/* Configuración estructural base */
body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    padding: 20px;
    margin: 0;
}

h1 {
    color: #2c3e50;
    border-bottom: 2px solid #2c3e50;
    padding-bottom: 10px;
}

/* --- ESTILO AZUL PARA LA EXPLICACIÓN --- */
.explicacion {
    background-color: #ebf8ff;
    padding: 10px 15px;
    border-left: 4px solid #3182ce;
    margin-bottom: 20px;
    border-radius: 0 4px 4px 0;
    color: #2b6cb0;
}

.ejercicio {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* Área de renderizado */
.area-render {
    height: 250px;
    width: 100%;
    background-color: #ebf8ff;
    border: 2px dashed #3182ce;
    border-radius: 6px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    margin-bottom: 20px;
}

#letras {
    font-weight: bold;
    color: #2c3e50;
}

/* Panel de controles */
.controles {
    display: flex;
    gap: 15px;
    align-items: center;
    background: #f7fafc;
    padding: 15px;
    border-radius: 6px;
    border: 1px solid #cbd5e0;
}

.btn-interactivo {
    padding: 8px 15px;
    background-color: #3182ce;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

.btn-interactivo:hover {
    background-color: #2b6cb0;
}