:root { --nav-h: 72px; }
html { scroll-padding-top: var(--nav-h); }

.site-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 500;
  height: var(--nav-h);
  color: var(--color-paper);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease, transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  animation: navIn 0.6s ease 0.4s backwards;
}
.site-nav.is-scrolled,
.site-nav.is-open {
  background: rgba(13, 13, 13, 0.82);
  border-bottom-color: rgba(255, 255, 255, 0.1);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
@keyframes navIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding-inline: var(--side-padding-mobile, 20px);
}

.site-nav__links { display: flex; align-items: center; gap: 32px; list-style: none; margin: 0; padding: 0; }
.site-nav__link {
  position: relative;
  padding: 6px 0;
  font-size: var(--fs-small);
  font-weight: var(--weight-bold, 700);
  color: var(--color-chimney, #8a8a8a);
  transition: color 0.25s ease;
}
.site-nav__link::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: currentColor;
  transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease;
}
.site-nav__link:hover, .site-nav__link[aria-current="page"] { color: var(--color-paper); }
.site-nav__link:hover::after, .site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.site-nav :focus-visible { outline: 2px solid var(--color-green); outline-offset: 4px; }

.site-nav__item--sub { position: relative; display: flex; align-items: center; gap: 4px; }
.site-nav__subtoggle {
  display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; padding: 0;
  color: var(--color-chimney, #8a8a8a); background: none; border: 0; transition: color 0.25s ease, transform 0.3s ease;
}
.site-nav__subtoggle svg { width: 10px; height: 6px; }
.site-nav__item--sub:hover .site-nav__subtoggle,
.site-nav__item--sub.is-sub-open .site-nav__subtoggle { color: var(--color-paper); }
.site-nav__item--sub.is-sub-open .site-nav__subtoggle { transform: rotate(180deg); }
.site-nav__sub {
  position: absolute; top: calc(100% + 14px); left: 50%; min-width: 220px; margin: 0; padding: 8px; list-style: none;
  background: rgba(13, 13, 13, 0.94); border: 1px solid rgba(255, 255, 255, 0.12); border-radius: var(--radius-sm, 8px);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  opacity: 0; visibility: hidden; transform: translate(-50%, -6px);
  transition: opacity 0.2s ease, transform 0.25s ease, visibility 0s linear 0.25s;
}
.site-nav__sub::before { content: ''; position: absolute; left: 0; right: 0; top: -16px; height: 16px; }
.site-nav__item--sub.is-sub-open .site-nav__sub,
.site-nav__item--sub:focus-within .site-nav__sub {
  opacity: 1; visibility: visible; transform: translate(-50%, 0); transition: opacity 0.2s ease, transform 0.25s ease;
}
@media (hover: hover) and (pointer: fine) {
  .site-nav__item--sub:hover .site-nav__sub { opacity: 1; visibility: visible; transform: translate(-50%, 0); transition: opacity 0.2s ease, transform 0.25s ease; }
}
.site-nav__sublink {
  display: block; padding: 10px 12px; border-radius: 4px; font-size: var(--fs-small); font-weight: var(--weight-bold, 700);
  color: var(--color-chimney, #8a8a8a); white-space: nowrap; transition: color 0.2s ease, background-color 0.2s ease;
}
.site-nav__sublink:hover, .site-nav__sublink:focus-visible { color: var(--color-paper); background: rgba(255, 255, 255, 0.06); }
.site-nav__sublink[aria-current="page"] { color: var(--color-paper); }
.site-nav__sublink[aria-current="page"]::before {
  content: ''; display: inline-block; width: 6px; height: 6px; margin-right: 8px; border-radius: 50%; background: var(--color-green); vertical-align: 2px;
}

.site-nav__toggle { display: none; }
.site-nav__home,
.site-nav__panel { display: none; }
.site-nav.is-open { background: #0d0d0d; }
.site-nav.is-hidden { transform: translateY(-100%); }

@media (max-width: 720px) {
  :root { --nav-h: 56px; }
  .site-nav__inner { justify-content: space-between; }
  .site-nav__links { display: none; }

  .site-nav__home {
    display: block; width: 30px; height: 24px; background: currentColor;
    -webkit-mask: url('../assets/svg/logomark.svg') center / contain no-repeat;
    mask: url('../assets/svg/logomark.svg') center / contain no-repeat;
  }
  .site-nav__toggle {
    display: inline-flex; flex-direction: column; justify-content: center; gap: 5px; width: 44px; height: 44px; margin-right: -10px;
    padding: 0 10px; color: inherit; background: none; border: 0;
  }
  .site-nav__toggle span { display: block; height: 2px; background: currentColor; border-radius: 2px; transition: transform 0.25s ease, opacity 0.2s ease; }
  .site-nav.is-open .site-nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .site-nav.is-open .site-nav__toggle span:nth-child(2) { opacity: 0; }
  .site-nav.is-open .site-nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .site-nav.is-open { border-bottom-color: transparent; -webkit-backdrop-filter: none; backdrop-filter: none; }

  .site-nav__panel {
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    display: flex; flex-direction: column; gap: 40px;
    height: calc(100dvh - var(--nav-h)); overflow-y: auto; overscroll-behavior: contain;
    padding: 32px var(--side-padding-mobile, 20px) calc(24px + env(safe-area-inset-bottom));
    background: #0d0d0d;
    visibility: hidden; opacity: 0;
    transition: opacity 0.3s ease, visibility 0s linear 0.3s;
  }
  .site-nav.is-open .site-nav__panel { visibility: visible; opacity: 1; transition: opacity 0.3s ease; }

  .site-nav__menu { display: flex; flex-direction: column; gap: 4px; margin: 0; padding: 0; list-style: none; }
  .site-nav__big {
    display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding: 4px 0;
    font-family: var(--font-heading); font-size: clamp(2.5rem, 12vw, 3.25rem); font-weight: var(--weight-bold, 700);
    line-height: 1.1; letter-spacing: -0.02em; color: var(--color-muted, #a6a6a6);
    transform: translateY(16px); opacity: 0;
    transition: color 0.25s ease, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
  }
  .site-nav__big[aria-current="page"], .site-nav__big:active { color: var(--color-paper); }
  .site-nav.is-open .site-nav__big { transform: none; opacity: 1; }
  .site-nav.is-open .site-nav__menu li:nth-child(2) .site-nav__big { transition-delay: 0.05s; }
  .site-nav.is-open .site-nav__menu li:nth-child(3) .site-nav__big { transition-delay: 0.1s; }
  .site-nav.is-open .site-nav__menu li:nth-child(4) .site-nav__big { transition-delay: 0.15s; }
  .site-nav__subs { display: flex; flex-direction: column; gap: 2px; margin: 2px 0 10px; padding: 0 0 0 4px; list-style: none; }
  .site-nav__subbig {
    display: block; padding: 6px 0; font-size: 1.125rem; font-weight: var(--weight-bold, 700); color: var(--color-muted, #a6a6a6);
    transform: translateY(16px); opacity: 0; transition: color 0.25s ease, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1) 0.08s, opacity 0.4s ease 0.08s;
  }
  .site-nav.is-open .site-nav__subbig { transform: none; opacity: 1; }
  .site-nav__subbig[aria-current="page"], .site-nav__subbig:active { color: var(--color-paper); }
  .site-nav__count { font-size: var(--fs-small); font-weight: var(--weight-regular, 400); letter-spacing: 0; color: var(--color-muted, #a6a6a6); }
  .site-nav__count:empty { display: none; }

  .site-nav__about { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; margin-top: auto; }
  .site-nav__status { display: flex; align-items: center; gap: 10px; margin: 0; font-size: var(--fs-small); color: var(--color-muted, #a6a6a6); }
  .site-nav__dot { width: 8px; height: 8px; flex: none; border-radius: 50%; background: var(--color-green); }
  .site-nav__mail { font-size: 1.125rem; color: var(--color-paper); text-decoration: underline; text-decoration-color: rgba(255, 255, 255, 0.3); text-underline-offset: 4px; }
  .site-nav__tagline { margin: 8px 0 0; padding-top: 16px; width: 100%; font-size: var(--fs-small); color: var(--color-muted, #a6a6a6); border-top: 1px solid rgba(255, 255, 255, 0.1); }
}
html.has-open-menu, html.has-open-menu body { overflow: hidden; }
@media (prefers-reduced-motion: reduce) { .site-nav__big { transform: none !important; } }
@media (prefers-reduced-motion: reduce) { .site-nav { animation: none; } .site-nav * { transition: none !important; } }

.site-nav.is-static { animation: none; }