#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #0c0c0c;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
  }

  .loader {
    width: 60px;
    height: 60px;
    position: relative;
  }

  .loader:before,
  .loader:after {
    content: "";
    position: absolute;
    border: 4px solid #00f3ff;
    opacity: 1;
    border-radius: 50%;
    animation: pulse 1.5s cubic-bezier(0, 0.2, 0.8, 1) infinite;
  }

  .loader:after {
    animation-delay: -0.75s;
  }

  @keyframes pulse {
    0% {
      top: 30px;
      left: 30px;
      width: 0;
      height: 0;
      opacity: 1;
    }

    100% {
      top: 0;
      left: 0;
      width: 60px;
      height: 60px;
      opacity: 0;
    }
  }

  .loader-text {
    color: #fff;
    margin-top: 100px;
    font-family: 'Days One', sans-serif;
    letter-spacing: 2px;
    position: absolute;
    width: 100%;
    text-align: center;
  }

  
  body {
    background: linear-gradient(135deg, #0b132b 0%, #1c2541 100%);
    overflow-x: hidden;
  }

  .whole-container {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease, transform 1s ease;
  }

  .title {
    font-family: 'Orbitron', sans-serif;
    font-size: 36px;
    text-align: center;
    margin: 20px 0;
    color: #fff;
    text-shadow: 0 0 10px #00f3ff, 0 0 20px #00f3ff, 0 0 30px #00f3ff;
    animation: glow 2s ease-in-out infinite alternate;
    letter-spacing: 3px;
  }

  @keyframes glow {
    from {
      text-shadow: 0 0 10px #00f3ff, 0 0 20px #00f3ff, 0 0 30px #00f3ff;
    }

    to {
      text-shadow: 0 0 15px #00f3ff, 0 0 25px #00f3ff, 0 0 35px #00f3ff, 0 0 45px #00f3ff;
    }
  }

  main {
    display: flex;
    justify-content: center;
    padding: 20px;
    gap: 30px;
    flex-wrap: wrap;
  }

  .instruction-container,
  .puyo-container,
  .game-info-container {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .instruction-container:hover,
  .game-info-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
  }

  .keys-instruction {
    color: #fff;
    list-style: none;
    padding: 10;
    margin: auto;
  }

  .keys-instruction div {
    margin-bottom: 15px;
    font-family: 'Days One', sans-serif;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .keys-instruction i {
    color: #00f3ff;
  }

  .instruction-content {
    margin-top: 20px;
  }

  .play-symbol {
    background: linear-gradient(45deg, #00f3ff, #9d00ff);
    border: none;
    border-radius: 50px;
    padding: 12px 20px;
    color: white;
    font-family: 'Days One', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 243, 255, 0.4);
    display: flex;
    align-items: center;
    gap: 10px;
    width: auto !important;
    margin: auto !important;
  }

  .play-symbol:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 243, 255, 0.6);
  }

  .drop-down-instruction {
    color: #fff;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    padding: 15px;
    margin-top: 15px;
    display: none;
    animation: fadeIn 0.5s ease;
  }

  @keyframes fadeIn {
    from {
      opacity: 0;
    }

    to {
      opacity: 1;
    }
  }

  .puyo-container {
    padding: 10px;
    background: rgba(0, 0, 0, 0.3);
  }

  #puyo-canvas,
  #next-puyo-canvas {
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
  }

  .buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
  }

  .buttons button {
    background: linear-gradient(45deg, #3498db, #2980b9);
    border: none;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
  }

  .buttons button:active,
  .buttons button:hover {
    box-shadow: 0 10px 25px rgba(52, 152, 219, 0.6);
  }

  #restart-button {
    background: linear-gradient(45deg, #e74c3c, #c0392b);
    box-shadow: 0 5px 15px rgba(231, 76, 60, 0.4);
  }

  #mute-button {
    background: linear-gradient(45deg, #9b59b6, #8e44ad);
    box-shadow: 0 5px 15px rgba(155, 89, 182, 0.4);
  }

  .restart-text {
    position: absolute;
    bottom: -25px;
    font-family: 'Days One', sans-serif;
    font-size: 12px;
    color: white;
    opacity: 0;
    transition: opacity 0.3s ease;
  }

  #restart-button:hover .restart-text {
    opacity: 1;
  }

  .stats {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .next-piece-board {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    padding: 10px;
    text-align: center;
  }

  .next-text {
    color: white;
    font-family: 'Days One', sans-serif;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
  }

  .score-board {
    background: linear-gradient(45deg, #2ecc71, #27ae60);
    border-radius: 10px;
    color: white;
    font-family: 'Orbitron', sans-serif;
    font-size: 20px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(46, 204, 113, 0.4);
    animation: pulse-score 2s infinite;
    margin-bottom: 40%;
    margin-left: 0px !important;
  }

  @keyframes pulse-score {
    0% {
      transform: scale(1);
    }

    50% {
      transform: scale(1.05);
    }

    100% {
      transform: scale(1);
    }
  }

  
  .modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(10px);
  }

  .modal-content,
  .end-modal-content {
    background: linear-gradient(135deg, #0b132b 0%, #1c2541 100%);
    padding: 40px;
    border-radius: 20px;
    max-width: 500px;
    text-align: center;
    box-shadow: 0 0 50px rgba(0, 243, 255, 0.7);
    border: 2px solid #00f3ff;
    animation: modal-appear 0.5s ease-out;
    position: relative;
    overflow: hidden;
  }

  .modal-content:before,
  .end-modal-content:before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(0, 243, 255, 0.1), transparent);
    transform: rotate(45deg);
    animation: shine 3s infinite;
  }

  @keyframes shine {
    0% {
      transform: translateX(-100%) rotate(45deg);
    }

    100% {
      transform: translateX(100%) rotate(45deg);
    }
  }

  @keyframes modal-appear {
    0% {
      transform: scale(0.8) translateY(50px);
      opacity: 0;
    }

    100% {
      transform: scale(1) translateY(0);
      opacity: 1;
    }
  }

  .modal-content h3,
  .end-modal-content h1 {
    color: #fff;
    font-family: 'Orbitron', sans-serif;
    margin-bottom: 20px;
    text-shadow: 0 0 10px #00f3ff;
  }

  .modal-content p {
    color: #fff;
    font-family: 'Days One', sans-serif;
    margin-bottom: 10px;
    line-height: 1.6;
  }

  .enter-to-play {
    margin-top: 30px;
    font-size: 18px;
  }

  .enter-to-play span {
    color: #00f3ff;
    font-weight: bold;
    text-shadow: 0 0 5px #00f3ff;
  }

  #red-color {
    color: #00f3ff;
    font-weight: bold;
  }

  
  .particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
  }

  .particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(0, 243, 255, 0.3);
    animation: float 15s infinite linear;
  }

  @keyframes float {
    0% {
      transform: translateY(100vh) rotate(0deg);
      opacity: 0;
    }

    10% {
      opacity: 1;
    }

    90% {
      opacity: 1;
    }

    100% {
      transform: translateY(-100px) rotate(360deg);
      opacity: 0;
    }
  }

  
  #mobile-controls {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(11, 19, 43, 0.9);
    padding: 10px 0;
    z-index: 999;
    box-shadow: 0 -5px 15px rgba(0, 243, 255, 0.2);
  }

  .mobile-control-row {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 10px;
  }

  .mobile-btn {
    background: rgba(0, 243, 255, 0.2);
    border: 2px solid #00f3ff;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #00f3ff;
    font-size: 24px;
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.4);
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
  }

  .mobile-btn:active {
    background: rgba(0, 243, 255, 0.5);
  }

  .start-btn {
    width: 90%;
    border-radius: 10px;
    height: 45px;
    font-size: 16px;
    font-family: 'Orbitron', sans-serif;
  }

  @media (max-width: 768px) {

    html,
    body {
      height: 100%;
      margin: 0;
      padding: 0;
      overflow: hidden;
    }

    .whole-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      height: calc(100vh - 130px);
      margin: 0 auto;
    }

    main {
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 0 !important;
      margin: 0;
      width: 100%;
    }

    .instruction-container,
    .keys-instruction {
      display: none;
    }

    .game-info-container {
      width: 90%;
      max-width: 320px;
      padding: 10px;
      box-sizing: border-box;
      margin-bottom: -10px;
    }

    #mobile-controls {
      display: block;
    }
  }

  @media (max-width: 480px) {
    .title {
      font-size: 24px;
      margin: 0;
      padding: 5px 0;
    }

    .whole-container {
      height: calc(100vh - 130px);
      justify-content: space-evenly;
    }

    .game-info-container {
      width: 95%;
      padding: 5px;
      max-width: 340px;
      margin-bottom: 0px;
    }

    .buttons {
      gap: 15px;
      margin-bottom: 5px;
    }

    .buttons button {
      width: 45px;
      height: 45px;
    }

    .buttons button i {
      font-size: 20px;
    }

    .puyo-container {
      transform: scale(0.85);
      transform-origin: center top;
      margin: 0 auto;
    }

    main {
      padding: 0;
      gap: 0px;
    }
  }