:root{--primary:#4f46e5;--primary-hover:#4338ca;--bg-main:#f8fafc;--bg-card:#fff;--text-main:#1e293b;--text-muted:#64748b;--border:#e2e8f0;--success:#10b981;--error:#ef4444;--warning:#f59e0b;--shadow:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-main);color:var(--text-main);-webkit-font-smoothing:antialiased;font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.5}.container{max-width:800px;margin:0 auto;padding:2rem 1rem}.card{background:var(--bg-card);box-shadow:var(--shadow);border:1px solid var(--border);border-radius:1rem;margin-bottom:2rem;padding:2rem}.btn{cursor:pointer;border:none;border-radius:.5rem;justify-content:center;align-items:center;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-1px)}.title{color:#0f172a;letter-spacing:-.025em;margin-bottom:.5rem;font-size:2rem;font-weight:800}.subtitle{color:var(--text-muted);margin-bottom:2rem}.fade-in{animation:.5s ease-out fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.option-card{border:2px solid var(--border);cursor:pointer;border-radius:.75rem;align-items:center;gap:1rem;margin-bottom:1rem;padding:1rem;transition:all .2s;display:flex}.option-card:hover{border-color:var(--primary);background-color:#f5f3ff}.option-card.selected{border-color:var(--primary);background-color:#eef2ff}.option-letter{background-color:var(--border);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:2rem;height:2rem;font-weight:700;display:flex}.selected .option-letter{background-color:var(--primary);color:#fff}