* { box-sizing: border-box; }

        html, body {
            margin: 0;
            padding: 0;
            max-width: 100%;
            overflow-x: hidden;
            font-family: Arial, Helvetica, sans-serif;
            background: #efefef;
            color: #222;
        }

        #wrapper {
            width: 100%;
            background: #fff;
        }

        .page-shell {
            width: 100%;
            max-width: 1180px;
            margin: 0 auto;
            padding: 24px 16px 40px;
        }

        .admin-card {
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 8px 24px rgba(0,0,0,0.08);
            padding: 24px;
        }

        .section-title {
            margin: 0 0 24px;
            text-align: center;
        }

        .block-title {
            margin: 0 0 14px;
            font-size: 1.35rem;
            color: #222;
        }

        .info-text {
            margin: 0 0 18px;
            color: #555;
        }

        .form-table,
        .result-table {
            width: 100%;
            border-collapse: collapse;
            margin: 0;
        }

        .form-table td,
        .form-table th,
        .result-table td,
        .result-table th {
            padding: 10px 8px;
            vertical-align: middle;
        }

        .form-table td:first-child {
            width: 240px;
            font-weight: bold;
            white-space: nowrap;
        }

        select,
        input,
        textarea,
        button {
            font: inherit;
        }

        select {
            width: 100%;
            max-width: 420px;
            min-height: 42px;
            padding: 8px 12px;
            border: 1px solid #bbb;
            border-radius: 8px;
            background: #fff;
        }

        .textareo {
            width: 100%;
            max-width: 480px;
            min-height: 80px;
            padding: 12px 20px;
            border: 1px solid #ccc;
            border-radius: 8px;
            background-color: #fff;
        }

        .new_layout {
            border-radius: 10px;
        }

        #gestion_repas {
            width: 100%;
        }

        #gestion_paiement {
            width: 100%;
            min-height: 40px;
            margin-top: 10px;
        }

        .spacer {
            height: 18px;
        }

        /* tableau éventuellement injecté par AJAX */
        #gestion_paiement table {
            width: 100% !important;
            max-width: 100%;
            border-collapse: collapse;
        }

        #gestion_paiement td,
        #gestion_paiement th {
            padding: 8px;
            text-align: center;
            vertical-align: middle;
            border: 1px solid #ddd;
        }

        #gestion_paiement select {
            min-width: 220px;
        }

        .centre-btn {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .centre-btn select {
            padding: 8px 12px;
            font-size: 16px;
            min-width: 220px;
            border-radius: 6px;
            border: 1px solid #aaa;
            background-color: #f9f9f9;
            cursor: pointer;
        }

        footer {
            margin-top: 30px;
        }

        @media (max-width: 768px) {
            .page-shell {
                padding: 16px 10px 28px;
            }

            .admin-card {
                padding: 16px;
                border-radius: 10px;
            }

            .block-title {
                font-size: 1.15rem;
                text-align: center;
            }

            .form-table,
            .form-table tbody,
            .form-table tr,
            .form-table td {
                display: block;
                width: 100%;
            }

            .form-table tr {
                margin-bottom: 12px;
            }

            .form-table td:first-child {
                width: 100%;
                padding-bottom: 4px;
            }

            select {
                max-width: 100%;
            }

            #gestion_paiement {
                overflow-x: auto;
            }

            #gestion_paiement table,
            #gestion_paiement tbody,
            #gestion_paiement tr,
            #gestion_paiement td,
            #gestion_paiement th {
                white-space: nowrap;
            }
        }