@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700&display=swap');

    :root {
      --primary: #ff6b6b;
      --secondary: #4ecdc4;
      --accent: #ffe66d;
      --dark: #2d2d44;
      --darker: #1a1a2e;
      --light: #f8f9fa;
      --text: #ffffff;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: 'Orbitron', sans-serif;
      background: linear-gradient(135deg, var(--darker) 0%, #0f3460 100%);
      color: var(--text);
      overflow: hidden;
      position: fixed;
      width: 100%;
      height: 100%;
    }

    .screen {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      display: none;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      opacity: 0;
      transition: opacity 0.5s ease;
      pointer-events: none;
    }

    .screen.active {
      display: flex;
      opacity: 1;
      pointer-events: all;
    }

    /* --- Splash Screen --- */
    #splash-screen {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      position: relative;
      overflow: hidden;
    }

    #splash-3d-container {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: 1;
      pointer-events: none;
    }

    .splash-content {
      position: relative;
      z-index: 10;
      text-align: center;
      max-width: 500px;
      padding: 20px;
    }

    .splash-title {
      font-size: clamp(2.5rem, 10vw, 4.5rem);
      font-weight: 900;
      margin-bottom: 10px;
      letter-spacing: 3px;
      text-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
      animation: slideInDown 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    .splash-subtitle {
      font-size: clamp(1rem, 4vw, 1.5rem);
      margin-bottom: 40px;
      opacity: 0.95;
      animation: slideInUp 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    @keyframes slideInDown {
      from {
        transform: translateY(-50px);
        opacity: 0;
      }

      to {
        transform: translateY(0);
        opacity: 1;
      }
    }

    @keyframes slideInUp {
      from {
        transform: translateY(50px);
        opacity: 0;
      }

      to {
        transform: translateY(0);
        opacity: 1;
      }
    }

    .menu-container {
      display: flex;
      flex-direction: column;
      gap: 15px;
      width: 100%;
      max-width: 300px;
      margin: auto;
    }

    .btn {
      padding: 16px 32px;
      border: none;
      border-radius: 12px;
      font-size: 1.1rem;
      font-weight: 700;
      text-transform: uppercase;
      cursor: pointer;
      transition: all 0.3s ease;
      letter-spacing: 1px;
      position: relative;
      overflow: hidden;
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    }

    .btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: rgba(255, 255, 255, 0.2);
      transition: left 0.3s ease;
    }

    .btn:hover::before {
      left: 100%;
    }

    .btn-primary {


      background: linear-gradient(to bottom, #ffcc00, #ff9900);
      color: #fff;
      font-family: 'Orbitron', sans-serif;
      font-size: 20px;
      letter-spacing: 1px;
      text-transform: uppercase;
      padding: 14px 40px;
      border: none;
      border-radius: 10px;
      box-shadow: 0 6px #cc7a00;
      cursor: pointer;
      transition: all 0.2s ease;


    }

    .btn-primary:hover {


      background: linear-gradient(to bottom, #ffdd33, #ffb300);
      box-shadow: 0 4px #cc7a00;
      transform: translateY(2px);


    }

    .btn-primary:active {
      background: linear-gradient(to bottom, #ffb300, #ff9900);
      box-shadow: 0 2px #b36b00;
      transform: translateY(4px);
    }



    .btn-secondary {


      background: linear-gradient(to bottom, #00ffe0, #76b2ac);
      color: #FFF;
      font-family: 'Orbitron', sans-serif;
      font-size: 18px;
      letter-spacing: 1px;
      text-transform: uppercase;
      padding: 14px 36px;
      border: 2px solid #00ffe0;
      border-radius: 10px;
      box-shadow: 0 6px 0 #00a8a0, 0 0 20px #00ffe0 inset;
      cursor: pointer;
      text-shadow: 0 0 8px #00ffe0;
      transition: all 0.2s ease;



    }

    .btn-secondary:hover {
      box-shadow: 0 4px 0 #00a8a0, 0 0 25px #00fff6;
      transform: translateY(2px);
    }

    .btn-secondary:active {
      box-shadow: 0 2px 0 #008b86, 0 0 15px #00ccc0 inset;
      transform: translateY(4px);
     
    }

    .btn-danger {
      background: linear-gradient(135deg, #ff6b6b 0%, #d63031 100%);
       box-shadow: 0 6px 0 #ff6b6b, 0 0 20px #d63031 inset;
      color: white;width: 100%;
    }

    .btn-danger:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 35px rgba(255, 107, 107, 0.4);
    }

    /* --- Settings Screen --- */
    #settings-screen {
      background: linear-gradient(135deg, var(--darker) 0%, #0f3460 100%);
    }

    .settings-panel {
      background: rgba(45, 45, 68, 0.9);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      padding: 40px;
      max-width: 400px;
      border: 2px solid rgba(78, 205, 196, 0.3);
      min-width: 360px;
    }

    .settings-panel h1 {
      font-size: 2.5rem;
      margin-bottom: 30px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;text-align: center;
    }

    .setting-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
    }

    .setting-item label {
      font-weight: 600;
      font-size: 1rem;
    }

    .setting-item select {
      padding: 10px 15px;
      border-radius: 8px;
      border: 2px solid var(--secondary);
      background: rgba(255, 255, 255, 0.1);
      color: var(--text);
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s ease;
      width: 125px;
    }

    .setting-item select:hover {
      border-color: var(--primary);
      background: rgba(255, 255, 255, 0.15);
    }

    /* --- Game Screen --- */
    #game-screen {
      background: var(--darker);
      padding: 0;
    }

    #container {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
    }

    #game-ui {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      padding: 25px;
      pointer-events: none;
    }

    .ui-panel {
      background: rgba(45, 45, 68, 0.8);
      backdrop-filter: blur(10px);
      border-radius: 15px;
      padding: 15px 25px;
      border: 2px solid rgba(78, 205, 196, 0.3);
      pointer-events: all;
      transition: all 0.3s ease;
    }

    #game-score {
      font-size: clamp(1.5rem, 5vw, 2.5rem);
      font-weight: 900;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    #game-menu-btn {
      cursor: pointer;
      font-size: 1.8rem;
      font-weight: bold;
      transition: transform 0.2s ease;
    }

    #game-menu-btn:hover {
      transform: scale(1.15);
    }

    .rotation-controls {
      display: flex;
      gap: 12px;
      pointer-events: all;
    }

    .rotate-btn {
      width: 50px;
      height: 50px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--secondary), #45b7aa);
      border: none;
      color: white;
      font-size: 1.5rem;
      cursor: pointer;
      transition: all 0.2s ease;
      box-shadow: 0 4px 15px rgba(78, 205, 196, 0.3);
    }

    .rotate-btn:hover:not(:disabled) {
      transform: scale(1.1);
      box-shadow: 0 6px 20px rgba(78, 205, 196, 0.5);
    }

    .rotate-btn:active:not(:disabled) {
      transform: scale(0.95);
    }

    .rotate-btn:disabled {
      opacity: 0.4;
      cursor: not-allowed;
    }

    /* --- Overlays --- */
    .overlay {
      position: fixed;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%) scale(0.8);
      background: rgba(45, 45, 68, 0.95);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      padding: 50px;
      text-align: center;
      z-index: 200;
      display: none;
      opacity: 0;
      transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
      max-width: 90%;
      width: 400px;
      border: 2px solid rgba(78, 205, 196, 0.5);
    }

    .overlay.visible {
      display: block;
      opacity: 1;
      transform: translate(-50%, -50%) scale(1);
    }

    #gameWin {
      border-color: rgba(255, 215, 0, 0.5);
    }

    .overlay h2 {
      font-size: 2.5rem;
      margin-bottom: 20px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .overlay p {
      font-size: 1.1rem;
      margin-bottom: 30px;
      opacity: 0.9;
    }

    .overlay .btn {
      width: 100%;
    }

    /* --- Sound Toggle --- */
    .sound-toggle {
      position: fixed;
      bottom: 25px;
      right: 25px;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--secondary), #45b7aa);
      border: none;
      color: white;
      font-size: 1.5rem;
      cursor: pointer;
      transition: all 0.3s ease;
      box-shadow: 0 4px 15px rgba(78, 205, 196, 0.3);
      z-index: 150;
    }

    .sound-toggle:hover {
      transform: scale(1.1);
      box-shadow: 0 6px 20px rgba(78, 205, 196, 0.5);
    }

    .sound-toggle.muted {
      background: linear-gradient(135deg, #95a5a6, #7f8c8d);
    }

    @media (max-width: 600px) {
      .settings-panel {
        padding: 30px 20px;
      }

      .overlay {
        padding: 30px 20px;
        width: 85vw;
      }

      #game-ui {
        padding: 15px;
      }

      .ui-panel {
        padding: 10px 15px;
      }
    }