body{
  margin: 0;
  font-size: 14px;
}    
a:hover{
  opacity: 0.5;
}
a{
  text-decoration: none;
}
  

.logo{
    text-align: center;
    padding: 50px;
}    
.logo img {width: 220px;}

@media screen and (min-width: 768px){
    .logo img {width: 280px;}
}  
/*main-pic*/
picture img{
    width: 100vw;
  }
/*main-pic end*/
/*main nav */
.main-nav {
    padding: 10px;
}
.main-nav ul{
    display: flex;
    justify-content: center;   
}
.main-nav li{
    list-style: none;
    margin:0 90px 0 0;
}
.text-1{
    color: black;  
}
/*main nav end*/  
/*main concept*/
.main-concept{
    display: grid;
    max-width: 1280px;
    grid-template-columns: auto;
    grid-template-rows: auto;
    place-items: center;
    gap: 25px 25px;
    margin: 0 auto;
    min-height: auto;
    grid-template-areas:
    "concept"
    "moji-concept";

}
.concept-pic{
    width: 90%;
    height: 90%;
    margin: 0 5px 0 25px;
    align-items: center;
    justify-items: center;
}
.main-concept .moji-concept{
    width: auto;
    justify-self: left;
}
.moji-concept .text-2{
    justify-self: left;
    font-size: 16px;
    letter-spacing: 0.1em;
    margin: 0 0 10px 20px;
}
.moji-concept .text-3{
    justify-self: left;
    font-size: 28px;
    font-weight: bold;
    overflow-wrap: normal;
    letter-spacing: 0.1em;
    color: #24a8bf;
    margin: 20px 0 10px 20px;  
}
.moji-concept .text-4{
    justify-self: left;
    letter-spacing: 0.1em;
    margin:0 0 20px 20px
}

@media screen and (min-width: 768px) {
.main-concept {
    width: 700px;
    height: 700px;
    grid-template-areas:
    "concept moji-concept"; 
    }
  

.main-concept .moji-concept{
    width: auto;
    text-align: left;
}
.moji-concept .text-2{
    text-align: left;
    font-size: 16px;
    letter-spacing: 0.1em;
    margin-bottom: 10px;
}
.moji-concept .text-3{
    text-align: left;
    font-size: 28px;
    font-weight: bold;
    overflow-wrap: normal;
    letter-spacing: 0.1em;
    color: #24a8bf;
    margin-bottom: 10px;  
}
.moji-concept .text-4{
    text-align: left;
    letter-spacing: 0.1em;
}
}
/*main concept end*/
.moji-blog1{font-size: 30px;
  font-weight: bold;
  line-height: 1;
  letter-spacing: 0.08em;
  color: #24a8bf;
  text-align: center;
  margin-bottom: 5px;
}
.moji-blog2{
  text-align: center;
}
/*grid */
.grid-container {
    display: grid;
    max-width: 1280px;
    grid-template-columns: auto;
    grid-template-rows: auto;
    place-items: center;
    gap: 25px 0px;
    margin: 0 auto;
    min-height: auto;
    grid-template-areas:
    "grid1"
    "grid2"
    "grid3"
    "grid4"
    "grid5"
    "grid6";
}
.grid-1{
  display: grid;
  width: 90%;
  height: 90%;
  margin: 0 auto;
  align-items: center;
  justify-items: center;
}
.grid-2{
  display: grid;
  width: 90%;
  height: 90%;
  margin: 0 auto;
  align-items: center;
  justify-items: center; 
}
.grid-3{
  display: grid;
  width: 90%;
  height: 90%;
  margin: 0 auto;
  align-items: center;
  justify-items: center; 
}
.grid-4{
  display: grid;
  width: 90%;
  height: 90%;
  margin: 0 auto;
  align-items: center;
  justify-items: center;
}
.grid-5{
  display: grid;
  width: 90%;
  height: 90%;
  margin: 0 auto;
  align-items: center;
  justify-items: center; 
}
.grid-6{
  display: grid;
  width: 90%;
  height: 90%;
  margin: 0 auto;
  align-items: center;
  justify-items: center; 
  
}
.date{
  display: grid;
  justify-items: center0;
  align-items: center;
  font-size: 11px;
  margin-left: 25px;
  text-decoration: none;

}
.kiji{
  display: grid;
  justify-items: center0;
  align-items: center;
  font-size: 13px;
  margin-left: 25px;
  text-decoration: none;
}
.blog-index{
  display: block;
  position: relative;
  width: auto;
  font-size: 15px;
  font-weight: bold;
  line-height: 1;
  color: #24a8bf;
  text-align: center;
  margin: 15px 20px 15px 20px;
  padding: 25px 0;
  transition: opacity 0.3s;
  border: 1px solid #24a8bf;
  border-radius: 4px;
}
@media screen and (min-width: 768px) {
  .grid-container {
    grid-template-areas:
      "grid1 grid2 grid3"
      "grid4 grid5 grid6";
  }
      .blog-index{
        display: block;
        position: relative;
        width: 220px;
        font-size: 15px;
        font-weight: bold;
        line-height: 1;
        color: #24a8bf;
        text-align: center;
        margin: 10px auto;
        padding: 25px;
        transition: opacity 0.3s;
        border: 1px solid #24a8bf;
        border-radius: 4px;   
      }
}
/*blog index*/


.blog-index::after{
  display: block;
  content: "";
  position: absolute;
  top: 50%;
  right: 1em;
  width: 5px;
  height: 10px;
  transform: translateY(-50%);
  background-image: url("./images/icon_arrow-right.png");
  background-repeat: no-repeat;
  background-size: 5px 10px;
}
/*blog index end*/
/*footer*/
.footer {
    padding: 70px 0 30px;
    background-color: black;
  }
  
  .footer .logo-footer{
    width: 180px;
    margin: 0 auto;
    margin-bottom: 50px;
  }
  
  .footer .copyright {
    font-size: 12px;
    letter-spacing: 0.05em;
    color: #8b8b8b;
    text-align: center;
  }