body {
  width: 100%;
  margin: 0;
}

header {
  display: flex;
  justify-content: space-between;
  max-width: 960px;
  margin: 60px auto;
  width: 100%;
}

#header-right {
  margin-top: 30px;
}

#header-right a {
  text-decoration: none;
  color: black;
  margin-left: 20px;
  margin-bottom:20px;
}

/*==================================================
　5-3-1 中心から外に線が伸びる（下部）
===================================*/

.gnavi{
  /*線の基点とするためrelativeを指定*/
position: relative;
padding-bottom: 5px;
}

.gnavi::after {
  content: '';
  /*絶対配置で線の位置を決める*/
  position: absolute;
  bottom: 0;
  left: 0;
  /*線の形状*/
  width: 100%;
  height: 2px;
  background:#636363;
  /*アニメーションの指定*/
  transition: all .3s;
  transform: scale(0, 1);/*X方向0、Y方向1*/
  transform-origin: center top;/*上部中央基点*/
}

/*現在地とhoverの設定*/

.gnavi:hover::after {
  transform: scale(1, 1);/*X方向にスケール拡大*/
}


#icon {
  width: 20px;
}

main {
  width: 100%;
}

#main-pic {
  width: 100%;
}

#about h1 {
  text-align: center;
}

#about-box {
  max-width: 960px;
  margin: 0 auto;
}

#about-box>p {
  font-weight: bold;
  border-bottom: 1px solid gray;
  width: fit-content;
}

#about-div2 dt{
  float: left;
}

#about-div2 dt::after {
  content: ":";
}

#works {
  margin-top: 100px;
}

#works-flex {
  display: flex;
  flex-wrap: wrap;
}

#works-flex img{
  width: 320px;
  padding: 20px;
  box-sizing: border-box;
}

.rotateX{
  animation-name:rotateXAnime;
  animation-duration:1.8s;
  animation-fill-mode:forwards;
}

@keyframes rotateXAnime{
  from{
    transform: rotateX(0);
    }
  to{
    transform: rotateX(-360deg);
    }
}

.rotateX2{
  animation-name:rotateXAnime2;
  animation-duration:2.3s;
  animation-fill-mode:forwards;
}

@keyframes rotateXAnime2{
  from{
    transform: rotateX(0);
    }
  to{
    transform: rotateX(-360deg);
    }
}


.box,.box2 {
  transition: all 0.5s ease;
  opacity: 1;
}

.box img:hover,.box2 img:hover {
  opacity: 0.7;
  transform: translateY(-20px);
}


#news-div1 {
  max-width: 960px;
  width: 100%;
  padding: 4%;
}

#news {
  margin-top: 60px;
  margin-bottom: 40px;
}

#news-div {
  margin: 0 auto;
  font-size: 0.9em;
  width: 85%;
}

#news-div1 dt {
  float: left;
  width:fit-content;
  padding: 15px 50px 15px 15px;
  border-bottom: 1px solid gray;
}

#news-div1 dd {
 padding:15px;
 border-bottom: 1px solid gray;
 width: 85%;
}

#dt-top {
  border-top: 1px solid gray;
}

#dd-top {
  border-top: 1px solid gray;
}

#contact h1 {
  text-align: center;
}

#contact{
  max-width: 960px;
  text-align: center;
  margin-top: 60px;
  padding: 6%;
}

#form {
  margin-top: 50px;
  text-align: left;
}

#form label {
  text-align: left;
}


#form dt{
  float: left;
  width: 15%;
  margin-bottom: 5px;
}

#form dd {
  margin-bottom: 5px;
}

#form dd input{
  width: 85%;
  border: 1px solid gray;
  padding: 10px;
}

#form dd textarea{
  width: 85%;
  border: 1px solid gray;
  padding: 10px;
}

#contact-a {
  margin-top: 15px;
  border: 1px solid black;
  display: inline-block;
  padding: 0 80px;
  background-color: rgb(48, 48, 48);
}

#contact-a:hover {
  background-color: rgb(160, 160, 160);
  border: 1px solid rgb(160, 160, 160);
}

#contact-a a {
  text-decoration: none;
  color: white;
}

footer {
  text-align: center;
  margin-top: 100px;
  background-color: rgb(43, 43, 43);
  color: white;
}
@media screen and (max-width: 959px){
  body {
    box-sizing: border-box;
  }
  header {
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin: 0 auto;
  }


  #header-left h1 {
    font-size: 1.8rem;
    text-align: center;
  }

  #header-right {
    display: flex;
    justify-content: center;
    margin-top: 0;
    flex-wrap:wrap;
  }

  #works-flex {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  #works{
    text-align: center;
  }
  
  #works-flex img{
    width: 80%;
    padding: 20px;
    box-sizing: border-box;
  }
  
  #news-div1 {
    max-width: 100%;
    padding: 4%;
  }

  header,#about-div,#news-div1 {
    width: 100%;
  }



  #about-box {
    width: 85%;
  }
 
 #news-div {
  width: 100%;
  text-align: left;
 }

  #news-div1 dt {
    float: none;
    padding: 0;
    border-top: 0;
    border-bottom: 0;
    padding-top: 10px;
  }
  
  #news-div1 {
    padding: 0;
  }



  #news-div dd {
   text-decoration: none;
   margin: auto ;
   padding: 0 0 10px 0;
   border-bottom: 1px solid gray;
   width: auto;
  }

  #dt-top {
    border-top: 0;
   
  }
  #dd-top {
    border-top: 0;
  }
  
  #contact {
    padding: 0;
  }
  
  #form {
    display: flex;
    flex-direction: column;
  }

}