:root{
  --navy:#17263c; --navy2:#213650; --paper:#f4f6f8; --card:#fff; --ink:#172033;
  --muted:#687386; --line:#dfe4ea; --teal:#138d86; --teal2:#0b6f69; --green:#257a50;
  --amber:#a36b00; --red:#a53b34; --soft-green:#e7f4ed; --soft-amber:#fff4dc; --soft-red:#fbe9e7;
  --shadow:0 8px 28px rgba(24,38,60,.09); --radius:14px;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box} body{margin:0;background:var(--paper);color:var(--ink);line-height:1.45}
button,input,select{font:inherit} button{cursor:pointer}
a{color:var(--teal2);text-decoration:none} a:hover{text-decoration:underline}
.shell{min-height:100vh}.topbar{background:var(--navy);color:#fff;padding:18px 26px;display:flex;align-items:center;justify-content:space-between;gap:20px;box-shadow:0 2px 8px rgba(0,0,0,.14)}
.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:38px;height:38px;border-radius:10px;background:#56d3c9;color:#102137;display:grid;place-items:center;font-weight:900;font-size:21px}.brand-title{font-weight:800;letter-spacing:.08em;font-size:14px}.brand-sub{font-size:12px;color:#bfc9d7;margin-top:2px}.topmeta{display:flex;align-items:center;gap:12px;font-size:13px;color:#d4dbe5}.pill{border:1px solid rgba(255,255,255,.24);border-radius:999px;padding:6px 10px;white-space:nowrap}.timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:17px;letter-spacing:.03em}
.container{width:min(1180px,calc(100% - 32px));margin:30px auto 60px}.hero{background:linear-gradient(135deg,#fff,#f7fbfb);border:1px solid var(--line);border-radius:18px;padding:32px;box-shadow:var(--shadow)}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:800;color:var(--teal2)}h1{margin:8px 0 10px;font-size:clamp(28px,4vw,44px);line-height:1.08}h2{margin:0 0 16px;font-size:24px}h3{margin:0 0 10px;font-size:18px}.lead{font-size:17px;color:#4f5d70;max-width:800px}.verified{display:inline-flex;align-items:center;gap:7px;margin-top:16px;background:var(--soft-green);color:#1d6542;padding:7px 10px;border-radius:999px;font-weight:700;font-size:13px}
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:24px}.metric{border:1px solid var(--line);border-radius:12px;background:#fff;padding:16px}.metric strong{display:block;font-size:25px}.metric span{font-size:12px;color:var(--muted)}
.action-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:18px;margin-top:22px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.card p{color:#556173}.btn{border:0;border-radius:10px;padding:11px 16px;font-weight:750;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn-primary{background:var(--teal);color:#fff}.btn-primary:hover{background:var(--teal2)}.btn-secondary{background:#fff;color:var(--ink);border:1px solid #cfd6df}.btn-danger{background:#a43d39;color:#fff}.btn-ghost{background:#eef2f5;color:#263750}.btn-small{padding:8px 11px;font-size:13px}.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.note{font-size:13px;color:var(--muted)}
.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:18px}.domain-list{display:grid;gap:10px}.domain-line{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center;border-bottom:1px solid #edf0f3;padding:8px 0}.domain-line:last-child{border:0}.domain-line b{font-size:13px}.domain-line span{font-size:13px;color:var(--muted)}
.history{margin-top:20px}.history table{width:100%;border-collapse:collapse;font-size:14px}.history th,.history td{text-align:left;padding:10px;border-bottom:1px solid var(--line)}.history th{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.06em}
/* Exam */
.exam-wrap{width:min(1280px,calc(100% - 28px));margin:22px auto 50px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:18px}.exam-card{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);min-height:570px;display:flex;flex-direction:column}.exam-head{padding:18px 22px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;align-items:center}.question-num{font-weight:800}.qtype{font-size:12px;color:var(--muted);background:#f1f4f6;border-radius:999px;padding:5px 9px}.question-body{padding:28px 28px 22px;flex:1}.question-text{font-size:20px;font-weight:650;line-height:1.5;margin-bottom:22px;white-space:pre-line}.options{display:grid;gap:11px}.option{border:1px solid #cfd7df;border-radius:11px;padding:14px 16px;display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start;background:#fff;transition:.14s}.option:hover{border-color:#83aaa7;background:#fbfefe}.option.selected{border-color:var(--teal);background:#ebf8f6;box-shadow:0 0 0 1px var(--teal)}.letter{width:30px;height:30px;border-radius:50%;border:1px solid #b9c3ce;display:grid;place-items:center;font-weight:800}.selected .letter{background:var(--teal);color:#fff;border-color:var(--teal)}.exam-foot{padding:16px 20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:12px}.exam-foot-left,.exam-foot-right{display:flex;gap:9px}.flagged-on{background:#fff2d3;color:#815a00;border:1px solid #e8c365}
.palette{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:18px;align-self:start;position:sticky;top:16px}.palette h3{font-size:15px}.progressbar{height:8px;border-radius:10px;background:#e9edf1;overflow:hidden;margin:10px 0 8px}.progressbar>div{height:100%;background:var(--teal);width:0}.palette-meta{font-size:12px;color:var(--muted);display:flex;justify-content:space-between;margin-bottom:16px}.qgrid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.qnav{height:38px;border-radius:8px;border:1px solid #d3dae2;background:#fff;font-size:13px;font-weight:700}.qnav.answered{background:#e7f4ed;border-color:#a8d1b9;color:#1d6642}.qnav.current{outline:2px solid var(--navy);outline-offset:1px}.qnav.flagged{box-shadow:inset 0 -4px 0 #d99c1d}.legend{display:flex;flex-wrap:wrap;gap:10px;margin-top:15px;font-size:11px;color:var(--muted)}.legend span:before{content:"";display:inline-block;width:9px;height:9px;border-radius:2px;margin-right:5px;background:#fff;border:1px solid #cfd6de}.legend .lg-answered:before{background:#e7f4ed;border-color:#a8d1b9}.legend .lg-flagged:before{background:#f3c45f;border-color:#d99c1d}
/* Results */
.results{width:min(1120px,calc(100% - 32px));margin:26px auto 60px}.result-banner{background:var(--navy);color:#fff;border-radius:16px;padding:26px;display:grid;grid-template-columns:1.1fr 1fr;gap:22px}.scoreline{font-size:42px;font-weight:850}.scoreline small{font-size:20px;font-weight:650}.passbadge{display:inline-block;background:#dff3e8;color:#1f6644;padding:6px 10px;border-radius:7px;font-weight:800;margin-top:8px}.failbadge{display:inline-block;background:#fae5e3;color:#8d302b;padding:6px 10px;border-radius:7px;font-weight:800;margin-top:8px}.recommend{font-size:25px;font-weight:780;margin:5px 0}.result-banner p{color:#d3dbe6}.result-actions{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0 20px}.results-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}.domain-card,.study-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--shadow)}.domain-score{display:grid;grid-template-columns:1fr 70px 55px;gap:10px;align-items:center;margin:13px 0}.domain-name{font-size:13px}.bar{height:8px;background:#edf0f2;border-radius:99px;overflow:hidden}.bar>i{display:block;height:100%;background:var(--teal)}.pct{text-align:right;font-weight:750;font-size:13px}.tag{display:inline-block;padding:3px 7px;border-radius:999px;font-size:11px;font-weight:750}.tag.strong{background:var(--soft-green);color:var(--green)}.tag.review{background:var(--soft-amber);color:var(--amber)}.tag.priority{background:var(--soft-red);color:var(--red)}.remediation{margin:0;padding-left:20px}.remediation li{margin:10px 0}.study-links{display:grid;gap:10px}.study-link{border:1px solid var(--line);border-radius:10px;padding:11px 12px}.study-link b{display:block;font-size:13px}.study-link span{font-size:12px;color:var(--muted)}
.review-section{margin-top:20px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:22px}.review-item{border-top:1px solid var(--line);padding:16px 0}.review-item:first-of-type{border-top:0}.review-head{display:flex;justify-content:space-between;gap:14px}.status-correct{color:var(--green);font-weight:800}.status-wrong{color:var(--red);font-weight:800}.review-q{font-weight:650;margin:8px 0}.review-answer{font-size:13px;color:#4d5969;margin:4px 0}.explain{background:#f7f9fa;border-left:3px solid var(--teal);padding:10px 12px;margin-top:9px;font-size:13px}.review-meta{font-size:11px;color:var(--muted);margin-top:8px}.filter-row{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.filter-row button.active{background:var(--navy);color:#fff}
.modal-backdrop{position:fixed;inset:0;background:rgba(14,24,38,.55);display:grid;place-items:center;padding:20px;z-index:50}.modal{background:#fff;border-radius:14px;width:min(520px,100%);padding:24px;box-shadow:0 20px 70px rgba(0,0,0,.28)}.modal h3{font-size:21px}
.footer{width:min(1180px,calc(100% - 32px));margin:30px auto;color:var(--muted);font-size:12px;text-align:center}.source-links{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:6px}
@media(max-width:900px){.metric-grid{grid-template-columns:repeat(2,1fr)}.action-grid,.info-grid,.results-grid,.result-banner{grid-template-columns:1fr}.exam-wrap{grid-template-columns:1fr}.palette{position:static}.qgrid{grid-template-columns:repeat(8,1fr)}.exam-card{min-height:auto}}
@media(max-width:560px){.topbar{padding:14px 16px}.topmeta .pill{display:none}.container,.results{width:min(100% - 20px,1180px);margin-top:18px}.hero{padding:22px}.metric-grid{grid-template-columns:1fr 1fr}.metric strong{font-size:21px}.exam-wrap{width:calc(100% - 14px);margin-top:10px}.question-body{padding:20px 16px}.question-text{font-size:18px}.qgrid{grid-template-columns:repeat(5,1fr)}.exam-foot{align-items:stretch}.exam-foot-left,.exam-foot-right{flex:1}.exam-foot .btn{flex:1;padding:10px 8px}.topmeta{gap:7px}.timer{font-size:15px}.result-banner{padding:20px}.scoreline{font-size:34px}}
@media print{body{background:#fff}.topbar,.result-actions,.filter-row,.footer{display:none!important}.results{width:100%;margin:0}.result-banner{background:#fff!important;color:#111;border:1px solid #bbb}.result-banner p{color:#444}.domain-card,.study-card,.review-section{box-shadow:none;break-inside:avoid}.review-item{break-inside:avoid}}