@import url("https://fonts.googleapis.com/css2?family=Ubuntu:wght@300&display=swap");
* {
    margin: 0;
    font-family: 'Ubuntu';
}

html {
    height: 100%;
}

header {
    margin-top: 20px;
    text-align: center;
    color: white;
}

h2 {
    text-align: center;
    font-size: 30px;
    color: white;
}

body {
    height: 100%;
    margin: 0;
    padding: 0;
    background-position: 50% 30%;
    background-repeat: no-repeat;
    background-size: cover;
}

.link {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
}

#excont {
    padding: 5px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 10px;
}

.box {
    padding: 10px;
    margin: 10px;
    display: flex;
    flex-wrap: wrap;
    margin-top: 20px;
    font-size: 1.5em;
    border: 2px solid white;
    align-content: center;
    cursor: pointer;
    background-image: url(../image/boxbkg.jpg);
    background-repeat: no-repeat;
    background-position: 50% 50%;
    font-weight: bold;
    background-size: cover;
}

a {
    text-decoration: none;
    color: white;
}

.box:hover {
    background-color: white;
}