:root {

}

* {
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14pt;
}

.container {
    margin: 0 auto;
    max-width: 1200px;
    display: grid;
    grid-gap: 15px;
    grid-template:
    "header header"
    "sidebar main"
    "footer footer"
    / 250px 1fr;
}

header {
    grid-area: header;

    display: flex;
    align-items: center;
    justify-content: center;

    text-align: center;
}

aside {
    grid-area: sidebar;
}

main {
    grid-area: main;
}

footer {
    grid-area: footer;
    overflow: hidden;

    display: flex;
    justify-content: center;
}

header nav menu {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

header nav menu li {
    display: inline;
}

header nav menu li.dropdown {
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    min-width: 200px;
    background-color: #f9f9f9;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

.dropdown-content a {
    display: block;
    padding: 5px 10px;
}

li.dropdown:hover .dropdown-content {
    display: block;
}

@media (max-width: 800px) {
    aside {
        display: none;
    }
}