header {
    background: #f2f2f2;
    padding: 7px 0;
}

header h1 {
    font-size: 24px;
    font-weight: bold;
    margin: 0;
}

header h2 {
    font-size: 18px;
    margin: 0;
}

.navbar-nav .dropdown-menu .dropdown-submenu {
    position: relative;
}

.navbar-nav .dropdown-menu .dropdown-submenu > .dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: -1px;
}

.navbar-nav .dropdown-menu .dropdown-submenu:hover > .dropdown-menu {
    display: block;
}

.carousel-caption {
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 5px;
}

.carousel-item img {
    height: 510px;
    object-fit: cover;
}

.box {
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
}