:root{--primary-color:#4285F4;--success-color:#34A853;--error-color:#EA4335;--warning-color:#FBBC05;--dark-color:#202124;--light-color:#f8f9fa;--gray-color:#dadce0;--progress-bar-color:#6e8efb;--streak-color:#FF6D00;--timer-color:#6e8efb;--timer-warning:#ff9966;--timer-critical:#ff2400}*{margin:0;padding:0;box-sizing:border-box;font-family:'Nunito Sans',sans-serif}body{background-color:#fff;color:#333;line-height:1.6}.header{position:fixed;top:0;left:0;width:100%;background-color:#fff;box-shadow:0 2px 10px rgb(0 0 0 / .1);z-index:1000;margin:0;padding:0}.header-content{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;border-bottom:1px solid var(--gray-color);max-width:1200px;margin:0 auto;width:100%;box-sizing:border-box}.header-bottom,.streak-counter,.question-text,.instructions{background-color:white!important}main{margin-top:50px;background-color:#fff;padding:20px;min-height:calc(100vh - 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67 53 / .3)}.multiple-selection .correct-marker{position:absolute;right:15px;color:var(--success-color);font-weight:700;font-size:1.2rem}.multiple-selection .incorrect-marker{position:absolute;right:15px;color:var(--error-color);font-weight:700;font-size:1.2rem}.selection-hint{text-align:center;color:#6c757d;font-size:.9rem;margin-top:-15px;margin-bottom:20px}@media (max-width:1024px){.multiple-selection{grid-template-columns:repeat(3,1fr)}}@media (max-width:768px){.multiple-selection{grid-template-columns:repeat(2,1fr)}}@media (max-width:480px){.multiple-selection{grid-template-columns:repeat(2,1fr)}.multiple-selection .option{min-height:60px;padding:12px 10px;font-size:.9rem}}.multiple-selection .option-content{width:100%;text-align:center;padding:5px}.sequence-container{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:0 auto 30px;max-width:800px;padding:0 15px}.sequence-slot{min-width:80px;min-height:80px;padding:10px;border:3px dashed 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