.code-box { height: 220px; resize: vertical; font-family: monospace; }
    .result-container { display: flex; gap: 20px; margin-top: 30px; flex-wrap: wrap; }
    .result-block { flex: 1; min-width: 48%; background: #fff; border: 1px solid #ccc; padding: 0; overflow-x: auto; border-radius: 5px; box-shadow: 0 0 5px rgba(0,0,0,0.1); }
    .result-title { background: #343a40; color: white; padding: 10px; font-weight: bold; border-top-left-radius: 5px; border-top-right-radius: 5px; }
    .line { white-space: pre-wrap; padding: 5px 10px; margin: 0; }
    .same-line { background-color: #ffffff; }
    .removed-line { background-color: #ffeef0; color: #b31d28; }
    .added-line { background-color: #e6ffed; color: #22863a; }
    .modified-word ins { background: #c8e6c9; text-decoration: none; }
    .modified-word del { background: #fbcaca; text-decoration: none; }
    footer { text-align: center; margin-top: 40px; font-size: 14px; color: #777; }
    .btn-copy { margin-top: 10px; font-size: 0.9rem; }
    @media print {
      body * { visibility: hidden; }
      .result-container, .result-container * { visibility: visible; }
      .result-container { position: absolute; top: 0; left: 0; width: 100%; }
    }