:root{--color-primary:#2563eb;--color-primary-dark:#1d4ed8;--color-success:#16a34a;--color-warning:#d97706;--color-error:#dc2626;--color-info:#0284c7;--color-bg:#f1f5f9;--color-surface:#fff;--color-text:#1e293b;--color-text-muted:#64748b;--color-border:#e2e8f0;--color-sidebar:#0f172a;--color-sidebar-text:#cbd5e1;--color-sidebar-active:#1e293b;--radius:6px;--radius-lg:8px;--shadow-sm:0 1px 2px #0000000d;--shadow:0 1px 3px #0000001a,0 1px 2px #0000000f}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px}a{color:var(--color-primary);text-decoration:none}button{cursor:pointer;font-family:inherit;font-size:inherit}input,select,textarea{font-family:inherit;font-size:inherit}.btn{border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);color:var(--color-text);align-items:center;gap:6px;padding:8px 16px;font-weight:500;transition:background .15s,border-color .15s;display:inline-flex}.btn:hover{background:var(--color-bg)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-dark)}.btn-danger{background:var(--color-error);border-color:var(--color-error);color:#fff}.btn-danger:hover:not(:disabled){background:#b91c1c}.btn-success{background:var(--color-success);border-color:var(--color-success);color:#fff}.btn-success:hover:not(:disabled){background:#15803d}.btn-sm{padding:4px 10px;font-size:13px}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.card-header{border-bottom:1px solid var(--color-border);padding:16px 20px;font-size:15px;font-weight:600}.card-body{padding:16px 20px}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--color-border);padding:10px 12px}th{color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:12px;font-weight:600}.form-group{margin-bottom:16px}.form-group label{color:var(--color-text-muted);margin-bottom:4px;font-size:13px;font-weight:500;display:block}.form-group input,.form-group select{border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);width:100%;padding:8px 12px;transition:border-color .15s}.form-group input:focus,.form-group select:focus{border-color:var(--color-primary);outline:none;box-shadow:0 0 0 2px #2563eb26}.error-text{color:var(--color-error);margin-top:4px;font-size:13px}.loading-spinner{color:var(--color-text-muted);justify-content:center;align-items:center;padding:48px;display:flex}.empty-state{text-align:center;color:var(--color-text-muted);padding:48px 20px}.page-header{margin-bottom:24px}.page-header h1{margin-bottom:4px;font-size:24px;font-weight:700}.page-header p{color:var(--color-text-muted)}