@charset "utf-8";
/* ハンバーガーボタン（820px以下で表示・テールの四角） */
#menu-button {
  display: none;
  position: fixed;
  top: 16px;
  right: 20px;
  z-index: 900;
  width: 50px;
  height: 50px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: #008796;
  border: 0;
  cursor: pointer;
}

#menu-button .c-menu-btn__lines {
  position: relative;
  margin: 0 auto;
  width: 30px;
  height: 22px;
}

#menu-button .c-menu-btn__lines span,
#menu-button .c-menu-btn__lines::before,
#menu-button .c-menu-btn__lines::after {
  position: absolute;
  display: block;
  right: 0;
  left: 0;
  margin: 0 auto;
  width: 30px;
  height: 2px;
  background-color: #fff;
  border-radius: 1px;
}

#menu-button .c-menu-btn__lines span {
  bottom: 10px;
  transition: all 0.25s 0.25s;
  opacity: 1;
}

#menu-button .c-menu-btn__lines::before,
#menu-button .c-menu-btn__lines::after {
  content: "";
}

#menu-button .c-menu-btn__lines::before {
  bottom: 20px;
  animation: menu-bar01 0.75s forwards;
}

#menu-button .c-menu-btn__lines::after {
  bottom: 0px;
  animation: menu-bar03 0.75s forwards;
}

#menu-button.is-active .c-menu-btn__lines span {
  opacity: 0;
}

#menu-button.is-active .c-menu-btn__lines::before {
  animation: active-menu-bar01 0.5s forwards;
}

#menu-button.is-active .c-menu-btn__lines::after {
  animation: active-menu-bar03 0.5s forwards;
}

@keyframes menu-bar01 {
  0% {
    transform: translateY(8px) rotate(45deg);
  }
  50% {
    transform: translateY(8px) rotate(0);
  }
  100% {
    transform: translateY(0) rotate(0);
  }
}

@keyframes menu-bar03 {
  0% {
    transform: translateY(-8px) rotate(-45deg);
  }
  50% {
    transform: translateY(-8px) rotate(0);
  }
  100% {
    transform: translateY(0) rotate(0);
  }
}

@keyframes active-menu-bar01 {
  0% {
    transform: translateY(0) rotate(0);
  }
  50% {
    transform: translateY(8px) rotate(0);
  }
  100% {
    transform: translateY(8px) rotate(45deg);
  }
}

@keyframes active-menu-bar03 {
  0% {
    transform: translateY(0) rotate(0);
  }
  50% {
    transform: translateY(-8px) rotate(0);
  }
  100% {
    transform: translateY(-12px) rotate(-45deg);
  }
}

@media screen and (max-width: 820px) {
  #menu-button {
    display: flex;
  }
}