:root{
  --paper:#EDF0EE; --sheet:#FAFBFA; --sunk:#E3E8E6; --hover:#E5EAE8;
  --ink:#1B2631; --ink-2:#4D5B68; --ink-3:#77848F;
  --rule:#C9D2CF; --rule-2:#DCE2E0;
  --accent:#2944C2; --accent-2:#1F36A3; --accent-soft:#E0E6FA; --on-accent:#FFFFFF;
  --pass:#18794E; --pass-soft:#DAF0E4; --fail:#B42318; --fail-soft:#FADFDB; --wait:#8F5800; --wait-soft:#F7E9CC;
  --c-kw:#2944C2; --c-str:#18794E; --c-num:#A13E00; --c-com:#7B8893; --c-def:#1B2631; --c-prop:#5B3A9E;
  --sel:#D5DDF8; --overlay:rgba(27,38,49,.38);
  --f-ui:"Instrument Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --f-read:"Newsreader", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --f-code:"JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#11171C; --sheet:#172028; --sunk:#0D1317; --hover:#1D2831;
    --ink:#DCE3E7; --ink-2:#9AA8B3; --ink-3:#6E7D89;
    --rule:#2B3741; --rule-2:#222D36;
    --accent:#8FA3FF; --accent-2:#B0BFFF; --accent-soft:#222C52; --on-accent:#0D1330;
    --pass:#4CC38A; --pass-soft:#15352A; --fail:#F27A6E; --fail-soft:#3D1F1C; --wait:#E5B54A; --wait-soft:#382C13;
    --c-kw:#9FB0FF; --c-str:#6FD3A0; --c-num:#F0A36E; --c-com:#6E7D89; --c-def:#E7ECEF; --c-prop:#C9AEFF;
    --sel:#2A3766; --overlay:rgba(0,0,0,.55);
    color-scheme: dark;
  }
}
:root[data-theme="dark"]{
  --paper:#11171C; --sheet:#172028; --sunk:#0D1317; --hover:#1D2831;
  --ink:#DCE3E7; --ink-2:#9AA8B3; --ink-3:#6E7D89;
  --rule:#2B3741; --rule-2:#222D36;
  --accent:#8FA3FF; --accent-2:#B0BFFF; --accent-soft:#222C52; --on-accent:#0D1330;
  --pass:#4CC38A; --pass-soft:#15352A; --fail:#F27A6E; --fail-soft:#3D1F1C; --wait:#E5B54A; --wait-soft:#382C13;
  --c-kw:#9FB0FF; --c-str:#6FD3A0; --c-num:#F0A36E; --c-com:#6E7D89; --c-def:#E7ECEF; --c-prop:#C9AEFF;
  --sel:#2A3766; --overlay:rgba(0,0,0,.55);
  color-scheme: dark;
}
*,*::before,*::after{box-sizing:border-box}
html{height:100%;scroll-padding-top:env(safe-area-inset-top,0px)}
body{height:100%;margin:0;background:var(--paper);color:var(--ink);font:15px/1.45 var(--f-ui);-webkit-font-smoothing:antialiased;display:flex;flex-direction:column}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
img{max-width:100%}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- top bar ---------- */
.top{flex:0 0 auto;display:flex;align-items:center;gap:28px;padding:0 20px;height:54px;border-bottom:1px solid var(--rule);background:var(--paper);position:relative;z-index:5}
.brand{font:600 23px/1 var(--f-read);letter-spacing:-.015em;white-space:nowrap;display:flex;align-items:center;gap:10px}
.brand-mark{width:30px;height:30px;flex:0 0 auto;padding:3px;box-sizing:border-box;object-fit:contain;background:#fff;border-radius:7px}
.landing-card .brand-mark{width:44px;height:44px;padding:5px;border-radius:10px;margin-bottom:14px;display:block;border:1px solid var(--rule-2)}
.nav{display:flex;gap:4px;height:100%;overflow-x:auto;scrollbar-width:none}
.nav button{border:0;background:none;padding:0 12px;height:100%;font-weight:500;font-size:14px;color:var(--ink-2);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}
.nav button:hover{color:var(--ink)}
.nav button[aria-current="page"]{color:var(--ink);border-bottom-color:var(--accent)}
.nav .count{display:inline-block;min-width:18px;padding:0 5px;margin-left:6px;border-radius:9px;background:var(--wait-soft);color:var(--wait);font-size:12px;font-weight:600;line-height:18px;text-align:center}
.who{margin-left:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-2);white-space:nowrap}
.who img{width:26px;height:26px;border-radius:50%;object-fit:cover;background:var(--sunk)}
.who b{color:var(--ink);font-weight:500}
.badge{display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:5px;background:var(--sunk);color:var(--ink-2);font-size:12px;font-weight:500}
.badge.accent{background:var(--accent-soft);color:var(--accent)}

main{flex:1 1 auto;min-height:0;display:flex;flex-direction:column}

/* ---------- buttons & fields ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:34px;padding:0 14px;border-radius:6px;border:1px solid var(--rule);background:var(--sheet);color:var(--ink);font-weight:500;font-size:14px;cursor:pointer;white-space:nowrap;transition:background .12s,border-color .12s}
.btn:hover{background:var(--hover)}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.btn.primary:hover{background:var(--accent-2);border-color:var(--accent-2)}
.btn.quiet{border-color:transparent;background:transparent;color:var(--ink-2)}
.btn.quiet:hover{background:var(--hover);color:var(--ink)}
.btn.danger{color:var(--fail)}
.btn.primary.danger-fill{background:var(--fail);border-color:var(--fail);color:#fff}
.btn.sm{height:28px;padding:0 10px;font-size:13px}
.btn .kbd{font-size:11px;opacity:.7;font-weight:400}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field>span{font-size:13px;font-weight:500;color:var(--ink-2)}
.field small{font-size:12px;color:var(--ink-3)}
.input,.select,.textarea{width:100%;border:1px solid var(--rule);background:var(--sheet);border-radius:6px;padding:8px 10px;font-size:14px;line-height:1.4}
.select{appearance:none;padding-right:30px;background-image:linear-gradient(45deg,transparent 50%,var(--ink-2) 50%),linear-gradient(135deg,var(--ink-2) 50%,transparent 50%);background-position:calc(100% - 15px) 52%,calc(100% - 10px) 52%;background-size:5px 5px;background-repeat:no-repeat}
.input:focus,.select:focus,.textarea:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:var(--accent)}
.textarea{resize:vertical;min-height:72px}
.mono{font-family:var(--f-code);font-size:13px}
.switch{display:inline-flex;align-items:center;gap:8px;cursor:pointer;font-size:13px;color:var(--ink-2);user-select:none}
.switch input{appearance:none;width:32px;height:18px;border-radius:9px;background:var(--rule);position:relative;cursor:pointer;margin:0;flex:0 0 auto;transition:background .15s}
.switch input::after{content:"";position:absolute;top:2px;left:2px;width:14px;height:14px;border-radius:50%;background:var(--sheet);transition:transform .15s}
.switch input:checked{background:var(--pass)}
.switch input:checked::after{transform:translateX(14px)}
.seg{display:inline-flex;border:1px solid var(--rule);border-radius:6px;overflow:hidden}
.seg button{border:0;background:var(--sheet);padding:0 12px;height:30px;font-size:13px;cursor:pointer;color:var(--ink-2)}
.seg button+button{border-left:1px solid var(--rule)}
.seg button[aria-pressed="true"]{background:var(--accent-soft);color:var(--accent);font-weight:500}

/* ---------- difficulty ---------- */
.diff{font-weight:600;font-size:13px}
.diff.easy{color:var(--pass)} .diff.medium{color:var(--wait)} .diff.hard{color:var(--fail)}
.tag{font-size:12px;color:var(--ink-2);background:var(--sunk);border-radius:4px;padding:2px 7px}

/* ---------- workspace ---------- */
.ws{flex:1;min-height:0;display:flex;flex-direction:column;padding:0 10px 10px}
.preview-note{margin:10px 2px 0;padding:8px 12px;border-radius:8px;background:var(--accent-soft);color:var(--ink);font-size:13px}
.ws-tabs{display:flex;gap:2px;padding:10px 2px 0;overflow-x:auto;scrollbar-width:thin;flex:0 0 auto}
.ws-tab{display:flex;align-items:center;gap:9px;border:1px solid transparent;border-bottom:0;background:none;padding:8px 14px 9px;border-radius:8px 8px 0 0;cursor:pointer;color:var(--ink-2);white-space:nowrap;font-size:14px;position:relative}
.ws-tab:hover{color:var(--ink);background:var(--hover)}
.ws-tab[aria-selected="true"]{background:var(--sheet);border-color:var(--rule);color:var(--ink);font-weight:500}
.ws-tab[aria-selected="true"]::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--sheet)}
.ws-tab .n{font-family:var(--f-read);font-size:15px;color:var(--ink-3);font-weight:500}
.ws-tab .st{width:8px;height:8px;border-radius:2px;background:var(--rule)}
.ws-tab .st.pass{background:var(--pass)} .ws-tab .st.fail{background:var(--fail)} .ws-tab .st.wait{background:var(--wait)}
.ws-split{--left:42%;flex:1;min-height:0;display:flex;border:1px solid var(--rule);border-radius:0 10px 10px 10px;background:var(--rule);overflow:hidden}
.ws-split.first-tab-off{border-radius:10px}
.pane{background:var(--sheet);min-width:0;min-height:0}
.statement{flex:0 0 var(--left);overflow:auto}
.work{--con:38%;flex:1 1 0;display:flex;flex-direction:column}
.gutter{flex:0 0 auto;background:var(--paper);position:relative;touch-action:none}
.gutter.v{width:7px;cursor:col-resize}
.gutter.h{height:7px;cursor:row-resize;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.gutter.v{border-left:1px solid var(--rule);border-right:1px solid var(--rule)}
.gutter::after{content:"";position:absolute;background:var(--rule);border-radius:2px;transition:background .12s}
.gutter.v::after{width:3px;height:28px;top:50%;left:1px;margin-top:-14px}
.gutter.h::after{height:3px;width:28px;left:50%;top:1px;margin-left:-14px}
.gutter:hover::after,.gutter:focus-visible::after{background:var(--accent)}

.st-inner{padding:26px 30px 40px;max-width:760px}
.st-title{font:500 31px/1.15 var(--f-read);letter-spacing:-.01em;margin:0 0 10px}
.st-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:22px}
.prose{font:400 18px/1.62 var(--f-read);color:var(--ink)}
.prose p{margin:0 0 .85em}
.prose h3,.prose h4,.prose h2{font:600 18px/1.3 var(--f-read);margin:1.4em 0 .5em}
.prose ul,.prose ol{margin:0 0 .9em;padding-left:1.3em}
.prose li{margin:.2em 0}
.prose code,.ex code,.inline-code{font-family:var(--f-code);font-size:.8em;background:var(--sunk);border-radius:4px;padding:.12em .38em;white-space:pre-wrap;word-break:break-word}
.prose pre{background:var(--sunk);border-radius:8px;padding:12px 14px;overflow-x:auto;font-size:14px}
.prose pre code{background:none;padding:0;font-size:13px}
.st-h{font:600 19px/1.3 var(--f-read);margin:28px 0 12px}
.example{margin:0 0 14px;padding:12px 16px;border-left:3px solid var(--rule);background:var(--paper);border-radius:0 8px 8px 0}
.example figcaption{font-weight:600;font-size:13px;margin-bottom:6px;color:var(--ink-2)}
.ex-row{display:grid;grid-template-columns:88px 1fr;gap:10px;align-items:baseline;font-size:14px;margin:3px 0}
.ex-k{color:var(--ink-2);font-size:13px}
.ex code{background:none;padding:0;font-size:13px}
.st-foot{margin-top:24px;padding-top:14px;border-top:1px solid var(--rule-2);font-size:14px;color:var(--ink-2)}

.ed-head{display:flex;align-items:center;gap:10px;padding:0 10px 0 14px;height:42px;border-bottom:1px solid var(--rule-2);flex:0 0 auto}
.ed-head .lang{font-weight:600;font-size:13px}
.ed-head .save{font-size:12px;color:var(--ink-3);margin-left:auto}
.ed-head .save.bad{color:var(--fail)}
.ed-host{flex:1 1 0;min-height:80px;position:relative}
.ed-host>.CodeMirror,.ed-host>textarea{position:absolute;inset:0;height:auto!important;width:100%}
.console{flex:0 0 var(--con);min-height:120px;display:flex;flex-direction:column;background:var(--sheet)}
.con-head{display:flex;align-items:center;gap:8px;padding:0 10px 0 6px;height:46px;border-bottom:1px solid var(--rule-2);flex:0 0 auto}
.con-tabs{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none}
.con-tabs button{border:0;background:none;padding:6px 10px;border-radius:6px;color:var(--ink-2);font-size:13.5px;font-weight:500;cursor:pointer;white-space:nowrap}
.con-tabs button:hover{background:var(--hover);color:var(--ink)}
.con-tabs button[aria-selected="true"]{color:var(--ink);background:var(--sunk)}
.con-actions{margin-left:auto;display:flex;gap:8px}
.con-body{flex:1 1 0;overflow:auto;padding:14px 16px 20px}
.muted{color:var(--ink-3)}
.note{font-size:13px;color:var(--ink-2);margin:0 0 10px}
.note.warn{color:var(--wait)}
.note.bad{color:var(--fail)}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.chip{border:1px solid var(--rule);background:var(--sheet);border-radius:6px;padding:4px 10px;font-size:13px;cursor:pointer;display:inline-flex;align-items:center;gap:6px}
.chip[aria-pressed="true"]{border-color:var(--ink-2);background:var(--sunk);font-weight:500}
.chip .dot{width:7px;height:7px;border-radius:2px;background:var(--rule)}
.chip .dot.pass{background:var(--pass)} .chip .dot.fail{background:var(--fail)}
.io{margin:0 0 10px}
.io>span{display:block;font-size:12.5px;color:var(--ink-2);margin-bottom:4px;font-weight:500}
.io pre{margin:0;padding:8px 10px;background:var(--paper);border:1px solid var(--rule-2);border-radius:6px;font:13px/1.5 var(--f-code);white-space:pre-wrap;word-break:break-word;max-height:220px;overflow:auto}
.io.bad pre{border-color:var(--fail);background:var(--fail-soft)}
.io.good pre{border-color:var(--pass)}

/* ---------- the test strip ---------- */
.verdict{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px;margin:0 0 12px}
.verdict h3{margin:0;font:500 27px/1.1 var(--f-read);letter-spacing:-.01em}
.verdict h3.pass{color:var(--pass)} .verdict h3.fail{color:var(--fail)} .verdict h3.wait{color:var(--wait)} .verdict h3.info{color:var(--ink)}
.verdict .sum{font-size:14px;color:var(--ink-2)}
.strip{display:flex;flex-wrap:wrap;gap:5px;margin:0 0 8px}
.cell{width:24px;height:24px;border-radius:4px;border:1.5px solid var(--rule);background:var(--sheet);display:grid;place-items:center;font:600 12px/1 var(--f-ui);color:transparent;padding:0;cursor:default;position:relative}
.cell[data-pick]{cursor:pointer}
.cell.hid{background-image:repeating-linear-gradient(135deg,transparent 0 3px,var(--rule-2) 3px 5px)}
.cell.pass{background-color:var(--pass);border-color:var(--pass);color:var(--sheet)}
.cell.fail{background-color:var(--fail);border-color:var(--fail);color:var(--sheet)}
.cell.info{background-color:var(--ink-3);border-color:var(--ink-3);color:var(--sheet)}
.cell.skip{background-color:var(--rule-2);border-color:var(--rule-2);color:var(--ink-3)}
.cell.hid.pass,.cell.hid.fail,.cell.hid.info{background-image:repeating-linear-gradient(135deg,transparent 0 3px,rgba(255,255,255,.22) 3px 5px)}
.cell.sel{outline:2px solid var(--ink);outline-offset:2px}
.cell.run{animation:pulse 1s ease-in-out infinite;animation-delay:calc(var(--i) * 60ms)}
.strip.animate .cell{animation:cellIn .32s cubic-bezier(.2,.8,.3,1.2) both;animation-delay:calc(var(--i) * 45ms)}
@keyframes cellIn{from{transform:scale(.4);opacity:0}to{transform:none;opacity:1}}
@keyframes pulse{50%{background-color:var(--rule-2)}}
.legend{font-size:12.5px;color:var(--ink-3);margin:0 0 16px}
@media (prefers-reduced-motion: reduce){.strip.animate .cell,.cell.run{animation:none}}

.subs{list-style:none;margin:0;padding:0}
.subs li+li{border-top:1px solid var(--rule-2)}
.sub-row{display:grid;grid-template-columns:1fr auto auto;gap:14px;align-items:center;width:100%;border:0;background:none;padding:9px 6px;text-align:left;cursor:pointer;border-radius:6px;font-size:14px}
.sub-row:hover{background:var(--hover)}
.sub-row[aria-current="true"]{background:var(--sunk)}
.sub-row .v{font-weight:600}
.sub-row .v.pass{color:var(--pass)} .sub-row .v.fail{color:var(--fail)} .sub-row .v.wait{color:var(--wait)}
.sub-row .c,.sub-row .t{font-size:13px;color:var(--ink-2)}

.empty{margin:auto;max-width:440px;text-align:center;padding:40px 24px}
.empty h2{font:500 26px/1.2 var(--f-read);margin:0 0 10px}
.empty p{color:var(--ink-2);margin:0 0 18px}
.empty .row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}

/* ---------- question bank ---------- */
.two{flex:1;min-height:0;display:flex;gap:10px;padding:10px}
.side{flex:0 0 320px;display:flex;flex-direction:column;min-height:0;background:var(--sheet);border:1px solid var(--rule);border-radius:10px;overflow:hidden}
.side-head{padding:16px 16px 12px;border-bottom:1px solid var(--rule-2)}
.side-head h2{font:500 22px/1.2 var(--f-read);margin:0 0 12px}
.side-head .row{display:flex;gap:6px;flex-wrap:wrap}
.side-list{flex:1;overflow:auto;list-style:none;margin:0;padding:6px}
.side-foot{padding:12px 16px;border-top:1px solid var(--rule-2);font-size:12.5px;color:var(--ink-2);background:var(--paper)}
.side-foot b{color:var(--ink);font-weight:600}
.item{display:flex;gap:10px;align-items:flex-start;padding:10px;border-radius:8px;cursor:pointer}
.item:hover{background:var(--hover)}
.item[aria-current="true"]{background:var(--accent-soft)}
.item .body{flex:1;min-width:0}
.item .t{font-weight:500;font-size:14.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item .m{font-size:12.5px;color:var(--ink-2);display:flex;gap:8px;flex-wrap:wrap;margin-top:2px}
.item .switch{margin-top:2px}
.item img{width:30px;height:30px;border-radius:50%;flex:0 0 auto;background:var(--sunk)}
.marks{display:flex;gap:3px;margin-top:6px}
.marks i{width:10px;height:10px;border-radius:2px;border:1.5px solid var(--ink-3);opacity:.85}
.marks i.pass{background:var(--pass);border-color:var(--pass)} .marks i.miss,.marks i.fail{background:var(--fail);border-color:var(--fail)} .marks i.wait{background:var(--wait);border-color:var(--wait)} .marks i.draft{background:var(--rule)}
.main-pane{flex:1;min-width:0;min-height:0;display:flex;flex-direction:column;background:var(--sheet);border:1px solid var(--rule);border-radius:10px;overflow:hidden}
.mp-head{display:flex;align-items:center;gap:12px;padding:12px 18px;border-bottom:1px solid var(--rule-2);flex-wrap:wrap}
.mp-head .grow{flex:1;min-width:0}
.mp-head .status{font-size:13px;color:var(--ink-3)}
.mp-head .status.dirty{color:var(--wait)}
.mp-body{flex:1;overflow:auto;padding:22px 26px 60px}
.form{max-width:980px;display:flex;flex-direction:column;gap:30px}
.sec h3{font:600 18px/1.3 var(--f-read);margin:0 0 4px}
.sec>p{margin:0 0 14px;font-size:13.5px;color:var(--ink-2)}
.grid{display:grid;gap:14px}
.g3{grid-template-columns:2fr 1fr 1.4fr}
.g4{grid-template-columns:1fr 1.4fr 1.4fr 1.4fr 0.8fr}
.title-input{font:500 26px/1.2 var(--f-read);border:1px solid transparent;background:transparent;padding:4px 8px;margin-left:-8px;border-radius:6px;width:100%}
.title-input:hover{border-color:var(--rule)}
.title-input:focus{outline:2px solid var(--accent);background:var(--sheet)}
.cm-box{border:1px solid var(--rule);border-radius:8px;overflow:hidden}
.cm-box .CodeMirror{height:auto;min-height:130px}
.cm-box .CodeMirror-scroll{min-height:130px;max-height:460px}
.cm-box textarea.code-fallback{min-height:160px}
.prev{border:1px solid var(--rule);border-radius:8px;padding:12px 16px;max-height:420px;overflow:auto;background:var(--paper)}
.tests{display:flex;flex-direction:column;gap:10px}
.trow{display:grid;grid-template-columns:34px 1fr 1fr auto;gap:10px;align-items:start;padding:12px;border:1px solid var(--rule-2);border-radius:8px;background:var(--paper)}
.trow .num{font:500 17px/1 var(--f-read);color:var(--ink-3);padding-top:24px;text-align:center}
.trow .num .cell{margin:6px auto 0;width:16px;height:16px;border-radius:3px}
.trow .opts{display:flex;flex-direction:column;gap:8px;padding-top:22px;align-items:flex-start}
.trow .textarea{min-height:60px;font-family:var(--f-code);font-size:13px}
.trow .res{grid-column:2 / 4;font-size:13px;margin-top:-2px}
.trow .res.bad{color:var(--fail)} .trow .res.good{color:var(--pass)}
.row-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.inline-err{color:var(--fail);font-size:13px}

/* ---------- candidates ---------- */
.cd-grid{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(260px,1fr);gap:18px;align-items:start}
.col{display:flex;flex-direction:column;gap:18px;min-width:0}
.panel{border:1px solid var(--rule);border-radius:8px;background:var(--sheet);overflow:hidden}
.panel-head{display:flex;align-items:center;gap:10px;padding:8px 10px 8px 14px;border-bottom:1px solid var(--rule-2);flex-wrap:wrap;min-height:46px}
.panel-head h4{margin:0;font-size:14px;font-weight:600}
.panel-head .grow{flex:1}
.panel-body{padding:12px 14px}
.code-view .CodeMirror{height:440px}
.code-view textarea.code-fallback{height:440px}
.ptabs{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 16px}
.grader{font-size:13px;display:flex;align-items:flex-start;gap:8px;color:var(--ink-2)}
.grader i{flex:0 0 8px;width:8px;height:8px;border-radius:50%;background:var(--pass);margin-top:6px}
.grader.off i{background:var(--wait)}
.notes{width:100%;min-height:220px}
.tbl{width:100%;border-collapse:collapse;font-size:13px}
.tbl th{text-align:left;font-weight:500;color:var(--ink-2);padding:6px 8px;border-bottom:1px solid var(--rule-2)}
.tbl td{padding:6px 8px;border-bottom:1px solid var(--rule-2);vertical-align:top;font-family:var(--f-code);font-size:12.5px;word-break:break-word}
.tbl td.ok{color:var(--pass)} .tbl td.no{color:var(--fail)}
.tbl-wrap{overflow-x:auto}

/* ---------- modal & toast ---------- */
.modal-bg{position:fixed;inset:0;background:var(--overlay);display:grid;place-items:center;padding:20px;z-index:50}
.modal{background:var(--sheet);border-radius:12px;max-width:640px;width:100%;max-height:calc(100% - 40px);overflow:auto;padding:22px 24px;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.modal h2{font:500 24px/1.2 var(--f-read);margin:0 0 10px}
.modal p{margin:0 0 12px;color:var(--ink-2);font-size:14px}
.modal pre{background:var(--paper);border:1px solid var(--rule-2);border-radius:8px;padding:10px 12px;font:12px/1.5 var(--f-code);overflow:auto;max-height:240px}
.modal .row{display:flex;gap:8px;justify-content:flex-end;margin-top:16px;flex-wrap:wrap}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:10px 16px;border-radius:8px;font-size:14px;z-index:60;max-width:min(560px,calc(100% - 32px));box-shadow:0 8px 30px rgba(0,0,0,.2)}
.toast.bad{background:var(--fail);color:#fff}
.loading{margin:auto;color:var(--ink-3);font-size:14px}

/* ---------- CodeMirror theme ---------- */
.CodeMirror{font-family:var(--f-code);font-size:13.5px;line-height:1.6;background:var(--sheet);color:var(--ink)}
.cm-s-tb .CodeMirror-gutters{background:var(--sheet);border-right:1px solid var(--rule-2)}
.cm-s-tb .CodeMirror-linenumber{color:var(--ink-3);padding:0 10px 0 6px}
.cm-s-tb .CodeMirror-cursor{border-left:2px solid var(--accent)}
.cm-s-tb .CodeMirror-selected{background:var(--sel)}
.cm-s-tb.CodeMirror-focused .CodeMirror-selected{background:var(--sel)}
.cm-s-tb .CodeMirror-line::selection,.cm-s-tb .CodeMirror-line>span::selection,.cm-s-tb .CodeMirror-line>span>span::selection{background:var(--sel)}
.cm-s-tb .CodeMirror-activeline-background{background:var(--paper)}
.cm-s-tb .cm-keyword{color:var(--c-kw);font-weight:600}
.cm-s-tb .cm-string,.cm-s-tb .cm-string-2{color:var(--c-str)}
.cm-s-tb .cm-number,.cm-s-tb .cm-atom{color:var(--c-num)}
.cm-s-tb .cm-comment{color:var(--c-com);font-style:italic}
.cm-s-tb .cm-def{color:var(--c-def);font-weight:600}
.cm-s-tb .cm-property{color:var(--c-prop)}
.cm-s-tb .cm-builtin{color:var(--c-prop)}
.cm-s-tb .cm-meta{color:var(--c-num)}
.cm-s-tb .cm-variable-2.cm-self,.cm-s-tb .cm-variable-2{color:var(--ink-2)}
.cm-s-tb .cm-variable-2,.cm-s-tb .cm-variable-3,.cm-s-tb .cm-type{color:var(--ink)}
.cm-s-tb .cm-operator{color:var(--ink-2)}
.cm-s-tb div.CodeMirror-cursors{z-index:3}
.cm-s-tb .CodeMirror-matchingbracket{color:var(--ink)!important;background:var(--accent-soft);outline:1px solid var(--accent)}
.CodeMirror-readonly .CodeMirror-cursor{display:none!important}
textarea.code-fallback{border:0;resize:none;padding:10px 14px;font:13.5px/1.6 var(--f-code);background:var(--sheet);color:var(--ink);tab-size:2;white-space:pre;outline:none;width:100%}

/* ---------- responsive ---------- */
@media (max-width: 1100px){ .g4{grid-template-columns:1fr 1fr 1fr} .cd-grid{grid-template-columns:1fr} }
@media (max-width: 860px){
  body{height:auto;min-height:100%}
  main{flex:1 0 auto}
  .top{gap:14px;padding:0 12px;flex-wrap:wrap;height:auto;min-height:54px}
  .brand{padding:12px 0}
  .nav{order:3;width:100%;height:44px;border-top:1px solid var(--rule-2)}
  .who .rl{display:none}
  .nav.single{display:none}
  .con-head{flex-wrap:wrap;height:auto;padding:6px 8px;row-gap:6px}
  .con-actions{margin-left:0;width:100%}
  .con-actions .btn{flex:1}
  .ws{padding:0 6px 6px}
  .ws-split{flex-direction:column;overflow:visible;background:var(--sheet)}
  .statement{flex:none;border-bottom:1px solid var(--rule)}
  .gutter{display:none}
  .work{flex:none}
  .ed-host{flex:none;height:56vh}
  .console{flex:none;min-height:300px}
  .con-body{max-height:none}
  .st-inner{padding:18px 18px 24px}
  .two{flex-direction:column;padding:6px}
  .side{flex:none;max-height:none}
  .side-list{max-height:260px}
  .mp-body{padding:16px 14px 40px}
  .g3,.g4{grid-template-columns:1fr 1fr}
  .trow{grid-template-columns:1fr;gap:8px}
  .trow .num{padding-top:0;text-align:left;display:flex;gap:8px;align-items:center}
  .trow .num .cell{margin:0}
  .trow .opts{flex-direction:row;padding-top:0;align-items:center}
  .trow .res{grid-column:1}
}

/* ---------- sign-in ---------- */
.landing{flex:1;display:grid;place-items:center;padding:32px 16px}
.landing-card{width:100%;max-width:460px;background:var(--sheet);border:1px solid var(--rule);border-radius:12px;padding:28px 28px 30px}
.landing-card h1{font:500 30px/1.15 var(--f-read);letter-spacing:-.01em;margin:0 0 18px}
.landing-card h2{font:600 17px/1.3 var(--f-read);margin:0 0 6px}
.landing-card section{padding:16px 0 0;margin-top:16px;border-top:1px solid var(--rule-2)}
.landing-card section p{margin:0;color:var(--ink-2);font-size:14px}
.landing-form{display:flex;flex-direction:column;gap:10px;margin-top:8px}
.btn.quiet.danger{color:var(--fail)}
.landing-card .steps{margin:4px 0 0;padding-left:1.2em;color:var(--ink-2);font-size:14px;display:flex;flex-direction:column;gap:6px}
.landing-card > .note{margin:0}
.lang-select{width:auto;height:30px;padding:2px 30px 2px 10px;font-size:13px;font-weight:600}
.ed-head .lang-select{height:28px;border-color:var(--rule-2)}
.g-types{grid-template-columns:1fr 1fr 1.6fr;align-items:end}
.sig-preview{font-size:13px;padding-bottom:8px;min-width:0;overflow-x:auto}
.sig-preview code{white-space:nowrap}
.cm-s-tb .cm-meta{color:var(--c-num)}
.cm-s-tb .cm-variable-3,.cm-s-tb .cm-type{color:var(--c-kw)}
@media (max-width: 860px){ .g-types{grid-template-columns:1fr} }
.side-hint{font-size:12.5px;color:var(--ink-2);margin:0 0 10px}
.edit-danger{margin-top:16px;padding:12px 14px;border:1px solid var(--rule-2);border-radius:8px;background:var(--paper)}
.edit-danger p{margin:0 0 10px;font-size:13px}
.timer{font-variant-numeric:tabular-nums;font-weight:600;font-size:13px;padding:3px 9px;border-radius:5px;background:var(--sunk);color:var(--ink)}
.timer.warn{background:var(--wait-soft);color:var(--wait)}
.timer.urgent{background:var(--fail-soft);color:var(--fail)}
.time-tag{font-weight:500}
.time-tag.away-now{color:var(--ink-2)}
.away-total.some{color:var(--fail);font-weight:500}
.board-mark{display:inline-flex;align-items:center;justify-content:center;width:16px;height:16px;margin-left:6px;border-radius:50%;background:var(--fail);color:#fff;font:700 11px/1 var(--f-ui, sans-serif);vertical-align:middle}
.landing-card.complete .total{font:500 18px/1.4 var(--f-read);margin:6px 0}
.ws .presence-note{margin:8px 2px 0}
.away-list{list-style:none;margin:0;padding:0;font-size:13px}
.away-list li{padding:4px 0;border-bottom:1px solid var(--line,#e5e5e5)}
.away-list li:last-child{border-bottom:0}
.away-list li.open{color:var(--fail);font-weight:500}
.away-list li.divider{color:var(--ink-3);font-style:italic}
.time-tag.over{color:var(--fail)}
.time-tag.low{color:var(--wait)}

.page.narrow{max-width:900px;margin:0 auto;padding:16px}
.page-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.dept{margin:14px 0}
.dept-name{font:600 13px/1.2 var(--f-read);color:var(--ink-3);text-transform:uppercase;letter-spacing:.04em;margin:0 0 6px}
.side-list li.group{font:600 12px/1.2 var(--f-read);color:var(--ink-3);text-transform:uppercase;letter-spacing:.04em;padding:10px 10px 4px;cursor:default}
.side-list li.jd{font-size:13px;font-weight:500;padding:4px 10px;cursor:default}
.side-list li.item.static{cursor:default}
.side-list li.item.off{opacity:.6}
.jd-tags{display:flex;align-items:center;gap:8px;font-size:12px}
.picker .picked{margin:0 0 8px;padding-left:20px;font-size:13px}
.picker .picked li{display:flex;align-items:center;gap:4px;padding:2px 0}
.checks{display:flex;flex-direction:column;gap:4px;font-size:13px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.input.sm{padding:4px 8px;font-size:13px}
.input.inline{display:inline-block;width:auto;margin:0 4px}
.input.static{display:inline-block;padding:6px 10px;font-size:13px;color:var(--ink-2)}

.marks-list{list-style:none;margin:0;padding:0;font-size:13px}
.marks-list li{display:flex;align-items:center;gap:8px;padding:4px 0;border-bottom:1px solid var(--line,#e5e5e5)}
.marks-list li:last-child{border-bottom:0}
.marks-list li.pass .time-tag{color:var(--pass)}
.marks-list li.fail .time-tag,.marks-list li.pending .time-tag,.marks-list li.none .time-tag{color:var(--fail)}
.picked.plain{list-style:none;padding-left:0}
.set-form{margin-top:8px;padding-top:8px;border-top:1px solid var(--line,#e5e5e5)}

/* ---------- job descriptions: readiness, requests, set builder; tag chips ---------- */
.time-tag.ready{color:var(--pass)}
.time-tag.wait{color:var(--wait)}
.btn.wait{color:var(--wait);border-color:var(--wait)}
.request-note{font-size:12px;color:var(--ink-2)}
.request-note.mine{color:var(--wait);font-weight:500}
.side-list li.item.asked{box-shadow:inset 3px 0 0 var(--wait)}
.set-items li.draw .grow b{color:var(--accent)}
.picked.plain li.short{opacity:.85}
.note.preview:empty{display:none}
.chips{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.chip{display:inline-flex;align-items:center;gap:4px;font-size:12px;background:var(--sunk);border-radius:4px;padding:2px 4px 2px 7px}
.chip.theirs{border:1px dashed var(--rule);background:transparent;padding-right:7px}
.chip .x{border:0;background:none;cursor:pointer;color:var(--ink-2);font-size:14px;line-height:1;padding:0 2px}
.chip .x:hover{color:var(--fail)}
.chip-add .input{width:140px}
.check.jd-row{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.check.hm{font-size:12px;color:var(--ink-2)}

/* ---------- board (CONTEXT.md: Board, Stage) ---------- */
.page.wide{max-width:1400px;width:100%;margin:0 auto;padding:18px 20px}
.page-head .input.sm{max-width:220px}
.check.inline{display:inline-flex;align-items:center;gap:4px;font-size:13px;white-space:nowrap}
.board-jd{margin:8px 0 18px}
.board-jd-head{display:flex;gap:12px;align-items:baseline;margin:0 0 6px;font-size:14px}
.board-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.board-cols.four{grid-template-columns:repeat(4,minmax(0,1fr))}
.board-col{background:var(--sunk);border-radius:10px;padding:8px;min-height:60px}
.board-col-head{display:flex;justify-content:space-between;align-items:center;font:600 12px/1.2 var(--f-read);text-transform:uppercase;letter-spacing:.04em;color:var(--ink-3);padding:2px 4px 8px}
.board-col-head .count{background:var(--sheet);color:var(--ink-2);border-radius:9px;min-width:18px;padding:0 6px;font-size:12px;text-align:center}
.board-col.done .board-col-head{color:var(--pass)} .board-col.ongoing .board-col-head{color:var(--wait)} .board-col.archived .board-col-head{color:var(--ink-3)}
.card{display:block;width:100%;text-align:left;border:1px solid var(--rule);background:var(--sheet);border-radius:8px;padding:8px 10px;margin:0 0 8px;cursor:pointer;color:inherit;font:inherit}
.card:hover{border-color:var(--accent)}
.card .t{display:flex;justify-content:space-between;gap:8px;font-weight:500;font-size:14px}
.card .m{display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:12px;color:var(--ink-2);margin-top:3px}
.card.archived{opacity:.75}
.empty-col{margin:0;padding:6px;text-align:center}
.stage{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;border-radius:4px;padding:1px 6px;background:var(--sheet);color:var(--ink-2)}
.stage.ongoing{color:var(--wait)} .stage.done{color:var(--pass)} .stage.archived{color:var(--ink-3)}
@media (max-width:900px){.board-cols,.board-cols.four{grid-template-columns:1fr}}
.grading{font-size:11px;font-weight:600;color:var(--wait);text-transform:uppercase;letter-spacing:.04em}
.provisional{font-style:italic}
.marks-row{display:flex;align-items:center;gap:8px}
.decision{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;border-radius:4px;padding:1px 6px;background:var(--sunk);color:var(--ink-2)}
.decision.advance{color:var(--pass);background:var(--pass-soft)} .decision.reject{color:var(--fail);background:var(--fail-soft)} .decision.hold{color:var(--wait);background:var(--wait-soft)}
.decision.awaiting{font-weight:500;text-transform:none;letter-spacing:0;border:1px dashed var(--rule);background:transparent}
.notes-list{display:flex;flex-direction:column;gap:8px;margin-bottom:8px}
.note-card{border:1px solid var(--rule);border-radius:8px;padding:8px 10px;font-size:13px}
.note-card.left{opacity:.8}
.note-by{font-size:12px;margin-bottom:4px}
.note-text{white-space:pre-wrap}
.note-mine b{display:block;font-size:12px;margin-bottom:4px}
.confirm-once{border:1px solid var(--wait);border-radius:8px;padding:10px 12px;margin-top:4px;font-size:13px}
.confirm-once p{margin:0 0 8px}
.note-actions{margin-top:6px;align-items:center}
.note-state{font-size:12px}
.note-state.unsaved{color:var(--wait)}
.note-state.changed{color:var(--wait)}
.score{font-weight:600;font-size:12px}
.score.provisional{opacity:.7}
/* integrity signals (CONTEXT.md: Integrity signal) */
.signals-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;font-size:13px}
.signals-list li{display:flex;gap:8px;align-items:baseline}
.signals-list .when{color:var(--ink-2);font-variant-numeric:tabular-nums;min-width:72px}
.signals-list .flag{color:var(--fail);font-weight:600}
.signals-group{margin:0 0 10px}
.signals-group h5{margin:0 0 4px;font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-2)}
.sim{font-size:12px;border-radius:4px;padding:1px 6px;background:var(--sunk);color:var(--ink-2)}
.sim.high{background:var(--fail-soft);color:var(--fail);font-weight:600}
.signals-count{font-size:11px;font-weight:600;border-radius:4px;padding:1px 6px;background:var(--wait-soft);color:var(--wait)}
.playback{display:flex;align-items:center;gap:8px;font-size:12.5px;margin-top:6px}
.playback input[type=range]{flex:1;min-width:120px}
.playback .ticks{position:relative;height:6px;flex:1}
.profile{font-size:12.5px;color:var(--ink-2);margin:6px 0 0;padding-left:16px}
.profile li.hot{color:var(--fail);font-weight:600}
.disclosure{font-size:12.5px;color:var(--ink-2);background:var(--sunk);border-radius:8px;padding:8px 12px;margin:8px 0}
.blocked-notice{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--ink);color:var(--paper);font-size:13px;padding:8px 14px;border-radius:8px;z-index:50}
.watermarked{position:relative}
.watermarked .wm{position:absolute;inset:0;pointer-events:none;overflow:hidden;z-index:0;color:var(--ink);opacity:.08;font-size:18px;font-weight:600;line-height:3.2;white-space:pre-wrap;word-break:break-all;transform:rotate(-18deg) scale(1.3);user-select:none}
.watermarked > :not(.wm){position:relative;z-index:1}
.activity-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;font-size:13px}
.activity-list li{display:flex;gap:10px;align-items:baseline}
.activity-list li.divider{color:var(--ink-2);font-style:italic;padding-left:0}
.activity-list .when{color:var(--ink-2);font-variant-numeric:tabular-nums;white-space:nowrap;min-width:72px}
.activity-list .what.flag{color:var(--fail);font-weight:600}
.activity-head .signals-count{margin-left:8px}
.attempt-history{display:inline-flex;align-items:center;margin-left:8px;padding:1px 7px;border:1px solid var(--rule);border-radius:10px;font:500 11px/1.6 var(--f-ui);color:var(--ink-2);cursor:pointer;vertical-align:middle;white-space:nowrap}
.attempt-history:hover,.attempt-history:focus{border-color:var(--ink-2);outline:none}
.attempt-history.flagged{border-color:var(--fail);color:var(--fail)}
.history-pop{position:absolute;z-index:50;min-width:240px;background:var(--sheet);border:1px solid var(--rule);border-radius:8px;box-shadow:0 6px 24px rgba(0,0,0,.12);padding:4px;display:flex;flex-direction:column}
.history-item{display:flex;align-items:center;gap:6px;text-align:left;background:none;border:0;border-radius:6px;padding:6px 8px;font:13px/1.4 var(--f-ui);color:var(--ink);cursor:pointer}
.history-item:hover,.history-item:focus{background:var(--sunk);outline:none}
.history-item.current{font-weight:600;cursor:default}