.app-dialog-backdrop {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  z-index: 9999;
  padding: 1.5rem;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  opacity: 1;
  visibility: visible;
}

.app-dialog-backdrop[aria-hidden="true"] {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.app-dialog {
  width: min(480px, 100%);
  background: var(--surface, #111827);
  color: var(--text-primary, #f9fafb);
  border-radius: 0.8rem;
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.45);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.app-dialog[data-variant="warning"] {
  border-color: rgba(250, 204, 21, 0.55);
  box-shadow: 0 24px 48px rgba(180, 83, 9, 0.35);
}

.app-dialog-title {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 600;
}

.app-dialog-message {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-secondary, #cbd5f5);
}

.app-dialog-message p {
  margin: 0 0 0.6rem;
}

.app-dialog-message p:last-child {
  margin-bottom: 0;
}

.app-dialog-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.8rem;
}

.app-dialog-btn {
  min-width: 6rem;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.app-dialog-btn.primary {
  background: linear-gradient(135deg, var(--accent, #38bdf8), var(--accent-strong, #2563eb));
  color: #0b1021;
  box-shadow: 0 10px 24px rgba(56, 189, 248, 0.35);
}

.app-dialog-btn.primary:focus-visible,
.app-dialog-btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.4);
}

.app-dialog-btn.secondary {
  background: rgba(15, 23, 42, 0.65);
  color: var(--text-secondary, #e2e8f0);
  border: 1px solid rgba(148, 163, 184, 0.45);
}

.app-dialog-btn.secondary:focus-visible,
.app-dialog-btn.secondary:hover {
  transform: translateY(-1px);
  background: rgba(30, 41, 59, 0.75);
}

.app-dialog[data-variant="warning"] .app-dialog-title {
  color: #facc15;
}

.app-dialog[data-variant="warning"] .app-dialog-btn.primary {
  background: linear-gradient(135deg, #facc15, #f97316);
  box-shadow: 0 10px 24px rgba(249, 115, 22, 0.35);
}

.app-dialog[data-variant="warning"] .app-dialog-btn.primary:hover,
.app-dialog[data-variant="warning"] .app-dialog-btn.primary:focus-visible {
  box-shadow: 0 12px 30px rgba(249, 115, 22, 0.45);
}

@media (max-width: 480px) {
  .app-dialog {
    padding: 1.25rem;
    gap: 1rem;
  }

  .app-dialog-title {
    font-size: 1.2rem;
  }

  .app-dialog-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .app-dialog-btn {
    width: 100%;
  }
}