/**
 * Numerical Integration Lab – Damped Harmonic Oscillator (Euler vs Heun vs RK4)
 * Scoped styles to avoid collision with global CSS.
 */
#content_sim #numericalintegration-simulation {
    width: 100%;
    max-width: 720px;
    box-sizing: border-box;
}

#content_sim .numericalintegration-container {
    font-family: 'Courier New', Courier, monospace;
    width: 100%;
    max-width: 720px;
    margin: 0;
    padding: 12px;
    border: 1px solid #333;
    background: #0a0a0a;
    color: #ccc;
    box-sizing: border-box;
}

#content_sim .numericalintegration-app {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 0;
}

#content_sim .numericalintegration-viewport {
    width: 100%;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#content_sim .numericalintegration-row {
    display: flex;
    gap: 8px;
    min-height: 0;
}

#content_sim .numericalintegration-graph-wrap {
    flex: 1;
    min-width: 0;
    position: relative;
    background: #000;
    border: 1px solid #333;
}

#content_sim .numericalintegration-graph-label {
    position: absolute;
    top: 4px;
    left: 8px;
    font-size: 11px;
    color: #888;
    z-index: 2;
}

#content_sim .numericalintegration-autoscale-btn {
    position: absolute;
    top: 4px;
    right: 8px;
    z-index: 3;
    font-family: 'Courier New', Courier, monospace;
    font-size: 10px;
    padding: 4px 8px;
    background: rgba(40, 40, 40, 0.9);
    color: #aaa;
    border: 1px solid #555;
    cursor: pointer;
    border-radius: 2px;
}

#content_sim .numericalintegration-autoscale-btn:hover {
    background: rgba(60, 60, 60, 0.95);
    color: #ccc;
}

#content_sim .numericalintegration-viewport canvas {
    display: block;
    width: 100%;
    height: 100%;
    background: #000;
}

#content_sim .numericalintegration-spring-wrap {
    height: 140px;
}

#content_sim .numericalintegration-phase-wrap,
#content_sim .numericalintegration-timeseries-wrap {
    height: 220px;
}

#content_sim .numericalintegration-errorchart-wrap {
    height: 200px;
}

#content_sim .numericalintegration-controls {
    width: 100%;
    max-width: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 10px 12px;
    background: #111;
    border: 1px solid #333;
    box-sizing: border-box;
}

#content_sim .numericalintegration-controls h3 {
    margin: 0 0 8px 0;
    font-size: 12px;
    color: #aaa;
    border-bottom: 1px solid #333;
    padding-bottom: 4px;
}

#content_sim .numericalintegration-controls-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#content_sim .numericalintegration-control-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

#content_sim .numericalintegration-control-row label {
    flex: 0 0 110px;
    font-size: 11px;
    color: #bbb;
    white-space: nowrap;
}

#content_sim .numericalintegration-control-row input[type="range"] {
    flex: 1;
    min-width: 50px;
    max-width: 160px;
}

#content_sim .numericalintegration-control-row .numericalintegration-val {
    flex: 0 0 42px;
    font-size: 11px;
    color: #0cf;
    text-align: right;
}

#content_sim .numericalintegration-control-row select {
    min-width: 140px;
    font-family: 'Courier New', monospace;
    font-size: 11px;
    background: #222;
    color: #ccc;
    border: 1px solid #444;
    padding: 4px 6px;
}

#content_sim .numericalintegration-control-row.numericalintegration-k-row,
#content_sim .numericalintegration-control-row.numericalintegration-c-row {
    flex-wrap: wrap;
}

#content_sim .numericalintegration-control-row .numericalintegration-inline-label {
    flex: 0 0 auto;
    margin-left: 8px;
    font-size: 11px;
    color: #bbb;
    white-space: nowrap;
}

#content_sim .numericalintegration-k-row .numericalintegration-inline-label,
#content_sim .numericalintegration-c-row .numericalintegration-inline-label {
    flex: 0 0 95px;
}

#content_sim .numericalintegration-controls-footer {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 8px;
}

#content_sim .numericalintegration-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    width: 100%;
}

#content_sim .numericalintegration-buttons button {
    font-family: 'Courier New', monospace;
    font-size: 11px;
    padding: 6px 10px;
    background: #2a2a2a;
    color: #ccc;
    border: 1px solid #555;
    cursor: pointer;
    border-radius: 2px;
}

#content_sim .numericalintegration-buttons button:hover {
    background: #333;
    color: #fff;
}

#content_sim .numericalintegration-buttons button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#content_sim .numericalintegration-error-box {
    background: #1a1a1a;
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid #333;
    width: 100%;
    box-sizing: border-box;
}

#content_sim .numericalintegration-error-box .numericalintegration-error-label {
    font-size: 10px;
    color: #666;
    margin-bottom: 4px;
}

#content_sim .numericalintegration-error-box .numericalintegration-error-value {
    font-size: 14px;
    font-weight: bold;
    color: #0cf;
}

#content_sim .numericalintegration-error-box .numericalintegration-error-value.high {
    color: #e74c3c;
}

#content_sim .numericalintegration-error-box .numericalintegration-error-hint {
    font-size: 10px;
    color: #666;
    margin-top: 4px;
}

#content_sim .numericalintegration-warning {
    font-size: 11px;
    color: #e74c3c;
    margin-top: 6px;
    padding: 6px;
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid #e74c3c;
    border-radius: 2px;
}

#content_sim .numericalintegration-legend {
    position: absolute;
    top: 24px;
    right: 8px;
    font-size: 10px;
    color: #888;
    z-index: 2;
}

#content_sim .numericalintegration-legend span {
    margin-left: 8px;
}

#content_sim .numericalintegration-legend .leg-euler { color: #e74c3c; }
#content_sim .numericalintegration-legend .leg-heun { color: #f39c12; }
#content_sim .numericalintegration-legend .leg-rk4 { color: #3498db; }
#content_sim .numericalintegration-legend .leg-exact { color: #2ecc71; }

#content_sim .numericalintegration-step-info {
    margin-top: 12px;
    padding: 10px 12px;
    background: #111;
    border: 1px solid #333;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 11px;
    color: #bbb;
    max-height: 320px;
    overflow-y: auto;
}

#content_sim .numericalintegration-step-info-title {
    margin: 0 0 8px 0;
    font-size: 12px;
    color: #aaa;
    border-bottom: 1px solid #333;
    padding-bottom: 4px;
}

#content_sim .numericalintegration-step-info .ni-step-algo {
    margin-bottom: 12px;
    padding: 8px;
    background: #0d0d0d;
    border-left: 3px solid #444;
}

#content_sim .numericalintegration-step-info .ni-step-algo strong {
    color: #0cf;
}

#content_sim .numericalintegration-step-info .ni-step-algo:nth-child(1) { border-left-color: #e74c3c; }
#content_sim .numericalintegration-step-info .ni-step-algo:nth-child(2) { border-left-color: #f39c12; }
#content_sim .numericalintegration-step-info .ni-step-algo:nth-child(3) { border-left-color: #3498db; }

#content_sim .numericalintegration-step-info .ni-step-msg {
    margin: 0;
    color: #888;
}