:root {
    --primary-color: #4e73df;
    --secondary-color: #858796;
    --success-color: #1cc88a;
    --info-color: #36b9cc;
    --warning-color: #f6c23e;
    --danger-color: #e74a3b;
    --light-color: #f8f9fc;
    --dark-color: #5a5c69;
}

body {
    background-color: #f8f9fc;
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.navbar {
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
}

.card {
    border: none;
    border-radius: 0.35rem;
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.1);
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 1.5rem 0 rgba(58, 59, 69, 0.2);
}

.card-header {
    background-color: #f8f9fc;
    border-bottom: 1px solid #e3e6f0;
    font-weight: 600;
}

.table {
    color: var(--dark-color);
    margin-bottom: 0;
}

.table th {
    border-top: none;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--secondary-color);
}

.table td {
    vertical-align: middle;
}

.btn {
    border-radius: 0.35rem;
    font-weight: 600;
    padding: 0.375rem 0.75rem;
    transition: all 0.3s;
    margin-right: -10px;

}
.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-info {
    background-color: var(--info-color);
    border-color: var(--info-color);
}

.btn-warning {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
    color: #fff;
}

.btn-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.alert {
    border-radius: 0.35rem;
    border: none;
}

.form-control {
    border-radius: 0.35rem;
    padding: 0.375rem 0.75rem;
}

.form-control:focus {
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
    border-color: #bac8f3;
}

/* Recharge specific styles */
.recharge-card {
    border-left: 0.25rem solid var(--primary-color);
}

.recharge-card .card-body {
    padding: 1rem 1.5rem;
}

.recharge-amount {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.recharge-method {
    font-size: 0.9rem;
    color: var(--secondary-color);
}

/* Animation classes */
.animate-delay-1 {
    animation-delay: 0.1s;
}

.animate-delay-2 {
    animation-delay: 0.2s;
}

/* Loading spinner */
.loading-spinner {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    vertical-align: text-bottom;
    border: 0.25em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-border 0.75s linear infinite;
}

@keyframes spinner-border {
    to { transform: rotate(360deg); }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .table-responsive {
        display: block;
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}