body {
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23abd5, #23a6d5);
    background-size: 400% 400%;
    color: #fff;
    font-family: sans-serif;
    font-size: 2em;
    text-align: center;
    animation: gradient 150s ease infinite;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

canvas {
    height: 70vh;
}

.navbar {
    height: 62px;
    width: 100%;
    position: fixed;
    background: white;
    top: 0;
    left: 0;
    opacity: 0.65;
    text-align: center;
}

.logo-img {
    z-index: 10;
    position: fixed;
    width: 150px;
    margin-left: -80px;
}

.gamepad {
    height: 130px;
    width: 100%;
    position: fixed;
    bottom: 0;
    left: 0;
}

.controls_1 {
    height: 50px;
    width: 50px;
    border: 0px solid black;
    z-index: 10;
    margin-top: 40px;
}

#arrow-right {
    position: absolute;
    margin-left: 90px;
    font-size: 60px;
    background: transparent;
    border: none;
    outline-style: none;
    cursor: pointer;
    color: #424242;
}

#arrow-left {
    position: absolute;
    font-size: 60px;
    background: transparent;
    border: none;
    outline-style: none;
    cursor: pointer;
    color: #424242;
}

.controls_2 {
    margin-top: -40px;
    height: 50px;
    width: 100%;
    border: 0px solid black;
    z-index: 9;
}

#pause_game {
    position: absolute;
    right: 70px;
    margin-top: 9px;
    font-size: 40px;
    background: transparent;
    color: #424242;
    border: none;
    z-index: 10;
    outline-style: none;
    cursor: pointer;
}

#continue_game {
    display: none;
    position: absolute;
    right: 77px;
    margin-top: 15px;
    font-size: 30px;
    background: transparent;
    color: #424242;
    border: none;
    z-index: 10;
    outline-style: none;
    cursor: pointer;
}

#rotate_piece {
    position: absolute;
    right: 30px;
    margin-top: 0px;
    font-size: 40px;
    background: transparent;
    color: #424242;
    border: none;
    outline-style: none;
    cursor: pointer;
}

#arrow-down {
    position: absolute;
    right: 120px;
    margin-top: -5px;
    font-size: 55px;
    background: transparent;
    color: #424242;
    border: none;
    outline-style: none;
    cursor: pointer;
}

#start_game {
    position: absolute;
    right: 10px;
    margin-top: 8px;
    font-size: 40px;
    background: transparent;
    color: #424242;
    border: none;
    z-index: 10;
    outline-style: none;
    cursor: pointer;
}

#restart_game {
    display: none;
    position: absolute;
    right: 10px;
    margin-top: 8px;
    font-size: 40px;
    background: transparent;
    color: #424242;
    border: none;
    z-index: 10;
    outline-style: none;
    cursor: pointer;
}

#music_game {
    position: absolute;
    left: 90px;
    margin-top: 15px;
    font-size: 30px;
    background: transparent;
    color: #424242;
    border: none;
    z-index: 10;
    outline-style: none;
    cursor: pointer;
}

#music_game:hover {
    opacity: 0.55;
}

#demo-img {
    position: fixed;
    height: 300px;
    margin-left: -92px;
    margin-top: 150px;
    filter: drop-shadow(0 0 0.15rem black);
}

#gamepad_controls {
    font-size: 30px;
    background: transparent;
    color: #424242;
    border: none;
    z-index: 10;
    outline-style: none;
    cursor: pointer;
}

.dropdown {
    position: absolute;
    left: 10px;
    margin-top: 8px;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #fff;
    margin-top: 40px;
    min-width: 160px;
    height: 170px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    padding: 12px 16px;
    z-index: 1;
    color: black;
    font-size: 18px;
    border-radius: 5px;
}

.dropdown:hover .dropdown-content {
    display: block;
}

#score {
    border: 0px solid black;
    font-size: 24px;
    margin-top: -10px;
    margin-bottom: 5px;
}

#levels {
    border: 0px solid black;
    position: fixed;
    top: 60px;
    right: 10px;
    font-size: 15px;
}

@media all and (max-width: 800px) {
    .dropdown {
        display: none;
    }

    #music_game {
        left: 10px;
    }

    #start_game {
        margin-top: 70px;
    }

    #restart_game {
        opacity: 0;
    }

    #pause_game {
        right: 10px;
    }

    #continue_game {
        right: 15px;
    }
}

@media all and (min-width: 801px) {
    .controls_1 {
        display: none;
    }

    .controls_2 {
        display: none;
    }
}

@media all and (max-width: 500px) {
    canvas {
        height: 60vh;
    }
}

@media all and (max-width: 350px) {
    #rotate_piece {
        font-size: 40px;
    }

    #arrow-down {
        display: none;
    }

    #arrow-right {
        font-size: 50px;
    }

    #arrow-left {
        font-size: 50px;
    }
}