/* ═══════════════════════════════════════════
   nav.css — Navigation
═══════════════════════════════════════════ */

#site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.1rem 3rem;
  transition: background var(--mid), backdrop-filter var(--mid), border-color var(--mid);
  border-bottom: 1px solid transparent;
}

#site-nav.scrolled {
  background: rgba(2, 8, 16, 0.9);
  backdrop-filter: blur(16px) saturate(150%);
  border-color: var(--c-deep);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  flex-shrink: 0;
}

/* ── SVG logomark ── */
.brand-sigil {
  flex-shrink: 0;
  display: block;
  overflow: visible;
}

.brand-orbit {
  transform-origin: 18px 18px;
  animation: brand-orbit-spin 20s linear infinite;
}

@keyframes brand-orbit-spin {
  to { transform: rotate(360deg); }
}

.brand-dot {
  transform-origin: 18px 18px;
  animation: brand-orbit-spin 20s linear infinite;
}

.nav-brand:hover .brand-orbit {
  animation-duration: 5s;
  stroke-opacity: 0.65;
}

.nav-brand:hover .brand-dot {
  animation-duration: 5s;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-mist);
  transition: color var(--fast);
}

.nav-brand:hover .brand-name {
  color: var(--c-biolume-soft);
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-left: auto;
}

.nav-links li {
  display: flex;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-star);    /* was c-mist — better legibility */
  text-decoration: none;
  position: relative;
  padding-bottom: 2px;
  transition: color var(--fast), opacity var(--fast), border-color var(--fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--c-biolume);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--mid) var(--ease);
}

.nav-links a:hover {
  color: var(--c-biolume-soft);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-resume {
  border: 1px solid var(--c-deep) !important;
  padding: 0.35rem 0.85rem !important;
  border-radius: var(--radius);
}

.nav-resume:hover {
  border-color: var(--c-biolume) !important;
}

/* Back link */
.nav-back-item {
  display: flex;
  align-items: center;
}

.nav-back {
  margin-left: 0.75rem;
  padding-left: 1rem;
  border-left: 1px solid var(--c-deep);
  opacity: 0.78;
}

.nav-back:hover {
  opacity: 1;
}

/* Mobile burger */
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: none;
  padding: 4px;
  margin-left: auto;
}

.nav-burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--c-mist);
  transition: all var(--mid);
}

@media (max-width: 720px) {
  #site-nav {
    padding: 1rem 1.5rem;
  }

  .nav-inner {
    justify-content: space-between;
    gap: 1rem;
  }

  .nav-burger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    bottom: 0;
    width: min(260px, 75vw);
    margin-left: 0;
    background: var(--c-abyss);
    border-left: 1px solid var(--c-deep);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 1.4rem;
    padding: 5.5rem 1.5rem 1.5rem;
    transition: right var(--mid) var(--ease);
    z-index: 200;
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    width: 100%;
    padding-bottom: 0.2rem;
  }

  .nav-back-item {
    margin-top: auto;
    width: 100%;
  }

  .nav-back {
    margin-left: 0;
    padding-left: 0;
    padding-top: 1rem;
    border-left: none;
    border-top: 1px solid var(--c-deep);
    opacity: 1;
  }
}