.header{
  width: 100%;
  position: fixed;
  background-color: tomato;
  top: 0;
  left: 0;
  right: 0;
  z-index: 4;

  border-bottom-left-radius: 5px;
  border-bottom-right-radius: 5px;
  box-shadow: 0px 5px 5px gray;
}

.hdr-ctr{
  flex-grow: 1;

  max-width: 81rem;
  margin: 0 auto;

  position: sticky;
  z-index: 6;
  background-color: tomato;

  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: 10px 15px;
}

/* Left Part of the Header. */

.logo-ctr{
  width: 100px;
  height: 50%;
}

.logo-ctr img{
  width: 100%;
  height: 100%;  
  border-radius: 5px;
}

/* Middle Part of the Header. */

.nav-ctr{
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 15px;
  padding: 10px 5px;
}


.nav-ctr a,.slide-nav-ctr a{
  text-align: center;
  margin: 0px 5px;
  text-decoration: none;
  color: black;
  font-size: large;
  padding: 10px;
  transition-duration: 0.15s;
}

.nav-ctr a:hover,.slide-nav-ctr a:hover{
  border-radius: 3px;
  background-color: black;
  color: white;
}

.menu-btn{
  width: 35px;
  height: 35px;
  background-color: transparent;
  display: none;
  margin-left: auto;
  margin-right: 10px;
  border: none;

  cursor: pointer;
  transition-duration: 0.15s;
}

.menu-btn img{
  width: 100%;
  height: 100%;
}

/* Right Part of the Header. */

.link-ctr{
  display: flex;
  flex-wrap: wrap;
  justify-content: space-evenly;
}

.link-ctr a{
  width: 33px;
  padding: 5px;
  margin: 0px 5px;
}

.link-ctr img{
  width: 100%;
  height: 100%;
  transition-duration: 0.15s;
}

.link-ctr img:hover{
  transform: scale(1.2);
  filter: drop-shadow(0px 0px 3px black);
}

/* Slide menu container. */

.slide-nav-ctr {
  max-width: 81rem;
  margin: 0 auto;

  display: flex;
  flex-direction: column;
  align-items: center;
  row-gap: 5px;  
  padding: 5px 20px;
  padding-bottom: 10px;
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;

  position: fixed;
  left: 0;
  right: 0;
  background-color: tomato;
  z-index: 5;
  transition: 0.15s;
  transform: translateY(-150%);
}

.slide-nav-ctr.show{
  transition: 0.15s;
  transform: translateY(0%);
}

.slide-nav-ctr a{
  text-align: start;
  width: 100%;
}