@layer components {
  /* ── Debug baseline grid ─────────────────────────────────────────── */

  body.grid::after {
    --opacity: 10%;

    content: "";
    display: block;
    position: absolute;
    inset: var(--baseline-offset);
    pointer-events: none;
    z-index: 200;
    background-image:
      linear-gradient(
        to top,
        color-mix(in srgb, var(--baseline-color) var(--opacity), transparent) 0,
        color-mix(in srgb, var(--baseline-color) var(--opacity), transparent) 1px,
        transparent 1px,
        transparent
      ),
      linear-gradient(
        to right,
        color-mix(in srgb, var(--baseline-color) var(--opacity), transparent) 0,
        color-mix(in srgb, var(--baseline-color) var(--opacity), transparent) 1px,
        transparent 1px,
        transparent
      );
    background-size:
      100% var(--baseline),
      var(--baseline) 100%;
  }

  /* ── Top account nav ─────────────────────────────────────────────── */

  body > nav {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: start;
    margin-block-end: var(--spacing-md);

    & > .home-link {
      grid-column: 1;
      justify-self: start;
      padding-inline: var(--spacing-sm);
      min-height: calc(var(--baseline) * 4);

      &::before {
        inset-inline: 0;
      }
    }

    & > search {
      grid-column: 2;
      justify-self: center;
    }

    & > div {
      grid-column: 3;
      display: flex;
      flex-direction: column;
      align-items: end;

      & > :only-child {
        & a,
        .link {
          line-height: calc(var(--baseline) * 4);
        }
      }
    }
  }

  /* ── Page shell: left rail | center paper | right rail ────────────── */

  .page-shell {
    --sidebar-width: calc(var(--baseline) * 28);
    --sidebar-min-width: calc(var(--baseline) * 22);
    --shell-gap: var(--spacing-lg);

    display: grid;
    grid-template-columns:
      minmax(var(--sidebar-min-width), 1fr)
      minmax(0, calc(var(--baseline) * var(--container-multiplier)))
      minmax(var(--sidebar-min-width), 1fr);
    gap: var(--shell-gap);
    align-items: start;
    width: 100%;
    max-width: calc(
      var(--baseline) * var(--container-multiplier) + var(--sidebar-width) * 2 + var(--shell-gap) *
        2
    );
    margin-inline: auto;
    margin-block-start: calc(var(--baseline) * 8);

    /* Wide center column (invoices). Set via content_for :shell_class. */
    &.wide {
      --container-multiplier: 128;
      --content-padding: var(--spacing-2xl);
    }

    & > aside {
      min-width: 0;
      width: min(100%, var(--sidebar-width));
      position: sticky;
      top: var(--spacing-md);

      &:first-of-type {
        justify-self: end;
      }

      &:last-of-type {
        justify-self: start;
      }

      /* Side rails accept a bare <nav> of actions/links. */
      & > nav {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
        margin: 0;
        margin-block-start: var(--spacing-lg);

        a:not(.button),
        .link {
          display: block;
        }

        /* Visuals come from the shared .button styles; place it here. */
        & .button {
          align-self: flex-end;
          white-space: nowrap;
        }
      }
    }

    & > main {
      width: 100%;
      min-width: 0;
      max-width: none;
      margin-inline: 0;
    }

    @media (max-width: 64rem) {
      display: flex;
      flex-direction: column;
      max-width: calc(var(--baseline) * var(--container-multiplier));

      & > aside {
        position: static;
        width: 100%;
        justify-self: stretch;

        &:first-of-type {
          order: 1;
        }

        &:last-of-type {
          order: 3;
        }

        & > nav .button {
          align-self: flex-start;
        }
      }

      & > main {
        order: 2;
      }
    }
  }

  /* ── Center column surfaces (see layouts/{_tinted,_sheet,_panel}) ── */

  .sheet,
  .tinted,
  .panel {
    position: relative;
  }

  .sheet,
  .panel {
    border-radius: var(--radius-default);
  }

  .sheet {
    background: var(--surface-color);
    box-shadow: var(--border-shadow);

    & > .content {
      padding: var(--content-padding);
    }
  }

  .tinted {
    background: var(--background-tint-0);
    display: flow-root; /* contain child margins inside the tint */
    /* Concentric with an inset panel: outer radius = panel radius + inset. */
    border-radius: calc(var(--radius-default) + var(--tint-inset));

    /* Opt-in inset — pages wrap body in .content when they want it. */
    & > .content {
      margin: var(--spacing-xl);

      & > h1:only-child {
        margin-block-end: 0;
      }
    }
  }

  .panel {
    background: var(--surface-color);
    box-shadow: 0 0 0 1px var(--border-tint-1);
    margin: var(--tint-inset);
    padding: var(--content-padding);
  }

  /* ── Modal dialog shell ──────────────────────────────────────────── */

  el-dialog > dialog {
    width: 100%;
    height: 100%;
    max-width: none;
    max-height: none;
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    color: inherit;

    &::backdrop {
      background: transparent;
    }
  }

  el-dialog-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: color-mix(in oklch, black 25%, transparent);
    transition-property: opacity, display, overlay;
    transition-duration: var(--dialog-transition-duration);
    transition-behavior: allow-discrete;

    &[data-closed] {
      opacity: 0;
    }
  }

  el-dialog-scroll {
    display: block;
    position: fixed;
    inset: 0;
    overflow-y: auto;
    padding: var(--spacing-xl);
    padding-block-start: 15vh;

    @media (max-width: 64rem) {
      padding-inline: var(--spacing-sm);
    }
  }

  el-dialog-panel {
    display: block;
    margin-inline: auto;
    border-radius: var(--radius-default);
    background: var(--surface-color);
    box-shadow:
      0 0 0 1px var(--border-color),
      0 4px 16px color-mix(in oklch, black 10%, transparent);
    transform-origin: top center;
    transition-property: opacity, scale, transform, display, overlay;
    transition-duration: var(--dialog-transition-duration);
    transition-behavior: allow-discrete;

    &[data-closed] {
      opacity: 0;
      scale: 0.95;
    }
  }

  el-dialog-backdrop,
  el-dialog-panel {
    &[data-enter] {
      transition-duration: var(--dialog-enter-duration);
      transition-timing-function: var(--ease-out);
    }

    &[data-leave] {
      transition-duration: var(--dialog-leave-duration);
      transition-timing-function: var(--ease-in);
    }
  }

  /* ── In-sheet toolbar ────────────────────────────────────────────── */

  .toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: var(--spacing-sm);
    padding-inline: var(--spacing-md);
    box-shadow: 0 1px 0 var(--border-color);

    & > .toolbar-context,
    & > .actions {
      display: flex;
      align-items: center;
      gap: var(--spacing-sm);
    }

    /* Primary action (e.g. Done): bright, borderless, one baseline shorter. */
    & > .actions > button:not(.link) {
      --background-color: var(--accent-color);

      height: calc(var(--font-size) + var(--baseline));
      box-shadow: none;
      color: var(--text-on-emphasis-color);
      /* Stacks with the flex gap to double the space before the dropdown. */
      margin-inline-end: var(--spacing-sm);

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

  /* ── Shared form error banner ────────────────────────────────────── */

  .form-errors {
    margin-block-end: var(--spacing-xl);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--error-background);
    box-shadow: 0 0 0 1px var(--error-border-color);
    border-radius: var(--radius-default);
    color: var(--error-color);

    & > p {
      color: var(--error-color);
      font-weight: 600;
      margin-block-end: var(--spacing-sm);
    }

    & > ul {
      margin: 0;
      padding-inline-start: var(--spacing-lg);
    }
  }

  /* ── Page-level status messages ──────────────────────────────────── */

  .flashes {
    position: fixed;
    inset-block-start: var(--spacing-md);
    inset-inline-end: var(--spacing-md);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    width: min(calc(var(--baseline) * 48), calc(100% - var(--spacing-md) * 2));
    pointer-events: none;
  }

  .flash {
    --color: var(--notice-color);
    --background-color: var(--notice-background);
    --border-color: var(--notice-border-color);

    display: flex;
    align-items: start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-default);
    color: var(--color);
    background: var(--background-color);
    box-shadow: 0 0 0 1px var(--border-color);
    pointer-events: auto;

    & > span {
      flex: 1;
      min-width: 0;
      overflow-wrap: anywhere;
    }

    & > .flash-close {
      flex: none;
      justify-content: center;
      width: var(--line-height);
      height: var(--line-height);
      color: inherit;

      &::before {
        inset-inline: 0;
      }
    }

    &.flash--error {
      --color: var(--error-color);
      --background-color: var(--error-background);
      --border-color: var(--error-border-color);
    }
  }

  /* ── Horizontal action rows (address edit/cancel, invoice back, …) ─ */

  .actions-row {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;

    form + &,
    :not(.actions-row) + & {
      margin-block-start: var(--spacing-md);
    }
  }

  /* ── Debug toolbar ───────────────────────────────────────────────── */

  .debug-toolbar {
    position: fixed;
    inset-inline: 0;
    bottom: 0;
    padding: var(--baseline);
    display: flex;
    gap: var(--baseline);

    & button.active {
      color: var(--gray-950);
      --border-color: var(--gray-700);
      --background-color: var(--gray-200);

      &:hover {
        --background-color: var(--gray-300);
      }
    }
  }

  /* ── Shift-held keyboard shortcut hints ──────────────────────────── */

  .keyboard-shortcut-hint {
    --color: var(--theme-900);
    display: none;
    flex: none;
    align-items: center;
    justify-content: center;
    padding-inline: var(--spacing-xs);
    padding-block-end: 1px;
    aspect-ratio: 1;
    border: 0;
    border-radius: var(--radius-default);
    box-shadow:
      0 0 0 1px var(--color),
      inset 0 -1px 0 var(--color);
    background: var(--surface-color);
    color: var(--color);
    font-family: inherit;
    font-size: 12px;
    font-weight: 500;
    line-height: 1;
  }

  .show-keyboard-shortcuts .keyboard-shortcut-hint {
    display: inline-flex;
  }

  el-menu > :is(a, button) .keyboard-shortcut-hint,
  el-menu > form > :is(button, input[type="submit"]) .keyboard-shortcut-hint {
    margin-inline-start: auto;
  }
}