/* ---- theme: blue / navy ---- */
:root{
  --paper:#dde8f7;      /* cool blue background */
  --paper-2:#cadcf1;    /* deeper blue panels / hovers / inactive controls */
  --ink:#12274a;        /* deep navy — primary text + dark chrome */
  --ink-light:#465982;  /* muted navy-blue secondary text */
  --sienna:#1a54a4;     /* accent (blue): headings, links, brand, active nav */
  --border-light:#b9cbe6;
  --highlight-bg:#d7e4f5;
  --qblue:#0b4a8f;      /* answer table + primary buttons + selected chrome */
  --green:#00a544;
  --red:#e40014;
  --hy:#fde047;         /* high-yield highlight */
  --font-sans:"Source Sans Pro",-apple-system,Segoe UI,Roboto,sans-serif;
  --font-serif:Lora,Georgia,serif;
  --font-q:Arial,Verdana,Helvetica,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%}
body{background:var(--paper);color:var(--ink);font-family:var(--font-sans);font-size:15px;line-height:1.5}
.boot{padding:60px;text-align:center;color:var(--ink-light)}
a{color:var(--sienna)}
button{font-family:inherit}

/* ============================ APP SHELL ============================ */
.shell{display:flex;min-height:100vh}
.sidebar{width:210px;flex-shrink:0;background:#fff;border-right:1px solid var(--border-light);
  padding:18px 12px;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{display:flex;align-items:center;gap:9px;padding:6px 8px 20px}
.brand-logo{width:28px;height:28px;background:var(--ink);color:#fff;border-radius:7px;display:flex;
  align-items:center;justify-content:center;font-family:var(--font-serif);font-weight:700}
.brand-name{font-family:var(--font-serif);font-weight:700;font-size:19px;color:var(--ink)}
.nav-group{font-size:10px;font-weight:700;color:var(--ink-light);letter-spacing:.8px;padding:14px 10px 4px}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:7px;color:var(--ink);
  font-weight:600;font-size:14px;cursor:pointer;text-decoration:none}
.nav-item:hover{background:var(--paper-2)}
.nav-item.active{background:var(--paper-2);color:var(--sienna)}
.nav-ico{width:18px;text-align:center;opacity:.75}
.shell-main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar-app{height:60px;display:flex;align-items:center;justify-content:flex-end;gap:16px;
  padding:0 28px;border-bottom:1px solid var(--border-light)}
.tb-right{display:flex;align-items:center;gap:16px}
.menu-wrap{position:relative}
.qbank-chip{text-align:right;background:var(--paper-2);border:1px solid var(--border-light);
  border-radius:8px;padding:6px 14px;cursor:pointer}
.qbank-chip:hover{background:#d3e0f0}
.qbank-chip-lbl{font-size:9px;letter-spacing:.6px;color:var(--ink-light);font-weight:700}
.qbank-chip-name{font-weight:700;color:var(--ink);font-size:13px}
.user-chip{display:flex;align-items:center;gap:8px;background:none;border:none;cursor:pointer;padding:4px}
.user-chip:hover{opacity:.85}
.user-name{font-size:13px;font-weight:600}
.user-avatar{width:30px;height:30px;border-radius:50%;color:#fff;display:flex;align-items:center;
  justify-content:center;font-weight:700;font-size:13px;background:linear-gradient(135deg,var(--sienna),var(--ink))}
/* dropdown menus */
.dropdown{position:absolute;right:0;top:calc(100% + 6px);background:#fff;border:1px solid var(--border-light);
  border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.12);min-width:230px;padding:6px;z-index:50}
.dropdown[hidden]{display:none}
.dd-title{font-size:10px;font-weight:700;letter-spacing:.5px;color:var(--ink-light);padding:8px 10px 4px}
.dd-item{display:flex;justify-content:space-between;align-items:center;width:100%;text-align:left;
  background:none;border:none;padding:9px 10px;border-radius:6px;cursor:pointer;font-size:13px;color:var(--ink)}
.dd-item:hover{background:var(--paper-2)}
.dd-item.sel{font-weight:700}
.dd-check{color:var(--green)}
.dd-note{font-size:11px;color:var(--ink-light);padding:8px 10px 4px;border-top:1px solid var(--border-light);margin-top:4px}
.dd-userline{font-size:12px;color:var(--ink-light);padding:8px 10px}
.dd-userline b{color:var(--ink)}

/* ---- login ---- */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--paper);padding:20px}
.auth-card{width:100%;max-width:380px;background:#fff;border:1px solid var(--border-light);
  border-radius:14px;padding:30px 28px;box-shadow:0 10px 30px rgba(26,46,59,.08)}
.auth-brand{display:flex;align-items:center;gap:9px;justify-content:center;margin-bottom:18px}
.auth-card h1{font-family:var(--font-serif);font-size:22px;margin:0 0 4px;color:var(--ink)}
.auth-sub{color:var(--ink-light);font-size:13px;margin:0 0 18px}
.auth-form{display:flex;flex-direction:column;gap:12px}
.auth-form label{font-size:13px;font-weight:600;color:var(--ink);display:flex;flex-direction:column;gap:5px}
.auth-form input{border:1px solid var(--border-light);border-radius:7px;padding:10px 12px;font-size:14px}
.auth-form input:focus{outline:none;border-color:var(--qblue)}
.auth-submit{margin-top:6px}
.auth-err{background:#fdeaea;color:var(--red);border:1px solid #f5c2c2;border-radius:6px;padding:8px 10px;font-size:13px;font-weight:600}
.auth-switch{margin-top:16px;text-align:center;font-size:13px;color:var(--ink-light)}
.auth-switch a{cursor:pointer;font-weight:600}
.shell-content{flex:1;overflow-y:auto}
.page{max-width:1180px;margin:0 auto;padding:26px 28px 70px;width:100%}
.page-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:20px}
.page-head h1{font-family:var(--font-serif);font-size:28px;margin:0;color:var(--ink)}
.page-sub{color:var(--ink-light);font-size:14px;margin-top:2px}
.btn-dark{background:var(--ink);color:#fff;border:none;border-radius:7px;padding:10px 16px;font-weight:600;cursor:pointer}
.card{background:#fff;border:1px solid var(--border-light);border-radius:12px;padding:20px;margin-bottom:18px}
.card-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:14px}
.card-head h3{margin:0;font-family:var(--font-serif);font-size:17px;color:var(--ink)}
.card-head-note,.card-head .card-head-note{font-size:12px;color:var(--ink-light)}
.mini-lbl{font-size:10px;font-weight:700;letter-spacing:.6px;color:var(--ink-light)}
.empty{color:var(--ink-light);font-size:14px;padding:8px 0}
.empty.big{padding:30px;text-align:center}
.strong{color:var(--green)} .avg{color:var(--ink)} .weak{color:var(--red)} .none{color:var(--ink-light)}

/* ---- dashboard ---- */
.dash-grid{display:grid;grid-template-columns:1fr 420px;gap:18px;align-items:start}
@media(max-width:1080px){.dash-grid{grid-template-columns:1fr}}
.qbank-card{border-top:4px solid var(--sienna)}
.qbank-card-top{display:flex;justify-content:space-between;gap:20px}
.qbank-card h2{font-family:var(--font-serif);margin:0 0 4px;color:var(--ink)}
.qbank-desc{color:var(--ink-light);font-size:13px;max-width:560px;margin:0}
.qbank-time{text-align:right;flex-shrink:0}
.qbank-time-val{font-weight:700;font-size:18px;color:var(--ink)}
.reset-progress{margin-top:8px;background:none;border:1px solid var(--border-light);border-radius:6px;
  padding:5px 10px;font-size:11px;color:var(--sienna);cursor:pointer}
.progress-bar{display:flex;height:12px;border-radius:6px;overflow:hidden;background:#d4e0ee;margin:18px 0 6px}
.pb-correct{background:var(--green)} .pb-incorrect{background:var(--red)}
.progress-legend{display:flex;justify-content:space-between;font-size:12px;color:var(--ink-light)}
.pl-correct{color:var(--green);font-weight:600}.pl-incorrect{color:var(--red);font-weight:600}
.qbank-stats{display:flex;gap:40px;margin-top:20px;border-top:1px solid var(--border-light);padding-top:16px}
.stat-big{font-size:30px;font-weight:800;line-height:1.1;margin-top:2px}
.stat-sub{font-size:12px;color:var(--ink-light)}
.stat-assess{flex:1}
.assess-text{font-size:14px;color:var(--ink);margin-top:4px}
.subj-row{display:flex;align-items:center;gap:12px;padding:6px 0}
.subj-row.muted{opacity:.7}
.subj-name{width:230px;flex-shrink:0;font-size:13px}
.subj-track{flex:1;height:8px;background:#dde7f3;border-radius:4px;overflow:hidden}
.subj-fill{height:100%;border-radius:4px}
.subj-fill.strong{background:var(--green)}.subj-fill.avg{background:var(--ink)}.subj-fill.weak{background:var(--red)}.subj-fill.none{background:#ccc}
.subj-meta{width:110px;text-align:right;font-size:12px;color:var(--ink-light);flex-shrink:0}
.unattempted{margin-top:12px}
.unattempted summary{cursor:pointer;color:var(--sienna);font-size:13px;font-weight:600}

/* ---- competency radar ---- */
.radar-card{position:sticky;top:16px}
.radar-svg{width:100%;height:auto;display:block;max-width:400px;margin:0 auto}
.radar-lbl{font-size:9px;fill:var(--ink);font-weight:600}
.radar-pct{font-size:9px;font-weight:700}
.radar-pct.strong{fill:var(--green)}.radar-pct.avg{fill:var(--ink)}.radar-pct.weak{fill:var(--red)}.radar-pct.none{fill:var(--ink-light)}
.radar-legend{display:flex;justify-content:center;flex-wrap:wrap;gap:8px 20px;margin-top:12px;font-size:12px;
  color:var(--ink-light);border-top:1px solid var(--border-light);padding-top:12px}
/* dot is a flex-item ::before, so the `gap` guarantees separation from the label
   and both sit in normal flow (same layer, never overlapping) */
.radar-legend .leg{display:inline-flex;align-items:center;gap:7px;white-space:nowrap;color:var(--ink-light);font-weight:600}
.radar-legend .leg::before{content:"";display:inline-block;width:10px;height:10px;border-radius:50%;flex-shrink:0}
.radar-legend .leg.strong::before{background:var(--green)}
.radar-legend .leg.avg::before{background:var(--ink)}
.radar-legend .leg.weak::before{background:var(--red)}

/* ---- test history ---- */
.hist-filters{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-bottom:16px}
.hf{font-size:13px;color:var(--ink-light);display:flex;align-items:center;gap:8px}
.hf select,.hf input{border:1px solid var(--border-light);border-radius:6px;padding:7px 10px;font-size:13px;background:#fff}
.hf-search{flex:1;min-width:220px}.hf-search input{flex:1;width:100%}
.hf-mode{margin-left:auto;flex-shrink:0;width:240px}
.hf-mode button{padding:8px 0;font-size:13px}
.hist-table{width:100%;border-collapse:collapse}
.hist-table th{text-align:left;font-size:11px;letter-spacing:.5px;color:var(--ink-light);text-transform:uppercase;
  padding:10px 12px;border-bottom:1px solid var(--border-light);background:var(--paper-2)}
.hist-table td{padding:14px 12px;border-bottom:1px solid var(--border-light);vertical-align:top;font-size:13px}
.ta-r{text-align:right}
.qb-name{font-weight:700;color:var(--ink)}
.mode-badge{display:inline-block;margin-top:5px;font-size:10px;font-weight:700;letter-spacing:.3px;
  padding:3px 7px;border-radius:4px;text-transform:uppercase}
.mode-badge.tutor{background:#e6eef4;color:var(--qblue)}
.mode-badge.timed{background:#fff3d6;color:#a15c00}
.t-name{font-size:12px;color:var(--ink-light);margin-top:4px}
.ss-line{margin:2px 0;color:var(--ink);max-width:320px}
.ss-tag{display:inline-block;width:26px;font-size:9px;font-weight:700;color:var(--ink-light)}
.c-time .t-date{color:var(--ink-light);font-size:12px;margin-top:2px}
.c-time b{font-variant-numeric:tabular-nums}
.perf-pct{font-weight:800;font-size:15px;text-align:center;margin-bottom:5px}
.perf-bar{display:flex;height:6px;border-radius:3px;overflow:hidden;background:#e6e3dd;min-width:150px}
.pf-correct{background:var(--green)}.pf-incorrect{background:var(--red)}
.c-break div{display:flex;justify-content:space-between;gap:14px;min-width:120px;padding:1px 0}
.c-break span{color:var(--ink-light)}
.link-btn{background:none;border:none;color:var(--sienna);font-weight:600;cursor:pointer;font-size:13px}
.icon-btn{background:none;border:none;cursor:pointer;opacity:.5;font-size:13px}
.icon-btn:hover{opacity:1}
.empty.big a{cursor:pointer}

.back-link{display:inline-block;margin-bottom:10px;color:var(--sienna);cursor:pointer;font-size:14px;font-weight:600}

/* ============================ CREATE TEST ============================ */
.create-wrap{max-width:960px;margin:0 auto;padding:28px 24px 80px}
.brandbar{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px}
.brandbar h1{font-family:var(--font-serif);font-weight:600;color:var(--ink);font-size:24px;margin:0}
.brandbar .sub{color:var(--ink-light);font-size:13px}
.section{margin-top:34px}
.section-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-light);padding-bottom:8px}
.section-head h2{font-family:var(--font-serif);font-size:19px;margin:0;color:var(--ink)}
.section-head h2 .rn{color:var(--sienna);margin-right:8px;font-weight:700}
.section-head .modify{color:var(--sienna);font-size:13px;cursor:pointer;background:none;border:none}
.section-head .modify:hover{text-decoration:underline}
.selected-summary{margin-top:12px;font-size:14px}
.selected-summary .label{font-weight:600;color:var(--ink)}
.selected-summary .val{color:var(--sienna);margin-top:2px}

/* facet picker (subject/system) */
.facet-panel{margin-top:14px;border:1px solid var(--border-light);border-radius:8px;background:#fff;padding:12px;max-height:340px;overflow:auto}
.facet-panel.hidden{display:none}
.facet-tools{display:flex;gap:10px;margin-bottom:10px}
.facet-tools button{font-size:12px;background:var(--paper-2);border:1px solid var(--border-light);border-radius:5px;padding:4px 10px;cursor:pointer}
.facet-row{display:flex;align-items:center;gap:8px;padding:5px 4px;border-radius:5px;cursor:pointer}
.facet-row:hover{background:var(--paper-2)}
.facet-row input{width:16px;height:16px;accent-color:var(--qblue)}
.facet-row .name{flex:1}
.facet-row .count{color:var(--ink-light);font-size:12px;font-variant-numeric:tabular-nums}

/* status filter chips */
.status-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.status-chip{padding:11px 16px;min-width:120px;text-align:center;background:var(--paper-2);
  border:1px solid var(--border-light);border-radius:6px;cursor:pointer;font-weight:600;color:var(--ink-light);font-size:14px}
.status-chip small{display:block;font-weight:400;font-size:11px;margin-top:2px;opacity:.8}
.status-chip.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.status-label{font-weight:700;color:var(--ink);font-size:14px;margin-top:6px}

.custom-toggle{display:inline-block;margin-top:16px;color:var(--sienna);cursor:pointer;font-weight:600;font-size:14px}
.custom-toggle:hover{text-decoration:underline}
.custom-box{margin-top:10px}
.custom-box.hidden{display:none}
.custom-box textarea{width:100%;min-height:70px;border:1px solid var(--border-light);border-radius:6px;padding:10px;font-family:var(--font-mono,monospace);font-size:13px;resize:vertical}
.custom-box .hint{font-size:12px;color:var(--ink-light);margin-top:4px}

/* params grid */
.params-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:16px}
@media(max-width:720px){.params-grid{grid-template-columns:1fr}}
.param-card{border:1px solid var(--border-light);border-radius:10px;background:#fff;padding:18px}
.param-card h3{margin:0 0 4px;font-size:15px;color:var(--ink)}
.param-card .maxinfo{color:var(--qblue);font-size:12px;margin-bottom:14px}
.numctl{display:flex;align-items:center;justify-content:center;gap:18px;margin:10px 0}
.numctl button{width:34px;height:34px;font-size:20px;border:1px solid var(--border-light);background:var(--paper-2);border-radius:6px;cursor:pointer;line-height:1}
.numctl input{width:88px;height:52px;text-align:center;font-size:22px;border:1px solid var(--border-light);border-radius:6px}
.seg{display:flex;border:1px solid var(--border-light);border-radius:6px;overflow:hidden;margin-top:6px}
.seg button{flex:1;padding:11px 0;background:var(--paper-2);border:none;cursor:pointer;font-weight:600;color:var(--ink-light)}
.seg button.active{background:var(--ink);color:#fff}
.mode-opt{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--border-light);border-radius:8px;padding:12px;margin-bottom:10px;cursor:pointer}
.mode-opt.active{border-color:var(--qblue);box-shadow:0 0 0 2px rgba(0,73,118,.15)}
.mode-opt input{margin-top:3px;accent-color:var(--qblue)}
.mode-opt .t{font-weight:700}
.mode-opt .d{font-size:12px;color:var(--ink-light)}
.tname-field{margin-top:14px}
.tname-field label{font-weight:700;font-size:14px}
.tname-field input{width:100%;margin-top:6px;padding:10px;border:1px solid var(--border-light);border-radius:6px;font-size:14px}
.tname-count{font-size:12px;color:var(--sienna);margin-top:4px}

.create-actions{margin-top:30px;display:flex;gap:14px;align-items:center}
.btn-primary{background:var(--qblue);color:#fff;border:none;border-radius:6px;padding:14px 28px;font-size:16px;font-weight:700;cursor:pointer}
.btn-primary:disabled{opacity:.45;cursor:not-allowed}
.btn-ghost{background:none;border:1px solid var(--border-light);border-radius:6px;padding:12px 18px;cursor:pointer;color:var(--ink)}
.avail-note{color:var(--ink-light);font-size:14px}
.avail-note b{color:var(--ink)}
.toast{margin-top:12px;color:var(--red);font-weight:600;font-size:14px}

/* ============================ TEST RUNNER ============================ */
.runner{display:flex;flex-direction:column;height:100vh;font-family:var(--font-q);color:#000}
.topbar{height:52px;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 14px;flex-shrink:0}
.topbar .grp{display:flex;align-items:center;gap:16px}
.topbar .item-of{font-size:14px}
.topbar .qid{font-size:12px;opacity:.75}
.topbar .timer{font-variant-numeric:tabular-nums;font-size:15px;background:rgba(255,255,255,.12);padding:5px 10px;border-radius:5px}
.topbar .modeflag{font-size:12px;text-transform:uppercase;letter-spacing:.5px;opacity:.85}
.tb-btn{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.35);border-radius:5px;padding:7px 12px;cursor:pointer;font-size:13px}
.tb-btn:hover{background:rgba(255,255,255,.12)}
.tb-btn.end{background:var(--red);border-color:var(--red);font-weight:700}
.tb-btn:disabled{opacity:.4;cursor:default}

.runner-body{flex:1;display:flex;overflow:hidden}
.qnav{width:112px;flex-shrink:0;background:#fff;border-right:1px solid #ddd;overflow-y:auto;padding:8px 6px}
.qnav .title{font-size:10px;font-weight:700;text-align:center;color:var(--ink-light);margin-bottom:8px;text-transform:uppercase}
.qnav-grid{display:grid;grid-template-columns:1fr 1fr;gap:5px}
.qnav-cell{position:relative;height:26px;border:1px solid #ccc;border-radius:4px;font-size:12px;display:flex;align-items:center;justify-content:center;cursor:pointer;background:#f7f7f7}
.qnav-cell.current{outline:2px solid var(--qblue);outline-offset:-1px;font-weight:700}
.qnav-cell.answered{background:#e6eef4}
.qnav-cell.correct{background:#d7f5e2;border-color:var(--green)}
.qnav-cell.incorrect{background:#ffdcdc;border-color:var(--red)}
.qnav-cell.marked::after{content:"";position:absolute;top:1px;right:1px;border-width:5px;border-style:solid;border-color:var(--red) var(--red) transparent transparent}

.qmain{flex:1;overflow-y:auto;padding:22px 30px 60px}
.qmain-inner{max-width:820px;margin:0 auto}
.qtop-actions{display:flex;gap:16px;align-items:center;margin-bottom:10px}
.mark-btn,.hy-btn{background:none;border:none;color:var(--qblue);cursor:pointer;font-size:13px;display:inline-flex;align-items:center;gap:5px}
.mark-btn.on{color:var(--red);font-weight:700}
.hy-btn{color:var(--sienna);font-weight:600}
.hint-btn{background:var(--paper-2);border:1px solid var(--border-light);border-radius:6px;color:var(--sienna);
  font-weight:600;font-size:12px;padding:4px 10px;cursor:pointer;display:inline-flex;align-items:center;gap:5px}
.hint-btn:hover{background:#d3e0f0}
.hint-btn.on{background:#fffbea;border-color:#f0e2a8}
.stem{font-size:15px;line-height:1.55;color:#111}
.stem p{margin:12px 0}
.stem .nowrap{white-space:nowrap}
.stem img,.explanation img,.review-body img{position:static !important;inset:auto !important;
  max-width:100% !important;width:auto !important;height:auto !important;
  border:1px solid var(--border-light);border-radius:4px;margin:8px 0;cursor:zoom-in;display:block}
/* high-yield highlight — off by default, toggled on */
.stem .selected{background:transparent;border-radius:2px;transition:background .15s}
.stem.show-hy .selected{background:var(--hy)}
/* high-yield hint block — hidden until "Show High Yield" */
.hint-block{display:none;margin:14px 0;padding:12px 14px;background:#fffbea;
  border:1px solid #f0e2a8;border-left:4px solid var(--sienna);border-radius:6px;font-size:14px;line-height:1.55}
.hint-block.show{display:block}
.hint-block .hint-tag{display:block;font-weight:700;color:var(--sienna);font-size:12px;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}
.hint-block p{margin:6px 0}
.hint-block span[aria-expanded]{border-bottom:1px dotted #999}

/* answer list (qblue chrome, mimics scraped html) — divs, not a real table,
   to avoid innerHTML table foster-parenting */
.answers{margin:16px 0;border:1px solid var(--qblue);border-bottom:5px solid var(--qblue)}
.ans-row{display:flex;align-items:flex-start;padding:9px 6px;cursor:pointer}
.ans-row+.ans-row{border-top:1px solid #e6eef2}
.ans-row:hover:not(.locked):not(.struck){background:#eef4f8}
.ans-radio{width:20px;height:20px;border-radius:50%;border:2px solid var(--qblue);flex-shrink:0;margin:1px 10px 0 4px;display:flex;align-items:center;justify-content:center}
.ans-row.selected-answer .ans-radio{background:var(--qblue)}
.ans-row.selected-answer .ans-radio::after{content:"";width:8px;height:8px;border-radius:50%;background:#fff}
.ans-letter{width:22px;flex-shrink:0;font-weight:700;margin-right:4px}
.ans-text{flex:1}
.ans-pct{width:64px;text-align:right;color:var(--ink-light);font-size:13px;flex-shrink:0;visibility:hidden}
.answers.reveal .ans-pct{visibility:visible}
.ans-mark{width:22px;flex-shrink:0;text-align:center}
.strike-btn{background:none;border:none;color:#bbb;cursor:pointer;font-size:15px;margin-left:8px;flex-shrink:0;width:22px}
.strike-btn:hover{color:var(--red)}
.ans-row.struck{opacity:.45}
.ans-row.struck .ans-text{text-decoration:line-through}
.ans-row.struck .strike-btn{color:var(--red)}
/* revealed correctness (tutor / summary) */
.answers.reveal .ans-row.is-correct{background:#e7f7ee}
.answers.reveal .ans-row.is-correct .ans-letter{color:var(--green)}
.answers.reveal .ans-row.is-wrongpick{background:#fdeaea}
.answers.reveal .ans-row.is-wrongpick .ans-letter{color:var(--red)}
.answers.reveal .ans-mark .ok{color:var(--green);font-weight:700}
.answers.reveal .ans-mark .no{color:var(--red);font-weight:700}

.submit-row{margin-top:14px;display:flex;gap:12px;align-items:center}
.btn-submit{background:var(--qblue);color:#fff;border:none;border-radius:5px;padding:11px 26px;font-weight:700;cursor:pointer;font-size:15px}
.btn-submit:disabled{opacity:.4;cursor:default}
.result-flag{font-weight:700}
.result-flag.correct{color:var(--green)}
.result-flag.incorrect{color:var(--red)}

/* explanation */
.explanation{margin-top:26px;border-top:2px solid var(--qblue);padding-top:8px}
.exp-tabbar{display:flex;gap:0;border-bottom:1px solid var(--border-light);margin-bottom:14px}
.exp-tab{padding:8px 16px;border:1px solid var(--border-light);border-bottom:none;background:var(--paper-2);border-radius:6px 6px 0 0;font-weight:600;color:var(--ink)}
.explanation h4{color:var(--sienna);font-weight:700;margin:16px 0 6px}
.explanation p{margin:10px 0;line-height:1.55}
.explanation table{border-collapse:collapse;margin:10px 0}
.explanation td,.explanation th{border:1px solid var(--border-light);padding:6px 9px}

.footbar{height:46px;background:var(--paper-2);border-top:1px solid var(--border-light);display:flex;align-items:center;justify-content:space-between;padding:0 16px;flex-shrink:0}
.footbar button{background:#fff;border:1px solid var(--border-light);border-radius:5px;padding:8px 18px;cursor:pointer;font-weight:600}
.footbar button:disabled{opacity:.4;cursor:default}

/* image zoom overlay */
.zoom-overlay{position:fixed;inset:0;background:rgba(0,0,0,.85);display:flex;align-items:center;justify-content:center;z-index:200;cursor:zoom-out}
.zoom-overlay img{max-width:94vw;max-height:94vh}

/* ============================ SUMMARY ============================ */
.summary-wrap{max-width:900px;margin:0 auto;padding:30px 24px 80px}
.summary-wrap h1{font-family:var(--font-serif);color:var(--ink)}
.score-cards{display:flex;gap:16px;flex-wrap:wrap;margin:18px 0}
.score-card{flex:1;min-width:150px;background:#fff;border:1px solid var(--border-light);border-radius:10px;padding:18px;text-align:center}
.score-card .big{font-size:34px;font-weight:800}
.score-card .lbl{color:var(--ink-light);font-size:13px;margin-top:4px}
.score-card.pct .big{color:var(--qblue)}
.score-card.right .big{color:var(--green)}
.score-card.wrong .big{color:var(--red)}
.breakdown{margin-top:20px}
.breakdown h3{font-family:var(--font-serif)}
.bd-table{width:100%;border-collapse:collapse;font-size:14px}
.bd-table th,.bd-table td{border-bottom:1px solid var(--border-light);padding:7px 8px;text-align:left}
.bd-table td.num{text-align:right;font-variant-numeric:tabular-nums}
.review-item{background:#fff;border:1px solid var(--border-light);border-radius:8px;margin-top:12px;overflow:hidden}
.review-head{display:flex;align-items:center;gap:12px;padding:12px 16px;cursor:pointer}
.review-head .rq{font-weight:700}
.review-head .badge{margin-left:auto;font-weight:700;font-size:13px}
.review-head .badge.correct{color:var(--green)}
.review-head .badge.incorrect{color:var(--red)}
.review-head .badge.omitted{color:var(--ink-light)}
.review-body{display:none;padding:0 16px 18px;font-family:var(--font-q)}
.review-item.open .review-body{display:block}
.summary-wrap .sub{color:var(--ink-light);font-size:14px;margin-top:-6px}
.review-head .qidlbl{color:var(--ink-light);font-size:13px}
.review-head .subj{color:var(--ink-light);font-size:12px;margin-left:6px}
.review-body .answers .ans-row{cursor:default}
/* progressive review reveal */
.review-controls{display:flex;align-items:center;gap:12px;margin:4px 0 14px}
.rev-toggle{background:var(--qblue);color:#fff;border:none;border-radius:6px;padding:7px 14px;font-weight:600;cursor:pointer;font-size:13px}
.rev-toggle:hover{background:#08376b}
.rev-state{font-size:12px;color:var(--ink-light)}
.review-body .ans-row.is-mine{background:#eef4f8}
.review-body .ans-row.is-mine .ans-letter{color:var(--qblue)}
.review-body .ans-mark{width:auto;flex-shrink:0;text-align:right;padding-right:6px}
.mine-tag{font-size:11px;color:var(--qblue);font-weight:700;white-space:nowrap}
.omit-note{color:var(--red);font-weight:600;font-size:13px;margin:6px 0}
.summary-actions{margin-top:26px;display:flex;gap:12px}