html, body, form {
    height: 100vh;
    width: 100%;
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #EEEEEE;
    box-sizing: border-box;
    font-size: 12px;
}

#maincontainer {
    display: flex; /* displays flex-items (children) inline */
    flex-direction: column; /* stacks them vertically */
    height: 100vh; /* needs to take the parents height, alternative: body {display: flex} */
}

.main {
    flex: 1;
    overflow: auto;
    box-sizing: border-box;
    padding: 5px;
}

.mainHomePage {
    background-color: #FEFEFE;
    padding: 5px;
    box-sizing: border-box;
    border-radius: 10px;
}
.mainChild {
    background-color: white;
    padding: 5px;
    box-sizing: border-box;
    border-radius: 10px;
    height: fit-content;
    min-height: 100%;
}

section {
    height: 100%;
    overflow: auto;
    border-bottom: 1px solid;
    background: lightgreen;
}

.mainHeader {
    background-color: #EEEEEE;
    box-sizing: border-box;
    padding: 2px;
    border-bottom: 1px solid gray;
}

section:last-child {
    border: none
}

.mainFooter {
    background-color: lightgray;
    box-sizing: border-box;
    padding: 5px;
    border-top: 1px solid gray;
    min-width: 750px;
}
.MenuExtender {
    float: left;
    width: auto;
    height: auto;
}