* {
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to right, #000000, #0c0c0c);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    padding: 20px;
    text-align: center;
  }
  
  h1 {
    font-size: 2.8rem;
    margin-bottom: 30px;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.4);
  }
  
  .countdown {
    display: flex;
    gap: 25px;
    font-size: 2.5rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .unit {
    background: rgba(80, 80, 80, 0.651);
    border-radius: 15px;
    padding: 20px 30px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    min-width: 100px;
    transition: transform 0.3s ease;
  }
  
  .unit:hover {
    transform: scale(1.05);
  }
  
  .unit span {
    display: block;
    font-size: 1rem;
    color: #d1d5db;
    margin-top: 10px;
  }
  
  @media (max-width: 600px) {
    h1 {
      font-size: 2rem;
    }
  
    .countdown {
      font-size: 1.8rem;
      gap: 15px;
    }
  
    .unit {
      padding: 15px 20px;
    }
  }