@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 400;
  src: local("Source Sans Pro"), local("SourceSansPro-Regular"), url(http://themes.googleusercontent.com/static/fonts/sourcesanspro/v6/ODelI1aHBYDBqgeIAH2zlBM0YzuT7MdOe03otPbuUS0.woff) format("woff");
}



.buttons-container {
  margin-top: 80px;
  margin-left: 20px;
  text-align: center;
}

button {
  display: inline-block;
  margin: 0 1em;
  border: none;
  background: none;
}
button span {
  display: block;
}
button:focus {outline:0;}


/* ====================== lines button ==================================================*/
.lines-button {
  padding: 2rem 1rem;
  transition: .3s;
  cursor: pointer;
  user-select: none;
  border-radius: 0.57143rem;
  /* */
}
.lines-button:hover {
  opacity: 1;
}
.lines-button:active {
  transition: 0;
}

.lines {
  display: inline-block;
  width: 3rem;
  height: 0.45rem;
  background: #ecf0f1;
  border-radius: 0.28571rem;
  transition: 0.3s;
  position: relative;
}
.lines:before, .lines:after {
  display: inline-block;
  width: 3rem;
  height: 0.45rem;
  background: #ecf0f1;
  border-radius: 0.28571rem;
  transition: 0.3s;
  position: absolute;
  left: 0;
  content: '';
  -webkit-transform-origin: 0.28571rem center;
  transform-origin: 0.28571rem center;
}
.lines:before {
  top: 1rem;
  margin-top: 0px;
}
.lines:after {
  top: -1rem;
  margin-top: 0px;
}

.lines-button:hover .lines:before {
  top: 1.14286rem;
}
.lines-button:hover .lines:after {
  top: -1.14286rem;
}

.lines-button.close_lines {
  -webkit-transform: scale3d(0.8, 0.8, 0.8);
  transform: scale3d(0.8, 0.8, 0.8);
}
.lines-button.x.close_lines .lines {
  background: transparent;
}
.lines-button.x.close_lines .lines:before, .lines-button.x.close_lines .lines:after {
  -webkit-transform-origin: 50% 50%;
  transform-origin: 50% 50%;
  top: 0;
  width: 4rem;
  margin-top: 4px;
}
.lines-button.x.close_lines .lines:before {
  -webkit-transform: rotate3d(0, 0, 1, 45deg);
  transform: rotate3d(0, 0, 1, 45deg);
}
.lines-button.x.close_lines .lines:after {
  -webkit-transform: rotate3d(0, 0, 1, -45deg);
  transform: rotate3d(0, 0, 1, -45deg);
}