@media screen and (max-width: 767px) {
    .table-stack thead {
        display: none;
    }
    .table-stack tr {
        display: block;
        margin-bottom: 1rem;
        border: 1px solid #dee2e6;
        border-radius: 0.25rem;
        padding: 0.5rem;
        background: #fff;
    }
    .table-stack td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        text-align: right;
        border-top: none;
        padding: 0.5rem;
    }
    .table-stack td::before {
        content: attr(data-label);
        font-weight: bold;
        text-align: left;
        margin-right: 1rem;
    }
}

.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border-radius: 0.5rem;
    overflow: hidden;
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
    font-weight: bold;
}

.btn {
    border-radius: 0.25rem;
    padding: 0.5rem 1rem;
    font-weight: 500;
}

.btn-lg {
    min-height: 44px;
}

@media (max-width: 576px) {
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
}