HTMLify

html {
  box-sizing: border-box;
}
*, *:before, *:after {
  box-sizing: inherit;
  -webkit-transition: all ease 0.3s;
  transition: all ease 0.3s;
}

body{
  /*font: caption;*/
  font-family: 'Open Sans', sans-serif, 'Helvetica Neue', 'Lucida Grande';
  font-size: 16px;
  text-align: center;
  color: white;
}

body, h1,h2,h3, h4, p{
	margin:0;
	padding:0;
}

.main-cont {
  width: 100%;
  height: 100%;
  position: fixed;
  background: -webkit-linear-gradient(left, #CC0000 0%, #FF5100 100%);
  background: linear-gradient(to right, #57ebd7 0%,  #24a88b 100%);
/*linear-gradient(90deg, #CC0000 0%, #FF5100 100%);*/
  z-index: -4;
}

#mobile-text-input {
  position: absolute;
  top:-500px;
  left:-500px;
}

#show-keyboard-button {
  margin: 40px 0 0 0;
  display: none;
}
#show-keyboard-button:hover{
  background: none;
  color: white;
}

#about-cont{
  background: rgba(0,0,0,0.5);
  width: 100%;
  height: 100%;
  padding: 20px;
  z-index: 1;
  display: none;
}

.content-wrapper{
  width: 600px;
  margin: 0 auto;
  position: relative;
  height: 100%;
}
.content-wrapper, .char-cont {
  padding: 0 20px;
}

.about-white-bg {
  background: rgba(255, 255, 255, 1);
  padding: 20px;
  color: #333;
  border-radius: 4px;
  position: absolute;
  top: 50%;
  left: 0;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
  z-index: 2;
  width: 100%;
}

.about-text {
  color: #666666;
}

.about-text a{
  color: #CC0000;
  text-decoration: none;
}
.about-text a:hover {
  text-decoration: underline;
}

.about-image {
  background:url('https://mahdif.github.io/alphabets-game/images/omgomgomg.gif') center no-repeat;
  width:100%;
  height:150px;
  margin: 20px 0;
}

hr {
  border: none;
  border-bottom: 1px solid rgba(0,0,0,0.1);
  margin: 20px 0;
}

.about-title {
  font-size: 24px;
  font-weight: 400;
}

#hide-button {
  padding: 10px 20px;
  margin: 20px 0 0 0;
  background: white;
  border: 1px solid rgba(0,0,0,0.2);
  font-size: 16px;
  border-radius: 2px;
  color: rgba(0,0,0,0.7);
  cursor: pointer;
}
#hide-button:hover {
  background: #CC0000;
  color: white;
}
#hide-button:active {
  background: #980000;
  color: white;
}

.char-cont {
  width: 100%;
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
  z-index: -1;
}

.char {
  font-size: 160px;
  font-weight: 300;
  position: relative;
}
.animationHabibi {
  animation: growAnimation 0.2s ease-in-out 0s;
  -webkit-animation: growAnimation 0.2s ease-in-out 0s;
  -moz-animation: growAnimation 0.2s ease-in-out 0s;
}

footer {
  position: fixed;
  bottom: 20px;
  left: 0;
  width: 100%;
  z-index: -2;
}

.habibi-button {
  display: inline-block;
  margin: 0 10px;
  padding: 14px 30px;
  font-size: 14px;
  background: none;
  color: white;
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 2px;
  cursor: pointer;
}

.habibi-button:hover {
  background: white;
  color: #DB1010;
}

.habibi-button:active {
  background: rgba(0,0,0,0.4);
  border-color: rgba(0, 0, 0, 0);
  color: white;
}

/* Make me responsive */
@media screen and (max-width: 800px){
  body {
    font-size: 14px;
  }
  .about-title {
    font-size: 18px;
  }
  .char {
    font-size: 80px;
  }
  .content-wrapper {
    width: 100%;
    overflow: auto;
  }
  .char-cont {
    position: relative;
    -webkit-transform: none;
            transform: none;
    top: 0;
    margin: 40px 0 20px 0;
  }
  .animationHabibi {
    -webkit-animation: none;
            animation: none;
  }
  #show-keyboard-button {
    display: inline-block;
  }
  footer {
    position: relative;
    margin-top: 200px;
    bottom: 0;
  }
}
@media screen and (max-width: 600px){
  .char {
    font-size: 50px;
  }
  .about-image {
    height: 90px;
    background-size: 90%;
  }
}

/*
  Animation habibi
*/
@-webkit-keyframes growAnimation {
  0%   {
    opacity: 0;
    font-size: 0;
  }
  100% {
    opacity: 1;
    font-size: 160px;
  }
}
@keyframes growAnimation {
  0%   {
    opacity: 0;
    font-size: 0;
  }
  100% {
    opacity: 1;
    font-size: 160px;
  }
}