/* RESET / PODSTAWOWE STYLOWANIE */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: Arial, sans-serif;
      background-color: #f2f2f2;
      color: #333;
    }

    /* LAYOUT GŁÓWNY */
    header, nav, main, footer {
      padding: 10px 20px;
      margin: 10px auto;
      max-width: 1200px;
      background-color: #fff;
    }

    /* NAGŁÓWEK */
    header {
      border: 1px solid #ccc;
      text-align: center;
    }
    header h1 {
      margin: 10px 0;
      font-size: 2em;
      color: #444;
    }

    /* NAWIGACJA */
    nav {
      border: 1px solid #ccc;
      margin-top: 0;
      display: flex;
      justify-content: center;
      background: #f9f9f9;
    }
    nav a {
      text-decoration: none;
      color: #333;
      margin: 0 10px;
      font-weight: bold;
      padding: 8px;
      transition: background 0.3s;
    }
    nav a:hover {
      background: #e0e0e0;
    }

    /* GŁÓWNA SEKCJA */
    main {
      border: 1px solid #ccc;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 20px;
      padding: 20px;
    }

    /* KONTENERY W MAIN */
    .form-section,
    .table-section {
      flex: 1 1 450px; /* minimalna szerokość 450px, a reszta elastycznie */
      border: 1px solid #ddd;
      padding: 15px;
      background: #fafafa;
    }
    .form-section h2,
    .table-section h2 {
      margin-bottom: 10px;
      font-size: 1.2em;
      border-bottom: 1px solid #ccc;
    }

    /* FORMULARZ */
    form {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    form label {
      display: flex;
      flex-direction: column;
      font-weight: bold;
    }
    form input[type="date"],
    form input[type="number"],
    form input[type="text"],
    form select {
      padding: 5px;
      width: 100%;
    }
    form button {
      align-self: flex-start;
      padding: 8px 12px;
      background-color: #4CAF50;
      color: #fff;
      border: none;
      cursor: pointer;
      transition: background 0.3s;
      font-size: 1em;
    }
    form button:hover {
      background-color: #45a049;
    }

    /* TABELA */
    table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 10px;
    }
    table th, table td {
      border: 1px solid #ccc;
      padding: 8px;
      text-align: left;
    }
    table th {
      background-color: #eee;
    }

    /* STOPKA */
    footer {
      border: 1px solid #ccc;
      text-align: center;
      margin-top: 0;
      font-size: 0.9em;
      background: #f9f9f9;
    }