body{
font-family:sans-serif;
}

/*===============================================
●style.css 画面の横幅が1024px以上
===============================================*/
@media screen and (min-width: 1024px){

nav {
  margin: 27px auto 0;
  position: relative;
  width: 92%;
  height: 50px;
  background-color: #31C4BF;
  border-radius: 8px;
  font-size: 0;
}
nav a {
  line-height: 50px;
  height: 100%;
  font-size: 16px !important;
  display: inline-block;
  position: relative;
  z-index: 1;
  text-decoration: none;
  text-transform: uppercase;
  text-align: center;
  color: white;
  cursor: pointer;
}
nav .animation {
  position: absolute;
  height: 100%;
  top: 0;
  z-index: 0;
  transition: all .5s ease 0s;
  border-radius: 8px;
}
a:nth-child(1) {
  width: 100px;
}
a:nth-child(2) {
  width: 110px;
}
a:nth-child(3) {
  width: 100px;
}
a:nth-child(4) {
  width: 160px;
}
a:nth-child(5) {
  width: 120px;
}
a:nth-child(1):hover~.animation {
  width: 100px;
  left: 0;
  background-color: #cc7dd3;
}
nav .start-about, a:nth-child(2):hover~.animation {
  width: 110px;
  left: 100px;
  background-color: #c27dd3;
}
nav .start-blog, a:nth-child(3):hover~.animation {
  width: 100px;
  left: 210px;
  background-color: #c07dd3;
}
nav .start-portefolio, a:nth-child(4):hover~.animation {
  width: 160px;
  left: 310px;
  background-color: #ae7dd3;
}
nav .start-contact, a:nth-child(5):hover~.animation {
  width: 120px;
  left: 470px;
  background-color: #a77dd3;
}


}




/*===============================================
●smt.css  画面の横幅が1023pxまで
===============================================*/
@media screen and (max-width:1023px){

nav {
  margin: 27px auto 0;
  position: relative;
  width: 94%;
  height: 50px;
  text-align:center;
  background-color: #31C4BF;
  border-radius: 8px;
  font-size: 13px;
  padding:1% 2%;
}
nav a {
  line-height: 50px;
  height: 20%;
  color:#fff;
  text-decoration: none;
    padding:1% 2%;
}



}