:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}body{margin:0;font-family:Poppins,sans-serif;background:linear-gradient(135deg,#ffdee9,#b5fffc);min-height:150vh;color:#333;display:flex;justify-content:center;align-items:center}#root{text-align:center;width:100%;padding:2rem;box-sizing:border-box}.slogan{font-size:1.2rem;color:#ff4081;margin-bottom:6px;font-weight:700;text-shadow:0 2px 4px rgba(0,0,0,.1);animation:fadeIn .8s ease-in-out}h1{font-size:3.5rem;color:#ff4081;text-shadow:0 4px 6px rgba(0,0,0,.2);animation:fadeIn .8s ease-in-out}p{font-size:1.2rem;color:#555;margin-bottom:1.5rem;animation:fadeIn 1.5s ease-in-out}input{padding:12px;width:300px;border-radius:8px;border:1px solid #ccc;font-size:1rem;outline:none;box-shadow:0 4px 8px #0000001a;transition:box-shadow .2s ease,transform .15s ease}input:focus{box-shadow:0 6px 12px #0003;transform:scale(1.03)}button{padding:12px 25px;border-radius:8px;border:none;background:linear-gradient(135deg,#ff4081,#ff6f91);color:#fff;font-size:1rem;font-weight:700;cursor:pointer;transition:transform .25s ease,box-shadow .25s ease,background .25s ease}button:hover{transform:scale(1.07);box-shadow:0 6px 15px #ff408180}button:disabled{background:#ccc;cursor:not-allowed}.card{background-color:#fff;border-radius:15px;padding:20px;box-shadow:0 4px 20px #0000001a;margin:2rem auto;max-width:800px;animation:fadeInUp .6s ease-out;position:relative;transition:transform .2s ease,box-shadow .2s ease}.card.lesson{animation:slideInLeft .7s ease-in-out}.card.quiz{animation:slideInRight .7s ease-in-out}.card:hover{transform:translateY(-5px);box-shadow:0 6px 25px #00000026}.card h2{font-size:2rem;margin-bottom:1rem;color:#ff4081;border-bottom:3px solid #ff4081;padding-bottom:5px}.card p{line-height:1.6;font-size:1.1rem;color:#333}.quiz-item{margin-bottom:20px;animation:fadeInUp .6s ease-out}.quiz-item p{font-size:1.2rem;font-weight:700;margin-bottom:10px}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.option-button{padding:12px;border-radius:8px;font-size:1rem;font-weight:700;border:1px solid #ccc;background-color:#f9f9f9;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,background-color .2s ease}.option-button:hover{background-color:#eef7ff;transform:scale(1.04);box-shadow:0 4px 10px #0000001a}.option-button:disabled{cursor:not-allowed}.option-button.correct{background-color:#cffbd6;color:#155724;border:none}.option-button.wrong{background-color:#ffd3d3;color:#842029;border:none}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-100%)}to{opacity:1;transform:translate(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(100%)}to{opacity:1;transform:translate(0)}}@media (max-width: 768px){input,button{width:90%}.options-grid{grid-template-columns:1fr}.card{padding:15px}h1{font-size:2.5rem}}