header {
  /*text-align: center;*/
  z-index: 9;
  width: 100%;
  height: 80px;
  transition: transform .6s;
  top: 0px;
  position: fixed;
}

nav{
  background: #000000;
  height: 80px;
  width: 100%;
  position: relative;
  box-shadow: -2px 2px 10px 0px rgba(68, 68, 68, 0.4);
}
nav .logo{
  /*display: none;*/
  color: #FFFFFF;
  /*font-size: 35px;*/
  /*line-height: 80px;*/
 /* padding: 0 100px;*/
  padding-left: 2vw;
  font-weight: bold;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  /*margin-top: -9px;*/
  transition: all .5s linear;
  cursor: default;
}
nav .logo h1{
  vertical-align: middle;
  line-height: 60px;
  width: 60px;
  height: 60px;
  font-size: 40px;
  text-align: center;
  border-radius: 100%;
  border: 1px solid #FFFFFF;
}

nav ul{
  /*float: right;
  margin-right: 2vw;*/
  text-align: center;
}
nav ul li{
  display: inline-block;
  line-height: 80px;
  margin: 0 5px;
}
nav ul li a{
  color: #FFFFFF;
  font-size: 17px;
  padding: 7px 13px;
  border-radius: 3px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s linear;
}
nav ul li a.active,nav ul li a:hover{
  /*background: #666666;*/
  color: #666666;
}
/*nav ul li a:hover{
  transition: .5s;
}*/

.checkbtn{
  font-size: 30px;
  color: #FFFFFF;
  float: right;
  line-height: 80px;
  margin-right: 40px;
  cursor: pointer;
  display: none;
}
#check{
  display: none;
}

.sticky{
  position: fixed;
  top: 0;
}

.sticky nav .logo{
  /*display: block;*/
  opacity: 1;
}

@media (max-width: 952px){
  /*label.logo{
    font-size: 30px;
    padding-left: 50px;
  }*/
  /*nav ul li a{
    font-size: 16px;
  }*/
}
@media (max-width: 858px){
  .checkbtn{
    display: block;
  }
  header {
    position: fixed;
    top: 0;
  }
  nav ul{
    position: fixed;
    width: 100vw;
    height: 100vh;
    background: #000000;
    top: 80px;
    left: -100vw;
    text-align: center;
    transition: all .5s;
    z-index: 9;
  }
  nav ul li{
    display: block;
    margin: 50px 0;
    line-height: 30px;
  }
  /*nav ul li a{
    font-size: 20px;
  }*/
  nav ul li a:hover,nav ul li a.active{
    background: none;
    color: #666666;
  }
  #check:checked ~ ul{
    left: 0;
  }
  nav label.logo{
    margin-top: 0;
  }
  nav label.logo img{
    height: auto;
    max-width: 25vw;
    vertical-align: middle;
  }
}