body { font-family: 'Segoe UI', sans-serif; background: #f8f9fa; }
.card { box-shadow: 0 4px 15px rgba(0,0,0,0.1); }
.modal-content { border-radius: 12px; }
.btn-primary { background: #007bff; }
.table th { background: #343a40; color: white; }