button {
    background-color: #475569;
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: background-color 0.2s, transform 0.1s;
    margin: 5px 5px 5px 0;
}

button:hover {
    background-color: #334155;
}

button:active {
    transform: scale(0.98);
}




#contenedorAyuda {
    background-color: #f1f5f9;
    border-radius: 8px;
    padding: 20px;
    margin-top: 20px;
    border: 1px solid #e2e8f0;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
    background: white;
    border-radius: 8px;
    overflow: hidden;
}

td {
    padding: 12px 8px;
    text-align: center;
    border-bottom: 1px solid #e2e8f0;
    vertical-align: middle;
}


.fila-seleccion td,
.fila-calculo td {
    vertical-align: middle; 
    padding: 6px 4px;
    text-align: center;
    white-space: nowrap;   
}

.celda-operador {
    vertical-align: middle !important;
}


.controles-reordenar {
    display: flex;
    justify-content: center;
    gap: 3px;
    margin-bottom: 4px;
}

.btn-mover {
    background-color: #e9ecef;
    color: #495057;
    border: 1px solid #ced4da;
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-mover:hover {
    background-color: #0d6efd;
    color: white;
    border-color: #0a58ca;
}


.radio-operador {
    display: none;
}

.label-operador {
    display: inline-block;
    padding: 8px 14px;
    background-color: #e2e8f0;
    border: 2px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    color: #475569;
    transition: all 0.2s;
}

.label-operador:hover {
    background-color: #cbd5e1;
}

.radio-operador:checked + .label-operador {
    background-color: #eff6ff;
    border-color: #3b82f6;
    color: #1d4ed8;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}


.contenido-termino {
    display: inline-flex;
    flex-direction: row;   
    align-items: center;
    justify-content: center;
    gap: 2px;
    white-space: nowrap;
}




#feedbackAyuda {
    margin-top: 15px;
    font-weight: 500;
    padding: 12px;
    border-radius: 6px;
    text-align: center;
}

.exito {
    color: #166534;
    background-color: #dcfce7;
    border: 1px solid #bbf7d0;
}

.error {
    color: #991b1b;
    background-color: #fee2e2;
    border: 1px solid #fecaca;
}

.oculto {
    display: none !important;
}

.fraccion-visual {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    vertical-align: middle;
    margin: 0 2px;
}

.fraccion-num {
    border-bottom: 1px solid #000;
    padding: 0 2px;
}

.fraccion-den {
    padding: 0 2px;
}

.monomio-input-group, 
.termino-copia-group {
    display: flex;
    gap: 4px;
    justify-content: center;
    align-items: center;
}

.coef-input {
    width: 50px;
    text-align: center;
}

.lit-input {
    width: 70px;
    text-align: center;
}

.select-operador, 
.select-parentesis {
    width: 45px;
    text-align: center;
    cursor: pointer;
}