:root{--primary-color: #6366f1;--primary-hover: #4f46e5;--bg-color: #0f172a;--card-bg: #1e293b;--text-color: #f8fafc;--text-muted: #94a3b8;--border-color: #334155;--radius: 12px;--shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.5;-webkit-font-smoothing:antialiased}.app-container{min-height:100vh;display:flex;flex-direction:column;padding:2rem;max-width:1200px;margin:0 auto}.app-header{margin-bottom:3rem;text-align:center}.app-header h1{font-size:2.5rem;font-weight:800;background:linear-gradient(to right,#818cf8,#c084fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:.5rem}.main-content{display:grid;grid-template-columns:1fr;gap:2rem}@media(min-width:768px){.main-content{grid-template-columns:1fr 1.5fr}}.form-container,.list-container{background-color:var(--card-bg);padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border-color)}h2{font-size:1.5rem;margin-bottom:1.5rem;color:var(--text-color);border-bottom:2px solid var(--border-color);padding-bottom:.5rem}.input-group{margin-bottom:1.25rem}label{display:block;margin-bottom:.5rem;font-size:.875rem;font-weight:500;color:var(--text-muted)}input,textarea{width:100%;padding:.75rem;background-color:#0f172a;border:1px solid var(--border-color);border-radius:8px;color:var(--text-color);font-family:inherit;transition:border-color .2s,ring .2s}input:focus,textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #6366f133}textarea{min-height:100px;resize:vertical}button{width:100%;padding:.875rem;background-color:var(--primary-color);color:#fff;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:background-color .2s}button:hover{background-color:var(--primary-hover)}button:disabled{opacity:.7;cursor:not-allowed}.message{margin-bottom:1rem;padding:.75rem;border-radius:6px;font-size:.875rem}.message.success{background-color:#22c55e33;color:#4ade80;border:1px solid #22c55e}.message.error{background-color:#ef444433;color:#f87171;border:1px solid #ef4444}.customer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.customer-card{background-color:#0f172a;padding:1.25rem;border-radius:10px;border:1px solid var(--border-color);transition:transform .2s}.customer-card:hover{transform:translateY(-2px);border-color:var(--primary-color)}.customer-card h3{font-size:1.1rem;margin-bottom:.5rem;color:var(--text-color)}.customer-card p{font-size:.9rem;color:var(--text-muted);margin-bottom:.25rem;word-break:break-word}.customer-card strong{color:#cbd5e1}.loading{text-align:center;color:var(--text-muted);padding:2rem}