/* Nova desktop layer v1 — loaded after app.css. Fixes desktop layout + refines the look. */
@media (min-width: 821px) {
  :root { --r: 14px; --r-sm: 10px; --line: color-mix(in srgb, var(--bd) 70%, transparent); }

  /* ── Shell: the grid row must be exactly one viewport tall, never content-tall ── */
  html, body { height: 100%; overflow: hidden; }
  .app-shell { height: 100dvh; grid-template-rows: minmax(0, 1fr); overflow: hidden; }
  .app-shell > nav { height: 100dvh; min-height: 0; overflow-y: auto; overflow-x: hidden; padding: 16px 12px 10px; gap: 10px; scrollbar-width: thin; scrollbar-color: var(--bd) transparent; }
  .app-shell > .workspace { height: 100dvh; min-height: 0; overflow: hidden; }
  .workspace > main { overflow-y: auto; overflow-x: hidden; padding: clamp(16px, 1.8vw, 28px) clamp(18px, 2.6vw, 44px); gap: 16px; }

  /* ── Sidebar ── */
  .nav-brand { padding: 4px 6px 12px; }
  .nav-groups { gap: 6px; padding: 0; }
  .nav-group { gap: 2px; }
  .nav-group > small { padding: 8px 10px 4px; font-size: 11px; letter-spacing: .04em; opacity: .75; }
  .app-shell > nav .nav-group button { min-height: 38px; height: 38px; padding: 0 10px; border-radius: 10px; font-size: 13.5px; gap: 10px; transition: background .15s, color .15s; }
  .app-shell > nav .nav-group button:hover:not(.on) { background: color-mix(in srgb, var(--tx) 6%, transparent); color: var(--tx); }
  .nav-footer { position: sticky; bottom: 0; margin-top: auto; padding-top: 8px; background: linear-gradient(to top, var(--s) 70%, transparent); }

  /* ── Top bar ── */
  .appbar { height: 60px; }

  /* ── Chat page: header compact, workgrid fills remaining height, composer pinned ── */
  .chatpage { height: 100%; max-height: 100%; min-height: 0; gap: 12px; max-width: 1440px; }
  .chathead { padding: 0 0 12px; gap: 12px; align-items: center; border-bottom: 1px solid var(--line); }
  .chatbrand { gap: 12px; align-items: center; }
  .chatbrand .brandmark { width: 40px; height: 40px; border-radius: 12px; font-size: 18px; }
  .chathead h1 { font-size: clamp(18px, 1.5vw, 22px); line-height: 1.3; letter-spacing: -.02em; }
  .chathead .eyebrow { font-size: 11px; margin-bottom: 2px; }
  .chathead p { display: none; }
  .chat-actions { gap: 8px; }
  .chat-actions button { height: 38px; padding: 0 14px; border-radius: 10px; font-size: 13px; }

  .chat-workgrid { flex: 1 1 0; min-height: 0; grid-template-columns: minmax(0, 1fr) clamp(250px, 21vw, 320px); grid-template-rows: minmax(0, 1fr); gap: 16px; overflow: hidden; }
  .chat-main { height: 100%; min-height: 0; overflow: hidden; gap: 10px; }
  .chat-main > .chat-tools { flex: none; min-height: 0; padding: 8px 12px; border-radius: var(--r); box-shadow: none; }
  .chat-main > .msgs { flex: 1 1 0; min-height: 0; overflow-y: auto; overflow-x: hidden; padding: 6px clamp(6px, 1.5vw, 20px); scrollbar-width: thin; scrollbar-color: var(--bd) transparent; }
  .chat-main > .composer, .chat-main > form.composer { flex: none; }
  .chat-rail { min-height: 0; height: 100%; overflow-y: auto; overflow-x: hidden; gap: 12px; padding-inline-end: 2px; scrollbar-width: thin; scrollbar-color: var(--bd) transparent; }
  .chat-rail > * { flex: none; border-radius: var(--r); box-shadow: none; }

  /* Welcome screen: centred in the message area, no wasted gutters */
  .welcome { margin: auto; padding: 8px; }
  .welcome-orbit { width: 56px; height: 56px; font-size: 26px; border-radius: 18px; margin-bottom: 10px; }
  .welcome > p { margin: 4px auto 16px; }
  .prompt-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .prompt-card { min-height: 0; }
  .model-controls { min-width: 0; flex-wrap: nowrap; }
  .model-controls input { flex: 1 1 140px; min-width: 120px; max-width: 280px; }
  .model-controls select { flex: 1 1 180px; min-width: 160px; }
  .chat-tools { gap: 10px; flex-wrap: wrap; }

  /* ── Cards & forms (all other pages) ── */
  .card { border-radius: var(--r); box-shadow: 0 1px 0 #ffffff08 inset; }
  input, select, textarea { border-radius: var(--r-sm); transition: border-color .15s, box-shadow .15s; }
  input:focus-visible, select:focus-visible, textarea:focus-visible { outline: none; border-color: var(--ac); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ac) 22%, transparent); }
  button.pri { transition: filter .15s, transform .05s; }
  button.pri:hover { filter: brightness(1.08); }
  button.pri:active { transform: translateY(1px); }
  .workspace > main > :is(.premium-page, .toolpage, .page) { width: 100%; margin-inline: auto; }
}

@media (min-width: 821px) and (max-width: 1180px) {
  .app-shell { grid-template-columns: 216px minmax(0, 1fr); }
  .app-shell > nav .nav-group button { font-size: 13px; }
  .chat-tools-right { flex-wrap: wrap; min-width: 0; }
  .chat-tools-right .row { flex-wrap: wrap; }
  .chat-tools-right .row > * { flex: 0 1 auto; }
  .model-controls { flex: 1 1 100%; }
}
@media (min-width: 821px) {
  .app-shell > nav .nav-group button span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
}

/* Short desktop windows (laptops): tighten vertical rhythm further */
@media (min-width: 821px) and (max-height: 760px) {
  .appbar { height: 52px; }
  .chathead { padding-bottom: 8px; }
  .chatbrand .brandmark { width: 34px; height: 34px; }
  .app-shell > nav .nav-group button { height: 34px; min-height: 34px; }
  .nav-group > small { padding-top: 4px; }
}

@media (min-width: 1240px) { .prompt-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (min-width: 821px) and (max-height: 820px) { .welcome-foot { display: none; } .welcome h2 { font-size: 22px; } .prompt-card p { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; } }

/* Very large screens: keep line lengths readable */
@media (min-width: 1700px) {
  .chatpage { max-width: 1600px; }
  .app-shell { grid-template-columns: 300px minmax(0, 1fr); }
}