* {
    box-sizing: border-box;
    padding: 8px;
    margin: 8px;
  }
  
  html,
  body {
    height: 100%;
  }
  
  body {
    font-family: "Roboto", sans-serif;
    min-height: 100vh;
    background-color: rgb(194, 209, 230);
  }
  
  main, footer {
    color: #394e73;
    padding: 20px;
  }
  
  header,
  footer {
    height: 50px;
  }
  
  main {
    height:auto;
  }

.image-box{
    display:inline-block;
    border: 5px solid #394e73;
    padding: 10px;
    background-color: #e2e6ed;
}

.image-box img{
    max-width:100%;
    display:flex;
    border: 3px solid #8194b6;
}

.image-box figcaption{
    text-align: center;
    margin-top: 5px;
    font-size: x-large; stroke-width: 3px;
    color: #394e73;
}

.grid-container{
  display:grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  grid-auto-rows: minmax(100px,auto);
  max-width: 100%;
  gap: 30px;
}

.Item01{
  grid-column: 1 / 5;
  grid-row: 1;
}
.Item02{
  grid-column-start: 1;
  grid-column-end: 3;
  grid-row: 2;
  background-color: #e2e6ed;
  border: 2px dashed #a1b7df;
  border-radius: 20px;
}

.Item03{
grid-column-start: 3;
  grid-column-end: 5;
  grid-row:2;
  background-color: #e2e6ed;
  border: 2px dashed #a1b7df;
  border-radius: 20px;
}

header {
  background-color: #394e73;
  color: white;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.back-btn {
  background: #8194b6;
  color: white;
  border: none;
  padding: 10px 20px;
  font-size: 1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.back-btn:hover {
  background: #a1b7df;
  transform: translateX(-5px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}