/* ===========================================================
   Ribbon — Office 2010 Blue (clon fiel)
   Tabs con gradiente plateado + activo blanco con highlight azul
   =========================================================== */

/* ---------- Fila de tabs del ribbon ---------- */
.ribbon-tabs {
  display: flex;
  align-items: flex-end;
  background: var(--bg-ribbon-tabs);
  border-bottom: 1px solid var(--border-ribbon);
  padding: 0;
  gap: 0;
  position: relative;
  box-shadow: 0 1px 0 rgba(255,255,255,0.3) inset;
}

/* Botón File (Archivo) azul a la izquierda */
.ribbon-file {
  background: linear-gradient(180deg, var(--ofc-blue-500) 0%, var(--ofc-blue-700) 50%, var(--ofc-blue-900) 100%);
  color: #fff;
  font-weight: var(--fw-semi);
  font-size: var(--fs-sm);
  padding: 0 var(--sp-4);
  height: var(--h-ribbon-tabs);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  border-right: 1px solid #073360;
  text-shadow: 0 1px 0 rgba(0,0,0,0.35);
  transition: filter var(--t-fast);
  box-shadow: 0 1px 0 rgba(255,255,255,0.3) inset;
}
.ribbon-file:hover { filter: brightness(1.1); }
.ribbon-file:active { filter: brightness(0.92); }
.ribbon-file svg { width: 14px; height: 14px; filter: drop-shadow(0 1px 0 rgba(0,0,0,0.35)); }

.ribbon-tabs__list {
  display: flex;
  align-items: flex-end;
  gap: 0;
  margin-left: var(--sp-3);
}

.ribbon-tab {
  height: calc(var(--h-ribbon-tabs) - 1px);
  padding: 0 var(--sp-4);
  display: flex; align-items: center;
  font-size: var(--fs-sm);
  font-weight: var(--fw-regular);
  letter-spacing: 0.2px;
  text-transform: uppercase;
  color: var(--text);
  border-top: 1px solid transparent;
  border-left: 1px solid transparent;
  border-right: 1px solid transparent;
  border-top-left-radius: 3px;
  border-top-right-radius: 3px;
  position: relative;
  text-shadow: 0 1px 0 rgba(255,255,255,0.5);
  transition: background var(--t-fast), box-shadow var(--t-fast);
}
.ribbon-tab:hover {
  background: linear-gradient(180deg, #dae6f3 0%, #b7cce3 100%);
  border-color: var(--ofc-blue-300);
  box-shadow: 0 1px 0 rgba(255,255,255,0.5) inset;
}
.ribbon-tab[aria-selected="true"] {
  background: #fdfdfe;
  color: var(--ofc-blue-900);
  height: var(--h-ribbon-tabs);
  border: 1px solid var(--border-ribbon);
  border-bottom-color: #fdfdfe;
  margin-bottom: -1px;
  z-index: 1;
  font-weight: var(--fw-semi);
  text-shadow: none;
  box-shadow:
    0 -1px 0 var(--ofc-blue-500) inset,
    0 -2px 0 rgba(74, 144, 217, 0.35) inset;
}
.ribbon-tab__key {
  text-decoration: underline;
  text-decoration-color: transparent;
}
body.alt-mode .ribbon-tab__key { text-decoration-color: currentColor; }

/* Controles a la derecha del ribbon */
.ribbon-tabs__controls {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1px;
  padding-right: var(--sp-2);
}
.ribbon-tabs__controls .qat__btn { height: 22px; }

/* ---------- Cuerpo del ribbon (tab activo expandido) ---------- */
.ribbon-body {
  background: var(--bg-ribbon);
  border-bottom: 1px solid var(--border-strong);
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 2px 0 0;
  background-image:
    linear-gradient(180deg, #ffffff 0%, #f5f8fb 100%);
}
.ribbon-body::-webkit-scrollbar { height: 6px; }

.ribbon-panel { display: none; }
.ribbon-panel[data-active="true"] {
  display: flex;
  align-items: stretch;
  min-width: 100%;
}

/* Grupo dentro del ribbon */
.rb-group {
  display: flex;
  flex-direction: column;
  padding: 1px 4px 0;
  border-right: 1px solid var(--sil-400);
  min-width: 0;
  position: relative;
}
.rb-group::after {
  content: "";
  position: absolute;
  top: 0; bottom: 22px; right: 0;
  width: 1px;
  background: rgba(255,255,255,0.7);
}
.rb-group:last-child { border-right: none; }
.rb-group:last-child::after { display: none; }

.rb-group__content {
  flex: 1;
  display: flex;
  align-items: flex-start;
  gap: 2px;
  padding: 2px 2px 0;
}
.rb-group__label {
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  padding: 2px 6px 3px;
  margin-top: auto;
  white-space: nowrap;
  border-top: 1px solid var(--sil-300);
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.02) 100%);
}

/* Botón grande del ribbon (icono destacado arriba, texto abajo) */
.rb-btn-lg {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 2px;
  padding: 3px 4px 2px;
  width: 64px;
  border-radius: 3px;
  border: 1px solid transparent;
  transition: background var(--t-fast), border-color var(--t-fast);
  color: var(--text);
  text-align: center;
  background: transparent;
}
.rb-btn-lg:hover {
  background: var(--bg-hover);
  border-color: var(--border-hover);
  box-shadow: 0 1px 0 rgba(255,255,255,0.5) inset;
}
.rb-btn-lg:active {
  background: var(--bg-active);
  border-color: #c07c00;
}
.rb-btn-lg__icon {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  color: var(--ofc-blue-700);
  filter: drop-shadow(0 1px 0 rgba(255,255,255,0.6));
}
.rb-btn-lg__icon svg { width: 30px; height: 30px; }
.rb-btn-lg__label {
  font-size: var(--fs-xs);
  line-height: 1.15;
  font-weight: var(--fw-regular);
  max-width: 64px;
  word-wrap: break-word;
  color: var(--text);
}

/* Columna de botones chicos (icono a la izquierda, texto a la derecha) */
.rb-btn-col {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 1px 0;
  min-width: 0;
}
.rb-btn-sm {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 2px var(--sp-2);
  border-radius: 2px;
  border: 1px solid transparent;
  font-size: var(--fs-sm);
  color: var(--text);
  white-space: nowrap;
  transition: background var(--t-fast), border-color var(--t-fast);
  min-height: 20px;
  background: transparent;
}
.rb-btn-sm:hover {
  background: var(--bg-hover);
  border-color: var(--border-hover);
}
.rb-btn-sm:active {
  background: var(--bg-active);
  border-color: #c07c00;
}
.rb-btn-sm__icon {
  width: 16px; height: 16px;
  display: grid; place-items: center;
  color: var(--ofc-blue-700);
  flex-shrink: 0;
  filter: drop-shadow(0 1px 0 rgba(255,255,255,0.6));
}
.rb-btn-sm__icon svg { width: 16px; height: 16px; }

/* Botón con dropdown arrow */
.rb-btn-sm--split,
.rb-btn-lg--split {
  position: relative;
}
.rb-btn-sm--split::after,
.rb-btn-lg--split::after {
  content: "▾";
  font-size: 9px;
  color: var(--text-muted);
  margin-left: var(--sp-1);
}

/* Placeholder para tabs aún no implementados */
.rb-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-style: italic;
  padding: 0 var(--sp-6);
  font-size: var(--fs-sm);
  width: 100%;
}