body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background: #f4f6f8;
      margin: 0;
      padding: 40px 20px;
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      max-width: none;
    }

    .form-container {
      max-width: 520px;
      width: 100%;
      background: white;
      border-radius: 12px;
      padding: 40px 44px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
      box-sizing: border-box;
    }

    h1 {
      font-size: 22px;
      margin: 0 0 8px;
      color: #111827;
    }

    label {
      display: block;
      margin-top: 18px;
      font-weight: 600;
      font-size: 14px;
      color: #374151;
    }

    input,
    select,
    textarea {
      width: 100%;
      border-radius: 8px;
      border: 1px solid #d1d5db;
      padding: 10px 12px;
      margin-top: 8px;
      box-sizing: border-box;
      font-size: 14px;
      font-family: inherit;
      color: #111827;
    }

    input:focus,
    select:focus,
    textarea:focus {
      outline: none;
      border-color: #111827;
    }

    button {
      margin-top: 24px;
      padding: 12px 24px;
      background: #0E9F6E;
      color: white;
      border: none;
      cursor: pointer;
      border-radius: 8px;
      font-size: 14px;
      width: 100%;
    }

    button:hover {
      background: #30896b;
    }

    #resultado {
      margin-top: 18px;
      padding: 0;
      font-size: 14px;
      color: #374151;
    }

    .opcional {
      font-weight: normal;
      color: #6b7280;
      font-size: 13px;
    }

    .links-footer {
      margin-top: 28px;
      display: flex;
      gap: 16px;
      justify-content: center;
      border-top: 1px solid #e5e7eb;
      padding-top: 20px;
    }

    .links-footer a {
      color: #2563eb;
      text-decoration: none;
      font-size: 13px;
    }

    .links-footer a:hover {
      text-decoration: underline;
    }