/* ─── Side Menu ─────────────────────────────────────────────── */
.menu-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: var(--z-above);
}

.hamburger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  background: var(--color-background, #fff);
  color: var(--color-text, #111);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.hamburger:hover {
  transform: scale(1.07);
  box-shadow: var(--shadow-lg);
}

.hamburger:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Hamburger → X animation */
.hamburger-icon .bar {
  transform-origin: center;
  transition:
    transform 0.25s ease,
    opacity 0.2s ease;
}

.hamburger[aria-expanded="true"] .bar-top {
  transform: translateY(4.5px) rotate(45deg);
}
.hamburger[aria-expanded="true"] .bar-mid {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger[aria-expanded="true"] .bar-bottom {
  transform: translateY(-4.5px) rotate(-45deg);
}

/* Backdrop */
.side-menu-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(2px);
  z-index: calc(var(--z-overlay) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.side-menu-backdrop.visible {
  opacity: 1;
  pointer-events: auto;
}

/* Side menu panel */
.side-menu {
  position: fixed;
  top: 0;
  right: -360px;
  width: 340px;
  height: 100%;
  background: var(--color-background, #fff);
  box-shadow: var(--shadow-lg);
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: var(--z-overlay);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

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

/* Menu header */
.menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 20px 12px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.menu-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.close-menu {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 1px solid var(--color-border);
  background: var(--color-background-secondary, #f5f5f5);
  color: var(--color-text);
  transition:
    transform 0.25s ease,
    background-color 0.2s ease;
}

.close-menu:hover {
  transform: rotate(90deg);
  background: var(--color-primary-light, #e8f0fe);
}

.close-menu:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Scrollable nav */
nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 16px 16px 20px;
  display: flex;
  flex-direction: column;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

nav::-webkit-scrollbar {
  width: 5px;
}
nav::-webkit-scrollbar-track {
  background: transparent;
}
nav::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}
nav::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}

/* Menu items */
.menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 11px 14px;
  text-decoration: none;
  border-radius: 10px;
  margin-bottom: 3px;
  background: none;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  text-align: right;
  direction: inherit;
  transition:
    background-color 0.18s ease,
    transform 0.18s ease,
    color 0.18s ease;
}

.menu-item:hover {
  background: var(--color-background-secondary, #f5f5f5);
  transform: translateX(-3px); /* RTL: slide left toward content */
}

.menu-item:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
  border-radius: 10px;
}

.menu-item.active {
  background: var(--color-primary-light, #e8f0fe);
  color: var(--color-primary);
  font-weight: 700;
}

/* Divider */
.menu-divider {
  height: 1px;
  background: var(--color-border);
  margin: 10px 0;
  flex-shrink: 0;
}

/* Theme section */
.theme-controls-section {
  margin-top: 4px;
}

.theme-section-header,
.animation-section-header {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--color-text-tertiary, #888);
  margin-bottom: 10px;
}

.animation-section-header {
  margin-top: 18px;
}

.theme-selector-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 4px;
}

.theme-selector-btn {
  border: 2px solid var(--color-border);
  border-radius: 12px;
  padding: 13px 8px;
  cursor: pointer;
  background: none;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.theme-selector-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.theme-selector-btn[aria-pressed="true"] {
  border-color: var(--color-primary);
  border-width: 2.5px;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.theme-btn-icon {
  font-size: 1.4rem;
  transition: transform 0.2s ease;
}

.theme-selector-btn[aria-pressed="true"] .theme-btn-icon {
  transform: scale(1.15);
}

.theme-btn-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text);
}

.theme-selector-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Animation toggle — native checkbox styled as switch */
.animation-toggle-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1.5px solid var(--color-border);
  border-radius: 12px;
  padding: 11px 14px;
  cursor: pointer;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
  user-select: none;
}

.animation-toggle-container:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-primary);
}

.animation-toggle-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}

.toggle-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.toggle-switch {
  position: relative;
  width: 48px;
  height: 26px;
  border-radius: 100px;
  background: var(--color-border, #ccc);
  transition: background 0.3s ease;
  flex-shrink: 0;
}

.toggle-switch::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
}

.toggle-input:checked ~ .toggle-switch {
  background: var(--color-primary, #4f6ef7);
}

.toggle-input:checked ~ .toggle-switch::after {
  left: 25px;
}

.toggle-input:focus-visible ~ .toggle-switch {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.theme-info-text {
  font-size: 0.78rem;
  margin-top: 10px;
  line-height: 1.5;
  font-style: italic;
  opacity: 0.65;
  color: var(--color-text);
}

/* ─── Responsive ──────────────────────────────────────────── */

@media (max-width: 768px) {
  .menu-container {
    top: 10px;
    right: 10px;
  }

  .hamburger {
    width: 40px;
    height: 40px;
    border-radius: 8px;
  }

  .side-menu {
    width: 300px;
    right: -300px;
  }
}

@media (max-width: 600px) {
  .side-menu {
    top: auto;
    bottom: -100%;
    right: 0;
    left: 0;
    width: 100%;
    height: 72vh;
    border-radius: 20px 20px 0 0;
    transition: bottom 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .side-menu.open {
    bottom: 0;
    right: 0;
  }

  /* Drag handle hint */
  .side-menu::before {
    content: "";
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 4px;
    background: var(--color-border);
    border-radius: 2px;
  }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .side-menu,
  .hamburger-icon .bar,
  .toggle-switch,
  .toggle-switch::after,
  .side-menu-backdrop,
  .close-menu,
  .menu-item,
  .theme-selector-btn {
    transition: none;
  }
}