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;
     }
 }