body{color:#fff;background:#0a0a0a;min-height:100vh;margin:0}#root{min-height:100vh}:root{--bg-primary:#0a0a0a;--bg-secondary:#1a1a1a;--bg-card:#222;--text-primary:#fff;--text-secondary:#999;--accent-cyan:#00d9ff;--accent-red:#f44;--border-color:#333}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-primary);color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6}.dashboard{max-width:1400px;margin:0 auto;padding:2rem}header{border-bottom:1px solid var(--border-color);margin-bottom:2rem;padding-bottom:1rem}header h1{margin-bottom:.5rem;font-size:2rem}.account-info{color:var(--text-secondary);gap:2rem;font-size:.9rem;display:flex}.controls{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin-bottom:2rem;padding:1.5rem;display:grid}.control-group{flex-direction:column;display:flex}.control-group label{color:var(--text-secondary);margin-bottom:.5rem;font-size:.9rem}.control-group input[type=range]{background:var(--border-color);border-radius:3px;outline:none;width:100%;height:6px;margin-top:.5rem}.control-group input[type=range]::-webkit-slider-thumb{appearance:none;background:var(--accent-cyan);cursor:pointer;border-radius:50%;width:16px;height:16px}.control-group input[type=range]::-moz-range-thumb{background:var(--accent-cyan);cursor:pointer;border:none;border-radius:50%;width:16px;height:16px}.comparison{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin-bottom:2rem;display:grid}.strategy-card,.savings-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:8px;padding:1.5rem}.cc-strategy{border-left:3px solid var(--accent-cyan)}.normal-strategy{border-left:3px solid #666}.savings-card{border-left:3px solid #4ade80}.strategy-card h2,.savings-card h2{color:var(--text-secondary);margin-bottom:1rem;font-size:1.1rem}.stat{margin-bottom:.75rem}.stat-label{color:var(--text-secondary);margin-bottom:.25rem;font-size:.85rem}.stat-value{font-size:1.5rem;font-weight:600}.chart-container{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;margin-bottom:2rem;padding:1.5rem}.chart-container h2{color:var(--text-secondary);margin-bottom:1rem;font-size:1.3rem}.assumptions{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;padding:1.5rem}.assumptions h3{color:var(--accent-cyan);margin-top:1.5rem;margin-bottom:.75rem;font-size:1.1rem}.assumptions h3:first-child{margin-top:0}.assumptions ul{padding-left:0;list-style:none}.assumptions li{color:var(--text-secondary);border-bottom:1px solid #2a2a2a;padding:.4rem 0;font-size:.9rem}.assumptions li:last-child{border-bottom:none}@media (width<=768px){.dashboard{padding:1rem}.account-info{flex-direction:column;gap:.5rem}.controls,.comparison{grid-template-columns:1fr}}