header{
  display: flex;
  justify-content: flex-start;
  align-items: center;
  padding: 0 5px;
  height: 60px;
  width: 100%;
  top: 0;
  background: var(--back-color);
  position: fixed;
  box-sizing: border-box;
  z-index: 100;
}

.logo{
  width: 150px;
}

header h1{
  margin:0;
  font-size: 5px;
}

.sp-menu{
  margin-left: auto;
}

.sp-menu #open{
  font-size: 18px;
  line-height: 24px;
  cursor: pointer;
  color: aliceblue;
  height: 24px;
}

.sp-menu .icon-div{
  position: fixed;
  height: 24px;
  width: 24px;
  top: 15px;
  right: 16px;
  text-align:center;
  background: var(--font-color);
}

.sp-menu #open.hide{
  display: none;
  background: white;
}

#sp-nav ul{
  font-size: 20pt;
}

#sp-nav a{
  color: var(--font-color);
  text-decoration: none;
}

main{
  padding: 0 16px;
}

.overlay{
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  background: rgba(255,255,255,0.9);
  text-align: center;
  padding: 64px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s;
}

.overlay.show{
  opacity: 1;
  pointer-events: auto;
  z-index: 200;
}

.overlay #close{
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 32px;
  cursor: pointer;
  background: white;
}

.overlay ul{
  list-style-type: none;
  margin: 0;
}

.overlay li{
  margin-top: 24px;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .3s, transform .3s;
}

.overlay.show li{
  opacity: 1;
  transform: none;
}

.overlay.show li:nth-child(1){
  transition-delay:.1s
}

.overlay.show li:nth-child(2){
  transition-delay:.2s
}

.overlay.show li:nth-child(3){
  transition-delay:.3s
}

.overlay.show li:nth-child(4){
  transition-delay:.4s
}

.pc-menu{
  display: none;
  height: 50px;
}

.pc-nav{
  display: flex;
}

.pc-nav-line{
  margin: 0;
  padding-top: 5px;
  padding-left: 10px;
  font-size: 20px;
  font-weight: bold;
}

.blue-nav{
  background: var(--main-color);
}

.orange-nav{
  background: var(--sub-color);
}

@media (min-width: 900px){
  header{
    padding-left: 38px;
    padding-top: 15px;
    height: 90px;
    align-items: flex-start;
  }

  .logo{
    width: 260px;
    height: auto;
  }

  .logo img{
    width: 100%;
    height: 100%;
  }

  .pc-menu{
    display: block;
    margin-left: auto;
  }

  .pc-menu ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
  }

  .pc-menu li {
    display: flex; 
    align-items: center;
    height: 27px;
    width: 130px;
    margin-left: 10px;
  }

  .pc-menu a {
    display: block;
    text-align: center;
    text-decoration: none;
    color: #fff;
    font-size: 15px;
    margin: auto;
  }

  .pc-menu a:hover{
    background-color: #f2f2f2;
  }

  .sp-menu{
    display: none;
  }
}