.file_upload_block {
  padding: 0 0 50px;
}

.file_upload_wrap {
  border: 2px solid #D8D8D8;
  padding: 50px 100px 50px;
}

.input_file {
  position: relative;
  padding: 50px 0 20px;
  text-align: center;
}

.drop_area {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 50px 0 0;
  border: 2px dashed #494949;
  background: rgba(22, 165, 191, 0);
  transition: all 0.25s cubic-bezier(0.21, 0.51, 0.51, 1);
}

.drop_area.dragover {
  border: 2px solid #16a5bf;
  background: rgba(22, 165, 191, 0.6);
}

#uploadFile {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  display: block;
  width: 300px;
  height: 80px;
  opacity: 0;
}

.upload_file_wrap {
  position: relative;
  display: inline-block;
}

.upload_btn {
  display: table;
  margin-top: 50px;
  width: 100px;
}

.file_upload_wrap.selected .upload_btn {
  display: none;
}

#image-preview {
  display: grid;
  grid-template-columns: repeat(5, 1fr); /* デフォルトで5列 */
  gap: 10px;
  margin-top: 20px;
}

/* 1024px以上で4列表示 */
@media screen and (max-width: 1024px) {
  #image-preview {
    grid-template-columns: repeat(4, 1fr); /* 4列表示 */
  }
  .file_upload_wrap {
    padding: 40px 80px 40px;
  }
  .input_file {
    padding: 40px 0 20px;
  }
  .drop_area {
    padding: 40px 0 0;
  }
}

/* 768px以上で3列表示 */
@media screen and (max-width: 768px) {
  #image-preview {
    grid-template-columns: repeat(3, 1fr); /* 4列表示 */
  }
  .drop_area {
    padding: 40px 20px 0;
    font-size: 14px;
  }
  .upload_btn {
  width: 70px;
  }
}

/* 480px以上で2列表示 */
@media screen and (max-width: 480px) {
  #image-preview {
    grid-template-columns: repeat(2, 1fr); /* 3列表示 */
  }
  .file_upload_wrap {
    padding: 30px 15px 30px;
  }
  .drop_area {
    padding: 20px 10px 0;
    font-size: 13px;
  }
}

#image-preview img {
  max-width: 100%;
  max-height: 100px;
  object-fit: cover;
}