#heloc-form fieldset {
    border: 1px solid var(--color-canvasBorder, #565764);
    border-radius: 8px;
    margin-bottom: 20px;
}
#heloc-form button {
    margin-top: 10px;
}
.calc-error {
    background: #e34948;
    border-radius: 6px;
    color: #fff;
    padding: 10px 14px;
}
.disclaimer {
    background: rgba(237, 161, 0, 0.12);
    border-left: 4px solid #eda100;
    padding: 10px 14px;
}
.results-summary {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin: 20px 0;
}
.result-card {
    background: var(--color-canvasDark);
    border-radius: 8px;
    flex: 1 1 220px;
    padding: 16px;
}
.result-card h3 {
    margin-top: 0;
}
.result-card.highlight {
    border: 2px solid #1baf7a;
}
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* Chart (see dataviz skill palette reference) */
.viz-root {
    --surface-1:      #fcfcfb;
    --text-primary:   #0b0b0b;
    --text-secondary: #52514e;
    --text-muted:     #898781;
    --gridline:       #e1e0d9;
    --baseline-axis:  #c3c2b7;
    --series-baseline: #2a78d6;
    --series-strategy: #1baf7a;
    background: var(--surface-1);
    border-radius: 8px;
    padding: 12px;
    position: relative;
}
@media (prefers-color-scheme: dark) {
    .viz-root {
        --surface-1:      #1a1a19;
        --text-primary:   #ffffff;
        --text-secondary: #c3c2b7;
        --text-muted:     #898781;
        --gridline:       #2c2c2a;
        --baseline-axis:  #383835;
        --series-baseline: #3987e5;
        --series-strategy: #199e70;
    }
}
.chart-legend {
    display: flex;
    gap: 20px;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.legend-item {
    align-items: center;
    display: inline-flex;
    gap: 6px;
}
.swatch {
    border-radius: 2px;
    display: inline-block;
    height: 10px;
    width: 20px;
}
.swatch-baseline { background: var(--series-baseline); }
.swatch-strategy { background: var(--series-strategy); }
#chart {
    display: block;
    width: 100%;
    height: auto;
}
.chart-gridline { stroke: var(--gridline); stroke-width: 1; }
.chart-axis { stroke: var(--baseline-axis); stroke-width: 1; }
.chart-axis-label { fill: var(--text-muted); font-size: 12px; }
.chart-line-baseline { fill: none; stroke: var(--series-baseline); stroke-width: 2; }
.chart-line-strategy { fill: none; stroke: var(--series-strategy); stroke-width: 2; }
.chart-crosshair { stroke: var(--text-muted); stroke-width: 1; stroke-dasharray: 3 3; }
.chart-dot-baseline { fill: var(--series-baseline); }
.chart-dot-strategy { fill: var(--series-strategy); }
.chart-hover-rect { fill: transparent; }
.chart-tooltip {
    background: var(--surface-1);
    border: 1px solid var(--gridline);
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    color: var(--text-primary);
    font-size: 13px;
    padding: 8px 10px;
    pointer-events: none;
    position: absolute;
    white-space: nowrap;
}
.chart-tooltip .tt-baseline { color: var(--series-baseline); }
.chart-tooltip .tt-strategy { color: var(--series-strategy); }