html {
  font-size: 62.5%;
  color:  #1a1a1a;
  font-family: serif;
}

* {
  margin: 0;
  box-sizing: border-box;
}

:root{
  --header_height:70px;
  --top_color:rgb(79, 200, 145);
  --sub_color:rgb(89, 221, 165);
}

a {
  color:  #1a1a1a;
  text-decoration: none;
}

.container {
  max-width: 1170px;
  width: 100%;
  margin: 0 auto;
  padding: 0 2rem;
}

header {
  height: var(--header_height);
  width: 100%;
  background-color:rgba(0, 0, 0,.8);
  position: sticky;
  top: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
}

.header_grid{
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  height: calc(var(--header_height) - 1rem);
  border-left: solid 2px white;
}

.res_header_grid{
  display: none;
  grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
  height: calc(var(--header_height) - 1rem);
  border-left: solid 2px white;
  position: relative;
}

.header_grid a,.res_header_grid a{
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  color: white;
  font-size: 2rem;
  transition: all .3s ease-out;
  font-weight: bold;
  border-right: solid 2px white;
}

.header_grid a:hover,.res_header_grid a:hover{
  background-color: rgba(255,255,255,.4);
}

.column_list_a{
  position: absolute;
  right: 0;
  top: calc(100% + 1rem);
  visibility: hidden;
  max-height: 0;
  transition: all .3s ease-out;
  background-color:rgba(0, 0, 0,.8);
  padding: .5rem;
}

.column_list_a a{
  border-right: none;
  line-height: 2;
}

.column_list:hover+.column_list_a{
  visibility: visible;
  max-height: 1000px
}
.column_list_a:hover{
  visibility: visible;
  max-height: 1000px;
}

.serch_box p {
  font-size: 1.7rem;
}


footer{
  background-color:rgba(0, 0, 0,.8);
}
.footer_div{
  display: grid;
  grid-template-rows: 1fr 1fr 1fr;
  grid-template-columns: 1fr;
  grid-gap: 2rem;
  padding: 4rem 0 6rem 0;
}
.footer_div_a{
  display: flex;
  align-items: center;
}
.footer_div_a a{
  color: white;
  font-size: 1.8rem;
  transition: all .3s ease-out;
  border-bottom: solid 2px rgba(0,0,0,0);
  line-height: 1.5;
}

.footer_div_a a:hover{
  border-bottom: solid 2px white;
}

@media (max-width:1130px) {
  .res_header_grid{
    display: grid;
  }
  .header_grid{
    display: none;
  }

}

@media (max-width: 1024px){
  html {
    font-size: 59.027778%;
  }
}

@media (max-width: 768px){
  html {
    font-size: 55.555555%;
  }
}

@media (max-width: 425px){
  .container {
    padding: 0 1rem;
  }
  :root{
    --header_height:50px;
  }
  .header_grid a, .res_header_grid a {
    font-size: 1.7rem;
    border-right: solid 1px white;
  }
  .res_header_grid,.header_grid {
    border-left: solid 1px white;
  }

}

@media (max-width: 375px){
  html {
    font-size: 52.0833333%;
  }
}

@media (max-width: 320px){
  html {
    font-size: 48.61111%;
  }
}