:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark;color:#ffffffde;background-color:#0d1117;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;background:radial-gradient(circle at top right,#1a1f2e,#0d1117)}#root{max-width:1280px;margin:0 auto;padding:2rem;text-align:center;width:100%}.glass-card{background:#ffffff0d;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);border-radius:20px;padding:2.5rem;box-shadow:0 8px 32px #0000005e;transition:transform .3s ease,box-shadow .3s ease}.glass-card:hover{transform:translateY(-5px);box-shadow:0 12px 40px #00000080;border:1px solid rgba(255,255,255,.2)}h1{font-size:3.2em;line-height:1.1;background:linear-gradient(45deg,#00d2ff,#3a7bd5);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:1.5rem}button{border-radius:12px;border:1px solid transparent;padding:.8em 1.5em;font-size:1em;font-weight:600;font-family:inherit;background-color:#1a73e8;color:#fff;cursor:pointer;transition:all .25s;margin:.5rem}button:hover{background-color:#1557b0;transform:scale(1.02)}button:active{transform:scale(.98)}.option-button{width:100%;text-align:left;background:#ffffff08;border:1px solid rgba(255,255,255,.1)}.option-button:hover{background:#ffffff14}.option-button.selected{border-color:#00d2ff;background:#00d2ff1a}.quiz-container{display:flex;flex-direction:column;gap:1.5rem;max-width:600px;margin:0 auto}.progress-bar{width:100%;height:8px;background:#ffffff1a;border-radius:4px;overflow:hidden;margin-bottom:1rem}.progress-inner{height:100%;background:linear-gradient(90deg,#00d2ff,#3a7bd5);transition:width .3s ease}