.embed-container{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;max-width:100%}.embed-container embed,.embed-container iframe,.embed-container object{position:absolute;top:0;left:0;width:100%;height:100%}h2{text-align:center;margin-bottom:30px;font-size:2em;color:#000}#progress-container{width:100%;height:12px;background:rgba(0,0,0,.3);border-radius:10px;margin-bottom:10px;overflow:hidden;border:2px solid #3498db}#progress-bar{height:100%;background:#fff;width:0%;transition:width .5s ease;border-radius:10px;box-shadow:0 0 10px rgba(0,198,255,.5)}#progress-text,#score-display{font-size:16px;margin-bottom:10px;font-weight:700;color:#000}#score-display{text-align:left}#quiz-box{background:rgba(255,255,255,.1);text-align:center}#question{font-size:1.5em;margin-bottom:25px;text-align:center;min-height:50px;display:flex;align-items:center;justify-content:center;color:#000;font-weight:600}#options{display:grid;gap:15px;margin-bottom:2px;margin:0 auto}#restart-btn{font-size:1.1em;display:grid;gap:15px;margin-bottom:2px;margin:0 auto}.option{background:#000;border:2px solid #000;color:#fff;padding:15px 20px;border-radius:10px;cursor:pointer;font-size:1.1em;font-weight:500;transition:all .3s ease;backdrop-filter:blur(10px);margin:3px}.option:hover:not(:disabled){background:#000;border-color:#2980b9;transform:translateY(-2px);box-shadow:0 5px 15px rgba(0,0,0,.3)}.option:disabled{cursor:not-allowed}.correct-glow{background:rgba(46,204,113,.9)!important;border-color:#2ecc71!important;box-shadow:0 0 20px rgba(46,204,113,.8);color:#000!important}.wrong-glow{background:rgba(231,76,60,.9)!important;border-color:#e74c3c!important;box-shadow:0 0 20px rgba(231,76,60,.8);color:#000!important}#timer{text-align:center;font-size:1.2em;font-weight:700;margin-bottom:15px;color:#000}#result{text-align:center;font-size:1.3em;margin:15px 0;font-weight:700;color:#000}#ai-explanation{background:rgba(255,255,255,.15);border-radius:10px;padding:15px;margin-top:15px;color:#000}#loading{text-align:center;font-size:1.2em;padding:20px;color:#000;font-weight:500}.debug-info{background:rgba(255,235,59,.2);border:2px solid #3498db;border-radius:5px;padding:10px;margin:10px 0;font-size:1.2em;color:#000;font-weight:500}@media (max-width:768px){body{padding:10px}.container{padding:20px}h2{font-size:1.5em}#question{font-size:1.2em}.option{font-size:1em;padding:12px 15px}}