:root{--bg:#f6f7fb;--panel:#fff;--text:#111827;--muted:#64748b;--border:#dbe3ef;--blue:#1d4ed8;--green:#047857;--amber:#b45309;--red:#b91c1c;--shadow:0 12px 28px rgba(15,23,42,.08)}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.topbar{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}.brand{font-weight:900;color:#0f172a;text-decoration:none;font-size:1.2rem}nav{display:flex;gap:14px;align-items:center}nav a,nav button{color:#334155;text-decoration:none;background:none;border:0;font:inherit;cursor:pointer}.nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 16px;border-radius:8px;background:var(--blue);border:1px solid var(--blue);color:#fff;text-decoration:none;font-weight:800;cursor:pointer}.btn.secondary{background:#fff;color:#1f2937;border-color:var(--border)}.btn.small{min-height:32px;padding:0 10px;font-size:.9rem}.btn.full{width:100%}.nav-form{margin:0}.page-shell{max-width:1180px;margin:0 auto;padding:28px}.hero{min-height:420px;display:flex;align-items:center;border-bottom:1px solid var(--border);margin-bottom:28px}.hero h1{font-size:clamp(2.2rem,5vw,4.8rem);margin:0 0 12px}.hero p{max-width:680px;color:#475569;font-size:1.15rem}.hero-actions{display:flex;gap:12px;margin-top:20px}.grid{display:grid;gap:18px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.card,.price-card,.test-item,.stat{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);padding:22px}.price-card h3{margin:0 0 8px}.price{font-size:2rem;font-weight:900;margin:8px 0 18px}.alert{padding:12px 14px;border-radius:8px;margin-bottom:18px;border:1px solid var(--border);background:#fff}.alert.error{border-color:#fecaca;background:#fff1f2;color:var(--red)}.alert.success{border-color:#bbf7d0;background:#f0fdf4;color:var(--green)}.alert.warn{border-color:#fed7aa;background:#fff7ed;color:var(--amber)}label{display:block;font-weight:700;margin:12px 0 6px}input,select,textarea{width:100%;border:1px solid var(--border);border-radius:8px;min-height:42px;padding:9px 11px;font:inherit;background:#fff}textarea{min-height:96px}.check{display:flex;gap:9px;align-items:flex-start}.check input{width:auto;min-height:auto;margin-top:5px}.divider{text-align:center;color:var(--muted);margin:14px 0}.page-title,.dashboard-head{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:18px}.pill{display:inline-flex;align-items:center;min-height:28px;padding:0 10px;border-radius:999px;background:#eef2ff;color:#3730a3;font-weight:800;font-size:.86rem}.test-list{display:grid;gap:12px}.test-item{display:flex;align-items:center;justify-content:space-between}.actions{display:flex;gap:10px;align-items:center}.actions form{margin:0}.questions{display:grid;gap:16px}.question{background:#fff;border:1px solid var(--border);border-radius:8px;padding:18px}.question-head{display:flex;justify-content:space-between;gap:12px}.prompt{font-size:1.05rem;margin:10px 0 14px}.answers{display:grid;gap:8px}.answer{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--border);border-radius:8px;padding:10px;margin:0;font-weight:500}.answer input{width:auto;min-height:auto;margin-top:4px}.explanation{margin-top:12px;border-radius:8px;padding:12px;background:#f8fafc;border:1px solid var(--border)}.explanation.ok{border-color:#bbf7d0;background:#f0fdf4}.explanation.bad{border-color:#fecaca;background:#fff1f2}.sticky-actions{position:sticky;bottom:0;background:rgba(246,247,251,.94);border-top:1px solid var(--border);padding:14px;display:flex;gap:10px;justify-content:flex-end}table{width:100%;border-collapse:collapse;margin-top:12px}th,td{border-bottom:1px solid var(--border);padding:10px;text-align:left;vertical-align:top}.footer{max-width:1180px;margin:0 auto;padding:30px 28px;display:flex;gap:18px;color:var(--muted)}.footer a{color:var(--muted);text-decoration:none}.admin-nav{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px}.admin-nav a{padding:9px 12px;border:1px solid var(--border);border-radius:8px;background:#fff;text-decoration:none;color:#1f2937}.stat{font-weight:800;color:#475569}.stat strong{display:block;font-size:2rem;color:#0f172a}@media(max-width:800px){.topbar{height:auto;align-items:flex-start;padding:16px;gap:12px;flex-direction:column}nav{flex-wrap:wrap}.page-shell{padding:18px}.grid.two,.grid.three,.grid.four{grid-template-columns:1fr}.test-item,.page-title,.dashboard-head{align-items:flex-start;flex-direction:column}.actions{flex-wrap:wrap}.hero{min-height:320px}.footer{flex-direction:column}}
.trial-card{border-color:#93c5fd;background:#eff6ff}.trial-card p{margin:.25rem 0 .5rem;color:var(--muted)}.timer{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;padding:12px 14px;border:1px solid #bfdbfe;border-radius:8px;background:#eff6ff;color:#1e3a8a;font-weight:800}.q-diagram{margin:14px 0;max-width:520px}.q-diagram svg{width:100%;height:auto;background:#fff;border:1px solid var(--border);border-radius:8px}.q-diagram line:not([stroke]),.q-diagram path:not([stroke]){stroke:#111827;stroke-width:3;fill:none}.q-diagram text{font:700 22px Inter,Segoe UI,Arial,sans-serif;fill:#111827}.frac{display:inline-grid;grid-template-rows:auto auto;vertical-align:middle;text-align:center;line-height:1}.frac span:first-child{border-bottom:1px solid currentColor}.footer{display:grid;grid-template-columns:minmax(220px,1fr) 2fr;align-items:start}.footer-main,.footer-links{display:flex;gap:12px;flex-wrap:wrap}.footer-main{flex-direction:column;gap:4px}.footer-links{justify-content:flex-end}.cookie-consent{position:fixed;left:18px;right:18px;bottom:18px;z-index:80;display:flex;align-items:center;justify-content:space-between;gap:18px;max-width:980px;margin:0 auto;padding:16px;border:1px solid var(--border);border-radius:8px;background:#fff;box-shadow:0 18px 48px rgba(15,23,42,.18)}.cookie-consent p{margin:.25rem 0 0;color:var(--muted)}.cookie-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}@media(max-width:800px){.footer{grid-template-columns:1fr}.footer-links{justify-content:flex-start}.cookie-consent{flex-direction:column;align-items:flex-start}.cookie-actions{width:100%;justify-content:flex-start}}

.bot-field{position:absolute!important;left:-10000px!important;top:auto!important;width:1px!important;height:1px!important;overflow:hidden!important;opacity:0!important}

.test-meta{margin:.25rem 0 .5rem;color:var(--muted);font-weight:700}.answer-code{display:inline-flex;align-items:center;justify-content:center;min-width:2rem;height:2rem;border-radius:999px;background:#eef2ff;color:#1e3a8a;font-weight:900;flex:0 0 auto}.manual-notice{border-color:#bfdbfe;background:#eff6ff;color:#1e3a8a}.manual-answer-note{border:1px dashed var(--border);border-radius:8px;padding:12px;background:#f8fafc;color:#475569;font-weight:700}.q-diagram svg text{paint-order:stroke;stroke:#fff;stroke-width:4px;stroke-linejoin:round}.q-diagram svg text{fill:#111827}
.manual-solution{display:grid;gap:14px}.manual-solution h3,.manual-solution h4{margin:.25rem 0}.manual-total,.final-answer{font-weight:900}.solution-table-wrap{width:100%;overflow-x:auto}.solution-table{min-width:620px;margin:0}.solution-table th{background:#f1f5f9}.solution-table th,.solution-table td{border:1px solid var(--border);vertical-align:top}.solution-table th:last-child,.solution-table td:last-child{width:90px;text-align:center;font-weight:900}.solution-total td{background:#f8fafc;font-weight:900}.solution-steps{margin:0;padding-left:1.25rem;display:grid;gap:10px}.solution-steps li>div{margin-top:4px}.self-assessment-notice{border:1px solid #bfdbfe;border-radius:8px;background:#eff6ff;color:#1e3a8a;padding:12px}@media(max-width:800px){.solution-table{min-width:560px}.manual-solution{font-size:.96rem}}

.cookie-consent[hidden]{display:none!important}

.table-scroll{overflow-x:auto}.muted{color:var(--muted);font-size:.9rem}.admin-reports-table{min-width:1120px}.admin-reports-table th,.admin-reports-table td{vertical-align:top}.report-target{min-width:170px}.report-message{min-width:260px;white-space:pre-wrap}.report-files{min-width:170px}.report-file{display:grid;gap:6px;margin-bottom:10px}.report-file a{color:var(--blue);font-weight:700;text-decoration:none}.report-file small{color:var(--muted)}.report-thumb{display:block;width:120px;max-width:100%;height:auto;border:1px solid var(--border);border-radius:6px;background:#fff}@media(max-width:800px){.admin-reports-table{min-width:980px}.report-message{min-width:220px}.report-thumb{width:96px}}
.promo-banner{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:18px;padding:16px 18px;border:1px solid #fbbf24;border-radius:8px;background:#fffbeb;color:#78350f;box-shadow:var(--shadow)}.promo-banner p{margin:.2rem 0 0;color:#92400e}.promo-countdown{display:flex;align-items:center;gap:8px;white-space:nowrap;font-weight:800}.promo-countdown strong{display:inline-flex;align-items:center;justify-content:center;min-width:118px;padding:8px 10px;border-radius:8px;background:#fff;border:1px solid #fde68a;color:#92400e}@media(max-width:800px){.promo-banner{align-items:flex-start;flex-direction:column}.promo-countdown{white-space:normal}}
.part-answer-grid{display:grid;gap:12px}.part-answer-grid label{margin:0}.part-answer-grid textarea{min-height:76px}
.full-test-card{display:grid;gap:16px;margin-bottom:14px}.full-test-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}.full-test-head h3{margin:0 0 6px}.full-test-head p{margin:0;color:var(--muted)}.bonus-test-card{border-color:#fbbf24;background:#fffbeb}.module-list{display:grid;gap:10px}.module-row{display:grid;grid-template-columns:minmax(120px,1fr) auto auto;align-items:center;gap:12px;border:1px solid var(--border);border-radius:8px;background:#fff;padding:12px}.module-row strong{display:block}.module-row span{color:var(--muted);font-weight:700}.module-row .pill{color:#3730a3}.purchase-info{margin:14px 0}.purchase-info p{color:var(--muted)}@media(max-width:800px){.full-test-head{flex-direction:column}.module-row{grid-template-columns:1fr;align-items:flex-start}.module-row .actions{width:100%}.module-row .actions .btn,.module-row .actions form{width:100%}}
.answer.ok{border-color:#bbf7d0;background:#f0fdf4}.scale-answer-key{margin-top:18px}.scale-answer-key .question{box-shadow:none}