.navbar {
  background: #e6f0ff;
  padding: 1rem;
  text-align: center;
}
.navbar a {
  color: black;
  margin: 0 1rem;
  text-decoration: none;
  font-weight: bold;
}
.navbar a:hover {
  text-decoration: underline;
}

.description {
    max-width: 1000px;
    margin: 0 auto;       /* centers horizontally */
    padding: 20px;
  }

.grid_2 {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 3 images per row */
    gap: 15px;
    max-width: 1000px;
    margin: auto;
}

.grid_hybrid {
    display: grid;
    grid-template-columns: repeat(3, 1fr); /* 3 images per row */
    gap: 15px;
    max-width: 1000px;
    margin: auto;
}

.stack {
    display: grid;
    grid-template-columns: repeat(6, 1fr); /* 3 images per row */
    gap: 15px;
    max-width: 1000px;
    margin: auto;
}

.grid_3 {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 3 images per row */
    gap: 15px;
    max-width: 1000px;
    margin: auto;
}
.grid_4 {
    display: grid;
    grid-template-columns: repeat(3, 1fr); /* 3 images per row */
    gap: 15px;
    max-width: 600px;
    margin: auto;
}

figure {
    margin: 0;
    text-align: center;
}
figure img {
    width: 100%;
    height: auto;
    border-radius: 8px;
}
figcaption {
    margin-top: 6px;
    font-size: 14px;
    color: #444;
}