@layer components {
  /*
   * Two tiles to choose between sharing photos and writing a message.
   * Plain radio buttons; :has() shows the matching panel, no JavaScript needed.
   */
  .mode-switch {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xs);
    margin: 0;
    padding: 0;
    border: none;

    & input {
      position: absolute;
      opacity: 0;
      pointer-events: none;
    }
  }

  .mode-switch__option {
    display: grid;
    justify-items: center;
    gap: var(--space-3xs);
    padding: var(--space-s) var(--space-2xs);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-l);
    background-color: var(--color-surface);
    color: var(--color-text-muted);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition:
      border-color var(--duration-fast) var(--ease-out),
      background-color var(--duration-fast) var(--ease-out),
      color var(--duration-fast) var(--ease-out);

    & svg {
      inline-size: 1.6rem;
      block-size: 1.6rem;
    }

    input:checked + & {
      border-color: var(--color-accent);
      background-color: var(--color-accent-subtle);
      color: var(--color-accent);
    }

    input:focus-visible + & {
      box-shadow: var(--focus-ring);
    }
  }

  .guest-event:has(#mode-photos:checked) .guest-panel--message,
  .guest-event:has(#mode-message:checked) .guest-panel--photos {
    display: none;
  }

  /* Big tap target to pick photos; also accepts drag and drop on desktop. */
  .dropzone {
    display: grid;
    justify-items: center;
    gap: var(--space-3xs);
    padding: var(--space-l) var(--space-s);
    border: 2px dashed var(--color-border-strong);
    border-radius: var(--radius-l);
    background-color: var(--color-surface-sunken);
    text-align: center;
    cursor: pointer;
    transition: border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);

    &:hover, &.is-dragging {
      border-color: var(--color-accent);
      background-color: var(--color-accent-subtle);
    }

    &:has(input:focus-visible) {
      box-shadow: var(--focus-ring);
    }
  }

  .dropzone--compact {
    grid-template-columns: auto 1fr;
    justify-items: start;
    column-gap: var(--space-xs);
    padding: var(--space-xs) var(--space-s);
    text-align: start;

    & .dropzone__icon {
      grid-row: span 2;
      inline-size: 2.5rem;
      block-size: 2.5rem;

      & svg { inline-size: 1.2rem; block-size: 1.2rem; }
    }

    & .dropzone__label { font-size: var(--step-0); }
  }

  .dropzone__icon {
    display: grid;
    place-items: center;
    inline-size: 3.5rem;
    block-size: 3.5rem;
    border-radius: var(--radius-full);
    background-color: var(--color-accent);
    color: var(--color-on-accent);

    & svg { inline-size: 1.6rem; block-size: 1.6rem; }
  }

  .dropzone__label {
    font-size: var(--step-1);
    font-weight: 600;
  }

  .dropzone__hint {
    color: var(--color-text-muted);
    font-size: var(--step--1);
  }

  /* Selected photos with upload progress */
  .upload-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(5.5rem, 1fr));
    gap: var(--space-2xs);
    margin-block-start: var(--space-xs);
    padding: 0;
  }

  .upload-item {
    --progress: 0;

    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: var(--radius-m);
    background-color: var(--color-surface-sunken);
    list-style: none;

    &::after {
      content: "";
      position: absolute;
      inset: 0;
      background-color: oklch(0% 0 0 / 0.35);
      transition: opacity var(--duration-base) var(--ease-out);
    }

    &[data-state="done"]::after { opacity: 0; }
    &[data-state="failed"]::after { background-color: color-mix(in oklab, var(--color-danger) 55%, transparent); }
  }

  .upload-item__preview {
    inline-size: 100%;
    block-size: 100%;
    object-fit: cover;

    .is-unpreviewable & { display: none; }
  }

  /* Shown when the browser can't render the file (e.g. HEIC outside Safari) */
  .upload-item__name {
    display: none;
    position: absolute;
    inset: 0;
    padding: var(--space-2xs);
    color: var(--color-text-muted);
    font-size: 0.7rem;
    overflow-wrap: anywhere;
    place-content: center;
    text-align: center;

    .is-unpreviewable & { display: grid; }
  }

  .upload-item__bar {
    position: absolute;
    inset: auto var(--space-2xs) var(--space-2xs);
    z-index: 1;
    block-size: 4px;
    border-radius: var(--radius-full);
    background: linear-gradient(to right, oklch(100% 0 0) calc(var(--progress) * 100%), oklch(100% 0 0 / 0.35) 0);

    [data-state="done"] > &, [data-state="failed"] > & { display: none; }
  }

  .upload-item__done {
    display: none;
    position: absolute;
    inset-block-end: var(--space-3xs);
    inset-inline-start: var(--space-3xs);
    z-index: 1;
    place-items: center;
    inline-size: 1.4rem;
    block-size: 1.4rem;
    border-radius: var(--radius-full);
    background-color: var(--color-success);
    color: oklch(100% 0 0);

    & svg { inline-size: 0.85rem; block-size: 0.85rem; stroke-width: 3; }

    [data-state="done"] > & {
      display: grid;
      animation: pop var(--duration-base) var(--ease-out);
    }
  }

  .upload-item__remove {
    position: absolute;
    inset-block-start: var(--space-3xs);
    inset-inline-end: var(--space-3xs);
    z-index: 1;
    display: grid;
    place-items: center;
    inline-size: 1.75rem;
    block-size: 1.75rem;
    padding: 0;
    border: none;
    border-radius: var(--radius-full);
    background-color: oklch(0% 0 0 / 0.55);
    color: oklch(100% 0 0);
    font-size: 1.1rem;
    line-height: 1;
    cursor: pointer;
  }

  .upload-item__retry {
    display: none;
    position: absolute;
    inset: auto var(--space-3xs) var(--space-3xs);
    z-index: 1;
    padding: 0.2em 0.4em;
    border: none;
    border-radius: var(--radius-s);
    background-color: oklch(100% 0 0);
    color: var(--color-danger);
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;

    [data-state="failed"] > & { display: block; }
  }

  .upload-progress {
    inline-size: 100%;
    block-size: 6px;
    border: none;
    border-radius: var(--radius-full);
    overflow: hidden;
    appearance: none;
    background-color: var(--color-surface-sunken);

    &::-webkit-progress-bar { background-color: var(--color-surface-sunken); }
    &::-webkit-progress-value { background-color: var(--color-accent); transition: inline-size var(--duration-base) var(--ease-out); }
    &::-moz-progress-bar { background-color: var(--color-accent); }
  }

  /* Honeypot field, kept out of sight and out of the accessibility tree */
  .honeypot {
    position: absolute;
    inset-inline-start: -10000px;
    inline-size: 1px;
    block-size: 1px;
    overflow: hidden;
  }

  .guest-thanks {
    padding-block: var(--space-xl);

    & h1 { font-size: var(--step-4); }
  }

  .guest-thanks__icon {
    display: grid;
    place-items: center;
    inline-size: 4rem;
    block-size: 4rem;
    border-radius: var(--radius-full);
    background-color: var(--color-accent);
    color: var(--color-on-accent);
    animation: pop 400ms var(--ease-out);

    & svg { inline-size: 2rem; block-size: 2rem; stroke-width: 2.5; }
  }

  @keyframes pop {
    from { scale: 0.6; opacity: 0; }
  }
}

@layer components {
  /* Once photos are picked, shrink the drop zone so the send button stays in view. */
  .uploader:has(.upload-list:not([hidden])) .dropzone:not(.dropzone--compact) {
    grid-template-columns: auto 1fr;
    justify-items: start;
    column-gap: var(--space-xs);
    padding: var(--space-xs) var(--space-s);
    text-align: start;

    & .dropzone__icon {
      grid-row: span 2;
      inline-size: 2.5rem;
      block-size: 2.5rem;

      & svg { inline-size: 1.2rem; block-size: 1.2rem; }
    }

    & .dropzone__label { font-size: var(--step-0); }
  }
}