* { margin: 0; padding: 0; box-sizing: border-box; }

    body {
      font-family: 'Inter', sans-serif;
      background-color: #0f172a;
      color: #f1f5f9;
      line-height: 1.6;
    }

    header {
      background: #1e293b;
      padding: 1rem 2rem;
      text-align: center;
    }

    header h1 {
      font-size: 2rem;
      margin-bottom: 0.5rem;
    }

    header p {
      font-size: 1rem;
      color: #cbd5e1;
    }

    .container {
      padding: 3rem 2rem;
      max-width: 1200px;
      margin: auto;
    }

    .tool {
      background: #1e293b;
      padding: 2rem;
      border-radius: 10px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.2);
      margin-bottom: 2rem;
    }

    .tool h2 {
      margin-top: 0;
      color: #38bdf8;
    }

    textarea {
      width: 100%;
      height: 150px;
      font-family: monospace;
      padding: 1rem;
      border-radius: 6px;
      border: 1px solid #334155;
      background-color: #333446;
      color: #f1f5f9;
    }

    button {
      background: #38bdf8;
      border: none;
      color: #0f172a;
      padding: 0.5rem 1rem;
      border-radius: 5px;
      cursor: pointer;
      margin-top: 0.5rem;
    }

    button:hover {
      background: #0ea5e9;
    }

    pre {
      background: #0f172a;
      color: #e2e8f0;
      padding: 1rem;
      border-radius: 6px;
      overflow-x: auto;
      border: 1px solid #334155;
    }

    .hidden {
      display: none;
    }