/* ======================= */
/* ===== ハンバーガー ===== */
/* ======================= */

.menu{
  height: 100px;
}

  .menu ul {
  display: flex;
  justify-content: center;
  align-items: center;
  list-style-type: none;
  padding: 0;
  margin: 0;
  position: fixed;
  top: -100vh;
  left: 0;
  width: 100vw;
  z-index: 10;
  }

.menu li {
background-image: linear-gradient(60deg, #29323c 0%, #485563 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  transition: transform .3s ease-in-out;
  height: 100vh;
  width: 20vw;
}

.menu li a {
  color: #fff;
  letter-spacing: 2px;
  text-decoration: none;
  text-transform: uppercase;
}

.menu li a:hover {
  text-decoration: underline;
}

.menu li:nth-of-type(2) {
  transition-delay: .025s;
}

.menu li:nth-of-type(3) {
  transition-delay: .05s;
}

.menu li:nth-of-type(4) {
  transition-delay: .075s;
}

.menu li:nth-of-type(5) {
  transition-delay: .1s;
}

.menu.open li {
  transform: translateY(100vh);
}

@media (max-width: 768px) {
  .menu ul {
      flex-direction: column;
  top: 0;
  left: -100vw;
  }

  .menu li {
      height: 20vh;
      width: 100vw;
  }

  .menu.open li {
      transform: translateX(100vw);
  }
}

/* Hamburger menu */
.hamburger {
  background-color: #fff;
  border: 1px solid #000 ;
  border-radius: 50%;
  position: fixed;
  top: 30px;
  right: 30px;
  cursor: pointer;
  width: 40px;
  height: 40px;
  z-index: 10;
}

.hamburger:focus {
outline: 0;
}

.hamburger .line {
background-color: #000;
display: block;
margin: 4px auto;
height: 2px;
width: 16px;
transition: all .1s ease-in;
}

.hamburger.open .line:nth-child(1) {
transform:translateY(6px) rotate(45deg) ;
}

.hamburger.open .line:nth-child(2) {
opacity: 0;
}

.hamburger.open .line:nth-child(3) {
transform:translateY(-6px) rotate(-45deg) ;
}