:root {
  color-scheme: light;
  --ink: #171717;
  --blue: #000080;
  --link: #003399;
  --paper: #fff;
  --page: #e8e8e8;
  --rule: #777;
  --light-rule: #b8b8b8;
  --soft: #f3f3f3;
  --highlight: #fff6bf;
  --error: #9b0000;
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--page); color: var(--ink); line-height: 1.5; }
button, input { font: inherit; }
button { cursor: pointer; }
a { color: var(--link); text-decoration: underline; }
a:visited { color: #551a8b; }
a:hover { color: #c00000; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid #c00000; outline-offset: 2px; }
.skip-link { position: absolute; top: -100px; left: 12px; padding: 6px 10px; background: #ff0; color: #000; z-index: 10; }
.skip-link:focus { top: 12px; }
.wrap { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }

.site-header { background: var(--blue); color: #fff; padding: 12px 20px; border-bottom: 4px solid #9a9a9a; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; font: 18px Arial, Helvetica, sans-serif; }
.brand strong { font-weight: 700; }
.brand-mark { display: inline-block; color: #ff0; font: bold 24px/1 'Courier New', monospace; }
.header-link, .header-link:visited { color: #fff; font: 14px Arial, Helvetica, sans-serif; }
.header-link:hover { color: #ff0; }
.header-link span { margin-left: 3px; }

.intro { padding: 32px 0 22px; }
.eyebrow, .section-kicker, .version, .result-label, .track-caption, .live-badge, .visual-label, .metric-icon { font-family: 'Courier New', Courier, monospace; }
.eyebrow { display: flex; align-items: center; gap: 10px; color: #444; font-size: 13px; font-weight: bold; letter-spacing: .02em; }
.eyebrow-line { width: 20px; border-top: 2px solid var(--blue); }
.version { margin-left: auto; color: #555; font-weight: normal; }
.intro h1 { margin: 10px 0 8px; font-size: clamp(31px, 4.5vw, 49px); line-height: 1.12; letter-spacing: -.025em; }
.intro h1 em { font-style: normal; color: var(--blue); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.intro p { max-width: 790px; margin: 0; font-size: 17px; }

.workspace { display: grid; grid-template-columns: 1fr 1fr; background: var(--paper); border: 2px solid #444; box-shadow: 4px 4px 0 #b7b7b7; }
.controls-panel, .results-panel { min-width: 0; padding: 20px; }
.controls-panel { border-right: 2px solid #444; }
.results-panel { background: #fafafa; }
.panel-heading, .results-top, .section-heading, .advanced-heading { display: flex; align-items: start; justify-content: space-between; gap: 16px; }
.section-kicker { color: #454545; font-size: 12px; font-weight: bold; }
.panel-heading h2, .results-panel h2 { margin: 3px 0 0; font-size: 25px; line-height: 1.2; }
.text-button { padding: 3px 6px; background: #e9e9e9; border: 1px outset #aaa; border-radius: 0; color: var(--blue); text-decoration: underline; white-space: nowrap; font: 14px Arial, Helvetica, sans-serif; }
.text-button:active { border-style: inset; }
.direction-note { margin: 18px 0 14px; font-size: 14px; }
.direction-note span { color: var(--blue); font: bold 19px 'Courier New', monospace; vertical-align: middle; margin-right: 5px; }
.object-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.object-card { min-width: 0; margin: 0; padding: 12px; border: 1px solid #666; background: #f7f7f7; }
.object-card legend { display: flex; align-items: center; gap: 6px; padding: 0 4px; font-weight: bold; font-size: 16px; }
.object-index { display: inline-block; background: var(--blue); color: #fff; padding: 0 5px; font: bold 14px 'Courier New', monospace; }
.motion-arrow { margin-left: auto; color: var(--blue); font: bold 19px 'Courier New', monospace; }
.object-card label, .field label { display: flex; justify-content: space-between; gap: 5px; margin: 12px 0 4px; font: bold 14px Arial, Helvetica, sans-serif; }
.object-card label span, .field label span { font-weight: normal; color: #444; }
.object-card input, .field input { width: 100%; padding: 7px 8px; border: 2px inset #aaa; border-radius: 0; background: #fff; color: #111; font: 17px 'Courier New', monospace; }
.object-card input[aria-invalid="true"], .field input[aria-invalid="true"] { border-color: var(--error); }
.advanced-heading { align-items: end; margin: 18px 0 4px; padding-bottom: 4px; border-bottom: 1px solid #777; }
.hint { color: #555; font: 13px Arial, Helvetica, sans-serif; text-align: right; }
.condition-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.field { min-width: 0; }
.field small { display: block; margin-top: 5px; color: #444; font: 12px/1.3 Arial, Helvetica, sans-serif; }
.error { border: 1px solid var(--error); background: #fff0f0; color: var(--error); padding: 8px; font-size: 14px; }

.results-top { align-items: center; }
.live-badge { color: #006000; font: bold 12px 'Courier New', monospace; }
.live-badge span { display: inline-block; width: 8px; height: 8px; margin-right: 4px; background: #008000; border: 1px solid #004800; }
.results-panel h2 { margin-bottom: 14px; }
.collision-visual { border: 1px solid #777; background: #fff; padding: 12px; }
.visual-track { display: grid; grid-template-columns: 1fr 38px 1fr; align-items: end; gap: 3px; min-height: 150px; position: relative; }
.visual-track::after { content: ""; position: absolute; left: 0; right: 0; bottom: 21px; border-top: 1px dashed #777; }
.moving-object { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: start; padding-left: 8px; }
.moving-object.right { align-items: end; padding: 0 8px 0 0; }
.visual-label { font-size: 12px; font-weight: bold; }
.camel-picture { display: block; width: 110px; height: 110px; object-fit: cover; border: 1px solid #777; }
.camel-picture.mirror { transform: scaleX(-1); }
.visual-velocity { color: var(--blue); font: bold 12px 'Courier New', monospace; white-space: nowrap; }
.moving-object.right .visual-velocity { color: #006000; }
.impact-symbol { position: relative; z-index: 1; align-self: center; color: #a00000; font-size: 24px; text-align: center; }
.track-caption { display: flex; justify-content: space-between; gap: 12px; margin-top: 10px; border-top: 1px dotted #777; padding-top: 5px; color: #444; font-size: 11px; }
.hero-result { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: 15px; padding: 12px; border: 2px solid #333; background: var(--highlight); }
.result-label { font-size: 13px; font-weight: bold; }
.info { display: inline-grid; place-items: center; width: 18px; height: 18px; padding: 0; border: 1px solid var(--blue); border-radius: 0; background: #fff; color: var(--blue); font: bold 12px Georgia, serif; }
.result-number { margin-top: 5px; color: #000; font: bold clamp(32px, 4vw, 52px)/1.12 'Courier New', monospace; letter-spacing: -.06em; white-space: nowrap; font-variant-numeric: tabular-nums; }
.result-number span { font-size: 19px; letter-spacing: 0; }
.hero-result p { margin: 4px 0 0; font-size: 13px; }
.hero-glyph { color: #888; font: 40px 'Courier New', monospace; }

.force-comparison { margin-top: 12px; border: 1px solid #777; background: #fff; padding: 10px 12px; }
.force-comparison h3 { margin: 0 0 3px; color: var(--blue); font: bold 16px Arial, Helvetica, sans-serif; text-transform: uppercase; }
.force-comparison p { margin: 5px 0; font-size: 14px; }
.force-comparison strong { background: #fff3a0; }
.force-comparison table { width: 100%; margin-top: 9px; border-collapse: collapse; font: 13px Arial, Helvetica, sans-serif; }
.force-comparison caption { text-align: left; font-weight: bold; padding-bottom: 3px; }
.force-comparison th, .force-comparison td { border: 1px solid #777; padding: 4px 6px; text-align: left; }
.force-comparison th { background: #e6e6e6; }
.force-comparison td:first-child { white-space: nowrap; font-family: 'Courier New', monospace; }
.force-comparison .comparison-note { margin-top: 8px; color: #444; font: 12px/1.4 Arial, Helvetica, sans-serif; }
.result-two { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px; border: 1px solid #777; background: #fff; }
.result-two > div { min-width: 0; padding: 10px; }
.result-two > div + div { border-left: 1px solid #777; }
.result-two strong { display: block; font: bold 23px 'Courier New', monospace; margin-top: 5px; }
.result-two strong small { font-size: 14px; font-weight: normal; }
.result-detail { display: block; color: #444; font-size: 12px; }
.caution { display: flex; gap: 9px; align-items: start; margin-top: 12px; border-top: 1px dashed #777; padding-top: 10px; }
.caution-icon { flex: none; display: grid; place-items: center; width: 19px; height: 19px; background: #ff0; border: 1px solid #333; font: bold 13px Arial, Helvetica, sans-serif; }
.caution p { margin: 0; font-size: 13px; }

.detail-section { padding-top: 40px; }
.section-heading { align-items: end; padding-bottom: 10px; border-bottom: 2px solid var(--blue); margin-bottom: 12px; }
.section-heading h2 { margin: 3px 0 0; font-size: 28px; }
.section-heading p { max-width: 390px; margin: 0; font-size: 13px; }
.metric-grid { display: grid; grid-template-columns: repeat(2, 1fr); border: 1px solid #777; background: #fff; }
.metric { min-width: 0; min-height: 150px; padding: 13px; border-right: 1px solid #777; border-bottom: 1px solid #777; }
.metric.net { grid-column: 1 / -1; min-height: 0; border-right: 0; }
.metric:nth-child(odd):not(.net) { border-right: 0; }
.metric:nth-last-child(-n+2) { border-bottom: 0; }
.metric.accent { background: #fffbe1; }
.metric-icon { color: var(--blue); font-size: 19px; }
.metric h3 { margin: 8px 0 3px; font: bold 14px Arial, Helvetica, sans-serif; }
.metric strong { display: block; font: bold 24px 'Courier New', monospace; }
.metric strong small { font-size: 14px; font-weight: normal; }
.metric p { margin: 4px 0 0; color: #444; font-size: 13px; }
.net-axis { display: flex; justify-content: space-between; gap: 8px; max-width: 520px; margin: 10px 0 5px; padding-top: 8px; border-top: 2px solid #555; color: #444; font: 12px 'Courier New', monospace; }
.net-axis span:nth-child(2) { color: var(--blue); font-weight: bold; }

.copy-button { margin-top: 14px; background: #e9e9e9; border: 2px outset #aaa; border-radius: 0; padding: 7px 10px; color: var(--blue); font: bold 14px Arial, Helvetica, sans-serif; text-decoration: underline; }
.copy-button:active { border-style: inset; }
.copy-button span { margin-left: 8px; }
.copy-status { min-height: 1.5em; margin: 5px 0 0; color: #006000; font-size: 13px; }
.formula-section { padding-top: 48px; padding-bottom: 40px; }
.formula-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.formula-grid article { border: 1px solid #777; background: #fff; padding: 15px; }
.formula-index { color: var(--blue); font: bold 13px 'Courier New', monospace; }
.formula-grid h3 { margin: 7px 0; font-size: 18px; }
.formula-large { padding: 7px 0; border-top: 1px dotted #777; border-bottom: 1px dotted #777; font: bold clamp(17px, 2vw, 24px) 'Courier New', monospace; overflow-wrap: anywhere; }
.formula-grid p { margin: 9px 0 0; font-size: 14px; }
.disclaimer { border: 1px solid #777; background: #ffffe6; padding: 13px; margin-bottom: 35px; }
.disclaimer p { margin: 0; font-size: 14px; }
.site-footer { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 13px 0 25px; border-top: 2px solid #777; color: #444; font: 13px Arial, Helvetica, sans-serif; }
.site-footer .brand { font-size: 13px; color: var(--blue); }
.site-footer .brand-mark { color: var(--blue); font-size: 17px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px; }

@media (max-width: 1000px) {
  .workspace { grid-template-columns: 1fr; }
  .controls-panel { border-right: 0; border-bottom: 2px solid #444; }
}

@media (max-width: 680px) {
  .wrap { width: calc(100% - 24px); }
  .site-header { padding: 10px 12px; }
  .brand { font-size: 14px; }
  .header-link { font-size: 12px; white-space: nowrap; }
  .intro { padding: 24px 0 17px; }
  .intro p { font-size: 15px; }
  .controls-panel, .results-panel { padding: 13px; }
  .object-grid { gap: 8px; }
  .object-card { padding: 9px; }
  .object-card legend { font-size: 14px; }
  .object-card input, .field input { font-size: 16px; }
  .condition-grid { grid-template-columns: 1fr; gap: 6px; }
  .hint { display: none; }
  .result-number { font-size: clamp(29px, 8vw, 46px); }
  .hero-glyph { display: none; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 7px; }
  .formula-grid { grid-template-columns: 1fr; }
  .site-footer { flex-wrap: wrap; }
}

@media (max-width: 410px) {
  .object-grid { grid-template-columns: 1fr; }
  .result-two { grid-template-columns: 1fr; }
  .result-two > div + div { border-left: 0; border-top: 1px solid #777; }
  .metric-grid { grid-template-columns: 1fr; }
  .metric, .metric:nth-child(odd):not(.net), .metric:nth-last-child(-n+2) { border-right: 0; border-bottom: 1px solid #777; }
  .metric:last-child { border-bottom: 0; }
  .metric.net { grid-column: auto; }
  .net-axis { font-size: 10px; }
  .track-caption span:last-child { display: none; }
  .force-comparison th, .force-comparison td { font-size: 12px; }
  .camel-picture { width: 85px; height: 85px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }