/* ================================================
   NAVIGATION
   ================================================ */

/* Navigation Menu */
.nav-menu {
  position: fixed;
  top: 0;
  right: -18.75rem;
  width: 18.75rem;
  height: 100vh;
  background: var(--color-surface);
  box-shadow: -0.125rem 0 var(--spacing-md) rgba(0, 0, 0, 0.1);
  transition: right var(--transition-slow) ease;
  padding: 3.75rem var(--spacing-2xl) var(--spacing-2xl);
  overflow-y: auto;
}

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

.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-slow) ease;
}

.nav-overlay.open {
  opacity: 1;
  visibility: visible;
}

.nav-close {
  position: absolute;
  top: var(--spacing-2xl);
  right: var(--spacing-2xl);
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  cursor: pointer;
  padding: var(--spacing-md);
  color: var(--color-text);
}

.nav-item {
  display: block;
  width: 100%;
  padding: var(--spacing-input);
  margin-bottom: var(--spacing-md);
  background: var(--color-surface-hover);
  border: none;
  border-radius: var(--radius-lg);
  text-align: left;
  cursor: pointer;
  font-size: var(--font-size-base);
  color: var(--color-text);
  transition: background var(--transition-normal);
}

.nav-item:hover {
  background: var(--color-nav-hover);
}

.nav-setting {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl);
  background: var(--color-surface-secondary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-xl);
}

.nav-setting-label {
  display: flex;
  align-items: center;
  cursor: pointer;
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  user-select: none;
  transition: color 0.2s ease;
}

.nav-setting-label:hover {
  color: var(--color-primary);
}

.nav-setting-label input[type="checkbox"] {
  margin-right: var(--spacing-lg);
  width: 1.25rem;
  height: 1.25rem;
  accent-color: var(--color-primary);
  cursor: pointer;
  border-radius: 0.25rem;
  transition: all 0.2s ease;
}

.nav-setting-label input[type="checkbox"]:checked {
  transform: scale(1.1);
}

.nav-setting-label span {
  position: relative;
  transition: all 0.2s ease;
}

.nav-setting-label span::after {
  content: "📳";
  margin-left: var(--spacing-sm);
  font-size: var(--font-size-lg);
  opacity: 0.7;
  transition: all 0.2s ease;
}

.nav-setting-label:hover span::after {
  opacity: 1;
  transform: scale(1.1);
}

.nav-setting-label input[type="checkbox"]:checked + span::after {
  animation: vibrate-icon 0.5s ease-in-out;
}

.nav-version {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl);
  background: var(--color-surface-secondary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-lighter);
  box-shadow: var(--shadow-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.version-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}

#version-display {
  font-size: 0.75rem;
  font-family: monospace;
  /* TODO: Accessibility: Ensure contrast is sufficient
  color: var(--color-text-light);
  background: var(--color-surface-tertiary); */
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
}