:root{
  --textDarkColor:#2f3044;
  --textBlandColor:#7e8299;
  --primaryColor:#0094ff;
  --hoverColor:#0076cc;
  --heightStart:90px;
  --heightScroll:70px;
  --muteColor:#b5b5c3;
  --opacityColor: #fafaff;
}
* {
  box-sizing: inherit; 
}
.main {
  overflow: hidden;
}
html {
  font-size: 62.5%;
  font-family:  "Helvetica Neue" , Helvetica,Arial,sans-serif;
  line-height: 1.6rem;
  box-sizing: border-box;
  scroll-behavior: smooth; 
}
/* style cho nút scroll top */
#btn {
  position: fixed;
  bottom: 40px;
  right: 20px;
  height: 40px;
  width: 40px;
  background-color: var(--primaryColor);
  border-radius: 5px;
  opacity: 0.4;
  z-index: 1000;
  display: none;
}
#btn:hover{
  opacity: 1;
}
#btn .scroll-top-icon{
  position: relative;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.full-height{
  height:100%;
}
a{
  text-decoration: none;
}
ul{
  padding-left: 0;
  list-style: none;
  margin-top:0;
  margin-bottom: 0;
}
.active{
  color: var(--primaryColor) !important;
}
.btn {
  outline: none;
  background-color: var(--primaryColor);
  color: white;
  border: none;
  padding: 10px 24px;
  font-size: 1.2rem;
  border-radius: 5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s linear;
  
}
.btn:focus {
  outline: none !important;
  border: none !important;
}
.mb-5 {
  margin-bottom: 5rem;
}
.mb-3 {
  margin-bottom: 3rem;
}
.btn:hover {
  background-color: #0076cc;
  color: white;

}
.text-dark {
  color:var(--textDarkColor); 
  font-size:1.6rem;
  font-weight:600
}
.tex-bland {
  color:var(--muteColor); 
  font-size:1.6rem;
  font-weight:600
}
.text-bland-color {
  color:var(--textBlandColor); 
  font-size:1.6rem;
  font-weight:500
}
.button-text {
  padding:4px 14px; color:var(--primaryColor);
  font-size:1.2rem;
  background-color: rgba(0,148,255,.12);
  border-radius: 5px;
}
a {
  text-decoration: none !important;
}
a:hover {
  text-decoration: none !important;
}
/* css for scroll-bar */
::-webkit-scrollbar {
  width: 5px;
}

/* Track */
::-webkit-scrollbar-track {
  background: none; 
}
 
/* Handle */
::-webkit-scrollbar-thumb {
  background: #ccc; 
}