@media (max-width: 900px) {
    .card-grid--three,
    .form-grid--two,
    .detail-grid,
    .framework-summary {
        grid-template-columns: 1fr;
    }

    .app-header__inner {
        min-height: auto;
        padding-block: var(--space-4);
        align-items: flex-start;
        flex-direction: column;
    }

    .primary-nav {
        flex-wrap: wrap;
        gap: var(--space-4);
    }
}

@media (max-width: 640px) {
    :root {
        --content-padding: 16px;
    }

    .main-content {
        padding-block: var(--space-6);
    }

    .page-header,
    .section-heading,
    .table-toolbar,
    .health-row,
    .app-footer__inner {
        align-items: stretch;
        flex-direction: column;
    }

    .app-version {
        text-align: left;
    }

    .table-toolbar .button,
    .search-field {
        max-width: none;
        width: 100%;
    }

    .wizard-steps {
        grid-template-columns: 1fr;
    }

    .button-row .button,
    .form-actions .button {
        width: 100%;
    }
}


/*
 * Mobile Data Standard
 *
 * At mobile widths, tabular records are presented as stacked data blocks.
 * The shared JavaScript assigns each value its column heading so no table
 * requires horizontal page scrolling.
 */
@media (max-width: 760px) {
    html,
    body,
    .app-shell,
    .main-content,
    .content-container {
        max-width: 100%;
        overflow-x: hidden;
    }

    .table-card {
        overflow: visible;
        background: transparent;
        border: 0;
        box-shadow: none;
    }

    .table-wrap {
        overflow: visible;
    }

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

    .responsive-data-table {
        border-collapse: separate;
    }

    .responsive-data-table thead {
        position: absolute;
        width: 1px;
        height: 1px;
        margin: -1px;
        overflow: hidden;
        clip: rect(0 0 0 0);
        white-space: nowrap;
        border: 0;
    }

    .responsive-data-table tbody {
        display: grid;
        gap: var(--space-4);
    }

    .responsive-data-table tbody tr {
        overflow: hidden;
        border: 1px solid var(--colour-border);
        border-radius: var(--radius-large);
        background: var(--colour-surface);
        box-shadow: var(--shadow-card);
    }

    .responsive-data-table tbody tr:nth-child(even),
    .responsive-data-table tbody tr:hover {
        background: var(--colour-surface);
    }

    .responsive-data-table td {
        display: grid;
        grid-template-columns: minmax(112px, 38%) minmax(0, 1fr);
        gap: var(--space-3);
        align-items: start;
        padding: 12px 16px;
        text-align: left;
        overflow-wrap: anywhere;
        word-break: normal;
    }

    .responsive-data-table td::before {
        content: attr(data-label);
        color: var(--colour-brand-dark);
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.04em;
        line-height: 1.35;
        text-transform: uppercase;
    }

    .responsive-data-table td.table-actions {
        text-align: left;
    }

    .responsive-data-table td.table-actions .button,
    .responsive-data-table td.table-actions form,
    .responsive-data-table td.table-actions .inline-control {
        width: 100%;
    }

    .responsive-data-table td.table-actions .inline-control {
        display: grid;
        gap: var(--space-2);
    }

    .responsive-data-table td.table-actions .button {
        justify-content: center;
    }

    .responsive-data-table tbody tr:last-child td {
        border-bottom: 1px solid var(--colour-border);
    }

    .responsive-data-table tbody tr td:last-child {
        border-bottom: 0;
    }

    .responsive-data-table tfoot {
        margin-top: var(--space-4);
        overflow: hidden;
        border: 1px solid var(--colour-border);
        border-radius: var(--radius-large);
        background: var(--colour-surface-muted);
    }

    .responsive-data-table tfoot tr {
        display: block;
    }

    .responsive-data-table tfoot td,
    .responsive-data-table tfoot th {
        display: grid;
        grid-template-columns: minmax(112px, 38%) minmax(0, 1fr);
        gap: var(--space-3);
        width: 100%;
        padding: 12px 16px;
        text-align: left;
        overflow-wrap: anywhere;
    }

    .page-actions,
    .button-row {
        width: 100%;
    }

    .page-actions .button,
    .button-row .button {
        width: 100%;
        justify-content: center;
    }

    .partner-search,
    .ledger-filter {
        display: grid;
        grid-template-columns: 1fr;
        align-items: stretch;
    }

    .partner-search .button,
    .ledger-filter .button {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 420px) {
    .responsive-data-table td,
    .responsive-data-table tfoot td,
    .responsive-data-table tfoot th {
        grid-template-columns: 1fr;
        gap: 4px;
    }
}


/* Global Mobile Viewport Protection */
@media (max-width: 760px) {
    *, *::before, *::after { box-sizing: border-box; }

    .app-shell, .app-header, .app-header__inner, .primary-nav,
    .main-content, .content-container, .page-header, .section-heading,
    .card, .card-grid, .table-card, .table-wrap,
    main, section, article {
        min-width: 0;
        max-width: 100%;
    }

    .app-header__inner, .primary-nav { width: 100%; }
    .primary-nav { align-items: flex-start; }

    img, svg, canvas, video {
        max-width: 100%;
        height: auto;
    }

    h1, h2, h3, h4, p, a, span, strong, th, td {
        max-width: 100%;
        overflow-wrap: anywhere;
        word-break: normal;
    }

    .table-wrap {
        width: 100%;
        max-width: 100%;
    }

    .table-wrap table:not(.responsive-data-table) {
        width: 100%;
        max-width: 100%;
        table-layout: fixed;
    }

    .table-wrap table:not(.responsive-data-table) th,
    .table-wrap table:not(.responsive-data-table) td {
        min-width: 0;
        white-space: normal;
        overflow-wrap: anywhere;
    }
}

@media (max-width: 420px) {
    .primary-nav { gap: var(--space-3); }
}

/* Shared compatibility for legacy responsive table wrappers. */
.table-responsive {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
}

@media (max-width: 760px) {
    .table-responsive {
        min-width: 0;
        overflow: visible;
    }
}


/*
 * Global Mobile Header Inset
 *
 * The header container owns the protected mobile inset. The navigation must
 * not add a second inset because that unnecessarily reduces its available
 * width and forces links onto extra rows.
 */
@media (max-width: 900px) {
    .app-header__inner {
        width: 100%;
        padding-inline: var(--content-padding);
        box-sizing: border-box;
    }

    .primary-nav {
        width: 100%;
        max-width: 100%;
        padding-inline: 0;
        margin-inline: 0;
        box-sizing: border-box;
    }
}

@media (max-width: 640px) {
    .primary-nav {
        display: flex;
        flex-wrap: wrap;
        align-items: baseline;
        justify-content: start;
        column-gap: var(--space-4);
        row-gap: var(--space-3);
    }

    .primary-nav .nav-form {
        display: block;
        margin: 0;
    }

    .primary-nav a,
    .primary-nav .nav-button {
        white-space: nowrap;
    }
}