:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark;color:#ffffffde;background-color:#1a1a1a;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{width:100%;min-height:100vh;margin:0;padding:0;overflow-x:hidden;overflow-y:auto}a{font-weight:500;color:#667eea;text-decoration:inherit}a:hover{color:#764ba2}body{margin:0;padding:0;min-width:320px;width:100%;min-height:100vh;overflow-x:hidden;overflow-y:auto}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,transform .15s ease,box-shadow .15s ease}button:hover{border-color:#646cff}button:active,button:active:focus,button:active:focus-visible{transform:translateY(2px);box-shadow:none}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}}.landing-container{position:relative;min-height:100vh;background:#1a1a1a;padding:40px 20px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.landing-header{text-align:center;margin-bottom:60px;padding:40px 20px}.landing-title{font-size:4rem;margin-bottom:16px;color:#fff;font-weight:900;letter-spacing:-2px;text-transform:uppercase}.landing-subtitle{font-size:1.2rem;color:#888;font-weight:400;text-transform:uppercase;letter-spacing:2px}.category-buttons{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;max-width:900px;margin:0 auto}.category-btn{background:#fff;border:3px solid 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768px){.quiz-container{padding:1rem}.quiz-container h1{font-size:2rem}.question-container{padding:1.5rem}.question{font-size:1.2rem}.navigation{flex-direction:column}.nav-btn{width:100%}}@media (max-width: 480px){.quiz-container{padding:.5rem;min-width:320px}.question-container{padding:1rem .5rem;min-width:300px}.options{flex-direction:column;gap:1rem}.option-btn{min-width:200px;width:100%}.quiz-container h1{font-size:1.5rem}.question{font-size:1.1rem}}.fairness-label{font-size:.9rem;color:#666;margin-bottom:.5rem;text-transform:uppercase;letter-spacing:1px}.fairness-type{font-size:2.5rem;color:#667eea;margin:.5rem 0 1rem;font-weight:700}.chart-container{margin:2rem 0;padding:1rem}.pomodoro-content{padding:2rem;text-align:center}.pomodoro-title{font-size:2rem;color:#000;margin-bottom:1rem;font-weight:700;text-transform:uppercase;letter-spacing:-.5px}.pomodoro-description{font-size:1.1rem;color:#444;line-height:1.6;margin:0}.pomodoro-page{padding:40px 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