/* Entropy – Two-Chamber Statistical Mechanics Lab (dark-mode lab, Courier New, max-width 800px) */
#content_sim .entropy-lab {
    padding: 16px 0;
    max-width: 800px;
    background: #0a0a0c;
    color: #ccc;
    font-family: 'Courier New', monospace;
}

#content_sim .entropy-container {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    align-items: flex-start;
}

#content_sim .entropy-controls {
    flex: 0 0 220px;
    margin-left: 20px;
    border-right: 1px solid #333;
    padding-right: 20px;
}

#content_sim .entropy-controls h2 {
    margin: 0 0 12px 0;
    font-size: 1.1em;
    color: #ddd;
    font-family: 'Courier New', monospace;
}

#content_sim .entropy-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

#content_sim .entropy-step-buttons {
    display: flex;
    flex-wrap: nowrap;
    gap: 6px;
    align-items: center;
}

#content_sim .entropy-step-buttons button {
    white-space: nowrap;
    flex-shrink: 0;
}

#content_sim .entropy-buttons button {
    padding: 10px 14px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    background: #1a1a1e;
    color: #0ff;
    border: 1px solid #0ff;
    border-radius: 6px;
    cursor: pointer;
}

#content_sim .entropy-buttons button:hover {
    background: #252530;
    color: #fff;
}

#content_sim .entropy-buttons button.entropy-btn-barrier-open {
    color: #f0f;
    border-color: #f0f;
}

#content_sim .entropy-row {
    margin-bottom: 12px;
    font-size: 11px;
    color: #bbb;
    font-family: 'Courier New', monospace;
}

#content_sim .entropy-row label {
    display: inline-block;
    margin-right: 8px;
}

#content_sim .entropy-row input[type="range"] {
    width: 80px;
    max-width: 80px;
    vertical-align: middle;
}

#content_sim .entropy-val {
    margin-left: 6px;
    color: #0ff;
    min-width: 2.5em;
    display: inline-block;
}

#content_sim .entropy-stats {
    background: #1a1a1e;
    padding: 10px 12px;
    border-radius: 8px;
    margin: 12px 0;
    font-size: 11px;
    color: #bbb;
    font-family: 'Courier New', monospace;
    border: 1px solid #333;
}

#content_sim .entropy-stats p {
    margin: 5px 0;
    line-height: 1.35;
}

#content_sim .entropy-stats strong {
    display: inline;
    margin-left: 2px;
    color: #0ff;
}

#content_sim .entropy-stats .entropy-max {
    color: #6f6;
}

#content_sim .entropy-stats .entropy-min {
    color: #f66;
}

#content_sim .entropy-viz {
    flex: 1;
    min-width: 320px;
}

#content_sim .entropy-canvas-wrap {
    position: relative;
    background: #111;
    border: 1px solid #333;
    border-radius: 8px;
    overflow: hidden;
    outline: none;
    transition: outline 0.1s ease;
}

#content_sim .entropy-time-reversed-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    color: #f66;
    font-size: 18px;
    font-weight: bold;
    font-family: 'Courier New', monospace;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s ease;
}

#content_sim .entropy-time-reversed-overlay.entropy-overlay-visible {
    opacity: 1;
}

#content_sim .entropy-canvas-wrap canvas#entropy-box-canvas {
    display: block;
    width: 100%;
    max-width: 480px;
    height: auto;
}

#content_sim .entropy-graph-wrap {
    margin-top: 12px;
    background: #111;
    border: 1px solid #333;
    border-radius: 8px;
    padding: 8px;
}

#content_sim .entropy-graph-wrap .entropy-graph-label {
    font-size: 11px;
    color: #888;
    margin-bottom: 4px;
}

#content_sim .entropy-history-plot-wrap {
    position: relative;
    display: inline-block;
}

#content_sim .entropy-graph-wrap canvas#entropy-history-canvas {
    display: block;
    width: 100%;
    max-width: 530px;
    height: 120px;
    background: #0d0d0f;
}

#content_sim .entropy-plot-autoscale-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 28px;
    height: 28px;
    padding: 0;
    border: 1px solid #444;
    border-radius: 4px;
    background: rgba(13, 13, 15, 0.85);
    color: #0ff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

#content_sim .entropy-plot-autoscale-btn:hover {
    background: rgba(26, 26, 30, 0.95);
    border-color: #0ff;
    color: #fff;
}

#content_sim .entropy-plot-autoscale-btn .entropy-autoscale-icon {
    flex-shrink: 0;
}

#content_sim .entropy-detail {
    font-size: 11px;
    color: #666;
    margin-top: 8px;
}

/* Labs section (in content_description) */
#content_description .entropy-labs {
    margin-top: 12px;
}

#content_description .entropy-lab-item {
    margin-bottom: 20px;
    padding: 12px 0;
    border-bottom: 1px solid #ddd;
}

#content_description .entropy-lab-item:last-child {
    border-bottom: none;
}

#content_description .entropy-lab-item h5 {
    margin: 0 0 8px 0;
    font-size: 1em;
    color: #333;
}

#content_description .entropy-lab-item ol {
    margin: 0;
    padding-left: 22px;
}

#content_description .entropy-lab-item li {
    margin-bottom: 6px;
    line-height: 1.4;
}