@charset "UTF-8";

/* ========================================
   Header
======================================== */

.header {
  position: fixed;
  z-index: 1000;
  top: 0;
  left: 0;

  width: 100%;
  height: var(--header-height);

  background-color: var(--color-header-background);

  transition:
    background-color var(--transition-default),
    box-shadow var(--transition-default),
    backdrop-filter var(--transition-default);
}

.header.is-scrolled {
  background-color: var(--color-header-scroll-background);
  box-shadow: 0 0.125rem 0.5rem rgba(0, 0, 0, 0.08);

  backdrop-filter: blur(0.75rem);
  -webkit-backdrop-filter: blur(0.75rem);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;

  height: 100%;
}

.header-logo {
  position: relative;
  z-index: 2;

  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
}

.header-logo-image {
  width: 5.0625rem;
  height: auto;
}

.header-navigation {
  display: block;
}

.header-menu {
  display: flex;
  align-items: center;
  gap: 3.25rem;
}

.header-menu-link {
  position: relative;

  display: block;
  padding-block: 0.5rem;

  font-family: var(--font-chosun-centennial);
  font-size: 1.125rem;
  font-weight: var(--font-weight-regular);
  line-height: 1.4;
  color: var(--color-text-primary);

  transition: color var(--transition-default);
}

.header-menu-link::after {
  position: absolute;
  bottom: 0;
  left: 0;

  width: 100%;
  height: 0.0625rem;

  background-color: currentColor;
  content: "";

  opacity: 0;
  transform: scaleX(0);
  transform-origin: center;

  transition:
    opacity var(--transition-default),
    transform var(--transition-default);
}

.header-menu-link:hover,
.header-menu-link:focus-visible,
.header-menu-link[aria-current="page"] {
  color: var(--color-text-secondary);
}

.header-menu-link:hover::after,
.header-menu-link:focus-visible::after,
.header-menu-link[aria-current="page"]::after {
  opacity: 1;
  transform: scaleX(1);
}

/* ========================================
   Mobile Menu Button
======================================== */

.header-menu-button {
  position: relative;
  z-index: 2;

  display: none;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;

  width: 3.125rem;
  height: 3.125rem;
  padding: 0;
}

.header-menu-button-line {
  position: absolute;

  width: 1.5rem;
  height: 0.125rem;

  background-color: var(--color-gray-800);
  border-radius: 62.4375rem;

  transition:
    top var(--transition-default),
    opacity var(--transition-fast),
    transform var(--transition-default);
}

.header-menu-button-line:nth-child(1) {
  top: 1.0625rem;
}

.header-menu-button-line:nth-child(2) {
  top: 1.5rem;
}

.header-menu-button-line:nth-child(3) {
  top: 1.9375rem;
}

.header-menu-button.is-active .header-menu-button-line:nth-child(1) {
  top: 1.5rem;
  transform: rotate(45deg);
}

.header-menu-button.is-active .header-menu-button-line:nth-child(2) {
  opacity: 0;
}

.header-menu-button.is-active .header-menu-button-line:nth-child(3) {
  top: 1.5rem;
  transform: rotate(-45deg);
}

/* ========================================
   Mobile Menu
======================================== */

.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;

  display: none;
  width: 100%;
  padding: 3.75rem 4.6875rem;

  visibility: hidden;
  opacity: 0;
  overflow: hidden;

  background-color: var(--color-mobile-menu-background);
  box-shadow: 0 0.25rem 0.625rem rgba(0, 0, 0, 0.06);

  transform: translateY(-1rem);
  pointer-events: none;

  backdrop-filter: blur(0.75rem);
  -webkit-backdrop-filter: blur(0.75rem);

  transition:
    visibility var(--transition-default),
    opacity var(--transition-default),
    transform var(--transition-default);
}

.mobile-menu.is-open {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.mobile-menu-list {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3.125rem;
}

.mobile-menu-link {
  position: relative;

  display: inline-block;
  padding-bottom: 0.5rem;

  font-family: var(--font-chosun-centennial);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text-primary);
}

.mobile-menu-link[aria-current="page"] {
  color: var(--color-text-secondary);
}

/* ========================================
   Tablet
======================================== */

@media (max-width: 64rem) {
  .header-menu-link {
    font-size: 1rem;
  }
}

/* ========================================
   Mobile
======================================== */

@media (max-width: 47.9375rem) {
  .header-logo-image {
    width: 3.625rem;
  }

  .header-navigation {
    display: none;
  }

  .header-menu-button {
    display: inline-flex;
  }

  .mobile-menu {
    display: block;
  }
}