body { background: #f8f9fa; }
.navbar { border-bottom: 1px solid #eaeaea; }
input, select, button { border-radius: 0.5rem !important; }
form { background: #fff; padding: 1.5rem; border-radius: 0.5rem; box-shadow: 0 2px 8px #0001; }
.list-group-item { cursor: pointer; }
#receipt { background: #fff; border-radius: 0.5rem; box-shadow: 0 2px 8px #0001; padding: 1rem; }