html {
  margin: 0;
  padding: 0;
}

body {
  margin: 0;
  padding: 0;
  background-color: #ff685d;
  font-family: Helvetica Neue, Arial, sans-serif;
  color: #fff;
  overflow: hidden;
}

.menu {
  position: absolute;
  top: 20px;
  left: 20px;
  height: 46px;
  width: 46px;
}

.menu-link {
  width: 100%;
  height: 100%;
  position: absolute;
  z-index: 1002;
}

.menu-icon {
  position: absolute;
  width: 20px;
  height: 14px;
  margin: auto;
  left: 0;
  top: 0;
  right: 0;
  bottom: 1px;
}

.menu-circle {
  background-color: #fff;
  width: 100%;
  height: 100%;
  position: absolute;
  border-radius: 50%;
  transform: scale(1);
  z-index: 1000;
  transition: all 0.2s ease-in-out;
}

.menu-overlay {
  visibility: hidden;
  background-color: rgba(0,0,0,.5);
  color: #333;
  height: 100%;
  width: 100%;
  position: fixed;
  text-align: center;
  transition: opacity 0.2s ease-in-out;
  z-index: 1001;
}

.menu-overlay a {
  color: #333;
  font-weight: 600;
  font-size: 32px;
  padding: 2%;
  margin: 25% 1% 0;
  display: inline-block;
}

.menu-line {
  background-color: #333;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  position: absolute;
  left: 0;
  transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}

.menu-line-1 { top: 0; }

.menu-line-2 {
  top: 0;
  bottom: 0;
  margin: auto;
}

.menu-line-3 { bottom: 0; }

.menu:hover .menu-circle { transform: scale(1.4); }

.menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

.menu.open .menu-circle { transform: scale(60); }

.menu.open .menu-line-2 { opacity: 0; }

.menu.open .menu-line-1 { transform: translateY(7px) translateY(-50%) rotate(-45deg); }

.menu.open .menu-line-3 { transform: translateY(-7px) translateY(50%) rotate(45deg); }