style.css

@import url('https://fonts.googleapis.com/css?family=Quicksand&display=swap');
body {
    margin: 0;
    padding: 0;
    background-color: rgb(255, 255, 255);
}

h1 {
    background-image: url(./img/bg.jpg);
    background-size: 100%;
    background-repeat: no-repeat;
    margin-top: 0;
    padding: 4rem;
    text-align: center;
    color: white;
    font-size: 5rem;
    font-family: 'Quicksand', sans-serif;
}
@media(max-width:460px) {
    h1 {
    font-size: 3rem;

    }
}
.col-5 {
    max-width: 400px !important;
    width: 100%;
    max-height: 1000px;
    height: 100%;
    background-color: rgb(243, 243, 243);
    text-align: center;
    margin-top: 7%;
    margin-right: auto;
    margin-left: auto;
    border-radius: 8px;
    opacity: 0.8;
}

img {
    max-width: 100%;
    min-width: 250px;
    width: 90%;
    margin-top: 30px;
    border-radius: 8px;
}

a {
    text-decoration: none;
    color: rgb(19, 8, 177) !important;
    background-image: linear-gradient(rgb(23, 0, 155) 50%, rgb(8, 11, 165) 50%);
    background-position: center bottom;
    background-repeat: no-repeat;
    background-size: 0 2px, 100% 2px;
    padding-bottom: 3px;
    transition: .5s ease-in-out;
}

a:hover {
    background-size: 100% 2px, 100% 2px;
    color: #FE5568;
}

ul {
    list-style-type: none;
}

li {
    font-size: 1.5rem;
    text-align: left;
    margin-top: 10px;
}

span {
    color: black !important;
}

.sub-menu {
    display: none;
}

.main-item:focus~.sub-menu, .main-item:active~.sub-menu, .sub-menu:hover {
    display: block;
}