/* Flash messages */
.flash-container {
  position: fixed;
  top: var(--block-space-half);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--block-space-half);
  max-width: 40ch;
  width: 100%;
  pointer-events: none;
  view-transition-name: flash-container;
}

.flash {
  background-color: var(--color-bg);
  border: 1px solid var(--color-subtle);
  border-radius: 9999px;
  color: var(--color-ink);
  padding: var(--block-space) var(--inline-space-double);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  pointer-events: auto;
  animation: flash-slide-in 0.3s ease-out;
  font-size: 0.9rem;
  line-height: 1.3;
  display: flex;
  align-items: center;
  gap: var(--inline-space);
}

.flash--notice {
  border-color: var(--color-positive);
  background-color: var(--color-positive-light);
}

.flash--alert {
  border-color: var(--color-negative);
  background-color: oklch(from var(--color-negative) 95% 0.03 h);
}

.flash__close {
  background: none;
  border: none;
  color: var(--color-ink);
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
  margin-left: auto;
  margin-top: -0.2rem;
  opacity: 0.6;
  padding: 0;
  transition: opacity 150ms ease;
}

.flash__close:hover {
  opacity: 1;
}

@keyframes flash-slide-in {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes flash-slide-out {
  from {
    transform: translateY(0);
    opacity: 1;
  }
  to {
    transform: translateY(-100%);
    opacity: 0;
  }
}

@media (prefers-color-scheme: dark) {
  .flash {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  }
  
  .flash--notice {
    background-color: oklch(from var(--color-positive) 20% 0.05 h);
  }
  
  .flash--alert {
    background-color: oklch(from var(--color-negative) 20% 0.05 h);
  }
}

@media (max-width: 768px) {
  .flash-container {
    left: var(--inline-space-double);
    right: var(--inline-space-double);
    transform: none;
    max-width: none;
  }
}

/* Ensure flash container appears above header during view transitions */
::view-transition-group(flash-container) {
  z-index: 10000;
}