style.css

nav.nav {
    background-color: #1b003f;
    width: 100vw;
    position: relative;
    margin-left: -50vw;
    margin-top: 0;
    left: 50%;
}

body {
    background-color: #ffffff;
}

h1,
h2,
h3.resultCountry,
button {
    text-align: center;
    font-family: 'Roboto', sans-serif;
}

h1 {
    color: #e600a0;
}

h2 {
    color: white;
}

h3 {
    color: #cbcbcb;
}

div.col {
    text-align: center;
    margin: 10px 0;
    min-height: 300px;
}

button {
    background-color: #e600a0;
    border-radius: 30px;
    padding: 20px 50px;
    color: white;
    border: none;
    cursor: pointer;
    font-size: 1.3em;
    margin: 0 auto;
}

button:hover {
    background-color: #980469;
}

button:active,
button:focus {
    outline: none;
}

img.logo {
    width: 100px;
    padding: 15px;
}

img.back-image {
    position: absolute;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: 50% 50%;
    z-index: -1;
}

div.main-container {
    background-color: rgba(27, 0, 63, 0.95);
    padding: 20px;
    border-radius: 5px;
    width: 50%;
    margin: 100px auto;
    -webkit-box-shadow: 0px 0px 14px 0px rgba(230, 179, 211, 1);
    -moz-box-shadow: 0px 0px 14px 0px rgba(230, 179, 211, 1);
    box-shadow: 0px 0px 14px 0px rgba(230, 179, 211, 1);
}