.btn-send {
        position: fixed;
        z-index: 9;
        right: 20px;
        bottom: 50px;
        display: block;
        width: 50px;
        height: 50px;
        border-radius: 50%;
        background: #ff9800;
        border: 3px solid #fff;
        box-shadow: 1px 1px 1px #f3f3f3;
        text-align: center;
        color: #fff;
        font-weight: bold;
        padding: 11px;
    }