@import url(https://fonts.googleapis.com/css?family=Roboto:400,900);

#menu {
  background-color: #e54722;
  padding: 1px 8px;
  border-radius: 10%;
}
#menu nav {
  z-index: 9;
  background-color: white;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease-in-out;
}
#menu nav ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
  position: absolute;
  left: 50%;
  top: 170px;
  transition: all 0.3s ease-in-out;
  transform: translateX(-50%);
}
#menu nav ul li {
  transform: translateY(50px);
  opacity: 0;
}
#menu nav ul li a {
  display: block;
  font-size: 2em;
  text-decoration: none;
  padding: 10px 0;
  text-align: center;
  color: #e54722;
  /* font-weight: bold; */
  transition: all 0.2s ease-in-out;
  /* text-shadow: 1px 1px 2px rgba(0, 0, 0, .5); */
}
#menu nav ul li a:hover {
  color: #0096d8;
  text-decoration: none;
}
.toggle-btn {
  display: block;
  position: relative;
  z-index: 10;
  cursor: pointer;
}
.toggle-btn .bar {
  width: 30px;
  height: 2px;
  margin: 7px auto;
  background-color: #fff;
  transition: all 0.3s ease-in-out;
  /* box-shadow: 0 0 3px 1px rgba(0, 0, 0, .3); */
}
.toggle-btn .bar:nth-child(2) {
  width: 20px;
}
#toggle:checked ~ nav {
  opacity: 1;
  visibility: visible;
}
#toggle:checked ~ nav ul {
  top: 70px;
}
#toggle:checked ~ nav ul li {
  transform: translateY(0px);
  opacity: 1;
}
/* #toggle:checked ~ nav ul li:nth-child(1) {
  transition: all 0.3s cubic-bezier(0.6, 0, 0.8, 1.5) 0.1s;
}
#toggle:checked ~ nav ul li:nth-child(2) {
  transition: all 0.3s cubic-bezier(0.6, 0, 0.8, 1.5) 0.2s;
}
#toggle:checked ~ nav ul li:nth-child(3) {
  transition: all 0.3s cubic-bezier(0.6, 0, 0.8, 1.5) 0.3s;
}
#toggle:checked ~ nav ul li:nth-child(4) {
  transition: all 0.3s cubic-bezier(0.6, 0, 0.8, 1.5) 0.4s;
} */
#toggle:checked + label.toggle-btn .bar {
  background-color: red;
}
#toggle:checked + label.toggle-btn .bar:nth-child(2) {
  transform: translateX(50px);
  opacity: 0;
}
#toggle:checked + label.toggle-btn .bar:nth-child(1) {
  transform: translateY(10px) rotate(45deg);
}
#toggle:checked + label.toggle-btn .bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}