*{box-sizing:border-box}:root{--bg:#fdfbf7;--bg-card:#fff;--text:#2b2b2b;--text-soft:#6b6b6b;--primary:#4a90d9;--primary-text:#fff;--success:#2e9e4f;--danger:#d94a4a;--border:#e5e0d8;--shadow:0 2px 8px #2b2b2b14}body,button,header,main,section{transition:background-color .3s,color .3s,border-color .3s}body{background:var(--bg);color:var(--text);flex-direction:column;align-items:center;min-height:100vh;margin:0;padding:1rem;font-family:Segoe UI,system-ui,-apple-system,sans-serif;display:flex}header{justify-content:flex-end;align-items:center;gap:.5rem;width:100%;max-width:640px;margin-bottom:1rem;display:flex}main,section{width:100%;max-width:640px}#quiz-list{flex-direction:column;gap:.75rem;display:flex}button{background:var(--primary);color:var(--primary-text);cursor:pointer;box-shadow:var(--shadow);border:1px solid #0000;border-radius:12px;padding:.65rem 1.1rem;font-family:inherit;font-size:1rem;transition:transform .1s,background-color .2s}button:hover:not(:disabled){transform:translateY(-1px)}button:active:not(:disabled){transform:translateY(0)}button:disabled{opacity:.45;cursor:not-allowed}#btn-next,#btn-go{min-width:10rem}#answers{flex-direction:column;gap:.75rem;margin:1.25rem 0;display:flex}#answers button{text-align:left;padding:.85rem 1.1rem;font-size:1.05rem}#answers button.correct{background:var(--success);color:#fff}#answers button.wrong{background:var(--danger);color:#fff}#progress{color:var(--text-soft);letter-spacing:.03em;font-size:.95rem}#question-text{background:var(--bg-card);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:16px;padding:1.25rem;font-size:1.35rem;line-height:1.45}#feedback{min-height:1.5rem;font-size:1rem}#btn-next{margin-top:.5rem}#result-screen h2{background:var(--bg-card);text-align:center;border:1px solid var(--border);box-shadow:var(--shadow);border-radius:16px;padding:1.5rem;font-size:1.5rem}.ad-slot{border:1px dashed var(--border);min-height:60px;color:var(--text-soft);border-radius:12px;justify-content:center;align-items:center;margin:1rem 0;padding:.5rem;font-size:.85rem;display:flex}.ad-slot img{border-radius:8px;max-width:100%}#theme-select{border:1px solid var(--border);background:var(--bg-card);color:var(--text);border-radius:10px;padding:.45rem .75rem;font-family:inherit;font-size:.95rem}.theme-icon{vertical-align:middle;width:28px;height:28px}@media (width<=480px){body{padding:.5rem}#question-text{font-size:1.15rem}header{justify-content:space-between}}#quiz-title{opacity:.75;margin-bottom:.25rem;font-size:1rem;font-weight:600}#question-text{margin-top:.5rem}