body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f4f9;
    padding: 20px;
    margin: 0;
    line-height: 1.6;

    margin: 0 auto;
}

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

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

.explicacion {
    background-color: #ebf8ff;
    padding: 15px;
    border-left: 4px solid #3182ce;
    margin-bottom: 20px;
    border-radius: 0 4px 4px 0;
    color: #2b6cb0;
}

.area-render {
    padding: 20px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background-color: #fcfcfc;
    margin-top: 20px;
}

.btn-interactivo {
    padding: 10px 20px;
    background-color: #3182ce;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 4px;
    font-weight: bold;
    transition: background-color 0.3s;
}

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