html {
    width: 100%;
    height: 100%;
}

body {
    width: 100%;
    height: 100%;
    background-color: lightblue;
    margin: 0;
    -ms-overflow-style: none;
    scrollbar-width: none;
}

    body::-webkit-scrollbar {
        display: none;
    }

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1;
    background-color: cadetblue;
    color: white;
    height: 5%;
}


.logo {
    float: left;
    padding: 10px;
}

.element {
    float: left;
    padding: 10px;
}

.menu {
    float: left;
    height: 100%;
}

content {
    position: fixed;
    top: 5%;
    left: 0;
    right: 0;
    bottom: 5%;
    width: auto;
    height: auto;
    z-index: 0;
    overflow: auto;
    -ms-overflow-style: none;
    scrollbar-width: none;
}

    content::-webkit-scrollbar {
        display: none;
    }

    content div {
        float: left;
    }

    content ul {
        width: 100%;
        height: auto;
        margin: 0;
        padding: 0;
    }

        content ul li {
            display: block;
            float: left;
            width: calc((100% - 30px) / 3);
            height: 250px;
            background-color: cadetblue;
            color: white;
            margin: 5px;
            border-radius: 15px;
        }

.content_main {
    background-color: white;
    width: 80%;
    height: auto;
    min-height: 100%;
}

.content_left {
    width: 10%;
    height: 100%;
}

.content_right {
    width: 10%;
    height: 100%;
}

footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1;
    background-color: cadetblue;
    color: white;
    height: 5%;
}

.copyright {
    float: left;
    padding: 10px;
}

.statistics {
    height: calc(100% - 20px);
}

    .statistics iframe {
        position: relative;
        margin: 0;
        border-radius: 5px;
        overflow: hidden;
        height: 100%;
    }

.copy_date {
    float: right;
    padding: 10px;
}

.button {
    border-radius: 5px;
    height: auto;
    background-color: cadetblue;
    color: white;
    padding: 5px;
    text-decoration: none;
}

.menu .button {
    background-color: white;
    color: grey;
    margin: 5px;
    height: calc(100% - 20px);
    text-align: center;
}

.button:hover {
    background-color: aquamarine;
    color: grey;
}