body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    padding: 20px;
}

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

.explicacion {
    background-color: #ebf8ff;
    padding: 10px;
    border-left: 4px solid #3182ce;
    color: #2b6cb0;
    margin-bottom: 20px;
}

.bloque-control {
    display: flex;
    gap: 10px;
    align-items: center;
}

input[type="text"] {
    padding: 8px;
    border: 1px solid #cbd5e0;
    border-radius: 4px;
    flex: 1;
}

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

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