body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #0b0c10;
    color: #c5c6c7;
    display: flex;
    justify-content: center;
    padding: 20px;
  }
  
  .container {
    max-width: 1100px;
    width: 100%;
  }
  
  header {
    border-bottom: 2px solid #1f2833;
    margin-bottom: 20px;
    padding-bottom: 10px;
  }
  
  h1 {
    color: #66fcf1;
    margin: 0 0 5px 0;
    text-shadow: 0 0 10px rgba(102, 252, 241, 0.3);
  }
  
  .layout {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
  }
  
  .panel {
    flex: 1;
    min-width: 280px;
    background: #1f2833;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
  }
  
  h2 {
    font-size: 1.2rem;
    color: #45a29e;
    margin-top: 0;
    border-bottom: 1px solid #333;
    padding-bottom: 10px;
  }
  
  label {
    display: flex;
    flex-direction: column;
    margin-bottom: 15px;
    font-size: 0.9rem;
    font-weight: bold;
  }
  
  span { color: #66fcf1; }
  
  input[type="range"] { margin-top: 8px; cursor: pointer; }
  
  button {
    width: 100%; padding: 12px; margin-top: 10px; border: none; border-radius: 4px;
    font-weight: bold; font-size: 1rem; cursor: pointer; transition: 0.2s;
  }
  
  .btn-primary { background: #66fcf1; color: #0b0c10; }
  .btn-primary:hover { background: #45a29e; }
  .btn-secondary { background: transparent; border: 1px solid #ff3b3b; color: #ff3b3b; }
  .btn-secondary:hover { background: #ff3b3b; color: white; }
  
  .screen {
    flex: 2;
    min-width: 400px;
    background: #000;
    border-radius: 8px;
    border: 1px solid #1f2833;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: inset 0 0 50px rgba(0,0,0,0.8);
  }
  
  canvas {
    background: transparent;
    max-width: 100%;
  }