html {
    padding: 0;
    margin: 0;
}

body {
    margin: 0;
    padding: 0;
    background: url('images/dots.png') #333;

}
#container {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

#graphicElem {
    width: 735px;
    height: 755px;
    background: url('images/phone.png') center center no-repeat;
    position: relative;
}
iframe {
    width: 320px;
    height: 544px;
    margin: 112px auto auto 207px;
    padding: 0;
    position: relative;
}


#qrCode {
    position: absolute;
    width: 200px;
    height: auto;
    top: 5%;
    right: 5%;
}

#qrCode img {
    width: 100%;
    max-width: 100%;
}
#reloadBtn {
    width:22px;
    height:22px;
    position: absolute;
    top: 77px;
    left: 494px;
}

img {
    width: 100%;
    max-width: 100%;
}

#qrCode h3 {
    color: gray;
}

#logo {
    position: absolute;
    width: 300px;
    top: 2%;
    left: 2%;
}

#logo2 {
    position: absolute;
    width: 300px;
    top: 60%;
    left: 2%;
}

#preloader {
    width: 100%;
    height: 100vh;
    position: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    top: 0;
    left: 0;
    z-index: 10000;
    background: #fff;
}


#selectBox {
    position: relative;
    width: auto;
    margin-top: 20px;
}

select {
    width: 100%;
    padding: 10px;
    outline: none;
    border: none;
}


button {
    margin-top: 20px;
}
@media only screen and (max-width: 800px) and (orientation: portrait) {
    body {
        overflow: hidden;
    }

    iframe, #container, #graphicElem {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        height: calc(var(--vh, 1vh) * 100);
        margin: 0;
        padding: 0;
        background: transparent;
    }
    #container {
        display: block;
    }

    #graphicElem {
        background: url('images/phone-mobile.jpg') top center no-repeat;
        background-size: cover;
    }

    #qrCode, #logo, #reloadBtn {
        display: none;
    }

    #selectBox {
        margin: 0;
    }

    #selectOptions {
        position:fixed;
        top: 0;
        width: 100%;
        left: 0;
        display: flex;
        background: #333;
        padding: 2%;
        box-sizing: border-box;
        align-items: center;
        justify-content: space-between;
        transform: translateY(-100%);
    }
    button {
        margin-top: 0;
    }

    #arrow {
        position: absolute;
        width: 30px;
        height: 30px;
        overflow: hidden;
        border-radius: 0 0 10px 10px;
        background: rgba(0, 0, 0, 0.5);
        top: 100%;
    }
}