/* ============================================================
   Design tokens
   ============================================================ */
:root {
    /* Dark mode (default) */
    --bg:            #0d1117;
    --surface:       #161b22;
    --surface-raised:#21262d;
    --border:        #30363d;
    --text:          #e6edf3;
    --text-muted:    #8b949e;
    --accent:        #388bfd;
    --accent-hover:  #58a6ff;
    --accent-fg:     #ffffff;
    --danger:        #f85149;
    --success:       #3fb950;
    --shadow:        0 1px 3px rgba(0,0,0,0.4), 0 4px 12px rgba(0,0,0,0.3);
    --shadow-sm:     0 1px 2px rgba(0,0,0,0.3);
    --radius:        8px;
    --radius-sm:     6px;
    --radius-pill:   999px;
    --icon-invert:   1;
    --transition:    0.15s ease;
}

.light-mode {
    --bg:            #f6f8fa;
    --surface:       #ffffff;
    --surface-raised:#f6f8fa;
    --border:        #d0d7de;
    --text:          #1f2328;
    --text-muted:    #656d76;
    --accent:        #0969da;
    --accent-hover:  #0550ae;
    --accent-fg:     #ffffff;
    --shadow:        0 1px 3px rgba(31,35,40,0.1), 0 4px 12px rgba(31,35,40,0.07);
    --shadow-sm:     0 1px 2px rgba(31,35,40,0.08);
    --icon-invert:   0;
}

/* ============================================================
   Reset & base
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
    background-color: var(--bg);
    color: var(--text);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ============================================================
   Header
   ============================================================ */
header {
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    height: 56px;
}

header h1 {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 0;
    color: var(--text);
}

/* ============================================================
   Theme toggle button
   ============================================================ */
.theme-toggle {
    position: absolute;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface-raised);
    color: var(--text-muted);
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
    padding: 0;
}

.theme-toggle:hover {
    background: var(--surface-raised);
    border-color: var(--accent);
    color: var(--text);
}

.theme-toggle svg {
    width: 16px;
    height: 16px;
    display: block;
}

/* In dark mode show sun (switch to light); in light mode show moon (switch to dark) */
body:not(.light-mode) .icon-moon { display: none; }
body.light-mode .icon-sun        { display: none; }

/* ============================================================
   Main content area
   ============================================================ */
main {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px 24px 0;
}

/* ============================================================
   Filter section
   ============================================================ */
.filters {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.filter-section {
    margin-bottom: 12px;
}

.filter-section:last-child {
    margin-bottom: 0;
}

.filter-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-align: center;
}

.chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    width: 100%;
    justify-content: center;
}

/* Hide real checkbox, style label as chip */
.chip-group label {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border);
    background: var(--surface-raised);
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
    user-select: none;
    margin: 0;
}

.chip-group label:hover {
    border-color: var(--accent);
    color: var(--text);
}

.chip-group label:has(input:checked) {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-fg);
}

.chip-group label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

/* Reset button row */
.filter-actions {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

#resetFilters {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}

#resetFilters:hover {
    background: var(--danger);
    border-color: var(--danger);
    color: #fff;
}

/* ============================================================
   Table wrapper
   ============================================================ */
.table-container {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 700px;
}

/* ============================================================
   Table header
   ============================================================ */
thead {
    /* sticky thead requires a non-overflow scroll ancestor;
       skipped here since table-container uses overflow-x: auto */
}

th {
    background-color: var(--surface-raised);
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 10px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

th.sortable {
    cursor: pointer;
}

th.sortable:hover {
    color: var(--text);
    background-color: var(--surface-raised);
}

th.sortable::after {
    content: ' ↕';
    font-size: 10px;
    opacity: 0.4;
}

/* Column widths */
th:nth-child(1) { width: 18%; }   /* Mitigation Strategy */
th:nth-child(2) { width: 12%; }   /* Control Reference */
th:nth-child(3) { width: 52%; }   /* Control */
th:nth-child(4),
th:nth-child(5),
th:nth-child(6) { width: 6%; text-align: center; } /* ML1/2/3 */

/* ============================================================
   Table body
   ============================================================ */
td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
    vertical-align: top;
}

td:nth-child(4),
td:nth-child(5),
td:nth-child(6) {
    text-align: center;
    white-space: nowrap;
    font-size: 12px;
    color: var(--text-muted);
}

/* TRUE badge */
td:nth-child(4):not(:empty),
td:nth-child(5):not(:empty),
td:nth-child(6):not(:empty) {
    color: var(--success);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.03em;
}

tbody tr:last-child td {
    border-bottom: none;
}

tbody tr:hover td {
    background-color: var(--surface-raised);
}

tbody tr.active td {
    background-color: var(--surface-raised);
}

/* Control column */
td.control-column {
    cursor: pointer;
    white-space: normal;
    word-break: break-word;
    line-height: 1.5;
}

td.control-column:hover {
    color: var(--accent);
}

/* ============================================================
   Methodology expand row
   ============================================================ */
.methodology-row {
    background-color: var(--surface) !important;
}

.methodology-row.hidden {
    display: none;
}

.methodology-row td {
    padding: 0;
    border-bottom: 1px solid var(--border);
}

.methodology-content {
    padding: 14px 20px 14px 36px;
    border-left: 3px solid var(--accent);
    margin: 8px 16px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background-color: var(--surface-raised);
}

.methodology-content strong {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent);
    margin-bottom: 8px;
}

.methodology-content p {
    margin: 0;
    line-height: 1.6;
    color: var(--text);
    font-size: 13px;
}

/* ============================================================
   Popup (methodology modal — legacy)
   ============================================================ */
#methodologyPopup {
    position: fixed;
    inset: 0;
    background-color: rgba(0,0,0,0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.popup-content {
    background-color: var(--surface);
    color: var(--text);
    padding: 24px;
    border-radius: var(--radius);
    max-width: 640px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.popup-content h3 {
    margin: 0 0 16px;
    font-size: 16px;
    font-weight: 600;
}

.popup-content button {
    margin-top: 16px;
    padding: 6px 16px;
    background-color: var(--accent);
    color: var(--accent-fg);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: background var(--transition);
}

.popup-content button:hover {
    background-color: var(--accent-hover);
}

/* ============================================================
   Footer
   ============================================================ */
footer.author-info {
    text-align: center;
    padding: 20px 24px;
    color: var(--text-muted);
    font-size: 12px;
    border-top: 1px solid var(--border);
    margin-top: 8px;
}

footer.author-info p {
    margin: 0 0 8px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.social-icon {
    width: 16px;
    height: 16px;
    filter: invert(var(--icon-invert));
    opacity: 0.5;
    transition: opacity var(--transition);
    display: block;
}

.social-icon:hover {
    opacity: 1;
}

/* ============================================================
   Focus styles (accessibility)
   ============================================================ */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ============================================================
   Filter toggle button (mobile only — hidden on desktop)
   ============================================================ */
.filter-toggle {
    display: none;
}

/* ============================================================
   Responsive — tablet
   ============================================================ */
@media (max-width: 768px) {
    header {
        padding: 0 16px;
    }

    main {
        padding: 16px 12px 0;
    }

    .filters {
        padding: 0;
        overflow: hidden;
    }

    /* Toggle button visible on mobile */
    .filter-toggle {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: 14px 16px;
        background: transparent;
        border: none;
        color: var(--text);
        font-size: 14px;
        font-weight: 600;
        cursor: pointer;
        text-align: left;
    }

    .filter-toggle-label {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .filter-toggle-count {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 18px;
        height: 18px;
        padding: 0 5px;
        border-radius: var(--radius-pill);
        background: var(--accent);
        color: var(--accent-fg);
        font-size: 11px;
        font-weight: 700;
        /* hidden when count is 0 */
    }

    .filter-toggle-count:empty,
    .filter-toggle-count[data-count="0"] {
        display: none;
    }

    .filter-chevron {
        width: 16px;
        height: 16px;
        color: var(--text-muted);
        transition: transform var(--transition);
        flex-shrink: 0;
    }

    .filters.open .filter-chevron {
        transform: rotate(180deg);
    }

    /* Collapsible body */
    .filter-body {
        display: none;
        padding: 0 16px 14px;
        border-top: 1px solid var(--border);
    }

    .filters.open .filter-body {
        display: block;
    }

    .filter-body .filter-section {
        margin-top: 12px;
    }

    .filter-actions {
        margin-top: 12px;
    }
}

/* ============================================================
   Responsive — mobile card layout
   ============================================================ */
@media (max-width: 768px) {
    /* Remove side borders on table container so cards go edge-to-edge */
    .table-container {
        border-left: none;
        border-right: none;
        border-radius: 0;
        margin-left: -12px;
        margin-right: -12px;
        overflow-x: hidden;
    }

    /* Override desktop min-width so card layout isn't constrained */
    #resultsTable {
        min-width: 0;
        width: 100%;
    }

    /* Hide column headers */
    #resultsTable thead {
        display: none;
    }

    /* Each data row becomes a card */
    #resultsTable tbody tr:not(.methodology-row) {
        display: block;
        position: relative;
        padding: 12px 16px;
        border-bottom: 1px solid var(--border);
    }

    #resultsTable tbody tr:not(.methodology-row):last-of-type {
        border-bottom: none;
    }

    /* All cells become blocks, no borders */
    #resultsTable tbody tr:not(.methodology-row) td {
        display: block;
        border: none;
        padding: 0;
        text-align: left;
        white-space: normal;
        word-break: break-word;
        overflow-wrap: break-word;
        max-width: 100%;
    }

    /* Strategy badge via ::before on the row */
    #resultsTable tbody tr:not(.methodology-row)::before {
        content: attr(data-strategy);
        display: inline-block;
        font-size: 11px;
        font-weight: 600;
        padding: 2px 9px;
        border-radius: var(--radius-pill);
        background: var(--surface-raised);
        color: var(--text-muted);
        border: 1px solid var(--border);
        margin-bottom: 8px;
        letter-spacing: 0.02em;
    }

    /* Hide strategy column td (shown as badge above) */
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(1) {
        display: none;
    }

    /* Control Reference — small monospace label */
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(2) {
        font-size: 11px;
        font-weight: 700;
        color: var(--text-muted);
        letter-spacing: 0.06em;
        text-transform: uppercase;
        margin-bottom: 4px;
    }

    /* Control text — main readable content */
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(3) {
        font-size: 14px;
        line-height: 1.5;
        color: var(--text);
        margin-bottom: 10px;
        cursor: pointer;
    }

    #resultsTable tbody tr:not(.methodology-row) td:nth-child(3):hover {
        color: var(--accent);
    }

    /* ML level badges — inline row at the bottom */
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(4),
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(5),
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(6) {
        display: inline-flex;
        align-items: center;
        margin-right: 6px;
        padding: 2px 9px;
        border-radius: var(--radius-pill);
        background: rgba(63, 185, 80, 0.12);
        border: 1px solid rgba(63, 185, 80, 0.3);
        color: transparent; /* hide "TRUE" text */
        font-size: 0;
    }

    #resultsTable tbody tr:not(.methodology-row) td:nth-child(4)::before,
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(5)::before,
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(6)::before {
        font-size: 11px;
        font-weight: 700;
        color: var(--success);
        letter-spacing: 0.03em;
    }

    #resultsTable tbody tr:not(.methodology-row) td:nth-child(4)::before { content: "ML1"; }
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(5)::before { content: "ML2"; }
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(6)::before { content: "ML3"; }

    /* Hide empty ML cells (no badge when not applicable) */
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(4):empty,
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(5):empty,
    #resultsTable tbody tr:not(.methodology-row) td:nth-child(6):empty {
        display: none;
    }

    /* Methodology expand row — full-width block (only when not hidden) */
    #resultsTable tbody .methodology-row:not(.hidden) {
        display: block;
    }

    #resultsTable tbody .methodology-row td {
        display: block;
        border: none;
        padding: 0;
    }

    .methodology-content {
        margin: 4px 12px 8px;
        max-width: 100%;
        word-break: break-word;
        overflow-wrap: break-word;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 15px;
    }

    .chip-group label {
        font-size: 12px;
        padding: 3px 10px;
    }
}