body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    background: #121212;
    overflow: hidden;
    font-family: 'Comfortaa', Arial, sans-serif;
  }

  .navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #ffffff;
    padding: 10px 20px;
    max-width: 800px;   
    margin: 20px auto 0 auto; 
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    z-index: 100000; 
    position: relative; 
  }

  .navbar .logo { height: 50px; }
  .navbar .menu { display: flex; gap: 20px; }
  .navbar .menu a {
    text-decoration: none;
    color: #121212;
    font-weight: bold;
    font-size: 16px;
    transition: color 0.3s;
  }
  .navbar .menu a:hover { color: #1ff1fc; }

  canvas {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
  }

  .center-placeholder {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40vw;
    min-height: 80px;
    padding: 20px 20px;
    font-size: 18px;
    line-height: 1.5;
    color: #000;
    background: #fff;
    border: 2px solid #1ff1fc;
    border-radius: 15px;
    text-align: center;
    cursor: text;
    z-index: 10;
    outline: none;
    resize: none;
    overflow: hidden;
    box-sizing: border-box;
    transition: height 0.2s ease;
  }