body {
    min-height: 100vh;
    text-align:center;
    background-image: linear-gradient(to bottom, Teal, DarkCyan);
    font-family: Verdana, sans-serif;
    height: 100vh;
}

.container {
  display: grid;
  grid-template-areas:
    "header header"
    "menu content"
    "footer footer";
  grid-template-columns: 1fr 3fr;
  gap: 3px;
  background-color: black;
  padding: 5px;
}
.container div {
  background-image: linear-gradient(to bottom, #D3F3F5, SteelBlue);
  padding: 10px;
}
.container div.header {
  grid-area: header;
  color:white;
  text-shadow: 2px 2px black;
  text-align: left;
}
.container div.menu {
  grid-area: menu;
}
.container div.content {
  grid-area: content;
}
.container div.footer {
  grid-area: footer;
  text-align: center;  
}