/* sessions-matrix-cells.css — Data rows, cell types, skeleton, and state styles */

/* ── Data rows ───────────────────────────────────────────────── */
.matrix-row {
    display: contents;
    cursor: pointer;
}
.matrix-row > * {
    height: 60px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-subtle, #f0f0f0);
    box-sizing: border-box;
    background: var(--bg-surface, #fff);
    transition: background var(--transition-fast, 120ms);
}
.matrix-row:hover > * { background: #fafbfd; }
.matrix-row.is-active > * { background: var(--color-primary-50, #eff6ff); }
.matrix-row--absent > * { background: var(--color-neutral-50, #f9fafb); }
.matrix-row--absent:hover > * { background: var(--color-neutral-100, #f3f4f6); }
.matrix-row.is-active > .matrix-cell-date {
    box-shadow: inset 3px 0 0 var(--color-primary-700, #1d4ed8);
}
[data-is-critical="true"] > .matrix-cell-date {
    box-shadow: inset 3px 0 0 var(--color-danger, #dc2626);
}
.matrix-row.is-active[data-is-critical="true"] > .matrix-cell-date {
    box-shadow: inset 3px 0 0 var(--color-danger, #dc2626);
}

/* ── Date cell ───────────────────────────────────────────────── */
.matrix-cell-date {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 0 12px 0 16px;
    gap: 1px;
}
.matrix-date-main {
    font-size: 13px;
    font-weight: var(--weight-bold, 700);
    color: var(--fg-primary, #111827);
    letter-spacing: var(--tracking-normal, 0);
}
.matrix-date-dow {
    font-size: 10.5px;
    font-weight: var(--weight-medium, 500);
    color: var(--fg-tertiary, #9ca3af);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.matrix-absent-badge {
    font-size: 9px;
    font-weight: var(--weight-bold, 700);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-neutral-500, #6b7280);
    background: var(--color-neutral-100, #f3f4f6);
    border-radius: var(--radius-full, 9999px);
    padding: 1px 6px;
    line-height: 1.4;
}

/* ── Score cells ─────────────────────────────────────────────── */
.matrix-cell-score {
    justify-content: center;
    padding: 0;
    flex-shrink: 0;
}
.matrix-cell-score.score-start { border-left: 1px solid var(--border-subtle, #f0f0f0); }
.matrix-cell-score.score-end   { border-right: 1px solid var(--border-subtle, #f0f0f0); }

/* ── Score chip ──────────────────────────────────────────────── */
.matrix-chip {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: var(--weight-bold, 700);
    position: relative;
    flex-shrink: 0;
}
.matrix-chip.score--critical { background: #b91c1c; color: #fff; }
.matrix-chip.score--red      { background: #fecaca; color: #991b1b; }
.matrix-chip.score--amber    { background: var(--color-warning-light, #fef9c3); color: #92400e; }
.matrix-chip.score--green    { background: var(--color-success-light, #dcfce7); color: #15803d; }
.matrix-chip.score--neutral  { background: var(--color-neutral-100, #f3f4f6); color: var(--color-neutral-300, #d1d5db); font-weight: var(--weight-medium, 500); }
.matrix-chip.score--bool-true  { background: var(--color-success-light, #dcfce7); color: #15803d; }
.matrix-chip.score--bool-false { background: #fecaca; color: #991b1b; }

/* Pulsing circular badge for score=1 */
.matrix-chip.score--critical::after {
    content: '!';
    position: absolute;
    top: -3px;
    right: -3px;
    width: 12px;
    height: 12px;
    border-radius: 999px;
    background: var(--color-danger, #dc2626);
    color: #fff;
    font-size: 9px;
    font-weight: var(--weight-bold, 700);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px solid #fff;
    animation: matrix-badge-pulse 1.8s ease-in-out infinite;
}
@keyframes matrix-badge-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.55); }
    50%       { box-shadow: 0 0 0 5px rgba(220, 38, 38, 0); }
}
@media (prefers-reduced-motion: reduce) {
    .matrix-chip.score--critical::after {
        animation: none;
        box-shadow: 0 0 0 1.5px rgba(220,38,38,0.6);
    }
}

/* ── Topics cell ─────────────────────────────────────────────── */
.matrix-cell-topics {
    padding: 0 12px;
    min-width: 0;
}
.cell-topics-wrap {
    display: flex;
    flex-direction: column;
    min-width: 0;
    width: 100%;
    gap: 2px;
}
.topic-main {
    font-size: 13px;
    font-weight: var(--weight-semibold, 600);
    color: var(--fg-primary, #111827);
    letter-spacing: var(--tracking-normal, 0);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.topic-sub {
    font-size: 11.5px;
    color: var(--fg-tertiary, #9ca3af);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ── Observations cell ───────────────────────────────────────── */
.matrix-cell-obs {
    padding: 0 12px;
    min-width: 0;
    align-items: center;
}
.obs-wrap {
    display: flex;
    flex-direction: column;
    min-width: 0;
    width: 100%;
    gap: 2px;
}
.obs-label {
    font-size: 10px;
    font-weight: var(--weight-bold, 700);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--fg-tertiary, #9ca3af);
}
.obs-label--critical { color: var(--color-danger, #dc2626); }
.obs-text {
    font-size: 13px;
    color: var(--fg-secondary, #374151);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}
.obs-empty {
    font-size: 13px;
    color: var(--fg-tertiary, #9ca3af);
}

/* ── Chevron cell ────────────────────────────────────────────── */
.matrix-cell-chev {
    justify-content: center;
    padding: 0;
    color: var(--color-neutral-300, #d1d5db);
    flex-shrink: 0;
}
.matrix-row:hover > .matrix-cell-chev { color: var(--fg-tertiary, #9ca3af); }
.matrix-row.is-active > .matrix-cell-chev { color: var(--color-primary-600, #2563eb); }

/* ── Skeleton ────────────────────────────────────────────────── */
.matrix-skeleton-row > * {
    height: 60px;
    border-bottom: 1px solid var(--border-subtle, #f0f0f0);
}
.matrix-skeleton-cell {
    margin: 18px 8px;
    height: 24px;
    background: linear-gradient(90deg, var(--bg-muted, #f3f4f6) 25%, var(--bg-hover, #e5e7eb) 50%, var(--bg-muted, #f3f4f6) 75%);
    background-size: 200% 100%;
    animation: matrix-shimmer 1.5s infinite;
    border-radius: 4px;
}
@keyframes matrix-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}
@media (prefers-reduced-motion: reduce) {
    .matrix-skeleton-cell { animation: none; background: var(--bg-muted, #f3f4f6); }
}

/* ── Load more row ───────────────────────────────────────────── */
.matrix-load-more {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    padding: 14px 0 18px;
    border-top: 1px dashed var(--color-neutral-200, #e5e7eb);
    background: var(--bg-surface, #fff);
}
.matrix-load-more-btn {
    font-size: 13px;
    font-weight: var(--weight-semibold, 600);
    color: var(--color-primary-600, #2563eb);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}
.matrix-load-more-btn:hover { text-decoration: underline; }

/* ── Empty / Error states ────────────────────────────────────── */
.matrix-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    gap: 12px;
    color: var(--fg-tertiary, #9ca3af);
    font-size: 14px;
    text-align: center;
}
.matrix-error-banner {
    background: var(--color-danger-light, #fee2e2);
    border: 1px solid var(--color-danger-300, #fca5a5);
    color: var(--color-danger-dark, #991b1b);
    border-radius: 6px;
    padding: 10px 16px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 16px 24px;
}

/* ── aria-live region (visually hidden) ──────────────────────── */
.matrix-live-region {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}