.bottomNav {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: min(var(--shell-w), 100vw);
  height: calc(var(--nav-h) + env(safe-area-inset-bottom));
  background: var(--bg-nav);
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--sp-s);
  padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
  backdrop-filter: blur(var(--blur-nav));
  -webkit-backdrop-filter: blur(var(--blur-nav));
  z-index: 10;
}

.navItem {
  min-height: 56px;
  padding: var(--sp-xs);
  background: transparent;
  border-color: transparent;
  color: var(--text-tertiary);
  display: grid;
  grid-template-rows: auto auto;
  gap: 2px;
  place-items: center;
  border-radius: var(--r-md);
}

.navItem__icon {
  display: inline-flex;
  align-items: center;
}

.navItem__label {
  font-size: var(--fs-11);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
}

.navItem:hover,
.navItem:focus-visible {
  color: var(--text-primary);
  background: transparent;
}

.navItem.is-active {
  color: var(--accent-primary);
}

.navItem--shutter {
  background: transparent;
  border: none;
  padding: 0;
  align-self: center;
  justify-self: center;
  grid-template-rows: 1fr;
}

.shutter {
  position: relative;
  width: 60px;
  height: 60px;
  display: inline-block;
}

.shutter__ring {
  position: absolute;
  inset: 0;
  border-radius: var(--r-pill);
  border: 2.5px solid #ffffff;
  box-sizing: border-box;
}

.shutter__inner {
  position: absolute;
  inset: 9px;
  border-radius: var(--r-pill);
  background: var(--accent-primary);
  box-shadow: 0 0 14px rgba(167, 139, 250, 0.35);
  transition: background 0.15s ease, transform 0.15s ease;
}

.navItem--shutter:hover .shutter__inner,
.navItem--shutter:focus-visible .shutter__inner {
  background: var(--accent-primary-2);
}

.navItem--shutter:active .shutter__inner {
  transform: scale(0.92);
}