@layer components {
  .calendar {
    display: inline-flex;
    flex-direction: column;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background-color: var(--card);
    user-select: none;
  }

  .calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0.25rem 0.5rem;
  }

  .calendar-heading {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--foreground);
  }

  .calendar-nav {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background-color: transparent;
    color: var(--foreground);
    cursor: pointer;
    transition: background-color 150ms ease;

    &:hover {
      background-color: var(--accent);
    }

    &:focus-visible {
      outline: 2px solid var(--ring);
      outline-offset: 2px;
    }

    & svg {
      width: 0.875rem;
      height: 0.875rem;
    }
  }

  .calendar-grid {
    border-collapse: collapse;
    border-spacing: 0;
  }

  .calendar-day-label {
    width: 2.25rem;
    height: 2.25rem;
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--muted-foreground);
    text-align: center;
    vertical-align: middle;
  }

  .calendar-day {
    width: 2.25rem;
    height: 2.25rem;
    text-align: center;
    vertical-align: middle;
    padding: 0;

    & button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 2rem;
      height: 2rem;
      font-size: 0.8125rem;
      border: none;
      border-radius: var(--radius-md);
      background-color: transparent;
      color: var(--foreground);
      cursor: pointer;
      transition: background-color 150ms ease, color 150ms ease;

      &:hover {
        background-color: var(--accent);
      }

      &:focus-visible {
        outline: 2px solid var(--ring);
        outline-offset: 2px;
      }
    }

    &[data-today] button {
      background-color: var(--accent);
      font-weight: 600;
    }

    &[data-selected] button {
      background-color: var(--primary);
      color: var(--primary-foreground);

      &:hover {
        opacity: 0.9;
      }
    }

    &[data-outside] button {
      color: var(--muted-foreground);
      opacity: 0.5;
    }

    &[data-disabled] button {
      color: var(--muted-foreground);
      opacity: 0.35;
      cursor: not-allowed;
    }
  }
}

/* Accessibility: suppress motion for users who request it (REQUIRED for all
   components — AGENTS.md "Accessibility CSS"). Near-zero duration instead of
   `none` keeps transitionend/animationend (and discrete display flips)
   firing so JS state machines that await them keep working. */
@media (prefers-reduced-motion: reduce) {
  @layer components {
    .calendar,
    .calendar *,
    .calendar::before,
    .calendar::after,
    .calendar *::before,
    .calendar *::after,
    .calendar::backdrop,
    .calendar-header,
    .calendar-header *,
    .calendar-header::before,
    .calendar-header::after,
    .calendar-header *::before,
    .calendar-header *::after,
    .calendar-header::backdrop,
    .calendar-heading,
    .calendar-heading *,
    .calendar-heading::before,
    .calendar-heading::after,
    .calendar-heading *::before,
    .calendar-heading *::after,
    .calendar-heading::backdrop,
    .calendar-nav,
    .calendar-nav *,
    .calendar-nav::before,
    .calendar-nav::after,
    .calendar-nav *::before,
    .calendar-nav *::after,
    .calendar-nav::backdrop,
    .calendar-grid,
    .calendar-grid *,
    .calendar-grid::before,
    .calendar-grid::after,
    .calendar-grid *::before,
    .calendar-grid *::after,
    .calendar-grid::backdrop,
    .calendar-day-label,
    .calendar-day-label *,
    .calendar-day-label::before,
    .calendar-day-label::after,
    .calendar-day-label *::before,
    .calendar-day-label *::after,
    .calendar-day-label::backdrop,
    .calendar-day,
    .calendar-day *,
    .calendar-day::before,
    .calendar-day::after,
    .calendar-day *::before,
    .calendar-day *::after,
    .calendar-day::backdrop {
      transition-duration: 0.01ms !important;
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
    }
  }
}