body {
    background-color: #f8f9fa;
}

.card {
    border: none;
    border-radius: 8px;
}

.card-header {
    border-radius: 8px 8px 0 0 !important;
}

.stats-card {
    border-left: 4px solid;
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.table-responsive {
    max-height: 500px;
    overflow-y: auto;
}

.table thead {
    position: sticky;
    top: 0;
    z-index: 10;
}

.api-badge {
    font-size: 0.85rem;
    padding: 0.35em 0.65em;
}

.cost-positive {
    color: #198754;
}

.cost-negative {
    color: #dc3545;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.export-btn {
    transition: all 0.3s;
}

.export-btn:hover {
    transform: translateY(-2px);
}