body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto;
    background: #f6f6f6;
    color: #111;
  }

  .container {
    max-width: 900px;
    margin: 60px auto;
    padding: 20px;
  }

  h1 {
    font-size: 40px;
    margin-bottom: 10px;
  }

  .sub {
    color: #666;
    margin-bottom: 30px;
  }

  .input-box {
    display: flex;
    gap: 10px;
  }

  input {
    flex: 1;
    padding: 14px;
    font-size: 16px;
    border: 1px solid #ddd;
    border-radius: 10px;
  }

  button {
    padding: 14px 20px;
    background: black;
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
  }

  button:hover {
    opacity: 0.8;
  }

  .grid {
    margin-top: 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .card {
    background: white;
    border: 1px solid #eee;
    border-radius: 12px;
    padding: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: 0.2s;
  }

  .card:hover {
    transform: translateY(-2px);
  }

  .title {
    font-size: 15px;
    flex: 1;
    padding-right: 10px;
  }

  .copy {
    font-size: 12px;
    background: #f2f2f2;
    border: none;
    padding: 6px 10px;
    border-radius: 8px;
    cursor: pointer;
  }

  .loading {
    margin-top: 20px;
    color: #888;
  }

  @media (max-width: 600px) {
    .grid {
      grid-template-columns: 1fr;
    }
  }