body {
    margin: 0;
    font-family: 'Orbitron', sans-serif;
    background: radial-gradient(circle at center, #1a1a1a, #000000);
    color: white;
    overflow: hidden;
    animation: bgPulse 10s infinite alternate;
  }
  @keyframes bgPulse {
    0% { background: radial-gradient(circle at center, #1a1a1a, #000000); }
    100% { background: radial-gradient(circle at center, #333333, #0f0f0f); }
  }
  header {
    text-align: center;
    padding: 20px;
    font-size: 2em;
    color: #00ffcc;
    text-shadow: 0 0 10px #00ffcc;
  }
  .track {
    position: relative;
    width: 60%;
    margin: 0 auto;
    height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: 20px;
  }  
  
  .lane {
    background: #222;
    border: 2px dashed #444;
    height: 60px;
    position: relative;
    overflow: hidden;
    border-radius: 10px;
  }
  .robot {
    width: 60px;
    height: 60px;
    background: #00ffcc;
    border-radius: 50%;
    position: absolute;
    top: 0;
    left: 0;
    transition: left 0.1s linear;
  }
  .bot1 { background: #ff0066; }
  .bot2 { background: #ffaa00; }
  .bot3 { background: #00aaff; }
  .you { background: #00ffcc; box-shadow: 0 0 15px #00ffcc; }
  footer {
    text-align: center;
    font-size: 1.2em;
    margin-top: 10px;
  }
  .input-zone, .file-zone {
    width: 100%;
    text-align: center;
    margin-top: 10px;
  }
  input[type="text"], select {
    padding: 10px;
    font-size: 1.2em;
    width: 80%;
    border: none;
    border-radius: 8px;
    outline: none;
    margin-bottom: 10px;
  }
  .reference {
    text-align: center;
    font-size: 1em;
    margin-top: 5px;
    color: #ccc;
    padding: 0 20px;
  }
  #countdown {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%,-50%);
    font-size: 4em;
    font-weight: bold;
    color: #00ffcc;
    z-index: 10;
    text-shadow: 0 0 15px #00ffcc;
  }
  button {
    background: #00ffcc;
    border: none;
    padding: 12px 30px;
    border-radius: 10px;
    font-size: 1.2em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px #00ffcc;
  }
  button:hover {
    transform: scale(1.1);
    background: #00e6b8;
  }
  @keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.6; }
    100% { transform: scale(1); opacity: 1; }
  }