font-size:13px;opacity:.8}

/* ── 개요: 로봇 준비 ── */
.ready{display:flex;gap:18px;align-items:center;border:1px solid var(--line);border-radius:14px;background:#fff;padding:14px;margin-bottom:16px}
.ready img{width:190px;height:150px;object-fit:contain;flex:none;cursor:zoom-in}
.ready .rtag{display:inline-block;background:var(--ink);color:#fff;font-size:12px;font-weight:700;border-radius:999px;padding:2px 10px;margin-bottom:6px}
.ready b{display:block;font-size:19px;margin-bottom:4px}
.ready ul{margin:0;padding-left:18px;color:var(--ink2);font-size:14px;line-height:1.6}
@media (max-width:640px){.ready{flex-direction:column;align-items:flex-start}.ready img{width:100%}}

.codecopy{margin:8px 0}.codecopy>summary{cursor:pointer;color:var(--ink2);font-size:13px;padding:4px 0}.codecopy[open]>summary{margin-bottom:6px}

/* 평가 반영(2026-10): 초1~2·제출 준비·도움말·접근성 */
.tonly{display:none}
body.teacher .tonly{display:block;border-left:3px solid var(--line);padding-left:12px;margin-top:14px}
.box.kid p{font-size:19px;font-weight:700;line-height:1.5;margin:4px 0 0}
.checks.faces label{align-items:center;font-size:17px}
.checks.faces .rate button{font-size:26px;padding:4px 10px;border-radius:12px;line-height:1}
.checks.faces .rate button i{font-style:normal}
.checks.faces .rate button.on{background:#fff;border:2px solid var(--ink);color:var(--ink)}
.submit .who{font-size:14px;color:var(--ink2)}
.submit .fileslot{display:grid;gap:4px;font-size:14px;color:var(--ink2)}
.submit .note{font-size:13px;margin:0}
.kidmemo{display:flex;gap:8px;flex-wrap:wrap}
.kidmemo button{border:1.5px solid var(--line);background:#fff;border-radius:14px;padding:10px 14px;font-size:17px;font-weight:600;color:var(--ink)}
.kidmemo button.on{border-color:var(--ink)}
.sublist-items{margin:4px 0 0}
.sublist .btn{margin-top:8px}
.rubric{width:100%;border-collapse:collapse;font-size:14px;margin:6px 0}
.rubric th,.rubric td{border:1px solid var(--line);padding:6px 8px;vertical-align:top;text-align:left}
.rubric th{background:var(--bg);color:var(--ink2);font-weight:600}
.privacy ul{margin:4px 0 0}
.follow .say{flex:none;border:1px solid var(--line);background:#fff;border-radius:50%;width:40px;height:40px;font-size:18px;cursor:pointer}
body.young .follow .fcap{font-size:18px}
.thelp{background:#fff;border-top:1px solid var(--line);font-size:13.5px;color:var(--ink2)}
.thelp summary{cursor:pointer;padding:7px 12px;font-weight:600;color:var(--ink)}
.thelp ol{margin:0 0 8px;padding-left:34px}
.credit{font-size:12.5px;color:var(--quiet);margin-top:14px}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media (max-width:980px){
  .lesson{grid-template-columns:1fr!important;height:calc(100vh - 60px - 52px)}
  .split{display:none}
  .lesson .tpane{display:none;height:100%}
  .lesson.showt .lpane{display:none}
  .lesson.showt .tpane{display:flex}
  .paneswitch{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:40;background:#fff;border-top:1px solid var(--line);height:52px}
  .paneswitch button{flex:1;border:0;background:#fff;font-size:16px;font-weight:700;color:var(--quiet)}
  .paneswitch button.on{color:var(--ink);box-shadow:inset 0 -3px 0 var(--ink)}
  .showtool{display:none!important}
}
.notes{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.notes span{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;font-size:18px;font-weight:800;color:var(--ink);border:1px solid rgba(0,0,0,.08)}
.notes .nbr{flex-basis:100%;height:0}
.follow-static{margin-top:12px;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff}
.follow-static img{display:block;width:100%;max-height:300px;object-fit:contain;cursor:zoom-in}
.follow-static p{margin:8px 0 0;font-weight:600}
.imgph{display:flex;align-items:center;justify-content:center;min-height:160px;background:#f3f4f6;border:1px dashed #c8ccd2;border-radius:10px;color:#6b7280;font-size:14px}

/* ── 첫 화면·플랫폼 화면: 정사각형 버튼 (2026-10-06) ── */
.home{border-bottom:1px solid var(--line)}
.home .wrap{padding-top:64px;padding-bottom:60px;text-align:center}
.home .lead{font-size:26px;line-height:1.5;letter-spacing:-.03em;font-weight:600;color:var(--ink2);margin:0 0 40px}
.home .lead b{color:var(--ink);font-weight:800}
.home .crumb{text-align:left}
.pfh{font-size:34px;letter-spacing:-.03em;font-weight:800;margin:8px 0 36px}
.pfh small{display:block;font-size:14px;font-weight:500;color:var(--quiet);letter-spacing:0;margin-top:6px}
.tile.pfb b{font-size:32px;text-align:center}
.tiles{display:flex;justify-content:center;flex-wrap:wrap;gap:22px}
.tile{width:220px;aspect-ratio:1/1;border:1px solid var(--line);border-radius:22px;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:18px;position:relative;transition:border-color .15s,box-shadow .15s,transform .15s}
.tile:hover{border-color:var(--line-strong);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.tile::after{content:'';position:absolute;left:28px;right:28px;bottom:0;height:4px;border-radius:4px 4px 0 0}
.tile.app::after{background:var(--app)}.tile.scratch::after{background:var(--scratch)}.tile.python::after{background:var(--python)}
.tile b{font-size:24px;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.tile .meta{font-size:13px;color:var(--quiet)}
.tile .ic{width:72px;height:72px;border-radius:20px;background:var(--bg);border:1px solid var(--line);display:grid;place-items:center;font-size:28px;font-weight:800;color:var(--ink)}
.tile .tag{font-size:13px;font-weight:700;color:var(--ink2);background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:3px 12px}
.tile.lv b{font-size:22px;line-height:1.3;text-align:center}
@media (max-width:760px){.tile{width:calc(50% - 12px);min-width:150px}.home .lead{font-size:20px}}

/* ───── 로그인·입장·수업 관리 (2026-10 릴리즈) ───── */
.rcbar{display:flex;align-items:center;gap:8px}
.rcbar .who{display:flex;flex-direction:column;line-height:1.2;font-size:13px;text-align:right}
.rcbar .who small{color:var(--quiet);font-size:11.5px}
.btn.big{padding:12px 22px;font-size:16px;border-radius:12px}
.btn.danger{color:#b42318;border-color:#f3c7c2}
.btn.danger:hover{background:#fff4f2}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.note{font-size:13px}
.rcband{position:sticky;top:0;z-index:30;display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap;padding:10px 16px;background:var(--brand-soft);border-bottom:1px solid var(--brand-line);font-size:14.5px}
.rcband.warn{background:#fff8f3;border-color:#f6dcc8}
.lockbox{max-width:560px;margin:24px auto;text-align:center;border:1px solid var(--line);border-radius:16px;padding:28px 24px;background:#fff}
.lockbox .lk{font-size:34px}
.lockbox p{margin:8px 0 16px;color:var(--ink2)}
.lockbox .row{justify-content:center}
#lockmsg .lockbox{margin:0 0 18px;max-width:none}
.startrow{display:flex;gap:14px;flex-wrap:wrap;margin:22px 0 6px}
.start{flex:1 1 240px;display:flex;flex-direction:column;gap:2px;border:1px solid var(--line);border-radius:14px;padding:16px 18px;background:#fff}
.start b{font-size:18px}
.start span{color:var(--quiet);font-size:13.5px}
.start.stu{border-color:var(--brand-line);background:var(--brand-soft)}
.start:hover{border-color:var(--line-strong)}
/* 학생 입장 */
.joinw{max-width:760px}
.joincard{margin:40px 0;padding:28px}
.joincard h1{margin:0 0 4px;font-size:26px;letter-spacing:-.02em}
.codein{display:block;width:100%;max-width:340px;margin:16px 0;font:inherit;font-size:34px;font-weight:800;letter-spacing:.18em;text-align:center;border:2px solid var(--line-strong);border-radius:14px;padding:12px}
.codein:focus{outline:none;border-color:var(--brand2)}
.jerr{color:#b42318;font-weight:600;min-height:1em;margin:8px 0}
.nogrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(84px,1fr));gap:8px;margin:16px 0}
.nogrid button{border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 4px;display:flex;flex-direction:column;align-items:center}
.nogrid button b{font-size:22px}
.nogrid button small{color:var(--quiet);font-size:12px;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nogrid button.set{background:var(--bg)}
.nogrid button:hover{border-color:var(--brand2)}
.nick{display:flex;gap:10px;align-items:center;font-weight:700;margin:14px 0 4px}
.nick input{font:inherit;font-size:18px;border:2px solid var(--line-strong);border-radius:12px;padding:8px 12px;flex:1;max-width:320px}
.pwshow{display:flex;gap:10px;margin:12px 0}
.pwshow span{width:64px;height:64px;border:2px dashed var(--line-strong);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:38px}
.pwgrid{display:grid;grid-template-columns:repeat(3,84px);gap:10px;margin:8px 0 16px}
.pwgrid button{height:84px;font-size:44px;border:1px solid var(--line);background:#fff;border-radius:16px}
.pwgrid button:hover{border-color:var(--brand2);background:var(--brand-soft)}
/* 수업 관리 */
.tpage .group{display:none}
.thead{display:flex;align-items:baseline;gap:12px;padding:28px 0 8px}
.thead h1{margin:0;font-size:26px;letter-spacing:-.02em}
.tcard{padding:18px 20px;margin:14px 0}
.tcard h2{font-size:17px;margin:0}
.tcard summary{cursor:pointer}
.lic.warnc{border-color:#f6e7b8;background:#fffcf2}
.lic h2{margin-bottom:6px}
.licrow{display:flex;gap:28px;flex-wrap:wrap;align-items:center}
.licrow small{display:block;color:var(--quiet);font-size:12px}
.licrow b{font-size:20px}
.licrow details{margin-left:auto;font-size:13.5px}
.licf{display:flex;gap:8px;margin-top:10px}
.licf input{font:inherit;font-size:16px;letter-spacing:.06em;border:1px solid var(--line-strong);border-radius:10px;padding:8px 12px;width:260px;text-transform:uppercase}
table.mini{border-collapse:collapse;font-size:13px;margin-top:8px}
table.mini td,table.mini th{padding:5px 10px;border-bottom:1px solid var(--line-soft);text-align:left}
.ctabs{display:flex;gap:6px;flex-wrap:wrap;margin-top:18px}
.ctabs button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 16px;font-weight:600;font-size:14px;display:flex;align-items:center;gap:6px}
.ctabs button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.ctabs button.add{border-style:dashed;color:var(--quiet)}
.ctabs .live,.lv i{width:8px;height:8px;border-radius:50%;background:#16a34a;display:inline-block}
.cgrid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:14px}
.cgrid .tcard{margin:14px 0 0}
.runhead{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.runhead .grow{flex:1}
.state{font-size:13px;font-weight:700;color:var(--quiet)}
.state.on{color:#16a34a}
.codebox{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:16px 0 6px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--bg)}
.codebox small{color:var(--quiet);width:100%}
.bigcode{font-size:30px;font-weight:800;letter-spacing:.16em;margin-right:auto}
.urlrow{display:flex;gap:8px;align-items:center;font-size:12.5px}
.urlrow code{background:var(--bg);padding:4px 8px;border-radius:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.pickles{margin-top:16px;border-top:1px solid var(--line-soft);padding-top:12px}
.pickles small{color:var(--quiet);display:block;margin-bottom:6px}
select,.tcard input{font:inherit;font-size:14px;border:1px solid var(--line);border-radius:9px;padding:6px 8px;background:#fff;max-width:100%}
.livegrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:6px}
.livesum{grid-column:1/-1;font-size:13px;color:var(--ink2)}
.lv{display:flex;align-items:center;gap:6px;border:1px solid var(--line-soft);border-radius:10px;padding:6px 8px;font-size:13px;opacity:.55}
.lv.on{opacity:1;border-color:var(--line)}
.lv i{background:#cbd5e1;flex:none}
.lv.on i{background:#16a34a}
.lv span:not(.bar4):not(.clip){flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bar4{display:inline-flex;gap:2px}
.bar4 em{width:7px;height:7px;border-radius:2px;background:#e2e8f0}
.bar4 em.f{background:var(--brand2)}
.warnt{color:#b45309;font-weight:600}
.boardw{overflow:auto;max-height:70vh}
table.board{border-collapse:separate;border-spacing:0;font-size:13px}
table.board th,table.board td{border-bottom:1px solid var(--line-soft);padding:3px;text-align:center}
table.board thead th{position:sticky;top:0;background:#fff;z-index:1;font-weight:700;min-width:46px}
table.board thead th.na{color:var(--faint);font-weight:400}
table.board th.st{position:sticky;left:0;background:#fff;text-align:left;white-space:nowrap;padding-right:12px;z-index:2}
table.board th.st span{font-weight:400;color:var(--ink2)}
.cell{width:44px;height:38px;border:1px solid var(--line);border-radius:8px;background:#fff;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:0;font-size:11px}
.cell:hover{border-color:var(--brand2)}
.cell .clip{line-height:1}
.cell .rb{font-weight:700;font-size:10.5px}
.cell.r0{background:#fff4f2}.cell.r1{background:#f0fdf4}.cell.r2{background:var(--brand-soft)}
#modal .mback{position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:50;display:flex;align-items:flex-start;justify-content:center;overflow:auto;padding:5vh 16px}
.mbox{position:relative;background:#fff;border-radius:16px;padding:22px 24px;width:min(620px,100%)}
.mbox h3{margin:0 0 2px;font-size:20px}
.mbox h4{margin:18px 0 6px}
.mx{position:absolute;top:12px;right:12px;border:0;background:none;font-size:18px;color:var(--quiet)}
.mstg{display:flex;gap:6px}
.mstg span{font-size:12.5px;padding:3px 10px;border-radius:999px;background:var(--bg);color:var(--faint)}
.mstg span.f{background:var(--brand-soft);color:var(--ink)}
.msub{display:flex;gap:12px;align-items:flex-start;padding:8px 0;border-top:1px dashed var(--line)}
.msub img{width:96px;height:72px;object-fit:cover;border-radius:8px;border:1px solid var(--line)}
.msub p{margin:4px 0 0;color:var(--ink2)}
.rubsel{display:flex;gap:6px;margin-bottom:8px}
.rubsel button{flex:1;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px;font-weight:600}
.rubsel button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.mbox textarea{width:100%;min-height:70px;border:1px solid var(--line);border-radius:10px;padding:9px 12px;font:inherit;font-size:14px;margin-bottom:10px}
.bigshow{position:fixed;inset:0;z-index:60;background:#0f172a;color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;cursor:pointer;outline:none}
.bigshow small{font-size:24px;color:#cbd5e1}
.bigshow b{font-size:min(22vw,200px);letter-spacing:.12em;font-weight:800;line-height:1}
.bigshow span{font-size:24px;color:#e2e8f0}
.bigshow em{font-style:normal;color:#64748b;font-size:14px;margin-top:20px}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:10px 18px;border-radius:10px;z-index:70;font-size:14px}
.fb p{margin:6px 0 0}
@media (max-width:980px){.cgrid{grid-template-columns:1fr}.rcbar .who{display:none}}
@media (max-width:640px){.pwgrid{grid-template-columns:repeat(3,1fr)}.licrow details{margin-left:0}.top .group{display:none}}
.rcbar .btn{white-space:nowrap}
@media (max-width:640px){.logo .div,.logo .nm{display:none}.top .wrap{padding:0 14px;gap:10px}.rcbar a[href="join.html"]{display:none}}

/* 첫 화면 역할 버튼(학생·선생님) */
.tiles.roles{gap:28px}
.tile.role{width:260px}
.tile.role b{font-size:34px}
.tile.role .ic{width:84px;height:84px;border-radius:24px}
.tile.role.stu .ic{background:var(--brand-soft);border-color:var(--brand-line)}
.tile.role::after{background:var(--brand2)}
.home .manage{margin:34px 0 0}
@media (max-width:760px){.tile.role{width:calc(50% - 14px)}.tile.role b{font-size:26px}}

/* 확장 주제 색 */
:root{--board:#2563eb;--brick:#dc2626;--sensor:#0891b2;--linebot:#ca8a04;--cubelab:#4f46e5}
.tile.board::after,.bar.board::before,.chip.board::before{background:var(--board)}
.tile.brick::after,.bar.brick::before,.chip.brick::before{background:var(--brick)}
.tile.sensor::after,.bar.sensor::before,.chip.sensor::before{background:var(--sensor)}
.tile.linebot::after,.bar.linebot::before,.chip.linebot::before{background:var(--linebot)}
.tile.cubelab::after,.bar.cubelab::before,.chip.cubelab::before{background:var(--cubelab)}
.tile.pfb.board b,.tile.pfb.brick b,.tile.pfb.sensor b,.tile.pfb.linebot b,.tile.pfb.cubelab b{font-size:24px;line-height:1.25;text-align:center;word-break:keep-all}
:root{--entry:#16a34a;--mcoding:#eab308;--special:#db2777;--gquiz:#7c3aed}
.tile.entry::after,.bar.entry::before,.chip.entry::before{background:var(--entry)}
.tile.mcoding::after,.bar.mcoding::before,.chip.mcoding::before{background:var(--mcoding)}
.tile.special::after,.bar.special::before,.chip.special::before{background:var(--special)}
.tile.gquiz::after,.bar.gquiz::before,.chip.gquiz::before{background:var(--gquiz)}
.tile.pfb.entry b,.tile.pfb.mcoding b,.tile.pfb.special b,.tile.pfb.gquiz b{font-size:24px;line-height:1.25;text-align:center;word-break:keep-all}
:root{--prep:#64748b;--aifuse:#0d9488;--subj:#ea580c;--print3d:#9333ea}
.tile.prep::after,.bar.prep::before,.chip.prep::before{background:var(--prep)}
.tile.aifuse::after,.bar.aifuse::before,.chip.aifuse::before{background:var(--aifuse)}
.tile.subj::after,.bar.subj::before,.chip.subj::before{background:var(--subj)}
.tile.print3d::after,.bar.print3d::before,.chip.print3d::before{background:var(--print3d)}
.tile.pfb.prep b,.tile.pfb.aifuse b,.tile.pfb.subj b,.tile.pfb.print3d b{font-size:24px;line-height:1.25;text-align:center;word-break:keep-all}
.pfgrp{margin:26px 0 12px;font-size:14px;font-weight:700;color:var(--quiet);letter-spacing:.04em}
.pfgrp:first-of-type{margin-top:6px}
/* 언플러그드 도구 칸 */
.unplug{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;flex:1;padding:24px;text-align:center;color:var(--ink2)}
.unplug img{max-width:92%;max-height:60%;border-radius:12px;border:1px solid var(--line)}
/* 아두이노 코드 내려받기 버튼 */
.code .copy.dl{right:64px}
/* 센서 꽂기 애니메이션 */
.sanim{border:1px solid var(--line);border-radius:14px;padding:14px;margin:10px 0;background:#fff}
.sanim .stage{position:relative;height:150px;overflow:hidden;border-radius:10px;background:var(--bg)}
.sanim .cube{position:absolute;left:18%;top:20px;height:110px;border-radius:10px}
.sanim .port{position:absolute;left:calc(18% + 108px);top:8px;font-size:12px;color:var(--ink2);background:#fff;border:1px solid var(--line);border-radius:999px;padding:1px 8px}
.sanim .sen{position:absolute;top:35px;height:80px;left:calc(18% + 114px);border-radius:8px;box-shadow:var(--shadow-md);animation:plug 5s ease-in-out infinite}
.sanim .click{position:absolute;left:calc(18% + 200px);top:60px;font-weight:800;color:var(--ink);opacity:0;animation:clk 5s infinite}
.sanim .meter{display:flex;align-items:center;gap:10px;margin-top:12px;font-size:13px;color:var(--ink2)}
.sanim .meter .bar{flex:1;height:12px;border-radius:999px;background:var(--bg);border:1px solid var(--line);overflow:hidden}
.sanim .meter i{display:block;height:100%;width:8%;background:var(--sensor);border-radius:999px;animation:fillv 5s ease-in-out infinite}
.sanim .cap{margin:8px 0 0;font-size:13px;color:var(--ink2)}
@keyframes plug{0%{transform:translateX(260px);opacity:0}15%{opacity:1}40%,100%{transform:translateX(0);opacity:1}}
@keyframes clk{0%,38%{opacity:0}42%,55%{opacity:1}60%,100%{opacity:0}}
@keyframes fillv{0%,45%{width:8%}62%{width:78%}72%{width:35%}84%{width:92%}100%{width:20%}}
@media (prefers-reduced-motion:reduce){.sanim .sen,.sanim .click,.sanim .meter i{animation:none}.sanim .meter i{width:60%}}

/* 선생님 화면 주제 8개: 4개씩 두 줄 */
.tiles.pf8{display:grid;grid-template-columns:repeat(4,220px);justify-content:center;gap:22px}
.tiles.pf8 .tile{width:auto}
@media (max-width:1000px){.tiles.pf8{grid-template-columns:repeat(2,minmax(0,220px))}}
.tiles.pf8 .tile.pfb b{font-size:28px;line-height:1.25;text-align:center;word-break:keep-all}
@media (max-width:760px){.tiles.pf8{gap:12px}.tiles.pf8 .tile.pfb b{font-size:20px}.tiles.pf8 .tile .meta{font-size:11.5px;text-align:center;word-break:keep-all}}

/* MakeCode 조립 순서 */
.bk{border:1px solid var(--line);border-radius:12px;padding:10px 14px;margin:10px 0;background:#fff}
.bk>b{font-size:13px;color:var(--ink2)}
.bk ol{margin:6px 0 0;padding-left:20px}
.bk li{margin:5px 0;line-height:1.6}
.bk .cat{display:inline-block;color:#fff;font-size:12px;font-weight:700;border-radius:6px;padding:1px 8px;margin-right:6px}
.bk .bt{font-weight:600;color:var(--ink)}
.bk small{color:var(--ink2);margin-left:6px}
/* 블록 끌어 끼우기 애니메이션 */
.mkdrag{position:relative;display:grid;grid-template-columns:96px 1fr 1.25fr;gap:8px;border:1px solid var(--line);border-radius:14px;padding:12px;background:#fff;margin:10px 0;min-height:170px;overflow:hidden}
.mkdrag .pal{display:flex;flex-direction:column;gap:3px}
.mkdrag .pal span{font-size:12px;border-left:4px solid;padding:3px 8px;color:var(--ink);background:var(--bg);border-radius:0 6px 6px 0}
.mkdrag .pal span.on{background:#111;color:#fff;animation:palon 6s infinite}
.mkdrag .fly{background:#4b4b4b;border-radius:8px;padding:8px;display:flex;flex-direction:column;gap:6px;opacity:0;animation:fly 6s infinite}
.mkdrag .fly i{color:#fff;font-style:normal;font-weight:700;font-size:12px}
.mkdrag .blkm{display:inline-block;background:#111;color:#fff;font-size:11px;border-radius:6px;padding:6px 8px;line-height:1.3}
.mkdrag .ws{position:relative;background:#f2f4f8;border-radius:8px;padding:10px}
.mkdrag .hatm{display:block;width:max-content;background:#1e90ff;color:#fff;font-size:11px;border-radius:10px 10px 4px 4px;padding:6px 14px}
.mkdrag .mv{position:relative;animation:dragb 6s infinite}
.mkdrag .cap{grid-column:1/-1;margin:4px 0 0;font-size:13px;color:var(--ink2)}
@keyframes palon{0%,10%{outline:0}15%,30%{outline:3px solid #e03131}40%,100%{outline:0}}
@keyframes fly{0%,15%{opacity:0}22%,62%{opacity:1}70%,100%{opacity:0}}
@keyframes dragb{0%,30%{opacity:0;transform:translate(-120%,-10px)}35%{opacity:1;transform:translate(-110%,-10px)}60%{opacity:1;transform:translate(0,14px)}66%,100%{opacity:1;transform:translate(0,0)}}
@media (prefers-reduced-motion:reduce){.mkdrag *{animation:none!important;opacity:1!important}}

/* 아두이노(한 화면): 오른쪽 도구 없이 수업 내용을 가운데 넓게 */
.lesson.solo{grid-template-columns:minmax(0,1fr)}
.lesson.solo .tpane,.lesson.solo .split{display:none}
.lesson.solo .lpane{border-right:0;background:var(--bg)}
.lesson.solo .lhead,.lesson.solo .lbody{max-width:1080px;margin:0 auto;background:#fff}
.lesson.solo .lhead{border-bottom:0}
.lesson.solo .stepper{max-width:1080px;margin:0 auto}
.lesson.solo .lbody{min-height:calc(100vh - 200px)}
.lesson.solo .follow figure{height:max(300px,min(620px,calc(100vh - 300px)));max-height:max(300px,min(620px,calc(100vh - 300px)))}
.lesson.solo ~ .showtool{display:none!important}
/* 큐브이노 순서 띠: 업로드 → 꽂기 → 켜기 */
.seq{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:4px 0 10px;font-size:14px}
.seq span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 12px;font-weight:600}
.seq span.on{background:#1e2330;color:#fff;border-color:#1e2330}
.seq i{font-style:normal;color:var(--quiet)}
.hwire{width:100%;border-collapse:collapse;font-size:14px;margin:8px 0}
.hwire th,.hwire td{border:1px solid var(--line);padding:6px 10px;text-align:center}
.hwire th{background:var(--bg)}
.mgal{display:grid;grid-template-columns:repeat(auto-fill,minmax(420px,1fr));gap:12px;margin:14px 0}
.mgal figure{margin:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
.mgal img{display:block;width:100%;height:auto;cursor:zoom-in}
.mgal figcaption{font-size:13px;font-weight:600;padding:8px 10px;border-top:1px solid var(--line)}

.blk .v.dd{background:#0b8e69;color:#fff}.blk .v.dd::after{content:' ▾';font-size:.8em}
.blk:not(.robot) .v.dd{background:rgba(0,0,0,.18)}
.blk .rep{display:inline-block;border-radius:999px;padding:1px 8px;margin:0 2px;color:#fff;border:1px solid rgba(0,0,0,.15)}.blk .rep.robot{background:#0fbd8c}.blk .rep .v.dd{background:#0b8e69}

/* 작품 소개(showcase) */
.shkind{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;margin:14px 0 6px}
.shkind a{display:flex;gap:12px;align-items:center;padding:10px;text-decoration:none;color:inherit}
.shkind img{width:84px;height:64px;object-fit:contain;border-radius:8px;background:#fff;flex:none}
.shkind b{display:block;margin-bottom:2px}.shkind span{font-size:13px;color:var(--muted)}
.shh{margin:26px 0 10px;font-size:20px}
.showg{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.shc{overflow:hidden;display:flex;flex-direction:column;padding:0}
.shc img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;background:#f4f4f2;border-bottom:1px solid var(--line)}
.shc .b{padding:12px 14px 14px}.shc h4{margin:8px 0 6px;font-size:17px}.shc p{margin:0 0 8px;font-size:14px;line-height:1.6}
.shc .use{background:var(--bg2,#f6f7f9);border-radius:8px;padding:8px 10px;font-size:13px}.shc .use ul{margin:4px 0 0;padding-left:18px}
.shc .parts{font-size:12.5px;margin-top:8px}
.shbook{display:flex;gap:16px;align-items:center;padding:14px;margin-top:22px}.shbook img{width:110px;flex:none;border-radius:6px}
@media (max-width:640px){.showg{grid-template-columns:1fr}.shbook{flex-direction:column;align-items:flex-start}}

.ltable tr.sect td{background:var(--bg2,#f3f5f8);font-weight:700;font-size:14px;padding:10px 14px;border-top:2px solid var(--line)}
/* 태블릿용 컴팩트 (2026-10-13): 도구 주소줄·도움말 제거, 머리줄 작은 버튼 */
.toolbtns{display:flex;gap:6px;align-items:center}
.toolbtns:empty{display:none}
.lhead{padding:14px 24px 10px}
.lhead h1{font-size:22px;margin:4px 0 0}
.chead{padding:26px 0 18px}
.chead h1{margin:6px 0 4px;font-size:28px}
@media (max-width:980px){.toolbtns #hidetool{display:none}}

/* 실제 스크래치에서 뽑은 블록 그림 */
.sbimg{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-start}
.sbimg .sbsvg{display:block;max-width:100%;height:auto;box-sizing:border-box;background:#f9f9fb;border:1px solid var(--line);border-radius:12px;padding:12px}

/* ── 큰 글씨 차시 (차시 데이터 big:true) — 차분히 읽히도록 글자·여백 키움 ── */
body.big .lbody{font-size:18px;line-height:1.75}
body.big .lbody h3{font-size:20px}
body.big .box{font-size:17px;padding:16px 20px}
body.big .box h4{font-size:18px}
body.big .kv,body.big .flow .f,body.big .checks label,body.big .lv div{font-size:16px}
body.big .flow .f b,body.big .flow .f span{font-size:15px}
body.big .steps{gap:26px}
body.big .stepc{border-radius:16px}
body.big .stepc .sh{padding:16px 22px}
body.big .stepc .sh::before{width:30px;height:30px;font-size:15px}
body.big .stepc .sh b{font-size:21px}
body.big .stepc .sb{padding:18px 22px 22px}
body.big .stepc .sb>p{font-size:18px;margin:0 0 12px}
body.big .follow .fcap{font-size:18px}
body.big .ready b{font-size:19px}
body.big .ready li{font-size:17px}
/* 큰 번호 목록 */
.nums{list-style:none;padding:0;margin:4px 0 16px;display:grid;gap:14px;counter-reset:n}
.nums li{position:relative;padding-left:46px;min-height:32px;font-size:19px;line-height:1.5}
.nums li::before{counter-increment:n;content:counter(n);position:absolute;left:0;top:-1px;width:32px;height:32px;border-radius:50%;background:var(--ink);color:#fff;font-weight:700;font-size:16px;display:grid;place-items:center}
.nums.red li::before{background:#e11d2e}
.nums li small{display:block;font-size:16px;color:var(--quiet)}
/* 큰 카드 */
.bcards{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin:6px 0 16px}
.bcards>div{border:1px solid var(--line);border-radius:14px;padding:16px 18px;background:var(--bg)}
.bcards>div.hl{background:#fff7db;border-color:#f3dc8f}
.bcards b{display:block;font-size:21px;margin-bottom:6px;color:var(--ink)}
.bcards span{display:block;font-size:17px;color:var(--ink2);line-height:1.55}
/* 엔트리 화면 배치도 */
.edmap{display:grid;grid-template-columns:1fr 1fr;grid-template-areas:"st bl" "ob as";gap:8px;margin:8px 0 16px}
.edmap>div{border:2px solid var(--line-strong);border-radius:12px;padding:12px 14px;background:#fff;min-height:96px}
.edmap>div b{display:flex;align-items:center;gap:8px;font-size:18px}
.edmap>div b i{font-style:normal;width:26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;font-size:14px;display:grid;place-items:center;flex:none}
.edmap>div span{display:block;font-size:16px;color:var(--ink2);margin-top:4px;line-height:1.5}
.edmap .st{grid-area:st;background:#f1f8ec}.edmap .ob{grid-area:ob}.edmap .bl{grid-area:bl;background:#f7f8fb}.edmap .as{grid-area:as;background:#f4f9ff}
.edmap .go{grid-column:1/-1;display:flex;align-items:center;gap:12px;min-height:0;border-style:dashed}
.edmap .go span{margin:0}
.big-eq{font-size:20px;font-weight:700;text-align:center;padding:16px;border-radius:12px;background:#fff7db;border:1px solid #f3dc8f;margin:10px 0}
@media (max-width:480px){.edmap{grid-template-columns:1fr;grid-template-areas:"st" "ob" "bl" "as"}}

/* 큐브랩 실험 순서도 */
.xfig{margin:4px 0 10px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#f6f6fa}
.xfig img{display:block;width:100%;max-height:430px;object-fit:contain;cursor:zoom-in}
.xflow{list-style:none;counter-reset:xf;margin:0 0 10px;padding:0;display:flex;flex-direction:column;gap:18px}
.xflow li{counter-increment:xf;position:relative;display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:10px;background:#fff;padding:8px 12px;color:var(--ink)}
.xflow li::before{content:counter(xf);flex:none;width:24px;height:24px;border-radius:50%;background:var(--ink);color:#fff;font-weight:700;font-size:13px;display:grid;place-items:center}
.xflow li+li::after{content:'';position:absolute;left:23px;top:-17px;width:0;height:0;border-left:6px solid transparent;border-right:6px solid transparent;border-top:9px solid var(--quiet)}

/* 주제 타일 아이콘 */
.tile .pfi{width:76px;height:76px;flex:none}
.tiles.pf8 .tile{gap:8px}
@media (max-width:760px){.tile .pfi{width:52px;height:52px}}
/* 주제 타일: 모든 슬롯 같은 색 */
.tiles.pf8 .tile::after{background:var(--line-strong)!important}
/* 서브(플랫폼) 화면: 같은 톤 */
.pfh:has(.pfhi){display:flex;align-items:center;gap:16px}
.pfh .pfhi{width:64px;height:64px;flex:none}
.tile.lv::after{background:var(--line-strong)!important}
.tile.lv{gap:8px}
.pfh .pfhi+span{text-align:left}
.tile.lv{opacity:1;padding:18px;border:1px solid var(--line);border-radius:22px;font-size:inherit;flex-direction:column;justify-content:center}
.tile.lv .pfi{width:64px;height:64px}
.tile.lv b{font-size:20px}
/* 첫 화면 역할 타일 */
.tile.role .pfi{width:104px;height:104px}
.tile.role::after{background:var(--line-strong)!important}

/* 헤더 안 경로 */
.hcrumb{display:flex;align-items:baseline;min-width:0;margin-left:-10px}
.hcrumb .crumb{margin:0;font-size:14px;color:var(--quiet);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hcrumb .crumb::before{content:"›";margin-right:6px}
.hcrumb .crumb a{color:var(--ink2)}
.hcrumb .crumb a:hover{color:var(--ink)}
@media (max-width:640px){.hcrumb{display:none}}

/* 학년 레벨 맵: 슬롯 색을 한 가지로 통일 */
.ladder .bar::before{background:var(--brand-line)!important}
.ladder .bar:hover{border-color:var(--brand-line);background:var(--brand-soft)}
.ladder .bar:hover::before{background:var(--brand2)!important}

/* 전체메뉴: 피지컬 AI 정사각형 버튼 — 파이썬 칸 위, 머리줄과 칸 사이 가운데 */
.pfwrap{position:relative;width:max-content;max-width:100%;margin:0 auto}
.aibub{position:absolute;right:59px;top:-133px;z-index:2;width:102px;height:102px;box-sizing:border-box;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;border-radius:18px;background:#dfe3fb;border:1px solid #c3c9f4;color:var(--ink);transition:transform .15s,box-shadow .15s,border-color .15s}
.aibub img{width:56px;height:56px}
.aibub b{font-size:14px;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.aibub:hover{transform:translateY(-2px);border-color:var(--brand2);box-shadow:var(--shadow-md)}
@media (max-width:1000px){.aibub{right:calc(25% - 51px)}}
@media (max-width:760px){.aibub{position:relative;top:auto;right:auto;margin:-14px auto 18px}}
/* 피지컬 AI 화면 */
.tiles.ai4 .tile.on{border-color:var(--brand2);box-shadow:var(--shadow-md)}
.tiles.ai4 .tile .meta{text-align:center;word-break:keep-all}
.tiles.pf8 .tile.pfb.subj b{max-width:6em}

/* 미리보기(사용권 없음): 목록·개요 공개, 활동·미션·정리 잠김 · 교사 회원 1차시 체험 */
.pvband{margin:6px 0 2px;padding:7px 12px;border-radius:10px;background:var(--brand-soft);border:1px solid var(--brand-line);font-size:13.5px;color:var(--ink2)}
.pvband.trial{background:#effbf8;border-color:#c9efe6}
.pvband a{color:var(--brand);font-weight:600;white-space:nowrap}
.lesson.focus .pvband{display:none}
.stepper button:has(.lkic){position:relative}
.stepper .lkic{position:absolute;top:3px;right:6px;font-style:normal;font-size:10px;line-height:1;opacity:.65}
.pvlock{padding:8px 0}
.pvlock>p{text-align:center;color:var(--ink2);margin:8px 0 0}
.pvtag{display:inline-block;font-size:12px;color:var(--quiet);white-space:nowrap}
.pvtag.free{color:var(--ok);font-weight:600}
.lockbox .lknote{font-size:13px;color:var(--quiet);margin:14px 0 0;line-height:1.55}
tr.go .pvtag{cursor:pointer}
.bigshow .qr{background:#fff;padding:12px;border-radius:12px;line-height:0}
.bigshow .qr svg{width:min(34vh,260px);height:auto}

/* 확인 문제(정리 탭) — 글씨는 검정·회색, 맞고 틀림은 배경·테두리로만 */
.qz{display:grid;gap:10px}
.qi{border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:#fff}
.qi.right{border-color:#a7dcc9;background:#f3fbf7}
.qi.wrong{border-color:#f1c4bd;background:#fff7f5}
.qq{display:flex;gap:8px;align-items:flex-start;margin:0 0 9px;font-weight:600;color:var(--ink)}
.qq>b{flex:none;width:22px;height:22px;border-radius:50%;background:var(--ink);color:#fff;font-size:12.5px;display:inline-flex;align-items:center;justify-content:center;margin-top:1px}
.qq>span{flex:1}
.qq em{flex:none;font-style:normal;font-size:12.5px;font-weight:600;color:var(--ink2);border:1px solid var(--line-strong);background:#fff;border-radius:999px;padding:1px 9px}
.qq .say{flex:none;border:0;background:none;font-size:18px;padding:0;line-height:1;cursor:pointer}
.qo{display:flex;flex-wrap:wrap;gap:6px}
.qo button{border:1.5px solid var(--line);background:#fff;border-radius:10px;padding:7px 12px;font:inherit;font-size:14px;color:var(--ink);text-align:left;cursor:pointer;display:inline-flex;gap:7px;align-items:center}
.qo button i{font-style:normal;font-size:12px;font-weight:700;color:var(--quiet)}
.qo.ox button{min-width:64px;justify-content:center;font-size:18px;font-weight:700;padding:6px 0}
.qo.mc{flex-direction:column}
.qo button:not(:disabled):hover{border-color:var(--line-strong)}
.qo button.on{border-color:var(--ink);background:var(--bg)}
.qo button.ans{border-color:#4fb08f;background:#e6f6ef}
.qi.wrong .qo button.on:not(.ans){border-color:#e59a8e;background:#fdeceb}
.qo button:disabled{cursor:default}
.qe{margin:8px 0 0;font-size:13.5px;color:var(--ink2)}
.qsend,.qscore{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.qscore b{font-size:20px;color:var(--ink)}
.qscore span{color:var(--ink2);font-size:14px}
.qz .note{font-size:13px;margin:0}
body.young .qq{font-size:18px}
body.young .qo button{font-size:17px;padding:9px 14px}
body.young .qo.ox button{min-width:84px;font-size:26px}
.cell .qs{font-weight:700;font-size:10.5px;line-height:1}
.mquiz{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.cell{height:auto;min-height:38px;padding:3px 0}

.fnote{margin:6px 4px 2px;font-size:13.5px;line-height:1.55;color:var(--ink2)}.fnote ol{margin:0;padding-left:20px}.fnote li{margin:1px 0}.fnote p{margin:4px 0 0;color:var(--quiet)}