:root{
  --ink:#1a1f2e; --paper:#f5f1e8; --paper-2:#ece5d6; --card:#fffdf7;
  --accent:#c2410c; --accent-2:#1e3a5f; --line:#d9cfbb; --muted:#776e5e;
  --good:#15803d; --bad:#b91c1c; --review:#b45309; --shadow:rgba(40,30,15,.12);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Spline Sans',sans-serif;background:var(--paper);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;background-image:radial-gradient(circle at 1px 1px,rgba(120,100,60,.06) 1px,transparent 0);background-size:22px 22px}
.mono{font-family:'Spline Sans Mono',monospace}

header{position:sticky;top:0;z-index:50;background:var(--ink);color:var(--paper);border-bottom:3px solid var(--accent);box-shadow:0 4px 24px var(--shadow)}
.bar{max-width:1180px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:12px;flex:1;min-width:200px}
.logo .mark{width:38px;height:38px;border-radius:9px;flex-shrink:0;background:linear-gradient(135deg,var(--accent),#e8702f);display:grid;place-items:center;font-family:'Fraunces';font-weight:900;font-size:20px;color:#fff;box-shadow:0 2px 10px rgba(194,65,12,.4)}
.logo h1{font-family:'Fraunces';font-weight:600;font-size:18px;letter-spacing:.2px;line-height:1.1}
.logo p{font-size:11px;color:#9aa0ad;letter-spacing:1.5px;text-transform:uppercase}
.hud{display:flex;align-items:center;gap:14px}
.timer{font-family:'Spline Sans Mono';font-size:19px;font-weight:600;background:rgba(255,255,255,.08);padding:7px 14px;border-radius:9px;border:1px solid rgba(255,255,255,.14);min-width:96px;text-align:center}
.timer.warn{color:#fbbf24;border-color:#fbbf24}
.timer.danger{color:#f87171;border-color:#f87171;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.55}}
.progress-wrap{height:4px;background:rgba(255,255,255,.1)}
.progress-bar{height:100%;width:0;background:linear-gradient(90deg,var(--accent),#fbbf24);transition:width .4s ease}

main{max-width:1180px;margin:0 auto;padding:0 24px 80px}

.cover{margin:42px auto;max-width:760px;padding:48px 44px;border-radius:18px;position:relative;overflow:hidden;background:var(--card);border:1px solid var(--line);box-shadow:0 10px 40px var(--shadow)}
.cover::before{content:"";position:absolute;top:-60px;right:-60px;width:240px;height:240px;border-radius:50%;background:radial-gradient(circle,rgba(194,65,12,.12),transparent 70%)}
.eyebrow{font-size:12px;letter-spacing:3px;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:14px}
.cover h2{font-family:'Fraunces';font-weight:900;font-size:clamp(32px,6vw,52px);line-height:1.02;letter-spacing:-1px}
.cover .sub{font-size:17px;color:var(--muted);margin-top:14px;max-width:560px}
.meta-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-top:34px}
.meta-grid div{background:var(--card);padding:16px 18px}
.meta-grid .k{font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:var(--muted)}
.meta-grid .v{font-family:'Fraunces';font-weight:600;font-size:22px;margin-top:3px}
.field{margin-top:26px;display:flex;gap:16px;flex-wrap:wrap}
.field label{flex:1;min-width:200px;font-size:13px;font-weight:600;color:var(--muted)}
.field input{display:block;width:100%;margin-top:6px;padding:11px 14px;border:1px solid var(--line);border-radius:9px;background:var(--paper);font-family:inherit;font-size:15px;color:var(--ink)}
.field input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(194,65,12,.12)}
.rules{margin-top:30px;border-top:1px dashed var(--line);padding-top:24px}
.rules h3{font-family:'Fraunces';font-size:15px;letter-spacing:.5px;margin-bottom:12px;text-transform:uppercase;color:var(--accent-2)}
.rules li{list-style:none;padding-left:26px;position:relative;margin-bottom:8px;font-size:14.5px;color:#3c3a33}
.rules li::before{content:"";position:absolute;left:4px;top:9px;width:8px;height:8px;border-radius:50%;background:var(--accent)}

.btn{cursor:pointer;border:none;font-family:'Spline Sans';font-weight:600;font-size:15px;padding:14px 30px;border-radius:11px;transition:transform .15s,box-shadow .15s,background .15s}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 16px rgba(194,65,12,.32)}
.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 22px rgba(194,65,12,.42)}
.btn-ghost{background:transparent;color:var(--accent-2);border:1.5px solid var(--line)}
.btn-ghost:hover:not(:disabled){border-color:var(--accent-2);background:var(--paper-2)}
.btn-review{background:#fff7ed;color:var(--review);border:1.5px solid #fcd9a8}
.btn-review:hover{background:#ffedd5}
.btn-review.active{background:var(--review);color:#fff;border-color:var(--review)}
.start-row{margin-top:34px;display:flex;gap:14px;align-items:center;flex-wrap:wrap}

.exam-grid{display:grid;grid-template-columns:1fr 300px;gap:28px;margin-top:36px;align-items:start}
@media(max-width:880px){.exam-grid{grid-template-columns:1fr}.navigator{order:-1}}

.qcard{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:30px 32px;box-shadow:0 6px 26px var(--shadow);min-height:360px;display:flex;flex-direction:column}
.qcard-top{display:flex;align-items:center;gap:14px;margin-bottom:8px;flex-wrap:wrap}
.sec-tag{font-family:'Spline Sans Mono';font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:#fff;background:var(--accent-2);padding:5px 11px;border-radius:7px}
.marks-tag{font-family:'Spline Sans Mono';font-size:12px;color:var(--muted);background:var(--paper-2);padding:5px 12px;border-radius:20px}
.qnum{font-family:'Fraunces';font-weight:900;font-size:40px;color:var(--accent);line-height:1;margin-left:auto}
.qtext{font-size:20px;font-weight:500;margin:14px 0 6px;line-height:1.45}
.opts{margin-top:22px;display:flex;flex-direction:column;gap:11px}
.opt{display:flex;align-items:center;gap:12px;padding:14px 17px;border:1.5px solid var(--line);border-radius:11px;cursor:pointer;font-size:16px;transition:all .15s;background:var(--paper)}
.opt:hover{border-color:var(--accent);background:#fff}
.opt input{accent-color:var(--accent);width:18px;height:18px;cursor:pointer}
.opt.sel{border-color:var(--accent);background:#fff6f0;font-weight:500}
.answer-field{margin-top:22px}
.answer-field input,.answer-field textarea{width:100%;padding:13px 16px;border:1.5px solid var(--line);border-radius:11px;font-family:inherit;font-size:16px;background:var(--paper);color:var(--ink);resize:vertical}
.answer-field input:focus,.answer-field textarea:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(194,65,12,.1)}
.answer-field .hint{font-size:12.5px;color:var(--muted);margin-top:8px}

.qcard-foot{margin-top:auto;padding-top:26px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.qcard-foot .spacer{flex:1}

.navigator{position:sticky;top:90px;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 6px 26px var(--shadow)}
.nav-ring{display:flex;align-items:center;gap:16px;margin-bottom:18px}
.ring-box{position:relative;width:84px;height:84px;flex-shrink:0}
.ring-box svg{transform:rotate(-90deg)}
.ring-box .ctr{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1}
.ring-box .ctr b{font-family:'Fraunces';font-weight:900;font-size:24px}
.ring-box .ctr span{font-size:10px;color:var(--muted);margin-top:2px}
.nav-stats{flex:1;font-size:13px}
.nav-stats .row{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.dot{width:11px;height:11px;border-radius:3px;flex-shrink:0}
.dot.answered{background:var(--accent)} .dot.review{background:var(--review)} .dot.blank{background:var(--paper-2);border:1px solid var(--line)}
.nav-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.nav-cell{aspect-ratio:1;border-radius:9px;border:1.5px solid var(--line);background:var(--paper);font-family:'Spline Sans Mono';font-weight:600;font-size:13px;color:var(--muted);cursor:pointer;display:grid;place-items:center;position:relative;transition:transform .12s,box-shadow .12s}
.nav-cell:hover{transform:translateY(-2px);box-shadow:0 4px 10px var(--shadow)}
.nav-cell.answered{background:var(--accent);color:#fff;border-color:var(--accent)}
.nav-cell.review{background:var(--review);color:#fff;border-color:var(--review)}
.nav-cell.answered.review{background:linear-gradient(135deg,var(--accent) 50%,var(--review) 50%);color:#fff}
.nav-cell.current{outline:3px solid var(--accent-2);outline-offset:2px}
.nav-cell .flag{position:absolute;top:-5px;right:-5px;width:14px;height:14px;background:var(--review);border-radius:50%;border:2px solid var(--card);display:none}
.nav-cell.review .flag{display:block}
.nav-divider{height:1px;background:var(--line);margin:18px 0}
.nav-submit{width:100%;text-align:center}

#reviewScreen{display:none}
.panel{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:32px;margin-top:36px;box-shadow:0 6px 26px var(--shadow)}
.panel h3{font-family:'Fraunces';font-weight:600;font-size:24px;margin-bottom:6px}
.panel .lead{color:var(--muted);margin-bottom:20px}
.rev-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.rev-item{display:flex;align-items:center;gap:12px;padding:13px 16px;border:1.5px solid var(--line);border-radius:11px;cursor:pointer;background:var(--paper);transition:all .15s}
.rev-item:hover{border-color:var(--review);background:#fff}
.rev-item .rid{width:34px;height:34px;border-radius:8px;background:var(--review);color:#fff;font-family:'Spline Sans Mono';font-weight:600;display:grid;place-items:center;flex-shrink:0}
.rev-item .rtx{font-size:13px;line-height:1.3}
.rev-empty{padding:30px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:12px}
.summary-counts{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:14px;margin:22px 0}
.sc-box{text-align:center;padding:18px;border-radius:13px;border:1px solid var(--line);background:var(--paper)}
.sc-box .n{font-family:'Fraunces';font-weight:900;font-size:32px}
.sc-box .l{font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--muted);margin-top:2px}
.final-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:10px}

#results{display:none;margin-top:40px}
.score-card{background:linear-gradient(150deg,var(--accent-2),#0f2540);color:var(--paper);border-radius:20px;padding:44px;text-align:center;box-shadow:0 14px 44px rgba(15,37,64,.35);position:relative;overflow:hidden}
.score-card::after{content:"";position:absolute;bottom:-80px;left:-40px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(251,191,36,.18),transparent 70%)}
.score-ring{width:150px;height:150px;margin:0 auto 18px;position:relative}
.score-ring svg{transform:rotate(-90deg)}
.score-ring .val{position:absolute;inset:0;display:grid;place-items:center;font-family:'Fraunces';font-weight:900;font-size:40px}
.score-card h3{font-family:'Fraunces';font-size:26px;font-weight:600;margin-bottom:4px}
.band{display:inline-block;margin-top:14px;padding:8px 20px;border-radius:30px;font-weight:600;font-size:14px;letter-spacing:.5px}
.score-note{font-size:13.5px;color:#b9c4d4;margin:18px auto 0;max-width:440px}
.breakdown{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-top:24px}
.bd{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:18px;text-align:center}
.bd .lab{font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--muted)}
.bd .sc{font-family:'Fraunces';font-weight:900;font-size:30px;margin-top:4px}
.bd .mx{font-size:13px;color:var(--muted)}
.key-toggle{margin-top:30px;text-align:center}
#answerKey{display:none;margin-top:24px}
.key-q{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--line);border-radius:12px;padding:16px 20px;margin-top:12px}
.key-q.correct{border-left-color:var(--good)} .key-q.wrong{border-left-color:var(--bad)} .key-q.manual{border-left-color:var(--accent)}
.key-q .kh{display:flex;gap:12px;align-items:center;font-weight:600;font-size:15px}
.key-q .badge{font-family:'Spline Sans Mono';font-size:11px;padding:3px 9px;border-radius:6px;font-weight:600}
.badge.bg-good{background:#dcfce7;color:var(--good)} .badge.bg-bad{background:#fee2e2;color:var(--bad)} .badge.bg-man{background:#ffedd5;color:var(--accent)}
.key-q .qline{flex:1}
.key-q .ans{margin-top:10px;font-size:14px} .key-q .ans b{color:var(--accent-2)}
.key-q .your{margin-top:5px;font-size:13.5px;color:var(--muted)}
.key-q .rsn{margin-top:8px;font-size:13.5px;color:#4a4639;background:var(--paper);padding:10px 13px;border-radius:8px}

footer{text-align:center;padding:30px;color:var(--muted);font-size:12.5px;letter-spacing:.5px}
.hidden{display:none!important}

/* ---- cover form decorations ---- */
.req{color:var(--accent);font-weight:700;margin-left:2px}
.opt-tag{display:inline-block;margin-left:8px;padding:1px 7px;border-radius:6px;background:var(--paper-2);color:var(--muted);font-size:10px;letter-spacing:1px;text-transform:uppercase;font-weight:600}
.cover-error{display:none;margin-top:18px;background:#fee2e2;color:var(--bad);border:1px solid #fecaca;border-radius:10px;padding:12px 16px;font-size:13.5px}
.cover-error.show{display:block}
.cover-error div{padding:1px 0}

/* ---- multi-select (uses .opt + checkbox) ---- */
.opt input[type=checkbox]{accent-color:var(--accent);width:18px;height:18px;cursor:pointer;border-radius:4px}

/* ---- drag-and-drop bucket layout ---- */
.dd-wrap{margin-top:22px;display:flex;flex-direction:column;gap:18px}
.dd-pool{border:1.5px dashed var(--line);border-radius:13px;padding:14px 16px;background:var(--paper)}
.dd-pool-label,.dd-bucket-label{font-family:'Spline Sans Mono';font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:var(--muted);margin-bottom:10px;font-weight:600}
.dd-pool-drop{display:flex;flex-wrap:wrap;gap:9px;min-height:46px}
.dd-buckets{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px}
.dd-bucket{border:1.5px solid var(--line);border-radius:13px;padding:14px;background:var(--card);transition:border-color .15s,background .15s}
.dd-bucket-label{color:var(--accent-2)}
.dd-bucket-drop{display:flex;flex-direction:column;gap:8px;min-height:90px;padding:6px;border-radius:9px;background:var(--paper);border:1px dashed var(--line);transition:border-color .15s,background .15s}
.dd-pool-drop.drag-over,.dd-bucket-drop.drag-over{background:#fff6f0;border-color:var(--accent);border-style:solid}
.dd-item{display:inline-flex;align-items:center;gap:8px;padding:10px 13px;background:#fff;border:1.5px solid var(--line);border-radius:9px;font-size:14px;font-weight:500;cursor:grab;user-select:none;transition:transform .12s,box-shadow .12s,border-color .12s}
.dd-item::before{content:"⋮⋮";font-family:'Spline Sans Mono';color:var(--muted);font-size:14px;line-height:1}
.dd-item:hover{border-color:var(--accent);box-shadow:0 4px 14px var(--shadow)}
.dd-item.dragging{opacity:.45;cursor:grabbing}
.dd-bucket-drop .dd-item{background:#fff6f0;border-color:#fcd9a8}

/* ---- verdict (pass/fail) result card ---- */
.verdict-card{position:relative;overflow:hidden;border-radius:22px;padding:48px 36px 38px;text-align:center;color:#fff;box-shadow:0 16px 50px rgba(15,37,64,.32)}
.verdict-card.pass{background:radial-gradient(circle at 30% -10%,rgba(251,191,36,.35),transparent 55%),linear-gradient(150deg,#0f3d2e,#0c5132 55%,#0a6b3f)}
.verdict-card.fail{background:radial-gradient(circle at 80% -10%,rgba(194,65,12,.25),transparent 55%),linear-gradient(150deg,var(--accent-2),#0f2540)}
.verdict-card::before{content:"";position:absolute;top:-80px;right:-60px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.10),transparent 70%);pointer-events:none}
.verdict-eyebrow{font-family:'Spline Sans Mono';letter-spacing:6px;font-size:11px;font-weight:600;color:rgba(255,255,255,.7)}
.verdict-card.pass .verdict-eyebrow{color:#fbbf24}
.verdict-headline{font-family:'Fraunces';font-weight:900;font-size:clamp(36px,5vw,52px);line-height:1.05;margin-top:10px;letter-spacing:-.5px}
.verdict-sub{margin:14px auto 0;max-width:520px;font-size:15px;color:rgba(255,255,255,.82);line-height:1.55}
.verdict-score{margin:28px auto 4px;display:inline-flex;flex-direction:column;align-items:center;gap:6px;padding:18px 32px;border-radius:16px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);min-width:240px}
.vs-num{font-family:'Fraunces';font-weight:900;font-size:54px;line-height:1;letter-spacing:-1px}
.vs-of{font-size:24px;opacity:.55;margin-left:4px}
.vs-meta{font-size:12.5px;color:rgba(255,255,255,.78);letter-spacing:.5px}
.verdict-note{margin:22px auto 0;font-size:13px;color:rgba(255,255,255,.7);max-width:480px}
.verdict-email{margin-top:8px;font-size:13px;color:#fbbf24}

/* ---- answer-key tweaks ---- */
.key-q .kh{flex-wrap:wrap}
.key-marks{margin-left:auto;font-size:12px;color:var(--muted);background:var(--paper);padding:2px 9px;border-radius:6px}
.key-q .ans b,.key-q .your b{color:var(--accent-2)}