body {
  display: flex;
  flex-direction: column;
}

/* Header */

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-left {
  display: flex;
  align-items: center;
  flex-grow: 1;
}

.header-item {
  display: flex;
  align-items: center;
}

/* Navigationsleiste und Content-Bereich */

.sidebar-navigation-layout {
  display: flex;
}

/* Navigationsleiste */

nav {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.menu-item {
  display: flex;
  align-items: center;
}

.menu-item span {
  flex: 1 0 80%;
}

/* Content-Breich */

main {
  flex: 1 1 100%;
}

.grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1%;
}

.tile {
  flex: 0 1 24%;
}