<section>
  <div class="container">
    <header>Header</header>
    <nav>Nav</nav>
    <main>Main</main>
    <aside>Sidebar</aside>
    <footer>Footer</footer>
  </div>
</section>

@import url("https://fonts.googleapis.com/css2?family=Exo:wght@600&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 100vw;
  min-height: 100vh;

  display: flex;
  justify-content: center;
  flex-direction: column;
  gap: 20px;
  font-family: "Exo", Arial, sans-serif;
  background-color: #f7f7f7;

  padding: 20px;
}

section {
  width: 90vw;
  min-height: calc(80vh - 40px);
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.container {
  border: 1px dashed #f36;
  box-shadow: 0 0 0 6px rgb(0 0 0 / 13%);
  border-radius: 1px;
}

.container > * {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px;
  gap: 5px;
  color: #fff;
  font-size: 1.2rem;
  text-shadow: 1px 1px 0 rgb(0 0 0 / 0.5);
}

header {
  background-color: #f1c2c6;
}

aside {
  background-color: #dac2f1;
}

main {
  background-color: #ccf1c2;
}

footer {
  background-color: #c2e9f1;
}

nav {
  background-color: #09f;
}

.container {
  display: grid;

  /*   grid-template:
    [header-start] "header header header" 80px [header-end]
    [nav-start main-start sidebar-start] "nav    main   sidebar" 1fr [nav-end main-end sidebar-end]
    [footer-start] "footer footer footer" 60px [footer-end]
    / 1fr min(75ch, 80vw)
    1fr; */

  grid-template:
    [header-start] "header header header" 80px [header-end]
    [nav-start main-start sidebar-start] "nav    main   sidebar" 1fr [nav-end main-end sidebar-end]
    [footer-start] "footer footer footer" 60px [footer-end]
    / [header-start nav-start footer-start] 1fr [nav-end main-start] min(
      75ch,
      80vw
    )
    [main-end sidebar-start] 1fr [header-end sidebar-end footer-end];
}

header {
  grid-area: header;
}
nav {
  grid-area: nav;
}
main {
  grid-area: main;
}
aside {
  grid-area: sidebar;
}
footer {
  grid-area: footer;
}