.wrapper_buttons {
    text-align: center;
    display: inline-block;
    position: absolute;
    top: 50%;
    left: 50%;
  }
  .topnav {
    background-color: #000000;
    overflow: hidden;
    margin-top: -10px;
    margin-left: -9px;
    width: 100.9%;
  }
  
  /* Style the links inside the navigation bar */
  .topnav a {
    float: left;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
    font-family: 'Segoe UI';
    font-weight: 600;
  }
  
  /* Change the color of links on hover */
  .topnav a:hover {
    background-color: #ddd;
    color: black;
  }
  
  /* Add a color to the active/current link */
  .topnav a.active {
    background-color: #04AA6D;
    color: white;
  }
  


  
.titleproj {


  font-family: 'Noto Sans Lao', sans-serif;
}



.fade-in-section {
  opacity: 0;
  transform: translateY(20vh);
  visibility: hidden;
  transition: opacity 1200ms ease-out, transform 600ms ease-out,
    visibility 1200ms ease-out;
  will-change: opacity, transform, visibility;
}
.fade-in-section.is-visible {
  opacity: 1;
  transform: none;
  visibility: visible;
}


.column {
  float: left;
  width: 33.33%;
  padding: 5px;
}


/* Style the button that is used to open and close the collapsible content */



/* Style the collapsible content. Note: hidden by default */


/* CSS */
.button {
  appearance: none;
  background-color: #000000;
  border: 2px solid #1A1A1A;
  border-radius: 15px;
  box-sizing: border-box;
  color: #FFFFFF;
  cursor: pointer;
  display: inline-block;
  font-family: Roobert,-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";
  font-size: 16px;
  font-weight: 600;
  line-height: normal;
  margin: 0;
  min-height: 60px;
  min-width: 0;
  outline: none;
  padding: 16px 24px;
  text-align: center;
  text-decoration: none;
  transition: all 300ms cubic-bezier(.23, 1, 0.32, 1);
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  width: 177px;;
  will-change: transform;
}

.button-27:disabled {
  pointer-events: none;
}

.button-27:hover {
  box-shadow: rgba(0, 0, 0, 0.25) 0 8px 15px;
  transform: translateY(-2px);
}

.button-27:active {
  box-shadow: none;
  transform: translateY(0);
}