:root{
  --bg:#f4f7fb; --card:#ffffff; --text:#14213d; --muted:#667085; --line:#dbe3ef;
  --primary:#315efb; --primary2:#2347c7; --soft:#eef3ff; --good:#157347; --goodbg:#eaf8f0;
  --bad:#b42318; --badbg:#fff0ee; --warn:#a15c00; --warnbg:#fff7e6; --shadow:0 14px 40px rgba(20,33,61,.08);
}
*{box-sizing:border-box} body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.55}
button,input,select{font:inherit}.hidden{display:none!important}
.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.topbar-inner{max-width:1180px;margin:auto;padding:12px 22px;display:flex;align-items:center;gap:14px}.brand{font-weight:800;letter-spacing:-.02em}.brand span{color:var(--primary)}
.top-spacer{flex:1}.timer,.progress-text{font-size:14px;color:var(--muted);font-weight:650}.progress-wrap{width:160px;height:8px;border-radius:99px;background:#e9eef6;overflow:hidden}.progress-bar{height:100%;background:var(--primary);width:0;transition:.25s}
.container{max-width:1180px;margin:auto;padding:30px 22px 60px}
.hero{padding:20px 0 8px}.hero h1{font-size:clamp(28px,4vw,44px);margin:0;letter-spacing:-.035em;line-height:1.15}
.password-box{margin-top:22px;padding:18px;border:1px solid var(--line);border-radius:14px;background:#f9fbff}.password-box label{display:block;font-weight:800;font-size:14px;margin-bottom:7px}.password-box input{width:100%;max-width:420px;padding:12px 13px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--text);outline:none}.password-box input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(49,94,251,.12)}.password-help{margin-top:8px;color:var(--muted);font-size:14px}.password-error{margin-top:8px;color:var(--bad);font-size:14px;font-weight:700}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
.setup{margin-top:24px;padding:26px}.setup-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.field label{display:block;font-weight:700;font-size:14px;margin-bottom:7px}.field select{width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:12px;background:white;color:var(--text);outline:none}.field select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(49,94,251,.12)}
.toggle-row{display:flex;gap:10px;flex-wrap:wrap}.pill{border:1px solid var(--line);background:#fff;border-radius:999px;padding:10px 14px;cursor:pointer;font-weight:700;color:var(--muted)}.pill.active{border-color:var(--primary);background:var(--soft);color:var(--primary)}
.notice{margin-top:18px;padding:13px 15px;border-radius:12px;background:var(--warnbg);color:#704000;font-size:14px;border:1px solid #f4d89c}.setup-actions{display:flex;gap:12px;align-items:center;margin-top:22px;flex-wrap:wrap}
.btn{border:none;border-radius:12px;padding:11px 16px;font-weight:800;cursor:pointer;transition:.15s}.btn:hover{transform:translateY(-1px)}.btn.primary{background:var(--primary);color:white}.btn.primary:hover{background:var(--primary2)}.btn.secondary{background:#fff;color:var(--text);border:1px solid var(--line)}.btn.ghost{background:transparent;color:var(--muted)}.btn.good{background:var(--good);color:white}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.meta{font-size:13px;color:var(--muted)}
.quiz-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px;align-items:start}.question-card{padding:26px;min-height:520px}.q-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:16px}.badge{font-size:12px;border-radius:999px;padding:5px 9px;background:var(--soft);color:var(--primary);font-weight:800}.badge.gray{background:#f2f4f7;color:#667085}.badge.warn{background:var(--warnbg);color:var(--warn)}
.question-text{font-size:19px;font-weight:750;white-space:pre-wrap;margin:0 0 20px}.visual-warning{padding:10px 12px;background:var(--warnbg);border:1px solid #f1d18d;color:#704000;border-radius:10px;font-size:13px;margin:-7px 0 18px}
.options{display:grid;gap:11px}.option{display:flex;gap:11px;align-items:flex-start;border:1px solid var(--line);border-radius:14px;padding:13px 14px;background:#fff;cursor:pointer;transition:.15s}.option:hover{border-color:#aebde7;background:#fbfcff}.option input{margin-top:5px;accent-color:var(--primary)}.option.selected{border-color:var(--primary);background:var(--soft)}.option.correct{border-color:#81caa1;background:var(--goodbg)}.option.wrong{border-color:#f0a59e;background:var(--badbg)}
.subitem{border-top:1px dashed var(--line);padding-top:18px;margin-top:18px}.subitem:first-child{border-top:0;padding-top:0;margin-top:0}.subprompt{font-weight:720;margin-bottom:10px;white-space:pre-wrap}
.match-row{display:grid;grid-template-columns:1fr 34px 1fr;gap:10px;align-items:center;padding:10px 0}.match-row select{width:100%;padding:10px;border:1px solid var(--line);border-radius:10px;background:#fff}.arrow{text-align:center;color:var(--muted);font-weight:900}
.seq-list{display:grid;gap:9px}.seq-item{display:grid;grid-template-columns:36px 1fr 78px;gap:10px;align-items:center;border:1px solid var(--line);padding:10px;border-radius:12px;background:#fff}.seq-num{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--soft);color:var(--primary);font-weight:900}.seq-actions{display:flex;gap:5px}.seq-actions button{width:34px;height:34px;border-radius:9px;border:1px solid var(--line);background:white;cursor:pointer;font-weight:900}
.feedback{margin-top:20px;padding:14px;border-radius:12px;font-size:14px}.feedback.good{background:var(--goodbg);border:1px solid #aedfc1;color:#0c5c35}.feedback.bad{background:var(--badbg);border:1px solid #f0b5b0;color:#8b1e16}.feedback.warn{background:var(--warnbg);border:1px solid #f1d18d;color:#704000}.feedback strong{display:block;margin-bottom:4px}.correct-answer{white-space:pre-wrap;margin-top:5px}
.q-actions{display:flex;gap:10px;align-items:center;margin-top:26px;padding-top:18px;border-top:1px solid var(--line)}.q-actions .spacer{flex:1}
.sidebar{padding:18px;position:sticky;top:82px}.sidebar h3{font-size:14px;margin:0 0 12px}.nav-grid{display:block}.nav-group{margin:0 0 16px}.nav-group-title{font-size:12px;font-weight:850;color:var(--muted);margin:0 0 7px;display:flex;justify-content:space-between;gap:8px}.nav-group-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.navq{height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--muted);cursor:pointer;font-weight:800}.navq.answered{background:var(--soft);color:var(--primary);border-color:#b9c8f5}.navq.current{outline:2px solid var(--primary);outline-offset:1px}.navq.flagged::after{content:'•';color:#d66a00;position:absolute}.navq{position:relative}.side-stat{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-top:12px}.side-buttons{display:grid;gap:8px;margin-top:16px}.cert-message{margin-top:16px;padding:15px 18px;border-radius:14px;font-weight:850;line-height:1.5}.cert-message.pass{background:#ecfdf3;border:1px solid #a6e6bc;color:#126b3b}.cert-message.fail{background:#fff8e7;border:1px solid #f0d18a;color:#7a4a00}
.result-card{padding:28px}.score-hero{display:grid;grid-template-columns:180px 1fr;gap:26px;align-items:center}.score-ring{width:170px;height:170px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--primary) var(--pct,0%),#e8edf5 0);position:relative}.score-ring::after{content:'';position:absolute;inset:16px;border-radius:50%;background:#fff}.score-ring .inside{position:relative;z-index:2;text-align:center}.score-ring b{font-size:34px;display:block}.score-ring span{font-size:12px;color:var(--muted)}.result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}.metric{padding:13px;border:1px solid var(--line);border-radius:12px}.metric b{font-size:22px;display:block}.metric span{font-size:12px;color:var(--muted)}
.review-list{display:grid;gap:12px;margin-top:22px}.review-item{padding:16px;border:1px solid var(--line);border-radius:14px;background:#fff}.review-item h4{margin:0 0 8px;font-size:15px}.review-item p{margin:4px 0;color:var(--muted);white-space:pre-wrap;font-size:14px}.review-item.correct{border-left:5px solid var(--good)}.review-item.incorrect{border-left:5px solid var(--bad)}.review-item.unscored{border-left:5px solid var(--warn)}
.footer{text-align:center;color:var(--muted);font-size:12px;padding:28px 0}
@media(max-width:900px){.quiz-layout{grid-template-columns:1fr}.sidebar{position:static;order:-1}.nav-group-grid{grid-template-columns:repeat(10,1fr)}.sidebar h3,.side-stat{display:none}.side-buttons{grid-template-columns:1fr 1fr}.score-hero{grid-template-columns:1fr}.score-ring{margin:auto}.setup-grid{grid-template-columns:1fr}}
@media(max-width:560px){.container{padding:20px 12px 40px}.topbar-inner{padding:10px 12px}.progress-wrap{width:90px}.question-card,.setup,.result-card{padding:18px;border-radius:16px}.nav-group-grid{grid-template-columns:repeat(7,1fr)}.match-row{grid-template-columns:1fr}.arrow{transform:rotate(90deg)}.seq-item{grid-template-columns:34px 1fr}.seq-actions{grid-column:2}.result-grid{grid-template-columns:1fr 1fr}.question-text{font-size:17px}}