.page {
  padding-top: clamp(6.75rem, 12vw, 8rem);
}

body.is-menu-open {
  overflow: hidden;
}

.hdr {
  position: fixed;
  top: var(--sp-4);
  right: 0;
  left: 0;
  z-index: var(--z-nav);
  pointer-events: none;
}

.nav {
  position: relative;
  display: flex;
  min-height: 4.5rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 0.85rem 0.7rem 1rem;
  pointer-events: auto;
  background:
    linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.07),
      rgba(255, 255, 255, 0.018)
    ),
    rgba(23, 28, 35, 0.78);
  border: 1px solid rgba(217, 240, 246, 0.12);
  border-radius: var(--r-pill);
  box-shadow: var(--sh-md);
  backdrop-filter: blur(18px) saturate(130%);
  transition:
    min-height var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.hdr.is-scrolled .nav {
  min-height: 4rem;
  background:
    linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.055),
      rgba(255, 255, 255, 0.012)
    ),
    rgba(23, 28, 35, 0.92);
  border-color: rgba(217, 240, 246, 0.18);
  box-shadow: var(--sh-lg);
}

.nav__brand {
  display: inline-flex;
  gap: var(--sp-3);
  align-items: center;
  color: var(--c-text);
  border-radius: var(--r-pill);
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-title);
  line-height: 1;
  text-decoration: none;
}

.nav__brand:hover {
  color: var(--c-text);
}

.nav__mark,
.ftr__mark {
  display: inline-grid;
  width: 2.35rem;
  height: 2.35rem;
  place-items: center;
  overflow: hidden;
  color: var(--c-bg-deep);
  background: var(--g-main);
  border-radius: 50%;
  box-shadow:
    0 0.6rem 1.5rem rgba(0, 166, 214, 0.23),
    inset 0 1px rgba(255, 255, 255, 0.38);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: var(--fw-extrabold);
  letter-spacing: 0.02em;
}

.nav__mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.nav__panel {
  display: flex;
  align-items: center;
}

.nav__links {
  display: flex;
  gap: clamp(0.2rem, 1vw, 0.7rem);
  align-items: center;
}

.nav__link {
  position: relative;
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  padding-inline: clamp(0.75rem, 1.4vw, 1.05rem);
  color: var(--c-text-soft);
  border-radius: var(--r-pill);
  font-size: var(--fs-200);
  font-weight: var(--fw-semibold);
  text-decoration: none;
  transition:
    color var(--dur-fast) var(--ease-soft),
    background-color var(--dur-fast) var(--ease-soft);
}

.nav__link::after {
  position: absolute;
  right: 50%;
  bottom: 0.35rem;
  left: 50%;
  height: 2px;
  content: "";
  background: var(--g-main);
  border-radius: var(--r-pill);
  box-shadow: 0 0 0.75rem rgba(0, 166, 214, 0.58);
  transition:
    right var(--dur) var(--ease),
    left var(--dur) var(--ease);
}

.nav__link:hover,
.nav__link[aria-current="page"] {
  color: var(--c-text);
  background: rgba(255, 255, 255, 0.035);
}

.nav__link:hover::after,
.nav__link[aria-current="page"]::after {
  right: 1rem;
  left: 1rem;
}

.nav__toggle {
  display: none;
  width: 3rem;
  height: 3rem;
  place-items: center;
  color: var(--c-text);
  background: rgba(255, 255, 255, 0.045);
  border: var(--bd);
  border-radius: 50%;
  cursor: pointer;
}

.nav__toggle-lines {
  position: relative;
  display: block;
  width: 1.25rem;
  height: 0.9rem;
}

.nav__toggle-lines span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: var(--r-pill);
  transition:
    top var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.nav__toggle-lines span:first-child {
  top: 0.15rem;
}

.nav__toggle-lines span:last-child {
  top: 0.67rem;
}

.nav.is-open .nav__toggle-lines span:first-child {
  top: 0.42rem;
  transform: rotate(45deg);
}

.nav.is-open .nav__toggle-lines span:last-child {
  top: 0.42rem;
  transform: rotate(-45deg);
}

.nav__veil {
  position: fixed;
  inset: calc(var(--sp-4) * -1);
  pointer-events: none;
  visibility: hidden;
  opacity: 0;
  background: rgba(10, 14, 18, 0.68);
  backdrop-filter: blur(6px);
  transition:
    visibility var(--dur) var(--ease-soft),
    opacity var(--dur) var(--ease-soft);
}

@media (max-width: 48rem) {
  .nav {
    min-height: 4.25rem;
    padding: 0.55rem 0.6rem 0.55rem 0.8rem;
  }

  .nav__name {
    font-size: var(--fs-200);
  }

  .nav__mark {
    width: 2.2rem;
    height: 2.2rem;
  }

  .nav__toggle {
    display: grid;
  }

  .nav__panel {
    position: fixed;
    top: 5.8rem;
    right: var(--page-pad);
    left: var(--page-pad);
    display: grid;
    padding: var(--sp-4);
    visibility: hidden;
    opacity: 0;
    background:
      var(--g-surface),
      rgba(31, 37, 46, 0.97);
    border: var(--bd-strong);
    border-radius: var(--r-xl);
    box-shadow: var(--sh-lg), var(--sh-glow);
    transform: translateY(-0.75rem) scale(0.985);
    transform-origin: top center;
    transition:
      visibility var(--dur) var(--ease-soft),
      opacity var(--dur) var(--ease-soft),
      transform var(--dur) var(--ease);
  }

  .nav.is-open .nav__panel {
    visibility: visible;
    opacity: 1;
    transform: translateY(0) scale(1);
  }

  .nav__links {
    display: grid;
    gap: var(--sp-2);
  }

  .nav__link {
    min-height: 3.65rem;
    justify-content: space-between;
    padding-inline: var(--sp-5);
    border: 1px solid transparent;
    border-radius: var(--r-lg);
    font-size: var(--fs-300);
  }

  .nav__link::after {
    display: none;
  }

  .nav__link:hover,
  .nav__link[aria-current="page"] {
    border-color: var(--c-main-line);
    background: var(--c-main-fade);
  }

  body.is-menu-open .nav__veil {
    pointer-events: auto;
    visibility: visible;
    opacity: 1;
  }
}

@media (max-width: 24rem) {
  .nav__name {
    display: none;
  }
}