:root{--navy:#0f172a;--blue:#1d4ed8;--blue-soft:#dbeafe;--cyan:#06b6d4;--gold:#f59e0b;--bg:#f8fafc;--card:#fff;--muted:#64748b;--line:#e2e8f0;--danger:#dc2626;--success:#16a34a;--marked:#f59e0b;font-family:Arial,Times New Roman,sans-serif}*{box-sizing:border-box}body{background:radial-gradient(circle at top left, #dbeafe 0, transparent 32%), var(--bg);color:var(--navy);margin:0}button,input,select{font:inherit}button{cursor:pointer}.loading-screen{place-items:center;min-height:100vh;font-weight:700;display:grid}.toast-error{z-index:99;color:#991b1b;background:#fee2e2;border:1px solid #fecaca;border-radius:12px;padding:12px 18px;position:fixed;top:16px;left:50%;transform:translate(-50%);box-shadow:0 16px 40px #0f172a26}.landing{width:min(1180px,100% - 32px);margin:0 auto;padding:36px 0 52px}.hero{color:#fff;background:linear-gradient(135deg,#0f172a,#1e3a8a);border-radius:28px;grid-template-columns:1.4fr 420px;align-items:stretch;gap:28px;padding:36px;display:grid;box-shadow:0 24px 80px #0f172a38}.hero-copy{min-width:0}.brand-strip{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1a;border:1px solid #ffffff29;border-radius:20px;align-items:center;gap:14px;margin-bottom:18px;padding:10px 14px;display:inline-flex}.brand-logo{object-fit:contain;background:#fffffff0;border-radius:18px;width:86px;height:86px;padding:8px;box-shadow:0 12px 28px #00000038}.brand-label{letter-spacing:.08em;text-transform:uppercase;color:#fff;margin:0 0 4px;font-size:.95rem;font-weight:900}.eyebrow{color:#93c5fd;text-transform:uppercase;letter-spacing:.12em;margin:0 0 10px;font-size:.8rem;font-weight:800}h1{letter-spacing:-.05em;margin:0 0 18px;font-size:clamp(2.2rem,5vw,4.7rem);line-height:.97}.subtitle{color:#dbeafe;max-width:720px;font-size:1.05rem;line-height:1.7}.hero-badges{flex-wrap:wrap;gap:10px;margin-top:28px;display:flex}.hero-badges span,.pill{background:#ffffff1f;border:1px solid #ffffff2e;border-radius:999px;align-items:center;padding:7px 12px;font-size:.85rem;font-weight:700;display:inline-flex}.start-card{color:var(--navy);background:#fffffff5;border-radius:22px;padding:24px;box-shadow:0 16px 55px #0000002e}.start-card h2{margin:0 0 16px}label{gap:8px;margin-bottom:16px;font-weight:700;display:grid}input,select{background:#fff;border:1px solid #cbd5e1;border-radius:14px;outline:none;padding:13px 14px}input:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 4px #1d4ed81f}.primary-btn,.secondary-btn,.submit-btn,.ghost-btn{border:0;border-radius:14px;padding:12px 16px;font-weight:800;transition:all .18s}.primary-btn{background:linear-gradient(135deg, var(--blue), #0ea5e9);color:#fff;width:100%}.primary-btn:hover,.submit-btn:hover{filter:brightness(1.05);transform:translateY(-1px)}.primary-btn:disabled,.secondary-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.secondary-btn{color:var(--navy);background:#e2e8f0}.ghost-btn{color:var(--blue);background:#fff;border:1px solid #bfdbfe;padding:9px 12px}.submit-btn{background:var(--navy);color:#fff;width:100%}.small-note{color:var(--muted);font-size:.86rem;line-height:1.5}.info-grid{grid-template-columns:1fr 1fr;gap:22px;margin-top:26px;display:grid}.panel{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 14px 40px #0f172a12}.panel h3{margin:0 0 12px;font-size:1.2rem}.clean-list{margin:12px 0 0;padding-left:18px;line-height:1.8}.package-list{gap:12px;display:grid}.package-card{border:1px solid var(--line);background:#f8fafc;border-radius:16px;padding:14px}.package-card.active{background:#eff6ff;border-color:#93c5fd}.package-card.draft{opacity:.72}.package-card p{color:var(--muted);margin:7px 0}.meta{flex-wrap:wrap;gap:8px;display:flex}.meta span{color:#334155;border:1px solid var(--line);background:#fff;border-radius:999px;padding:4px 8px;font-size:.78rem;font-weight:700}.leaderboard{grid-column:1/-1}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:.95rem}th,td{border-bottom:1px solid var(--line);text-align:left;padding:12px}th{text-transform:uppercase;letter-spacing:.04em;background:#f1f5f9;font-size:.82rem}.test-shell{background:#f1f5f9;grid-template-columns:300px 1fr;min-height:100vh;display:grid}.test-sidebar{background:var(--navy);color:#fff;flex-direction:column;gap:16px;height:100vh;padding:18px;display:flex;position:sticky;top:0;overflow-y:auto}.timer-card{background:#ffffff14;border:1px solid #ffffff21;border-radius:18px;gap:8px;padding:18px;display:grid}.timer-card span,.timer-card small{color:#cbd5e1}.timer-card strong{letter-spacing:-.04em;font-size:2.2rem}.timer-card .danger{color:#fca5a5}.warning-box{background:#ffffff14;border:1px solid #ffffff21;border-radius:18px;gap:10px;padding:14px;font-size:.9rem;display:grid}.number-grid{grid-template-columns:repeat(5,1fr);gap:8px;display:grid}.num-btn{color:#fff;background:#ffffff14;border:1px solid #ffffff29;border-radius:12px;height:42px;font-weight:800}.num-btn.answered{background:#22c55ecc}.num-btn.marked{box-shadow:inset 0 -4px 0 var(--marked)}.num-btn.current{outline:3px solid #38bdf8}.question-area{width:min(980px,100%);margin:0 auto;padding:24px}.question-top{justify-content:space-between;align-items:center;gap:14px;margin-bottom:14px;display:flex}.pill{background:var(--blue-soft);color:#1e3a8a;border:1px solid #bfdbfe;margin-right:7px}.pill.muted{color:#475569;border-color:var(--line);background:#fff}.question-counter{color:#475569;font-weight:800}.question-card{border:1px solid var(--line);background:#fff;border-radius:24px;padding:26px;box-shadow:0 16px 40px #0f172a12}.question-text{font-size:1.08rem;line-height:1.75}.question-media{border:1px solid var(--line);text-align:center;background:#f8fafc;border-radius:18px;margin:18px 0;padding:16px;overflow-x:auto}.options{gap:12px;margin-top:22px;display:grid}.option{text-align:left;background:#f8fafc;border:1px solid #cbd5e1;border-radius:16px;grid-template-columns:44px 1fr;align-items:center;gap:12px;padding:12px;display:grid}.option:hover{background:#eff6ff;border-color:#60a5fa}.option.selected{border-color:var(--blue);background:#eff6ff;box-shadow:0 0 0 4px #1d4ed81f}.option-key{background:#fff;border:1px solid #cbd5e1;border-radius:12px;place-items:center;width:38px;height:38px;font-weight:900;display:grid}.option-text svg{max-width:100%;height:auto;display:block}.bottom-nav{grid-template-columns:1fr 1fr 1fr;gap:12px;margin-top:18px;display:grid}.marked-action{color:#92400e;background:#fef3c7}.result-page{width:min(980px,100% - 32px);margin:0 auto;padding:42px 0}.result-card{color:#fff;text-align:center;background:linear-gradient(135deg,#0f172a,#1d4ed8);border-radius:28px;padding:34px;box-shadow:0 24px 80px #0f172a2e}.result-card h1{margin:6px 0 20px;font-size:clamp(4rem,14vw,8rem)}.result-grid{grid-template-columns:repeat(4,1fr);gap:14px;margin:20px 0;display:grid}.result-grid div{background:#ffffff1f;border:1px solid #ffffff2e;border-radius:18px;padding:16px}.result-grid span{color:#dbeafe;font-size:.85rem;display:block}.result-grid strong{font-size:1.8rem;display:block}.review-panel{border:1px solid var(--line);background:#fff;border-radius:24px;margin-top:22px;padding:24px}.review{border:1px solid var(--line);background:#f8fafc;border-radius:14px;margin-bottom:10px;padding:12px 14px}.review.correct{background:#f0fdf4;border-color:#bbf7d0}.review.wrong{background:#fef2f2;border-color:#fecaca}.review 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