:root{--bg:#f6f8f7;--card:#fff;--ink:#1f2a24;--muted:#66736b;--line:#e1e7e3;--green:#0f9d58;--green-d:#0b7a44;--green-l:#e6f4ea;--red:#d93025;--red-l:#fce8e6;--amber:#f9ab00}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
.hidden{display:none!important}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 24px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.brand{font-weight:700;font-size:1.15rem;color:var(--ink);text-decoration:none}
.brand span{color:var(--green);font-weight:600;margin-left:4px}
.mainnav{display:flex;gap:20px;margin-left:auto;margin-right:20px}
.mainnav a{color:var(--ink);text-decoration:none;font-size:.92rem}
.mainnav a:hover{color:var(--green)}
@media(max-width:600px){.topbar{flex-wrap:wrap;gap:8px}.mainnav{order:3;width:100%;margin:0}}
.userbox{display:flex;align-items:center;gap:12px;font-size:.9rem;color:var(--muted)}
.btn{background:var(--green);color:#fff;border:0;border-radius:8px;padding:10px 18px;font-size:.95rem;cursor:pointer;font-weight:600;text-decoration:none;display:inline-block}
.btn:hover{background:var(--green-d)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--bg)}
.btn:disabled{opacity:.5;cursor:default}
#app{max-width:1500px;margin:0 auto;padding:28px 20px 60px}
h1{font-size:1.7rem;margin:0 0 6px}
h2{font-size:1.3rem;margin-top:0}
.mainnav{flex-wrap:wrap;row-gap:4px;gap:6px 18px}
.mainnav a{padding:6px 2px;border-bottom:3px solid transparent;white-space:nowrap}
.mainnav a.on{color:var(--accent,var(--green-d));font-weight:700;border-bottom-color:var(--accent,var(--green))}
.mainnav a small{margin-left:5px;font-size:.62rem;text-transform:uppercase;letter-spacing:.04em;background:var(--line);color:var(--muted);padding:1px 6px;border-radius:99px;vertical-align:middle}
.mainnav a.tlink{color:var(--green-d)}
.mainnav a.ext{color:var(--muted)}
.coursebar{background:#fff;border-bottom:3px solid var(--accent,var(--green))}
.cb-in{max-width:1500px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.cb-title{font-weight:700;font-size:1.05rem;color:var(--accent);padding:10px 0}
.cb-in a{padding:12px 4px 9px;color:var(--ink);text-decoration:none;font-size:.92rem;border-bottom:3px solid transparent;margin-bottom:-3px}
.cb-in a.on{font-weight:700;border-bottom-color:var(--accent)}
.card.course{border-top:5px solid var(--accent,var(--green))}
.gtag{display:inline-block;margin:3px 4px 0 0;padding:1px 8px;border-radius:99px;background:var(--green-l);color:var(--green-d);font-size:.72rem;font-weight:600}
.chiplabel{font-size:.8rem;color:var(--muted);align-self:center;margin-right:2px;min-width:44px}
.rosteradd,.infobox{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:18px}
.infobox{background:#f2f8ff;border-color:#cfe0f5}
.infobox ul{margin:6px 0 0;padding-left:20px;font-size:.92rem}
.rosteradd h3{margin:0 0 8px}
.rosteradd label{display:grid;gap:4px;font-size:.9rem;font-weight:600;margin-bottom:10px}
.rosteradd label small{font-weight:400;color:var(--muted)}
.rosteradd textarea,.rosteradd input:not([type=checkbox]){padding:9px 12px;border:1px solid var(--line);border-radius:8px;font-size:.95rem;font-family:inherit}
.rosterrow{display:flex;gap:24px;flex-wrap:wrap;align-items:flex-end;margin-bottom:8px}
.rosterrow>label{flex:1;min-width:200px}
.rosterchk{display:flex;gap:14px;flex-wrap:wrap;align-items:center;padding-bottom:12px;font-size:.9rem}
.rosterchk>span{font-weight:600}
.rosteradd .chk{margin:0;font-weight:400}
.ramsg{font-size:.9rem;color:var(--green-d);margin-left:10px}
.rosteradd .sm{font-size:.82rem;color:var(--muted);margin:10px 0 0}
.tv.roster input.rn,.tv.roster input.rg{padding:6px 8px;border:1px solid var(--line);border-radius:6px;font-size:.9rem;min-width:140px}
.tv.roster td.c{text-align:center}
.tv .saved{color:var(--green-d);font-size:.8rem;display:inline-block;min-width:60px}
.tv.sched input[type=date]{padding:6px 8px;border:1px solid var(--line);border-radius:6px;font-size:.92rem}
.tv-tools select{padding:8px 10px;border:1px solid var(--line);border-radius:8px;font-size:.95rem}
.tryit,.codebox{background:#1e2430;border-radius:12px;padding:0 0 14px;margin:18px 0;overflow:hidden}
.codebox{margin-bottom:10px}
.codehead{display:flex;justify-content:space-between;align-items:center;padding:9px 16px;background:#161b24;color:#cfd6e4;font-size:.85rem}
.codetag{background:#00599c;color:#fff;border-radius:99px;padding:1px 10px;font-size:.72rem;font-weight:700}
textarea.code{display:block;width:100%;box-sizing:border-box;min-height:110px;resize:vertical;border:0;outline:0;background:#1e2430;color:#e6edf7;font:15px/1.55 Consolas,"Courier New",monospace;padding:14px 16px;tab-size:2;white-space:pre}
textarea.code:focus{background:#222a38}
.codebtns{display:flex;gap:10px;align-items:center;padding:6px 16px 10px;flex-wrap:wrap}
.codebtns .btn{padding:8px 16px}
.codebtns .btn.ghost{color:#fff;border-color:rgba(255,255,255,.65)}
.codebtns .btn.ghost:hover{background:#fff;color:var(--ink)}
.codebtns .btn.ghost:disabled{opacity:.6}
.codebtns .linkbtn{color:#9fb3d1}
.codebtns .badge{background:#d6f5e0}
.outhead{padding:0 16px;color:#9fb3d1;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em}
pre.codeout{margin:6px 16px 0;background:#0f131a;color:#c9f5d4;border-radius:8px;padding:12px 14px;min-height:46px;white-space:pre-wrap;word-break:break-word;font:14px/1.5 Consolas,"Courier New",monospace}
pre.codeout.err{color:#ffb4ab}
.codebox #cfb{margin:10px 16px 0}
.codebox .result{margin:0}
.diff{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:10px;color:#cfd6e4;font-size:.85rem}
.diff pre.codeout{margin:4px 0 0}
@media(max-width:640px){.diff{grid-template-columns:1fr}}
details.hint,details.solution{margin:8px 0;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:var(--bg)}
details.solution pre.codeout{margin:8px 0 0}
details[hidden]{display:none}
@media(min-width:801px){.side{max-height:calc(100vh - 110px);overflow-y:auto}}
@media(max-width:800px){.layout{display:flex;flex-direction:column}.layout .main{order:-1;padding:18px}.side{position:static}}
.inhead{padding:6px 16px 4px;color:#9fb3d1;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;background:#161b24}
.inhead small{text-transform:none;letter-spacing:0;margin-left:6px;opacity:.8}
textarea.progin{display:block;width:100%;box-sizing:border-box;min-height:48px;resize:vertical;border:0;outline:0;background:#161b24;color:#ffe9a8;font:14px/1.5 Consolas,"Courier New",monospace;padding:6px 16px 10px;white-space:pre}
.steps .locked{display:flex;gap:10px;align-items:center;padding:9px 10px;border-radius:8px;color:#9aa5a0;font-size:.92rem;cursor:not-allowed}
.steps .locked .dot{background:none;border:0;font-size:.8rem}
.seqnote{font-size:.8rem;color:var(--muted);margin:10px 4px 0}
.content code{background:var(--bg)}
.printonly{display:none}
.tv.att th.d{text-align:center;min-width:54px}
.tv.att th.d small{font-weight:400}
.tv.att td.in{text-align:center;background:var(--green-l);color:var(--green-d);font-weight:600}
.tv.att td.in small{font-weight:400;color:var(--muted)}
.tv.att td.out{text-align:center;color:#c9a4a0;background:#fdf3f2}
.tv-tools input[type=date]{padding:7px 9px;border:1px solid var(--line);border-radius:8px;font-size:.92rem}
@media print{
  @page{size:A4 landscape;margin:12mm}
  body{background:#fff}
  .topbar,.coursebar,.pvbar,.noprint,.tv-tools,.chips,.btn,.back,.userbox,.sub.noprint{display:none!important}
  #app{max-width:none;padding:0}
  .printonly{display:block;margin:0 0 10px;color:#333;font-size:.95rem}
  .printonly.sign{margin-top:36px}
  h1{font-size:1.3rem;margin:0 0 4px}
  .tv-wrap{border:0;overflow:visible}
  .tv{font-size:.8rem}
  .tv th,.tv td{padding:4px 6px;border:1px solid #bbb;white-space:normal}
  .tv th{background:#eee!important;position:static}
  .tv .ghead td{background:#eee!important;color:#000}
  .tv .bar{display:none}
  .tv .detail{display:none}
  .tv.att td.out{background:#fff;color:#bbb}
  .tv.att td.in{background:#fff;color:#000}
  *{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}
.hello{font-size:1.15rem;font-weight:600;margin:0 0 14px}
.hello .grp{font-size:.8rem;font-weight:600;background:var(--green-l);color:var(--green-d);padding:2px 10px;border-radius:99px;margin-left:8px}
.herogrid{display:grid;grid-template-columns:minmax(0,2fr) minmax(280px,1fr);gap:20px;align-items:start}
@media(max-width:900px){.herogrid{grid-template-columns:1fr}}
.herocard{display:grid;grid-template-columns:1fr 230px;background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;min-height:250px}
@media(max-width:620px){.herocard{grid-template-columns:1fr}.heroart{display:none}}
.herotext{padding:26px 28px;display:flex;flex-direction:column;gap:6px}
.herokick{margin:0;font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:700}
.herotext h2{margin:0;font-size:1.7rem}
.herotext h2 a{color:var(--ink);text-decoration:none}
.herotext h2 a:hover{text-decoration:underline}
.heroprog{display:flex;align-items:center;gap:12px;margin:6px 0 10px;font-size:.85rem;color:var(--muted)}
.heroprog .bar{flex:1;max-width:260px}
.heroprog .bar i{background:var(--accent)}
.heronext{margin:0;font-size:1.05rem}
.herometa{margin:0 0 14px;color:var(--muted);font-size:.9rem}
.herotext .btn{align-self:flex-start;background:var(--accent)}
.heroart{background:linear-gradient(135deg,var(--accent),#1f2a24);display:grid;place-items:center}
.heroart span{font-size:4.2rem;font-weight:800;color:#fff;opacity:.92;letter-spacing:-2px}
.sidecards{display:grid;gap:14px}
.scard{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.scard h4{margin:0 0 8px;font-size:1rem}
.scard .sm{margin:6px 0;font-size:.85rem;color:var(--muted)}
.goal{margin:0;display:flex;align-items:center;gap:10px;font-size:.95rem}
.star{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--bg);color:#bbb;font-size:1.1rem;flex:none}
.star.on{background:#fff3c4;color:#f9ab00}
.wk{display:flex;gap:6px;margin:8px 0}
.wk span{flex:1;height:34px;border:1px solid var(--line);border-radius:8px;display:grid;place-items:center;font-size:.78rem;color:var(--muted)}
.wk span.on{background:var(--green-l);border-color:var(--green);color:var(--green-d);font-weight:700}
.wk span.today{outline:2px solid var(--green);outline-offset:1px}
.upcoming{list-style:none;margin:0;padding:0;font-size:.88rem}
.upcoming li{padding:5px 0;border-bottom:1px solid var(--line)}
.upcoming li:last-child{border:0}
.sect{margin:34px 0 14px;font-size:1.25rem}
.lockmsg{background:#fff3c4;border-radius:8px;padding:6px 10px;font-size:.85rem;font-weight:600;color:#7a5b00}
.lockmsg.soft{background:var(--bg);color:var(--muted);font-weight:500}
.card.locked{background:var(--bg)}
.cardbtns{display:flex;gap:10px}
.cardbtns .btn{flex:1;text-align:center}
.morecourses{margin:22px 0 0}
.mainnav a.browse{color:var(--green-d)}
.card.soon{opacity:.8}
.badge.soonb{background:var(--line);color:var(--muted)}
.soonbox{background:var(--card);border:1px dashed var(--line);border-radius:12px;padding:28px;max-width:560px}
.soonbox p{color:var(--muted)}
.coursetag{color:var(--muted);font-weight:500;font-size:.7em}
@media(max-width:700px){.topbar{flex-wrap:wrap}.mainnav{order:3;width:100%;margin:0;overflow-x:auto;flex-wrap:nowrap}}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.chip{border:1px solid var(--line);background:var(--card);border-radius:99px;padding:6px 14px;font-size:.88rem;cursor:pointer;color:var(--ink)}
.chip:hover{background:var(--green-l)}
.chip.on{background:var(--green);border-color:var(--green);color:#fff;font-weight:600}
.chk{display:flex;align-items:center;gap:6px;font-size:.92rem;color:var(--muted)}
.tv .ghead td{background:var(--green-l);color:var(--green-d);position:sticky;left:0}
.tv-tools{align-items:center}
.or{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:.85rem;margin:18px 0 12px}
.or::before,.or::after{content:"";flex:1;height:1px;background:var(--line)}
.tabs{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;margin-bottom:14px}
.tabs button{flex:1;border:0;background:var(--bg);padding:9px;cursor:pointer;font-size:.92rem;color:var(--muted)}
.tabs button.on{background:var(--green-l);color:var(--green-d);font-weight:700}
.authform{display:grid;gap:12px;text-align:left}
.authform label{display:grid;gap:4px;font-size:.88rem;color:var(--muted)}
.authform input{padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-size:1rem;color:var(--ink)}
.authform input:focus{outline:2px solid var(--green);border-color:var(--green)}
.autherr{color:var(--red);font-size:.88rem;min-height:1.2em;margin:0}
.linkbtn{background:none;border:0;color:var(--green-d);cursor:pointer;text-decoration:underline;font-size:.88rem;padding:0}
.notice{background:#fff8e1;border:1px solid #f3d98b;border-radius:10px;padding:10px 16px;margin-bottom:16px;font-size:.92rem}
.login{max-width:440px}
.tv-tools{display:flex;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.tv-tools .upd{color:#667085;font-size:.85rem;white-space:nowrap}
.tv-tools input{flex:1;min-width:220px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;font-size:.95rem}
.tv-tools input[type=checkbox]{flex:none;min-width:0;width:auto;margin:0}
.tv-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--line);border-radius:12px}
.tv{border-collapse:collapse;width:100%;font-size:.92rem}
.tv th,.tv td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;white-space:nowrap}
.tv th{background:var(--bg);position:sticky;top:0}
.tv th.sortable{cursor:pointer;user-select:none}
.tv small{display:block;color:var(--muted);font-size:.78rem;font-weight:400}
.tv .srow{cursor:pointer}
.tv .srow:hover{background:var(--green-l)}
.tv .bar{height:6px;margin-top:4px;min-width:70px}
.tv .detail td{background:var(--bg);white-space:normal}
.tv-mod{display:inline-block;vertical-align:top;margin:6px 24px 10px 0;min-width:260px}
.tv-mod ul{list-style:none;margin:6px 0 0;padding:0}
.tv-mod li{color:var(--muted);padding:1px 0}
.tv-mod li.ok{color:var(--ink)}
.tv-mod li.ok::first-letter{color:var(--green-d)}
.brand{white-space:nowrap}
.brand a{color:var(--ink);text-decoration:none}
.brand a.brandsub{color:var(--green);font-weight:600;margin-left:4px}
.brand a:hover{text-decoration:underline}
.pvbar{background:#fff3c4;border-bottom:2px solid #f9ab00;padding:8px 20px;font-size:.92rem;display:flex;gap:14px;align-items:center;flex-wrap:wrap;justify-content:center}
.pvbar b{color:#7a5b00}
.pct{color:var(--green-d);font-size:1.25rem}
.sub{color:var(--muted);margin:0 0 24px}
.login{max-width:420px;margin:80px auto;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:36px;text-align:center}
.login p{color:var(--muted)}
.note{font-size:.82rem;color:var(--muted);margin-top:16px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;display:flex;flex-direction:column;gap:10px}
.card h3{margin:0}
.card p{margin:0;color:var(--muted);font-size:.93rem;flex:1}
.bar{height:8px;background:var(--line);border-radius:99px;overflow:hidden}
.bar>i{display:block;height:100%;background:var(--green);border-radius:99px;transition:width .3s}
.meta{display:flex;justify-content:space-between;font-size:.82rem;color:var(--muted)}
.layout{display:grid;grid-template-columns:290px 1fr;gap:24px;align-items:start}
@media(max-width:800px){.layout{grid-template-columns:1fr}}
.side{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;position:sticky;top:76px}
.side h3{margin:0 0 4px;font-size:1rem}
.side .bar{margin:8px 0 12px}
.steps{list-style:none;padding:0;margin:0}
.steps a{display:flex;gap:10px;align-items:center;padding:9px 10px;border-radius:8px;color:var(--ink);text-decoration:none;font-size:.92rem}
.steps a:hover{background:var(--bg)}
.steps a.cur{background:var(--green-l);font-weight:600}
.dot{flex:none;width:20px;height:20px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-size:.7rem;color:#fff}
.dot.done{background:var(--green);border-color:var(--green)}
.tag{margin-left:auto;font-size:.68rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.main{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:28px}
.content img{max-width:100%;height:auto;display:block}
.content figure{margin:18px 0;padding:0}
.content figure img{border:1px solid var(--line);border-radius:10px}
.content figcaption{font-size:.85rem;color:var(--muted);margin-top:6px;text-align:center}
.content table{border-collapse:collapse;margin:14px 0}
.content td,.content th{border:1px solid var(--line);padding:6px 12px}
.content th{background:var(--green-l)}
.content blockquote{margin:16px 0;padding:12px 16px;background:var(--green-l);border-left:4px solid var(--green);border-radius:6px}
.content details{margin:10px 0;padding:10px 14px;border:1px solid var(--line);border-radius:8px}
.content summary{cursor:pointer;font-weight:600;color:var(--green-d)}
.content h3{margin-top:26px}
.content table{display:block;overflow-x:auto}
.dl{background:#fff8e1;border:1px solid #f3d98b;border-radius:10px;padding:12px 16px;margin-bottom:18px}
.dl ul{list-style:none;margin:8px 0 0;padding:0}
.dl li{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:6px 0}
.dl li span{color:var(--muted);font-size:.88rem}
.tasks{display:grid;gap:8px;margin:10px 0}
.task{display:flex;gap:10px;align-items:flex-start;padding:10px 14px;border:1px solid var(--line);border-radius:8px;cursor:pointer;background:var(--bg)}
.task:has(input:checked){background:var(--green-l);border-color:var(--green)}
.task input{margin-top:5px;width:18px;height:18px;flex:none}
.drill{margin:14px 0}
.dq{font-size:1.2rem;margin:0 0 4px}
.dmsg{min-height:1.5em;color:var(--muted);margin:0 0 10px}
.dgrid{border-collapse:collapse;margin:0 0 14px;display:table!important}
.dgrid th,.dgrid td{border:1px solid var(--line);padding:10px 18px;min-width:90px;text-align:center}
.dgrid th{background:var(--bg);color:var(--muted)}
.dgrid td{cursor:pointer;user-select:none}
.dgrid td:hover{background:var(--green-l)}
.dgrid td.ok{background:var(--green);color:#fff}
.dgrid td.bad{background:var(--red);color:#fff}
.words td:nth-child(2){font-size:1.05rem}
.content h3 small{font-weight:400;color:var(--muted);font-size:.85em}
.content pre.csv{background:#1f2a24;color:#e6f4ea;padding:12px 16px;border-radius:8px;overflow-x:auto;font-size:.95rem}
.content code{background:var(--bg);padding:2px 6px;border-radius:4px;font-size:.92em}
.video{position:relative;padding-top:56.25%;background:#111;border-radius:10px;overflow:hidden;margin-bottom:16px}
.video iframe,.video div{position:absolute;inset:0;width:100%;height:100%;border:0}
.video div{display:grid;place-items:center;color:#aaa;text-align:center;padding:20px}
.q{border:1px solid var(--line);border-radius:10px;padding:16px;margin-bottom:14px}
.q.ok{border-color:var(--green);background:var(--green-l)}
.q.bad{border-color:var(--red);background:var(--red-l)}
.q p{margin:0 0 8px;font-weight:600}
.q label{display:block;padding:5px 0;cursor:pointer}
.q .why{font-size:.88rem;color:var(--muted);margin-top:8px}
.q .why.good{color:var(--green);font-weight:600}
.q .why.bad{color:var(--red)}
.taskcheck{margin-top:18px}
.result{padding:14px 16px;border-radius:10px;margin:16px 0;font-weight:600}
.result.pass{background:var(--green-l);color:var(--green-d)}
.result.fail{background:var(--red-l);color:var(--red)}
.nav{display:flex;justify-content:space-between;margin-top:26px;gap:10px;flex-wrap:wrap}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.badge{display:inline-block;background:var(--green-l);color:var(--green-d);border-radius:99px;padding:2px 10px;font-size:.78rem;font-weight:600}
.back{display:inline-block;margin-bottom:14px;color:var(--muted);text-decoration:none;font-size:.9rem}

/* HTML live preview */
.previewbox{margin:8px 16px 0}
.prevhead{color:#9fb3d1;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px}
.prevhost{background:#fff;border-radius:8px;min-height:120px;overflow:hidden}
.prevempty{margin:0;padding:18px 14px;color:#6b7280;font-size:.9rem}
iframe.preview{display:block;width:100%;height:300px;border:0;background:#fff}
.fakebar{background:#dfe3ea;padding:6px 10px 0;display:flex}
.faketab{background:#fff;border-radius:8px 8px 0 0;padding:6px 14px;font-size:.8rem;color:#1f2933;max-width:70%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;border:1px solid #c9ced8;border-bottom:0}
.faketab::before{content:"\1F5CE  ";color:#6b7280}
.faketab i{color:#6b7280}

/* Colour lab */
.clab{background:#1e2430;border-radius:12px;padding:0 0 14px;margin:18px 0;overflow:hidden;color:#e7ecf4}
.clabhead{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;color:#e7ecf4}
.clabbody{padding:0 16px}
.clabsw{height:96px;border-radius:10px;border:2px solid rgba(255,255,255,.25)}
.clabsl{margin-top:12px;display:grid;gap:10px}
.clabrow{display:grid;grid-template-columns:92px 1fr 54px;align-items:center;gap:10px;font-size:.9rem}
.clabrow input[type=range]{-webkit-appearance:none;appearance:none;height:14px;border-radius:7px;border:1px solid rgba(255,255,255,.3);width:100%}
.clabrow input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:#fff;border:2px solid #333;cursor:pointer}
.clabrow input[type=range]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:#fff;border:2px solid #333;cursor:pointer}
.clabrow output{text-align:right;font-variant-numeric:tabular-nums}
.clabread{margin-top:10px;font:13px Consolas,"Courier New",monospace;color:#c9f5d4}
.mixlist{display:flex;flex-wrap:wrap;gap:6px;padding:0 16px 8px}
.mixchip{font-size:.78rem;padding:3px 10px;border-radius:12px;background:#2c3445;color:#aeb8cc}
.mixchip.ok{background:#1f7a4d;color:#fff}
.mixchip.now{background:#fff;color:#1e2430;font-weight:700}
.mixask{padding:0 16px;margin:4px 0 10px}
.mixhint{color:#aeb8cc;font-size:.88rem}
.clabbtns{display:flex;align-items:center;gap:12px;padding:12px 16px 0}
.mixbad{color:#ffb4ab}
@media(max-width:560px){.clabrow{grid-template-columns:74px 1fr 46px}}
.mixbase{display:flex;align-items:center;gap:10px;padding:0 16px 10px;font-size:.9rem;color:#c9d3e6}
.mixbasesw{width:54px;height:30px;border-radius:6px;border:2px solid rgba(255,255,255,.35);display:inline-block}

/* Scenario */
.scen{background:var(--card,#fff);border:1px solid var(--line,#dde3ea);border-radius:12px;padding:16px;margin:16px 0}
.scenhead{font-weight:700;color:var(--green,#1f7a4d);margin-bottom:10px}
.scenmsg{background:#eef3f8;border-left:4px solid #6b8bb0;border-radius:8px;padding:10px 14px;margin:8px 0 12px;font-size:.95rem}
.scenfrom{font-size:.78rem;color:#5b6b7e;margin-bottom:4px;font-weight:600}
.scentext{margin:8px 0 12px}
.scenchoices{display:grid;gap:8px}
.scenbtn{text-align:left;padding:12px 14px;border:2px solid var(--line,#dde3ea);border-radius:10px;background:#fff;font-size:.95rem;cursor:pointer}
.scenbtn:hover:not(:disabled){border-color:var(--green,#1f7a4d)}
.scenbtn.bad{background:#fdecea;border-color:#e57368;color:#7a1f16;text-decoration:line-through}
.scenbtn.good{background:#e6f5ec;border-color:#1f7a4d}
.scenbtn:disabled{cursor:default}
.scenfb{margin-top:12px;padding:12px 14px;border-radius:10px}
.scenfb.bad{background:#fdecea;color:#7a1f16}
.scenfb.good{background:#e6f5ec;color:#14532d}
.pwwarn{padding:0 16px;margin:0 0 8px;color:#ffd9a8;font-size:.9rem}
.pwin{width:100%;box-sizing:border-box;padding:12px 14px;border-radius:8px;border:2px solid rgba(255,255,255,.3);background:#0f131a;color:#fff;font:16px Consolas,'Courier New',monospace}
.pwbar{height:10px;background:#2c3445;border-radius:5px;margin-top:10px;overflow:hidden}
.pwbar i{display:block;height:100%;width:0;transition:width .15s}
.hsbox{padding:0 16px}
.hsbox svg{display:block;width:100%;max-width:600px;margin:0 auto;background:#e8eef5;border-radius:10px}
.hs [data-part]{cursor:pointer}
.hs [data-part]:hover{stroke:#f5a623;stroke-width:3}
.hs [data-part].found{stroke:#1f7a4d;stroke-width:4}
.hsname{color:#c9f5d4}
.sortitem{font-size:1.25rem;font-weight:700;margin:6px 0 4px}
.sortcats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px}
.sortbtn{text-align:center}

/* Mouse trainer */
.mtarena{position:relative;margin:0 16px;height:260px;background:#e8eef5;border-radius:10px;overflow:hidden;user-select:none;touch-action:none}
.mttarget{position:absolute;width:58px;height:58px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:26px}
.mttarget.click{background:#1f7a4d;border-radius:50%}
.mttarget.dblclick{background:#f5a623;clip-path:polygon(50% 0,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%)}
.mttarget.rightclick{background:#7b4fd8;border-radius:8px}
.mtball{position:absolute;width:48px;height:48px;border-radius:50%;background:#e4572e;cursor:grab;touch-action:none;border:3px solid #fff;box-shadow:0 2px 6px rgba(0,0,0,.3)}
.mtball.grab{cursor:grabbing}
.mtbox{position:absolute;width:150px;height:100px;border:3px dashed #1f7a4d;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#1f7a4d;font-weight:700}
.mtarena.mtscrollarena{touch-action:auto;user-select:text}
.mtscroll{height:100%;overflow-y:auto;padding:10px 16px;background:#fff}
.mtscroll p{margin:0 0 14px}
/* Typing trainer */
.typtext{font:22px/1.6 Consolas,"Courier New",monospace;background:#0f131a;border-radius:8px;padding:12px 14px;margin-bottom:10px;word-break:break-all}
.typtext span{color:#6b7a8f}
.typtext span.ok{color:#7be0b0}
.typtext span.bad{color:#fff;background:#c0392b;border-radius:3px}
.typtext span.cur{color:#fff;border-bottom:3px solid #f5a623}
.kbd{margin:12px 0 4px;display:grid;gap:4px;justify-items:center}
.kbdrow{display:flex;gap:4px}
.kbdrow.r1{margin-left:14px}.kbdrow.r2{margin-left:28px}.kbdrow.r3{margin-left:0}
.key{min-width:30px;height:30px;padding:0 4px;border-radius:6px;background:#2c3445;color:#cfd6e4;display:inline-flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:600;box-sizing:border-box}
.key.wide{min-width:60px}.key.space{min-width:220px}
.key.p1{background:#4a3560}.key.r1{background:#2f5a73}.key.m1{background:#2f6b4f}.key.i1{background:#6b5a2f}.key.i2{background:#6b4a2f}.key.m2{background:#2f6b4f}.key.r2{background:#2f5a73}.key.p2{background:#4a3560}
.key.next{background:#f5a623;color:#1e2430;transform:translateY(-2px)}
@media(max-width:620px){.key{min-width:22px;height:26px;font-size:.7rem}.key.wide{min-width:44px}.key.space{min-width:150px}.typtext{font-size:17px}}
.clabbtns .btn.ghost{color:#fff;border-color:rgba(255,255,255,.65)}
.clabbtns .btn.ghost:hover{background:#fff;color:#1e2430}

/* Mini document editor */
.ed{background:var(--card,#fff);border:1px solid var(--line,#dde3ea);border-radius:12px;margin:18px 0;overflow:hidden}
.edtools{display:flex;flex-wrap:wrap;gap:6px;padding:8px;background:#edf2fa;border-bottom:1px solid #d3deee}
.edtools button,.edtools select{height:32px;border:1px solid #c5d0e0;border-radius:6px;background:#fff;font-size:.85rem;padding:0 8px;cursor:pointer;color:#1f2937}
.edtools button:hover,.edtools select:hover{background:#e3ecfb}
.edpage{background:#fff;min-height:200px;padding:22px 28px;font:11pt/1.4 Arial,sans-serif;color:#000;outline:none;margin:14px;border:1px solid #d9dee6;box-shadow:0 1px 4px rgba(0,0,0,.12)}
.edpage h1{font-size:20pt;margin:12px 0 4px}.edpage h2{font-size:16pt;margin:10px 0 4px}.edpage h3{font-size:13pt;margin:8px 0 4px}.edpage p{margin:0 0 8px}
.edpage ul,.edpage ol{margin:0 0 8px;padding-left:28px}
.edtasks{list-style:none;margin:0;padding:6px 16px 4px}
.edtasks li{padding:5px 0;color:var(--muted,#566)}
.edtasks li.ok{color:#14532d}
.edtick{display:inline-block;width:20px;font-weight:700}
.ed .clabbtns{padding:8px 16px 14px}
.ed .btn.ghost{color:var(--ink,#1f2933);border-color:var(--line,#c8d0da)}
.edpage table.edtable{border-collapse:collapse;width:100%;margin:6px 0 10px}
.edpage table.edtable td,.edpage table td,.edpage table th{border:1px solid #9aa5b4;padding:6px 8px;min-width:60px}
.edpage img{max-width:100%;vertical-align:middle}
.edpage img.picked{outline:3px solid #1a73e8}
.edpage .edheader,.edpage .edfooter{font-size:9pt;color:#5f6368;border:1px dashed #bdc1c6;padding:4px 8px;margin:0 0 12px;background:#fafafa}
.edpage .edfooter{margin:12px 0 0;text-align:center}
.edpage hr.pagebreak{border:0;border-top:2px dashed #1a73e8;margin:16px 0;position:relative}
.edpage hr.pagebreak::after{content:"page break";position:absolute;top:-10px;right:0;background:#fff;color:#1a73e8;font-size:8pt;padding:0 6px}
.edpage .toc{background:#f8f9fa;border:1px solid #dadce0;padding:8px 14px;margin:8px 0}
.edpage .toc ul{list-style:none;padding:0;margin:0}.edpage .toc li.h2{padding-left:18px}.edpage .toc li.h3{padding-left:36px}.edpage .toc a{color:#1a73e8}
.edpage p.edfn{font-size:9pt;border-top:1px solid #dadce0;margin-top:14px;padding-top:4px}
.edpage sup.fn{color:#1a73e8;font-weight:700}
.edpage .cmt{background:#fff3b0;border-bottom:2px solid #f9ab00}
.edpage .cmt.resolved{background:none;border-bottom:0}
.edcomments{padding:4px 16px;font-size:.9rem}
.edcm{background:#fffbe6;border-left:4px solid #f9ab00;padding:6px 10px;margin:6px 0;border-radius:4px}
.edcm .btn{height:26px;padding:0 10px;font-size:.8rem;margin-left:8px}
.rev{background:var(--card,#fff);border:1px solid var(--line,#dde3ea);border-radius:12px;margin:18px 0;padding:14px}
.revdoc{background:#fff;border:1px solid #d9dee6;padding:16px 22px;font:11pt/1.5 Arial,sans-serif;box-shadow:0 1px 4px rgba(0,0,0,.1);margin-bottom:12px}
.revdoc p{margin:0 0 8px}
.revdoc del{color:#c5221f;text-decoration:line-through;background:#fce8e6}
.revdoc ins{color:#137333;text-decoration:underline;background:#e6f4ea}
.revcard{border:1px solid var(--line,#dde3ea);border-radius:8px;padding:8px 12px;margin-bottom:8px}
.revcard.dn{background:#f0faf3}
.revbtns{display:flex;gap:8px;margin-top:6px}
.revok{color:#14532d;margin-top:4px;font-size:.92rem}
.revfoot{margin-top:6px}
.slm{border:1px solid var(--line,#dde3ea);border-radius:12px;margin:18px 0;overflow:hidden;background:var(--card,#fff)}
.slbar{display:flex;flex-wrap:wrap;gap:6px;padding:8px;background:#edf2fa;border-bottom:1px solid #dadce0}
.slbar select,.slbar button{height:30px;border:1px solid #c4c7c5;border-radius:6px;background:#fff;color:#202124;padding:0 8px;font-size:.85rem;cursor:pointer}
.slbar .slpresent{background:#1a73e8;color:#fff;border-color:#1a73e8;margin-left:auto}
.slwrap{display:flex;gap:0;background:#f1f3f4}
.slfilm{width:150px;flex:none;overflow:auto;max-height:420px;padding:8px;border-right:1px solid #dadce0}
.slthumb{display:flex;gap:6px;background:#fff;border:2px solid #dadce0;border-radius:6px;padding:6px;margin-bottom:8px;cursor:pointer;color:#202124}
.slthumb.on{border-color:#f9ab00}
.slthumb .n{font-size:.75rem;color:#5f6368}
.slthumb .m{font-size:.78rem;line-height:1.2;min-width:0;overflow:hidden}.slthumb small{display:block;color:#5f6368;font-size:.68rem}
.slmain{flex:1;min-width:0;padding:10px}
.slcanvas{container-type:inline-size;box-shadow:0 1px 5px rgba(0,0,0,.25)}
.sl{aspect-ratio:16/9;position:relative;padding:5cqw 6cqw;overflow:hidden;display:flex;flex-direction:column;gap:2cqw;font-family:Arial,sans-serif}
.sl input,.sl textarea{background:transparent;border:1px dashed rgba(128,128,128,.5);color:inherit;font:inherit;width:100%;padding:.5cqw;resize:none}
.sl-t{font-size:4.6cqw;font-weight:700}.sl-t.big{font-size:7cqw;text-align:center;margin-top:8cqw}
.sl-title .sl-s{font-size:3.4cqw;text-align:center}
.sl-b{font-size:3cqw;flex:1;margin:0;padding-left:3.5cqw}
.sl textarea.sl-b{padding-left:.5cqw}
.sl-cols{display:flex;gap:3cqw;flex:1}.sl-cols>*{flex:1}
.sl-pic{position:absolute;right:4cqw;bottom:4cqw;width:24cqw;border-radius:6px}
.slnotes{width:100%;margin-top:8px;border:1px solid #c4c7c5;border-radius:6px;padding:6px;font:inherit;font-size:.9rem;background:#fff;color:#202124}
.slshow{position:fixed;inset:0;z-index:9999;background:#000;display:flex;flex-direction:column;align-items:center;justify-content:center;outline:0}
.slshowbox{width:min(96vw,170vh);container-type:inline-size}
.slshow .sl{font-size:inherit}.slshow ul{margin:0;padding-left:3.5cqw}.slshow .sl-t,.slshow .sl-s{border:0}
.slshowhint{color:#bbb;margin-top:10px;font-size:.85rem}
@media(max-width:620px){.slwrap{flex-direction:column}.slfilm{width:auto;display:flex;gap:6px;max-height:none;border-right:0;border-bottom:1px solid #dadce0}.slthumb{margin:0;min-width:110px}}
@keyframes slfade{from{opacity:0}to{opacity:1}}@keyframes slfly{from{transform:translateX(-30%);opacity:0}to{transform:none;opacity:1}}@keyframes slin{from{transform:translateX(100%)}to{transform:none}}
.tr-fade{animation:slfade .8s}.tr-slide{animation:slin .5s}
.an-fade .sl-b,.an-fade .sl-s{animation:slfade 1.4s .3s both}.an-fly .sl-b,.an-fly .sl-s{animation:slfly .9s .3s both}
.slshownotes{color:#fff;background:#333;padding:8px 14px;border-radius:8px;margin-top:10px;max-width:90vw}

/* Spreadsheet practice box (sheetlab) */
.shl{background:var(--card,#fff);border:1px solid var(--line,#dde3ea);border-radius:12px;margin:18px 0;overflow:hidden}
.shl-bar{display:flex;align-items:center;gap:8px;padding:8px;background:#edf2fa;border-bottom:1px solid #d3deee}
.shl-name{width:84px;flex:none;height:34px;border:1px solid #c5d0e0;border-radius:6px;padding:0 8px;font-size:16px;font-family:inherit;text-align:center;background:#fff;color:#1f2937}
.shl-fx{font-style:italic;font-weight:700;color:#5f6368;flex:none}
.shl-formula{flex:1;min-width:0;height:34px;border:1px solid #c5d0e0;border-radius:6px;padding:0 10px;font-size:16px;font-family:Consolas,Menlo,monospace;background:#fff;color:#1f2937}
.shl-formula:read-only{background:#f1f3f4}
.shl-wrap{overflow-x:auto;background:#fff;-webkit-overflow-scrolling:touch}
.shl-grid{border-collapse:collapse;table-layout:fixed;font:15px/1.2 Arial,sans-serif;color:#202124;outline:none;user-select:none;-webkit-user-select:none}
.shl-grid th{background:#f8f9fa;color:#5f6368;font-weight:600;font-size:.8rem;border:1px solid #dadce0;padding:5px 2px;text-align:center}
.shl-grid td{position:relative;border:1px solid #e1e3e6;height:30px;padding:0 6px;background:#fff;cursor:cell}
.shl-t{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.shl-grid td.k-n .shl-t{text-align:right}
.shl-grid td.k-b .shl-t{text-align:center}
.shl-grid td.k-e .shl-t{color:#c5221f}
.shl-grid td.lk{background:#f6f7f8;color:#3c4043}
.shl-grid td.sel{background:#e8f0fe}
.shl-grid td.fp{background:#d2e3fc;outline:1px dashed #1a73e8;outline-offset:-1px}
.shl-grid td.act{background:#fff;outline:2px solid #1a73e8;outline-offset:-2px;z-index:1}
.shl-grid:focus-visible td.act{outline-width:3px}
.shl-grid td.shl-editing{padding:0;z-index:2}
.shl-grid td.shl-editing .shl-t{visibility:hidden}
.shl-cell{position:absolute;inset:0;width:100%;height:100%;box-sizing:border-box;border:2px solid #1a73e8;padding:0 5px;font-size:16px;font-family:Arial,sans-serif;background:#fff;color:#202124;outline:none;user-select:text;-webkit-user-select:text}
.shl-handle{position:absolute;right:-4px;bottom:-4px;width:8px;height:8px;background:#1a73e8;border:1px solid #fff;cursor:crosshair;z-index:3}
.shl-help{margin:8px 16px 0;color:var(--muted,#566);font-size:.88rem}
.shl-status{margin:4px 16px 0;min-height:1.2em;color:var(--muted,#566);font-size:.88rem}
.shl-ok{margin:4px 16px;padding:8px 12px;background:var(--green-l,#e6f4ea);color:#14532d;border-radius:8px;font-weight:600}
.shl-ok[hidden]{display:none}
.shl .clabbtns{padding:8px 16px 14px}
.shl .btn.ghost{color:var(--ink,#1f2933);border-color:var(--line,#c8d0da)}
.shl .btn[hidden]{display:none}
.shl-tools{display:flex;flex-wrap:wrap;gap:8px;padding:6px 8px;background:#edf2fa;border-bottom:1px solid #d3deee}
.shl-tools[hidden]{display:none}
.shl-tools button{height:36px;border:1px solid #c5d0e0;border-radius:6px;background:#fff;color:#1f2937;font-size:.9rem;padding:0 14px;cursor:pointer}
.shl-sr{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media(pointer:coarse){.shl-name,.shl-formula{height:44px}.shl-tools button{min-height:44px}.shl .clabbtns .btn{min-height:44px}}
@media(max-width:620px){.shl-bar{padding:6px}.shl-name{width:64px}.shl-grid td{height:36px}}
.fm{background:#f0ebf8;border:1px solid #dadce0;border-radius:12px;margin:18px 0;padding:12px;color:#202124}
.fmbar{display:flex;gap:8px;align-items:center;margin-bottom:10px;flex-wrap:wrap}.fmsent{color:#137333;font-size:.9rem}
.fmhead,.fmq{background:#fff;border:1px solid #dadce0;border-radius:8px;padding:12px 14px;margin-bottom:10px}
.fmhead{border-top:8px solid #673ab7}
.fm input:not([type=checkbox]):not([type=radio]),.fm textarea,.fm select{font:inherit;border:1px solid #c4c7c5;border-radius:6px;padding:6px 8px;background:#fff;color:#202124;max-width:100%}
.fmtitle{width:100%;font-size:1.4rem!important;border:0!important;border-bottom:1px solid #c4c7c5!important;border-radius:0!important}
.fmdesc,.fm .fmq textarea{width:100%;margin-top:6px}
.fmrow{display:flex;gap:8px;flex-wrap:wrap}.fmqt{flex:1;min-width:180px}
.fmkey,.fmfoot{margin-top:8px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}.fmfoot button{border:1px solid #c4c7c5;background:#fff;border-radius:6px;padding:3px 8px;cursor:pointer;color:#202124}
.fmquiz{display:block;margin-top:8px}
.fmqt2{font-weight:600;margin-bottom:6px}.fmopt{display:block;margin:4px 0}
.fmscale{display:flex;gap:14px;text-align:center}.fmin{width:100%}
.fmresult{margin-top:8px}
.fm .edtasks,.fm .edtasks li{color:#202124}.fm .mixhint{color:#5f6368}.fm .clabbtns .btn{opacity:1}
.wl{border:1px solid var(--line,#dde3ea);border-radius:12px;margin:18px 0;padding:12px;background:var(--card,#fff);color:inherit}
.wl-desk{position:relative;aspect-ratio:16/9;min-height:230px;border-radius:8px;overflow:hidden;font-family:"Segoe UI",Arial,sans-serif;color:#fff}
.wl-icons{position:absolute;left:10px;top:10px;display:flex;flex-direction:column;gap:10px}
.wl-ic{width:64px;text-align:center;font-size:.68rem;text-shadow:0 1px 2px #000}.wl-ic span{display:block;font-size:1.5rem}
.wl-toast{position:absolute;right:10px;bottom:52px;background:rgba(32,32,32,.92);color:#fff;border-radius:8px;padding:8px 12px;font-size:.75rem;max-width:180px}
.wl-bar{position:absolute;left:0;right:0;bottom:0;height:42px;background:rgba(243,243,243,.92);color:#202020;display:flex;align-items:center;justify-content:space-between;padding:0 10px}
.wl-bar.dk{background:rgba(32,32,32,.94);color:#fff}
.wl-left{width:90px;font-size:.72rem}.wl-w{display:inline-block}
.wl-mid{flex:1;display:flex;justify-content:center;align-items:center;gap:6px}.wl-mid.l{justify-content:flex-start}
.wl-startbtn{font-size:1.5rem;cursor:pointer;line-height:1}
.wl-app{position:relative;width:30px;height:30px;border-radius:6px;background:rgba(128,128,128,.25);display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:.8rem}
.wl-app i{position:absolute;bottom:2px;left:9px;right:9px;height:3px;border-radius:2px}
.wl-sbox{background:rgba(128,128,128,.25);border-radius:14px;padding:4px 14px;font-size:.75rem}
.wl-tray{font-size:.7rem;white-space:nowrap}
.wl-start{position:absolute;bottom:50px;left:50%;transform:translateX(-50%);width:200px;background:rgba(243,243,243,.97);color:#202020;border-radius:10px;padding:10px;box-shadow:0 4px 18px rgba(0,0,0,.4)}
.wl-start.l{left:10px;transform:none}.wl-start.dk{background:rgba(44,44,44,.97);color:#fff}
.wl-sg{display:flex;gap:6px;margin:8px 0}.wl-sg span{width:30px;height:30px;border-radius:6px;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.wl-set{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;margin-top:12px;font-size:.88rem}
.wl-set h4{margin:0 0 6px}.wl-set label{display:block;margin:4px 0}.wl-set select{font:inherit}
.wl-walls button,.wl-acc button{width:34px;height:34px;border-radius:6px;border:2px solid transparent;cursor:pointer;margin-right:6px}
.wl-acc button{width:24px;height:24px;border-radius:50%}
.wl-walls button.on,.wl-acc button.on{border-color:#f9ab00;box-shadow:0 0 0 2px #fff,0 0 0 4px #f9ab00}
.wl-pin{display:inline-block!important;margin-right:8px!important}
.fx{border:1px solid #c4c7c5;border-radius:10px;margin:18px 0;background:#f9f9f9;color:#202020;font-family:"Segoe UI",Arial,sans-serif;font-size:.88rem;overflow:hidden}
.fxtools{display:flex;flex-wrap:wrap;gap:6px;align-items:center;padding:8px;background:#f3f3f3;border-bottom:1px solid #e0e0e0}
.fxtools button,.fxaddr button{border:1px solid #c4c7c5;background:#fff;border-radius:6px;padding:4px 9px;cursor:pointer;color:#202020;font:inherit}
.fxtools label{margin-left:6px}.fxtools select{font:inherit}
.fxaddr{display:flex;gap:8px;align-items:center;padding:6px 8px;border-bottom:1px solid #e0e0e0}
.fxpath{flex:1;background:#fff;border:1px solid #d0d0d0;border-radius:6px;padding:4px 10px}
.fxaddr input{width:150px;border:1px solid #c4c7c5;border-radius:6px;padding:4px 8px;font:inherit;background:#fff;color:#202020}
.fxmain{display:flex;min-height:200px}
.fxnav{width:140px;flex:none;background:#fff;border-right:1px solid #e0e0e0;padding:6px}
.fxnav div{padding:5px 8px;border-radius:6px;cursor:pointer}.fxnav .on{background:#dbeafe;font-weight:600}
.fxlist{flex:1;min-width:0;background:#fff}
.fxrow{display:grid;grid-template-columns:2fr 1.4fr .7fr;gap:8px;padding:5px 10px;cursor:default;user-select:none}
.fxrow.sel{background:#cce4f7}.fxhead{font-weight:600;border-bottom:1px solid #e0e0e0;color:#555}
.fxempty{padding:18px;color:#777}
.fxstat{padding:6px 10px;border-top:1px solid #e0e0e0;background:#f3f3f3;font-size:.8rem}
.fx .edtasks{padding:8px 16px;background:#fff;color:#202020}.fx .edtasks li{color:#202020}.fx .mixhint{color:#666}
.fx .clabbtns{padding:0 12px 12px;background:#fff}
@media(max-width:620px){.fxmain{flex-direction:column}.fxnav{width:auto;display:flex;flex-wrap:wrap;border-right:0;border-bottom:1px solid #e0e0e0}.fxrow{grid-template-columns:2fr 1fr}.fxrow span:nth-child(3){display:none}}
.st{display:grid;grid-template-columns:200px 1fr;grid-template-rows:1fr auto;border:1px solid #c4c7c5;border-radius:10px;margin:18px 0;background:#f9f9f9;color:#202020;font-family:"Segoe UI",Arial,sans-serif;overflow:hidden}
.st-nav{background:#f0f0f0;padding:8px;display:flex;flex-direction:column;gap:2px;grid-row:1}
.st-nav button{text-align:left;border:0;background:none;padding:8px 10px;border-radius:6px;font:inherit;font-size:.84rem;cursor:pointer;color:#202020}
.st-nav button.on{background:#e0e0e0;font-weight:700;box-shadow:inset 3px 0 #0067c0}
.st-main{padding:14px 18px;min-height:280px}.st-main h4{margin:0 0 10px;font-size:1.2em}
.st-main.hc{background:#000;color:#ffff00}.st-main.hc .st-note{background:#000;border-color:#ffff00;color:#ffff00}
.st-row{display:flex;justify-content:space-between;align-items:center;gap:12px;background:#fff;border:1px solid #e0e0e0;border-radius:6px;padding:8px 12px;margin:6px 0}
.st-main.hc .st-row{background:#000;border-color:#ffff00}
.st-row select{font:inherit;max-width:60%}.st-row input[type=range]{width:45%}.st-tg{width:20px;height:20px}
.st-note{background:#fff;border:1px dashed #c4c7c5;border-radius:6px;padding:8px 12px;margin:6px 0;font-size:.95em}.st-note small{display:block;color:#707070;margin-top:4px}
.st-bar{grid-column:1/3;background:#202020;color:#fff;padding:6px 14px;display:flex;justify-content:flex-end;gap:16px;font-size:.78rem}
.st .edtasks,.st+.edtasks{color:#202124}
@media(max-width:600px){.st{grid-template-columns:1fr}.st-nav{flex-direction:row;flex-wrap:wrap}.st-bar{grid-column:1}}
.ap-card{display:flex;justify-content:space-between;align-items:center;gap:12px;background:#fff;border:1px solid #e0e0e0;border-radius:8px;padding:10px 12px;margin:8px 0;color:#202020}
.ap-card small{color:#606060}.ap-st{color:#c77700}
.ap-q{width:100%;box-sizing:border-box;padding:8px 14px;border:1px solid #c0c0c0;border-radius:16px;font:inherit;margin-bottom:6px}
.ws-scr{position:relative;aspect-ratio:16/9;min-height:200px;background:linear-gradient(135deg,#3b82f6,#a78bfa 60%,#f9a8d4);border-radius:8px;overflow:hidden;margin-bottom:10px}
.ws-w{position:absolute;box-sizing:border-box;border:2px solid #fff;border-radius:6px;color:#fff;padding:6px;font-size:.8rem;overflow:hidden;transition:all .25s}
.ws-tb{position:absolute;left:0;right:0;bottom:0;height:26px;background:rgba(32,32,32,.9);display:flex;gap:6px;align-items:center;padding:0 8px}.ws-tb span{color:#fff;font-size:.68rem;background:rgba(255,255,255,.2);padding:2px 8px;border-radius:4px}.ws-tb span.m{opacity:.5}
.dv .st-row input[type=number]{font:inherit}
.hl-bar{height:10px;background:#e0e0e0;border-radius:5px;margin:6px 0;overflow:hidden}.hl-bar i{display:block;height:100%;background:#0067c0}

/* ---- animated stroke order (js/strokeorder.js) ---- */
.strokebtn{background:transparent;border:1px solid var(--line);border-radius:6px;color:var(--muted);cursor:pointer;font-size:.72rem;line-height:1.2;padding:3px 6px;margin-top:3px;white-space:nowrap}
.strokebtn:hover,.kbtn:hover{background:var(--green-l);color:var(--green-d);border-color:var(--green)}
.kbtn{background:transparent;border:1px solid transparent;border-radius:8px;cursor:pointer;font:inherit;color:inherit;padding:0 6px}
.so-overlay{position:fixed;inset:0;background:rgba(20,30,25,.55);display:flex;align-items:center;justify-content:center;z-index:50;padding:14px}
.so-overlay[hidden]{display:none}
.so-box{background:#fff;border-radius:14px;max-width:360px;width:100%;padding:14px 16px 12px;box-shadow:0 10px 40px rgba(0,0,0,.3)}
.so-head{display:flex;justify-content:space-between;align-items:center;font-size:1.05rem;margin-bottom:6px}
.so-x{background:transparent;border:0;font-size:1.6rem;line-height:1;cursor:pointer;color:var(--muted)}
.so-stage{border:1px solid var(--line);border-radius:10px;background:#fcfdfc}
.so-svg{display:block;width:100%;height:auto;max-height:46vh}
.so-count{text-align:center;color:var(--muted);font-size:.88rem;margin:6px 0 2px;min-height:1.4em}
.so-ctl{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center;margin:6px 0}
.so-ctl .btn{padding:7px 12px;font-size:.9rem}
.so-speed{font-size:.85rem;color:var(--muted)}
.so-speed select{font:inherit;margin-left:4px}
.so-credit{font-size:.72rem;color:var(--muted);margin:6px 0 0;text-align:center}

/* ---- beta notice and report line (courses with notice / reportUrl in data/courses.js) ---- */
.betabox{background:#fff8e1;border:1px solid #f0d98a;border-radius:10px;padding:10px 14px;margin:10px 0 14px;font-size:.92rem;color:#5b4a00}
.betabox a{color:#8a5a00;font-weight:600}
.reportline{margin:14px 0 0;font-size:.85rem;color:var(--muted)}
.reportline a{color:var(--green-d);font-weight:600}

.card img.cover{width:calc(100% + 40px);margin:-20px -20px 4px;aspect-ratio:16/9;object-fit:cover;border-radius:12px 12px 0 0;display:block}

/* ---- Chinese course: tone colours for pinyin (data/chinese-audio.js, zpy) ---- */
.tn{font-weight:600}
.tn1{color:#c92a2a}.tn2{color:#2b8a3e}.tn3{color:#1971c2}.tn4{color:#862e9c}.tn5{color:#6c757d}
.hz{font-size:1.1em;line-height:1.2;padding:0 7px;vertical-align:baseline}
.hzb{font-size:1.5em;line-height:1.3;padding:2px 12px}

.gl-search{width:100%;max-width:420px;padding:10px 12px;font-size:16px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:inherit}
.gl-list{margin:0}.gl-letter{margin:22px 0 6px;color:var(--accent,var(--green));border-bottom:2px solid var(--line);padding-bottom:4px}
.gl-item{padding:8px 0;border-bottom:1px solid var(--line)}.gl-item dt{font-weight:700}.gl-item dd{margin:2px 0 0}
.gl-mod{font-weight:400;font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:10px;padding:1px 7px;margin-left:6px}
.gl-ex{display:block;color:var(--muted);font-size:14px;margin-top:2px}

/* mock test: intro box, section heading of a question group, reading passage */
.mock-intro{background:#f3f6fb;border:1px solid #d5deea;border-radius:8px;padding:10px 14px;margin:10px 0}
.mock-head{font-weight:700;margin:18px 0 6px;padding:6px 10px;background:#eef2f7;border-left:4px solid #c92a2a;border-radius:4px}
.mock-passage{white-space:pre-line;font-size:1.1em;line-height:1.8;background:#fffdf5;border:1px solid #e6dfc8;border-radius:8px;padding:10px 14px;margin:8px 0}