:root{
  --bg:#EEF2F7;--surface:#fff;--surface-2:#F6F8FB;--ink:#1A2330;--muted:#5A6676;--line:#D6DDE6;
  --brand:#1D3557;--brand-2:#2A4C78;--gold:#F2B705;--ok:#2C9244;--bad:#C63A22;--warn:#B86E00;--blue:#2462A6;
  --radius:8px;
}
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font-family:Hind,"Segoe UI",system-ui,sans-serif;font-size:15px;line-height:1.5}
a{color:var(--blue)}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
h1,h2,h3{line-height:1.25}
.muted{color:var(--muted)}.small{font-size:13px}.mono{font-family:ui-monospace,Consolas,monospace;font-size:.95em}
.right{text-align:right}.nowrap{white-space:nowrap}

/* shell */
.shell{display:grid;grid-template-columns:236px 1fr;min-height:100vh}
.side{background:var(--brand);color:#fff;padding:16px 0 30px;position:sticky;top:0;height:100vh;overflow:auto}
.side-brand{display:flex;gap:10px;align-items:center;padding:0 18px 16px;font-weight:600;line-height:1.2}
.side-brand small{display:block;font-weight:400;opacity:.75;font-size:12px}
.side-brand.dark{padding:0 0 16px;color:var(--ink)}
.mark{width:38px;height:38px;border-radius:8px;background:var(--gold);color:var(--brand);display:grid;place-items:center;font-weight:700;flex:none}
.side nav a,.side nav .soon{display:block;padding:7px 18px 7px 22px;color:#DCE5F1;text-decoration:none;border-left:3px solid transparent}
.side nav a:hover{background:rgba(255,255,255,.07);color:#fff}
.side nav a.on{background:rgba(255,255,255,.12);color:#fff;border-left-color:var(--gold);font-weight:600}
.side nav .soon{opacity:.45;cursor:default}
.nav-group{font-size:12px;opacity:.6;padding:16px 18px 4px}
.main{min-width:0;display:flex;flex-direction:column}
.top{display:flex;align-items:center;gap:14px;padding:14px 26px;background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.top h1{margin:0;font-size:20px;flex:1}
.top-user{display:flex;gap:14px;align-items:center;font-size:14px}
.menu-btn{display:none}
.content{padding:22px 26px 60px;display:grid;gap:18px;align-content:start}

/* panels */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}
.panel h2{margin:0 0 12px;font-size:17px}
.panel h3{margin:18px 0 10px;font-size:15px}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.panel-head h2{margin:0}
.panel.narrow{max-width:860px}
.count{font-weight:500;color:var(--muted);font-size:14px;margin-left:4px}
.cols{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:18px;align-items:start}
.cols-form{grid-template-columns:minmax(280px,380px) minmax(0,1fr)}
.empty{color:var(--muted);padding:12px 0;margin:0}
.setup{border-left:4px solid var(--gold)}
.steps{margin:0;padding-left:20px}.steps li{margin:6px 0}
.tips{margin:0;padding-left:18px}.tips li{margin:7px 0;max-width:70ch}
.list{list-style:none;margin:0;padding:0}.list li{padding:8px 0;border-bottom:1px solid var(--line);display:grid}
.list li:last-child{border-bottom:0}

/* stats */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;text-decoration:none;color:var(--ink);border-top:4px solid var(--brand-2)}
.stat b{display:block;font-size:30px;line-height:1.1}
.stat span{color:var(--muted)}
.stat:hover{border-color:var(--brand-2)}

/* forms */
.form{display:grid;gap:12px}
.form label,.filters label{display:grid;gap:4px;font-size:14px;color:var(--muted);font-weight:500}
.form label small{font-weight:400}
input[type=text],input[type=search],input[type=number],input[type=email],input[type=password],input[type=date],input[type=datetime-local],input:not([type]),select,textarea{
  font:inherit;font-size:15px;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:8px 10px;width:100%;min-width:0}
textarea{resize:vertical;line-height:1.5}
input:focus,select:focus,textarea:focus{border-color:var(--blue);outline:2px solid rgba(36,98,166,.18)}
.check,.radio{display:flex!important;gap:8px;align-items:center;color:var(--ink)!important;font-weight:400!important;cursor:pointer}
.check input,.radio input{width:17px;height:17px;accent-color:var(--blue)}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 16px}
.grid4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px 16px}
.bulk{margin-top:18px;padding-top:6px;border-top:1px dashed var(--line)}
.btn{display:inline-flex;align-items:center;gap:6px;font:inherit;font-weight:600;font-size:14px;padding:8px 14px;border-radius:6px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;text-decoration:none;line-height:1.2;justify-self:start}
.btn:hover{border-color:var(--brand-2)}
.btn.primary{background:var(--brand-2);border-color:var(--brand-2);color:#fff}
.btn.primary:hover{background:var(--brand)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.link{background:none;border:0;padding:0;font:inherit;color:var(--blue);cursor:pointer;text-decoration:underline;text-underline-offset:2px}
.link.danger,.danger{color:var(--bad)}
.link:disabled{opacity:.4;cursor:not-allowed}
form.inline{display:inline;margin-left:10px}
td form.inline:first-child{margin-left:0}
.actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.actions.sticky{position:sticky;bottom:0;background:var(--surface);padding:12px 0;border-top:1px solid var(--line);z-index:3}
.panel.actions.sticky{padding:12px 20px}
.filters{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}
.filters input[type=search]{flex:1 1 240px;width:auto}
.filters select{width:auto;max-width:220px}
.inline-filter select{width:auto}
.hint{color:var(--muted);font-size:14px;margin:0}
code{background:var(--surface-2);border:1px solid var(--line);border-radius:4px;padding:0 4px;font-size:13px}

/* tables */
.tblwrap{overflow-x:auto}
.tblwrap.tall{max-height:60vh;overflow:auto}
.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th,.tbl td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.tbl th{background:var(--surface-2);font-weight:600;color:var(--muted);position:sticky;top:0}
.tbl tr.dim td{opacity:.55}
.tbl tr.row-bad td{background:#FDF0EE}
.tbl tr.row-bad td:last-child{color:var(--bad)}

/* tags */
.tag{display:inline-block;font-size:12px;font-weight:600;padding:2px 9px;border-radius:12px;background:#E6ECF4;color:var(--brand-2);white-space:nowrap}
.tag.light{background:var(--surface-2);color:var(--muted);border:1px solid var(--line)}
.tag.ok{background:#E3F3E7;color:#1E6B31}.tag.bad{background:#FBE5E1;color:#9A2A16}.tag.warn{background:#FFF1D6;color:#8A5200}
.tag.diff-easy{background:#E3F3E7;color:#1E6B31}.tag.diff-medium{background:#FFF1D6;color:#8A5200}.tag.diff-hard{background:#FBE5E1;color:#9A2A16}
.summary{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}

/* flash */
.flash{padding:10px 14px;border-radius:6px;border:1px solid;font-size:14px}
.flash.success{background:#EAF6ED;border-color:#B9E0C2;color:#1E5B2C}
.flash.error{background:#FCEDEA;border-color:#F0C2B8;color:#8C2513}
.note-bar{background:#FFF8E5;border:1px solid #F1DDA5;padding:10px 14px;border-radius:6px;margin:0 0 12px}

/* pager */
.pager{display:flex;gap:6px;margin-top:16px;flex-wrap:wrap}
.pager a,.pager span{padding:5px 11px;border:1px solid var(--line);border-radius:6px;text-decoration:none;font-size:14px}
.pager .cur{background:var(--brand-2);color:#fff;border-color:var(--brand-2)}

/* questions */
.qlist{display:grid;gap:12px}
.qitem{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:12px 16px;border-left:4px solid var(--line)}
.panel .qitem{background:var(--surface-2)}
.qitem.state-bad{border-left-color:var(--bad)}.qitem.state-warn{border-left-color:var(--warn)}.qitem.state-ok{border-left-color:var(--ok)}
.qitem-head{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:8px}
.qitem-head .spacer{flex:1}
.qitem-head form.inline{margin-left:4px}
.qcard{font-family:"Noto Serif",Georgia,serif;font-size:15.5px;line-height:1.7;overflow-x:auto}
.qcard-text{max-width:80ch}
.qcard-opts{list-style:none;margin:8px 0 0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 18px}
.qcard-opts li{display:flex;gap:8px;padding:4px 8px;border-radius:6px}
.qcard-opts li.correct{background:#E3F3E7;outline:1px solid #B9E0C2}
.qcard-opts .k{font-family:Hind,sans-serif;font-weight:600;color:var(--muted)}
.qcard-ans{font-family:Hind,sans-serif;font-size:14px;margin-top:8px}
.qcard-sol{font-size:14.5px;margin-top:6px}
.qcard-sol summary{font-family:Hind,sans-serif;cursor:pointer;color:var(--blue);font-size:14px}
.qcard img{max-width:100%;height:auto;vertical-align:middle}
.eq-missing{background:#FBE5E1;color:#9A2A16;font-family:Hind,sans-serif;font-size:13px;padding:1px 6px;border-radius:4px}
.issues{margin:0 0 8px;padding:8px 12px 8px 28px;border-radius:6px;font-size:14px}
.issues.bad{background:#FCEDEA;color:#8C2513}.issues.warn{background:#FFF6E2;color:#7A4900}
.viewbar{display:flex;gap:8px;flex-wrap:wrap}
.chipbtn{font:inherit;font-size:14px;border:1px solid var(--line);background:var(--surface-2);border-radius:16px;padding:4px 12px;cursor:pointer}
.chipbtn[aria-pressed="true"]{background:var(--brand-2);color:#fff;border-color:var(--brand-2)}
.bulkbar{display:flex;gap:16px;align-items:center;margin-bottom:10px}

/* editor */
.qform{gap:16px}
.typepick{border:1px solid var(--line);border-radius:6px;display:flex;gap:22px;flex-wrap:wrap;padding:8px 14px 10px}
.typepick legend{font-size:14px;color:var(--muted);padding:0 4px}
.ed-field{display:grid;gap:6px;flex:1;min-width:0}
.ed-label{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px;font-weight:500;color:var(--muted)}
.ed-tools{display:flex;gap:4px}
.ed-tools button{font:inherit;font-size:13px;border:1px solid var(--line);background:var(--surface-2);border-radius:4px;padding:1px 8px;cursor:pointer;color:var(--ink)}
.ed-input{font-family:ui-monospace,Consolas,monospace;font-size:14px}
.ed-preview{font-family:"Noto Serif",Georgia,serif;font-size:15.5px;line-height:1.7;background:var(--surface-2);border:1px dashed var(--line);border-radius:6px;padding:6px 12px;min-height:36px;overflow-x:auto}
.ed-preview:empty::before{content:"Preview";color:var(--muted);font-family:Hind,sans-serif;font-size:13px}
.ed-preview img{max-width:100%}
.opt-row{display:flex;gap:12px;align-items:flex-start;margin-bottom:12px}
.correct-pick{display:grid!important;justify-items:center;gap:2px;padding-top:26px;width:62px;flex:none;cursor:pointer;font-size:12px!important}
.correct-pick input{width:20px;height:20px;accent-color:var(--ok)}
.opt-row:has(.ans-opt:checked) .ed-input{border-color:var(--ok);background:#F5FBF6}
#numBlock label{max-width:340px}

/* auth */
body.auth{display:grid;place-items:center;min-height:100vh;padding:20px}
.auth-card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:26px;width:min(380px,100%);display:grid;gap:14px}
.auth-card.wide{width:min(760px,100%)}
.auth-card label{display:grid;gap:4px;font-size:14px;color:var(--muted)}
.auth-card label small{color:var(--muted)}
.auth-card h2{margin:10px 0 0;font-size:16px}
.checks{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:4px 16px;font-size:14px}
.checks .ok{color:var(--ok)}.checks .bad{color:var(--bad);font-weight:600}

.scrim{display:none}
@media (max-width:980px){
  .cols,.cols-form{grid-template-columns:1fr}
  .grid4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:760px){
  .shell{grid-template-columns:1fr}
  .side{position:fixed;left:0;top:0;bottom:0;width:250px;z-index:40;transform:translateX(-100%);transition:transform .2s}
  .side.open{transform:none}
  .scrim.on{display:block;position:fixed;inset:0;background:rgba(10,20,35,.45);z-index:35}
  .menu-btn{display:inline-block;font:inherit;border:1px solid var(--line);background:var(--surface);border-radius:6px;padding:5px 10px}
  .top{padding:10px 14px}.top h1{font-size:17px}
  .content{padding:14px}
  .grid2,.grid4{grid-template-columns:1fr}
  .qcard-opts{grid-template-columns:1fr}
  .opt-row{flex-direction:column;gap:2px}.correct-pick{padding-top:0;display:flex!important;width:auto}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* ---------- Phase 2: exams ---------- */
.exam-tabs{display:flex;gap:4px;border-bottom:2px solid var(--line);margin-bottom:-6px;flex-wrap:wrap}
.exam-tabs a{padding:8px 16px;text-decoration:none;color:var(--muted);font-weight:600;border-bottom:3px solid transparent;margin-bottom:-2px}
.exam-tabs a.on{color:var(--brand-2);border-bottom-color:var(--brand-2)}
.sec-tabs{display:flex;gap:8px;flex-wrap:wrap}
.sec-tabs a{padding:6px 14px;border:1px solid var(--line);border-radius:6px;background:var(--surface);text-decoration:none;color:var(--ink);font-weight:600}
.sec-tabs a span{font-weight:500;color:var(--muted);margin-left:4px}
.sec-tabs a.on{background:var(--brand-2);border-color:var(--brand-2);color:#fff}.sec-tabs a.on span{color:#DCE5F1}
.status-bar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.status-bar>div{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.patterns{border:0;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px}
.patterns legend{font-size:14px;color:var(--muted);font-weight:500;margin-bottom:6px}
.pattern{display:flex!important;gap:10px;align-items:flex-start;border:1px solid var(--line);border-radius:8px;padding:10px 12px;cursor:pointer;color:var(--ink)!important}
.pattern:has(input:checked){border-color:var(--brand-2);background:#F1F5FB}
.pattern input{margin-top:4px;accent-color:var(--brand-2)}
.pattern span{display:grid;gap:2px}.pattern small{color:var(--muted);font-weight:400}
.target-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.target-grid>div{display:grid;gap:4px;align-content:start;max-height:240px;overflow:auto;border:1px solid var(--line);border-radius:6px;padding:10px 12px}
.sec-tbl td,.sec-tbl th{text-align:center;vertical-align:middle}
.sec-tbl td:nth-child(2),.sec-tbl td:nth-child(3){text-align:left}
input.tiny{width:64px;padding:5px 6px}
input.mid{min-width:120px}
select.needs{border-color:var(--bad);background:#FDF0EE}
.add-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.add-row select,.add-row input{width:auto}
.qpick{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.qcard.compact{font-size:14.5px;max-height:320px;overflow:auto}
.auto-pick{border:1px solid var(--line);border-radius:6px;padding:8px 12px;margin-bottom:14px;background:var(--surface-2)}
.auto-pick summary{cursor:pointer}
.auto-pick form{margin-top:10px}
.auto-pick select[multiple]{height:auto}
.rank-tbl td,.rank-tbl th{white-space:nowrap}
.danger-btn{color:var(--bad);border-color:#F0C2B8}
@media (max-width:980px){.qpick{grid-template-columns:1fr}.target-grid{grid-template-columns:1fr}}

/* ---------- College tablets ---------- */
.device-key{font-size:30px;font-weight:700;letter-spacing:3px;color:var(--brand-2);background:var(--surface-2);border:1px dashed var(--line);border-radius:8px;padding:10px 16px;display:inline-block;margin:4px 0 10px}
.qr-box{background:#fff;padding:10px;border:1px solid var(--line);border-radius:8px;width:min(360px,100%);margin:6px 0 12px}
.qr-box svg{display:block;width:100%;height:auto}