body {
  margin: 0;
  font-size: 1.6rem;
  line-height: 1.5;
  padding-top: 8rem;
}

html {
  scroll-behavior: smooth;
  font-family: sans-serif;
  overflow-x: hidden;
  font-size: 62.5%;
}

header {
  position: fixed;
  top: 0;
  width: 100%;
  height: 6rem;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  z-index: 500;
}

footer {
  display: flex;
  justify-content: center;
}

main {
  margin-top: 8rem;
}

section {
  scroll-margin-top: 6rem;
  height: 80rem;
  padding: 2rem;
  border-bottom: 1px solid #eee;
}

/*class*/
.drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(15px);
  z-index: 150;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.4s,
    visibility 0.4s;
}

.drawer.is-active {
  opacity: 1;
  visibility: visible;
}

.drawer-list {
  list-style: none;
  padding: 0;
  text-align: center;
}

.drawer-item {
  margin: 3rem 0;
  transform: translateX(-30px);
  opacity: 0;
  transition:
    transform 0.4s,
    opacity 0.4s;
}

.drawer.is-active .drawer-item {
  transform: translateX(0);
  opacity: 1;
}

.drawer-item:nth-child(1) {
  transition-delay: 0.1s;
}
.drawer-item:nth-child(2) {
  transition-delay: 0.2s;
}
.drawer-item:nth-child(3) {
  transition-delay: 0.3s;
}
.drawer-item:nth-child(4) {
  transition-delay: 0.4s;
}
.drawer-item:nth-child(5) {
  transition-delay: 0.5s;
}

.drawer-item a {
  text-decoration: none;
  color: #333;
  font-size: 2rem;
  font-weight: bold;
  letter-spacing: 0.1em;
  transition: color 0.3s;
}

.drawer-item a:hover {
  color: #39ff14;
}

.hamburger {
  display: none;
  position: relative;
  width: 3rem;
  height: 2.4rem;
  margin: 1rem;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 200;
}

.hamburger span {
  display: block;
  position: absolute;
  width: 100%;
  height: 0.2rem;
  background-color: #333;
  transition:
    transform 0.3s,
    opacity 0.3s,
    background-color 0.3s,
    box-shadow 0.3s;
}

.hamburger:hover span {
  background-color: #39ff14;
  box-shadow: 0 0 10px #39ff14;
}

.hamburger span:nth-child(1) {
  top: 0;
}
.hamburger span:nth-child(2) {
  top: 50%;
  transform: translateY(-50%);
}
.hamburger span:nth-child(3) {
  bottom: 0;
}

.hamburger.is-active span:nth-child(1) {
  transform: translateY(11px) rotate(45deg);
}
.hamburger.is-active span:nth-child(2) {
  opacity: 0;
}
.hamburger.is-active span:nth-child(3) {
  transform: translateY(-11px) rotate(-45deg);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 120rem;
  margin: 0 auto;
  padding: 1rem 2rem;
}

.menu-item {
  position: relative;
  display: flex;
  align-items: center;
}

.menu-item::after {
  content: "";
  width: 0.1rem;
  height: 1.4rem;
  background-color: rgba(0, 0, 0, 0.15);
  margin: 0 1.5rem;
}

.menu-item:last-child::after {
  display: none;
}

.menu-item a {
  text-decoration: none;
  color: #333;
  font-size: 1.4rem;
  font-weight: 500;
}

.nav-list {
  display: flex;
  justify-content: flex-end;
  margin-right: 1rem;
}

@media (max-width: 768px) {
  body {
    padding-top: 6rem;
  }
  .nav-container.pc-nav {
    display: none;
  }
  .hamburger {
    display: block;
    margin-left: auto;
  }
}