@layer base {
  .flash {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius-md);
  }

  .flash-notice {
    background-color: #dcfce7;
    border: 1px solid #86efac;
    color: #166534;
  }

  .flash-alert {
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
  }

  .free-plan-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    background: white;
    border: 1px solid;
    border-radius: var(--radius-md);
  }

  .free-plan-banner p {
    margin: 0;
  }

  .clipboard-feedback {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    z-index: 1000;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--color-gray-900);
    color: white;
    font-size: 0.875rem;
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, var(--spacing-sm));
    transition: opacity 0.15s ease, transform 0.15s ease;
  }

  .clipboard-feedback-visible {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}