/* ---------- Nav ---------- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px clamp(20px, 5vw, 56px);
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  mix-blend-mode: difference;
  color: var(--cream);
  pointer-events: auto;
}

nav.menu-open {
  mix-blend-mode: normal;
  background: rgba(20, 18, 15, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--hair-dark);
}

nav .mark {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 15px;
  color: var(--cream);
  z-index: 105;
}

nav .links {
  display: flex;
  gap: 28px;
  font-size: 14px;
}

nav .links a {
  color: var(--cream);
  opacity: 0.8;
  transition: opacity 0.2s, color 0.2s;
}

nav .links a:hover {
  opacity: 1;
}

nav a:focus-visible,
.nav-toggle:focus-visible {
  outline: 2px solid #FFFFFF;
  outline-offset: 4px;
  border-radius: 2px;
  opacity: 1;
}

/* Mobile Nav Toggle Button (Hidden on Desktop & Tablet > 640px) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  z-index: 105;
  color: var(--cream);
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--cream);
  border-radius: 1px;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
}

nav.menu-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
}

nav.menu-open .nav-toggle-bar:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
}

@media (max-width: 640px) {
  nav {
    padding: 16px clamp(16px, 4vw, 24px);
  }

  .nav-toggle {
    display: flex;
  }

  nav .links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background: #14120F;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: clamp(32px, 8vh, 64px) clamp(24px, 6vw, 40px);
    gap: 20px;
    z-index: 102;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease, visibility 0.32s;
  }

  nav.menu-open .links {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  nav .links a {
    font-size: 26px;
    font-family: 'Big Shoulders Display', sans-serif;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--cream);
    opacity: 0.9;
    padding: 12px 0;
    width: 100%;
    min-height: 48px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--hair-dark);
  }

  nav .links a:hover,
  nav .links a:focus-visible {
    color: var(--violet);
    opacity: 1;
    padding-left: 8px;
  }
}