.main-page {
  background-color: var(--bg-app);
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
  display: grid;
  grid-template-columns: 1fr 1.5fr 1fr;
  grid-template-rows: auto 1fr 1fr;
  grid-template-areas:
    "navbar navbar navbar"
    "left center-top right"
    "left center-bottom right";
  height: 100vh;
  margin: 0;
}

.navbar {
  grid-area: navbar;
  background-color: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  height: 48px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
  order: -1;
}

.left-column {
  /*background-color: aqua;*/
  grid-area: left;
  height: 100%;
  display: flex;
  justify-content: center;
}

.right-column {
  /*
  background-color: lightgray;
  display: flex;
  */
  grid-area: right;
  height: 100%;
}

.center-top-column {
  /*background-color: green;*/
  grid-area: center-top;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.center-bottom-column {
  /*background-color: yellow;*/
  grid-area: center-bottom;
  height: 100%;
}