#header {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  z-index: 9999;
  backdrop-filter: blur(15px);
}
.header_inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: rgba(123, 123, 123, 0.5);
}
.head_logo {
  font-style: 0.9rem;
  text-align: center;
  text-transform: uppercase; /* 영문 전부 대문자 변환 */
  line-height: 1;
}
.head_logo em {
  font-size: 12px;
  display: block;
}
/* .head_nav {
}
.head_nav ul {
} */
.head_nav ul li {
  display: inline-block;
}
.head_nav ul li a {
  font-size: 14px;
  text-transform: uppercase;
  padding: 14px;
  position: relative;
}
.head_nav ul li a::before {
  content: "";
  width: calc(100% - 28px); /* 가로줄 - 좌우패딩*/
  height: 1px;
  background-color: var(--black);
  position: absolute;
  bottom: 0;
  left: 14px;
  transform: scale(0);
  transition: transform 0.2s;
}
.head_nav ul li a:hover::before {
  transform: scale(1);
}
.header_nav_mobile {
  width: 40px;
  height: 40px;
  display: none;
  cursor: pointer;
}
.header_nav_mobile span {
  display: block;
  width: 40px;
  height: 2px;
  background-color: var(--black);
  margin-top: 19px;
  position: relative;
}
.header_nav_mobile span::before {
  content: "";
  width: 40px;
  height: 2px;
  background-color: var(--black);
  position: absolute;
  top: 6px; /* bar를 위로 */
  right: 0;
  transition: width 0.3s;
}
.header_nav_mobile span::after {
  content: "";
  width: 40px;
  height: 2px;
  background-color: var(--black);
  position: absolute;
  bottom: 6px; /* bar를 아래로 */
  left: 0;
  transition: width 0.3s;
}

@media (max-width: 800px) {
  .header_nav_mobile {
    display: block;
  }
  .head_nav {
    display: none;
  }
  .head_nav.show {
    display: block;
  }

  .head_nav.show ul {
    position: absolute;
    right: 0;
    top: 68px;
    background-color: rgba(123, 123, 123, 0.3);
    padding: 20px 8px 20px 20px;
  }
  .head_nav.show ul li {
    display: block;
    text-align: right;
  }
  .head_nav.show ul li a {
    display: inline-block;
    padding: 5px;
  }
  .head_nav.show + .header_nav_mobile span::before {
    width: 20px;
  }
  .head_nav.show + .header_nav_mobile span::after {
    width: 20px;
  }
}