body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f0f0f0;
  }
  header {
    text-align: center;
    /* padding: 40px 0; */
    background-color: #5bc0de;
    color: white;
    border-radius: 10px;
  }
  h1 {
    font-size: 2.5em;
    margin-bottom: 20px;
  }
  .intro {
    text-align: left;
    margin-bottom: 30px;
  }
  .carousel {
    position: relative;
    width: 100%;
    height: 800px;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  }
  .carousel-inner {
    display: flex;
    transition: transform 0.5s ease;
  }
  .carousel-item {
    flex: 0 0 100%;
    padding: 20px;
    box-sizing: border-box;
    background-color: white;
    height:800px;
  }
  .carousel-item img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 8px;
  }
  .carousel-item h3 {
    margin-top: 20px;
    color: #2c6ccc;
    font-size: 1.2em; }

  .carousel-item p {
    margin-top: 10px;
  }
  .carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255,255,255,0.7);
    border: none;
    font-size: 24px;
    padding: 10px;
    cursor: pointer;
    transition: background-color 0.3s;
  }
  .carousel-control:hover {
    background-color: rgba(255,255,255,0.9);
  }
  .carousel-control.prev {
    left: 10px;
  }
  .carousel-control.next {
    right: 10px;
  }

  /* Collapse */

.collapsible {
    /* background-color: #5bc0de; */
    background-color: inherit;
    color: black;
    cursor: pointer;
    padding: 5px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 1.5rem;
    border-radius: 10px;
  }
  
  .active, .collapsible:hover {
    background-color: #2c6ccc;
  }
  
  .collapsible:after {
    content: '\002B';
    color: white;
    font-weight: bold;
    float: right;
    margin-left: 5px;
  }
  
  .active:after {
    content: "\2212";
  }
  
  .content {
    padding: 0 18px;
    max-height:0px;
    overflow: hidden;
    transition: max-height 0.2s ease-out;
    background-color: #f1f1f1;
  }
  
  /* function button */
  .navigation-buttons {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 1;
  }
  .nav-button {
    background-color: #fff;
    border: none;
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: background-color 0.3s;
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2em;
  }
  .nav-button:hover {
    background-color: #f0f0f0;
  }
  .share-popup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    z-index: 1001;}
    .share-popup h2 {
        margin-top: 0;
        color: #333;
      }
      .share-options {
        display: flex;
        justify-content: space-around;
        margin-top: 20px;
      }
      .share-option {
        display: flex;
        flex-direction: column;
        align-items: center;
        cursor: pointer;
      }
      .share-option img {
        width: 50px;
        height: 50px;
        margin-bottom: 10px;
      }
      .overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0,0,0,0.5);
        z-index: 999;
      }

      /* share button */
      .button {
        background-color: #fff;
        border: none;
        padding: 10px;
        border-radius: 50%;
        cursor: pointer;
        box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        transition: background-color 0.3s;
        width: 50px;
        height: 50px;
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: 2em;
      } 
       .button:hover {
        background-color: #f0f0f0;
      } 
      .popup {
        display: none;
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: white;
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 0 10px rgba(0,0,0,0.1);
        border: solid grey;
        color:rgb(31, 91, 188);
      }
      .close {
        position: absolute;
        top: 10px;
        right: 10px;
        cursor: pointer;
      }
      .google-btn {
        background-color: #fff;
        color: #757575;
        border: 1px solid #ddd;
        font-size: 1rem;
    }
    .google-btn:hover {
        background-color: #ebdfdf;
    }
    .facebook-btn {
      background-color: #fff;
        color: #757575;
        border: 1px solid #ddd;
        font-size: 1rem;
    }
    .facebook-btn:hover {
        background-color: #dbe2f0;
    }
    
    footer {
      padding: 10px;
      margin-top: 10px;
      color: #b7c8f4;
      background-color: inherit;
      text-align: center;
  }
  
  footer>p{border-bottom: none;}

  button.nav-button{width: 60px;padding :35px;}