:root{--bg-color:#f8fafc;--text-primary:#334155;--text-secondary:#64748b;--accent-primary:#d00;--accent-secondary:#ffce00;--card-bg:#ffffffd9;--card-border:#0000000d;--success:#10b981;--error:#ef4444;--warning:#f59e0b}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);background-image:radial-gradient(circle at 15%,#3b82f614,#0000 25%),radial-gradient(circle at 85% 30%,#10b98114,#0000 25%);flex-direction:column;min-height:100vh;font-family:Inter,sans-serif;display:flex;overflow-x:hidden}#root{flex-direction:column;flex:1;display:flex}h1,h2,h3,h4{margin-bottom:1rem;font-weight:700;line-height:1.2}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}p{color:var(--text-secondary);line-height:1.5}.glass-card{background:var(--card-bg);-webkit-backdrop-filter:blur(16px);border:1px solid var(--card-border);border-radius:1.5rem;padding:2.5rem;transition:transform .3s,box-shadow .3s;box-shadow:0 10px 40px -10px #00000014,0 4px 10px -5px #0000000a}.glass-card:hover{transform:translateY(-2px);box-shadow:0 20px 40px -10px #0000001f,0 8px 10px -5px #0000000f}.btn{cursor:pointer;border:none;border-radius:1rem;outline:none;justify-content:center;align-items:center;padding:.875rem 1.5rem;font-family:inherit;font-size:1rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{color:#fff;text-shadow:1px 1px 2px #000c;background:linear-gradient(135deg,#111 0%,#d00 50%,#ffce00 100%);box-shadow:0 4px 10px -2px #d006}.btn-primary:hover{opacity:.95;transform:translateY(-2px);box-shadow:0 6px 15px -2px #dd000080}.btn-primary:active{transform:translateY(0)}.btn-secondary{color:var(--text-primary);border:1px solid var(--card-border);background:#0000000a}.btn-secondary:hover{background:#00000014}.btn-gradient-outline{color:#334155;background:#fff;border:1px solid #d003;font-weight:600;box-shadow:0 2px 8px -2px #dd000026}.btn-gradient-outline:hover{background:linear-gradient(135deg,#11111105 0%,#dd000005 50%,#ffce0005 100%);border-color:#d006;transform:translateY(-2px);box-shadow:0 6px 15px -2px #dd000040}.btn-gradient-outline span{background:linear-gradient(135deg,#111 0%,#d00 50%,#e6a800 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.btn-success{background:var(--success);color:#fff}.btn-error{background:var(--error);color:#fff}.btn-disabled{opacity:.5;cursor:not-allowed}.input-group{margin-bottom:1.5rem}.input-label{color:var(--text-secondary);margin-bottom:.5rem;font-size:.875rem;font-weight:600;display:block}.input-field{width:100%;color:var(--text-primary);background:#ffffff80;border:1px solid #0000001a;border-radius:1rem;padding:.875rem 1.25rem;font-family:inherit;font-size:1rem;transition:all .2s}.input-field:focus{border-color:var(--accent-secondary);background:#fff;outline:none;box-shadow:0 0 0 4px #ffce004d}@keyframes fadeIn{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.5s ease-out forwards fadeIn}@keyframes pulse{0%,to{opacity:1}50%{opacity:.6}}.animate-pulse{animation:2s cubic-bezier(.4,0,.6,1) infinite pulse}.text-center{text-align:center}.text-gradient{background:linear-gradient(135deg,#111 0%,#d00 50%,#ffce00 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.mt-4{margin-top:1rem}.mt-8{margin-top:2rem}.mb-4{margin-bottom:1rem}.mb-8{margin-bottom:2rem}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-4{gap:1rem}.gap-8{gap:2rem}.w-full{width:100%}.max-w-md{max-width:28rem}.max-w-4xl{max-width:56rem}.max-w-6xl{max-width:72rem}.mx-auto{margin-left:auto;margin-right:auto}.p-4{padding:1rem}.p-8{padding:2rem}.options-container{flex-direction:column;gap:1.25rem;width:100%;max-width:40rem;margin:1.5rem auto 0;display:flex}.option-btn{border:2px solid var(--card-border);text-align:left;color:var(--text-primary);cursor:pointer;background:#fff;border-radius:1rem;padding:1.25rem 1.5rem 1.25rem 2.5rem;font-size:1.125rem;font-weight:600;transition:all .3s;position:relative;overflow:hidden;box-shadow:0 4px 6px -1px #0000000d}.option-btn:hover:not(:disabled){border-color:#0000;transform:translateY(-2px);box-shadow:0 10px 15px -3px #0000001a}.option-btn:before{content:"";background:linear-gradient(#000 0%,#d00 50%,#ffce00 100%);border-top-left-radius:.8rem;border-bottom-left-radius:.8rem;width:8px;position:absolute;top:0;bottom:0;left:0}.option-btn:after{content:"";opacity:0;pointer-events:none;background:linear-gradient(90deg,#00000008 0%,#dd000008 50%,#ffce0008 100%);transition:opacity .3s;position:absolute;inset:0}.option-btn:hover:not(:disabled):after{opacity:1}.option-btn:disabled{opacity:.6;cursor:default;background:#f8fafc}.option-btn.correct{color:#065f46;background:#d1fae5;border-color:#10b981}.option-btn.wrong{color:#991b1b;opacity:.4;background:#fee2e2;border-color:#ef4444}.option-letter{width:2rem;color:var(--text-secondary);text-transform:uppercase;font-weight:700;display:inline-block}