.mode-demo { width: min(1080px, calc(100% - 40px)); margin: 0 auto 48px; padding: clamp(20px, 4vw, 40px); border: 1px solid var(--line); border-radius: 22px; background: var(--surface); scroll-margin-top: 20px; }
.mode-demo [hidden] { display: none; }
.mode-demo h2 { margin: 8px 0 12px; max-width: 780px; font: 500 clamp(2rem, 4vw, 3rem)/1.08 var(--serif); letter-spacing: -.035em; }
.mode-demo p { font-size: 1rem; }
.mode-demo .simulation-label { margin: 0; color: var(--blue-dark); font-size: .875rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.mode-intro { max-width: 780px; margin-bottom: 26px; }
.mode-layout { display: grid; gap: 30px; }
.mode-layout > * { min-width: 0; }
.mode-controls { display: grid; gap: 20px; align-content: start; }
.mode-controls label { display: block; font-size: 1rem; font-weight: 650; }
.mode-controls label > span { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px; }
.mode-controls select { width: 100%; min-height: 46px; margin-top: 9px; padding: 10px; background: var(--surface); color: var(--ink); border: 1px solid var(--line-strong); border-radius: 8px; font: inherit; }
.mode-controls input[type="range"] { width: 100%; min-height: 44px; margin: 5px 0 0; accent-color: var(--blue-dark); }
.mode-buttons { display: flex; flex-wrap: wrap; gap: 9px; }
.mode-buttons button { min-height: 44px; padding: 10px 13px; color: var(--blue-dark); background: var(--blue-soft); border: 1px solid transparent; border-radius: 8px; font: 650 .875rem var(--sans); cursor: pointer; }
.mode-demo :focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }
.mode-plot { margin: 0; }
.mode-chart-title { margin: 0 0 6px; font-size: 1rem; font-weight: 650; }
.mode-chart-wrap { width: 100%; }
.mode-chart-wrap svg { display: block; width: 100%; height: 258px; overflow: visible; }
.mode-chart-wrap text { fill: var(--ink); font: 14px var(--sans); }
.mode-grid { stroke: var(--line-strong); stroke-width: 1; }
.mode-curve { fill: none; stroke: #194f70; stroke-width: 3; }
.mode-marker { stroke-width: 1.5; stroke-dasharray: 4 4; }
.mode-a { stroke: #194f70; fill: var(--surface); stroke-width: 2; }
.mode-b { stroke: #9a4e1c; fill: #9a4e1c; stroke-width: 2; }
.mode-axis-caption { margin: -12px 0 16px; text-align: center; font-size: .875rem !important; }
.mode-values { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding-top: 16px; border-top: 1px solid var(--line); }
.mode-values p { margin: 0; font-size: .875rem; }
.mode-values strong { display: block; color: var(--ink); font-size: 1.65rem; font-variant-numeric: tabular-nums; }
.mode-result { min-height: 4.5em; padding: 17px 20px; border-left: 3px solid var(--blue); background: var(--blue-soft); }
.mode-model { margin-top: 22px; border-top: 1px solid var(--line); padding-top: 12px; }
.mode-model summary { padding-block: 10px; font-size: 1rem; font-weight: 650; cursor: pointer; }
.mode-model p { font-size: .875rem; }
.mode-model a, .mode-download a { color: var(--blue-dark); text-underline-offset: 4px; }
.mode-download { padding-top: 12px; }
.mode-demo .guide-share { padding-inline: 0; margin-top: 20px; }
.mode-demo .guide-share p { font-size: .875rem; }
.mode-demo code { overflow-wrap: anywhere; }
@media (min-width: 820px) { .mode-layout { grid-template-columns: minmax(250px, .85fr) minmax(0, 1.4fr); gap: 42px; } }
@media (max-width: 400px) { .mode-demo { width: calc(100% - 24px); padding: 18px 14px; } }