body {
  margin: 20px;
  font-family: Arial, sans-serif;
  
  }
  
  .gallery-title {
  text-align: left;
  color: YellowGreen;
  margin-bottom: 10px;
  font-weight: bold;
  }
  
  .grid-container {
  display: grid;
  grid-template-columns: repeat(4, 100px); /* 4 fixed-width columns */
  gap: 10px;
  justify-content: center;
  }
  
  .grid-container img {
  width: 100px;
  height: 150px;
  object-fit: cover;
  cursor: pointer;
  border: 2px solid #ccc;
  border-radius: 4px;
  }
  
  #imgModal {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-color: rgba(0,0,0,0.8);
  justify-content: center;
  align-items: center;
  z-index: 1000;
  flex-direction: column;
  }
  
  #imgModal img {
  max-width: 90%;
  max-height: 80%;
  margin-bottom: 20px;
  border-radius: 8px;
  box-shadow: 0 0 20px black;
  }
  
  .btn-group {
  display: flex;
  justify-content: center;
  width: 100%;
  }
  
  .next-btn {
  font-size: 18px;
  color: white;
  cursor: pointer;
  background: none;
  border: 2px solid white;
  padding: 10px 30px;
  border-radius: 6px;
  transition: 0.2s ease-in-out;
  }
  
  .next-btn:hover {
  background-color: white;
  color: black;
  }
  
  .close-btn {
  position: absolute;
  top: 20px;
  right: 40px;
  font-size: 40px;
  color: white;
  cursor: pointer;
  }