*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#0f172a;color:#e2e8f0;min-height:100vh}#root{min-height:100vh}a{color:#38bdf8;text-decoration:none}a:hover{text-decoration:underline}input,button{font:inherit}.container{max-width:960px;margin:0 auto;padding:1rem}.card{background:#1e293b;border-radius:8px;padding:1.25rem;margin-bottom:1rem;border:1px solid #334155}.btn{padding:.5rem 1rem;border-radius:6px;border:none;cursor:pointer;font-weight:500}.btn-primary{background:#3b82f6;color:#fff}.btn-primary:hover{background:#2563eb}.btn-danger{background:#dc2626;color:#fff}.btn-danger:hover{background:#b91c1c}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.25rem;color:#94a3b8;font-size:.875rem}.form-group input{width:100%;padding:.5rem .75rem;border:1px solid #475569;border-radius:6px;background:#0f172a;color:#e2e8f0}.form-group input:focus{outline:none;border-color:#3b82f6}.grid{display:grid;gap:1rem}@media(min-width:640px){.grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}}.positive{color:#22c55e}.negative{color:#ef4444}