:root {
  --font-stack: "Pretendard",
                "Pretendard JP",
                "Noto Sans SC",
                system-ui,
                -apple-system,
                BlinkMacSystemFont,
                "Segoe UI",
                sans-serif;

  --font-headline: "Barlow Semi Condensed",
                   system-ui,
                   -apple-system,
                   BlinkMacSystemFont,
                   "Segoe UI",
                   sans-serif;
}

.barlow-semi-condensed-regular {
  font-family: "Barlow Semi Condensed", sans-serif;
  font-weight: 400;
  font-style: normal;
}

.barlow-semi-condensed-bold {
  font-family: "Barlow Semi Condensed", sans-serif;
  font-weight: 700;
  font-style: normal;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: var(--text-md);
  line-height: var(--lh-md);
  color: #000;
  min-height: calc(var(--slide-count) * 100vh);
  overflow-x: hidden;
}

body .page-lang--ch {
  font-family: "Noto Sans SC", "Pretendard", "Pretendard JP", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;  
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  padding-bottom: calc(var(--space-md) * 1.25);
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 1000;
  width: calc(100vw - 40px);
}

.logo {
  font-weight: 600;
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo img {
  width: 50px;
  height: auto;
}

.page-nav {
  height: 100%;
  margin-left: auto;
  display: flex;
  gap: 8px;
  font-size: 20px;
  align-items: center;
}

.page-nav--mobile {
  display: none;
}

.page-nav--desktop {
  display: flex;
}

.page-nav a {
  color: inherit;
  position: relative;
  /*border: 2px solid black;*/
  padding: 4px 10px 6px;
  /*border-radius: 20px;*/
  text-decoration: none;
}

.page-nav a:hover {
  opacity: .9;
}

.page-nav a.is-active {
  /*background: #eee;*/
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-thickness: 1px;
  text-decoration-color: #888;
}

.language-controls {
  display: flex;
  justify-content: flex-start;
  flex-direction: column;
  gap: calc(var(--space-sm));
  z-index: 100;
  position: fixed;
  bottom: 90px;
  right: 40px;
}

.language-controls button{
  border: 1px solid rgba(0, 0, 0, 0.3);
  background: transparent;
  padding: 2px 4px;
  border-radius: 20px;
  margin-bottom: 2px;
  height: 28px;
  font-size: 9.5px;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0;
  cursor: pointer;
  margin: 8px 0px 0px 0px;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.language-controls button.is-active,
.page-nav button.is-active {
  background: #000;
  color: #fff;
  border-color: #000;
}

/* hide mobile lanuage buttons */

#mobile-language-controls {
  display: none;
} 


@media (max-width: 900px) {

  .page-header {
    justify-content: flex-start;
    gap: 12px;
    padding: 12px 16px;
    top: 0;
    left: 0;
    right: 0;
    width: auto;
    background: transparent;
  }

  .page-nav--desktop {
    display: none;
  }

  .page-nav--mobile {
    display: flex;
    position: fixed;
    top: 12px;
    right: 16px;
    width: 44px;
    height: 44px;
    margin-left: auto;
    flex-direction: column;
    align-items: flex-end;
    justify-content: flex-start;
    gap: 0;
    font-size: 16px;
    padding: 0;
    cursor: pointer;
    background: transparent;
    z-index: 1002;
    overflow: visible;
  }

  .page-nav--mobile .nav-toggle {
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    padding: 0;
    margin: 0;
    position: relative;
    cursor: pointer;
    z-index: 100000;
    overflow: visible; /* prevent the rotated "X" from being clipped */
  }

  .page-nav--mobile .nav-toggle::before,
  .page-nav--mobile .nav-toggle::after {
    content: "";
    position: absolute;
    left: 10px;
    width: 24px;
    height: 2px;
    background: #000;
    transition: transform 0.2s ease, opacity 0.2s ease, box-shadow 0.2s ease;
  }

  .page-nav--mobile .nav-toggle::before {
    top: 14px;
    box-shadow: 0 7px 0 #000, 0 14px 0 #000;
    transform-origin: center;
  }

  .page-nav--mobile .nav-toggle::after {
    top: 14px;
    opacity: 0;
    transform: translateY(0) rotate(0deg);
  }

  .page-nav--mobile .page-nav__items {
    display: none;
    position: fixed;
    inset: 0;
    padding: 72px 20px 32px;
    background: white;
    overflow: auto;
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
    z-index: 1001;
  }

  .page-nav--mobile .page-nav__items a{
    opacity: 1;
    pointer-events: auto;
    transform: none;
    transition: none;
    text-align: left;
    min-width: 140px;
    width: 100%;
    border-radius: 0px;
    padding: 4px 10px;    
  }

  /* language button */
  .language-buttons {
    display: flex;
    flex-direction: column;
    position: fixed;
    right: 18px;
    bottom: 60px;
  }

  .language-buttons button {
    display: block;
    min-width: auto;
    width: auto;
    margin: 8px 0px 0px;
    border: 1px solid black;
    background: white;
    border-radius: 20px;
    font-size: 11px;
    padding: 6px;
  }

  .page-nav--mobile .page-nav__items a {
    border: none;
    padding: 0px 0px 4px;
  }

  .page-nav__subnav-title {
    font-weight: 600;
    border-bottom: 2px solid black;
    padding-bottom: 12px;
  }

  .page-nav__subnav ul ul {
    padding-left: 20px;
  }

  .page-nav--mobile .page-nav__items a.is-active, li.is-active {
    font-weight: 600;
    text-decoration: none;
  }

  #sub-nav, .language-controls {
    display: none !important;
  }

  #mobile-language-controls, #mobile-language-controls .language-controls {
    display: flex !important;
  }

  .page-nav--mobile.is-open .page-nav__items {
    display: flex;
  }

  .page-nav--mobile.is-open {
    width: auto;
    height: auto;
  }

  .page-nav--mobile.is-open .nav-toggle::before {
    box-shadow: none;
    transform: translateY(7px) rotate(45deg);
  }

  .page-nav--mobile.is-open .nav-toggle::after {
    opacity: 1;
    transform: translateY(7px) rotate(-45deg);
  }

  .page-nav__subnav {
    width: 100%;
    padding-left: 12px;
  }

  .page-nav__subnav ul {
    list-style: none;
    padding: 0;
    margin: 12px 0 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .page-nav__subnav li a {
    display: block;
  }
}