: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:#ffffff;--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 rgba(0,0,0,0.05);--shadow:0 1px 3px rgba(0,0,0,0.1),0 1px 2px rgba(0,0,0,0.06)}*,:after,:before{box-sizing:border-box;margin:0;padding:0}body,html{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased}a{color:var(--color-primary);text-decoration:none}button{cursor:pointer}button,input,select,textarea{font-family:inherit;font-size:inherit}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);color:var(--color-text);font-weight:500;transition:background .15s,border-color .15s}.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);font-weight:600;font-size:15px}.card-body,.card-header{padding:16px 20px}table{width:100%;border-collapse:collapse}td,th{padding:10px 12px;text-align:left;border-bottom:1px solid var(--color-border)}th{font-weight:600;color:var(--color-text-muted);font-size:12px;text-transform:uppercase;letter-spacing:.05em}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:4px;font-weight:500;font-size:13px;color:var(--color-text-muted)}.form-group input,.form-group select{width:100%;padding:8px 12px;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);transition:border-color .15s}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 2px rgba(37,99,235,.15)}.error-text{color:var(--color-error);font-size:13px;margin-top:4px}.loading-spinner{display:flex;align-items:center;justify-content:center;padding:48px;color:var(--color-text-muted)}.empty-state{text-align:center;padding:48px 20px;color:var(--color-text-muted)}.page-header{margin-bottom:24px}.page-header h1{font-size:24px;font-weight:700;margin-bottom:4px}.page-header p{color:var(--color-text-muted)}