:root{--primary-color: #FF6B6B;--secondary-color: #4ECDC4;--accent-color: #FFE66D;--background-color: #f7f9fc;--text-color: #2C3E50}body{margin:0;display:flex;justify-content:center;align-items:center;min-height:100vh;font-family:Comic Neue,cursive;background:var(--background-color);background-image:radial-gradient(circle at 10% 20%,rgba(255,107,107,.1) 0%,transparent 20%),radial-gradient(circle at 90% 80%,rgba(78,205,196,.1) 0%,transparent 20%)}.quiz-container{background:white;padding:2.5rem;border-radius:20px;box-shadow:0 8px 30px #0000001a;text-align:center;min-width:350px;max-width:600px;width:90%;border:3px solid var(--primary-color)}.quiz-header{display:flex;justify-content:space-between;margin-bottom:1rem}.question{font-size:2.5rem;margin:2rem 0;color:var(--text-color);font-weight:700}.options{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;margin:1rem 0}.option-button{font-family:Comic Neue,cursive;font-size:1.3rem;padding:1rem 1.5rem;background-color:var(--secondary-color);color:#fff;border:none;border-radius:15px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 0 darken(#4ECDC4,10%);width:100%}.option-button:hover{transform:translateY(-2px);box-shadow:0 6px 0 darken(#4ECDC4,10%)}.option-button:active{transform:translateY(2px);box-shadow:0 2px 0 darken(#4ECDC4,10%)}.timer{font-size:1.5rem;color:var(--primary-color);font-weight:700;background:rgba(255,107,107,.1);padding:.5rem 1rem;border-radius:10px;display:inline-block}.score{font-size:1.4rem;color:var(--secondary-color);font-weight:700}.results{text-align:center;animation:fadeIn .5s ease}.results h2{color:var(--primary-color);font-size:2.5rem;margin-bottom:1.5rem}.results-details{background:rgba(78,205,196,.1);padding:1.5rem;border-radius:15px;margin:2rem 0}.results-details p{font-size:1.3rem;margin:.7rem 0;color:var(--text-color)}.start-screen{text-align:center}.instructions{background:rgba(78,205,196,.1);padding:1.5rem;border-radius:15px;margin:2rem 0}.instructions p{color:var(--text-color);font-size:1.2rem;margin:.5rem 0}.start-button,.restart-button{font-family:Comic Neue,cursive;font-size:1.5rem;padding:1rem 2rem;background-color:var(--primary-color);color:#fff;border:none;border-radius:15px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 0 darken(#FF6B6B,10%);margin:1rem 0}.start-button:hover,.restart-button:hover{transform:translateY(-2px);box-shadow:0 6px 0 darken(#FF6B6B,10%)}.start-button:active,.restart-button:active{transform:translateY(2px);box-shadow:0 2px 0 darken(#FF6B6B,10%)}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 480px){.quiz-container{padding:1.5rem;min-width:auto}.question{font-size:2rem}.option-button{font-size:1.1rem;padding:.8rem 1.2rem}}.results-actions{display:flex;flex-direction:column;gap:.8rem;margin-top:2rem}.results-actions button{width:100%;min-height:3.5rem;display:flex;align-items:center;justify-content:center}.review-button{font-family:Comic Neue,cursive;font-size:1.5rem;padding:1rem 2rem;background-color:var(--secondary-color);color:#fff;border:none;border-radius:15px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 0 darken(#4ECDC4,10%)}.review-button:hover{transform:translateY(-2px);box-shadow:0 6px 0 darken(#4ECDC4,10%)}.back-button{font-family:Comic Neue,cursive;font-size:1.2rem;padding:.8rem 1.5rem;background-color:var(--text-color);color:#fff;border:none;border-radius:15px;cursor:pointer;transition:all .3s ease;margin-top:2rem}.review-section{animation:fadeIn .5s ease}.wrong-answers-list{display:flex;flex-direction:column;gap:2rem;margin:2rem 0}.review-item{background:rgba(78,205,196,.1);padding:1.5rem;border-radius:15px;text-align:left}.review-question{font-size:1.8rem;font-weight:700;color:var(--text-color);margin:1rem 0}.review-answer{font-size:1.2rem;margin:.5rem 0}.review-answer.wrong{color:var(--primary-color)}.review-answer.correct{color:var(--secondary-color)}.quiz-footer{display:flex;justify-content:space-between;align-items:center;margin-top:2rem}.start-over-button{font-family:Comic Neue,cursive;font-size:1.5rem;padding:1rem 2rem;background-color:var(--text-color);color:#fff;border:none;border-radius:15px;cursor:pointer;transition:all .3s ease;opacity:.8;box-shadow:0 4px #0003}.start-over-button:hover{opacity:1;transform:translateY(-2px);box-shadow:0 6px #0003}.start-over-button:active{transform:translateY(2px);box-shadow:0 2px #0003}.number-range{color:var(--primary-color);font-weight:700;font-size:1.1rem;margin-top:1rem;padding:.5rem;background:rgba(255,107,107,.1);border-radius:10px}.language-selector{position:absolute;top:1rem;right:1rem;display:flex;gap:.5rem}.lang-button{font-family:Comic Neue,cursive;font-size:1rem;padding:.5rem 1rem;border:2px solid var(--primary-color);border-radius:8px;background:white;color:var(--primary-color);cursor:pointer;transition:all .3s ease}.lang-button.active{background:var(--primary-color);color:#fff}.lang-button:hover{transform:translateY(-2px);box-shadow:0 2px 4px #0000001a}