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

body {
  background: #000;
  min-height: 200vh;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: 0.6s;
  padding: 40px 100px;
  z-index: 100;
}

header .logo {
  position: relative;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  font-size: 2em;
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: 0.6s;
}

header ul {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

header ul li {
  position: relative;
  list-style: none;
}

header ul li a {
  position: relative;
  margin: 0 15px;
  text-decoration: none;
  color: #fff;
  letter-spacing: 2px;
  font-weight: 500px;
  transition: 0.6s;
}

.banner {
  position: relative;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7) url("background.jpg");
  background-size: cover;
  background-blend-mode: darken;
}

header.sticky {
  padding: 5px 100px;
  background: #fff;
  transition: 0.6s;
}

header.sticky .logo,
header.sticky ul li a {
  color: #000;
  transition: 0.6s;
}

#menuToggle{
    display: none;
}

@media only screen and (max-width: 600px) {
  header {
    display: none;
  }
  #menuToggle
 {
   display: block;
   position: fixed;
   top: 50px;
   left: 50px;
   
   z-index: 1;
   
   -webkit-user-select: none;
   user-select: none;
 }
 
 #menuToggle a
 {
   text-decoration: none;
   color: #232323;
   
   transition: color 0.3s ease;
 }
 
 #menuToggle a:hover
 {
   color: tomato;
 }
 
 
 #menuToggle input
 {
   display: block;
   width: 40px;
   height: 32px;
   position: absolute;
   top: -7px;
   left: -5px;
   
   cursor: pointer;
   
   opacity: 0; /* hide this */
   z-index: 2; /* and place it over the hamburger */
   
   -webkit-touch-callout: none;
 }
 
 /*
  * Just a quick hamburger
  */
 #menuToggle span
 {
   display: block;
   width: 33px;
   height: 4px;
   margin-bottom: 5px;
   position: relative;
   
   background: #cdcdcd;
   border-radius: 3px;
   
   z-index: 1;
   
   transform-origin: 4px 0px;
   
   transition: transform 0.5s cubic-bezier(0.77,0.2,0.05,1.0),
               background 0.5s cubic-bezier(0.77,0.2,0.05,1.0),
               opacity 0.55s ease;
 }
 
 #menuToggle span:first-child
 {
   transform-origin: 0% 0%;
 }
 
 #menuToggle span:nth-last-child(2)
 {
   transform-origin: 0% 100%;
 }
 
 /* 
  * Transform all the slices of hamburger
  * into a crossmark.
  */
 #menuToggle input:checked ~ span
 {
   opacity: 1;
   transform: rotate(45deg) translate(-2px, -1px);
   background: #232323;
 }
 
 /*
  * But let's hide the middle one.
  */
 #menuToggle input:checked ~ span:nth-last-child(3)
 {
   opacity: 0;
   transform: rotate(0deg) scale(0.2, 0.2);
 }
 
 /*
  * Ohyeah and the last one should go the other direction
  */
 #menuToggle input:checked ~ span:nth-last-child(2)
 {
   transform: rotate(-45deg) translate(0, -1px);
 }
 
 /*
  * Make this absolute positioned
  * at the top left of the screen
  */
 #menu
 {
   position: absolute;
   width: 300px;
   margin: -100px 0 0 -50px;
   padding: 50px;
   padding-top: 125px;
   
   background: #ededed;
   list-style-type: none;
   -webkit-font-smoothing: antialiased;
   /* to stop flickering of text in safari */
   
   transform-origin: 0% 0%;
   transform: translate(-100%, 0);
   
   transition: transform 0.5s cubic-bezier(0.77,0.2,0.05,1.0);
 }
 
 #menu li
 {
   padding: 10px 0;
   font-size: 22px;
 }
 
 /*
  * And let's slide it in from the left
  */
 #menuToggle input:checked ~ ul
 {
   transform: none;
 }
}
