body {
  background-color: rgba(29, 83, 65);
  background-image: url(../img/back.png);
  background-size: cover;
  background-repeat: no-repeat;
    color: white;
    margin: 0;
  min-width: 800px;
}

.wrapper {
    display: grid;
    grid-template: auto 1fr auto / auto 1fr 1fr auto;
  }
  
  
  nav, aside, footer {
    text-align: center;
  }
  
  header {
    grid-column: 1 / 5;
    background-color: black;
  }

  header div {
    display: flex;
    width: 100%;
  }

  header div ul {
    height: 1.5rem;
    margin: 1rem auto;
    padding: 0;
    list-style: none;
    display: inline-block;
  }

  header div ul #box {
  width: 10rem;
  height: 20px;
  }

  header div ul li {
    float: left;
  }

  header div ul li a {
    margin: 0 0.5rem 0 0.5rem;
    padding: 0;
    color: #fff;
    font-weight: bold;
    text-align: left;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
  }

  header div ul li dl {
    position: absolute;
    margin: 2px 0 0 0;
    padding: 1rem 0 0 0;
    left: 0;
    width: 100%;
    /* display: none; */
  }

  header div ul li dl div {
    background-color: rgba(235, 235, 235, 0.747);
  }

  header div ul li dl div #menu1s {
    left: 0;
    margin: 0 0 0 35%;
    background: none;
  }

  header div ul li dl div div {
    left: 0;
    margin: 0 0 0 50%;
    background: none;
  }
 
  header div ul li dl dd {
    float: left;
    margin: 0.5rem 0 0.5rem 0;
  }

  header div ul li dl dd a {
    color: black;
    font-weight: bold;
  }

  header div ul li dl {
    visibility: hidden;
    opacity: 0;
    transition: .2s ease-in-out;
  }

  header div ul li:hover > dl {
    visibility: visible;
    opacity: 1;
  }

  header #banner {
    width: 100%;
    height: 15rem;
    background-color: rgb(6, 47, 24);
    margin: 0;
    padding: 0;
  }

  header #banner img {
    margin: 0 10rem 0 10rem;
    width: 100%;
  }
 
  nav {
    grid-column: 1 / 2;
    background: linear-gradient( to top, rgba(29, 83, 65) 20%, rgb(6, 47, 24) 100%);
    padding: 5rem;
  }
  
  main {
    grid-column: 2 / 3;
    background-color:transparent;
    width: 100%;
}

  main div .box_black {
      background-color: black;
      color: white;
      box-shadow: 0 6px 10px 0 rgba(0, 0, 0, 0.5);
  }

  main div #main_box1 {
    width: 30rem;
    margin: 2rem 0 2rem 0;
    padding: 1rem 3rem 1rem 2rem;
    font-size: x-large;
    font-weight: bold;
}
main div #main_box1 p span{
    font-size: x-large;
    font-weight: bold;
    margin: 0;
}

main div #main_box2 {
    width: 20rem;
    margin: 5rem 0 2rem 0;
    padding: 1rem 3rem 1rem 2rem;
    font-size: large;
}

main div a{
  background-color: black;
  color: white;
  text-decoration: none;
}

main div #main_box3 {
    width: 24rem;
    margin: 1rem 0 2rem 0;
    padding: 1rem 3rem 1rem 2rem;
    font-size: large;
}

main div #main_box4 {
    width: 23rem;
    margin: 5rem 0 2rem 0;
    padding: 1rem 3rem 1rem 2rem;
    font-size: large;
    text-align: center;
}
main div #main_box4 p {
    margin: 0;
    animation: blink 1.5s ease-in-out infinite alternate;
    @keyframes blink {
        10% {opacity: 0;}
        100% {opacity: 1;}
    }
}

main div #main_box4 .blinking{
    margin: 0;
    animation:blink 1.5s ease-in-out infinite alternate;
 } 
 @keyframes blink{ 0% {opacity:0;} 100% {opacity:1;} }

  article {
    grid-column: 3 / 4;
background-color:transparent;
    width: 100%;
  }

  article div {
    width: 30rem;
    margin: 10rem 0 5rem 0;
}

  article div p {
      margin: 0;
  }

  #yellow_text {
    color: yellow;

}
  
  aside {
    grid-column: 4 / 5;
    background: linear-gradient( to top, rgba(29, 83, 65) 20%, rgb(6, 47, 24) 100%);
    padding: 5rem;
  }
  
  footer {
    grid-column: 1 / 5;
    background-color: black;
    text-align: right;
    padding: 0 20% 0 0;
    position: fixed;
    bottom: 0;
    width: 100%;
  }
  
  body {
    padding: 0;
  }
  
  html, body {
    height: 100%;
  }
  
  * {
    box-sizing: border-box;
  }

  .news {
    word-break: keep-all;
  }

/* as파일 */

  #close {
    border: none;
    background-color: transparent; 
    cursor: pointer;
    padding: 0; 
    font-size: inherit; 
    color: inherit; 
    text-decoration: none;
    background-color: black;
    color: #888888;
}

#as {
  margin: 0 0 10rem 8rem;
  width: 30rem;
  color: #B0C3BC;
}

#as strong {
  color: white;
}

#as a{
  text-decoration: none;
  color: white;
  background-color: rgba(0, 0, 0, 0);
}

/* as파일끝 */

  @media ( max-width: 1050px ) {

    nav {
      display: none;
    }

    aside {
      display: none;
    }

    header #banner img {
      width: 100%;
      margin: 0 auto;
    }

  }