/* Fixed navigation bar at bottom */
.nav {
  position: fixed;
  left: 50%;
  bottom: max(var(--spacing-xl), calc(env(safe-area-inset-bottom, 0px) + 12px));
  transform: translateX(-50%);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px 16px;
  display: flex;
  gap: 12px;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* Navigation button */
.nav-button {
  background: transparent;
  border: none;
  padding: 10px;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.nav-button:hover {
  background: rgba(0, 0, 0, 0.03);
  transform: translateY(-4px);
}

.nav-button:active {
  transform: scale(0.95);
}

/* Navigation icon size */
.nav-button img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
}

/* Active navigation state - minimal dot below icon */
.nav-button.active {
  opacity: 1;
}

.nav-button.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 50%;
}

.nav-button {
  opacity: 0.5;
}

.nav-button:hover,
.nav-button.active {
  opacity: 1;
}

/* Archive / short nav: shrink bar to content, avoid oversized pill on mobile */
.nav--compact {
  width: auto;
  max-width: calc(100vw - 2 * var(--spacing-md));
  justify-content: center;
}

@media (max-width: 768px) {
  .nav {
    padding: var(--spacing-sm) var(--spacing-sm);
    width: 300px;
    gap: var(--spacing-sm);
    bottom: max(var(--spacing-md), calc(env(safe-area-inset-bottom, 0px) + 10px));
  }

  .nav--compact {
    width: auto;
    min-width: 0;
    max-width: calc(100vw - 2 * var(--spacing-sm));
    padding-inline: 10px;
    gap: 10px;
  }

  .nav--compact .nav-button {
    padding: 8px 12px;
  }

  .nav-button img {
    width: 28px;
    height: 28px;
  }
}

@media (max-width: 380px) {
  .nav--compact {
    max-width: calc(100vw - 12px);
    padding-inline: 8px;
    gap: 8px;
  }

  .nav--compact .nav-button {
    padding: 6px 10px;
  }

  .nav--compact .nav-button img {
    width: 26px;
    height: 26px;
  }
}