.flex-container-nav {
  position: sticky;
  top: 0;
  background-color: white;
  z-index: 10;
  display: flex;
  width: 70vw;
  height: 9vh;
  margin: 20px auto;
  justify-content: space-between;
  flex-direction: row;
  align-items: center;
  flex-wrap: wrap;
}

.itkv-logo {
  display: block;
  object-fit: contain;
  width: 15vw;
}

.itkv-logo-mobile {
  display: none;
  object-fit: contain;
  width: 10vw;
}

nav {
  display: flex;
  height: 100%;
  justify-content: space-between;
  align-content: center;
  transition: 0.2s;
  background-color: white;
}

nav a {
  margin: 3vh 2vw;
  padding: 5px;
  position: relative;
  display: block;
  color: #0056b8;
  text-decoration: none;
  transition: 0.5s;
  background-color: white;
}
nav a::after {
  position: absolute;
  content: "";
  left: 0;
  top: 100%;
  width: 100%;
  height: 1px;
  background: #0056b8;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.2s;
}
nav a:hover {
  transform: scale(0.9);
}
nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* HAMBURGER */
.hamburger {
  padding: 10px;
  display: none;
  cursor: pointer;
  transition-property: opacity, filter;
  transition-duration: 0.15s;
  transition-timing-function: linear;
  font: inherit;
  color: inherit;
  text-transform: none;
  background-color: transparent;
  border: none;
  margin: 0;
  overflow: visible;
  width: 50%;
}
.hamburger:hover {
  opacity: 0.7;
}
.hamburger.is-active:hover {
  opacity: 0.7;
}
.hamburger.is-active .hamburger-inner,
.hamburger.is-active .hamburger-inner::before,
.hamburger.is-active .hamburger-inner::after {
  background-color: #000;
}

.hamburger-box {
  width: 30px;
  height: 20px;
  display: block;
  position: relative;
  float: right;
  border: none;
}

.hamburger-inner {
  display: block;
  top: 50%;
  margin-top: -2px;
}
.hamburger-inner,
.hamburger-inner::before,
.hamburger-inner::after {
  width: 30px;
  height: 1px;
  background-color: #000;
  border-radius: 0px;
  position: absolute;
  transition-property: transform;
  transition-duration: 0.15s;
  transition-timing-function: ease;
}
.hamburger-inner::before,
.hamburger-inner::after {
  content: "";
  display: block;
}
.hamburger-inner::before {
  top: -8px;
}
.hamburger-inner::after {
  bottom: -8px;
}

.hamburger--minus .hamburger-inner::before,
.hamburger--minus .hamburger-inner::after {
  transition: bottom 0.08s 0s ease-out, top 0.08s 0s ease-out, opacity 0s linear;
}

.hamburger--minus.is-active .hamburger-inner::before,
.hamburger--minus.is-active .hamburger-inner::after {
  opacity: 0;
  transition: bottom 0.08s ease-out, top 0.08s ease-out, opacity 0s 0.08s linear;
}

.hamburger--minus.is-active .hamburger-inner::before {
  top: 0;
}

.hamburger--minus.is-active .hamburger-inner::after {
  bottom: 0;
}

/* RESPONSIVE SMARTPHONE*/

@media only screen and (max-width: 600px) {
  .flex-container-nav {
    width: 95%;
    height: 6vh;
    padding: 1vh 0 1vh 0;
    margin: auto;
  }

  nav {
    width: 100%;
    display: none;
    flex-direction: column;
    margin: 0 auto;
  }

  nav a {
    text-align: center;
    width: 100%;
    margin: 0 auto;
    font-size: 1.2em;
    padding: 15px 0;
    border-bottom: 1px solid #0056b8;
  }

  nav a:first-child {
    border-top: 1px solid #0056b8;
  }

  nav a:first-child {
    margin-top: 20px;
  }

  .itkv-logo {
    display: none;
  }

  .itkv-logo-mobile {
    display: block;
  }

  .hamburger {
    display: block;
  }

  .nav-logo {
    width: 50%;
  }
}