*,
*::before,
*::after{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html{
  font-size: 10px;
  
}

body{
  background-color: azure;
}

#upperpart{
  background-color: #0E2E3B;
}

#mess{
  display: block;
  width: 7%;
  height: 7%;
}

#head{
  display: flex;
  flex-direction: column;
}

#mess img{
  width: 100%;
  height: auto;
}

/* .overlay{
  width: 100%;
  height: 100vh;
  background-color: rgba(128, 125, 125, 0.85);
  position: fixed;
  transform: scaleX(0);
  opacity: 0;
  transition: opacity 1s;
} */

.menu{
  padding: 2rem 2.5rem;
  position: absolute;
  top: 1rem;
  right: 1rem;
  background-color: rgb(20, 73, 94);
  border: 1px solid black;
  z-index: 999;
  border-radius: 3px;
  cursor: pointer;
  display: none;
}

.container{
  font-size: 1.75rem;
  color: black;
}

.bar,
.bar::before,
.bar::after{
  content: "";
  position: absolute;
  width: 3rem;
  height: 2px;
  background-color: rgb(5, 5, 5);
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto;
  transition: all 650ms;
}

.bar::before{
  top: -2rem;
}

.bar::after{
  top: 2rem;
}

.open .bar{
  background-color: transparent;

}

.open .bar::before{
  transform: rotate(45deg);
}

.open .bar::after{
  transform: rotate(-45deg);
}

.open .bar::before,
.open .bar::after{
  top: 0;
}

nav{
  position: relative;
  height: 6rem;
  width: 35%;
  left: 32.7%;
  top: 3rem;
  line-height: 6rem;
  font-family: 'Varela Round',sans-serif;
  display: flex;
  border-radius: 7px;
  justify-content: space-evenly;
  text-transform: uppercase;
  background-color: rgb(255, 255, 255);
  box-shadow: 0 .3rem .8rem rgba(0,0,0,.2);
  overflow: hidden;
}

a{
  text-decoration: none;
}

.brand{
  color: #fff;
  height: 4rem;
  padding: 0 1rem;
  display: none;
}

nav ul{
  display: flex;
  list-style: none;
}

.nav-link{
  font-size: 1.5rem;
  font-weight: 700;
  color: #2c4066;
  margin-right: 1.5rem;
  padding: 0 1rem;
  display: block;
  position: relative;
  transform-style: preserve-3d;
  transform-origin: top;
  transition: transform 650ms ease-in-out;
}

.nav-link:hover{
  transform: rotateX(90deg);
}

.nav-item:last-child .nav-link{
  margin-right: 1.5rem;
}

.nav-link::after{
  background-color: #2082a8;
  content: attr(data-text);
  position: absolute;
  left: 0;
  bottom: -100%;
  padding: inherit;
  color: #fff;
  transform: rotateX(-90deg);
  transform-origin: top;
}

.nav-item:nth-child(odd){
  animation: up 1s forwards;
}

.nav-item:nth-child(even){
  animation: down 1s forwards;
}

/*Director's about*/
.person-about{
  border-radius: 4px;
  background: #069adf;
  border: none;
  border-radius: 7px;
  color: #FFFFFF;
  text-align: center;
  text-transform: uppercase;
  font-size: 14px;
  padding: 16px;
  width: 200px;
  transition: all 0.4s;
  cursor: pointer;
  margin: 5px;
}
.person-about:hover{
  background: rgb(95, 202, 245);
}
.person-about span {
  cursor: pointer;
  display: inline-block;
  position: relative;
  transition: 0.4s;
}
.person-about span:after {
  content: '\00bb';
  position: absolute;
  opacity: 0;
  top: 0;
  right: -20px;
  transition: 0.4s;
}
.person-about:hover span {
  padding-right: 25px;
}
.person-about:hover span:after {
  opacity: 1;
  right: 0;
}


@keyframes up{
  from{
    transform: translateY(-100%);
    opacity: 0;
  }
  to{
    transform: translateY(0);
    opacity: 1;
  }
}
@keyframes down{
  from{
    transform: translateY(100%);
    opacity: 0;
  }
  to{
    transform: translateY(0);
    opacity: 1;
  }
}


@media screen and (max-width: 800px){
  .brand{
    margin: 0 auto;
    animation: initial;
    margin-top: -13rem;
    height: 10rem;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .banner{
    width: 100%;
  }

  #upperpart{
    height: 100vh;
    perspective: 75rem;
    overflow: hidden;
  }

  nav{
    position: absolute;
    top: 0;
    left: 0;
    width: 30rem;
    height: 100vh;
    line-height: initial;
    flex-direction: column;
    border-radius: 0;
    box-shadow: none;
    text-align: center;
    transform: rotateY(180deg);
    transform-origin: top left;
    transition: transform 650ms ease-in-out;
  }

  nav ul{
    flex-direction: column;
    margin-top: -15rem;
  }

  .nav-link:hover{
    transform: none;
  }

  .nav-item:nth-child(n){
    animation: initial;
  }

  .nav-link{
    margin: 2rem 0;
  }

  #upperpart{
    height: 50%;
  }

  #upperpart.open nav{
    transform: rotateY(0);
    position: relative;
    z-index: 999;
  }

  .menu{
    display: block;
    top: 15%;
  }

  .open{
    opacity: 1;
    transform:scaleX(1);
    z-index: 999;
  }

  .linked{
    display: none;
  }

  #mess{
    display: none;
  }
}