:root {
  --paper: #f4f2ed;
  --surface: #fffefa;
  --ink: #10263b;
  --muted: #4d5d68;
  --line: #9ba7ad;
  --rail: #d7d9d6;
  --accent: #176452;
  --accent-dark: #0c493d;
  --signal: #9a5700;
  --danger: #982f32;
  --focus: #075fc7;
  --space-1: .5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --radius: .3rem;
}

* { box-sizing: border-box; }
html { color-scheme: light; scroll-behavior: smooth; background: var(--paper); }
body { margin: 0; min-inline-size: 0; max-inline-size: 100%; color: var(--ink); background: var(--paper); font-family: "Segoe UI Variable", "Segoe UI", sans-serif; font-size: 1rem; line-height: 1.55; }
button, input, textarea, select { min-inline-size: 0; max-inline-size: 100%; font: inherit; }
button, input[type="file"], select { min-block-size: 2.75rem; }
a { color: var(--accent-dark); text-underline-offset: .18em; }
:focus-visible { outline: .2rem solid var(--focus); outline-offset: .2rem; }
.skip-link { position: fixed; inset-block-start: .5rem; inset-inline-start: .5rem; z-index: 20; padding: .65rem 1rem; background: var(--surface); transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.masthead { display: grid; gap: var(--space-2); padding: 1rem max(1.25rem, calc((100% - 78rem) / 2)); color: #fff; background: var(--ink); }
.masthead__copy { min-inline-size: 0; max-inline-size: 58rem; }
.product-mark, .section-index { margin: 0 0 var(--space-1); font-weight: 700; letter-spacing: .02em; }
.product-mark { color: #b9d8cf; }
.masthead__lead { max-inline-size: 72ch; margin: .2rem 0 0; color: #dce6e9; font-size: .95rem; }
h1, h2 { font-family: Georgia, "Times New Roman", serif; }
h1 { max-inline-size: 20ch; margin: 0; font-size: clamp(1.9rem, .95rem + 4.4vw, 4.4rem); font-weight: 700; letter-spacing: -.035em; line-height: 1.02; overflow-wrap: break-word; }
.masthead h1 { font-family: "Segoe UI Variable", "Segoe UI", sans-serif; font-size: 1.35rem; letter-spacing: -.01em; line-height: 1.2; }
h2, h3, p { margin-block-start: 0; }
h2 { margin-block-end: var(--space-2); font-size: clamp(1.55rem, 3vw, 2.35rem); line-height: 1.15; }
h3 { font-size: 1.18rem; }
.service-state { display: flex; align-items: center; gap: .6rem; margin: 0; align-self: end; }
.state-dot { inline-size: .8rem; block-size: .8rem; flex: 0 0 auto; border: 2px solid currentColor; border-radius: 50%; background: #d79735; }
.section-nav { position: sticky; inset-block-start: 0; z-index: 9; max-inline-size: 100%; padding-inline: max(1rem, calc((100% - 78rem) / 2)); overflow-x: auto; border-block-end: 1px solid var(--line); background: color-mix(in srgb, var(--surface) 96%, transparent); }
.section-tabs { display: flex; min-inline-size: max-content; gap: .15rem; }
.section-nav__link { flex: 0 0 auto; min-inline-size: 0; min-block-size: 3rem; padding: .65rem .9rem; border: 0; border-block-end: .22rem solid transparent; border-radius: 0; color: var(--ink); background: transparent; font-weight: 650; overflow-wrap: anywhere; }
.section-nav__link:hover { border-block-end-color: var(--line); }
.section-nav__link[aria-selected="true"] { border-block-end-color: var(--accent); color: var(--accent-dark); background: var(--surface); }
.workspace { inline-size: 100%; min-inline-size: 0; max-inline-size: 78rem; margin-inline: auto; }
.workspace-intro { padding: var(--space-2) clamp(1.25rem, 4vw, 3rem); border-block-end: 1px solid var(--line); background: var(--surface); }
.context-strip { display: flex; min-inline-size: 0; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .3rem var(--space-2); }
.context-strip p { margin: 0; overflow-wrap: anywhere; }
.context-strip__hint { color: var(--muted); font-size: .92rem; }
.inline-action { min-block-size: 2rem; padding: .1rem .3rem; border: 0; color: var(--accent-dark); background: transparent; font-weight: 650; text-decoration: underline; text-underline-offset: .18em; }
.method-disclosure { margin-block-start: .35rem; }
.method-disclosure > summary { min-block-size: 2.5rem; padding-block: .35rem; color: var(--accent-dark); }
.method-disclosure[open] > #help-panel { padding-block: var(--space-2) var(--space-3); }
.workspace-panel[hidden], [hidden] { display: none !important; }
.product-section { min-inline-size: 0; padding: clamp(2rem, 5vw, 4.5rem) clamp(1.25rem, 4vw, 3rem); scroll-margin-block-start: 4.5rem; border-block-end: 1px solid var(--line); }
.product-section:nth-child(even) { background: var(--surface); }
.section-index { color: var(--accent-dark); font-size: .9rem; }
.overview { display: grid; gap: var(--space-4); align-items: start; }
.overview > div { min-inline-size: 0; max-inline-size: 42rem; }
.pipeline { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; counter-reset: stage; }
.pipeline li { position: relative; display: grid; min-inline-size: 0; grid-template-columns: minmax(7rem, .7fr) minmax(0, 1fr); gap: var(--space-2); padding: .8rem 0 .8rem 2rem; border-block-start: 1px solid var(--line); counter-increment: stage; }
.pipeline li::before { position: absolute; inset-inline-start: 0; content: counter(stage); color: var(--accent-dark); font-variant-numeric: tabular-nums; font-weight: 700; }
.pipeline strong, .pipeline span, .field-note, .section-heading p { min-inline-size: 0; overflow-wrap: anywhere; }
.pipeline span, .field-note, .section-heading p { color: var(--muted); }
.calculation-grid { display: grid; gap: var(--space-4); }
.launch-panel, .job-panel { min-inline-size: 0; padding: 0; }
.job-panel { padding-block-start: var(--space-3); border-block-start: 2px solid var(--ink); }
.section-heading { max-inline-size: 44rem; }
fieldset { min-inline-size: 0; margin: var(--space-3) 0; padding: 0; border: 0; }
legend { margin-block-end: var(--space-1); font-weight: 700; }
.mode-option { display: grid; grid-template-columns: 1.5rem 1fr; gap: .75rem; padding-block: .8rem; border-block-end: 1px solid var(--rail); cursor: pointer; }
.mode-option input { inline-size: 1.25rem; block-size: 1.25rem; margin-block-start: .2rem; accent-color: var(--accent); }
.mode-option strong, .mode-option small { display: block; }
.mode-option small { color: var(--muted); }
.scope-fields { display: grid; gap: var(--space-1); margin-block: var(--space-3); padding: var(--space-2); border-inline-start: .3rem solid var(--signal); background: #f0f2ef; }
.scope-fields label { font-weight: 700; }
.scope-kind, .scope-fabrics { display: flex; flex-wrap: wrap; gap: .75rem 1.25rem; padding: .75rem; border: 1px solid var(--line); }
.scope-kind label, .scope-fabrics label { display: inline-flex; align-items: center; gap: .4rem; }
.field-note { margin: 0; }
.form-actions { display: flex; flex-wrap: wrap; gap: .75rem; }
button { border: 2px solid var(--accent-dark); border-radius: var(--radius); padding: .55rem 1rem; color: var(--ink); background: var(--surface); cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .48; }
.primary-action { color: #fff; background: var(--accent); font-weight: 700; }
.primary-action:hover { background: var(--accent-dark); }
.quiet-action { color: var(--danger); border-color: var(--danger); }
.steps { display: grid; gap: .4rem; margin: var(--space-3) 0; padding: 0; list-style: none; }
.steps li { display: grid; grid-template-columns: minmax(8rem, 1fr) auto; gap: var(--space-2); padding: .7rem 0; border-block-end: 1px solid var(--line); }
.step-state { color: var(--muted); font-variant-numeric: tabular-nums; }
.step-state[data-status="succeeded"] { color: var(--accent-dark); }
.step-state[data-status="failed"], .step-state[data-status="interrupted"] { color: var(--danger); font-weight: 700; }
.artifacts { margin-block: var(--space-3); padding-block-start: var(--space-2); border-block-start: 2px solid var(--ink); }
.artifacts ul { padding-inline-start: 1.2rem; }
details { margin-block-start: var(--space-3); }
summary { min-block-size: 2.75rem; padding-block: .55rem; cursor: pointer; font-weight: 700; }
pre { max-block-size: 18rem; overflow: auto; padding: var(--space-2); color: #eef5f2; background: #243640; white-space: pre-wrap; overflow-wrap: anywhere; }
.source-list, .difference-list { display: grid; grid-template-columns: minmax(7rem, auto) minmax(0, 1fr); gap: .6rem var(--space-2); max-inline-size: 52rem; }
.source-list dt, .difference-list dt { font-weight: 700; }
.source-list dd, .difference-list dd { margin: 0; }
.basket-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; padding: 1px; background: var(--line); list-style-position: inside; }
.basket-list li { padding: var(--space-2); background: var(--surface); font-weight: 700; }
.help-lead { max-inline-size: 70ch; font-size: 1.1rem; }
.deferred-note { max-inline-size: 52rem; margin-block-start: var(--space-4); padding: var(--space-3); border: 2px dashed var(--line); background: #eef0ed; }
.help-intro { display: grid; gap: .25rem; max-inline-size: 68rem; margin-block-end: var(--space-3); }
.help-intro p { margin: 0; }
.help-kicker, .help-scene__eyebrow { color: var(--accent-dark); font-size: .82rem; font-weight: 750; letter-spacing: .07em; text-transform: uppercase; }
.help-stepper { display: flex; min-inline-size: 0; margin: 0 0 var(--space-3); padding: 0 0 .45rem; overflow-x: auto; list-style: none; scrollbar-width: thin; }
.help-stepper li { display: flex; flex: 0 0 auto; align-items: center; }
.help-stepper__button { inline-size: 2.75rem; min-inline-size: 2.75rem; padding: 0; border-radius: 50%; font-variant-numeric: tabular-nums; font-weight: 750; }
.help-stepper__button[aria-current="step"] { color: #fff; border-color: var(--accent); background: var(--accent); }
.help-stepper__transition { inline-size: clamp(3rem, 7vw, 6rem); padding-inline: .35rem; color: var(--muted); font-size: .72rem; line-height: 1.15; text-align: center; }
.help-stepper__transition::after { display: block; margin-block-start: .3rem; content: "→"; color: var(--accent-dark); font-size: 1rem; }
.help-stage { min-inline-size: 0; }
.help-scene { position: relative; min-inline-size: 0; padding: clamp(1.25rem, 4vw, 2.5rem); border: 1px solid var(--ink); border-block-start: .4rem solid var(--accent); background: var(--surface); box-shadow: .5rem .5rem 0 var(--rail); }
.help-scene__heading { display: grid; grid-template-columns: 1fr auto; gap: 0 var(--space-2); align-items: baseline; }
.help-scene__heading h3 { grid-column: 1 / -1; max-inline-size: 28ch; margin-block: .2rem var(--space-2); font-family: Georgia, "Times New Roman", serif; font-size: clamp(1.45rem, 4vw, 2.35rem); line-height: 1.08; }
.help-scene__eyebrow { margin: 0; }
.help-scene__count { color: var(--muted); font-variant-numeric: tabular-nums; }
.help-scene__summary { max-inline-size: 68ch; font-size: 1.08rem; }
.help-visual { min-inline-size: 0; margin: var(--space-3) 0 0; }
.help-visual__row { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr); gap: .55rem; align-items: stretch; }
.help-visual__fact { display: grid; align-content: center; min-block-size: 6rem; min-inline-size: 0; padding: var(--space-2); border: 1px solid var(--line); background: #eef2ee; text-align: center; }
.help-visual__fact strong { overflow-wrap: anywhere; color: var(--accent-dark); font-size: clamp(1rem, 2.5vw, 1.35rem); }
.help-visual__label { color: var(--muted); font-size: .78rem; letter-spacing: .04em; text-transform: uppercase; }
.help-visual__arrow { align-self: center; color: var(--accent-dark); font-size: 1.4rem; }
.help-visual figcaption { max-inline-size: 70ch; margin-block-start: var(--space-2); color: var(--muted); }
.help-scene__transition { margin: var(--space-3) 0 0; padding-block-start: var(--space-2); border-block-start: 1px solid var(--rail); color: var(--accent-dark); font-weight: 700; }
.help-scene__transition::after { content: "  →"; }
.help-controls { display: flex; flex-wrap: wrap; gap: .7rem; margin-block-start: var(--space-3); }
.help-all-toggle { margin-inline-start: auto; }
.help-all-scenes { display: grid; gap: var(--space-4); }
.help-scene--compact { box-shadow: none; }
.help-text-version, .help-reference, .help-outcomes { max-inline-size: 70rem; margin-block-start: var(--space-4); }
.help-text-version ol { display: grid; gap: var(--space-2); padding-inline-start: 1.5rem; }
.help-text-version li { padding-inline-start: .5rem; }
.help-text-version li p { margin: .2rem 0 0; color: var(--muted); }
.help-reference__grid { display: grid; gap: var(--space-3); }
.help-outcomes { padding: var(--space-3); border-inline-start: .35rem solid var(--signal); background: #fff8e8; }
.help-outcomes h3 { margin-block-end: var(--space-2); }
.related-results { display: grid; gap: var(--space-4); }
.traction-first { background: var(--surface); }
.sr-only { position: absolute; inline-size: 1px; block-size: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (min-width: 56rem) {
  .masthead { grid-template-columns: 1fr auto; }
  .overview { grid-template-columns: minmax(0, 1fr) minmax(22rem, .8fr); }
  .calculation-grid { grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); }
  .related-results { grid-template-columns: minmax(0, 3fr) minmax(18rem, 2fr); align-items: start; }
  .job-panel { padding-block-start: 0; padding-inline-start: var(--space-4); border-block-start: 0; border-inline-start: 1px solid var(--line); }
  .help-reference__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 36rem) {
  .steps li, .source-list, .difference-list, .basket-list, .pipeline li { grid-template-columns: minmax(0, 1fr); }
  .section-nav { position: static; overflow-x: auto; }
  .help-visual__row { grid-template-columns: minmax(0, 1fr); }
  .help-visual__arrow { transform: rotate(90deg); justify-self: center; }
  .help-all-toggle { margin-inline-start: 0; }
  .help-scene { box-shadow: .3rem .3rem 0 var(--rail); }
}

@media (prefers-reduced-motion: no-preference) {
  .skip-link, button, .section-nav__link, .help-scene { transition: background-color 160ms ease-out, transform 160ms ease-out, text-decoration-color 160ms ease-out, opacity 160ms ease-out; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .help-scene { transition: none; }
}