CSS
html {
font-size: 14px;
}
@media screen and (max-width: 480px) {
html {
font-size: 11px;
}
}
body {
display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-orient: vertical;
-webkit-box-direction: normal;
-ms-flex-direction: column;
flex-direction: column;
min-height: 100vh;
-webkit-box-pack: center;
-ms-flex-pack: center;
justify-content: center;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
}
.menu-wrapper {
margin: 0 auto;
}
.menu-wrapper:not(.open) .letter {
cursor: pointer;
}
.menu-wrapper:not(.open) .letter:hover {
border-color: #f00;
}
.menu-wrapper:not(.open) .letter:hover:after,
.menu-wrapper:not(.open) .letter:hover:before {
background: #f00;
border-color: #f00;
}
.letter {
font-size: 4em;
height: 1em;
width: 1em;
display: inline-block;
margin: 0 0.25rem;
position: relative;
vertical-align: top;
opacity: 1;
-webkit-transition: opacity 0.2s ease-in-out;
transition: opacity 0.2s ease-in-out;
}
.letter:before,
.letter:after {
-webkit-transition: all 0.2s ease;
transition: all 0.2s ease;
}
.letter.m {
border-left: 2px solid #000;
border-right: 2px solid #000;
}
.letter.m:before {
content: '';
width: 2px;
height: 1em;
background: #000;
display: inline-block;
-webkit-transform: rotate(-30deg);
transform: rotate(-30deg);
-webkit-transform-origin: 0% 0%;
transform-origin: 0% 0%;
}
.letter.m:after {
content: '';
width: 2px;
height: 1em;
position: absolute;
right: 0;
background: #000;
display: inline-block;
-webkit-transform: rotate(28deg);
transform: rotate(28deg);
-webkit-transform-origin: 0% 0%;
transform-origin: 0% 0%;
}
.letter.e {
border-left: 2px solid #000;
border-top: 2px solid #000;
border-bottom: 2px solid #000;
width: 0.8em;
-webkit-transition: all 0.2s ease-in-out 0.2s;
transition: all 0.2s ease-in-out 0.2s;
}
.letter.e:after {
content: '';
position: absolute;
top: 50%;
left: 0;
right: 0;
height: 2px;
background-color: #000;
-webkit-transition: all 0.2s ease-in-out 0.2s;
transition: all 0.2s ease-in-out 0.2s;
}
.letter.n {
border-left: 2px solid #000;
border-right: 2px solid #000;
width: 0.7em;
}
.letter.n:after {
content: '';
position: absolute;
top: 0;
bottom: -13px;
width: 2px;
background: #000;
-webkit-transform: rotate(-35deg);
transform: rotate(-35deg);
-webkit-transform-origin: 0 0;
transform-origin: 0 0;
}
.letter.u {
border-left: 2px solid #000;
border-right: 2px solid #000;
border-bottom: 2px solid #000;
border-radius: 0 0 0.5em 0.5em;
}
.hidden-menu {
visibility: hidden;
opacity: 0;
position: absolute;
top: 50%;
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
left: 50%;
right: 0;
text-align: center;
font-family: monospace;
-webkit-transition: opacity 0.2s ease-in-out;
transition: opacity 0.2s ease-in-out;
-webkit-transition-delay: 0.6s;
transition-delay: 0.6s;
}
.hidden-menu ul {
margin: 0;
padding: 0;
}
.hidden-menu li {
text-align: left;
width: 50%;
margin: 0 auto;
font-size: 2em;
cursor: pointer;
line-height: 1.4;
}
.hidden-menu li:before {
content: '>';
max-width: 0;
overflow: hidden;
display: inline-block;
vertical-align: middle;
-webkit-transition: all 0.2s ease-in-out;
transition: all 0.2s ease-in-out;
}
.hidden-menu li:hover:before {
max-width: 100px;
}
.menu-wrapper.open .hidden-menu {
visibility: visible;
opacity: 1;
}
.menu-wrapper.open > .letter:nth-child(even):not(.e) {
opacity: 0;
}
.menu-wrapper.open > .letter:nth-child(even):not(.e):before,
.menu-wrapper.open > .letter:nth-child(even):not(.e):after {
-webkit-transform: rotate(90deg) translate(500%, -500%);
transform: rotate(90deg) translate(500%, -500%);
}
.menu-wrapper.open > .letter:nth-child(odd):not(.e) {
opacity: 0;
}
.menu-wrapper.open > .letter:nth-child(odd):not(.e):before,
.menu-wrapper.open > .letter:nth-child(odd):not(.e):after {
-webkit-transform: rotate(-90deg) translate(-1000%, 0%);
transform: rotate(-90deg) translate(-1000%, 0%);
}
.menu-wrapper.open .e {
padding: 0 4em;
-webkit-transform: scale3d(1, 4, 1) rotateX(180deg);
transform: scale3d(1, 4, 1) rotateX(180deg);
border-right: 2px solid #000;
}
@media screen and (max-width: 480px) {
.menu-wrapper.open .e {
padding: 0 2em;
}
}
.menu-wrapper.open .e:after {
opacity: 0;
}
