styles.css

.material-icons {
    font-family: 'Material Icons';
    font-weight: normal;
    font-style: normal;
    font-size: 34px;  /* Preferred icon size */
    display: inline-block;
    line-height: 1;
    text-transform: none;
    letter-spacing: normal;
    word-wrap: normal;
    white-space: nowrap;
    direction: ltr;
    color: #071821;

    /* Support for all WebKit browsers. */
    -webkit-font-smoothing: antialiased;
    /* Support for Safari and Chrome. */
    text-rendering: optimizeLegibility;

    /* Support for Firefox. */
    -moz-osx-font-smoothing: grayscale;

    /* Support for IE. */
    font-feature-settings: 'liga';
}
* {
    margin: 0;
    padding: 0;
    user-select: none;
}
body {
    background: #071821;
    font-family: 'VT323', monospace;
    overflow: hidden;
}
input[type=range] {
    width: 100%;
    margin: 0;
    background-color: transparent;
    -webkit-appearance: none;
}
input[type=range]:focus {
    outline: none;
}
input[type=range]::-webkit-slider-runnable-track {
    background: #071821;
    border: 0;
    border-radius: 25px;
    width: 100%;
    height: 6px;
    cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
    margin-top: -17px;
    width: 15px;
    height: 40px;
    background: #071821;
    border: 0;
    border-radius: 4px;
    cursor: pointer;
    -webkit-appearance: none;
}
input[type=range]:focus::-webkit-slider-runnable-track {
    background: #071821;
}
input[type=range]::-moz-range-track {
    background: #071821;
    border: 0;
    border-radius: 25px;
    width: 100%;
    height: 6px;
    cursor: pointer;
}
input[type=range]::-moz-range-thumb {
    width: 15px;
    height: 40px;
    background: #071821;
    border: 0;
    border-radius: 4px;
    cursor: pointer;
}
input[type=range]::-ms-track {
    background: transparent;
    border-color: transparent;
    border-width: 18px 0;
    color: transparent;
    width: 100%;
    height: 6px;
    cursor: pointer;
}
input[type=range]::-ms-fill-lower {
    background: #071821;
    border: 0;
    border-radius: 50px;
}
input[type=range]::-ms-fill-upper {
    background: #071821;
    border: 0;
    border-radius: 50px;
}
input[type=range]::-ms-thumb {
    width: 15px;
    height: 40px;
    background: #071821;
    border: 0;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 0px;
    /*Needed to keep the Edge thumb centred*/
}
input[type=range]:focus::-ms-fill-lower {
    background: #071821;
}
input[type=range]:focus::-ms-fill-upper {
    background: #071821;
}
@supports (-ms-ime-align:auto) {
    input[type=range] {
        margin: 0;
    }
}
.screen{
    display: block;
    box-sizing: border-box;
    margin: 0 auto;
    width: 100%;
    max-width: 760px;
    position: relative;
}
canvas {
    position: absolute;
    top: 12%;
    left: 18%;
    width: 64%;
    height: 76%;
    border: none;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    margin: 0 auto;
    display: block;
    z-index: 2;
}
.controls .btn-direction {
    position: absolute;
    left: 3%;
    top: 26px;
}
.controls .btn-direction:before {
    content: "";
    position: absolute;
    z-index: 1;
    top: 30px;
    left: 30px;
    width: 30px;
    height: 30px;
    background-color: #353535;
    border-radius: 100%;
}
.controls .btn-direction .vertical,
.controls .btn-direction .horizontal {
    position: absolute;
    left: 30px;
    width: 30px;
    height: 90px;
    background: #444;
    border-radius: 5px;
}
.controls .btn-direction .vertical:before,
.controls .btn-direction .horizontal:before {
    content: "";
    position: relative;
    top: 99px;
    left: 8px;
    width: 0;
    height: 0;
    border-left: 7px solid transparent;
    border-right: 7px solid transparent;
    border-top: 7px solid #dedede;
}
.controls .btn-direction .vertical:after,
.controls .btn-direction .horizontal:after {
    content: "";
    position: relative;
    top: -27px;
    left: -5.6px;
    width: 0;
    height: 0;
    border-left: 7px solid transparent;
    border-right: 7px solid transparent;
    border-bottom: 7px solid #dedede;
}
.controls .btn-direction .horizontal {
    -webkit-transform: rotate(90deg);
    -moz-transform: rotate(90deg);
    -ms-transform: rotate(90deg);
    -o-transform: rotate(90deg);
    transform: rotate(90deg);
}
.controls .btn-AB {
    position: absolute;
    top: 40px;
    right: 3%;
    width: 130px;
    height: 60px;
    background: #dfdfdf;
    border-radius: 30px;
    -webkit-transform: rotate(-25deg);
}
.controls .btn-AB:after {
    content: "";
    position: absolute;
    top: 8px;
    right: 9px;
    width: 44px;
    height: 44px;
    background: #a93671;
    box-shadow: 68px 0 #a93671;
    border-radius: 100%;
    -webkit-transform: rotate(180deg);
}
.btn-start-select {
    position: absolute;
    top: 60px;
    left: 50%;
    margin-left: -72px;
    height: 12px;
    width: 60px;
    background-color: #999;
    border-radius: 10px;
    -webkit-transform: rotate(-25deg);
    box-shadow: 0 0 0 5px #dfdfdf;
    cursor: pointer;
    transition: background-color 0.2s;
}
.btn-start-select:active {
    background-color: #555;
}

.imageGB{
    display: block;
    width: 100%;
    position: relative;
}
#fullscreenMode {
    font-size: 50px;
    line-height: 60px;
    cursor: pointer;
    position: absolute;
    top: 10%;
    left: 5%;
    color: #071821;
    z-index: 3;
    padding: 0px;
    font-weight: 700;
}
#volume {
    transform: rotate(
            270deg);
    position: absolute;
    top: 53.5%;
    right: -13%;
    width: 51%;
    z-index: 3;
}
#switch-light {
    position: absolute;
    top: 35.6%;
    left: 6%;
    width: 3.2%;
    height: 4%;
    border-radius: 50%;
    transition: background-color 0.2s;
    background-color: rgba(0,0,0,1);
    border: 2px solid #071821;
}
#switch-light.active {
    background-color: rgba(255,69,0,0.5);
}
#palette {
    position: absolute;
    bottom: 6%;
    left: 24%;
    width: 58%;
    z-index: 3;
}
.controls{
    position: relative;
    width: 100%;
    max-width: 760px;
    display: block;
    margin: 0 auto;
}

#start {
    margin-left: 20px;
}
#preloader {
    display: block;
    color: #071821;
    font-size: 70px;
    text-align: center;
    z-index: 2;
    position: absolute;
    top: 34.2%;
    width: 64%;
    left: 18%;
}
.btn {
    position: absolute;
    width: 42px;
    height: 44px;
    display: block;
    border-radius: 50%;
    background-color: rgba(0,0,0,0.0);
    transition: background-color 0.2s;
    z-index: 2;
    outline: none;
    color: #fff;
    padding: 13px 0;
    text-align: center;
    box-sizing: border-box;
    cursor: pointer;
}
.btn_A {
    top: 8px;
    left: 10px;
}
.btn_B {
    top: 8px;
    right: 10px;
}
.arrow {
    position: absolute;
    width: 30px;
    height: 30px;
    display: block;
    border-radius: 4px;
    background-color: rgba(0,0,0,0.0);
    transition: background-color 0.2s;
    z-index: 2;
    outline: none;
    cursor: pointer;
}
.arrow_left,
.arrow_down {
    bottom: 0;
    left: 0;
}
.arrow_right,
.arrow_up {
    top: 0;
    left: 0;
}
.arrow:active,
.btn:active {
    background-color: rgba(0,0,0,0.4);
}
.palette-icon {
    position: absolute;
    display: block;
    bottom: 4%;
    left: 17.6%;
}
.volume-icon {
    position: absolute;
    display: block;
    top: 10%;
    font-size: 48px;
    left: 85.75%;
}
.glass {
    display: block;
    width: 100%;
    position: relative;
    height: 0;
    padding-bottom: 75%;
    background: #455c71;
    border-radius: 4% 4% 14% 4%;
    overflow: hidden;
    border: 8px solid #060506;
    box-sizing: border-box;
}
.glass:before {
    content: '';
    position: absolute;
    display: block;
    top: 11%;
    left: 17.5%;
    width: 65.2%;
    height: 0;
    padding-bottom: 59.8%;
    background: #675300;
}
.glass__title{
    width: 90%;
    display: block;
    position: absolute;
    top: 4%;
    left: 5%;
    font-size: 10px;
    color: #bbb;
    text-align: center;
    border-top: 3px solid #000;
    border-bottom: 3px solid #000;
}
@media only screen and (max-width: 560px) {
    .btn-start-select {
        top: 140px;
    }
    input[type=range]::-webkit-slider-thumb {
        margin-top: -12px;
        height: 30px;
    }
    input[type=range]::-moz-range-thumb {
        margin-top: -12px;
        height: 30px;
    }
    input[type=range]::-ms-thumb {
        margin-top: -12px;
        height: 30px;
    }
    #volume {
        right: -13%;
    }
    #fullscreenMode {
        left: 2%;
    }
    #palette {
        bottom: 6%;
    }
    #preloader {
        font-size: 30px;
    }
    .volume-icon {
        font-size: 32px;
    }
    .palette-icon {
        font-size: 26px;
        bottom: 3%;
    }
    .controls .btn-AB {
        right: 0;
    }
}
@media only screen and (max-width: 470px) {
    input[type=range]::-webkit-slider-thumb {
        margin-top: -8px;
        height: 22px;
    }
    input[type=range]::-moz-range-thumb {
        margin-top: -8px;
        height: 22px;
    }
    input[type=range]::-ms-thumb {
        margin-top: -8px;
        height: 22px;
    }
    #volume {
        right: -14%;
    }
    #palette {
        left: 26%;
        width: 56%;
        bottom: 5.3%;
    }
    .palette-icon {
        font-size: 20px;
    }
    .volume-icon {
        font-size: 26px;
    }
    .btn-start-select {
        top: 156px;
    }
}