:root{--primary:#007a5e;--primary-dark:#005a44;--bg:#faf9f6;--text:#1c1c1c;--error:#c0392b}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}.container{max-width:480px;margin:0 auto;padding:2rem 1.25rem}.card{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 1px 4px rgba(0,0,0,.08)}h1,h2{line-height:1.2}input,select{width:100%;padding:.65rem .75rem;border:1px solid #ddd;border-radius:8px;font-size:1rem;margin-bottom:.85rem}.btn,button{display:inline-block;background:var(--primary);color:#fff;border:none;padding:.7rem 1.2rem;border-radius:8px;font-size:1rem;cursor:pointer;text-decoration:none;text-align:center}.btn:hover,button:hover{background:var(--primary-dark)}button:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:transparent;color:var(--primary);border:1px solid var(--primary)}.error{color:var(--error);font-size:.9rem;margin-bottom:.75rem}nav.topbar{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;background:#fff;border-bottom:1px solid #eee}nav.topbar a{color:var(--text);text-decoration:none;margin-left:1rem}.quiz-image{width:100%;max-width:320px;aspect-ratio:1;object-fit:cover;border-radius:12px;margin:0 auto 1.5rem;display:block;background:#eee}table{width:100%;border-collapse:collapse}td,th{text-align:left;padding:.5rem;border-bottom:1px solid #eee;font-size:.9rem}