/* ========================================
   SLIDE-OUT PANEL
   Slides from sidebar's right edge
   ======================================== */

/* Backdrop for click-outside-to-close */
.slideout-backdrop {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: var(--z-slideout);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

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

.slideout-backdrop.hidden {
  display: none;
}

/* ========================================
   SLIDEOUT PANEL
   ======================================== */

.slideout {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  width: var(--slideout-width);
  height: 100vh;
  background: var(--panel-bg-solid);
  border-right: var(--border-width) solid var(--color-border);
  box-shadow: var(--shadow-lg);
  z-index: calc(var(--z-slideout) + 1);
  transform: translateX(-100%);
  transition: transform var(--transition-slide);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.slideout.visible {
  transform: translateX(0);
}

.slideout.hidden {
  display: none;
}

/* ========================================
   SLIDEOUT HEADER
   ======================================== */

.slideout-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: var(--border-width) solid var(--color-border);
  background: var(--color-bg-dark);
}

.slideout-title {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 400;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin: 0;
}

.slideout-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: calc(var(--vw) * 1.5);
  height: calc(var(--vw) * 1.5);
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.slideout-close:hover {
  background: var(--panel-bg-hover);
}

/* X icon using CSS */
.slideout-close-icon {
  position: relative;
  width: calc(var(--vw) * 0.8);
  height: calc(var(--vw) * 0.8);
}

.slideout-close-icon::before,
.slideout-close-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: calc(var(--vw) * 0.08);
  background: var(--color-text-secondary);
  transition: background var(--transition-fast);
}

.slideout-close-icon::before {
  transform: translateY(-50%) rotate(45deg);
}

.slideout-close-icon::after {
  transform: translateY(-50%) rotate(-45deg);
}

.slideout-close:hover .slideout-close-icon::before,
.slideout-close:hover .slideout-close-icon::after {
  background: var(--color-text-primary);
}

/* ========================================
   SLIDEOUT BODY
   ======================================== */

.slideout-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.slideout-body::-webkit-scrollbar {
  display: none;
}

/* ========================================
   SLIDEOUT FOOTER (optional)
   ======================================== */

.slideout-footer {
  flex-shrink: 0;
  padding: var(--space-md) var(--space-lg);
  border-top: var(--border-width) solid var(--color-border);
  background: var(--color-bg-dark);
}

/* ========================================
   SLIDEOUT LIST ITEMS
   Common pattern for selectable lists
   ======================================== */

.slideout-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.slideout-list-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  cursor: pointer;
  border-bottom: var(--border-width) solid var(--color-border);
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.slideout-list-item:last-child {
  border-bottom: none;
}

.slideout-list-item:hover {
  background: var(--panel-bg-hover);
  color: var(--color-text-primary);
}

.slideout-list-item.selected {
  color: var(--color-accent-gold);
  background: rgba(64, 200, 200, 0.15);
}

.slideout-list-item.disabled {
  color: var(--color-text-disabled);
  cursor: not-allowed;
}

.slideout-list-item.disabled:hover {
  background: transparent;
  color: var(--color-text-disabled);
}