@layer components {
  :root[data-theme="theme"] .shell { min-height: 100vh; }

  :root[data-theme="theme"] .site-header {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--space-5);
    width: 100%;
    min-height: 4.5rem;
    padding: 0 max(var(--space-6), calc((100vw - 1180px) / 2));
    background: var(--rail);
    color: var(--rail-text);
  }
  :root[data-theme="theme"] .site-title {
    flex: none;
    padding-block: var(--space-4);
    font-size: var(--fs-lg);
    font-weight: 750;
    text-decoration: none;
  }
  :root[data-theme="theme"] .site-nav {
    display: flex;
    align-self: stretch;
    justify-self: end;
    gap: 0 var(--space-5);
    min-width: 0;
  }
  :root[data-theme="theme"] .site-nav a {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 2.75rem;
    color: var(--rail-text-soft);
    font-size: var(--fs-sm);
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
  }
  :root[data-theme="theme"] .site-nav a:hover,
  :root[data-theme="theme"] .site-nav a[aria-current="page"] { color: var(--rail-text); }
  :root[data-theme="theme"] .site-nav a[aria-current="page"]::after {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 3px;
    background: var(--accent);
    content: "";
  }
  :root[data-theme="theme"] .theme-toggle {
    display: grid;
    width: 2.75rem;
    height: 2.75rem;
    padding: var(--space-3);
    border: 0;
    background: transparent;
    color: var(--rail-text-soft);
    place-items: center;
    cursor: pointer;
  }
  :root[data-theme="theme"] .theme-toggle:hover { color: var(--rail-text); }
  :root[data-theme="theme"] .theme-toggle svg { grid-area: 1 / 1; }
  :root[data-theme="theme"] .theme-toggle__sun { display: none; }
  :root[data-theme="theme"] .theme-toggle[aria-checked="true"] .theme-toggle__sun { display: block; }
  :root[data-theme="theme"] .theme-toggle[aria-checked="true"] .theme-toggle__moon { display: none; }

  :root[data-theme="theme"] .page {
    width: min(1180px, 100%);
    margin: 0 auto;
    padding: var(--space-7) max(var(--space-5), env(safe-area-inset-right)) calc(var(--space-7) + env(safe-area-inset-bottom));
  }
  :root[data-theme="theme"] .page-header {
    display: grid;
    gap: var(--space-3);
    max-width: 760px;
    margin-bottom: var(--space-6);
  }
  :root[data-theme="theme"] .page-header > p { font-size: var(--fs-lg); }
  :root[data-theme="theme"] .back-link {
    display: inline-flex;
    align-items: center;
    min-height: 2.75rem;
    margin-bottom: var(--space-5);
    color: var(--accent-strong);
    font-size: var(--fs-sm);
    font-weight: 700;
    text-decoration: none;
  }
  :root[data-theme="theme"] .back-link:hover { text-decoration: underline; }
  :root[data-theme="theme"] .back-link--button { padding: 0; border: 0; background: transparent; cursor: pointer; }
  :root[data-theme="theme"] .eyebrow,
  :root[data-theme="theme"] .activity-context {
    color: var(--accent-strong);
    font-size: var(--fs-sm);
    font-weight: 750;
    letter-spacing: 0.01em;
  }

  :root[data-theme="theme"] .collection-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }
  :root[data-theme="theme"] .collection-entry {
    display: grid;
    align-content: start;
    gap: var(--space-3);
    min-height: 10rem;
    padding: var(--space-5);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    text-align: left;
    text-decoration: none;
  }
  :root[data-theme="theme"] button.collection-entry { cursor: pointer; }
  :root[data-theme="theme"] .collection-entry:hover { border-color: var(--accent); }
  :root[data-theme="theme"] .collection-entry__title { font-size: var(--fs-lg); line-height: 1.3; }
  :root[data-theme="theme"] .collection-entry__summary { color: var(--text-soft); }
  :root[data-theme="theme"] .collection-entry__status {
    align-self: end;
    margin-top: auto;
    padding-top: var(--space-2);
    color: var(--accent-strong);
    font-size: var(--fs-sm);
    font-weight: 750;
  }
  :root[data-theme="theme"] .collection-entry__status.is-success { color: var(--success); }
  :root[data-theme="theme"] .collection-entry__status.is-danger { color: var(--danger); }

  :root[data-theme="theme"] .btn {
    min-height: 3rem;
    padding: 0.7rem 1.15rem;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-small);
    background: var(--surface);
    color: var(--text);
    font-weight: 750;
    cursor: pointer;
  }
  :root[data-theme="theme"] .btn:hover { border-color: var(--accent); }
  :root[data-theme="theme"] .btn.is-primary { border-color: var(--accent); background: var(--accent); color: #fff; }
  :root[data-theme="theme"] .btn.is-primary:hover { border-color: var(--accent-fill-hover); background: var(--accent-fill-hover); }
  :root[data-theme="theme"] .btn.is-secondary { background: var(--surface); }
  :root[data-theme="theme"] .btn.is-danger { border-color: var(--danger); color: var(--danger); }
  :root[data-theme="theme"] .btn.is-danger:hover { background: var(--danger-soft); }
  :root[data-theme="theme"] .btn.is-warning { border-color: var(--warning); color: var(--warning); }
  :root[data-theme="theme"] .btn.is-warning:hover { background: var(--warning-soft); }
  :root[data-theme="theme"] .btn.is-text {
    min-height: 2.75rem;
    padding: var(--space-2);
    border-color: transparent;
    background: transparent;
    color: var(--accent-strong);
  }
  :root[data-theme="theme"] .btn:disabled { cursor: not-allowed; opacity: var(--disabled-opacity); }

  :root[data-theme="theme"] .activity-shell {
    display: grid;
    grid-template-columns: 20rem minmax(0, 1fr);
    min-height: 100vh;
    background: var(--surface);
  }
  :root[data-theme="theme"] .activity-sidebar {
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    align-self: start;
    height: 100vh;
    padding: var(--space-6);
    overflow: auto;
    background: var(--rail);
    color: var(--rail-text);
  }
  :root[data-theme="theme"] .activity-sidebar h1 {
    color: var(--rail-text);
    font-size: var(--fs-xl);
    overflow-wrap: anywhere;
  }
  :root[data-theme="theme"] .activity-sidebar__identity { display: grid; gap: var(--space-3); }
  :root[data-theme="theme"] .activity-sidebar__label {
    justify-self: start;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-small);
    background: var(--rail-soft);
    color: #60ded8;
    font-size: var(--fs-sm);
    font-weight: 750;
  }
  :root[data-theme="theme"] .activity-sidebar__meta {
    padding-block: var(--space-4);
    border-block: 1px solid var(--rail-line);
    color: var(--rail-text-soft);
    font-size: var(--fs-sm);
    font-weight: 650;
  }
  :root[data-theme="theme"] .activity-sidebar__body {
    display: flex;
    min-height: 0;
    flex: 1;
    flex-direction: column;
  }
  :root[data-theme="theme"] .activity-sidebar__navigation { display: grid; gap: var(--space-4); }
  :root[data-theme="theme"] .activity-sidebar__navigation h2 {
    color: var(--rail-text);
    font-size: var(--fs-md);
  }
  :root[data-theme="theme"] .activity-sidebar__note { color: var(--rail-text-soft); font-size: var(--fs-sm); }
  :root[data-theme="theme"] .activity-sidebar__exit {
    display: flex;
    align-items: center;
    min-height: 3rem;
    margin-top: auto;
    padding: var(--space-2) 0;
    border: 0;
    background: transparent;
    color: var(--rail-text);
    font-weight: 750;
    text-align: left;
    cursor: pointer;
  }
  :root[data-theme="theme"] .activity-sidebar__exit::before {
    margin-right: var(--space-2);
    color: #60ded8;
    content: "←";
  }
  :root[data-theme="theme"] .activity-workspace {
    display: flex;
    min-width: 0;
    min-height: 100vh;
    flex-direction: column;
    background: var(--surface);
  }
  :root[data-theme="theme"] .activity-content {
    display: grid;
    align-content: start;
    gap: var(--space-6);
    width: min(70rem, 100%);
    margin: 0 auto;
    padding: var(--space-7) var(--space-7) var(--space-6);
    flex: 1;
  }
  :root[data-theme="theme"] .activity-context { min-height: 1.5rem; }
  :root[data-theme="theme"] .activity-footer {
    position: sticky;
    z-index: 5;
    bottom: 0;
    margin-top: auto;
    padding: var(--space-4) var(--space-7) calc(var(--space-4) + env(safe-area-inset-bottom));
    border-top: 1px solid var(--line);
    background: color-mix(in srgb, var(--surface) 96%, transparent);
  }
  :root[data-theme="theme"] .activity-footer__actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    width: min(70rem, 100%);
    margin: 0 auto;
  }
  :root[data-theme="theme"] .activity-footer__actions > :last-child { margin-left: auto; }
  :root[data-theme="theme"] .activity-footer__mobile-action { display: none; }
  :root[data-theme="theme"] .activity-footer__prompt {
    grid-column: 1 / -1;
    color: var(--text);
    font-size: var(--fs-lg);
    font-weight: 750;
    text-align: center;
  }
  :root[data-theme="theme"] .activity-footer__actions:has(.activity-footer__prompt) {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  :root[data-theme="theme"] .activity-footer__actions:has(.activity-footer__prompt) > :last-child { margin-left: 0; }

  :root[data-theme="theme"] .sheet {
    width: min(640px, calc(100% - 2rem));
    max-height: min(82vh, 760px);
    padding: 0;
    overflow: auto;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    box-shadow: 0 20px 60px rgb(7 29 51 / 0.24);
  }
  :root[data-theme="theme"] .sheet::backdrop { background: rgb(7 29 51 / 0.48); }
  :root[data-theme="theme"] .sheet__header {
    display: grid;
    gap: var(--space-2);
    padding: var(--space-5);
    border-bottom: 1px solid var(--line);
  }
  :root[data-theme="theme"] .sheet__body { display: grid; gap: var(--space-5); padding: var(--space-5); }
  :root[data-theme="theme"] .sheet__actions { display: flex; justify-content: flex-end; gap: var(--space-2); }

  :root[data-theme="theme"] .ready-screen__content {
    display: grid;
    gap: var(--space-5);
    max-width: 720px;
    margin: var(--space-5) auto 0;
    padding: var(--space-7);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
  }
  :root[data-theme="theme"] .ready-screen__facts,
  :root[data-theme="theme"] .result-facts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-block: 1px solid var(--line);
  }
  :root[data-theme="theme"] .ready-screen__facts > div,
  :root[data-theme="theme"] .result-facts > div { display: grid; gap: var(--space-1); padding: var(--space-4) 0; }
  :root[data-theme="theme"] .ready-screen__facts dt,
  :root[data-theme="theme"] .result-facts dt { color: var(--text-soft); font-size: var(--fs-sm); }
  :root[data-theme="theme"] .ready-screen__facts dd,
  :root[data-theme="theme"] .result-facts dd { font-weight: 750; }
  :root[data-theme="theme"] .ready-screen__note {
    padding: var(--space-4);
    border-left: 3px solid var(--accent);
    background: var(--accent-soft);
    font-size: var(--fs-sm);
  }

  @media (max-width: 959px) {
    :root[data-theme="theme"] .collection-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  }

  @media (max-width: 759px) {
    :root[data-theme="theme"] .site-header {
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 0 var(--space-4);
      padding: 0 var(--space-4);
    }
    :root[data-theme="theme"] .site-title { padding-block: var(--space-3); }
    :root[data-theme="theme"] .theme-toggle {
      grid-column: 2;
      grid-row: 1;
      justify-self: end;
    }
    :root[data-theme="theme"] .site-nav {
      display: flex;
      flex-wrap: wrap;
      grid-column: 1 / -1;
      grid-row: 2;
      justify-content: space-between;
      justify-self: stretch;
      gap: 0;
      width: 100%;
    }
    :root[data-theme="theme"] .site-nav a {
      max-inline-size: 100%;
      min-inline-size: 2.75rem;
      padding: var(--space-3) 0;
      flex: 0 0 auto;
      overflow-wrap: anywhere;
      font-size: var(--fs-xs);
      text-align: center;
      white-space: normal;
    }
    :root[data-theme="theme"] .page { padding: var(--space-6) var(--space-4) calc(var(--space-6) + env(safe-area-inset-bottom)); }
    :root[data-theme="theme"] .page-header { margin-bottom: var(--space-5); }
    :root[data-theme="theme"] .collection-grid { grid-template-columns: 1fr; }
    :root[data-theme="theme"] .collection-entry { min-height: 0; }

    :root[data-theme="theme"] .activity-shell { display: block; }
    :root[data-theme="theme"] .activity-sidebar {
      position: sticky;
      z-index: 20;
      top: 0;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: var(--space-2) var(--space-4);
      width: 100%;
      height: auto;
      padding: var(--space-3) var(--space-4);
      overflow: visible;
    }
    :root[data-theme="theme"] .activity-sidebar__identity { align-items: center; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-2); }
    :root[data-theme="theme"] .activity-sidebar h1 { font-size: var(--fs-md); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    :root[data-theme="theme"] .activity-sidebar__label { padding: var(--space-1) var(--space-2); font-size: var(--fs-xs); }
    :root[data-theme="theme"] .activity-sidebar__meta {
      grid-column: 1;
      padding: 0;
      overflow: hidden;
      border: 0;
      font-size: var(--fs-xs);
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    :root[data-theme="theme"] .activity-sidebar__body { display: none; }
    :root[data-theme="theme"] .activity-sidebar__exit {
      grid-column: 2;
      grid-row: 1 / span 2;
      min-height: 2.75rem;
      margin: 0;
      padding: var(--space-2);
      font-size: var(--fs-sm);
    }
    :root[data-theme="theme"] .activity-sidebar__exit::before { display: none; }
    :root[data-theme="theme"] .activity-workspace { min-height: calc(100vh - 5rem); }
    :root[data-theme="theme"] .activity-content { gap: var(--space-5); padding: var(--space-5) var(--space-4); }
    :root[data-theme="theme"] .activity-footer {
      padding: var(--space-3) var(--space-4) calc(var(--space-3) + env(safe-area-inset-bottom));
      background: var(--surface);
    }
    :root[data-theme="theme"] .activity-footer__actions { gap: var(--space-2); }
    :root[data-theme="theme"] .activity-footer__actions > * { min-width: 0; flex: 1; }
    :root[data-theme="theme"] .activity-footer__actions .btn { width: 100%; }
    :root[data-theme="theme"] .activity-footer__actions > :last-child { margin-left: 0; }
    :root[data-theme="theme"] .activity-footer__mobile-action { display: block; }
    :root[data-theme="theme"] .activity-footer__actions:has(.activity-footer__prompt) { grid-template-columns: repeat(2, minmax(0, 1fr)); }

    :root[data-theme="theme"] .sheet {
      inset: auto 0 0;
      width: 100%;
      max-width: none;
      max-height: 88vh;
      margin: 0;
      border-radius: var(--radius) var(--radius) 0 0;
    }
    :root[data-theme="theme"] .sheet__header,
    :root[data-theme="theme"] .sheet__body { padding: var(--space-4); }
    :root[data-theme="theme"] .sheet__actions { display: grid; grid-template-columns: 1fr; }
    :root[data-theme="theme"] .ready-screen__content { margin-top: 0; padding: var(--space-5); }
    :root[data-theme="theme"] .ready-screen__facts { grid-template-columns: 1fr; }
  }

  @media (max-width: 519px) {
    :root[data-theme="theme"] .activity-footer__actions:not(:has(.activity-footer__prompt)) {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    :root[data-theme="theme"] .activity-footer__actions:not(:has(.activity-footer__prompt)) > :last-child:nth-child(odd) { grid-column: 1 / -1; }
  }

}