.qrs-wrapper {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
    font-family: inherit;
    padding-top: 20px;
}

.qrs-btn {
    background: #0073aa;
    color: #fff;
    border: none;
    padding: 12px 28px;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    margin: 8px;
}
.qrs-btn:hover { background: #005f8a; }
.qrs-btn-stop  { background: #cc0000; }
.qrs-btn-stop:hover { background: #a00000; }

#qrs-container {
    margin-top: 16px;
    border-radius: 8px;
    overflow: hidden;
}

#qrs-video {
    width: 100%;
    max-width: 500px;
    border-radius: 8px;
}

#qrs-result {
    margin-top: 12px;
    font-size: 16px;
    word-break: break-all;
    padding: 8px;
}