:root {
            --primary-blue: #0f4396;
            --text-dark: #2c3e50;
            --text-muted: #7f8c8d;
            --bg-light: #f7f9fc;
            --border-color: #dcdde1;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        .form-container {
            background-color: #ffffff;
            width: 100%;
            max-width: 650px;
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            box-sizing: border-box;
        }

        .form-header {
            text-align: center;
            margin-bottom: 30px;
        }

        .form-header h1 {
            color: var(--primary-blue);
            font-size: 26px;
            font-weight: 700;
            margin: 0 0 10px 0;
        }

        .form-header p {
            color: var(--text-muted);
            font-size: 15px;
            margin: 0;
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }

        /* Na urządzeniach mobilnych układ zmienia się na jedną kolumnę */
        @media (max-width: 600px) {
            .form-grid {
                grid-template-columns: 1fr;
            }
        }

        .form-group {
            display: flex;
            flex-direction: column;
        }

        .form-group.full-width {
            grid-column: span 2;
        }

        @media (max-width: 600px) {
            .form-group.full-width {
                grid-column: span 1;
            }
        }

        label {
            color: var(--text-dark);
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        label span.optional {
            font-size: 12px;
            font-weight: normal;
            color: var(--text-muted);
            display: block;
            margin-top: -2px;
        }

        input[type="text"],
        input[type="email"],
        textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 14px;
            background-color: #fafbfc;
            color: var(--text-dark);
            box-sizing: border-box;
            transition: border-color 0.2s, background-color 0.2s;
        }

        input[type="text"]:focus,
        input[type="email"]:focus,
        textarea:focus {
            outline: none;
            border-color: var(--primary-blue);
            background-color: #ffffff;
        }

        textarea {
            resize: vertical;
            min-height: 120px;
        }

        .checkbox-group {
            display: flex;
            align-items: flex-start;
            margin-top: 10px;
            margin-bottom: 25px;
        }

        .checkbox-group input[type="checkbox"] {
            margin-top: 3px;
            margin-right: 12px;
            cursor: pointer;
            width: 16px;
            height: 16px;
        }

        .checkbox-group label {
            font-size: 12px;
            font-weight: normal;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 0;
            cursor: pointer;
        }

        .submit-btn {
            width: 100%;
            background-color: var(--primary-blue);
            color: #ffffff;
            border: none;
            padding: 16px;
            font-size: 16px;
            font-weight: bold;
            border-radius: 8px;
            cursor: pointer;
            transition: background-color 0.2s;
        }

        .submit-btn:hover {
            background-color: #0b3373;
        }

        .form-footer {
            text-align: center;
            font-size: 11px;
            color: var(--text-muted);
            margin-top: 20px;
            line-height: 1.5;
        }