/* ==========================================================================
   Chatper · dock.css
   Zona de trabajo acoplable (SPEC §6.7): columnas, pestañas, separadores, cabecera de sala por
   panel, panel de salas en modo compacto, arrastre de pestañas y cajón móvil.
   Solo usa los tokens de base.css.
   ========================================================================== */

.dock-host { display: flex; flex: 1; min-height: 0; }
.dock { display: flex; flex: 1; min-width: 0; min-height: 0; }

.dock-workspace {
  display: flex;
  flex: 1;
  min-width: 0;
  min-height: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
}

/* --------------------------------------------------------------------------
   Columnas
   -------------------------------------------------------------------------- */
.dock-column {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--bg);
}
.dock-column-body { position: relative; flex: 1; min-height: 0; overflow: hidden; }

/* Escritorio (SPEC §9.1): cada columna es un panel redondeado separado por un hueco (--gutter) que
   deja ver el fondo de la app. La jerarquía va por el TIPO del panel visible (data-kind):
   - chat y salas: plano principal, con sombra exterior suave (--panel-shadow);
   - gráficos y archivos: bandeja hundida (--tray con sombra interior, ver «Paneles»). */
.dock.is-desktop .dock-workspace {
  gap: var(--gutter);
  padding: var(--gutter);
  background: var(--bg);
}
.dock.is-desktop .dock-column {
  --col-radius: calc(var(--radius-lg) - 1px); /* radio interior (dentro del borde de 1 px) */
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  box-shadow: var(--panel-shadow);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.dock.is-desktop .dock-column.is-tray {
  border-color: color-mix(in srgb, var(--border-strong) 55%, var(--border));
  box-shadow: none;
}
.dock.is-desktop .dock-tabbar { border-radius: var(--col-radius) var(--col-radius) 0 0; }
.dock.is-desktop .dock-column-body {
  border-radius: 0 0 var(--col-radius) var(--col-radius);
  isolation: isolate; /* los z-index del contenido (y la sombra de la bandeja) no salen de la columna */
}

/* Separador: zona de agarre que ocupa el hueco entre dos columnas (y 3 px de cada una). La raya
   que aparece al pasar el ratón va centrada en el hueco. */
.dock-splitter {
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(-1px - var(--gutter) - 3px);
  z-index: 6;
  width: calc(var(--gutter) + 6px);
  cursor: col-resize;
  touch-action: none;
}
.dock-splitter::after {
  content: "";
  position: absolute;
  top: var(--radius-lg);
  bottom: var(--radius-lg);
  left: 50%;
  width: 3px;
  margin-left: -1.5px;
  border-radius: 3px;
  background: transparent;
  transition: background-color var(--dur) var(--ease);
}
.dock-splitter:hover::after { background: color-mix(in srgb, var(--accent) 45%, transparent); transition-delay: 120ms; }
.dock-splitter.is-active::after { background: var(--accent); transition-delay: 0s; }
.dock-splitter:focus-visible { outline: none; }
.dock-splitter:focus-visible::after { background: var(--accent); box-shadow: var(--focus-ring); }

/* --------------------------------------------------------------------------
   Barra de pestañas
   -------------------------------------------------------------------------- */
.dock-tabbar {
  display: flex;
  align-items: stretch;
  gap: 0.15rem;
  flex-shrink: 0;
  height: 2.55rem;
  padding: 0 0.3rem 0 0.35rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  container-type: inline-size;
}
.dock-tabs {
  display: flex;
  align-items: stretch;
  gap: 0.1rem;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}
.dock-tabs::-webkit-scrollbar { display: none; }
/* Escritorio: las pestañas ocupan lo que necesitan y el desplegable va justo detrás. */
.dock.is-desktop .dock-tabs { flex: 0 1 auto; }

.dock-tab {
  position: relative;
  display: flex;
  align-items: center;
  flex: 0 1 auto;
  min-width: 2.5rem;
  max-width: 15rem;
  margin-top: 0.3rem;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  color: var(--text-muted);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.dock.is-desktop .dock-tab { touch-action: none; }
.dock-tab:hover { color: var(--text); background: var(--surface-2); }
.dock-tab.is-selected { color: var(--text); }
.dock-tab.is-selected::after {
  content: "";
  position: absolute;
  left: 0.45rem;
  right: 0.45rem;
  bottom: -1px;
  height: 2px;
  border-radius: 2px;
  background: var(--border-strong);
}
/* SPEC §19.9 (sustituye a §19.8): pestañas como las de Chrome, en escritorio. La franja de las pestañas lleva un
   toque del acento (más en el panel con el foco); la pestaña visible de cada panel toma el color de lo que tiene
   justo debajo (--tab-join) y se funde con ello: sin raya debajo y con dos «pies» curvos hacia fuera. */
.dock-column { --tab-join: var(--bg-elevated); --tabstrip: color-mix(in srgb, var(--accent) 6%, var(--bg)); }
.dock-column.is-focused { --tabstrip: color-mix(in srgb, var(--accent) 12%, var(--bg)); }
:root[data-theme="dark"] .dock-column { --tabstrip: color-mix(in srgb, var(--accent) 6%, color-mix(in srgb, var(--bg) 78%, #000)); }
:root[data-theme="dark"] .dock-column.is-focused { --tabstrip: color-mix(in srgb, var(--accent) 13%, color-mix(in srgb, var(--bg) 78%, #000)); }
.dock.is-desktop .dock-tabbar,
.dock.is-desktop .dock-column.is-focused > .dock-tabbar {
  position: relative;
  background: var(--tabstrip);
  border-bottom: 0; /* la raya la pinta ::after, por debajo de la pestaña visible */
}
.dock.is-desktop .dock-tabbar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--border);
  pointer-events: none;
}
.dock.is-desktop .dock-tabs { position: relative; z-index: 1; padding: 0 0.6rem; } /* sitio para los pies de la primera y la última */
.dock.is-desktop .dock-tab { margin-top: 0.35rem; border-radius: 0.6rem 0.6rem 0 0; }
.dock.is-desktop .dock-tab:hover:not(.is-selected) { background: color-mix(in srgb, var(--text) 7%, transparent); }
.dock.is-desktop .dock-tab.is-selected,
.dock.is-desktop .dock-tab.is-selected:hover {
  background: var(--tab-join);
  box-shadow: none;
  color: var(--text);
}
.dock.is-desktop .dock-tab.is-selected .dock-tab-title { font-weight: 600; }
.dock.is-desktop .dock-tab.is-selected::before,
.dock.is-desktop .dock-tab.is-selected::after {
  content: "";
  position: absolute;
  bottom: 0;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 0;
  pointer-events: none;
}
.dock.is-desktop .dock-tab.is-selected::before {
  left: -0.6rem;
  background: radial-gradient(circle at 0 0, transparent 0.6rem, var(--tab-join) calc(0.6rem + 0.5px));
}
.dock.is-desktop .dock-tab.is-selected::after,
.dock.is-desktop .dock-tab.is-selected.is-focused::after {
  left: auto;
  right: -0.6rem;
  background: radial-gradient(circle at 100% 0, transparent 0.6rem, var(--tab-join) calc(0.6rem + 0.5px));
}
/* Para el panel sin el foco, el subrayado del móvil sigue igual (más arriba); en escritorio no hay subrayado. */
.dock-tab.is-drag-source { opacity: 0.4; }

/* El panel que se arrastra entero */
.dock-column.is-drag-source { opacity: 0.55; transition: opacity var(--dur) var(--ease); }

.dock-tab-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
  min-width: 0;
  height: 100%;
  padding: 0 0.6rem;
  border: 0;
  border-radius: inherit;
  background: none;
  color: inherit;
  font-size: 0.8625rem;
  font-weight: 560;
  white-space: nowrap;
  -webkit-user-select: none;
  user-select: none;
}
.dock-tab-btn:focus-visible { outline: none; box-shadow: inset var(--focus-ring); }
.dock-tab-icon { display: inline-flex; flex-shrink: 0; }
.dock-tab-icon svg { width: 1rem; height: 1rem; }
.dock-tab.is-selected .dock-tab-icon { color: var(--accent-text); }
.dock-tab-title { min-width: 0; overflow: hidden; text-overflow: ellipsis; }
/* Imagen propia de la sala en una pestaña fijada (SPEC §9.10), en el sitio del emoji del título */
.dock-tab-roomicon { display: inline-flex; flex-shrink: 0; }
.dock-tab-roomicon[hidden] { display: none; }
.dock-tab-roomicon .room-emoji { box-shadow: none; }
.dock-tab-pin { display: inline-flex; flex-shrink: 0; color: var(--text-subtle); }
.dock-tab-badge { min-width: 1.1rem; height: 1.1rem; padding: 0 0.3rem; font-size: 0.625rem; }

/* «×» de las pestañas: SOLO en móvil y solo en las pestañas extra temporales (hilos o salas
   fijadas). En escritorio, la «×» de la columna cierra el panel entero (SPEC §16.7, .dock-column-close)
   y cada pestaña se cierra desde su menú (SPEC §9.5). */
.dock-tab-close {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 1.35rem;
  height: 1.35rem;
  margin: 0 0.3rem 0 -0.25rem;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--text-subtle);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.dock-tab-close:hover { background: var(--surface-3); color: var(--text); }
.dock-tab-close[hidden] { display: none; }

/* «×» del panel (SPEC §16.7): a la derecha del todo de la barra; cierra la columna con todas sus pestañas. */
.dock-column-close.btn {
  --btn-h: 1.7rem;
  align-self: center;
  flex-shrink: 0;
  margin-left: auto;
  color: var(--text-subtle);
}
.dock-column-close.btn:hover:not(:disabled) { background: var(--danger-soft); color: var(--danger); }
.dock-column-close[hidden] { display: none; }

/* Opciones de cada pestaña (SPEC §18.10): «⌄» pegado a su nombre; siempre en la pestaña visible y, en las
   demás, al pasar por encima o con el foco. Ahí están mover, fijar, abrir al lado y «Cerrar pestaña». */
.dock-tab-menu {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 1.3rem;
  height: 1.3rem;
  margin: 0 0.3rem 0 -0.35rem;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--text-subtle);
  opacity: 0;
  transition: opacity var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.dock-tab-menu svg { width: 0.875rem; height: 0.875rem; }
.dock-tab.is-selected .dock-tab-menu,
.dock-tab:hover .dock-tab-menu,
.dock-tab:focus-within .dock-tab-menu,
.dock-tab-menu[aria-expanded="true"] { opacity: 1; }
.dock-tab-menu:hover,
.dock-tab-menu[aria-expanded="true"] { background: var(--surface-3); color: var(--text); }
.dock-tab-menu:focus-visible { outline: none; box-shadow: var(--focus-ring); opacity: 1; }
.dock.is-mobile .dock-tab-menu { display: none; }
/* «+» discreto tras las pestañas (SPEC §11.3): nueva pestaña de archivos de la sala */
.dock-tab-add.btn {
  --btn-h: 1.7rem;
  align-self: center;
  flex-shrink: 0;
  margin-left: 0.1rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}
.dock-tab-add.btn:hover:not(:disabled) { background: var(--surface-2); color: var(--text); }
.dock-tab-add svg { width: 1rem; height: 1rem; }
.dock-hamburger { align-self: center; flex-shrink: 0; color: var(--text-muted); }
.dock-hamburger { position: relative; }
.dock-hamburger.has-unread::after {
  content: "";
  position: absolute;
  top: 0.3rem;
  right: 0.3rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 2px var(--bg-elevated);
}

/* Columna muy estrecha (salas en modo compacto): solo iconos */
@container (max-width: 9rem) {
  .dock-tab-title, .dock-tab-pin, .dock-tab-badge { display: none; }
  .dock-tab-btn { justify-content: center; padding: 0 0.4rem; }
  .dock-tab-close { display: none; }
}
@container (max-width: 6.5rem) {
  .dock-tab-menu { display: none; }
}
@container (max-width: 11rem) {
  .dock-tab-add { display: none; }
}

/* Catalogar arrastrando (SPEC §8.2 y §11.3): cualquier pestaña de archivos como destino */
.dock-tab.is-file-drop-target .dock-tab-btn {
  box-shadow: inset 0 0 0 1.5px color-mix(in srgb, var(--accent) 55%, transparent);
}
.dock-tab.is-file-drop-over {
  background: var(--accent-soft);
  color: var(--accent-text);
}
.dock-tab.is-file-drop-over .dock-tab-btn { box-shadow: inset 0 0 0 2px var(--accent); }

/* --------------------------------------------------------------------------
   Paneles
   -------------------------------------------------------------------------- */
.dock-panel {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}
.dock-panel:focus { outline: none; }
.dock-panel-content { position: relative; flex: 1; min-height: 0; }
.dock-panel-rooms .dock-panel-content > .rooms-panel { position: absolute; inset: 0; }

/* Bandeja hundida (SPEC §9.1): las pestañas de archivos (§11), en escritorio. Dentro de la bandeja, --bg ES la
   bandeja (las vistas pintan su fondo con --bg) y la cabecera de sala también va sobre ella. La
   sombra interior se dibuja ENCIMA del contenido (::after sin eventos), como el borde de una
   bandeja que hace sombra sobre lo que tiene dentro. */
/* SPEC §19.10: como en los demás paneles, la cabecera (sala, vista y filtros) es blanca (--bg-elevated) y se une con
   la pestaña; la bandeja hundida empieza debajo, donde están las columnas y las tarjetas (.lib-board). */
.dock.is-desktop .dock-panel-library {
  --bg: var(--tray);
  --text-subtle: var(--text-muted); /* ≥ 4,5:1 también sobre la bandeja (base.css) */
  background: var(--bg-elevated);
}
.dock.is-desktop .dock-panel-library > .panel-head { --avatar-ring: var(--bg-elevated); background: var(--bg-elevated); }
.dock.is-desktop .dock-panel-library .lib-view { background: var(--bg-elevated); }
.dock.is-desktop .dock-panel-library .lib-board {
  border-top: 1px solid var(--border);
  border-radius: 0 0 var(--col-radius) var(--col-radius);
  padding-top: 0.75rem;
  background: var(--tray);
  box-shadow: var(--tray-shadow);
}
/* Columnas de tags de la biblioteca: en claro, más claras que la bandeja (en oscuro graphics.css ya
   las mezcla con --bg, que aquí es la bandeja, y quedan más claras). Las tarjetas (--surface) van
   encima. */
:root:not([data-theme="dark"]) .dock.is-desktop .dock-panel-library .lib-view {
  --lib-col-bg: color-mix(in srgb, var(--surface) 50%, var(--tray));
}

.panel-empty, .panel-error { height: 100%; overflow: auto; }

/* Cabecera de sala de cada panel */
.panel-head {
  --avatar-ring: var(--bg-elevated);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
  min-height: 3.25rem;
  padding: calc(0.45rem * var(--density) + 0.1rem) 0.55rem calc(0.45rem * var(--density) + 0.1rem) 0.85rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  container-type: inline-size;
}
.panel-head-glyph { display: flex; flex-shrink: 0; }
.panel-head-glyph .room-emoji { width: 2.25rem; height: 2.25rem; font-size: 1.15rem; border-radius: 0.7rem; }
.panel-head-glyph .thread-thumb { width: 2.25rem; height: 2.25rem; border-radius: 0.6rem; }
.panel-head-heading { flex: 1; min-width: 0; }
.panel-head-title {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  min-width: 0;
  font-size: 0.98rem;
  font-weight: 680;
  line-height: 1.3;
}
.panel-head-name { min-width: 0; }
.panel-head-muted { display: inline-flex; flex-shrink: 0; color: var(--text-subtle); }
/* SPEC §38: candado de sala privada */
.panel-head-private { display: inline-flex; flex-shrink: 0; color: var(--text-subtle); }
.panel-head-private[hidden] { display: none; }
.panel-pin {
  display: inline-grid;
  place-items: center;
  flex-shrink: 0;
  width: 1.4rem;
  height: 1.4rem;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent-text);
  transition: background-color var(--dur) var(--ease);
}
.panel-pin:hover { background: color-mix(in srgb, var(--accent) 24%, transparent); }
.panel-head-desc {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  min-width: 0;
  overflow: hidden;
  color: var(--text-muted);
  font-size: 0.78rem;
  line-height: 1.4;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.panel-head-desc > svg { flex-shrink: 0; width: 0.8rem; height: 0.8rem; }
/* El texto va en su propio span: el texto suelto de un flex no recibe la elipsis. */
.panel-head-desc > .panel-head-desc-text { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.panel-head-actions { display: flex; align-items: center; gap: 0.2rem; flex-shrink: 0; }
.panel-actions { display: flex; align-items: center; gap: 0.15rem; }
.panel-actions:empty { display: none; }
.panel-head-members { padding: 0.2rem 0.35rem; }

@container (max-width: 34rem) {
  .panel-head-members { display: none; }
}
@container (max-width: 17rem) {
  .panel-head-desc { display: none; }
  .panel-head { gap: 0.5rem; }
}

/* --------------------------------------------------------------------------
   Panel de salas dentro del dock y modo compacto
   -------------------------------------------------------------------------- */
.dock.is-desktop .rooms-panel .sidebar-header { padding-top: 0.65rem; }

.rooms-panel.is-compact .brand-name,
.rooms-panel.is-compact .sidebar-search,
.rooms-panel.is-compact .me-text,
.rooms-panel.is-compact .me-settings { display: none; }
.rooms-panel.is-compact .rooms-search-toggle { display: inline-flex; }
.rooms-panel.is-compact .sidebar-header {
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.6rem 0.25rem 0.45rem;
}
.rooms-panel.is-compact .sidebar-header-actions { flex-direction: column; gap: 0.15rem; }
.rooms-panel.is-compact .room-list { align-items: center; padding: 0.15rem 0.25rem 0.75rem; scrollbar-width: none; }
.rooms-panel.is-compact .room-list::-webkit-scrollbar { display: none; }
.rooms-panel.is-compact .room-item { justify-content: center; padding: 0.3rem; }
.rooms-panel.is-compact .room-item.active::before,
.rooms-panel.is-compact .room-item.is-shown::before { left: -0.25rem; }
.rooms-panel.is-compact .room-list-new { justify-content: center; padding: 0.3rem; }
.rooms-panel.is-compact .sidebar-footer { justify-content: center; padding: 0.45rem 0.25rem; }
.rooms-panel.is-compact .me-button { flex: 0 0 auto; padding: 0.25rem; }
.room-item-compact-badge {
  position: absolute;
  top: 0.05rem;
  right: 0.05rem;
  box-shadow: 0 0 0 2px var(--bg-elevated);
}
.room-item-compact-badge.badge { min-width: 1.1rem; height: 1.1rem; padding: 0 0.28rem; font-size: 0.625rem; }
.room-item-compact-badge.is-dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--accent);
}
.room-item-compact-badge.is-dot.badge-muted { background: var(--text-subtle); }
/* «Mis tareas» en compacto: el icono con el contador encima (SPEC §24.4) */
.rooms-panel.is-compact .room-mytasks { justify-content: center; width: auto; padding: 0.3rem; }
.rooms-panel.is-compact .room-mytasks.active::before,
.rooms-panel.is-compact .room-mytasks.is-shown::before { left: -0.25rem; }
.rooms-panel.is-compact .room-mytasks-name { display: none; }
.rooms-panel.is-compact .room-mytasks-badge {
  position: absolute;
  top: 0.05rem;
  right: 0.05rem;
  min-width: 1.1rem;
  height: 1.1rem;
  padding: 0 0.28rem;
  font-size: 0.625rem;
  box-shadow: 0 0 0 2px var(--bg-elevated);
}

/* Buscador flotante del modo compacto */
.rooms-quick-popover { width: min(18rem, calc(100vw - 1rem)); padding: 0.5rem; }
.rooms-quick { display: flex; flex-direction: column; gap: 0.4rem; }
.rooms-quick .input { min-height: 0; height: 2.25rem; font-size: 0.875rem; }
.rooms-quick-results { display: flex; flex-direction: column; gap: 1px; max-height: 18rem; overflow-y: auto; }
.rooms-quick-item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  width: 100%;
  padding: 0.35rem 0.45rem;
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--text);
  font-size: 0.875rem;
  text-align: left;
}
.rooms-quick-item .truncate { flex: 1; }
.rooms-quick-item:hover, .rooms-quick-item.is-current { background: var(--surface-2); }
.rooms-quick-empty { padding: 0.6rem 0.45rem; color: var(--text-subtle); font-size: 0.85rem; }

/* Aviso «Pestaña cerrada» con «Deshacer» (SPEC §9.5) */
.dock-toast-body { display: flex; align-items: center; gap: 0.85rem; }
.dock-toast-text { min-width: 0; }
.dock-toast-action {
  flex: none;
  padding: 0.25rem 0.6rem;
  border: 0;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--toast-text) 12%, transparent);
  color: color-mix(in srgb, var(--accent) 45%, var(--toast-text));
  font-size: 0.8125rem;
  font-weight: 700;
}
.dock-toast-action:hover { background: color-mix(in srgb, var(--toast-text) 20%, transparent); }
.dock-toast-action:focus-visible { outline: 2px solid var(--toast-text); outline-offset: 1px; }

/* --------------------------------------------------------------------------
   Arrastre de pestañas y salas
   -------------------------------------------------------------------------- */
html.is-dock-dragging,
html.is-dock-dragging * { cursor: grabbing !important; }
html.is-dock-dragging body { -webkit-user-select: none; user-select: none; }
html.is-dock-resizing,
html.is-dock-resizing * { cursor: col-resize !important; }
html.is-dock-resizing body { -webkit-user-select: none; user-select: none; }

.dock-drag-ghost {
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-toast);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  max-width: 18rem;
  padding: 0.4rem 0.75rem 0.4rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  pointer-events: none;
  will-change: transform;
}
.dock-drag-ghost > svg { width: 1rem; height: 1rem; color: var(--accent-text); }
.dock-drag-ghost-label { min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.dock-drag-ghost-note:empty { display: none; }
.dock-drag-ghost-note { color: var(--danger-text); font-size: 0.75rem; font-weight: 600; }
.dock-drag-ghost.is-invalid { border-color: color-mix(in srgb, var(--danger) 45%, var(--border)); }

.dock-drop-indicator {
  position: fixed;
  z-index: calc(var(--z-dropdown) - 1);
  border: 2px solid color-mix(in srgb, var(--accent) 70%, transparent);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  pointer-events: none;
  transition: left 90ms var(--ease), top 90ms var(--ease), width 90ms var(--ease), height 90ms var(--ease);
}
.dock-drop-indicator[data-kind="tabs"] { border-radius: var(--radius-sm); }
.dock-drop-indicator.is-invalid {
  border-color: color-mix(in srgb, var(--danger) 60%, transparent);
  background: color-mix(in srgb, var(--danger) 10%, transparent);
}
.dock-drop-caret {
  position: fixed;
  z-index: var(--z-dropdown);
  width: 3px;
  border-radius: 3px;
  background: var(--accent);
  pointer-events: none;
}
/* SPEC §25.1: columna nueva = una raya en el hueco entre columnas, con su etiqueta */
.dock-drop-label { display: none; }
.dock-drop-indicator.is-line { border: 0; border-radius: 3px; background: var(--accent); }
.dock-drop-indicator.is-line.is-invalid { background: var(--danger); }
.dock-drop-indicator.is-line:not(.is-invalid) .dock-drop-label {
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--accent);
  color: var(--accent-contrast);
  font-size: 0.75rem;
  font-weight: 650;
  white-space: nowrap;
  transform: translate(-50%, -50%);
  box-shadow: var(--shadow-sm);
}
/* Como pestaña: el panel, solo teñido; la pestaña fantasma dice dónde queda */
.dock-drop-indicator[data-kind="center"]:not(.is-invalid) {
  border: 1px dashed color-mix(in srgb, var(--accent) 45%, transparent);
  background: color-mix(in srgb, var(--accent) 7%, transparent);
}
.dock-drop-tab {
  position: fixed;
  z-index: var(--z-dropdown);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-width: 0;
  padding: 0 0.7rem;
  border: 1.5px dashed color-mix(in srgb, var(--accent) 70%, transparent);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--accent) 10%, var(--bg-elevated));
  color: var(--accent-text);
  font-size: 0.8125rem;
  font-weight: 600;
  white-space: nowrap;
  pointer-events: none;
}
.dock-drop-tab-label { min-width: 0; overflow: hidden; text-overflow: ellipsis; }

/* --------------------------------------------------------------------------
   Móvil (< 900 px): una columna + cajón de salas
   -------------------------------------------------------------------------- */
.dock-drawer, .dock .drawer-backdrop { display: none; }

.dock.is-mobile .dock-workspace { overflow: hidden; }
.dock.is-mobile .dock-column { flex: 1 1 auto; min-width: 0; }
.dock.is-mobile .dock-tabbar { height: 2.9rem; padding: 0 0.3rem; gap: 0.1rem; }
.dock.is-mobile .dock-tab { flex: 1 0 auto; max-width: none; justify-content: center; margin-top: 0.35rem; }
/* Pestañas extra (un hilo o una sala fijada): no deben aplastar a «Chat» y las pestañas de archivos */
.dock.is-mobile .dock-tab.is-pinned { flex: 0 1 auto; min-width: 4.5rem; max-width: 9.5rem; }
.dock.is-mobile .dock-tab-btn { justify-content: center; padding: 0 0.5rem; font-size: 0.9rem; }
/* Pestañas de archivos con nombres largos: se recortan con «…» (la barra se desplaza si no caben) */
.dock.is-mobile .dock-tab-library { max-width: 11rem; }
.dock.is-mobile .drawer-close { display: inline-flex; }

.dock.is-mobile .dock-drawer {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 900;
  display: flex;
  width: min(20rem, 86vw);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-lg);
  transform: translateX(-102%);
  visibility: hidden;
  transition: transform 220ms var(--ease), visibility 0s linear 220ms;
}
.dock.is-mobile.drawer-open .dock-drawer {
  transform: none;
  visibility: visible;
  transition: transform 220ms var(--ease), visibility 0s;
}
.dock.is-mobile .dock-drawer > .dock-panel { position: absolute; inset: 0; }
.dock.is-mobile .drawer-backdrop {
  display: block;
  position: fixed;
  inset: 0;
  z-index: 899;
  background: var(--overlay);
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms var(--ease);
}
.dock.is-mobile.drawer-open .drawer-backdrop { opacity: 1; pointer-events: auto; }

@media (max-width: 420px) {
  .dock.is-mobile .dock-tab-icon { display: none; }
  .dock.is-mobile .dock-tab-btn { padding: 0 0.35rem; }
}

/* SPEC §17.3: la barra de pestañas del panel con el foco lleva un toque del acento */
.dock-column.is-focused > .dock-tabbar {
  background: color-mix(in srgb, var(--accent) 7%, var(--bg-elevated));
  border-bottom-color: color-mix(in srgb, var(--accent) 25%, var(--border));
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

/* §54 «aquí está»: al pedir algo cuyo panel ya estaba abierto, su pestaña y el contorno de su columna se iluminan
   con dos pulsos suaves (dock.js flashPanel quita .is-found a los 1,2 s). Quietos si se reduce el movimiento. */
.dock-tab.is-found { animation: dock-found-tab 1s ease-out; }
@keyframes dock-found-tab {
  18%, 62% { background-color: var(--accent-soft); box-shadow: inset 0 0 0 2px var(--accent); color: var(--accent-text); }
  40% { background-color: color-mix(in srgb, var(--accent-soft) 45%, transparent); box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--accent) 35%, transparent); }
}
.dock.is-desktop .dock-column.is-found::after {
  content: '';
  position: absolute;
  inset: -1px;
  z-index: 5;
  border-radius: var(--radius-lg);
  box-shadow: 0 0 0 3px var(--accent), 0 0 0 9px color-mix(in srgb, var(--accent) 22%, transparent);
  pointer-events: none;
  opacity: 0;
  animation: dock-found-ring 1s ease-out;
}
@keyframes dock-found-ring {
  18%, 62% { opacity: 1; }
  40% { opacity: 0.35; }
  100% { opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  /* Quieta y con el tinte de los pulsos. Más específica que la pestaña visible del escritorio
     (.dock.is-desktop .dock-tab.is-selected) y que :hover, que si no le quitan el fondo y el color (la animación les
     gana sin más; una regla normal, no). */
  .dock .dock-tab.is-found,
  .dock.is-desktop .dock-tab.is-found.is-selected,
  .dock.is-desktop .dock-tab.is-found:hover {
    animation: none;
    background-color: var(--accent-soft);
    box-shadow: inset 0 0 0 2px var(--accent);
    color: var(--accent-text);
  }
  .dock.is-desktop .dock-column.is-found::after { animation: none; opacity: 1; }
}