:root {
     --primary: #6366f1;
     --primary-hover: #4f46e5;
     --secondary: #64748b;
     --bg-main: #f8fafc;
     --bg-card: #ffffff;
     --text-main: #1e293b;
     --text-muted: #64748b;
     --border: #e2e8f0;
     --success: #10b981;
     --danger: #ef4444;
     --warning: #f59e0b;
     --radius: 12px;
     --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
     --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
 }

 * {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
 }

 body {
     font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
     background-color: var(--bg-main);
     color: var(--text-main);
     line-height: 1.5;
     -webkit-font-smoothing: antialiased;
 }

 /* Layout */
 .container {
     max-width: 1200px;
     margin: 0 auto;
     padding: 2rem;
 }

 .glass-card {
     background: rgba(255, 255, 255, 0.8);
     backdrop-filter: blur(10px);
     border: 1px solid rgba(255, 255, 255, 0.3);
     border-radius: var(--radius);
     padding: 2rem;
     box-shadow: var(--shadow);
 }

 /* Typography */
 h1,
 h2,
 h3 {
     font-weight: 700;
     margin-bottom: 1rem;
 }

 /* Buttons */
 .btn {
     display: inline-flex;
     align-items: center;
     justify-content: center;
     padding: 0.5rem 1rem;
     border-radius: var(--radius);
     font-weight: 500;
     cursor: pointer;
     transition: all 0.2s;
     border: none;
     text-decoration: none;
     font-size: 0.875rem;
 }

 .btn-primary {
     background-color: var(--primary);
     color: white;
 }

 .btn-primary:hover {
     background-color: var(--primary-hover);
     transform: translateY(-1px);
 }

 /* Forms */
 .form-group {
     margin-bottom: 1.5rem;
 }

 .form-group label {
     display: block;
     font-size: 0.875rem;
     font-weight: 500;
     margin-bottom: 0.5rem;
 }

 .form-control {
     width: 100%;
     padding: 0.625rem 0.875rem;
     border-radius: var(--radius);
     border: 1px solid var(--border);
     background-color: var(--bg-card);
     transition: border-color 0.2s;
 }

 .form-control:focus {
     outline: none;
     border-color: var(--primary);
     box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
 }

 /* Navbar */
 .nav {
     background-color: var(--bg-card);
     border-bottom: 1px solid var(--border);
     padding: 1rem 2rem;
     display: flex;
     justify-content: space-between;
     align-items: center;
 }

 .nav-brand {
     font-size: 1.25rem;
     font-weight: 700;
     color: var(--primary);
 }

 /* Data Table */
 .data-table {
     width: 100%;
     border-collapse: separate;
     border-spacing: 0;
 }

 .data-table th {
     background-color: #f1f5f9;
     padding: 1rem;
     text-align: left;
     font-weight: 600;
     font-size: 0.75rem;
     text-transform: uppercase;
     letter-spacing: 0.05em;
 }

 .data-table td {
     padding: 1rem;
     border-bottom: 1px solid var(--border);
     font-size: 0.875rem;
 }

 /* Alerts */
 .alert {
     padding: 1rem;
     border-radius: var(--radius);
     margin-bottom: 1rem;
     font-size: 0.875rem;
     border: 1px solid transparent;
 }

 .alert-danger {
     background-color: #fee2e2;
     color: #b91c1c;
     border-color: #fecaca;
 }

 .alert-success {
     background-color: #d1fae5;
     color: #065f46;
     border-color: #a7f3d0;
 }

 .alert-warning {
     background-color: #fef3c7;
     color: #92400e;
     border-color: #fde68a;
 }

 /* Responsive */
 @media (max-width: 768px) {
     .container {
         padding: 1rem;
     }

     .nav {
         flex-direction: column;
         gap: 1rem;
     }
 }