body {
    width: 100%;
    background: white;
}

.bg-nen {
    background: #1374c0;
    color: #fff;
}

* {
    font-family: "Noto Serif",serif;
}

.xeophai {
    border-bottom: 30px solid #3156A3;
    border-left: 0px solid transparent;
    border-right: 50px solid transparent;
    height: 0;
    width: 350px; 
    line-height:25px;
    padding-left:8px;
    font: 18px;
    font-weight:bold;
}
.btntacvu{
    text-align:center;
    cursor:pointer
}



/* Remove default bullets */
ul, #myUL {
  list-style-type: none;

} 
/* Remove margins and padding from the parent ul */
#myUL {
  margin: 0;
  padding: 0;
}
#myUL a {
  color:black;
  text-decoration:none
}

/* Style the caret/arrow */
.caret {
  cursor: pointer;
  user-select: none; /* Prevent text selection */
}

/* Create the caret/arrow with a unicode, and style it */
.caret::before {
  content: "\25B6";
  color: black;
  display: inline-block;
  margin-right: 6px;
}

/* Rotate the caret/arrow icon when clicked on (using JavaScript) */
.caret-down::before {
  transform: rotate(90deg);
}

/* Hide the nested list */
.nested {
  display: none;
}

/* Show the nested list when the user clicks on the caret/arrow (with JavaScript) */
.active {
  display: block;
}