* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: sans-serif;
  background: rgb(172, 35, 48);
}

.header {
  text-align: center;
  text-transform: uppercase;
  padding: 5px;
  background-color: #FFD700;
  color: #4169e1;
  border-bottom: 4px solid #000000;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr); 
  gap: 10px;
  justify-content: left;
  max-width: fit-content;
  margin: 10px; 
  padding: 10px;
}

.gallery-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.gallery img {
  width: 80px; 
  height: 80px;
  object-fit: cover;
  filter: grayscale(100%) sepia(30%) hue-rotate(200deg) saturate(80%);
  border-radius: 10px;
  border-color: #4169e1;
  transition: filter 0.3s ease;
}

.caption {
  text-align: center;
  font-size: 12px; 
  color: #23caca;
  margin: 0;
}

.gallery img.grayscale-off {
  filter: grayscale(0%) sepia(0%) hue-rotate(0deg) saturate(100%);
}