/* ==========================================================================
   Shell — rail, top bar, main column, drawer scrim and bottom tab bar, plus
   the brand wordmark the rail and the auth pages share.
   ========================================================================== */

@layer shell {
  .zr-shell {
    display: grid;
    grid-template-columns: var(--zr-rail-w) minmax(0, 1fr);
    min-height: 100vh;
    min-height: 100dvh;
  }
  .zr-shell[data-rail='collapsed'] {
    grid-template-columns: var(--zr-rail-w-collapsed) minmax(0, 1fr);
  }

  /* rail (desktop sidebar) */
  .zr-rail {
    position: sticky;
    top: 0;
    align-self: start;
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    background: var(--zr-rail-bg);
    border-right: 1px solid var(--zr-line);
    overflow: hidden;
  }
  .zr-rail__brand {
    display: flex;
    align-items: center;
    gap: var(--zr-2);
    height: var(--zr-topbar-h);
    padding: 0 var(--zr-3);
    border-bottom: 1px solid var(--zr-line);
    flex: none;
  }
  .zr-rail__logo {
    width: 26px;
    height: 26px;
    flex: none;
  }
  /* The wordmark itself is .zr-wordmark in layer 5 — the auth pages show it
     without a rail. .zr-rail__wordmark is only the hook the collapse rule below
     needs, so it carries no declarations of its own. */
  .zr-rail__nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--zr-2) var(--zr-2) var(--zr-4);
  }
  .zr-rail__group {
    margin-top: var(--zr-3);
  }
  .zr-rail__grouplabel {
    font-size: var(--zr-fs-xs);
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--zr-text-faint);
    padding: var(--zr-2) var(--zr-2) var(--zr-1);
    white-space: nowrap;
  }
  .zr-navitem {
    display: flex;
    align-items: center;
    gap: var(--zr-2);
    padding: 7px var(--zr-2);
    border-radius: var(--zr-r-md);
    color: var(--zr-text-muted);
    font-weight: 500;
    white-space: nowrap;
    transition:
      background var(--zr-dur) var(--zr-ease),
      color var(--zr-dur) var(--zr-ease);
  }
  .zr-navitem:hover {
    background: var(--zr-surface-2);
    color: var(--zr-text);
  }
  .zr-navitem[aria-current='page'] {
    background: var(--zr-brand-soft);
    color: var(--zr-brand-text);
    font-weight: 600;
  }
  .zr-navitem .zr-icon {
    flex: none;
    color: currentColor;
  }
  .zr-navitem__label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .zr-rail__foot {
    flex: none;
    border-top: 1px solid var(--zr-line);
    padding: var(--zr-2);
    display: flex;
    align-items: center;
    gap: var(--zr-1);
  }
  .zr-rail__version {
    font-size: var(--zr-fs-xs);
    color: var(--zr-text-faint);
    margin-left: auto;
    padding-right: var(--zr-1);
    white-space: nowrap;
  }

  /* collapsed rail: icons only. Desktop-scoped: the collapse state lives in a
     cookie, and on a phone the same .zr-rail is the drawer — a drawer without
     labels is unusable, so the cookie must not reach it. */
  @media (min-width: 861px) {
    .zr-shell[data-rail='collapsed'] .zr-rail__wordmark,
    .zr-shell[data-rail='collapsed'] .zr-navitem__label,
    .zr-shell[data-rail='collapsed'] .zr-rail__grouplabel,
    .zr-shell[data-rail='collapsed'] .zr-rail__version {
      display: none;
    }
    .zr-shell[data-rail='collapsed'] .zr-navitem {
      justify-content: center;
      position: relative;
    }

    /* Three 30px buttons need 106px of row; the collapsed rail is 56px wide and
       clips its overflow, so the GitHub and bug-report buttons used to sit
       outside it and could not be clicked. Stack them instead. */
    .zr-shell[data-rail='collapsed'] .zr-rail__foot {
      flex-direction: column;
    }

    /* The queue counts shrink to a dot here — see badges.css, which owns that
       rule: `components` outranks `shell`, so the padding and background of the
       .zr-badge base would win over anything written in this file. */
  }

  /* main column */
  .zr-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
  }
  .zr-topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: var(--zr-2);
    height: var(--zr-topbar-h);
    padding: 0 var(--zr-4);
    background: color-mix(in srgb, var(--zr-surface) 88%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--zr-line);
  }
  .zr-topbar__title {
    font-family: var(--zr-font-brand);
    font-size: var(--zr-fs-lg);
    font-weight: 700;
    letter-spacing: -0.01em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .zr-topbar__crumb {
    color: var(--zr-text-faint);
    font-size: var(--zr-fs-sm);
    white-space: nowrap;
  }
  .zr-topbar__spacer {
    flex: 1;
  }
  .zr-topbar__actions {
    display: flex;
    align-items: center;
    gap: var(--zr-2);
  }
  .zr-view {
    flex: 1;
    width: 100%;
    max-width: var(--zr-view-max);
    padding: var(--zr-4);
    padding-bottom: var(--zr-8);
  }
  .zr-drawer-scrim {
    display: none;
  }
  .zr-tabbar {
    display: none;
  }

  /* brand wordmark — the rail, the setup header and the login card all show it,
     so it is a component rather than a piece of the rail. Callers that need it
     larger override the size; the base is what the rail and the wizard use. */
  .zr-wordmark {
    font-family: var(--zr-font-brand);
    font-weight: 700;
    font-size: var(--zr-fs-lg);
    letter-spacing: -0.01em;
    background: linear-gradient(92deg, var(--zr-brand), var(--zr-ink));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    white-space: nowrap;
  }

  @media (max-width: 860px) {
    .zr-shell,
    .zr-shell[data-rail='collapsed'] {
      grid-template-columns: minmax(0, 1fr);
    }

    /* rail becomes an off-canvas drawer */
    .zr-rail {
      position: fixed;
      inset: 0 auto 0 0;
      width: 264px;
      z-index: 50;
      transform: translateX(-100%);
      transition: transform 200ms var(--zr-ease);
      box-shadow: var(--zr-shadow-lg);
    }
    .zr-shell[data-drawer='open'] .zr-rail {
      transform: none;
    }
    .zr-drawer-scrim {
      display: block;
      position: fixed;
      inset: 0;
      z-index: 40;
      background: var(--zr-scrim-soft);
      opacity: 0;
      pointer-events: none;
      transition: opacity 200ms var(--zr-ease);
    }
    .zr-shell[data-drawer='open'] .zr-drawer-scrim {
      opacity: 1;
      pointer-events: auto;
    }

    .zr-view {
      padding: var(--zr-3);
      padding-bottom: calc(var(--zr-tabbar-h) + var(--zr-6));
    }

    /* bottom tab bar. Below the drawer scrim (40): with the drawer open the
       scrim has to cover the tabs, not float beneath them. */
    .zr-tabbar {
      position: fixed;
      inset: auto 0 0 0;
      z-index: 30;
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      height: var(--zr-tabbar-h);
      padding-bottom: env(safe-area-inset-bottom);
      background: color-mix(in srgb, var(--zr-surface) 94%, transparent);
      backdrop-filter: blur(10px);
      border-top: 1px solid var(--zr-line);
    }
    .zr-tab {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2px;
      color: var(--zr-text-faint);
      font-size: var(--zr-fs-xs);
      font-weight: 500;
      position: relative;
    }
    .zr-tab[aria-current='page'] {
      color: var(--zr-brand);
    }
    .zr-tab__dot {
      position: absolute;
      top: 6px;
      left: 50%;
      margin-left: 5px;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--zr-danger);
    }

    .zr-topbar {
      padding: 0 var(--zr-3);
    }
  }
}