/* ============================================================
   Métodos de Raíces — componentes propios
   (reutiliza css/style.css para la base visual)
   ============================================================ */

.logo-raiz {
  font-family: var(--sans);
  font-style: normal;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Botón "Ayuda" de la barra superior */
.btn-ayuda-top {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 12px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: #b8c4dc;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.btn-ayuda-top:hover { background: rgba(255, 255, 255, 0.1); color: #ffffff; }
.btn-ayuda-top svg { width: 16px; height: 16px; }

/* ============ Alertas ============ */
.alerta {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  padding: 13px 15px;
  border-radius: 10px;
  border: 1px solid;
  font-size: 13px;
  line-height: 1.5;
}

.alerta[hidden] { display: none; }

.alerta-icono {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  font-size: 12px;
  font-weight: 700;
}

.alerta-titulo { display: block; font-weight: 700; }
.alerta-texto { display: block; opacity: 0.85; }

.alerta-ok {
  background: #ecfdf5;
  border-color: #a7f3d0;
  color: #065f46;
  margin-top: 14px;
}
.alerta-ok .alerta-icono { background: #10b981; color: #ffffff; }

.alerta-error {
  background: #fef2f2;
  border-color: #fecaca;
  color: #991b1b;
}
.alerta-error .alerta-icono { background: #ef4444; color: #ffffff; }

.alerta-warn {
  background: #fffbeb;
  border-color: #fde68a;
  color: #92400e;
}
.alerta-warn .alerta-icono { background: #f59e0b; color: #ffffff; }

.alerta-info {
  background: #eff6ff;
  border-color: #bfdbfe;
  color: #1e40af;
}
.alerta-info .alerta-icono { background: #3b82f6; color: #ffffff; }

body[data-tema="oscuro"] .alerta-ok { background: rgba(16,185,129,0.12); border-color: rgba(16,185,129,0.35); color: #6ee7b7; }
body[data-tema="oscuro"] .alerta-error { background: rgba(239,68,68,0.12); border-color: rgba(239,68,68,0.35); color: #fca5a5; }
body[data-tema="oscuro"] .alerta-warn { background: rgba(245,158,11,0.12); border-color: rgba(245,158,11,0.35); color: #fcd34d; }
body[data-tema="oscuro"] .alerta-info { background: rgba(59,130,246,0.12); border-color: rgba(59,130,246,0.35); color: #93c5fd; }

/* ============ Tarjeta de raíz ============ */
.raiz-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
}

.raiz-izq .card-titulo { margin-bottom: 4px; }

.raiz-num {
  font-size: clamp(2.1rem, 3.4vw, 2.9rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.raiz-despues {
  margin: 2px 0 0;
  font-size: 12.5px;
  color: var(--muted);
}

.valor-fx {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 12px 16px;
  border-radius: 10px;
  background: #eef2ff;
  border: 1px solid #e0e7ff;
  min-width: 190px;
}

body[data-tema="oscuro"] .valor-fx { background: rgba(99,102,241,0.12); border-color: rgba(99,102,241,0.30); }

.valor-fx-titulo {
  font-size: 11.5px;
  font-weight: 600;
  color: #6366f1;
}

body[data-tema="oscuro"] .valor-fx-titulo { color: #a5b4fc; }

.valor-fx-txt {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--texto);
  white-space: nowrap;
}

/* ============ Leyenda: estilos adicionales ============ */
.sw.tang {
  width: 18px;
  height: 0;
  border-top: 2px dashed #ef4444;
}

.sw.punto-x0 { width: 10px; height: 10px; border-radius: 50%; background: #f59e0b; }
.sw.punto-xn { width: 10px; height: 10px; border-radius: 50%; background: #2563eb; }
.sw.estrella { color: #22c55e; font-size: 15px; line-height: 1; width: auto; height: auto; }

/* ============ Tarjetas de iteración ============ */
.iter-row {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 6px;
}

.iter-card {
  flex: none;
  width: 150px;
  padding: 10px 11px 8px;
  border: 1.5px solid var(--borde);
  border-radius: 10px;
  background: var(--card);
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.iter-card:hover { border-color: var(--primario); }

.iter-card.activa {
  border-color: var(--primario);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.iter-titulo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--texto);
  margin-bottom: 5px;
}

.punto {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #2563eb;
  flex: none;
}

.iter-card:first-child .punto { background: #f59e0b; }

.iter-dato {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.iter-canvas {
  display: block;
  width: 100%;
  height: 82px;
  margin-top: 7px;
  border-radius: 7px;
}

/* ============ Detalle del cálculo ============ */
.detalle-sub {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--muted);
}

.detalle-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 18px;
  align-items: start;
}

.detalle-grid .tabla { margin-bottom: 0; }

.formula-panel {
  padding: 14px 16px;
  border-radius: 10px;
  background: var(--sutil);
}

.formula-titulo {
  display: block;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 10px;
}

.formula-panel .formula-box {
  background: transparent;
  padding: 0;
  font-size: 16px;
}

.formula-panel .frac { font-size: 0.7em; }

/* ============ Opciones avanzadas ============ */
.opciones-avanzadas {
  margin-top: 18px;
  border-top: 1px dashed var(--borde);
}

.opciones-head {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 12px 2px 4px;
  border: none;
  background: transparent;
  color: var(--texto);
  font-size: 13px;
  font-weight: 600;
  text-align: left;
}

.opciones-head .chev { width: 14px; height: 14px; transition: transform 0.25s; }

.opciones-avanzadas.cerrado .opciones-head .chev { transform: rotate(-90deg); }

.opciones-body {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows 0.3s ease;
}

.opciones-avanzadas.cerrado .opciones-body { grid-template-rows: 0fr; }

.opciones-inner { overflow: hidden; padding-top: 8px; }

/* Stepper compacto dentro de una media columna */
.fila-2 .stepper button { width: 36px; font-size: 16px; }
.fila-2 .stepper input { padding: 9px 4px; font-size: 13px; }

/* ============ Controles de vista del gráfico ============ */
.vista-controles {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-size: 12px;
  color: var(--muted);
}

.vc-label { font-weight: 600; }

.vc-campo {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.vc-campo input {
  width: 92px;
  padding: 5px 8px;
  font-family: var(--mono);
  font-size: 12px;
}

.vc-btn {
  font-family: inherit;
  font-size: 11.5px;
  font-weight: 600;
  padding: 5px 12px;
  border: 1px solid var(--borde);
  border-radius: 6px;
  background: var(--card);
  color: var(--texto);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.vc-btn:hover { border-color: var(--primario); color: var(--primario); }

/* ============ Responsive ============ */
@media (max-width: 1180px) {
  .detalle-grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .raiz-card { flex-direction: column; align-items: flex-start; }
  .valor-fx { width: 100%; }
}