:root{font-family:Inter,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}[data-theme=light]{--primary-color: #ec4899;--accent-color: #38bdf8;--background-color: #fef3c7;--text-color: #78350f;--surface-color: #ffffff;--correct-color: #22c55e;--incorrect-color: #ef4444;--shadow-color: rgba(120, 53, 15, .1)}[data-theme=dark]{--primary-color: #ec4899;--accent-color: #38bdf8;--background-color: #1e293b;--text-color: #f1f5f9;--surface-color: #334155;--correct-color: #4ade80;--incorrect-color: #f87171;--shadow-color: rgba(0, 0, 0, .2)}body{margin:0;display:flex;place-items:center;justify-content:center;min-width:320px;min-height:100vh;background-color:var(--background-color);color:var(--text-color);transition:background-color .3s ease,color .3s ease}#app{max-width:1280px;margin:0 auto;padding:2rem;text-align:center;width:100%}.quiz-wrapper{max-width:520px;margin:2rem auto;padding:2.5rem;background-color:var(--surface-color);border-radius:24px;box-shadow:0 8px 16px var(--shadow-color);position:relative;overflow:hidden;transition:background-color .3s ease}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.quiz-header h1,.quiz-header h2{font-size:1.5rem;font-weight:700;color:var(--primary-color);margin:0;text-align:center;flex-grow:1}.back-button{background:none;border:none;font-size:1.5rem;color:var(--text-color);cursor:pointer;padding:0 1rem 0 0}.lives-container{font-size:1.2rem;font-weight:700}.heart{color:var(--primary-color);margin-left:.25rem;animation:heartbeat 1.5s infinite}@keyframes heartbeat{0%,to{transform:scale(1)}50%{transform:scale(1.2)}}.progress-bar-container{width:100%;height:16px;background-color:var(--background-color);border-radius:16px;margin-bottom:2.5rem;overflow:hidden}.progress-bar{height:100%;background-color:var(--accent-color);border-radius:16px;transition:width .4s ease-in-out}.question-text{font-size:1.4rem;font-weight:600;margin-bottom:2.5rem;min-height:50px}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;width:100%}.option-button,.correct,.incorrect,.correct-unselected{padding:1rem;font-size:1.1rem;font-weight:600;border-radius:16px;border:2px solid var(--background-color);background-color:var(--surface-color);color:var(--text-color);cursor:pointer;box-shadow:0 4px 8px var(--shadow-color);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;min-height:70px;display:flex;align-items:center;justify-content:center}.option-button:hover:not(:disabled){transform:scale(1.05);box-shadow:0 6px 12px var(--shadow-color);border-color:var(--accent-color)}.correct,.correct:hover{background-color:var(--correct-color);color:#fff;border-color:var(--correct-color);transform:scale(1.05)}.incorrect,.incorrect:hover{background-color:var(--incorrect-color);color:#fff;border-color:var(--incorrect-color);transform:scale(1.05)}.correct-unselected{background-color:var(--surface-color);border-color:var(--correct-color);opacity:.8}.option-button:disabled{cursor:not-allowed}.results-container h2{font-size:2rem;font-weight:700;color:var(--primary-color)}.results-container .score{font-size:2.5rem;font-weight:800;margin:1rem 0}.results-container button{margin-top:2rem;padding:1rem 2rem;font-size:1.2rem;font-weight:700;border-radius:16px;border:none;background-color:var(--primary-color);color:#fff;cursor:pointer;box-shadow:0 4px 8px var(--shadow-color);transition:transform .2s ease,box-shadow .2s ease}.results-container button:hover{transform:scale(1.05);box-shadow:0 6px 12px var(--shadow-color)}.modal-overlay{position:absolute;inset:0;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.feedback-modal{padding:2rem 4rem;border-radius:24px;color:#fff;text-align:center;font-weight:700}.feedback-modal.correct{background-color:var(--correct-color)}.feedback-modal.incorrect{background-color:var(--incorrect-color)}.feedback-modal h2{margin:0;font-size:1.8rem}.theme-switcher{position:fixed;top:1rem;right:1rem;padding:.5rem;background-color:var(--surface-color);border:2px solid var(--background-color);border-radius:12px;cursor:pointer;font-size:1.5rem;line-height:1;z-index:2000;box-shadow:0 2px 4px var(--shadow-color);transition:transform .2s ease}.theme-switcher:hover{transform:scale(1.1)}.dashboard{width:100%;max-width:800px}.dashboard-title{font-size:2.5rem;font-weight:800;color:var(--primary-color);margin-bottom:2rem}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem}.quiz-card{background-color:var(--surface-color);border-radius:24px;padding:1.5rem;box-shadow:0 8px 16px var(--shadow-color);cursor:pointer;transition:transform .2s ease,box-shadow .2s ease;position:relative;border:2px solid transparent}.quiz-card:hover{transform:translateY(-5px);box-shadow:0 12px 24px var(--shadow-color);border-color:var(--accent-color)}.quiz-card.locked{background-color:var(--background-color);cursor:not-allowed;opacity:.7}.quiz-card.locked:hover{transform:none;box-shadow:0 8px 16px var(--shadow-color);border-color:transparent}.quiz-card-level{font-size:.9rem;font-weight:700;color:var(--accent-color);margin-bottom:.5rem}.quiz-card-title{font-size:1.3rem;font-weight:700;margin:0}.lock-icon{position:absolute;top:1.5rem;right:1.5rem;font-size:1.5rem;opacity:.5}.achievement-icon{position:absolute;top:1.5rem;right:1.5rem;font-size:1.8rem;animation:bounce .8s cubic-bezier(.25,.46,.45,.94) both}@keyframes bounce{0%{transform:translateY(-50px);animation-timing-function:ease-in;opacity:0}38%{transform:translateY(0);animation-timing-function:ease-out;opacity:1}55%{transform:translateY(-25px);animation-timing-function:ease-in}72%{transform:translateY(0);animation-timing-function:ease-out}81%{transform:translateY(-10px);animation-timing-function:ease-in}90%{transform:translateY(0);animation-timing-function:ease-out}95%{transform:translateY(-4px);animation-timing-function:ease-in}to{transform:translateY(0);animation-timing-function:ease-out}}