style.css

body {
    height: 100vh;
    width: 100%;
    margin: 0;
    overflow: hidden;
    background-color: #79838b;
    display: flex;
    flex-flow: column;
    position: relative;
}

.bg {
    position: relative;
    width: 100%;
    height: 100vh;
    max-height: 500px;
    background-image: url("https://user-images.githubusercontent.com/26748614/96336781-733b6f80-1082-11eb-82a6-9b422f8f91c1.jpg");
    background-size: contain;
    background-repeat: repeat-x;
    background-position: 50% 50%;
}

.pngLights {
    position: absolute;
    z-index: 8;
    width: 100%;
    height: 100vh;
    max-height: 500px;
    background-image: url("https://user-images.githubusercontent.com/26748614/96336791-759dc980-1082-11eb-85cb-c8761a9a5672.png"), url("https://user-images.githubusercontent.com/26748614/96336777-72a2d900-1082-11eb-9422-8f2ca0a4f302.png"), url("https://user-images.githubusercontent.com/26748614/96336777-72a2d900-1082-11eb-9422-8f2ca0a4f302.png");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: 50% -22px;
}

.pngLights.active {
    background-image: url("https://user-images.githubusercontent.com/26748614/96336791-759dc980-1082-11eb-85cb-c8761a9a5672.png"), url("https://user-images.githubusercontent.com/26748614/96336777-72a2d900-1082-11eb-9422-8f2ca0a4f302.png"), url("");
}

.cc {
    width: 100%;
    height: 100vh;
    position: absolute;
    top: 0;
    left: 0;
}

#canvas_container1 {
    max-height: 500px;
    z-index: 1;
}

#canvas_container2 {
    height: 100vh;
    z-index: 2;
}

.floor {
    flex: 1 1 auto;
    background-image: url("https://user-images.githubusercontent.com/26748614/96336787-746c9c80-1082-11eb-941f-7846cba8223b.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    background-position: 50% 0%;
}


/****   Buttons   *****/
.buttons {
    position: absolute;
    width: 100%;
    height: 100vh;
    max-height: 500px;
}

.btn {
    position: absolute;
    bottom: 5%;
    z-index: 10;
    border: 1px solid white;
    border-radius: 5px;
    padding: 3px 15px;
    background-color: #1f1f1f;
    color: #fdfcfc;
    -webkit-font-smoothing: antialiased;
    font-size: 18px;
    font-family: 'Rajdhani', sans-serif;
    letter-spacing: 1px;
    cursor: pointer;
    user-select: none;
    box-shadow: 5px 3px 12px 0px rgba(0, 0, 0, 0.75);
    transition: color .3s;
}

.btn_Works {
    left: 5%;
    text-decoration: none;
}

.btn_Light {
    left: 50%;
    transform: translateX(-50%);
    transform-origin: 25% 50%;
    color: #feaeae;
}

.btn_Works:hover {
    background-color: #3d3d3d;
    color: #6286f4;
}

.btn_Light:hover {
    background-color: #3d3d3d;
    color: #da1616;
}

.btn_Light.blink {
    animation: blinkAni 500ms;
}

@keyframes blinkAni {
    0% {
        background: #f5f6e4;
        transform: scale(1) translateX(-50%);
    }
    50% {
        transform: scale(1.2) translateX(-50%);
    }
    100% {
        transform: scale(1) translateX(-50%);
    }
}

@media only screen and (max-height: 350px) {
    .btn {
        font-size: 4.5vh;
        bottom: 2%;
        box-shadow: none;
        color: #fdfcfc;
    }
}