code {
    font-weight: bold;
}

li {
    margin: 0.5em;
}

#problemas p:last-child {
    margin: 2em 0;
}

h1, h2 {
    font-size: 1em;
}

#padre {
    position: relative;
    height: 500px;
    width: 500px;
    border: 2px solid black;
    margin: 5em auto;
    display: flex;
    justify-content: center;
}

#hijo {
    height: 100%;
    width: 50%;
    background: red;
}

table {
    position: relative;
    left:50%;
    transform: translateX(-50%);
    width: 50%;
    height: 10em;
    border-collapse: collapse;
    margin-bottom: 4em;
}

th {
    background: gray;
}

td {
    background: lightgray;
}

table, td, th {
    border: 2px solid black;
}

#txt-img {
    font-size: 2em;
}

img {
    float: left;
    width: 40%;
    width: 500px;
    margin: 0 2em;
}