:root {
  /* Legacy aliases → Fluid semantic tokens (tokens.css). Keep names for existing rules. */
  --bg: var(--color-bg);
  --bg2: var(--color-surface);
  --bg3: var(--color-surface-2);
  --border: var(--color-border);
  --text: var(--color-text);
  --muted: var(--color-text-muted);
  --accent: var(--color-brand);
  --accent2: var(--color-brand-strong);
  --user: var(--color-bubble-user);
  --bot: var(--color-bubble-bot);
  --danger: var(--color-danger);
  --ok: var(--color-success);
  --radius: var(--radius-md);
  --font: var(--font-ui);
  --mono: var(--font-mono);
}

* { box-sizing: border-box; }
html, body {
  height: 100%;
  margin: 0;
  max-width: 100%;
  overflow-x: hidden;
}
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

/* Auth */
.auth-view {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(ellipse at 30% 20%, #1a2740 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, #1a2238 0%, transparent 45%),
    var(--bg);
}
.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px 32px;
  text-align: center;
  box-shadow: 0 24px 64px rgba(0,0,0,.45);
}
.logo {
  width: 56px; height: 56px; margin: 0 auto 16px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), #8b7cf7);
  display: grid; place-items: center;
  font-weight: 700; font-size: 1.4rem; color: #0b1020;
}
.auth-card h1 { margin: 0 0 8px; font-size: 1.35rem; font-weight: 600; }
.auth-methods { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin: 14px 0 10px; padding: 4px; border: 1px solid var(--border); border-radius: 12px; }
.auth-methods.hidden { display: none; }
.auth-method { border: 0; border-radius: 8px; padding: 9px 10px; background: transparent; color: var(--muted); cursor: pointer; }
.auth-method.active { background: var(--surface); color: var(--text); box-shadow: 0 1px 4px rgba(0,0,0,.25); }
.sub { color: var(--muted); margin: 0 0 24px; font-size: .95rem; line-height: 1.45; }
#pin-form { display: flex; flex-direction: column; gap: 12px; }
#pin-input {
  font-size: 1.75rem;
  letter-spacing: .4em;
  text-align: center;
  padding: 14px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text);
  outline: none;
}
#pin-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(110,168,254,.2); }
#pin-submit, #send-btn, .accent-btn {
  background: var(--accent2);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 12px 18px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
#pin-submit:hover, #send-btn:hover, .accent-btn:hover { filter: brightness(1.08); }
#pin-submit:disabled, #send-btn:disabled, .accent-btn:disabled { opacity: .5; cursor: not-allowed; }
.error { color: var(--danger); min-height: 1.4em; margin: 12px 0 0; font-size: .9rem; }

/* Layout — Fluid Slice 1: .chat-view.nl-shell uses tokens.css shell grid */
.chat-view:not(.nl-shell) {
  display: grid;
  grid-template-columns: clamp(var(--nl-roster-min, 220px), 18vw, var(--nl-roster-preferred, 260px)) minmax(var(--nl-chat-min, 280px), 1fr);
  height: 100vh;
  height: 100dvh;
  max-width: 100vw;
  overflow: hidden;
}
.chat-view.nl-shell {
  /* display/height/overflow from tokens.css .nl-shell; reinforce here */
  height: 100vh;
  height: 100dvh;
  max-width: 100vw;
  overflow: hidden;
}
.sidebar,
.nl-shell__roster.sidebar {
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: var(--space-4, 16px) var(--space-3, 12px);
  gap: var(--space-3, 10px);
  min-height: 0;
  overflow: hidden;
}
.sidebar-head {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 8px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-head .mark {
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #8b7cf7);
  display: grid; place-items: center;
  font-weight: 700; color: #0b1020;
}
.sidebar-head strong { display: block; font-size: .95rem; }
.sidebar-head small { color: var(--muted); font-size: .75rem; }

.mode-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 6px;
  flex-shrink: 0;
}
.mode-tab {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 10px;
  padding: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: .85rem;
}
.mode-tab.active {
  color: var(--text);
  border-color: var(--accent);
  background: var(--color-brand-soft, rgba(110,168,254,.18));
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 0;
  flex: 1;
}
.files-sidebar { flex: 2; }
.section-label {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  padding: 0 4px;
}
.section-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.label-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 2px;
  max-height: 120px;
  overflow: auto;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--muted);
  font-size: .78rem;
  cursor: pointer;
  user-select: none;
}
.chip .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
}
.chip.active {
  color: var(--text);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(110,168,254,.25);
}
.chip.all { font-weight: 600; }

.new-label-form {
  display: flex;
  gap: 6px;
}
.new-label-form input {
  flex: 1;
  min-width: 0;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text);
  font: inherit;
  font-size: .8rem;
  outline: none;
}
.new-label-form input:focus { border-color: var(--accent); }

.file-list {
  list-style: none; margin: 0; padding: 0;
  flex: 1; overflow: auto;
}
.file-list li {
  padding: var(--space-3, 12px);
  border-radius: var(--radius-md, 12px);
  cursor: pointer;
  color: var(--color-text-muted, var(--muted));
  font-size: var(--text-sm, 13px);
  min-height: 48px;
  box-sizing: border-box;
}
.file-list li.active, .file-list li:hover {
  background: var(--color-surface-hover, var(--bg3));
  color: var(--color-text, var(--text));
}

.roster-root {
  display: flex;
  flex-direction: column;
  gap: var(--space-2, 8px);
  flex: 1;
  overflow: auto;
  min-height: 0;
}
.roster-category {
  border: 1px solid transparent;
  border-radius: 10px;
}
.roster-cat-header {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  user-select: none;
}
.roster-cat-header::-webkit-details-marker { display: none; }
.roster-cat-header::marker { content: ""; }
.roster-cat-header:hover {
  color: var(--text);
  background: var(--bg3);
}
.roster-chevron {
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform .15s ease;
  flex-shrink: 0;
  opacity: .7;
}
.roster-category:not([open]) .roster-chevron {
  transform: rotate(-90deg);
}
.roster-bots {
  list-style: none;
  margin: 0;
  padding: var(--space-1, 4px) 0 var(--space-2, 8px);
}
.roster-bot {
  display: flex;
  align-items: center;
  gap: var(--space-3, 12px);
  min-height: 56px;
  padding: 10px 16px;
  border-radius: var(--radius-sm, 8px);
  cursor: pointer;
  color: var(--color-text-muted, var(--muted));
  font-size: var(--text-sm, 13px);
  line-height: 1.25;
  box-sizing: border-box;
}
.roster-bot:hover {
  background: var(--color-surface-hover, var(--bg3));
  color: var(--color-text, var(--text));
}
.roster-bot.active {
  background: var(--color-brand-soft, rgba(110,168,254,.18));
  color: var(--color-text, var(--text));
  box-shadow: inset 2px 0 0 var(--color-brand, var(--accent));
}
.roster-empty {
  padding: 8px 10px;
  color: var(--muted);
  font-size: .78rem;
  opacity: .75;
  font-style: italic;
  cursor: default;
}
.file-list li .fname {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-list li .fmeta {
  font-size: .7rem;
  color: var(--muted);
  opacity: .85;
}

.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 10px;
  padding: 10px;
  cursor: pointer;
  font-size: .85rem;
}
.ghost:hover:not(:disabled) { color: var(--text); border-color: var(--muted); }
.ghost:disabled { opacity: .4; cursor: not-allowed; }
.ghost.tiny { padding: 4px 8px; font-size: .85rem; line-height: 1; }
.upload-btn { cursor: pointer; display: inline-flex; align-items: center; }

#security-btn { flex-shrink: 0; margin-top: auto; }
#logout-btn { flex-shrink: 0; }

.security-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(0, 0, 0, .72);
}
.security-modal.hidden { display: none; }
.security-card {
  width: min(560px, 100%);
  max-height: 90vh;
  overflow: auto;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: 0 24px 80px rgba(0, 0, 0, .45);
}
.security-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.security-head h2 { margin: 0; }
.security-details { display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; }
.security-details dt { color: var(--muted); }
.security-details dd { margin: 0; overflow-wrap: anywhere; }
.security-card label { display: grid; gap: 6px; margin: 16px 0; color: var(--muted); }
.security-card input { min-height: 44px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--bg); color: var(--text); }
.recovery-codes { padding: 14px; border-radius: 10px; background: var(--bg); color: var(--text); line-height: 1.7; user-select: all; }

.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg);
  min-height: 0;
}
.panel {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.chat-header, .editor-header {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-3, 12px);
  padding: var(--space-3, 12px) var(--gutter-desktop, 16px) var(--space-3, 12px);
  border-bottom: 1px solid var(--color-border, var(--border));
  background: var(--color-surface, var(--bg2));
  flex-shrink: 0;
}
.chat-header-top, .editor-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.chat-header h2, .editor-header h2 {
  margin: 0;
  font-size: var(--text-lg, 17px);
  font-weight: var(--weight-semibold, 600);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  color: var(--color-text, var(--text));
}
.status { color: var(--ok); font-size: .85rem; margin-left: auto; }
.dirty { color: var(--accent); font-size: .9rem; }
.muted-meta { color: var(--muted); font-size: .75rem; margin-left: auto; }

.chat-toolbar, .editor-toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
#search-input {
  flex: 1;
  min-width: 140px;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text);
  font: inherit;
  font-size: .92rem;
  outline: none;
}
#search-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(110,168,254,.15); }
.toolbar-btn { padding: 8px 12px; flex-shrink: 0; }
.accent-btn.toolbar-btn { padding: 8px 12px; border-radius: 10px; font-size: .85rem; }

.messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6, 24px) var(--gutter-desktop, 16px);
  display: flex;
  flex-direction: column;
  gap: var(--space-4, 16px);
}
.bubble-row {
  display: flex;
  max-width: min(720px, 92%);
}
.bubble-row.user { align-self: flex-end; justify-content: flex-end; }
.bubble-row.assistant { align-self: flex-start; }
.bubble {
  padding: var(--space-3, 12px) var(--space-4, 16px);
  border-radius: var(--radius-md, var(--radius));
  line-height: var(--lh-body, 1.5);
  font-size: var(--text-md, 15px);
  white-space: pre-wrap;
  word-break: break-word;
  box-shadow: var(--shadow-sm);
}
.bubble-row.user .bubble {
  background: var(--color-bubble-user, var(--user));
  border-bottom-right-radius: var(--space-1, 4px);
}
.bubble-row.assistant .bubble {
  background: var(--color-bubble-bot, var(--bot));
  border: 1px solid var(--color-border, var(--border));
  border-bottom-left-radius: var(--space-1, 4px);
}
.meta {
  font-size: var(--text-xs, 11px);
  color: var(--color-text-muted, var(--muted));
  margin-top: var(--space-1, 4px);
  padding: 0 var(--space-1, 4px);
}
.bubble-row.user .meta { text-align: right; }
.bubble-row.search-hide { display: none; }
.bubble mark {
  background: var(--color-brand-soft, rgba(110, 168, 254, 0.35));
  color: inherit;
  border-radius: 3px;
  padding: 0 2px;
}

.compose {
  display: flex;
  gap: var(--space-3, 12px);
  padding: var(--space-4, 16px) var(--gutter-desktop, 16px) var(--space-5, 20px);
  border-top: 1px solid var(--color-border, var(--border));
  background: var(--color-surface, var(--bg2));
  align-items: flex-end;
  flex-shrink: 0;
  position: sticky;
  bottom: 0;
  z-index: 6;
  padding-bottom: max(var(--space-5, 20px), var(--safe-bottom, env(safe-area-inset-bottom, 0px)));
}
#compose-input {
  flex: 1;
  resize: none;
  max-height: 160px;
  min-height: 52px;
  padding: var(--space-3, 12px) var(--space-3, 12px);
  border-radius: var(--radius-lg, 16px);
  border: 1px solid var(--color-border, var(--border));
  background: var(--color-surface-2, var(--bg3));
  color: var(--color-text, var(--text));
  font: inherit;
  font-size: var(--text-md, 15px);
  line-height: 1.4;
  outline: none;
}
#compose-input:focus { border-color: var(--color-brand, var(--accent)); box-shadow: 0 0 0 3px var(--color-brand-soft); }
#send-btn { flex-shrink: 0; min-width: 88px; border-radius: var(--radius-md, 12px); }

/* Editor */
.ask-box {
  display: flex;
  gap: var(--space-2, 8px);
  padding: var(--space-3, 12px) var(--gutter-desktop, 16px);
  border-bottom: 1px solid var(--color-border, var(--border));
  background: var(--color-surface-2, var(--bg3));
  align-items: center;
}
#ask-message {
  flex: 1;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text);
  font: inherit;
  outline: none;
}
.editor-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  padding: 40px;
  text-align: center;
  gap: 8px;
}
.editor-empty .hint { font-size: .85rem; max-width: 420px; line-height: 1.45; }

.editor-wrap {
  flex: 1;
  display: grid;
  grid-template-columns: auto 1fr;
  min-height: 0;
  overflow: hidden;
  background: var(--color-bg, var(--bg));
}
.gutter {
  padding: var(--space-4, 16px) var(--space-2, 8px) var(--space-4, 16px) var(--space-3, 12px);
  text-align: right;
  font-family: var(--font-mono, var(--mono));
  font-size: var(--text-sm, 13px);
  line-height: 1.55;
  color: var(--color-text-muted, var(--muted));
  background: var(--color-surface, var(--bg2));
  border-right: 1px solid var(--color-border, var(--border));
  user-select: none;
  overflow: hidden;
  white-space: pre;
}
.editor {
  width: 100%;
  height: 100%;
  border: none;
  resize: none;
  padding: 16px 18px;
  background: transparent;
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  outline: none;
  overflow: auto;
  tab-size: 2;
  white-space: pre;
}
.scratch-status {
  padding: 8px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg2);
  color: var(--muted);
  font-size: .8rem;
  flex-shrink: 0;
}

@media (max-width: 767px) {
  .chat-view { grid-template-columns: 1fr; }
  .messages { padding: 16px; }
  .compose { padding: 12px 14px max(16px, env(safe-area-inset-bottom, 0px)); }
}


/* ---- Apps ---- */
.apps-sidebar { flex: 2; }
.apps-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.apps-list li button {
  width: 100%;
  text-align: left;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
}
.apps-list li button.active {
  border-color: var(--accent);
  background: #1e2a40;
}
.apps-list li button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.apps-list .app-title { display: block; font-weight: 600; font-size: .9rem; }
.apps-list .app-desc { display: block; color: var(--muted); font-size: .72rem; margin-top: 2px; }
.apps-hint { color: var(--muted); font-size: .72rem; margin: 8px 0 0; }
.apps-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.apps-title-row { display: flex; align-items: baseline; gap: 10px; min-width: 0; }
.apps-title-row h2 { margin: 0; font-size: 1.05rem; }
.apps-toolbar { display: flex; gap: 6px; flex-shrink: 0; }
.apps-frame-wrap {
  flex: 1;
  min-height: 0;
  display: flex;
  background: #0a0e18;
}
.apps-frame {
  flex: 1;
  width: 100%;
  height: 100%;
  border: 0;
  background: #111;
}
#panel-apps.panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
}
#panel-apps.panel.hidden { display: none; }


/* Slice A — presence + inbox */
.presence-row {
  display: flex;
  align-items: center;
  gap: var(--space-2, 8px);
  padding: var(--space-1, 4px) var(--space-2, 8px) var(--space-1, 4px);
  flex-shrink: 0;
}
.presence-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2, 8px);
  padding: var(--space-1, 4px) var(--space-3, 12px);
  border-radius: var(--radius-pill, 999px);
  border: 1px solid var(--color-border, var(--border));
  background: var(--color-surface-2, var(--bg3));
  font-size: var(--text-xs, 11px);
  color: var(--color-text-muted, var(--muted));
  max-width: 100%;
  min-width: 0;
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  cursor: default;
}
.presence-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-text-muted, var(--muted));
  flex-shrink: 0;
}
.presence-chip.status-online .presence-dot { background: var(--color-success, var(--ok)); box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-success) 25%, transparent); }
.presence-chip.status-working .presence-dot,
.presence-chip.status-degraded .presence-dot { background: var(--color-warning); box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-warning) 25%, transparent); }
.presence-chip.status-waking .presence-dot { background: var(--color-info); box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-info) 25%, transparent); animation: nl-wake-pulse 1.2s ease-in-out infinite; }
.presence-chip.status-idle .presence-dot { background: var(--color-text-muted); box-shadow: none; opacity: .85; }
.presence-chip.status-offline .presence-dot { background: var(--color-danger, var(--danger)); box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-danger) 22%, transparent); }
.presence-chip.status-online { color: var(--color-success, var(--ok)); }
.presence-chip.status-working,
.presence-chip.status-degraded { color: var(--color-warning); }
.presence-chip.status-waking { color: var(--color-info); }
.presence-chip.status-idle { color: var(--color-text-muted); }
.presence-chip.status-offline { color: var(--color-danger, var(--danger)); }
#presence-label { overflow: hidden; text-overflow: ellipsis; }
@keyframes nl-wake-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .45; }
}
@media (prefers-reduced-motion: reduce) {
  .presence-chip.status-waking .presence-dot { animation: none; }
}

.inbox-toggle {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text);
  font-size: .75rem;
  font-weight: 600;
  cursor: pointer;
}
.inbox-toggle:hover { border-color: var(--accent); }
.inbox-toggle.open { border-color: var(--accent); background: #1e2a40; }
.inbox-badge {
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 5px;
  border-radius: 999px;
  background: var(--accent2);
  color: #fff;
  font-size: .7rem;
  display: inline-grid;
  place-items: center;
  line-height: 1;
}
.inbox-badge.zero { background: var(--border); color: var(--muted); }

.inbox-panel {
  margin: 0 4px 4px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg3);
  max-height: 240px;
  overflow: auto;
  flex-shrink: 0;
}
.inbox-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px 4px;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--muted);
  position: sticky;
  top: 0;
  background: var(--bg3);
}
.inbox-list {
  list-style: none;
  margin: 0;
  padding: 4px 6px 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.inbox-empty { margin: 0 10px 10px; font-size: .8rem; }
.inbox-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  background: var(--bg2);
}
.inbox-item-title {
  font-size: .8rem;
  line-height: 1.35;
  margin: 0 0 4px;
  word-break: break-word;
}
.inbox-item-meta {
  font-size: .68rem;
  color: var(--muted);
  margin: 0 0 6px;
}
.inbox-item-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.inbox-item-actions button {
  font-size: .7rem;
  padding: 4px 8px;
  border-radius: 8px;
}

/* Slice B — session memory + scratch diff */
.session-memory {
  margin: var(--space-2, 8px) 0;
  padding: var(--space-2, 8px) var(--space-3, 12px);
  border: 1px solid var(--color-border, var(--border));
  border-radius: var(--radius-md, 12px);
  background: var(--color-surface-2, var(--bg3));
  display: flex;
  flex-direction: column;
  gap: var(--space-2, 8px);
  box-shadow: var(--shadow-none);
}
.session-memory-head {
  display: flex;
  align-items: center;
  gap: var(--space-2, 8px);
  cursor: pointer;
  user-select: none;
  min-height: 28px;
}
.session-memory-head .section-label {
  margin: 0;
  flex: 1;
}
.sm-field {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: .72rem;
  color: var(--muted);
}
.sm-field input,
.sm-field textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  padding: 6px 8px;
  font: inherit;
  font-size: .8rem;
  resize: vertical;
}
.sm-field input:focus,
.sm-field textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.diff-panel {
  margin: 0 12px 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0d1117;
  overflow: hidden;
  flex-shrink: 0;
  max-height: 40%;
  display: flex;
  flex-direction: column;
}
.diff-panel.hidden { display: none; }
.diff-panel-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  background: var(--bg3);
  flex-wrap: wrap;
}
.diff-panel-head strong { font-size: .8rem; }
.diff-actions {
  margin-left: auto;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.diff-view {
  margin: 0;
  padding: 10px 12px;
  overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .75rem;
  line-height: 1.35;
  white-space: pre;
  color: #c9d1d9;
  min-height: 4rem;
  max-height: 18rem;
}
.diff-line { display: inline; }
.diff-add { color: #3dd68c; background: rgba(61, 214, 140, .08); }
.diff-del { color: #ff6b7a; background: rgba(255, 107, 122, .08); }
.diff-hunk { color: #6ea8fe; }


/* ---- Slice C: split view + mobile chrome (F5 + F8) ---- */
html, body {
  overflow-x: hidden;
  max-width: 100vw;
}

.workspace-chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
  flex-shrink: 0;
  min-width: 0;
  flex-wrap: wrap;
  z-index: 8;
}

.nav-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  padding: 8px 12px;
}

.chrome-modes {
  display: none;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

.chrome-mode {
  flex: 1;
  min-height: 44px;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  font-weight: 600;
  font-size: .85rem;
}

.chrome-mode.active {
  color: var(--text);
  border-color: var(--accent);
  background: #1e2a40;
}

.chrome-layout {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  flex-wrap: wrap;
}

.layout-btn {
  min-height: 34px;
  white-space: nowrap;
}

.layout-btn[aria-pressed="true"] {
  color: var(--text);
  border-color: var(--accent);
  background: #1e2a40;
}

.chrome-status { display: none; }

.sidebar-backdrop {
  display: none;
}

/* Wide split: Chat | Files or Chat | Apps */
.main.split-on {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  grid-template-rows: auto minmax(0, 1fr);
  min-height: 0;
}

.main.split-on > .workspace-chrome {
  grid-column: 1 / -1;
}

.main.split-on > .panel {
  min-width: 0;
  min-height: 0;
  height: 100%;
  border-right: 1px solid var(--border);
}

.main.split-on > .panel:last-child {
  border-right: none;
}

.main.split-on #panel-chat .messages {
  /* slightly tighter in split */
  padding: 16px;
}

.main:not(.split-on) {
  display: flex;
  flex-direction: column;
}

/* When split, secondary sidebars share space with roster */
.sidebar.split-secondary #chat-sidebar {
  flex: 1;
}
.sidebar.split-secondary #files-sidebar,
.sidebar.split-secondary #apps-sidebar {
  flex: 1.4;
}

@media (min-width: 768px) and (max-width: 1099px) {
  /* Mid width: sidebar mode tabs suffice; hide empty chrome bar */
  .workspace-chrome { display: none; }
}

@media (min-width: 768px) {
  .workspace-chrome .chrome-modes { display: none; }
  .nav-toggle { display: none; }
}

@media (max-width: 1099px) {
  /* Split only useful on wide viewports */
  .chrome-layout { display: none; }
  .main.split-on {
    display: flex;
    flex-direction: column;
  }
  .main.split-on > .panel {
    border-right: none;
  }
}

@media (max-width: 767px) {
  .nav-toggle { display: inline-flex; }
  .chrome-modes { display: flex; }
  .chrome-layout { display: none !important; }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--nl-drawer-width, min(86vw, 360px));
    max-width: min(86vw, 360px);
    z-index: 50;
    transform: translateX(-105%);
    transition: transform var(--motion-drawer, 200ms) var(--ease-out, ease);
    display: flex;
    box-shadow: var(--shadow-md, 8px 0 32px rgba(0,0,0,.4));
    padding-top: var(--safe-top, env(safe-area-inset-top, 0px));
    padding-bottom: var(--safe-bottom, env(safe-area-inset-bottom, 0px));
  }

  .chat-view.nav-open .sidebar {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: var(--color-overlay, rgba(0,0,0,.45));
    z-index: 45;
  }
  .sidebar-backdrop.hidden { display: none !important; }

  /* Larger tap targets */
  .mode-tab,
  .chrome-mode,
  .roster-bot,
  .apps-list li button,
  .file-list li button,
  .inbox-toggle,
  .toolbar-btn,
  .ghost.tiny {
    min-height: 44px;
  }

  .ghost.tiny {
    padding: 10px 12px;
  }

  #compose-input {
    font-size: 16px; /* avoid iOS zoom */
    min-height: 44px;
    padding: 12px 14px;
  }

  #send-btn {
    min-width: 72px;
    min-height: 48px;
    padding: 12px 16px;
    font-size: 1.05rem;
  }

  .chat-header, .editor-header, .apps-header {
    padding: 10px 14px 12px;
  }

  .editor-toolbar, .apps-toolbar, .chat-toolbar {
    gap: 6px;
  }

  .editor-toolbar .toolbar-btn,
  .apps-toolbar .toolbar-btn {
    min-height: 40px;
    padding: 8px 10px;
  }

  /* Apps / Desktop usable — no horizontal overflow traps */
  #panel-apps,
  .apps-frame-wrap,
  .apps-frame,
  #panel-files,
  .editor-wrap,
  .editor {
    max-width: 100%;
  }

  .apps-frame-wrap {
    min-height: 50vh;
    -webkit-overflow-scrolling: touch;
  }

  .apps-frame {
    touch-action: manipulation;
  }

  .editor-toolbar {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 2px;
  }

  .session-memory {
    max-height: 28vh;
    overflow: auto;
  }

  .bubble-row {
    max-width: 96%;
  }
}

@media (min-width: 1100px) {
  .chrome-layout { display: flex; }
}

/* ===== Slice D: selection toolbar + vault ===== */
.sel-toolbar {
  position: fixed;
  z-index: 1200;
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--bg2, #1a2438);
  border: 1px solid var(--border, #2a3548);
  border-radius: 10px;
  box-shadow: 0 8px 28px rgba(0,0,0,.45);
}
.sel-toolbar.hidden { display: none; }
.sel-btn {
  border: none;
  background: transparent;
  color: var(--text, #e8eefc);
  font: inherit;
  font-size: .8rem;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
}
.sel-btn:hover { background: var(--bg3, #243044); }
.sel-btn.accent {
  background: #3d5afe;
  color: #fff;
}
.sel-btn.accent:hover { background: #536dfe; }

.sel-label-picker {
  position: fixed;
  inset: 0;
  z-index: 1300;
  background: rgba(0,0,0,.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.sel-label-picker.hidden { display: none; }
.sel-label-picker-card {
  background: var(--bg2, #1a2438);
  border: 1px solid var(--border, #2a3548);
  border-radius: 14px;
  padding: 14px 16px;
  width: min(360px, 100%);
  box-shadow: 0 12px 40px rgba(0,0,0,.5);
}
.sel-label-picker-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.sel-label-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}
.sel-label-list .chip {
  cursor: pointer;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1400;
  background: #1e2a44;
  color: #e8eefc;
  border: 1px solid #3a4a66;
  border-radius: 10px;
  padding: 10px 16px;
  font-size: .88rem;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
  max-width: min(420px, 92vw);
}
.toast.hidden { display: none; }

.vault-sidebar .vault-search {
  width: 100%;
  margin: 6px 0 8px;
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid var(--border, #2a3548);
  background: var(--bg3, #121820);
  color: var(--text, #e8eefc);
  font: inherit;
  font-size: .85rem;
  outline: none;
}
.vault-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 40vh;
  overflow: auto;
}
.vault-list li {
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  margin-bottom: 2px;
}
.vault-list li:hover { background: var(--bg3, #243044); }
.vault-list li.active { background: #2a3a5c; }
.vault-list .vault-item-title {
  font-size: .88rem;
  font-weight: 600;
}
.vault-list .vault-item-tags {
  font-size: .72rem;
  color: var(--muted, #8b97ad);
  margin-top: 2px;
}
.vault-empty { margin: 8px 4px; }

#panel-vault {
  display: flex;
  flex-direction: column;
  min-height: 0;
}
#panel-vault.hidden { display: none; }
.vault-header {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border, #2a3548);
  background: #1a2438;
}
.vault-title-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.vault-title-row h2 { margin: 0; font-size: 1.1rem; }
.vault-toolbar { display: flex; gap: 6px; flex-shrink: 0; }
.vault-editor-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px 20px;
  min-height: 0;
  overflow: auto;
}
.vault-editor-wrap.hidden { display: none; }
.vault-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: .8rem;
  color: var(--muted, #8b97ad);
}
.vault-field input,
.vault-field textarea {
  font: inherit;
  font-size: .92rem;
  color: var(--text, #e8eefc);
  background: var(--bg3, #0c0e12);
  border: 1px solid var(--border, #2a3548);
  border-radius: 10px;
  padding: 10px 12px;
  outline: none;
}
.vault-body-field { flex: 1; min-height: 0; }
.vault-body-field textarea {
  flex: 1;
  min-height: 220px;
  resize: vertical;
  font-family: var(--mono, ui-monospace, monospace);
  font-size: 13px;
  line-height: 1.5;
}


/* Chat minimize */
.chat-min-btn { margin-left: auto; min-width: 36px; }
.main.chat-minimized #panel-chat { display: none !important; }
.main.chat-minimized.split-on { grid-template-columns: minmax(0, 1fr); }
.chat-restore-bar {
  position: absolute;
  left: var(--space-3, 12px);
  bottom: var(--space-4, 16px);
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2, 8px);
  height: 44px;
  min-height: 40px;
  border: 1px solid var(--color-border, var(--border));
  background: var(--color-surface, var(--bg2));
  color: var(--color-text, var(--text));
  border-radius: var(--radius-pill, 999px);
  padding: 0 var(--space-4, 16px);
  font-weight: var(--weight-semibold, 600);
  font-size: var(--text-sm, 13px);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.chat-restore-bar:hover { border-color: var(--color-brand, var(--accent)); background: var(--color-brand-soft); }
.chat-restore-bar.hidden { display: none; }
.main { position: relative; }

/* ===== Fluid Slice 1 — overflow + shell bridge ===== */
#app {
  height: 100%;
  max-width: 100vw;
  overflow-x: hidden;
}

@media (max-width: 767px) {
  .chat-view,
  .chat-view.nl-shell {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1400px) {
  .chat-view:not(.nl-shell--workspace-open) {
    grid-template-columns:
      clamp(var(--nl-roster-min, 220px), 16vw, var(--nl-roster-preferred, 260px))
      minmax(var(--nl-chat-min, 280px), 1fr);
  }
}

/* Compose: keep existing padding; ensure bottom safe-area uses token */
.compose {
  padding-bottom: max(20px, var(--safe-bottom, env(safe-area-inset-bottom, 0px)));
}


/* ============================================================
 * Fluid Slice 2 — Pixel bottom nav + roster drawer + compose dock
 * Spec §§9–10, §13 (mobile), §21 Slice 2 — mobile ≤767 ONLY
 * ============================================================ */

.nl-roster-close {
  margin-left: auto;
  display: none;
  min-width: 44px;
  min-height: 44px;
  font-size: 1.35rem;
  line-height: 1;
  color: var(--color-text-muted, var(--muted));
}

.nl-roster-search-wrap {
  display: none;
  padding: 0 var(--space-4, 16px) var(--space-3, 12px);
  flex-shrink: 0;
}

.nl-roster-search {
  width: 100%;
  box-sizing: border-box;
  padding: 10px 12px;
  border-radius: var(--radius-md, 12px);
  border: 1px solid var(--color-border, var(--border));
  background: var(--color-surface-2, var(--bg3));
  color: var(--color-text, var(--text));
  font: inherit;
  font-size: var(--text-sm, 13px);
  outline: none;
}

.nl-roster-search:focus {
  border-color: var(--color-brand, var(--accent));
}

.nl-chat-back {
  display: none;
  min-width: 40px;
  min-height: 40px;
  font-size: 1.5rem;
  line-height: 1;
  padding: 4px 8px;
  color: var(--color-brand, var(--accent));
  flex-shrink: 0;
}

/* Bottom nav — hidden on desktop/tablet; Pixel only */
.nl-bottom-nav {
  display: none;
}

.nl-tools-backdrop,
.nl-tools-sheet {
  display: none;
}

@media (max-width: 767px) {
  /* ---- Bottom navigation ---- */
  .nl-bottom-nav {
    display: flex;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 40;
    height: calc(var(--nl-bottom-nav-height, 64px) + var(--safe-bottom, env(safe-area-inset-bottom, 0px)));
    padding: 0 12px var(--safe-bottom, env(safe-area-inset-bottom, 0px));
    box-sizing: border-box;
    align-items: stretch;
    justify-content: space-around;
    gap: 4px;
    background: var(--color-surface, var(--bg2));
    border-top: 1px solid var(--color-border, var(--border));
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.18);
  }

  .nl-bottom-nav__item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    min-height: 0;
    height: 100%;
    max-height: var(--nl-bottom-nav-height, 64px);
    padding: 6px 4px;
    margin: 0;
    border: none;
    background: transparent;
    color: var(--color-text-muted, var(--muted));
    border-radius: var(--radius-pill, 999px);
    cursor: pointer;
    font: inherit;
    -webkit-tap-highlight-color: transparent;
  }

  .nl-bottom-nav__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 28px;
    border-radius: var(--radius-pill, 999px);
  }

  .nl-bottom-nav__icon svg {
    width: 22px;
    height: 22px;
  }

  .nl-bottom-nav__label {
    font-size: 11px;
    font-weight: var(--weight-regular, 400);
    letter-spacing: 0.01em;
    line-height: 1.2;
  }

  .nl-bottom-nav__item.is-selected {
    color: var(--color-brand, var(--accent));
  }

  .nl-bottom-nav__item.is-selected .nl-bottom-nav__icon {
    background: var(--color-brand-soft, rgba(110, 168, 254, 0.18));
  }

  .nl-bottom-nav__item.is-selected .nl-bottom-nav__label {
    font-weight: var(--weight-semibold, 600);
  }

  .nl-bottom-nav__item:focus-visible {
    outline: 2px solid var(--color-brand, var(--accent));
    outline-offset: 2px;
  }

  /* Shell / main leave room for bottom nav */
  .chat-view.nl-shell {
    padding-bottom: 0;
  }

  .chat-view .main.nl-shell__chat {
    padding-bottom: calc(var(--nl-bottom-nav-height, 64px) + var(--safe-bottom, env(safe-area-inset-bottom, 0px)));
    box-sizing: border-box;
  }

  /* Compose dock sits above bottom nav; nav owns safe-area */
  .compose {
    position: sticky;
    bottom: 0;
    z-index: 6;
    padding: 10px 12px 10px;
    padding-bottom: 10px;
    margin: 0;
    border-top: 1px solid var(--color-border, var(--border));
    background: var(--color-surface, var(--bg2));
  }

  #panel-chat .compose {
    /* sticky within panel; panel already padded for nav */
    bottom: 0;
  }

  /* Mobile chat header — 56px + safe-top feel */
  .chat-header {
    position: sticky;
    top: 0;
    z-index: 7;
    padding-top: max(10px, var(--safe-top, env(safe-area-inset-top, 0px)));
    background: var(--color-bg, var(--bg));
    min-height: var(--nl-chat-header-height, 56px);
    box-sizing: border-box;
  }

  .nl-chat-back {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .chat-header-top {
    align-items: center;
    gap: 6px;
  }

  .chat-header-top h2 {
    flex: 1;
    min-width: 0;
    font-size: var(--text-lg, 17px);
    font-weight: var(--weight-semibold, 600);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* Hide legacy mobile chrome tabs — bottom nav replaces them */
  .workspace-chrome .chrome-modes {
    display: none !important;
  }

  .workspace-chrome {
    padding: 6px 10px;
    gap: 6px;
  }

  /* Roster drawer header + search */
  .nl-roster-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nl-roster-search-wrap {
    display: block;
  }

  .sidebar-head {
    align-items: center;
    gap: 10px;
  }

  .sidebar-head-text {
    flex: 1;
    min-width: 0;
  }

  /* Drawer above bottom nav visually; keep full height */
  .sidebar {
    z-index: 55;
    padding-bottom: var(--safe-bottom, env(safe-area-inset-bottom, 0px));
  }

  .sidebar-backdrop {
    z-index: 50;
  }

  /* ---- Tools sheet ---- */
  .nl-tools-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 60;
    background: var(--color-overlay, rgba(0, 0, 0, 0.62));
  }

  .nl-tools-backdrop.hidden {
    display: none !important;
  }

  .nl-tools-sheet {
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 65;
    max-height: min(72vh, 520px);
    padding: 8px 16px calc(12px + var(--safe-bottom, env(safe-area-inset-bottom, 0px)));
    background: var(--color-surface, var(--bg2));
    border-radius: var(--radius-xl, 20px) var(--radius-xl, 20px) 0 0;
    box-shadow: var(--shadow-lg, 0 10px 30px rgba(0, 0, 0, 0.48));
    transform: translateY(0);
    transition: transform var(--motion-sheet, 220ms) var(--ease-out, ease);
  }

  .nl-tools-sheet.hidden {
    display: none !important;
  }

  .nl-tools-sheet__handle {
    width: 36px;
    height: 4px;
    border-radius: 2px;
    background: var(--color-border, var(--border));
    margin: 4px auto 10px;
  }

  .nl-tools-sheet__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
  }

  .nl-tools-sheet__head strong {
    font-size: var(--text-lg, 17px);
    font-weight: var(--weight-semibold, 600);
  }

  .nl-tools-sheet__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nl-tools-tile {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    min-height: 88px;
    padding: 16px;
    border-radius: var(--radius-md, 12px);
    border: 1px solid var(--color-border, var(--border));
    background: var(--color-surface-2, var(--bg3));
    color: var(--color-text, var(--text));
    text-align: left;
    cursor: pointer;
    font: inherit;
  }

  .nl-tools-tile:active,
  .nl-tools-tile:focus-visible {
    border-color: var(--color-brand, var(--accent));
    background: var(--color-brand-soft, rgba(110, 168, 254, 0.18));
    outline: none;
  }

  .nl-tools-tile__icon {
    font-size: 1.25rem;
    line-height: 1;
    margin-bottom: 4px;
  }

  .nl-tools-tile__label {
    font-weight: var(--weight-semibold, 600);
    font-size: var(--text-md, 15px);
  }

  .nl-tools-tile__hint {
    font-size: var(--text-xs, 11px);
    color: var(--color-text-muted, var(--muted));
  }

  /* When tools sheet open, bottom nav stays visible under sheet */
  .chat-view.tools-open .nl-bottom-nav {
    /* still visible; sheet sits above */
  }

  /* Roster rows filter helper */
  .roster-bot.nl-roster-hidden,
  .roster-category.nl-roster-hidden {
    display: none !important;
  }
}

/* Desktop/tablet: ensure Slice 2 chrome never leaks */
@media (min-width: 768px) {
  .nl-bottom-nav,
  .nl-tools-backdrop,
  .nl-tools-sheet,
  .nl-chat-back,
  .nl-roster-close,
  .nl-roster-search-wrap {
    display: none !important;
  }
}

/* ============================================================
 * Fluid Slice 3 — Visual component migration (token recipes)
 * Spec §§10–17, §21 Slice 3 — overrides only; Slice 2 nav untouched
 * ============================================================ */

/* Remaining active-surface hardcodes → brand-soft */
.mode-tab.active,
.chrome-mode.active,
.layout-btn[aria-pressed="true"],
.apps-list li button.active,
.inbox-toggle.open {
  background: var(--color-brand-soft, rgba(110, 168, 254, 0.18));
  border-color: var(--color-brand, var(--accent));
  color: var(--color-text, var(--text));
}

/* Roster row recipe reinforce */
.roster-bot {
  min-height: 56px;
  padding: 10px var(--space-4, 16px);
  border-radius: var(--radius-sm, 8px);
  font-size: var(--text-md, 15px);
}
.roster-bot .roster-bot-state,
.roster-bot small {
  font-size: var(--text-xs, 11px);
  color: var(--color-text-muted, var(--muted));
  font-weight: var(--weight-regular, 400);
}

/* Bubbles: soft geometry 14–16px */
.bubble {
  border-radius: var(--radius-lg, 16px);
  font-size: var(--text-md, 15px);
  line-height: var(--lh-body, 1.5);
  box-shadow: var(--shadow-none, none);
}
.bubble-row.user .bubble {
  background: var(--color-bubble-user, var(--user));
}
.bubble-row.assistant .bubble {
  background: var(--color-bubble-bot, var(--bot));
  border: 1px solid var(--color-border, var(--border));
}
.bubble mark {
  background: var(--color-mark, rgba(110, 168, 254, 0.35));
}

/* Session brief subordinate */
.session-memory {
  border-radius: var(--radius-sm, 8px);
  background: var(--color-surface-2, var(--bg3));
  border-color: var(--color-border, var(--border));
}
.session-memory.is-collapsed .session-memory-body {
  display: none;
}
.session-memory-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1, 4px);
  background: transparent;
  border: none;
  color: var(--color-text-muted, var(--muted));
  font: inherit;
  font-size: var(--text-xs, 11px);
  font-weight: var(--weight-semibold, 600);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  padding: 0;
  flex: 1;
  text-align: left;
}
.session-memory-toggle:hover { color: var(--color-text, var(--text)); }
.session-memory-toggle::before {
  content: "▸";
  display: inline-block;
  transition: transform var(--motion-panel, 200ms) var(--ease-out, ease);
}
.session-memory:not(.is-collapsed) .session-memory-toggle::before {
  transform: rotate(90deg);
}

/* Minimized chat pill */
.chat-restore-bar {
  height: 44px;
  border-radius: var(--radius-pill, 999px);
  background: var(--color-surface-2, var(--bg3));
  border: 1px solid var(--color-border, var(--border));
  color: var(--color-text, var(--text));
  box-shadow: var(--shadow-sm);
  font-weight: var(--weight-semibold, 600);
  font-size: var(--text-sm, 13px);
}
.chat-restore-bar:hover {
  border-color: var(--color-brand, var(--accent));
  background: var(--color-brand-soft);
}
.main.chat-minimized .chat-restore-bar {
  bottom: calc(var(--space-4, 16px) + var(--safe-bottom, 0px));
}

/* Files surfaces */
#panel-files .editor-header,
#panel-files .scratch-status,
.ask-box {
  background: var(--color-surface, var(--bg2));
  border-color: var(--color-border, var(--border));
}
.ask-box { background: var(--color-surface-2, var(--bg3)); }
.editor-wrap { background: var(--color-bg, var(--bg)); }
.gutter {
  color: var(--color-text-muted, var(--muted));
  background: var(--color-surface, var(--bg2));
  border-color: var(--color-border, var(--border));
}
.file-list li.active,
.file-list li:hover {
  background: var(--color-surface-hover, var(--bg3));
  color: var(--color-text, var(--text));
}

/* Playground tile + label chip */
.nl-tools-tile[data-tool="playground"]:focus-visible,
.nl-tools-tile[data-tool="playground"]:active {
  border-color: var(--color-brand, var(--accent));
  background: var(--color-brand-soft);
}
.chip.active {
  background: var(--color-brand-soft, var(--bg3));
  border-color: var(--color-brand, var(--accent));
}

/* Compose focus ring */
#compose-input:focus {
  border-color: var(--color-brand, var(--accent));
  box-shadow: 0 0 0 3px var(--color-focus-ring, rgba(110, 168, 254, 0.2));
}
#send-btn { border-radius: var(--radius-md, 12px); }

/* Vault header (workspace-adjacent) */
.vault-header {
  background: var(--color-surface, var(--bg2));
  border-color: var(--color-border, var(--border));
}
.vault-list li.active {
  background: var(--color-brand-soft, var(--bg3));
}

@media (max-width: 767px) {
  .messages {
    padding: var(--space-4, 16px) var(--gutter-mobile, 20px);
    gap: var(--space-3, 12px);
  }
  .compose {
    padding: var(--space-2, 8px) var(--space-3, 12px);
  }
  #compose-input {
    min-height: 52px;
    border-radius: var(--radius-lg, 16px);
  }
  .main.chat-minimized .chat-restore-bar {
    bottom: calc(
      var(--nl-bottom-nav-height, 64px) + var(--safe-bottom, 0px) + var(--space-3, 12px)
    );
  }
  .session-memory { /* Pixel default collapsed via JS class */
    margin: var(--space-2, 8px) 0;
  }
}

@media (min-width: 768px) {
  .bubble-row { max-width: min(720px, 92%); }
}


/* ============================================================
 * Fluid Slice 4 — Desktop adaptive panels
 * Spec §§18–19, §21 Slice 4
 * Breakpoints: 768–1099 overlays | 1100–1399 roster+chat | 1400+ 3-pane
 * ============================================================ */

.nl-shell {
  --nl-roster-w: var(--nl-roster-preferred, 260px);
  --nl-workspace-w: var(--nl-workspace-preferred, 360px);
}

/* Resize handles */
.nl-resize-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 6px;
  cursor: col-resize;
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  z-index: 8;
}
.nl-shell__roster.sidebar,
.nl-shell__workspace {
  position: relative;
}
#nl-resize-roster,
.nl-resize-handle:not(.nl-resize-handle--workspace) {
  right: -3px;
}
#nl-resize-workspace,
.nl-resize-handle--workspace {
  left: -3px;
}
.nl-resize-handle::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 2px;
  width: 2px;
  background: var(--color-border);
  opacity: .6;
  transition: background var(--motion-panel, 200ms), opacity var(--motion-panel, 200ms);
}
.nl-resize-handle:hover::after,
.nl-resize-handle:focus-visible::after,
.nl-shell.nl-resizing .nl-resize-handle::after {
  background: var(--color-brand);
  opacity: 1;
}
.nl-resize-handle:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: -2px;
}
.nl-resize-handle[hidden],
.nl-resize-handle.hidden { display: none !important; }

/* Collapse rails / controls */
.nl-panel-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  min-height: 28px;
  padding: 4px 6px;
  border-radius: var(--radius-sm, 8px);
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  cursor: pointer;
  font: inherit;
  font-size: var(--text-sm, 13px);
  line-height: 1;
}
.nl-panel-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-brand);
  background: var(--color-brand-soft);
}

.nl-shell { position: relative; }
.nl-collapsed-rail {
  display: none;
  position: absolute;
  top: 0;
  bottom: 0;
  z-index: 9;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  align-items: center;
  justify-content: center;
  gap: var(--space-2, 8px);
  width: 36px;
  min-width: 36px;
  padding: var(--space-3, 12px) 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: var(--text-xs, 11px);
  font-weight: var(--weight-semibold, 600);
  letter-spacing: .04em;
  text-transform: uppercase;
  box-sizing: border-box;
}
#nl-roster-rail {
  left: 0;
}
.nl-collapsed-rail--workspace,
#nl-workspace-rail {
  right: 0;
  left: auto;
  border-right: none;
  border-left: 1px solid var(--color-border);
  transform: none;
  writing-mode: vertical-rl;
}

/* Workspace panel chrome */
.nl-shell__workspace {
  display: none;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
}
.nl-workspace-head {
  display: flex;
  align-items: center;
  gap: var(--space-2, 8px);
  padding: var(--space-3, 12px) var(--space-4, 16px);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}
.nl-workspace-head strong {
  flex: 1;
  font-size: var(--text-md, 15px);
  font-weight: var(--weight-semibold, 600);
}
.nl-workspace-body {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: var(--space-3, 12px);
  display: flex;
  flex-direction: column;
  gap: var(--space-2, 8px);
}
.nl-workspace-tile {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  width: 100%;
  padding: var(--space-3, 12px) var(--space-4, 16px);
  border-radius: var(--radius-md, 12px);
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  color: var(--color-text);
  text-align: left;
  cursor: pointer;
  font: inherit;
}
.nl-workspace-tile:hover {
  border-color: var(--color-brand);
  background: var(--color-brand-soft);
}
.nl-workspace-tile__label {
  font-weight: var(--weight-semibold, 600);
  font-size: var(--text-sm, 13px);
}
.nl-workspace-tile__hint {
  font-size: var(--text-xs, 11px);
  color: var(--color-text-muted);
}

/* Desktop ≥768: show panel toggles in chrome */
@media (min-width: 768px) {
  .nl-panel-toggle { display: inline-flex; }

  .nl-shell {
    grid-template-columns:
      minmax(0, var(--nl-roster-w))
      minmax(var(--nl-chat-min, 280px), 1fr);
  }

  /* Roster collapsed → absolute rail + pad */
  .nl-shell.nl-roster-collapsed {
    grid-template-columns: minmax(var(--nl-chat-min, 280px), 1fr);
    padding-left: 36px;
  }
  .nl-shell.nl-roster-collapsed .nl-shell__roster.sidebar {
    display: none !important;
  }
  .nl-shell.nl-roster-collapsed #nl-roster-rail {
    display: flex;
  }
  .nl-shell.nl-roster-collapsed #nl-resize-roster {
    display: none !important;
  }
}

/* Tablet 768–1099: 2-pane / overlays — roster collapse uses rail; no workspace pane */
@media (min-width: 768px) and (max-width: 1099px) {
  .nl-shell__workspace,
  #nl-workspace-rail,
  #nl-resize-workspace,
  #btn-workspace-toggle {
    display: none !important;
  }
  .nl-shell.nl-shell--workspace-open {
    grid-template-columns:
      minmax(0, var(--nl-roster-w))
      minmax(var(--nl-chat-min, 280px), 1fr);
  }
  .nl-shell.nl-roster-collapsed.nl-shell--workspace-open {
    grid-template-columns: 36px minmax(var(--nl-chat-min, 280px), 1fr);
  }
}

/* Desktop 1100–1399: roster + chat (workspace optional overlay via tools, not 3-pane) */
@media (min-width: 1100px) and (max-width: 1399px) {
  .nl-shell {
    grid-template-columns:
      minmax(0, var(--nl-roster-w))
      minmax(var(--nl-chat-min, 280px), 1fr);
  }
  .nl-shell__workspace,
  #nl-workspace-rail,
  #nl-resize-workspace {
    display: none !important;
  }
  .nl-shell.nl-shell--workspace-open {
    /* keep 2-pane under 1400 — do not force unusable 3-pane */
    grid-template-columns:
      minmax(0, var(--nl-roster-w))
      minmax(var(--nl-chat-min, 280px), 1fr);
  }
}

/* Wide ≥1400: optional 3-pane */
@media (min-width: 1400px) {
  .nl-shell.nl-shell--workspace-open:not(.nl-roster-collapsed):not(.nl-workspace-collapsed) {
    grid-template-columns:
      minmax(0, var(--nl-roster-w))
      minmax(var(--nl-chat-min, 280px), 1fr)
      minmax(0, var(--nl-workspace-w));
  }
  .nl-shell.nl-shell--workspace-open:not(.nl-workspace-collapsed) .nl-shell__workspace {
    display: flex !important;
  }
  .nl-shell.nl-shell--workspace-open.nl-roster-collapsed:not(.nl-workspace-collapsed) {
    grid-template-columns:
      minmax(var(--nl-chat-min, 280px), 1fr)
      minmax(0, var(--nl-workspace-w));
    padding-left: 36px;
    padding-right: 0;
  }
  .nl-shell.nl-shell--workspace-open.nl-workspace-collapsed:not(.nl-roster-collapsed) {
    grid-template-columns:
      minmax(0, var(--nl-roster-w))
      minmax(var(--nl-chat-min, 280px), 1fr);
    padding-right: 36px;
  }
  .nl-shell.nl-shell--workspace-open.nl-roster-collapsed.nl-workspace-collapsed {
    grid-template-columns: minmax(var(--nl-chat-min, 280px), 1fr);
    padding-left: 36px;
    padding-right: 36px;
  }
  .nl-shell.nl-workspace-collapsed #nl-workspace-slot {
    display: none !important;
  }
  .nl-shell.nl-workspace-collapsed #nl-workspace-rail {
    display: flex;
  }
  .nl-shell.nl-workspace-collapsed #nl-resize-workspace {
    display: none !important;
  }
  .nl-shell:not(.nl-shell--workspace-open) #nl-resize-workspace,
  .nl-shell:not(.nl-shell--workspace-open) #nl-workspace-rail {
    display: none !important;
  }
}

/* Mobile: hide Slice 4 chrome */
@media (max-width: 767px) {
  .nl-panel-toggle,
  .nl-resize-handle,
  .nl-collapsed-rail,
  .nl-shell__workspace {
    display: none !important;
  }
}

/* While resizing, disable iframe pointer events */
.nl-shell.nl-resizing,
.nl-shell.nl-resizing * {
  cursor: col-resize !important;
  user-select: none !important;
}
.nl-shell.nl-resizing iframe {
  pointer-events: none !important;
}


/* Slice 4 — handle positioning inside panels (no extra grid tracks) */
.nl-shell__roster.sidebar {
  position: relative;
}
#nl-resize-roster {
  position: absolute;
  top: 0;
  right: -3px;
  bottom: 0;
  width: 6px;
  z-index: 6;
}
#nl-resize-workspace {
  position: absolute;
  /* placed as sibling before workspace; pin to workspace left via sticky shell */
}

/* Slice 4 — resize handles inside panels */
.nl-shell__roster.sidebar,
.nl-shell__workspace { position: relative; }
.nl-shell__roster.sidebar > #nl-resize-roster {
  position: absolute; top: 0; bottom: 0; right: -3px; width: 6px; z-index: 8;
}
.nl-shell__workspace > #nl-resize-workspace {
  position: absolute; top: 0; bottom: 0; left: -3px; width: 6px; z-index: 8;
}


/* Apps immersive / full-window mode (Desktop + Android) */
.apps-frame-wrap.is-fullscreen {
  position: fixed !important;
  inset: 0 !important;
  z-index: 9000;
  background: #0b0f14;
  margin: 0 !important;
  border-radius: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  max-height: none !important;
}
.apps-frame-wrap.is-fullscreen .apps-frame {
  width: 100% !important;
  height: 100% !important;
  border: 0 !important;
}
.apps-fs-chrome {
  position: fixed;
  top: 10px;
  right: 10px;
  z-index: 9001;
  display: flex;
  gap: 8px;
}
.apps-fs-chrome.hidden { display: none !important; }
body.apps-immersive { overflow: hidden; }
.apps-toolbar .hidden { display: none !important; }