:root {
    --primary: #6C5CE7;
    --primary-dark: #5649C0;
    --secondary: #00CEFF;
    --accent: #FF7675;
    --background: #F9F9FF;
    --text: #2D3436;
    --text-light: #636E72;
    --success: #00B894;
    --warning: #FDCB6E;
    --error: #D63031;
    --border-radius: 12px;
    --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
  }
  
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    font-family: "Poppins", sans-serif;
  }

  html {
    height: 100%;
    overflow: hidden;
    overscroll-behavior: none
  }
  
  body {
    font-family: 'Poppins', Arial, sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    padding: 20px;
    height: 100%;
    display: flex;
    flex-direction: column;
    max-width: 100%;
    overflow: hidden;
  }
  
  section:not(#game) {
    display: none;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    padding: 25px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    animation: fadeIn 0.5s ease;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  h1, h2, h3 {
    color: var(--primary);
    margin-bottom: 10px;
  }
  
  h1 {
    font-size: 2rem;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-align: center;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  p {
    color: var(--text-light);
    margin-bottom: 15px;
  }
  
  input, button {
    font-family: 'Poppins', Arial, sans-serif;
    transition: var(--transition);
    border-radius: var(--border-radius);
    border: none;
    outline: none;
  }
  
  input {
    padding: 12px 15px;
    border: 2px solid #E0E0E0;
    width: 100%;
    font-size: 1rem;
  }
  
  input:focus {
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(0, 206, 255, 0.2);
  }
  
  button {
    padding: 12px 20px;
    background-color: var(--primary);
    color: white;
    font-weight: 600;
    cursor: pointer;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  
  section:not(#game) button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
  }
  
  button:active {
    transform: translateY(0);
  }
  
  button:disabled {
    background-color: #B2B2B2;
    cursor: not-allowed;
    transform: none !important;
  }
  
  #messages {
    border: 2px solid #E0E0E0;
    height: 300px;
    overflow-y: auto;
    padding: 15px;
    border-radius: var(--border-radius);
    background-color: #F8F9FA;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  
  .message {
    padding: 10px 15px;
    border-radius: 18px;
    max-width: 80%;
    word-wrap: break-word;
  }
  
  .user-message {
    align-self: flex-end;
    background-color: var(--secondary);
    color: white;
    border-bottom-right-radius: 5px;
  }
  
  .system-message {
    align-self: center;
    background-color: #E0E0E0;
    color: var(--text-light);
    font-size: 0.9rem;
  }
  
  .user-connected {
    color: var(--success);
    font-weight: 600;
  }
  
  .user-disconnected {
    color: var(--error);
    font-weight: 600;
  }
  
  .key-code-input {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    justify-content: center;
  }
  
  .key-code-input input {
    width: 60px;
    height: 60px;
    text-align: center;
    font-size: 24px;
    font-weight: bold;
    border: 3px solid #E0E0E0;
    border-radius: 15px;
  }
  
  .key-code-input input:focus {
    border-color: var(--primary);
  }
  
  #userList {
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 10px;
  }
  
  #chatScreen {
    display: none;
  }
  
  #messageInput {
    margin-top: 10px;
  }
  
  #sendButton {
    margin-top: 10px;
    width: 100%;
  }
  
  .start-pressed {
    background-color: var(--success) !important;
    transform: scale(1.05) !important;
  }
  
  .game-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 15px;
    margin-bottom: 15px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
  }
  
  .game-card:hover {
    transform: translateY(-5px);
  }
  
  .game-card img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 10px;
    aspect-ratio: 16/9;
    object-fit: cover;
  }
  
  .game-card button {
    width: 100%;
    margin-top: 10px;
    position: relative;
    overflow: hidden;
  }
  
  .game-card button:not([disabled]) {
    background-color: var(--success);
  }
  
  .game-card button:not([disabled])::after {
    content: "Click to play";
    display: block;
  }
  
  .game-card button[disabled]::after {
    content: "Wrong player count";
    display: block;
  }
  
  #game {
    padding: 0;
    overflow: hidden;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
  
  #welcome-players-container {
    display: flex;
    flex-direction: row;
    gap: 15px;
    margin: 20px 0;
    flex-wrap: wrap;
  }
  
  .welcome-player {
    background: #F1F3FE;
    padding: 15px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
  }
  
  .welcome-player:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  }
  
  .welcome-player p {
    color: var(--primary);
    font-weight: 600;
    margin: 0;
  }

  input::-webkit-outer-spin-button,
  input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
  }

  /* Firefox */
  input[type=number] {
    -moz-appearance: textfield;
  }
  
  /* Mobile responsiveness */
  @media (max-width: 600px) {
    body {
      padding: 10px;
    }
    
    section {
      padding: 20px 15px;
    }
    
    h1 {
      font-size: 1.8rem;
    }
    
    /* .key-code-input input {
      width: 50px;
      height: 50px;
      font-size: 20px;
    } */
    
    #messages {
      height: 250px;
    }

  }
  
  @media (max-width: 400px) {
    /* .key-code-input input {
      width: 40px;
      height: 40px;
      font-size: 18px;
    } */
    
    #welcome-players-container {
      grid-template-columns: 1fr 1fr;
    }
  }
  
  /* Loading animation */
  @keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
  }
  
  #loading h2 {
    animation: pulse 1.5s infinite;
    text-align: center;
    color: var(--primary);
  }