@layer layout {
  body {
    display: flex;
    min-height: 100vh;
    background: var(--surface);
  }

  .rail {
    width: var(--rail-w);
    flex: none;
    border-right: var(--border-structure);
    padding: var(--space-4) var(--space-2) var(--space-3);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: var(--space-3);
    background: var(--surface);
    position: sticky;
    top: 0;
    height: 100vh;
    z-index: 20;
  }

  .rail__top {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
  }

  .rail__brand {
    padding-inline: var(--space-2);
    display: flex;
    align-items: center;
  }

  .rail__brand-link {
    display: flex;
    align-items: center;
    width: 100%;
    text-decoration: none;
  }

  .rail__logo {
    display: block;
    width: 100%;
    max-width: 170px;
    height: auto;
    aspect-ratio: 300 / 60;
    object-fit: contain;
  }

  .appbar__title {
    font-size: var(--fs-title);
    line-height: var(--lh-title);
    font-weight: 600;
    letter-spacing: -0.01em;
  }

  .rail__nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
  }

  .rail__link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-control);
    color: var(--on-surface-variant);
    font-size: var(--fs-label);
    font-weight: 500;
    text-decoration: none;
  }
  .rail__link:hover {
    background: color-mix(in oklab, var(--on-surface) 8%, transparent);
    color: var(--on-surface);
  }
  .rail__link[aria-current="page"] {
    background: color-mix(in oklab, var(--accent) 14%, transparent);
    color: var(--on-surface);
  }

  .rail__footer {
    padding-top: var(--space-3);
    padding-inline: var(--space-2);
    border-top: var(--border-structure);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
  }

  .rail__status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    min-height: 32px;
  }

  .appbar__status {
    display: flex;
    align-items: center;
    min-width: 0;
  }

  .rail__pause-btn {
    height: 30px;
    padding-inline: var(--space-2);
    font-size: var(--fs-caption);
    color: var(--on-surface-variant);
  }
  .rail__pause-btn:hover {
    color: var(--on-surface);
  }

  .rail__download-btn {
    width: 100%;
    justify-content: center;
    height: 32px;
    font-size: var(--fs-caption);
    text-decoration: none;
  }

  .workspace {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
  }

  .banners {
    padding: var(--space-4) var(--space-6) 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
  }
  .banners:empty {
    display: none;
  }

  main {
    flex: 1;
    padding: var(--space-4) var(--space-6) var(--space-6);
    min-width: 0;
  }
  main:focus {
    outline: none;
  }

  .split {
    display: grid;
    grid-template-columns: minmax(280px, 380px) 1fr;
    gap: var(--space-6);
    align-items: start;
    min-height: 0;
  }

  .toast-host {
    position: fixed;
    inset-inline-end: var(--space-6);
    bottom: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    z-index: 60;
    pointer-events: none;
  }
  .toast-host > * {
    pointer-events: auto;
  }

  @media (max-width: 959px) {
    body {
      flex-direction: column;
    }
    .rail {
      width: 100%;
      height: auto;
      position: sticky;
      bottom: 0;
      top: auto;
      flex-direction: row;
      align-items: center;
      border-right: 0;
      border-top: var(--border-structure);
      padding: var(--space-2);
      order: 10;
    }
    .rail__top {
      flex-direction: row;
      align-items: center;
      flex: 1;
      gap: var(--space-2);
    }
    .rail__brand {
      display: none;
    }
    .rail__nav {
      flex-direction: row;
      flex: 1;
    }
    .rail__link {
      flex: 1;
      justify-content: center;
      flex-direction: column;
      gap: 2px;
      font-size: var(--fs-caption);
    }
    .rail__footer {
      padding-top: 0;
      border-top: 0;
      border-left: 0;
      padding-left: 0;
      display: flex;
      align-items: center;
    }
    .rail__download-btn {
      display: none;
    }
    .workspace {
      order: 1;
    }
    .banners {
      padding: var(--space-3) var(--space-4) 0;
    }
    main {
      padding: var(--space-3) var(--space-4) var(--space-4);
    }
    .split {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 479px) {
    .banners {
      padding: var(--space-2) var(--space-3) 0;
    }
    main {
      padding: var(--space-2) var(--space-3) var(--space-3);
    }
  }
}