.embed-box {
    position: relative;
    padding: 12px;
    border: 2px dashed #999;
    border-radius: 10px;
    background: #fdfdfd;
}

.embed-box:before {
    content: "Embedded Content";
    position: absolute;
    top: -12px;
    left: 50px;
    background: #fff;
    padding: 2px 8px;
    font-size: 12px;
    color: #666;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.embed-box iframe {
    width: 100%;
    border: none;
}