@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Libre+Baskerville:wght@400;700&display=swap');
:root { color-scheme: light; --ink: #203732; --muted: #5a706a; --paper: #faf9f5; --rule: #dce2d9; --green: #186450; --red: #ab282b; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.8 'DM Sans', system-ui, sans-serif; }
a { color: var(--green); text-underline-offset: 4px; }
button, input, select { font: inherit; }
button { border: 1px solid #bccdc2; border-radius: 5px; background: white; padding: 7px 13px; color: var(--ink); cursor: pointer; }
button:hover { background: #eaf2eb; }
button:disabled { opacity: .45; cursor: default; }
:focus-visible { outline: 3px solid #cf9e36; outline-offset: 4px; }
.topbar { min-height: 72px; display: flex; align-items: center; justify-content: space-between; padding: 12px 5vw; border-bottom: 1px solid var(--rule); gap: 20px; }
.wordmark { font-size: 12px; letter-spacing: .12em; font-weight: 700; text-decoration: none; }
.wordmark span { color: var(--muted); font-weight: 400; }
.eyebrow { font-size: 11px; letter-spacing: .15em; font-weight: 700; }
.draft { color: #7b683c; font-size: clamp(32px, 5vw, 48px); font-weight: 700; line-height: 1.1; margin: 0; }
main { max-width: 1220px; margin: auto; padding: 0 40px; }
.hero { padding: 65px 0 50px; border-bottom: 1px solid var(--rule); }
h1 { font: 400 clamp(38px, 5vw, 65px)/1.15 'Libre Baskerville', Georgia, serif; letter-spacing: -.045em; margin: 20px 0; }
.intro { color: var(--muted); max-width: 620px; font-size: 19px; }
.reading-layout { display: block; padding-top: 40px; }
.contents { margin: 0 0 44px; padding: 18px 22px 6px; background: #f3f5ef; border-left: 3px solid #b8c7b3; font-size: 13px; line-height: 1.5; }
.contents .eyebrow { color: var(--green); margin: 0 0 12px; }
.contents > div { margin-bottom: 14px; break-inside: avoid; }
.contents .contents-part { margin: 0; font-weight: 600; }
.contents ol { margin: 4px 0 0; padding-left: 22px; }
.contents li { margin: 2px 0; }
.contents a { color: var(--ink); text-decoration: none; }
.contents a:hover { color: var(--green); text-decoration: underline; }
@media(min-width: 760px) { .contents { columns: 2; column-gap: 40px; } .contents .eyebrow { column-span: all; } }
.part-divider { margin: 58px 0 24px; padding-top: 18px; border-top: 2px solid var(--green); color: var(--green); font: 400 clamp(26px, 3.5vw, 34px)/1.35 'Libre Baskerville', Georgia, serif; letter-spacing: -.025em; }
.source-link { display: block; margin-top: 18px; }
article { min-width: 0; width: 100%; }
article > p, .chapter > p, .chapter-title, .subsection-title, .chapter > .review-note { max-width: 76ch; }
.chapter { margin: 0 0 58px; }
h2 { font: 400 29px/1.4 'Libre Baskerville', Georgia, serif; letter-spacing: -.025em; margin: 30px 0 22px; }
h3 { font-size: 20px; margin: 32px 0 16px; }
.chapter-title { font: 400 29px/1.4 'Libre Baskerville', Georgia, serif; letter-spacing: -.025em; margin: 36px 0 22px; }
.subsection-title { font-size: 20px; line-height: 1.5; margin: 32px 0 16px; }
.part-divider + .chapter > .chapter-title:first-child { margin-top: 0; }
.prose-list { max-width: 76ch; margin: 0 0 24px; padding-left: 1.4em; }
.prose-list > li { padding-left: .25em; margin-bottom: 10px; }
.prose-list > li:last-child { margin-bottom: 0; }
.prose-list + .technical-sidebar { margin-top: -8px; }
p { margin: 0 0 19px; }
.review-note { font: 13px/1.7 'DM Sans', system-ui, sans-serif; padding: 14px 18px; margin: 20px 0; border-left: 3px solid; }
.review-note { color: var(--red); background: #fff0ec; border-color: #c23d3d; }
.curiosity-note { margin: -18px 0 32px; padding: 14px 18px; background: #eef2e9; border-left: 3px solid #8caa8e; font-size: 13px; line-height: 1.7; }
.technical-sidebar { max-width: 76ch; margin: 20px 0 26px; padding: 14px 18px; background: #eef2e9; border: 1px solid var(--rule); border-left: 3px solid #8caa8e; border-radius: 4px; }
.technical-sidebar > summary { cursor: pointer; font-size: 14px; font-weight: 600; line-height: 1.5; }
.technical-sidebar[open] > summary { margin-bottom: 14px; }
.technical-sidebar > p { font-size: 13px; line-height: 1.7; margin-bottom: 14px; }
.technical-sidebar > p:last-child { margin-bottom: 0; }
.appendix { border-top: 1px solid var(--rule); padding-top: 30px; }
.equation { max-width: 76ch; font: clamp(22px, 3.5vw, 32px)/1.5 Georgia, serif; text-align: center; padding: 20px 16px; margin: 24px 0; background: #eef2e9; border-radius: 4px; }
.phasor { text-decoration: underline; text-underline-offset: 5px; }
.math-fraction { display: inline-flex; vertical-align: middle; flex-direction: column; text-align: center; font-size: .7em; margin-left: 8px; line-height: 1.5; }
.math-fraction > span:first-child { border-bottom: 1px solid currentColor; padding: 0 7px; }
.math-fraction > span:last-child { padding: 0 7px; }
.widget.cvr-z-widget { padding: clamp(16px, 2svh, 24px); }
.widget.cvr-z-widget h3 { margin-bottom: 8px; }
.cvr-z-widget .cvr-intro { color: var(--muted); margin-bottom: 0; }
.cvr-z-widget .controls { grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 16px 0; gap: 12px 24px; }
.cvr-z-widget .controls label { min-width: 0; }
.cvr-z-widget .controls label > span { align-items: start; line-height: 1.4; }
.cvr-z-widget output { white-space: nowrap; font-variant-numeric: tabular-nums; }
.cvr-z-widget .cvr-reading { margin: 0 0 8px; }
.cvr-z-widget .cvr-reading-caption { display: block; font-size: 12px; color: var(--muted); }
.cvr-z-widget .cvr-reading-value { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; color: #24664d; font-variant-numeric: tabular-nums; line-height: 1.25; }
.cvr-z-widget [data-cvr-target] { font-size: clamp(30px, 4vw, 44px); font-weight: 500; white-space: nowrap; }
.cvr-z-widget [data-cvr-difference] { font-size: clamp(18px, 2.2vw, 24px); }
.cvr-z-widget .cvr-graph { min-height: 0; }
.cvr-z-widget .cvr-graph svg { display: block; width: 100%; height: auto; overflow: visible; }
.cvr-z-widget .cvr-graph text { font: 14px 'DM Sans', system-ui, sans-serif; fill: var(--ink); }
.cvr-z-widget .cvr-graph .cvr-axis-label { fill: var(--muted); font-size: 12px; }
.cvr-z-widget .cvr-graph .cvr-reference-label,
.cvr-z-widget .cvr-graph .cvr-crossover-label { fill: #8c6926; paint-order: stroke; stroke: white; stroke-width: 4px; stroke-linejoin: round; }
@media (min-width: 700px) and (min-height: 500px) {
  .widget.cvr-z-widget { display: grid; grid-template-rows: repeat(5, auto) minmax(0, 1fr); gap: 8px; height: min(680px, calc(100svh - 64px)); }
  .cvr-z-widget > .eyebrow, .widget.cvr-z-widget > h3, .cvr-z-widget .controls, .cvr-z-widget .cvr-reading { margin: 0; }
  .cvr-z-widget .cvr-graph svg { height: 100%; }
}
@media (max-width: 699px) {
  .cvr-z-widget .controls { grid-template-columns: minmax(0, 1fr); }
}
.controller-lab .lab-controls { margin: 20px 0; border-top: 1px solid var(--rule); padding-top: 18px; }
.controller-lab > .eyebrow,
.controller-lab > h3,
.controller-lab > h3 + p { display: none; }
.controller-lab .lab-workbench { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; margin-bottom: 24px; }
.controller-lab { width: 100%; max-width: 100%; margin-left: 0; container: controllerlab / inline-size; }
.controller-lab .diagram svg { min-width: 0; max-width: 100%; }
.controller-lab .branch-tap-diagram text { font-size: 18px; }
.controller-lab .controls label { min-width: 0; }
.controller-lab .lab-feeder-pane, .controller-lab .lab-controller-pane { min-width: 0; }
.controller-lab .lab-controller-pane .lab-controls { margin: 0; }
.controller-lab .lab-splitter { display: none; }
.controller-lab .lab-resizing { user-select: none; cursor: col-resize; }
.controller-lab .lab-visuals { display: grid; gap: 10px; align-content: start; min-width: 0; }
.controller-lab .lab-results strong { display: block; white-space: nowrap; font-variant-numeric: tabular-nums; }
.controller-lab [data-lab-value] { min-width: 7ch; text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
@container controllerlab (min-width: 780px) {
  .controller-lab .lab-workbench { grid-template-columns: minmax(300px, var(--lab-left, 1.65fr)) 12px minmax(280px, var(--lab-right, 1fr)); gap: 6px; align-items: start; }
  .controller-lab .lab-splitter { display: block; align-self: stretch; min-height: 180px; cursor: col-resize; touch-action: none; border-radius: 5px; background: linear-gradient(to right, transparent 5px, #cbd5c5 5px 7px, transparent 7px); }
  .controller-lab .lab-splitter:hover, .controller-lab .lab-splitter:focus-visible { background-color: #eaf1e4; }
  .controller-lab .lab-controller-pane { border-left: 0; padding-left: 6px; }
  .controller-lab .lab-controller-pane .lab-controls { border-top: 0; padding-top: 0; }
  .controller-lab .lab-controller-pane .controls { grid-template-columns: minmax(0, 1fr); }
  .controller-lab .lab-workbench .controls { margin-top: 8px; margin-bottom: 8px; gap: 8px; }
  .controller-lab .lab-workbench .controls label[data-lab-field] { grid-template-rows: 24px 22px 16px; gap: 3px; }
  .controller-lab .lab-feeder-presets { margin-top: 0; }
  .controller-lab .lab-feeder-presets button, .controller-lab .lab-modes button { padding: 5px 9px; font-size: 11px; }
  .controller-lab .lab-preset-hint { margin-bottom: 6px; }
  .controller-lab .lab-feeder-pane > .diagram { height: clamp(240px, 46svh, 420px); }
  .controller-lab .lab-feeder-pane .branch-tap-diagram { height: 100%; max-height: none; }
  .controller-lab .lab-visuals .diagram { text-align: left; }
  .controller-lab .branch-profile { width: 100%; height: auto; max-height: none; aspect-ratio: 800 / 270; }
  .controller-lab .lab-controller-pane .lab-profile-pane { margin-top: 18px; }
  .controller-lab .lab-results { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 14px 0; }
  .controller-lab .lab-results strong { font-size: 17px; }
  .controller-lab .lab-status { font-size: 11px; line-height: 1.5; margin-bottom: 12px; }
  .controller-lab .branch-summary { display: none; }
}
.controller-lab .lab-controls h4 { margin: 0 0 12px; font-size: 14px; }
.controller-lab .lab-modes { display: flex; gap: 8px; flex-wrap: wrap; }
.controller-lab .lab-feeder-presets { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0 8px; }
.controller-lab .lab-feeder-presets button { font-size: 12px; border-radius: 20px; }
.controller-lab .lab-feeder-presets button[aria-pressed=true] { background: #e7f0df; border-color: #7b9a70; }
.controller-lab .lab-preset-hint { color: var(--muted); font-size: 11px; }
.controller-lab .lab-hint { color: var(--muted); font-size: 11px; line-height: 1.5; margin: 0 0 12px; }
.controller-lab .lab-feeder-conditions { width: min(100%, 340px); grid-template-columns: minmax(0, 1fr); }
.controller-lab .lab-modes button, .controller-lab .lab-reset { font-size: 12px; border-radius: 20px; }
.controller-lab .lab-modes button[aria-pressed=true] { background: #e7f0df; border-color: #7b9a70; }
.controller-lab .lab-direction { display: flex; align-items: center; gap: 10px; margin: 12px 0; font-size: 13px; }
.controller-lab .lab-direction select { font: inherit; padding: 5px; border: 1px solid #bccdc2; border-radius: 4px; background: white; }
.controller-lab [data-lab-field][hidden] { display: none; }
.controller-lab .controls label[data-lab-field] { grid-template-rows: 48px 24px 22px; align-content: start; }
.controller-lab .controls label[data-lab-field][hidden] { display: none; }
.controller-lab .controls label[data-lab-field] > span:first-child { align-items: start; }
.controller-lab .controls input[data-lab] { align-self: center; margin: 0; }
.controller-lab .lab-pf-scale { display: flex; justify-content: space-between; gap: 4px; font-size: 10px; color: var(--muted); }
.controller-lab .lab-pf-note { font-size: 10px; color: var(--muted); }
.controller-lab .lab-results { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 20px 0; }
.controller-lab .lab-results small { display: block; color: var(--muted); font-size: 10px; }
.controller-lab .lab-results strong { font-size: 20px; font-weight: 500; }
.controller-lab .lab-status { padding-left: 12px; border-left: 3px solid #a8bd9b; }
.controller-lab .lab-violation { color: var(--red); border-color: var(--red); }
@media(max-width: 560px) { .controller-lab .lab-results { grid-template-columns: repeat(2, 1fr); } }
@media(max-width: 599px) { .cvr-z-widget .cvr-graph text { font-size: 18px; } .cvr-z-widget .cvr-graph .cvr-axis-label { font-size: 16px; } }
@media (min-width: 600px) and (max-height: 699px) { .cvr-z-widget .cvr-graph text { font-size: 18px; } .cvr-z-widget .cvr-graph .cvr-axis-label { font-size: 16px; } }
.automatic-control { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.automatic-control input { accent-color: var(--green); }
.tap-diagram { touch-action: none; }
.diagram .branch-tap-diagram { touch-action: none; width: 100%; min-width: 0; }
.branch-tap-diagram text { font-size: 14px; }
.branch-load-label { font-weight: 600; }
.branch-tap-diagram .branch-reading,
.branch-tap-diagram .branch-load-label {
  paint-order: stroke;
  stroke: white;
  stroke-width: 6px;
  stroke-linejoin: round;
}
.tap-diagram [data-tap]:focus-visible { outline: none; }
.tap-diagram [data-tap]:focus-visible path { stroke-width: 4; }
.regulation-status { padding: 10px 14px; background: #eef2e9; border-left: 3px solid #8caa8e; }
.widget { border: 1px solid #cbd8cc; border-radius: 8px; background: #fff; margin: 30px 0 36px; padding: 24px; box-shadow: 0 5px 20px #233c2c05; }
.widget .eyebrow { color: var(--green); margin: 0 0 6px; }
.widget h3 { margin: 0 0 18px; font-size: 19px; }
.widget p { font-size: 13px; line-height: 1.6; }
.controls { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px 24px; margin: 20px 0; }
.controls label { display: grid; gap: 6px; font-size: 12px; }
.controls label span { display: flex; justify-content: space-between; gap: 12px; }
input[type=range] { width: 100%; accent-color: var(--green); cursor: pointer; }
.metrics { display: flex; flex-wrap: wrap; gap: 24px; background: #f0f5ee; padding: 16px; margin: 16px 0; }
.metric { flex: 1; min-width: 110px; }
.metric strong { display: block; font-size: 23px; font-weight: 500; line-height: 1.4; }
.metric small { color: var(--muted); font-size: 11px; display: block; line-height: 1.5; }
.widget .assumption { color: var(--muted); font-size: 11px; margin: 16px 0 0; }
.table-scroll, .diagram { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 13px; margin: 12px 0 22px; }
th, td { padding: 10px 12px; border-bottom: 1px solid var(--rule); text-align: left; white-space: nowrap; }
th { font-size: 11px; font-weight: 600; color: var(--muted); background: #f0f3ec; }
.article-table th { white-space: normal; line-height: 1.5; }
.article-table td:first-child { white-space: normal; min-width: 10rem; max-width: 25rem; }
.violation { color: var(--red); font-weight: 700; }
.ok { color: var(--green); }
.diagram svg { width: 100%; min-width: 500px; display: block; height: auto; }
.diagram text { font: 12px 'DM Sans', system-ui, sans-serif; fill: var(--ink); }
.diagram .wire { stroke: #3c7564; stroke-width: 4; fill: none; stroke-linecap: round; }
.diagram circle { fill: white; stroke: #3c7564; stroke-width: 2; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.voltage-bar { position: relative; height: 38px; background: linear-gradient(to right, #f9ddd5 0 26.67%, #e1eedf 26.67% 66.67%, #f9ddd5 66.67%); margin: 20px 0 8px; border-radius: 4px; }
.voltage-pin { position: absolute; top: 3px; bottom: 3px; width: 3px; background: var(--green); }
.bar-labels { display: flex; justify-content: space-between; font-size: 10px; color: var(--muted); }
.plot { width: 100%; min-width: 400px; }
.widget.voltage-limits-widget { padding: clamp(12px, 2svh, 20px); }
.voltage-limits-widget .eyebrow { margin-bottom: 4px; }
.voltage-limits-widget .vl-intro { color: var(--muted); margin-bottom: 0; }
.voltage-limits-widget h3 { font-size: 20px; line-height: 1.35; margin-bottom: 6px; }
.voltage-limits-widget .controls { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px 16px; margin: 12px 0; }
.voltage-limits-widget .controls label { min-width: 0; }
.voltage-limits-widget .vl-presets { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 8px; }
.voltage-limits-widget .vl-presets button { font-size: 12px; border-radius: 20px; padding: 5px 10px; }
.voltage-limits-widget .vl-presets button[aria-pressed=true] { background: #e7f0df; border-color: #7b9a70; }
.voltage-limits-widget .vl-graph { width: 100%; min-height: 0; }
.voltage-limits-widget .vl-graph svg { width: 100%; height: auto; display: block; }
.voltage-limits-widget .vl-graph text { font: 12px 'DM Sans', system-ui, sans-serif; fill: var(--ink); }
.voltage-limits-widget .vl-graph .vl-point-label { font-weight: 600; paint-order: stroke; stroke: #fff; stroke-width: 4px; stroke-linejoin: round; }
.voltage-limits-widget .vl-graph .vl-band-label { font-size: 11px; fill: #526b46; }
.voltage-limits-widget .vl-results { min-height: 40px; padding-top: 6px; }
.voltage-limits-widget .vl-results strong { display: block; font-size: 14px; line-height: 1.4; font-weight: 500; }
.voltage-limits-widget .vl-budget-note { margin: 4px 0 0; color: var(--muted); }
.voltage-limits-widget .vl-warning { color: var(--red); }
.voltage-limits-widget .vl-success { color: var(--green); }
.voltage-limits-widget .vl-feedback { padding: 18px 0 8px; color: var(--muted); }
.voltage-limits-widget .vl-support { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; padding: 8px 0 20px; }
.voltage-limits-widget .vl-support h4 { font-size: 12px; margin: 0 0 16px; }
.voltage-limits-widget .vl-support p { font-size: 11px; line-height: 1.6; margin: 8px 0; }
.voltage-limits-widget .vl-budget-track, .voltage-limits-widget .vl-window-track { height: 12px; background: #edf0e7; border-radius: 3px; position: relative; margin: 8px 0 12px; }
.voltage-limits-widget .vl-budget-track { overflow: hidden; }
.voltage-limits-widget .vl-budget-track > span { display: block; height: 100%; background: #6c9361; }
.voltage-limits-widget .vl-budget-track > .over-budget { background: #b44f47; }
.voltage-limits-widget .vl-window-range { position: absolute; top: 0; bottom: 0; background: #8db57b; min-width: 1px; }
.voltage-limits-widget .vl-window-cursor { position: absolute; width: 2px; top: -4px; bottom: -4px; background: var(--ink); }
.voltage-limits-widget .vl-scale-labels { position: relative; height: 20px; font-size: 10px; color: var(--muted); }
.voltage-limits-widget .vl-scale-labels span:nth-child(2) { position: absolute; left: 60%; transform: translateX(-50%); }
.voltage-limits-widget .vl-scale-labels span:last-child { position: absolute; right: 0; }
.voltage-limits-widget .vl-subtle { color: var(--muted); }
.voltage-limits-widget .vl-technical { border-top: 1px solid var(--rule); padding-top: 14px; font-size: 11px; color: var(--muted); }
.voltage-limits-widget .vl-technical summary { cursor: pointer; font-size: 12px; }
.voltage-limits-widget .vl-technical dl { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 14px; }
.voltage-limits-widget .vl-technical dd { margin: 0; color: var(--ink); }
.voltage-limits-widget .vl-technical p { font-size: 11px; margin: 12px 0 0; }
@media (min-width: 700px) and (min-height: 500px) {
  .widget.voltage-limits-widget { display: grid; grid-template-rows: repeat(5, auto) minmax(0, 1fr) auto; gap: 6px; height: min(720px, calc(100svh - 110px)); }
  .voltage-limits-widget .eyebrow, .voltage-limits-widget h3, .voltage-limits-widget .controls, .voltage-limits-widget .vl-presets { margin: 0; }
  .voltage-limits-widget .vl-graph svg { height: 100%; }
}
.load-response-widget .lr-legend { display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: 12px; margin: 12px 0 16px; }
.load-response-widget .lr-legend span { display: inline-flex; align-items: center; gap: 8px; }
.load-response-widget .lr-fixed { color: #a67c2b; }
.load-response-widget .lr-ideal { color: #24664d; }
.load-response-widget .lr-legend i { width: 25px; border-top: 3px solid currentColor; }
.load-response-widget .lr-fixed i { border-top-style: dashed; }
.load-response-widget .lr-loading { max-width: 760px; grid-template-columns: minmax(0, 1fr); margin: 16px auto; }
.load-response-widget .lr-loading label { min-width: 0; }
.load-response-widget .lr-loading output { font-variant-numeric: tabular-nums; }
.load-response-widget .lr-loading-scale { color: var(--muted); font-size: 11px; }
.load-response-widget .lr-charts { max-width: 760px; margin-inline: auto; }
.load-response-widget .lr-charts svg { width: 100%; height: auto; max-height: 400px; display: block; }
.load-response-widget .lr-charts text { font: 14px 'DM Sans', system-ui, sans-serif; fill: var(--ink); }
.load-response-widget .lr-charts .lr-axis-label { font-size: 12px; fill: var(--muted); }
.load-response-widget .lr-charts .lr-endpoint-label { font-size: 16px; font-weight: 600; paint-order: stroke; stroke: white; stroke-width: 4px; stroke-linejoin: round; }
.widget.ldc-controller-widget { padding: clamp(12px, 2svh, 20px); }
.ldc-controller-widget .eyebrow { margin-bottom: 4px; }
.ldc-controller-widget h3 { font-size: 20px; line-height: 1.35; margin-bottom: 6px; }
.ldc-controller-widget .ldc-intro { color: var(--muted); margin-bottom: 0; }
.ldc-controller-widget .ldc-steps { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 6px; }
.ldc-controller-widget .ldc-step-note { min-height: 42px; margin: 0; padding: 8px 12px; background: #f3f5ef; border-left: 3px solid #8caa8e; font-size: 13px; line-height: 1.5; }
.ldc-controller-widget .ldc-control-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 20px; margin: 10px 0; }
.ldc-controller-widget .ldc-control-grid > section { min-width: 0; }
.ldc-controller-widget h4 { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 10px; font-size: 12px; line-height: 1.4; margin: 0 0 6px; }
.ldc-controller-widget .ldc-current { font-size: 11px; font-weight: 400; color: var(--muted); font-variant-numeric: tabular-nums; }
.ldc-controller-widget .ldc-modes, .ldc-controller-widget .ldc-presets { display: flex; flex-wrap: wrap; gap: 6px; }
.ldc-controller-widget .ldc-modes { margin-bottom: 6px; }
.ldc-controller-widget .ldc-presets { margin-top: 8px; }
.ldc-controller-widget button { font-size: 11px; border-radius: 20px; padding: 5px 9px; }
.ldc-controller-widget button[aria-pressed=true] { background: #e7f0df; border-color: #7b9a70; }
.ldc-controller-widget .ldc-setting-unit { min-height: 18px; font-size: 11px; line-height: 1.5; color: var(--muted); margin: 0 0 4px; }
.ldc-controller-widget [data-compensation-units][hidden] { display: block; visibility: hidden; }
.ldc-controller-widget .controls { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px 12px; margin: 0; }
.ldc-controller-widget .controls label { min-width: 0; grid-template-rows: 30px 22px; gap: 3px; font-size: 11px; }
.ldc-controller-widget .controls label > span { align-items: start; gap: 8px; line-height: 1.3; }
.ldc-controller-widget .controls output { white-space: nowrap; font-variant-numeric: tabular-nums; }
.ldc-controller-widget .ldc-current-lock { display: flex; align-items: center; gap: 6px; margin: 6px 0; font-size: 11px; line-height: 1.4; cursor: pointer; }
.ldc-controller-widget .ldc-current-lock input { margin: 0; flex-shrink: 0; }
.ldc-controller-widget .ldc-profile { width: 100%; min-height: 0; }
.ldc-controller-widget .ldc-profile svg { display: block; width: 100%; height: auto; }
.ldc-controller-widget .ldc-profile text { font: 12px 'DM Sans', system-ui, sans-serif; fill: var(--ink); }
.ldc-controller-widget .ldc-profile .ldc-point-label { font-weight: 600; paint-order: stroke; stroke: white; stroke-width: 4px; stroke-linejoin: round; }
.ldc-controller-widget .ldc-profile .ldc-compensation-label,
.ldc-controller-widget .ldc-profile .ldc-reference-label,
.ldc-controller-widget .ldc-profile .ldc-reference-end-label,
.ldc-controller-widget .ldc-profile .ldc-end-label,
.ldc-controller-widget .ldc-profile .ldc-drop-label { paint-order: stroke; stroke: white; stroke-width: 3px; stroke-linejoin: round; font-variant-numeric: tabular-nums; }
.ldc-controller-widget .ldc-profile .ldc-reference-label,
.ldc-controller-widget .ldc-profile .ldc-reference-end-label { fill: #a67c2b; }
.ldc-controller-widget .ldc-profile .ldc-compensation-label { fill: #24664d; }
.ldc-controller-widget .ldc-readout { margin: 0; font-size: 13px; font-weight: 500; line-height: 1.4; }
.ldc-controller-widget .ldc-status { min-height: 24px; padding-top: 2px; font-size: 14px; font-weight: 500; line-height: 1.4; margin: 0; }
.ldc-controller-widget .ldc-violation { color: var(--red); }
.ldc-controller-widget .ldc-safe, .ldc-controller-widget .ldc-achieved { color: var(--green); }
@media (min-width: 700px) and (min-height: 500px) {
  .widget.ldc-controller-widget { display: grid; grid-template-rows: repeat(6, auto) minmax(0, 1fr) repeat(2, auto); gap: 6px; height: min(860px, calc(100svh - 32px)); scroll-margin-top: -74px; }
  .ldc-controller-widget .eyebrow, .ldc-controller-widget h3, .ldc-controller-widget .ldc-steps, .ldc-controller-widget .ldc-control-grid { margin: 0; }
  .ldc-controller-widget .ldc-profile svg { height: 100%; }
}
@media (max-width: 699px) {
  .ldc-controller-widget .ldc-control-grid { grid-template-columns: minmax(0, 1fr); }
  .ldc-controller-widget .ldc-profile text { font-size: 16px; }
  .ldc-controller-widget .ldc-status { min-height: 0; }
}
@media (max-height: 700px) {
  .ldc-controller-widget .ldc-profile text { font-size: 16px; }
}
@media (max-width: 420px) {
  .ldc-controller-widget .controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media(max-width: 720px) {
      .load-response-widget .lr-charts .lr-axis-label { font-size: 16px; }
  .load-response-widget .lr-charts .lr-endpoint-label { font-size: 18px; }
}
@media(max-width: 560px) {
  .voltage-limits-widget .controls { grid-template-columns: minmax(0, 1fr); }
  .voltage-limits-widget .vl-support { grid-template-columns: 1fr; gap: 12px; }
  .voltage-limits-widget .vl-graph text { font-size: 15px; }
  .voltage-limits-widget .vl-graph .vl-band-label { font-size: 13px; }
}
footer { border-top: 1px solid var(--rule); margin-top: 50px; padding: 24px 0 70px; font-size: 12px; color: var(--muted); }
footer h2 { font: 600 15px 'DM Sans', system-ui, sans-serif; }
@media(max-width: 900px) { main { padding: 0 22px; } .hero { padding-top: 40px; } }
@media(max-width: 500px) { .wordmark span { display: none; } .topbar { padding: 12px 22px; } .widget { padding: 16px; } h2, .chapter-title { font-size: 25px; } }
@media(prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print { .contents, .topbar, .controls, .actions { display: none; } .reading-layout { display: block; } .widget { break-inside: avoid; } main { padding: 0; } }
.voltage-drop-formula-widget { container-type: inline-size; }
.voltage-drop-formula-widget .vdf-equation { display: flex; flex-wrap: wrap; justify-content: center; align-items: baseline; align-content: center; gap: .2em; min-height: 140px; margin: 16px 0; font-size: clamp(20px, 2.7cqi, 28px); line-height: 1.2; }
.voltage-drop-formula-widget .vdf-equation > span { white-space: nowrap; }
.voltage-drop-formula-widget .vdf-equation [hidden] { display: none; }
.voltage-drop-formula-widget .vdf-resistance { color: #217c9c; }
.voltage-drop-formula-widget .vdf-reactance { color: #956719; }
.voltage-drop-formula-widget .vdf-current { color: var(--green); }
.voltage-drop-formula-widget .controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.voltage-drop-formula-widget .controls label { min-width: 0; }
.voltage-drop-formula-widget output { font-variant-numeric: tabular-nums; text-align: right; }
.voltage-drop-formula-widget .vdf-angle-scale { display: flex; justify-content: space-between; margin-top: -5px; color: var(--muted); font-size: 11px; }
.voltage-drop-formula-widget .vdf-numbers { text-align: center; font-variant-numeric: tabular-nums; font-size: 15px; }
@media(max-width: 540px) {
  .voltage-drop-formula-widget .controls { grid-template-columns: minmax(0, 1fr); }
}
.widget.phase-monitoring-widget h3 { margin-bottom: 8px; }
.phase-monitoring-widget .phase-intro { color: var(--muted); margin-bottom: 18px; }
.phase-monitoring-widget .phase-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 16px 28px; margin-bottom: 16px; }
.phase-monitoring-widget .phase-imbalance { display: grid; gap: 5px; flex: 1 1 280px; max-width: 600px; min-width: 0; font-size: 12px; }
.phase-monitoring-widget .phase-imbalance > span { display: flex; justify-content: space-between; gap: 12px; }
.phase-monitoring-widget output { font-variant-numeric: tabular-nums; white-space: nowrap; }
.phase-monitoring-widget .phase-imbalance input { margin: 0; }
.phase-monitoring-widget .phase-slider-scale { color: var(--muted); font-size: 11px; }
.phase-monitoring-widget .phase-selection { font-size: 12px; }
.phase-monitoring-widget .phase-buttons { display: flex; gap: 6px; margin-top: 4px; }
.phase-monitoring-widget .phase-buttons button { min-width: 38px; padding: 5px 12px; font-size: 13px; }
.phase-monitoring-widget .phase-buttons button[aria-pressed=true] { background: #e7f0df; border-color: #7b9a70; font-weight: 700; }
.phase-monitoring-widget .phase-reset { font-size: 12px; padding: 5px 12px; }
.phase-monitoring-widget .phase-shared { display: flex; align-items: baseline; flex-wrap: wrap; justify-content: space-between; gap: 4px 20px; padding: 10px 14px; margin-bottom: 14px; background: #f0f5ee; border-radius: 4px; font-size: 14px; }
.phase-monitoring-widget [data-phase-tap] { display: inline-block; min-width: 3ch; font-size: 20px; font-variant-numeric: tabular-nums; }
.phase-monitoring-widget [data-phase-action] { color: var(--muted); font-size: 12px; }
.phase-monitoring-widget .phase-legend { display: flex; flex-wrap: wrap; gap: 4px 20px; margin-bottom: 8px; color: var(--muted); font-size: 11px; }
.phase-monitoring-widget .phase-legend > span { display: inline-flex; align-items: center; gap: 6px; }
.phase-monitoring-widget .phase-legend i { display: inline-block; width: 18px; height: 10px; border-radius: 2px; }
.phase-monitoring-widget .phase-range-swatch { background: #e5efdf; }
.phase-monitoring-widget .phase-band-swatch { background: #b9d2bf; border: 1px solid #7eaa8d; }
.phase-monitoring-widget .phase-row { padding: 10px 12px 14px; border: 1px solid transparent; border-radius: 5px; margin: 0 0 4px; }
.phase-monitoring-widget .phase-row[data-monitored=true] { border-color: #9cb89f; background: #f8fbf5; }
.phase-monitoring-widget .phase-row-heading { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 4px 16px; margin-bottom: 9px; }
.phase-monitoring-widget .phase-name { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 12px; font-size: 15px; font-weight: 600; }
.phase-monitoring-widget .phase-watched { font-size: 11px; font-weight: 400; color: var(--muted); }
.phase-monitoring-widget .phase-row[data-monitored=true] .phase-watched { color: var(--green); font-weight: 600; }
.phase-monitoring-widget .phase-reading { display: flex; align-items: baseline; gap: 14px; font-variant-numeric: tabular-nums; }
.phase-monitoring-widget .phase-reading strong { font-size: 20px; font-weight: 500; color: var(--green); }
.phase-monitoring-widget .phase-reading > span { font-size: 12px; min-width: 11ch; text-align: right; color: var(--muted); }
.phase-monitoring-widget .phase-row[data-in-band=false] .phase-reading strong { color: #966722; }
.phase-monitoring-widget .phase-row[data-in-range=false] .phase-reading strong { color: var(--red); }
.phase-monitoring-widget .phase-track { position: relative; height: 18px; background: #f1f1ec; border-radius: 3px; }
.phase-monitoring-widget .phase-service-band, .phase-monitoring-widget .phase-regulation-band { position: absolute; top: 0; bottom: 0; }
.phase-monitoring-widget .phase-service-band { background: #e5efdf; }
.phase-monitoring-widget .phase-regulation-band { background: #b9d2bf; border-inline: 1px solid #7eaa8d; }
.phase-monitoring-widget .phase-center { position: absolute; top: 0; bottom: 0; border-left: 1px dashed #537c61; }
.phase-monitoring-widget .phase-marker { position: absolute; top: 50%; width: 16px; height: 16px; border: 3px solid white; border-radius: 50%; background: var(--phase-color); box-shadow: 0 0 0 1px var(--phase-color); transform: translate(-50%, -50%); transition: left 180ms ease-out; }
.phase-monitoring-widget .phase-row[data-in-range=false] .phase-marker { background: var(--red); box-shadow: 0 0 0 1px var(--red); }
.phase-monitoring-widget .phase-axis { position: relative; height: 22px; margin: 0 13px; color: var(--muted); font-size: 11px; }
.phase-monitoring-widget .phase-axis > span { position: absolute; transform: translateX(-50%); }
.phase-monitoring-widget .phase-axis > span:first-child { transform: none; }
.phase-monitoring-widget .phase-axis > span:last-child { transform: translateX(-100%); }
.phase-monitoring-widget .phase-axis-label { text-align: center; color: var(--muted); margin: 0 0 12px; font-size: 11px; }
.phase-monitoring-widget .phase-status { min-height: 24px; padding-top: 2px; font-size: 14px; font-weight: 500; line-height: 1.4; margin: 0; color: var(--green); }
.phase-monitoring-widget .phase-status[data-in-band=false] { color: var(--red); }
@media(max-width: 560px) {
  .widget.phase-monitoring-widget h3 { line-height: 1.4; }
  .phase-monitoring-widget .phase-intro { margin-bottom: 12px; line-height: 1.5; }
  .phase-monitoring-widget .phase-controls { gap: 12px 20px; }
  .phase-monitoring-widget .phase-imbalance { flex-basis: 100%; max-width: none; }
  .phase-monitoring-widget .phase-buttons button { min-width: 44px; min-height: 44px; }
  .phase-monitoring-widget .phase-shared { padding: 8px 12px; }
  .phase-monitoring-widget .phase-row { padding: 6px 8px 10px; }
  .phase-monitoring-widget .phase-row-heading { gap: 2px 12px; line-height: 1.4; margin-bottom: 7px; }
  .phase-monitoring-widget .phase-name { flex-basis: 100%; }
  .phase-monitoring-widget .phase-reading { flex: 1; justify-content: space-between; }
  .phase-monitoring-widget .phase-reading strong { font-size: 19px; line-height: 1.4; }
  .phase-monitoring-widget .phase-axis { margin-inline: 9px; }
}
@media (min-width: 700px) and (min-height: 500px) and (max-height: 700px) {
  .widget.phase-monitoring-widget { padding: 16px; }
  .phase-monitoring-widget > .eyebrow { margin-bottom: 2px; }
  .widget.phase-monitoring-widget h3 { line-height: 1.35; margin-bottom: 6px; }
  .phase-monitoring-widget .phase-intro { margin-bottom: 10px; font-size: 12px; }
  .phase-monitoring-widget .phase-controls { gap: 12px 24px; margin-bottom: 8px; }
  .phase-monitoring-widget .phase-shared { padding: 6px 12px; margin-bottom: 8px; }
  .phase-monitoring-widget [data-phase-tap] { font-size: 18px; line-height: 1.3; }
  .phase-monitoring-widget .phase-legend { margin-bottom: 4px; }
  .phase-monitoring-widget .phase-row { padding: 6px 10px 8px; margin-bottom: 2px; }
  .phase-monitoring-widget .phase-row-heading { margin-bottom: 5px; line-height: 1.4; }
  .phase-monitoring-widget .phase-reading strong { font-size: 18px; line-height: 1.3; }
  .phase-monitoring-widget .phase-track { height: 14px; }
  .phase-monitoring-widget .phase-axis { height: 20px; margin-inline: 11px; }
  .phase-monitoring-widget .phase-axis-label { margin-bottom: 8px; line-height: 1.4; }
}
@media(prefers-reduced-motion: reduce) { .phase-monitoring-widget .phase-marker { transition: none; } }