/* ==========================================================================
   AIRH Sliding Panel — Futuristic Neumorphism
   ========================================================================== */

/* ---------------------------------------------------------------------------
   Overlay
   --------------------------------------------------------------------------- */
.panel-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--color-backdrop);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: var(--z-panel);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-panel),
    visibility var(--transition-panel);
}

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

/* ---------------------------------------------------------------------------
   Panel Container — Raised neumorphic
   --------------------------------------------------------------------------- */
.sliding-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 50vw;
  max-width: 50vw;
  background: var(--color-bg-primary);
  z-index: calc(var(--z-panel) + 1);
  box-shadow: var(--neu-raised-lg);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-panel);
  will-change: transform;
}

.sliding-panel.is-open {
  transform: translateX(0);
}

.sliding-panel--sm { max-width: 420px; width: 90%; }
.sliding-panel--lg { max-width: 900px; width: 85%; }

/* ---------------------------------------------------------------------------
   Panel Header — Neumorphic
   --------------------------------------------------------------------------- */
.sliding-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: none;
  flex-shrink: 0;
  gap: var(--space-4);
  position: relative;
}

.sliding-panel__header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-6);
  right: var(--space-6);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border-light), transparent);
}

.sliding-panel__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sliding-panel__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

.sliding-panel__header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.sliding-panel__close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  background: var(--color-bg-primary);
  border: none;
  cursor: pointer;
  box-shadow: var(--neu-flat);
  transition: all 0.2s ease;
}

.sliding-panel__close:hover {
  box-shadow: var(--neu-inset-sm);
  color: var(--color-text-primary);
}

/* ---------------------------------------------------------------------------
   Panel Content
   --------------------------------------------------------------------------- */
.sliding-panel__content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-6);
  -webkit-overflow-scrolling: touch;
}

.sliding-panel__content--flush { padding: 0; }

.sliding-panel__section { margin-bottom: var(--space-8); }
.sliding-panel__section:last-child { margin-bottom: 0; }

.sliding-panel__section-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-4);
}

/* ---------------------------------------------------------------------------
   Panel Footer — Neumorphic
   --------------------------------------------------------------------------- */
.sliding-panel__footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: none;
  flex-shrink: 0;
  position: relative;
}

.sliding-panel__footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: var(--space-6);
  right: var(--space-6);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border-light), transparent);
}

.sliding-panel__footer--between { justify-content: space-between; }

/* ---------------------------------------------------------------------------
   Mobile
   --------------------------------------------------------------------------- */
@media (max-width: 639px) {
  .sliding-panel {
    width: 100%;
    max-width: 100%;
  }

  .sliding-panel__header { padding: var(--space-4); }
  .sliding-panel__content { padding: var(--space-4); }

  .sliding-panel__footer {
    padding: var(--space-4);
    padding-bottom: calc(var(--space-4) + env(safe-area-inset-bottom, 0));
  }
}