body {
    margin: 0px;
    padding: 0px;
}

#head-title {
    position: relative;
    text-align: center;
}

#head-title-text {
    justify-content: center;
    align-items: center;
}

.folder_box {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.h2 {
    text-align: center;
}

@media (min-width: 768px) {
    .embed-responsive-item {
      width: 500px;
      height: 300px;
    }
  }