/* R22 — Professional icon color system (dark, muted line icons) */
:root {
  --bg-main: #080d12;
  --bg-sidebar: #0d141c;
  --bg-surface: #111923;
  --bg-surface-2: #151f2b;
  --bg-surface-hover: #1a2532;
  --bg-active: #172638;

  --border-soft: rgba(148, 163, 184, 0.14);
  --border-active: rgba(96, 165, 250, 0.32);

  --text-main: #e5edf6;
  --text-muted: #94a3b8;
  --text-faint: #64748b;

  --icon-default: #7f8da3;
  --icon-muted: #64748b;
  --icon-hover: #a7b4c8;
  --icon-active: #cfe3ff;
  --icon-accent: #72a7ff;

  --accent: #5b8def;
  --accent-soft: rgba(91, 141, 239, 0.13);
  --success: #4ade80;
  --warning: #fbbf24;
  --danger: #f87171;
}

.titi-icon,
[data-lucide]:not(svg) {
  width: 16px;
  height: 16px;
  min-width: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--icon-default);
  stroke: currentColor;
  vertical-align: middle;
  flex-shrink: 0;
}

.titi-icon svg,
.titi-icon-svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
}

.nav-icon,
.tab-icon,
.card-icon,
.action-icon,
.meta-icon {
  width: 16px;
  height: 16px;
  color: var(--icon-default);
}

.card-icon {
  width: 20px;
  height: 20px;
  color: var(--icon-hover);
}

.card-icon svg,
.card-icon .titi-icon-svg {
  width: 20px;
  height: 20px;
}

.workspace-card .card-icon {
  width: 22px;
  height: 22px;
  color: var(--icon-accent);
  opacity: 0.88;
}

.workspace-card .card-icon svg {
  width: 22px;
  height: 22px;
}

.nav-v19-icon,
.rcc-zone-icon,
.ctx-chip-icon,
.mention-icon,
.composer-menu-icon,
.chat-empty-card-icon,
.project-icon.titi-icon-host {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--icon-default);
}

.nav-item:hover .titi-icon,
.nav-v19-item:hover .titi-icon,
.tab-button:hover .titi-icon,
.quick-action:hover .titi-icon,
.rcc-quick-btn:hover .titi-icon,
.rcc-action-btn:hover .titi-icon {
  color: var(--icon-hover);
}

.nav-item.active .titi-icon,
.nav-v19-item.active .titi-icon,
.tab-button.active .titi-icon,
.workspace-card.active .titi-icon {
  color: var(--icon-active);
}

.nav-v19-item.active .nav-v19-icon,
.nav-v19-item.active [data-lucide] {
  color: var(--icon-active);
}

.icon-tile {
  width: 28px;
  height: 28px;
  border-radius: 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(148, 163, 184, 0.08);
  border: 1px solid rgba(148, 163, 184, 0.12);
}

.icon-tile.active {
  background: var(--accent-soft);
  border-color: var(--border-active);
}

.icon-tile .titi-icon,
.icon-tile [data-lucide] {
  width: 18px;
  height: 18px;
}

.msg-act-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  min-height: 28px;
  padding: 4px;
  color: var(--icon-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
}

.msg-act-btn:hover {
  color: var(--icon-hover);
  background: rgba(148, 163, 184, 0.06);
}

.user-avatar-icon.titi-icon-host,
.user-menu-avatar.titi-icon-host {
  width: 20px;
  height: 20px;
  color: var(--icon-hover);
}

.rcc-check-icon .titi-icon,
.rcc-check-icon [data-lucide] {
  width: 14px;
  height: 14px;
}

.review-sev-error .titi-icon { color: var(--danger); }
.review-sev-warn .titi-icon { color: var(--warning); }
.review-sev-ok .titi-icon { color: var(--success); }

/* R38: .icon-btn (project +/organize, sidebar close, inspector rail toggles,
   etc.) had no color rule anywhere, so its glyph/icon content inherited the
   ambient text color (--text-main, near-white in dark mode) instead of the
   muted icon token set above — the "icon trắng/sáng quá" contrast reported
   this round. Scoped to plain (non-primary, non-danger) icon buttons only. */
.icon-btn:not(.btn-primary):not(.btn-danger) {
  color: var(--icon-default);
}
.icon-btn:not(.btn-primary):not(.btn-danger):hover {
  color: var(--icon-hover);
}
.icon-btn:not(.btn-primary):not(.btn-danger)[aria-expanded="true"],
.icon-btn:not(.btn-primary):not(.btn-danger).active {
  color: var(--icon-active);
}