body {
    background: #f0f0f0;
}

.card-header {
    border-bottom: 0px;
}

header {
    background: #fff;
}

/* Hình tròn chứa icon */
.icon-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #e9ecef;
    /* màu xám nhạt */
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: #0d6efd;
    /* xanh bootstrap */
}

/* Hiệu ứng hover */
.hover-card {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hover-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.card-toolset .card-body {
    padding: 24px;
}

.card-toolset .card-text {
    font-size: 14px;
    color: #777;
}

@media screen and (min-width: 769px) {
    .nav {
        border-left: solid 1px #eee;
        padding-left: 8px;
        margin-left: auto;
    }
}