body > .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0;
  padding: 0;
}
body > .breadcrumb > li {
  display: inline-block;
}
body > .breadcrumb > li:not(:first-child)::before {
  content: ">";
}
body > .breadcrumb > li > a {
  display: inline-block;
  padding: 0.6em;
}

body > main > * > h2,
body > main > * > header > h2 {
  display: none;
}

body > header, body > .app.menu, body > main {
  transition: width 0.1s;
}
body > .collapse {
  background: url("action/back.svg") center no-repeat;
  border: none;
  cursor: pointer;
  font-size: 0;
  width: 24px;
}
body.collapse > .collapse {
  background-image: url("action/menu.svg");
}
body.collapse > header, body.collapse > .app.menu {
  width: 0;
}

@media (max-width: 600px) {
  body:not(.collapse) > .app.menu {
    width: calc(100vw - 24px);
  }
  body:not(.collapse) > .collapse {
    min-height: 32px;
  }
  body:not(.collapse) > .breadcrumb, body:not(.collapse) #notifications {
    display: none;
  }
  body:not(.collapse) > main {
    overflow: hidden;
    width: 24px;
  }
  body:not(.collapse) > main > * {
    opacity: 0;
  }
}
body {
  display: grid;
  grid-template-areas: "header collapse breadcrumb" "header main     main      " "menu   main     main      " "footer footer   footer    ";
  grid-template-columns: min-content min-content 1fr;
  grid-template-rows: min-content min-content 1fr min-content;
  height: var(--real-vh, 100vh);
  overflow: hidden;
}
body > .breadcrumb {
  grid-area: breadcrumb;
}
body > .collapse {
  grid-area: collapse;
}
body > header {
  background-color: #eee;
  grid-area: header;
  height: 64px;
}
body > .menu {
  grid-area: menu;
}
body > .menu > ul > li.administration > h3 {
  background-image: url("module/administration.svg");
}
body > .breadcrumb, body > .collapse, body > .menu {
  background-color: #eee;
}
body > main {
  grid-area: main;
}
body > main:not(:first-child) {
  border-left: 1px solid #ccc;
  border-top: 1px solid #ccc;
}
body > footer {
  grid-area: footer;
}

.main.logo {
  background: url("logo/itrocks.svg") center no-repeat;
  background-size: auto calc(100% - 1em);
  height: 100%;
}