/* --------------------------------------------------------------------------
   13. TOAST NOTIFICATIONS SYSTEM
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  background: var(--panel-strong);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.85rem 1.25rem;
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: var(--shadow);
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  animation: toastIn 260ms var(--ease-smooth);
  transition: all 240ms ease;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.toast.toast-fade-out {
  opacity: 0;
  transform: translateY(8px) scale(0.96);
}

/* --------------------------------------------------------------------------
   14. MOBILE BOTTOM SHEET & MOBILE TOP BAR
   -------------------------------------------------------------------------- */
.mobile-only {
  display: none;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 90;
  opacity: 0;
  transition: opacity 240ms ease;
  pointer-events: none;
}

.sidebar-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* Bottom Sheet Modal */
.bottom-sheet {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  pointer-events: none;
  opacity: 0;
  transition: opacity 250ms ease;
}

.bottom-sheet.open {
  pointer-events: auto;
  opacity: 1;
}

.bottom-sheet-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.bottom-sheet-surface {
  position: relative;
  background: var(--panel-strong);
  border-top: 1px solid var(--border);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  padding: 1.2rem 1.4rem calc(1.5rem + env(safe-area-inset-bottom, 0px));
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.4);
  transform: translateY(100%);
  transition: transform 300ms var(--ease-smooth);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 90vh;
  overflow-y: auto;
}

.bottom-sheet.open .bottom-sheet-surface {
  transform: translateY(0);
}

.bottom-sheet-handle {
  width: 40px;
  height: 4px;
  border-radius: 999px;
  background: var(--muted);
  align-self: center;
  margin-bottom: 0.2rem;
}

.bottom-sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.bottom-sheet-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--text);
}

.mobile-options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 0.85rem 0;
}

.full-span {
  grid-column: span 2;
}

.full-width {
  width: 100%;
}

.mobile-submit-btn {
  padding: 0.95rem;
  font-size: 1rem;
}