/*
 * Desktop layout variations for the stacked-card views (deck / chat / admin).
 * Each is scoped to :root[data-layout="vN"] and only applies >= 861px so the
 * mobile single-column layout is never touched. Toggle via the on-page picker.
 * The overlay editor keeps its own .ed-layout; these only restyle .panel-stack.
 */

@media (min-width: 861px) {
  /* ---------- V1 · Balanced (two comfortable columns) ---------- */
  :root[data-layout="v1"] .app-main { max-width: 1360px; }
  :root[data-layout="v1"] .panel-stack {
    display: block; column-count: 2; column-gap: 20px;
  }
  :root[data-layout="v1"] .panel-stack > * {
    break-inside: avoid; margin: 0 0 20px;
  }

  /* ---------- V2 · Dense dashboard (up to three columns) ---------- */
  :root[data-layout="v2"] .app-main { max-width: 1780px; }
  :root[data-layout="v2"] .panel-stack {
    display: block; column-count: 2; column-gap: 14px;
  }
  :root[data-layout="v2"] .panel-stack > * {
    break-inside: avoid; margin: 0 0 14px;
  }
  :root[data-layout="v2"] .card { border-radius: 12px; }
  :root[data-layout="v2"] .card .card-h { padding: 10px 13px; }
  :root[data-layout="v2"] .card .card-b { padding: 13px; }
  @media (min-width: 1360px) {
    :root[data-layout="v2"] .panel-stack { column-count: 3; }
  }

  /* ---------- V3 · Spacious (two roomy columns, soft & rounded) ---------- */
  :root[data-layout="v3"] .app-main { max-width: 1520px; padding: 26px 28px; }
  :root[data-layout="v3"] .panel-stack {
    display: block; column-count: 2; column-gap: 28px;
  }
  :root[data-layout="v3"] .panel-stack > * {
    break-inside: avoid; margin: 0 0 28px;
  }
  :root[data-layout="v3"] .card {
    border-radius: 22px;
    box-shadow: 0 2px 6px rgba(16,24,33,.06), 0 24px 60px rgba(16,24,33,.10);
  }
  :root[data-layout="v3"] .card .card-h { padding: 17px 22px; }
  :root[data-layout="v3"] .card .card-b { padding: 22px; }

  /* ---------- V4 · Bento (auto-fitting grid, hover lift) ---------- */
  :root[data-layout="v4"] .app-main { max-width: 1600px; }
  :root[data-layout="v4"] .panel-stack {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 16px; align-items: start;
  }
  :root[data-layout="v4"] .card {
    transition: transform .16s ease, box-shadow .16s ease;
  }
  :root[data-layout="v4"] .card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(16,24,33,.08), 0 22px 50px rgba(16,24,33,.14);
  }

  /* ---------- V5 · Framed (two columns, accent-tinted headers + rail) ---------- */
  :root[data-layout="v5"] .app-main { max-width: 1440px; }
  :root[data-layout="v5"] .panel-stack {
    display: block; column-count: 2; column-gap: 18px;
  }
  :root[data-layout="v5"] .panel-stack > * {
    break-inside: avoid; margin: 0 0 18px;
  }
  :root[data-layout="v5"] .card {
    border-left: 3px solid var(--accent);
    border-radius: 10px;
    overflow: hidden;
  }
  :root[data-layout="v5"] .card .card-h {
    background: var(--accent-soft);
    border-bottom-color: color-mix(in oklab, var(--accent) 24%, var(--line));
  }
  :root[data-layout="v5"] .card .card-h h2 { color: var(--accent); }
}

/* ---------- the on-page layout picker (desktop only) ---------- */
.layout-switcher {
  position: fixed; left: 16px; bottom: 16px; z-index: 90;
  display: flex; align-items: center; gap: 4px;
  padding: 6px 8px; border-radius: 999px;
  background: color-mix(in oklab, var(--surface) 90%, transparent);
  border: 1px solid var(--line); box-shadow: var(--shadow);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  font-size: .78rem;
}
.layout-switcher .ls-label {
  font-weight: 700; color: var(--muted); padding: 0 6px 0 4px;
  text-transform: uppercase; letter-spacing: .08em; font-size: .66rem;
}
.layout-switcher button {
  font: inherit; font-weight: 700; cursor: pointer; color: var(--ink-2);
  background: transparent; border: 1px solid transparent; border-radius: 999px;
  padding: 5px 9px; line-height: 1;
}
.layout-switcher button:hover { border-color: var(--line-strong); color: var(--ink); }
.layout-switcher button.active {
  background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
}
@media (max-width: 860px) { .layout-switcher { display: none; } }