/*************************** navigation ***************************/
nav,
nav * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scroll-behavior: smooth;
}

nav li {
  list-style-type: none;
}

nav {
  width: 100%;
  position: fixed;
  z-index: 900;
  height: 80px;                   
  top: 0;
  left: 0;
  background-color: #656C81;
  justify-content: space-between;
  display: flex;
  backdrop-filter: blur(0.5rem);
}

a {
  text-decoration: none;
}

a.navbar-brand {
  height: 80px;                   
  width: 20vw;
  display: flex;
  justify-content: center;
  margin: 5px 1vw 0 3vw;          
}

a.navbar-brand img {
  width: 65%;
  object-fit: contain;
  max-height: 72px;               
}

nav > .navbar {
  margin: 40px 1vw;               
  margin-right: 4vw;
  font-family: "Barlow Condensed";
  font-weight: 600;
  font-size: 1.4vw;
  position: relative;
  top: -0.9vw;
}

nav .nav-item {
  position: relative;
  float: left;
  margin: 0;
  margin-right: 3vw;
}

nav .nav-item > li {
  height: 1.8vw;
}

nav .nav-item > a {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #ffeedf;
  transition: color 0.15s linear;
  position: relative;
}

nav .nav-item > a::after {
  content: "";
  position: absolute;
  bottom: -5px;                   
  left: 0;
  width: 0;
  height: 3.5px;                  
  background-color: #ffeedf;
  transition: width 0.3s ease;
}

nav .nav-item:hover > a::after {
  width: 100%;
}

.son {
  margin: 0;
  padding: 15px;                  
  list-style: none;
  display: none;
  position: absolute;
  top: 100%;
  margin-top: 25px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #656C81;
}

.son li {
  line-height: 25px;              
  padding: 10px 20px;            
}

.son li a {
  display: block;
  text-align: left;
  color: #ffeedf;
  font-size: 1.4vw;
  white-space: nowrap;
}

.son li a:hover {
  color: #ffd880;
}

nav .nav-item.submenu-active .son {
  display: block;
  border-radius: 15%;
}