/* -- Sheet component ------------------------------------------- */

@layer components {
  /* -- Base -------------------------------------------------- */
  dialog.sheet {
    border: none;
    border-radius: 0;
    background-color: var(--background);
    color: var(--foreground);
    padding: 0;
    margin: 0;
    max-width: none;
    max-height: none;
    opacity: 0;
    transition:
      opacity 300ms ease,
      transform 300ms ease,
      display 300ms allow-discrete;

    &[open] {
      opacity: 1;
    }

    /* -- Side: right (default) --------------------------------- */
    &,
    &[data-side="right"] {
      position: fixed;
      top: 0;
      right: 0;
      bottom: 0;
      left: auto;
      width: 24rem;
      max-width: 100vw;
      max-height: 100vh;
      height: 100%;
      border-left: 1px solid var(--border);
      transform: translateX(100%);
    }

    &[open],
    &[data-side="right"][open] {
      transform: translateX(0);
    }

    /* -- Side: left -------------------------------------------- */
    &[data-side="left"] {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      right: auto;
      width: 24rem;
      max-width: 100vw;
      max-height: 100vh;
      height: 100%;
      border-left: none;
      border-right: 1px solid var(--border);
      transform: translateX(-100%);

      &[open] {
        transform: translateX(0);
      }
    }

    /* -- Side: top --------------------------------------------- */
    &[data-side="top"] {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: auto;
      width: 100%;
      max-width: 100vw;
      /* a sheet, not a page: the backdrop always shows (content scrolls
         inside the modal past this) */
      max-height: 85dvh;
      height: auto;
      border-left: none;
      border-bottom: 1px solid var(--border);
      transform: translateY(-100%);

      &[open] {
        transform: translateY(0);
      }
    }

    /* -- Side: bottom ------------------------------------------ */
    &[data-side="bottom"] {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      top: auto;
      width: 100%;
      max-width: 100vw;
      /* a sheet, not a page: the backdrop always shows (content scrolls
         inside the modal past this) */
      max-height: 85dvh;
      height: auto;
      border-left: none;
      border-top: 1px solid var(--border);
      transform: translateY(100%);

      &[open] {
        transform: translateY(0);
      }
    }

    /* -- Backdrop ---------------------------------------------- */
    &::backdrop {
      background: oklch(0 0 0 / 0);
      backdrop-filter: blur(0px);
      transition:
        all 300ms ease,
        display 300ms allow-discrete;
    }

    &[open]::backdrop {
      background: oklch(0 0 0 / 0.45);
      backdrop-filter: blur(3px);
    }
  }

  @starting-style {
    dialog.sheet[open],
    dialog.sheet[data-side="right"][open] {
      opacity: 0;
      transform: translateX(100%);
    }

    dialog.sheet[data-side="left"][open] {
      opacity: 0;
      transform: translateX(-100%);
    }

    dialog.sheet[data-side="top"][open] {
      opacity: 0;
      transform: translateY(-100%);
    }

    dialog.sheet[data-side="bottom"][open] {
      opacity: 0;
      transform: translateY(100%);
    }

    dialog.sheet[open]::backdrop {
      background: oklch(0 0 0 / 0);
      backdrop-filter: blur(0px);
    }
  }

  /* -- Scroll lock ------------------------------------------- */
  /* Page behind stays put while a sheet is modal (see dialog.css):
     `:modal` + overflow:hidden freezes the viewport at its current offset. */
  html:has(dialog.sheet:modal) {
    overflow: hidden;
    scrollbar-gutter: stable;
  }

  /* -- Content sections -------------------------------------- */
  .sheet-content {
    padding: 1.5rem;
    position: relative;
  }

  /* -- Density ----------------------------------------------------
     data-density on the .sheet root scales the content padding
     (0.75 / 1 / 1.25 of the 1.5rem default); comfortable matches the
     unsized default. The sheet's slide-in width is layout, not whitespace —
     it stays put. */
  .sheet:where([data-density="compact"]) .sheet-content {
    padding: 1rem;
  }
  .sheet:where([data-density="comfortable"]) .sheet-content {
    padding: 1.5rem;
  }
  .sheet:where([data-density="spacious"]) .sheet-content {
    padding: 2rem;
  }

  /* Top/bottom sheets span the full viewport width - on wide screens the
     content would stretch unaligned, so keep a readable, centered column
     (the side sheets are already width-constrained at 24rem). */
  dialog.sheet[data-side="top"] .sheet-content,
  dialog.sheet[data-side="bottom"] .sheet-content {
    max-width: 48rem;
    box-sizing: border-box; /* the 1.5rem padding is part of the 48rem column */
    width: 100%;
    margin-inline: auto;
  }
  .sheet-header {
    margin-bottom: 1rem;
    padding-right: 2rem;
  }
  .sheet-title {
    font-size: 1.0625rem;
    font-weight: 600;
    margin: 0 0 0.375rem;
    letter-spacing: -0.01em;
  }
  .sheet-description {
    font-size: 0.875rem;
    color: var(--muted-foreground);
    margin: 0;
    line-height: 1.6;
  }
  .sheet-body {
    margin-top: 1rem;
  }
  .sheet-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-top: 1.5rem;
  }

  /* -- Close button ------------------------------------------ */
  .sheet-close-x {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--muted-foreground);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition:
      color 150ms,
      background-color 150ms;

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

/* 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 {
    .sheet,
    .sheet *,
    .sheet::before,
    .sheet::after,
    .sheet *::before,
    .sheet *::after,
    .sheet::backdrop,
    .sheet-body,
    .sheet-body *,
    .sheet-body::before,
    .sheet-body::after,
    .sheet-body *::before,
    .sheet-body *::after,
    .sheet-body::backdrop,
    .sheet-close-x,
    .sheet-close-x *,
    .sheet-close-x::before,
    .sheet-close-x::after,
    .sheet-close-x *::before,
    .sheet-close-x *::after,
    .sheet-close-x::backdrop,
    .sheet-content,
    .sheet-content *,
    .sheet-content::before,
    .sheet-content::after,
    .sheet-content *::before,
    .sheet-content *::after,
    .sheet-content::backdrop,
    .sheet-description,
    .sheet-description *,
    .sheet-description::before,
    .sheet-description::after,
    .sheet-description *::before,
    .sheet-description *::after,
    .sheet-description::backdrop,
    .sheet-footer,
    .sheet-footer *,
    .sheet-footer::before,
    .sheet-footer::after,
    .sheet-footer *::before,
    .sheet-footer *::after,
    .sheet-footer::backdrop,
    .sheet-header,
    .sheet-header *,
    .sheet-header::before,
    .sheet-header::after,
    .sheet-header *::before,
    .sheet-header *::after,
    .sheet-header::backdrop,
    .sheet-title,
    .sheet-title *,
    .sheet-title::before,
    .sheet-title::after,
    .sheet-title *::before,
    .sheet-title *::after,
    .sheet-title::backdrop {
      transition-duration: 0.01ms !important;
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
    }
  }
}