:root {
  color-scheme: light;
  --color-background: #ffffff;
  --color-surface: #f5f6f6;
  --color-surface-strong: #ebeeee;
  --color-line: #d9dede;
  --color-ink: #111111;
  --color-muted: #626867;
  --color-on-dark: #ffffff;
  --header-gutter: clamp(1rem, 3.3vw, 4rem);
  --header-top: clamp(1rem, 2.6vw, 2rem);
  background: var(--color-background);
  color: var(--color-ink);
  font-family:
    Pretendard, SUIT, "Noto Sans KR", -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

html {
  background: var(--color-background);
  text-rendering: geometricPrecision;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  background: var(--color-background);
}

button,
a {
  color: inherit;
  font: inherit;
}

a {
  text-decoration: none;
}

.site-header {
  position: fixed;
  z-index: 100;
  top: var(--header-top);
  right: var(--header-gutter);
  left: var(--header-gutter);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  pointer-events: none;
}

.brand,
.primary-navigation,
.portal-link,
.menu-toggle {
  pointer-events: auto;
}

.brand {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 0.7rem;
  font-size: 0.92rem;
  font-weight: 720;
  letter-spacing: 0.055em;
}

.brand-mark {
  display: grid;
  width: 2.35rem;
  height: 2.35rem;
  place-items: center;
  border: 1px solid var(--color-line);
  border-radius: 50%;
  background: rgb(255 255 255 / 88%);
  font-size: 0.67rem;
  letter-spacing: -0.05em;
  transition:
    color 220ms ease,
    background-color 220ms ease,
    transform 450ms cubic-bezier(0.16, 1, 0.3, 1);
}

.brand:hover .brand-mark {
  background: var(--color-ink);
  color: var(--color-on-dark);
  transform: rotate(-8deg);
}

.primary-navigation {
  --pointer-x: 50%;
  position: relative;
  display: flex;
  grid-column: 2;
  align-items: center;
  gap: 0.12rem;
  padding: 0.38rem;
  border: 1px solid rgb(17 17 17 / 7%);
  border-radius: 999px;
  background:
    radial-gradient(
      circle at var(--pointer-x) 0%,
      rgb(255 255 255 / 100%),
      transparent 9rem
    ),
    rgb(245 246 246 / 94%);
  box-shadow:
    0 1rem 2.6rem -1.6rem rgb(20 28 27 / 38%),
    inset 0 1px 0 rgb(255 255 255 / 92%);
  isolation: isolate;
  transition:
    background-color 240ms ease,
    box-shadow 240ms ease,
    transform 500ms cubic-bezier(0.16, 1, 0.3, 1);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.primary-navigation:hover {
  box-shadow:
    0 1.25rem 3rem -1.45rem rgb(20 28 27 / 46%),
    inset 0 1px 0 rgb(255 255 255 / 100%);
  transform: translateY(-2px);
}

.nav-link {
  position: relative;
  display: grid;
  min-height: 2.55rem;
  align-items: center;
  overflow: hidden;
  padding: 0 0.92rem;
  border-radius: 999px;
  color: var(--color-ink);
  font-size: 0.81rem;
  font-weight: 630;
  letter-spacing: -0.015em;
  outline: none;
  transition:
    color 180ms ease,
    background-color 180ms ease,
    transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  border-radius: inherit;
  background: var(--color-surface-strong);
  content: "";
  opacity: 0;
  transform: scale(0.82);
  transition:
    opacity 180ms ease,
    transform 360ms cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link:hover::before,
.nav-link:focus-visible::before,
.nav-link[aria-current="page"]::before {
  opacity: 1;
  transform: scale(1);
}

.nav-label {
  position: relative;
  display: block;
  line-height: 1;
  transition: transform 430ms cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-label::after {
  position: absolute;
  top: calc(100% + 1.15rem);
  left: 0;
  width: 100%;
  content: attr(data-label);
  text-align: center;
}

.nav-link:hover .nav-label,
.nav-link:focus-visible .nav-label {
  transform: translateY(calc(-100% - 1.15rem));
}

.nav-link-strong {
  min-width: 5.7rem;
  margin-left: 0.15rem;
  background: var(--color-ink);
  color: var(--color-on-dark);
}

.nav-link-strong::before {
  background: #303433;
}

.portal-link {
  display: inline-flex;
  grid-column: 3;
  justify-self: end;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 0.95rem;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: rgb(255 255 255 / 82%);
  color: var(--color-muted);
  font-size: 0.74rem;
  font-weight: 650;
  transition:
    color 180ms ease,
    border-color 180ms ease,
    transform 350ms cubic-bezier(0.16, 1, 0.3, 1);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.portal-link:hover,
.portal-link:focus-visible {
  border-color: #aeb5b4;
  color: var(--color-ink);
  transform: translateY(-2px);
}

.portal-status {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: #789187;
  box-shadow: 0 0 0 0.22rem rgb(120 145 135 / 13%);
}

.menu-toggle {
  display: none;
}

.about-page {
  min-height: 100svh;
  background: var(--color-background);
}

@media (max-width: 74rem) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .brand-name {
    display: none;
  }

  .primary-navigation {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: center;
  }

  .portal-link {
    grid-column: 2;
  }
}

@media (max-width: 48rem) {
  .site-header {
    top: 0.85rem;
    right: 0.85rem;
    left: 0.85rem;
    grid-template-columns: 1fr auto;
  }

  .brand-mark {
    width: 2.65rem;
    height: 2.65rem;
    background: var(--color-surface);
  }

  .portal-link {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
    grid-column: 2;
    align-items: center;
    gap: 0.65rem;
    min-height: 2.65rem;
    padding: 0 1rem;
    border: 1px solid rgb(17 17 17 / 8%);
    border-radius: 999px;
    background: var(--color-surface);
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 680;
  }

  .menu-toggle-icon {
    position: relative;
    width: 0.9rem;
    height: 0.55rem;
  }

  .menu-toggle-icon::before,
  .menu-toggle-icon::after {
    position: absolute;
    left: 0;
    width: 100%;
    height: 1px;
    background: currentColor;
    content: "";
    transition:
      top 280ms ease,
      transform 280ms ease;
  }

  .menu-toggle-icon::before {
    top: 0;
  }

  .menu-toggle-icon::after {
    top: 0.5rem;
  }

  .menu-toggle[aria-expanded="true"] .menu-toggle-icon::before {
    top: 0.25rem;
    transform: rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] .menu-toggle-icon::after {
    top: 0.25rem;
    transform: rotate(-45deg);
  }

  .primary-navigation {
    position: relative;
    top: auto;
    right: auto;
    left: auto;
    display: grid;
    width: 100%;
    max-height: 0;
    grid-template-columns: 1fr 1fr;
    grid-column: 1 / -1;
    grid-row: 2;
    gap: 0.3rem;
    justify-self: stretch;
    overflow: hidden;
    margin-top: 0;
    padding: 0 0.55rem;
    border-color: transparent;
    border-radius: 1.55rem;
    background: rgb(245 246 246 / 98%);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-0.7rem) scale(0.97);
    transform-origin: top right;
    transition:
      max-height 420ms cubic-bezier(0.16, 1, 0.3, 1),
      margin-top 420ms cubic-bezier(0.16, 1, 0.3, 1),
      padding 420ms cubic-bezier(0.16, 1, 0.3, 1),
      opacity 220ms ease,
      transform 420ms cubic-bezier(0.16, 1, 0.3, 1);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .site-header[data-menu-open="true"] .primary-navigation {
    max-height: 14rem;
    margin-top: 0.65rem;
    padding: 0.55rem;
    border-color: rgb(17 17 17 / 7%);
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }

  .primary-navigation:hover {
    transform: translateY(0) scale(1);
  }

  .nav-link {
    justify-items: center;
    min-height: 3.1rem;
    font-size: 0.86rem;
  }

  .nav-link-strong {
    min-width: 0;
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}