html, body {
    margin: 0;
    padding: 0;
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

#wrap {
    flex: 1; 
}
header {
    padding: 1.5rem;
    border-bottom: 1px solid #e4e4e4;
}

header img {
    width: 30%;
}
main {
    padding: 2rem 1.5rem;
}
.content1 h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.content1  pre {
    font-size: 1.6rem;
    line-height: 1.3;
}
footer {
    border: 1px solid #e4e4e4;
    background-color: #fff;
    padding: 20px;
    text-align: center;
}
footer p{
    line-height: 1.1;
    font-size: 1.4rem;
}