#heatmap-tab-content {
        position: relative;
        min-height: 600px;
    }

    #heatmap-wrapper {
        width: 100%;
    }

    /* Heatmap controls bar */
    #heatmap-controls {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 10px;
        background-color: var(--bg-light-alt);
        padding: var(--space-2-5);
        border-radius: var(--radius-md);
        border: 1px solid var(--border-light);
    }

    /* Legend line - italic, muted */
    #heatmap-legend-text {
        font-size: 11px;
        color: var(--text-muted);
        font-style: italic;
        margin-bottom: 12px;
    }

    /* Heatmap container - gap-based grid effect via background */
    #yearly-heatmap-plot {
        width: 100%;
        min-height: 600px;
        background: var(--border-color);
        border-radius: var(--radius-md);
    }

    /* Dark mode heatmap container */
    [data-theme="dark"] #yearly-heatmap-plot {
        background: rgba(255,255,255,0.06);
    }

    /* Fixed Loader Styling with Progress Bar */
    #heatmap-loading {
        display: none;
        position: absolute;
        top: 150px;
        left: 50%;
        transform: translateX(-50%);
        background: var(--bg-secondary);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-md, 0 2px 8px rgba(0,0,0,0.12));
        padding: 20px 40px;
        z-index: var(--z-dropdown);
        text-align: center;
        color: var(--text-primary);
        font-weight: var(--font-weight-bold);
        min-width: 300px;
    }

    /* Dark mode loader */
    [data-theme="dark"] #heatmap-loading {
        background: var(--bg-tertiary);
        border-color: rgba(122,175,192,0.2);
        box-shadow: 0 4px 16px rgba(0,0,0,0.4);
    }

    /* ============================================
       PLOTLY HEATMAP OVERRIDES
       The heatmap uses Plotly.js which renders to canvas.
       These styles affect the surrounding container and
       any HTML elements Plotly generates for labels.
       ============================================ */

    /* Y-axis (object name column) - Plotly generates SVG text */
    #yearly-heatmap-plot .ytick text {
        font-family: 'DM Sans', sans-serif !important;
        font-size: 11px !important;
        fill: var(--text-secondary) !important;
    }

    /* X-axis (date/week headers) - Plotly generates SVG text */
    #yearly-heatmap-plot .xtick text {
        font-family: var(--font-mono, 'DM Mono', monospace) !important;
        font-size: 9px !important;
        fill: var(--text-muted) !important;
        letter-spacing: 0.03em !important;
        text-align: center !important;
    }

    /* Hover tooltip - Plotly's built-in tooltip */
    .hovertext {
        font-family: 'DM Sans', sans-serif !important;
    }

    .hovertext path {
        fill: var(--bg-secondary) !important;
        stroke: var(--border-color) !important;
        stroke-width: 1px !important;
    }

    [data-theme="dark"] .hovertext path {
        fill: var(--bg-tertiary) !important;
        stroke: rgba(122,175,192,0.2) !important;
    }

    .hovertext text {
        fill: var(--text-primary) !important;
        font-size: 12px !important;
    }