body{font-family:Arial,sans-serif;background:#f9f9f9;padding:2rem;margin:0}.container{max-width:700px;margin:0 auto;background:#fff;border-radius:12px;padding:2rem;box-shadow:0 5px 15px #0000001a}.title{font-size:1.5rem;margin-bottom:.5rem}.score{font-size:1.1rem}.progress{margin-bottom:1rem}.choice-btn{background:#07c;color:#fff;border:none;padding:.75rem 1rem;border-radius:8px;cursor:pointer;margin-top:.5rem;width:100%;text-align:left;font-size:1rem}.choice-btn:hover{background:#005fa3}select{padding:.5rem;margin-left:.5rem}.toolbar{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.flashcard{margin-top:1.5rem}