/* ================================================================
   UX ENHANCEMENTS — theme toggle, table controls, column chooser
   ================================================================ */
:root {
    --bg-elevated: rgba(23, 28, 39, 0.92);
    --control-bg: var(--surface-2);
    --control-bg-hover: var(--surface-3);
    --row-hover: rgba(63, 239, 180, 0.055);
    --focus-ring: 0 0 0 3px rgba(63, 239, 180, 0.18);
}

:root[data-theme="light"] {
    --bg: #f6f8fb;
    --surface: #ffffff;
    --surface-2: #f1f5f9;
    --surface-3: #e8eef6;
    --bg-elevated: rgba(255, 255, 255, 0.92);
    --border: rgba(15, 23, 42, 0.09);
    --border-mid: rgba(15, 23, 42, 0.16);
    --accent: #087f5b;
    --accent-dim: rgba(8, 127, 91, 0.10);
    --accent-glow: 0 0 0 rgba(8, 127, 91, 0);
    --text: #102033;
    --text-mid: #475569;
    --text-dim: #748094;
    --danger: #dc2626;
    --warn: #b45309;
    --ok: #059669;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.10);
    --row-hover: rgba(8, 127, 91, 0.07);
    --focus-ring: 0 0 0 3px rgba(8, 127, 91, 0.16);
}

:root[data-theme="light"] .bg-grid {
    background-image: linear-gradient(rgba(8, 127, 91, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8, 127, 91, 0.035) 1px, transparent 1px);
}

:root[data-theme="light"] .bg-grid::after {
    background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(8, 127, 91, 0.10) 0%, transparent 60%);
}

:root[data-theme="light"] .app-header,
:root[data-theme="light"] .dataTables_wrapper .dataTables_length,
:root[data-theme="light"] .dataTables_wrapper .dataTables_filter,
:root[data-theme="light"] .dataTables_wrapper .dataTables_info,
:root[data-theme="light"] .dataTables_wrapper .dataTables_paginate {
    background: var(--bg-elevated);
}

:root[data-theme="light"] .app-title,
:root[data-theme="light"] .dna-title,
:root[data-theme="light"] .modal-title {
    color: var(--text);
}

:root[data-theme="light"] #csvTable.stripe tbody tr:nth-child(even) td {
    background: rgba(15, 23, 42, 0.025) !important;
}

:root[data-theme="light"] #csvTable.hover tbody tr:hover td {
    background: var(--row-hover) !important;
}

:root[data-theme="light"] #svgModalBar,
:root[data-theme="light"] #eventModalBar {
    background: #ffffff;
    color: var(--text);
    border-bottom-color: var(--border);
}

:root[data-theme="light"] #dnaPanel {
    background: #ffffff;
}

:root[data-theme="light"] #dnaRefDotBracket,
:root[data-theme="light"] #dnaQueryDotBracket {
    background: #f8fafc;
    color: #047857;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    min-height: 34px;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    border: 1px solid var(--border-mid);
    background: var(--surface-2);
    color: var(--text-mid);
    font-family: 'Syne', system-ui, sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.theme-toggle:hover {
    background: var(--surface-3);
    color: var(--text);
    border-color: rgba(63, 239, 180, 0.35);
    transform: translateY(-1px);
}

.theme-toggle:focus-visible,
.settings-toggle:focus-visible,
.btn-primary:focus-visible,
.btn-ghost:focus-visible,
.col-config-btn:focus-visible,
.file-btn:focus-visible,
.ctrl-input:focus-visible,
.ctrl-select:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.theme-toggle-icon {
    width: 1rem;
    text-align: center;
    color: var(--accent);
}



.dataTables_wrapper table.dataTable {
    margin: 0 !important;
}

.dt-toolbar,
.dt-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    background: var(--surface-2);
    border-color: var(--border);
}

.dt-toolbar {
    border-bottom: 1px solid var(--border);
}

.dt-footer {
    position: relative;
    flex-shrink: 0;
    z-index: 4;
    border-top: 1px solid var(--border);
    box-shadow: 0 -10px 24px rgba(0, 0, 0, 0.12);
}

.dt-toolbar .dataTables_length,
.dt-toolbar .dataTables_info,
.dt-footer .dataTables_info,
.dt-footer .dataTables_paginate {
    background: transparent !important;
    padding: 0.55rem 0.85rem !important;
}

.dt-footer-right {
    margin-left: auto;
}

.dataTables_wrapper .dataTables_paginate {
    float: none !important;
    text-align: right !important;
}

.dataTables_wrapper .dataTables_info {
    float: none !important;
    white-space: nowrap;
}

.dataTables_wrapper .dataTables_length {
    float: none !important;
}


#csvTable thead th {
    position: relative !important;
}



/*#csvTable tbody td.cluster-cell {*/
/*    position: sticky;*/
/*    left: 0;*/
/*    z-index: 2;*/
/*    box-shadow: 8px 0 18px rgba(0, 0, 0, 0.14);*/
/*}*/

/*#csvTable thead th:first-child {*/
/*    left: 0;*/
/*    z-index: 5;*/
/*}*/


.cluster-action-btn {
    min-height: 24px;
}

.col-config-btn {
    align-self: flex-end;
    position: sticky;
    top: 76px;
    z-index: 20;
    box-shadow: var(--shadow);
}

.col-panel {
    position: sticky;
    top: 72px;
    z-index: 30;
    box-shadow: var(--shadow);
    border-color: var(--border-mid);
}

.col-panel.hidden {
    display: none;
}

.col-panel-header {
    align-items: flex-start;
}

.panel-subtitle {
    color: var(--text-dim);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    margin-top: 0.25rem;
}

.column-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--surface-2);
}

.column-search {
    flex: 1;
    min-width: 180px;
}

.column-toolbar-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.checkbox-grid {
    max-height: min(38vh, 360px);
    overflow: auto;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
}

.checkbox-grid label {
    padding: 0.45rem 0.55rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface-2);
}

.checkbox-grid label:hover {
    border-color: var(--border-mid);
    background: var(--surface-3);
}

.checkbox-grid label.is-required {
    opacity: 0.9;
    cursor: not-allowed;
}

.checkbox-grid label.is-hidden-by-search {
    display: none;
}

.checkbox-grid .column-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.checkbox-grid .required-pill {
    margin-left: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.58rem;
    color: var(--accent);
    background: var(--accent-dim);
    border-radius: 999px;
    padding: 0.08rem 0.35rem;
}

@media (max-width: 900px) {
    .header-actions {
        width: 100%;
        justify-content: space-between;
        order: 3;
    }

    .stage-nav {
        order: 0;
        width: auto;
        overflow-x: auto;
        justify-content: flex-start;
    }

    .theme-toggle-text {
        display: none;
    }

    .dt-toolbar, .dt-footer, .column-toolbar {
        align-items: stretch;
        flex-direction: column;
    }

    .dt-footer-right, .dt-footer-left {
        width: 100%;
    }

    .dataTables_wrapper .dataTables_paginate {
        text-align: center !important;
    }

    .checkbox-grid {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}

/* DataTables' own scroll body keeps the header/footer visible while table rows scroll. */
.dataTables_scroll {
    min-height: 0;
}



.dataTables_scrollHead {
    background: var(--surface-2);
}


/* Horizontal scroll affordance */
.dt-toolbar-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: .45rem;
    flex-wrap: wrap;
}

.dt-scroll-hint {
    display: none;
    align-items: center;
    gap: .4rem;
    padding: .3rem .6rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--accent-dim);
    color: var(--text-mid);
    font-family: 'JetBrains Mono', monospace;
    font-size: .66rem;
    white-space: nowrap;
}

.dt-scroll-hint.is-visible {
    display: inline-flex;
}

.dt-scroll-controls {
    display: none;
    align-items: center;
    gap: .25rem;
}

.dt-scroll-controls.is-visible {
    display: inline-flex;
}

.dt-scroll-btn {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    border: 1px solid var(--border-mid);
    background: var(--surface-2);
    color: var(--text-mid);
    cursor: pointer;
}

.dt-scroll-btn:hover:not(:disabled) {
    background: var(--surface-3);
    color: var(--accent);
}

.dt-scroll-btn:disabled {
    opacity: .38;
    cursor: not-allowed;
}

.dt-scroll-shell {
    position: relative;
    min-height: 0;
}

.dt-scroll-shell::before, .dt-scroll-shell::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 16px;
    width: 34px;
    z-index: 8;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition);
}

.dt-scroll-shell::before {
    left: 0;
    background: linear-gradient(90deg, var(--surface), transparent);
}

.dt-scroll-shell::after {
    right: 0;
    background: linear-gradient(270deg, var(--surface), transparent);
}

.dt-scroll-shell.can-scroll-left::before, .dt-scroll-shell.can-scroll-right::after {
    opacity: 1;
}

.dataTables_scrollBody {
    overflow-x: scroll !important;
    overflow-y: auto !important;
    scrollbar-gutter: stable;
    scrollbar-width: auto;
    background: var(--surface);
    scrollbar-color: var(--surface-3) transparent;

    padding-bottom: 12px !important;
    box-sizing: border-box;
}

.dataTables_scrollBody::-webkit-scrollbar {
    height: 14px;
    width: 12px;
}

.dataTables_scrollBody::-webkit-scrollbar-track {
    background: var(--surface-2);
    border-radius: 999px;
}

.dataTables_scrollBody::-webkit-scrollbar-thumb {
    background: var(--border-mid);
    border: 3px solid var(--surface-2);
    border-radius: 999px;
}

.dataTables_scrollBody::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}


.dt-x-thumb:hover,
.dt-x-thumb:focus-visible,
.dt-x-thumb.is-dragging {
    outline: none;
    filter: brightness(1.15);
    cursor: grabbing;
}

.dt-scroll-btn {
    min-width: 34px !important;
    height: 34px !important;
    font-size: 1rem !important;
}

.dt-scroll-hint.is-visible,
.dt-scroll-controls.is-visible {
    display: inline-flex !important;
}

.dt-footer {
    display: flex !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    gap: 0.35rem 0.75rem !important;
    padding: 0.45rem 0.85rem 0.65rem !important;
}

.dt-footer .dt-x-scrollbar {
    order: 0;
    flex: 0 0 100%;
}

.dt-footer-left,
.dt-footer-right {
    order: 1;
}

.dt-footer-right {
    margin-left: auto;
}

.dt-x-scrollbar {
    display: none;
    width: 100% !important;
    box-sizing: border-box;
    margin: 0 0 0.45rem 0 !important;
    height: 42px !important;
    padding: 9px 13px !important;
    border: 1px solid var(--border-mid);
    border-radius: 14px !important;
    background: color-mix(in srgb, var(--surface-2) 86%, var(--accent) 14%);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03), 0 6px 14px rgba(0, 0, 0, 0.12);
}

.dt-x-scrollbar.is-visible {
    display: block !important;
}

.dt-x-rail {
    position: relative;
    width: 100%;
    height: 22px !important;
    border-radius: 999px;
    background: var(--surface-3);
    cursor: pointer;
    overflow: hidden;
    border: 1px solid var(--border-mid);
}

.dt-x-rail::before {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    top: 50%;
    height: 4px;
    transform: translateY(-50%);
    border-radius: 999px;
    background: var(--border-mid);
}

.dt-x-thumb {
    position: absolute;
    top: 2px !important;
    left: 0;
    height: 8px !important;
    min-width: 84px !important;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent), #60a5fa);
    box-shadow: 0 0 14px rgba(63, 239, 180, 0.36);
    cursor: grab;
    touch-action: none;
    will-change: transform, width;
}

.dt-x-thumb:hover,
.dt-x-thumb:focus-visible,
.dt-x-thumb.is-dragging {
    outline: none;
    filter: brightness(1.18);
    cursor: grabbing;
}

.dt-scroll-btn {
    min-width: 34px !important;
    height: 34px !important;
    font-size: 1rem !important;
}
/* ── Excel-like DataTable column resizing ───────────────────── */

#csvTable thead th,
.dataTables_scrollHead table thead th {
    position: relative !important;
}

.dataTables_scrollHead table thead th.dt-resizable-column {
    overflow: visible !important;
}

.dt-col-resize-handle {
    position: absolute;
    top: 0;
    right: -4px;
    width: 9px;
    height: 100%;
    z-index: 20;
    cursor: col-resize;
    user-select: none;
    touch-action: none;
}

.dt-col-resize-handle::after {
    content: "";
    position: absolute;
    top: 18%;
    bottom: 18%;
    left: 4px;
    width: 1px;
    border-radius: 999px;
    background: transparent;
    transition:
        background var(--transition),
        box-shadow var(--transition);
}

.dataTables_scrollHead table thead th.dt-resizable-column:hover
    .dt-col-resize-handle::after,
.dt-col-resize-handle:hover::after,
body.is-resizing-table-column .dt-col-resize-handle::after {
    background: var(--accent);
    box-shadow: 0 0 10px color-mix(in srgb, var(--accent) 60%, transparent);
}

body.is-resizing-table-column {
    cursor: col-resize !important;
    user-select: none !important;
}

body.is-resizing-table-column * {
    cursor: col-resize !important;
    user-select: none !important;
}