<body style="-webkit-writing-mode: horizontal-bt">
<div style="width: 600px; text-align: center;margin-top:50px">
    <span style="
        padding: 0 15px;
        font-size: 48px;
        background-color: lightyellow;
        -webkit-border-radius: 10px;
        border: 5px solid green;
        line-height: 1.5;
        -webkit-box-shadow: 15px 30px 5px rgba(0, 0, 0, 0.2) inset;
    ">
        This sentence is too long to fit on a single line.
    </span>
</div>

<div style="width: 600px; text-align: center;">
    <span style="
        padding: 0 15px;
        font-size: 48px;
        background-color: lightyellow;
        -webkit-border-radius: 10px;
        border: 5px solid green;
        line-height: 1.5;
        -webkit-box-shadow: 15px 30px 5px rgba(0, 0, 0, 0.2);
    ">
        This sentence is too long to fit on a single line.
    </span>
</div>