One type of menus are full screen menus, which fills the whole page. They hide everything in the page and locate at the front of them. However, it is transparent and let to see the objects unclearly. These kind of menus attracts all of the user’s attention. Maybe it suits you and your site.

HTML
<!-- this script got from www.devanswer.com -->
<h1>Your Content</h1> <div class="outer-menu"> <input class="checkbox-toggle" type="checkbox" /> <div class="hamburger"> <div></div> </div> <div class="menu"> <div> <div> <ul> <li><a href="#">About</a></li> <li><a href="#">Products</a></li> <li><a href="#">Blog</a></li> <li><a href="#">Contact</a></li> </ul> </div> </div> </div> </div><a style="font-size: 8pt; text-decoration: none" target="_blank" href="http://www.devanswer.com">Developer Code</a>

CSS
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 300;
  src: local('Open Sans Light'), local('OpenSans-Light'), url(https://fonts.gstatic.com/s/opensans/v16/mem5YaGs126MiZpBA-UN_r8OUuhs.ttf) format('truetype');
}
@font-face {
  font-family: 'Pacifico';
  font-style: normal;
  font-weight: 400;
  src: local('Pacifico Regular'), local('Pacifico-Regular'), url(https://fonts.gstatic.com/s/pacifico/v15/FwZY7-Qmy14u9lezJ-6H6Mw.ttf) format('truetype');
}
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}
* {
  box-sizing: border-box;
  font-family: 'Open Sans', sans-serif;
  font-weight: 300;
}
a,
a:visited,
a:hover,
a:active {
  color: inherit;
  text-decoration: none;
}
h1 {
  font-family: 'Pacifico', cursive;
  font-weight: 400;
  font-size: 3em;
  text-align: center;
}
.outer-menu {
  position: fixed;
  top: 10vh;
  left: 0;
  z-index: 1;
}
.outer-menu .checkbox-toggle {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  cursor: pointer;
  width: 60px;
  height: 60px;
  opacity: 0;
}
.outer-menu .checkbox-toggle:checked + .hamburger > div {
  -webkit-transform: rotate(135deg);
          transform: rotate(135deg);
}
.outer-menu .checkbox-toggle:checked + .hamburger > div:before,
.outer-menu .checkbox-toggle:checked + .hamburger > div:after {
  top: 0;
  -webkit-transform: rotate(90deg);
          transform: rotate(90deg);
}
.outer-menu .checkbox-toggle:checked + .hamburger > div:after {
  opacity: 0;
}
.outer-menu .checkbox-toggle:checked ~ .menu {
  pointer-events: auto;
  visibility: visible;
}
.outer-menu .checkbox-toggle:checked ~ .menu > div {
  -webkit-transform: scale(1);
          transform: scale(1);
  transition-duration: 0.75s;
}
.outer-menu .checkbox-toggle:checked ~ .menu > div > div {
  opacity: 1;
  transition: opacity 0.4s ease 0.4s;
}
.outer-menu .checkbox-toggle:hover + .hamburger {
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.1);
}
.outer-menu .checkbox-toggle:checked:hover + .hamburger > div {
  -webkit-transform: rotate(225deg);
          transform: rotate(225deg);
}
.outer-menu .hamburger {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  width: 60px;
  height: 60px;
  padding: 0.5em 1em;
  background: rgba(33, 150, 243, 0.75);
  border-radius: 0 0.12em 0.12em 0;
  cursor: pointer;
  transition: box-shadow 0.4s ease;
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.outer-menu .hamburger > div {
  position: relative;
  flex: none;
  width: 100%;
  height: 2px;
  background: #FEFEFE;
  transition: all 0.4s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.outer-menu .hamburger > div:before,
.outer-menu .hamburger > div:after {
  content: '';
  position: absolute;
  z-index: 1;
  top: -10px;
  left: 0;
  width: 100%;
  height: 2px;
  background: inherit;
  transition: all 0.4s ease;
}
.outer-menu .hamburger > div:after {
  top: 10px;
}
.outer-menu .menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  visibility: hidden;
  overflow: hidden;
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
  outline: 1px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
}
.outer-menu .menu > div {
  width: 200vw;
  height: 200vw;
  color: #FEFEFE;
  background: rgba(41, 98, 255, 0.97);
  border-radius: 50%;
  transition: all 0.4s ease;
  flex: none;
  -webkit-transform: scale(0);
          transform: scale(0);
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.outer-menu .menu > div > div {
  text-align: center;
  max-width: 90vw;
  max-height: 100vh;
  opacity: 0;
  transition: opacity 0.4s ease;
  overflow-y: auto;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.outer-menu .menu > div > div > ul {
  list-style: none;
  padding: 0 1em;
  margin: 0;
  display: block;
  max-height: 100vh;
}
.outer-menu .menu > div > div > ul > li {
  padding: 0;
  margin: 1em;
  font-size: 24px;
  display: block;
}
.outer-menu .menu > div > div > ul > li > a {
  position: relative;
  display: inline;
  cursor: pointer;
  transition: color 0.4s ease;
}
.outer-menu .menu > div > div > ul > li > a:hover {
  color: #e5e5e5;
}
.outer-menu .menu > div > div > ul > li > a:hover:after {
  width: 100%;
}
.outer-menu .menu > div > div > ul > li > a:after {
  content: '';
  position: absolute;
  z-index: 1;
  bottom: -0.15em;
  left: 0;
  width: 0;
  height: 2px;
  background: #e5e5e5;
  transition: width 0.4s ease;
}