.box {
    box-sizing: border-box;
    margin-top: 1rem;
    overflow-x: auto;

    .inner {
        box-sizing: border-box;
        padding: 10px;
    }
}

.box-container {
    display: inline-block;
}

section.box {
    border: 1px solid var(--box-border);
    background: #fff;
}

section {
    header {
        > h1 {
            margin: 10px 10px 0 10px;
            padding-bottom: 5px;
            font-size: 1.1em;
            border-bottom: 1px solid #e1e1e1;
        }
    }

    > h2 {
       box-sizing: border-box;
        font-size: 1.2em;
        margin-bottom: 5px;
    }
}