/* Variables de Biblioteca Tributaria */
:root {
  --bt-primario: #1162af; /* Color institucional real de Cepet/BT */
  --bt-primario-oscuro: #093f75;
  --bt-primario-suave: #e6f0fa;
  --bt-acento: #e3000f;

  /* Textos */
  --bt-texto: #1f2937;
  --bt-texto-suave: #6b7280;
  --bt-texto-claro: #9ca3af;

  /* Superficies */
  --bt-borde: #e5e7eb;
  --bt-fondo: #f7f8fc;
  --bt-blanco: #ffffff;
}



.chat-historial {
  width: 260px;
  min-width: 260px;
  background: white;
  border-right: 1px solid var(--bt-borde);
  height: 100%;
  overflow-y: auto;
  padding: 1rem;
}

.item-historial {
  font-size: 0.85rem;
  padding: 0.5rem 0.65rem;
  border-radius: 8px;
  cursor: pointer;
  margin-bottom: 2px;
  display: flex;
  align-items: center;
  color: var(--bt-texto);
  font-weight: 500;
  transition: background 0.15s;
  font-weight: 500;
  transition: background 0.15s;
}

.item-historial:hover {
  background: var(--bt-fondo);
}

.item-historial.activo {
  background: var(--bt-primario-suave);
  color: var(--bt-primario-oscuro);
  font-weight: 700;
}

.burbuja-ia {
  background: white;
  border: 1px solid rgba(17, 24, 39, 0.06);
  border-radius: 18px 18px 18px 4px;
  padding: 1rem 1.2rem;
  max-width: 82%;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--bt-texto);
  box-shadow: 0 2px 8px rgba(33, 45, 88, 0.05);
}

.burbuja-usuario {
  background: linear-gradient(
    135deg,
    var(--bt-primario-oscuro),
    var(--bt-primario)
  );
  border-radius: 18px 18px 4px 18px;
  padding: 0.85rem 1.1rem;
  max-width: 75%;
  font-size: 0.9rem;
  line-height: 1.6;
  color: white;
}

.cita-doc {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.65rem 0.85rem;
  background: var(--bt-fondo);
  border-left: 3px solid var(--bt-primario);
  border-radius: 0 8px 8px 0;
  margin-top: 0.75rem;
  font-size: 0.82rem;
  text-decoration: none;
  cursor: pointer;
}
.cita-doc:hover {
  background: var(--bt-primario-suave);
}

.typing-indicator span {
  display: inline-block;
  width: 7px;
  height: 7px;
  background: var(--bt-primario);
  border-radius: 50%;
  margin: 0 2px;
  animation: bounce 1.4s infinite;
}
.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}
.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}
@keyframes bounce {
  0%,
  80%,
  100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  40% {
    transform: translateY(-6px);
    opacity: 1;
  }
}

.btn-bt-primario {
  background: linear-gradient(
    135deg,
    var(--bt-primario),
    var(--bt-primario-oscuro)
  );
  border: none;
  color: white;
  font-weight: 700;
  border-radius: 8px;
  transition:
    opacity 0.15s,
    transform 0.15s;
}

.btn-bt-primario:hover {
  opacity: 0.92;
  color: white;
  transform: translateY(-1px);
}

.panel-referencias {
  width: 260px;
  min-width: 260px;
  background: white;
  border-left: 1px solid var(--bt-borde);
  padding: 1rem;
}

.titulo-filtro {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--bt-texto-suave);
}

.etiqueta-tipo {
  display: inline-block;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
}
.etiqueta-tipo.oficio {
  background: #eaf8f1;
  color: #065f46;
}
.etiqueta-tipo.jurisprudencia {
  background: #eef1ff;
  color: #2a2c69;
}
.etiqueta-tipo.circular {
  background: #fff5e8;
  color: #92400e;
}
.etiqueta-tipo.ley {
  background: #fef2f2;
  color: #991b1b;
}

.btn-sugerencia {
  border-radius: 20px;
  border: 1px solid var(--bt-borde);
  font-size: 0.78rem;
  font-weight: 600;
  color: #4b5563;
  background: white;
  padding: 0.35rem 0.75rem;
}
.btn-sugerencia:hover {
  background: var(--bt-primario-suave);
  color: var(--bt-primario-oscuro);
  border-color: rgba(17, 98, 175, 0.4);
}

/* ── Botones de acción dual en tarjetas de resultado ── */
.btn-accion-previa {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--bt-primario-suave); color: var(--bt-primario-oscuro);
  border: 1px solid rgba(91,105,195,0.2); border-radius: 8px;
  padding: 0.28rem 0.75rem; font-size: 0.82rem; font-weight: 700;
  cursor: pointer; transition: all 0.15s; font-family: inherit;
  text-decoration: none;
}
.btn-accion-previa:hover { background: var(--bt-primario); color: white; border-color: var(--bt-primario); }

.btn-accion-ficha {
  display: inline-flex; align-items: center; justify-content: center;
  background: white; color: var(--bt-texto);
  border: 1px solid var(--bt-borde); border-radius: 8px;
  padding: 0.28rem 0.75rem; font-size: 0.82rem; font-weight: 700;
  text-decoration: none; transition: all 0.15s; font-family: inherit;
}
.btn-accion-ficha:hover { border-color: var(--bt-primario); color: var(--bt-primario); }

/* ── Modal Vista previa PDF ── */
#modal-previa { display:none; position:fixed; inset:0; z-index:1060;
  background:rgba(17,24,39,0.65); backdrop-filter:blur(4px);
  align-items:center; justify-content:center; padding:1rem; }
#modal-previa.visible { display:flex; }
#modal-previa-inner {
  background:white; border-radius:18px; width:100%; max-width:920px;
  height:88vh; display:flex; flex-direction:column;
  box-shadow:0 24px 64px rgba(0,0,0,0.28); overflow:hidden;
}
#modal-previa-header {
  display:flex; align-items:center; justify-content:space-between;
  padding:0.9rem 1.25rem; border-bottom:1px solid var(--bt-borde); flex-shrink:0;
}
#modal-previa-titulo {
  font-weight:800; font-size:0.92rem; color:var(--bt-primario-oscuro);
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis; max-width:580px;
}
#modal-previa-iframe { flex:1; border:none; display:block; width:100%; min-height:600px; }
#modal-previa-footer {
  padding:0.75rem 1.25rem; border-top:1px solid var(--bt-borde);
  display:flex; align-items:center; justify-content:space-between; flex-shrink:0;
}