/* Whitebox Academy. Black ink on white paper, one orange accent. */
:root {
  --ink: #0b0d10;
  --paper: #ffffff;
  --wash: #f5f6f7;
  --muted: #4a5059;
  --rule: #d5d9de;
  --rule-strong: #c4cad1;
  --dash: #6b727c;
  --grid-line: #eceef1;
  --on-ink-muted: #a3a9b2;
  --on-ink-rule: #2b2f36;
  --on-ink-grid: #171a1f;
  --accent: #ff4f00;
  --sans: "Inter Tight", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  --gutter: 32px;
  --section: 112px;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 17px; line-height: 1.55; }
[id] { scroll-margin-top: 88px; }
h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
h1, h2 { font-weight: 800; letter-spacing: -0.04em; line-height: 1; text-wrap: balance; }
h2 { font-size: clamp(36px, 4.8vw, 64px); }
h3 { font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; }
a { color: inherit; }
a:hover { color: var(--muted); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.wrap { max-width: 1280px; margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section); }
.section.wash { background: var(--wash); border-block: 1px solid var(--rule); }
.grid-bg { background-color: var(--paper); background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px); background-size: 32px 32px; }
.dark { background-color: var(--ink); color: var(--paper); }
.dark a:hover { color: var(--on-ink-muted); }
.dark.grid-bg { background-image: linear-gradient(var(--on-ink-grid) 1px, transparent 1px), linear-gradient(90deg, var(--on-ink-grid) 1px, transparent 1px); }
.lede { color: var(--muted); font-size: 21px; line-height: 1.5; max-width: 580px; }
.dark .lede { color: var(--on-ink-muted); }
.eyebrow { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; font: 500 12px/1.4 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 10px; height: 10px; background: var(--accent); }
.section-head { margin-bottom: 48px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; font: 500 12px/1.4 var(--mono); letter-spacing: 0.02em; text-transform: uppercase; }
.tag { padding: 5px 9px; border: 1px solid var(--ink); background: var(--paper); color: var(--ink); }
.tag.hot { border-color: var(--accent); background: var(--accent); font-weight: 700; }
.dark .tag.quiet, .tag.quiet { border-color: var(--rule); background: transparent; color: inherit; }

.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 22px; border: 1.5px solid var(--ink); background: var(--paper); color: var(--ink); font: 600 16px/1.2 var(--sans); text-decoration: none; cursor: pointer; }
.button:hover { background: var(--wash); color: var(--ink); }
.button.solid { background: var(--ink); color: var(--paper); box-shadow: 5px 5px 0 var(--accent); }
.button.solid:hover { background: #2b2f36; color: var(--paper); }
.dark .button { border-color: var(--paper); background: transparent; color: var(--paper); }
.dark .button:hover { background: var(--on-ink-rule); color: var(--paper); }
.dark .button.hot { border-color: var(--accent); background: var(--accent); color: var(--ink); }
.dark .button.hot:hover { border-color: var(--paper); background: var(--paper); color: var(--ink); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; }
.text-link { display: inline-flex; align-items: center; min-height: 44px; font-weight: 600; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; background: var(--paper); border-bottom: 1px solid var(--rule); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 12px; }
.brand { display: flex; align-items: center; gap: 12px; min-height: 44px; font-size: 18px; font-weight: 700; letter-spacing: -0.02em; text-decoration: none; }
.brand i { position: relative; display: block; width: 24px; height: 24px; border: 2px solid var(--ink); }
.brand i::after { content: ""; position: absolute; top: -7px; right: -7px; width: 12px; height: 12px; background: var(--accent); }
.site-nav { display: flex; align-items: center; gap: 4px; font: 500 13px/1.2 var(--mono); }
.site-nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px; text-decoration: none; }
.site-nav a:hover { text-decoration: underline; color: var(--ink); }
.site-nav .nav-cta { margin-left: 6px; padding: 0 18px; background: var(--ink); color: var(--paper); font: 600 14px/1.2 var(--sans); }
.site-nav .nav-cta:hover { color: var(--paper); background: #2b2f36; }
.menu-button { display: none; min-width: 44px; min-height: 44px; padding: 0 12px; border: 1.5px solid var(--ink); background: var(--paper); color: var(--ink); font: 700 13px/1 var(--mono); cursor: pointer; }

/* Sign-up form, hidden until a provider is set in site.js */
.signup { display: grid; gap: 10px; width: 100%; max-width: 540px; }
.signup label { font: 500 12px/1.4 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; }
.signup-row { display: flex; flex-wrap: wrap; border: 1.5px solid var(--ink); background: var(--paper); box-shadow: 5px 5px 0 var(--accent); }
.signup input { flex: 1 1 220px; min-width: 0; min-height: 52px; padding: 0 16px; border: 0; background: var(--paper); color: var(--ink); font: 400 16px var(--sans); }
.signup input::placeholder { color: var(--dash); }
.signup button { min-height: 52px; padding: 0 22px; border: 0; background: var(--ink); color: var(--paper); font: 600 16px var(--sans); cursor: pointer; }
.dark .signup-row { border-color: var(--paper); box-shadow: none; }
.dark .signup button { background: var(--accent); color: var(--ink); font-weight: 700; }

/* Home: hero */
.hero { border-bottom: 1px solid var(--rule); }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); align-items: center; gap: 64px; padding-block: 96px 104px; }
.hero-copy { display: grid; gap: 28px; justify-items: start; }
.hero h1 { font-size: clamp(56px, 7.4vw, 112px); line-height: 0.92; letter-spacing: -0.045em; }
.hero h1 span { display: inline-block; margin-top: 0.08em; padding: 0.02em 0.16em 0.08em; background: var(--ink); color: var(--paper); transform: rotate(-2deg); }

.exploded { display: flex; flex-direction: column; padding: 28px 28px 32px; border: 1.5px solid var(--ink); background: var(--paper); font-family: var(--mono); }
.exploded-title { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 28px; padding-bottom: 24px; border-bottom: 1px dashed var(--rule); color: var(--muted); font-size: 11px; letter-spacing: 0.08em; }
.lid { display: flex; justify-content: space-between; gap: 12px; padding: 16px 20px; background: var(--ink); color: var(--paper); font-size: 13px; transform: rotate(-3.5deg) translateY(-6px); }
.lid span:last-child { color: var(--on-ink-muted); }
.link { height: 22px; margin-left: 44px; border-left: 2px dashed var(--accent); }
.link.first { height: 36px; }
.layer { display: flex; align-items: center; gap: 16px; padding: 16px 18px; border: 1.5px solid var(--ink); box-shadow: 6px 6px 0 var(--ink); font-size: 17px; font-weight: 700; }
.layer b { padding: 4px 7px; background: var(--accent); font-size: 12px; }
.layer.two { margin-left: 24px; }
.layer.three { margin-left: 48px; }
.link.two { margin-left: 68px; }
.equation { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 12px; margin-top: 36px; padding-top: 20px; border-top: 1px dashed var(--rule); font-size: 18px; font-weight: 500; }
.equation small { color: var(--muted); font-size: 11px; letter-spacing: 0.06em; }

/* Home: courses. To add a course, copy one .course-card. */
.split-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 48px; }
.split-head > p { max-width: 380px; color: var(--muted); }
.split-head .eyebrow + h2 { margin: 0; }
.course-card { position: relative; display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); border: 1.5px solid var(--ink); box-shadow: 8px 8px 0 var(--ink); transition: box-shadow 120ms; }
.course-card:hover { box-shadow: 8px 8px 0 var(--accent); }
.course-card + .course-card { margin-top: 40px; }
.course-main { display: grid; gap: 20px; justify-items: start; padding: 40px; }
.course-main h3 { font-size: clamp(30px, 3.4vw, 44px); font-weight: 800; letter-spacing: -0.035em; line-height: 1.05; }
.course-main h3 a { text-decoration: none; }
.course-main h3 a::after { content: ""; position: absolute; inset: 0; }
.course-main > p { max-width: 560px; color: var(--muted); font-size: 18px; }
.course-facts { display: flex; flex-wrap: wrap; gap: 8px 28px; font: 400 14px/1.4 var(--mono); }
.course-more { font-weight: 700; }
.route { display: flex; flex-direction: column; justify-content: center; gap: 8px; padding: 32px; background: var(--ink); color: var(--paper); font: 400 13px/1.5 var(--mono); }
.route h4 { margin: 0 0 8px; color: var(--on-ink-muted); font: inherit; }
.route ol { display: grid; gap: 8px; }
.route li { display: flex; gap: 14px; }
.route li:last-child { color: var(--accent); font-weight: 700; }
.idea { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px 24px; margin-top: 40px; padding: 24px 32px; border: 1.5px dashed var(--dash); }
.idea h3 { font-size: 22px; }
.idea p { color: var(--muted); font-size: 16px; }

/* Home: why and method */
.compare { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border: 1.5px solid var(--ink); }
.compare > div { padding: 44px; }
.compare .grid-bg { background-size: 24px 24px; }
.compare h3 { margin-bottom: 20px; font-size: 28px; }
.compare ul { font-size: 18px; line-height: 1.4; border-bottom: 1px solid var(--rule); }
.compare li { padding: 14px 0; border-top: 1px solid var(--rule); }
.compare .dark ul, .compare .dark li { border-color: var(--on-ink-rule); }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1.5px solid var(--ink); }
.steps > div { display: grid; gap: 12px; align-content: start; padding: 32px 32px 32px 0; border-bottom: 1px solid var(--rule); }
.steps span { color: var(--muted); font: 400 13px/1.4 var(--mono); }
.steps h3 { font-size: 28px; }
.steps p { color: var(--muted); }
.dark .steps, .dark .steps > div { border-color: var(--on-ink-rule); }
.dark .steps span, .dark .steps p { color: var(--on-ink-muted); }
.licenses { margin-top: 32px; }

/* Home: Kautuhal Lab */
.kids { border-top: 1px solid var(--rule); }
.kids .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 32px; padding-block: 72px; }
.kids-copy { display: grid; gap: 12px; max-width: 680px; }
.kids small { color: var(--muted); font: 400 12px/1.4 var(--mono); letter-spacing: 0.08em; }
.kids h2 { font-size: 40px; letter-spacing: -0.03em; }
.kids h2 span { margin-left: 8px; color: var(--muted); font-size: 17px; font-weight: 600; letter-spacing: 0; white-space: nowrap; }
.kids p { color: var(--muted); font-size: 18px; }

/* End call to action */
.closing .wrap { display: grid; gap: 28px; justify-items: start; padding-block: 120px; }
.closing h2 { max-width: 960px; font-size: clamp(42px, 6vw, 84px); line-height: 0.95; letter-spacing: -0.045em; }

.site-footer { border-top: 1.5px solid var(--ink); font: 400 13px/1.5 var(--mono); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px 16px; padding-block: 20px; }
.site-footer nav { display: flex; flex-wrap: wrap; }
.site-footer a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px; }
.site-footer nav a:last-child { padding-right: 0; }

.sticky-cta { display: none; }

/* Course page */
.course-hero { border-bottom: 1px solid var(--rule); }
.course-hero > .wrap { padding-block: 24px 96px; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 48px; font: 400 13px/1.4 var(--mono); }
.breadcrumb a { display: inline-flex; align-items: center; min-height: 44px; }
.breadcrumb span { color: var(--muted); }
.course-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 400px); align-items: start; gap: 56px; }
.course-hero-copy { display: grid; gap: 28px; justify-items: start; }
.course-hero h1 { font-size: clamp(46px, 6.2vw, 92px); line-height: 0.95; letter-spacing: -0.045em; }
.panel { border: 1.5px solid var(--ink); background: var(--paper); }
.progress { display: grid; gap: 12px; padding: 22px; border-bottom: 1.5px solid var(--ink); }
.progress-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; font: 500 12px/1.4 var(--mono); letter-spacing: 0.04em; }
.progress-track { height: 10px; border: 1.5px solid var(--ink); }
.progress-track div { width: 0; height: 100%; background: var(--accent); }
.progress p { color: var(--muted); font-size: 15px; }
.progress strong { color: var(--ink); }
.panel dl { font-family: var(--mono); }
.panel dl div { display: flex; justify-content: space-between; gap: 16px; padding: 14px 22px; border-bottom: 1px solid var(--rule); }
.panel dl div:last-child { border-bottom: 0; }
.panel dt { color: var(--muted); font-size: 12px; letter-spacing: 0.06em; }
.panel dd { font-size: 15px; font-weight: 700; text-align: right; }

.outcomes { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; border: 1.5px solid var(--ink); background: var(--rule-strong); }
.outcomes > div { display: grid; gap: 10px; align-content: start; padding: 28px; background: var(--paper); }
.outcomes span { color: var(--muted); font: 400 12px/1.4 var(--mono); }
.outcomes h3 { font-size: 22px; }
.outcomes p { color: var(--muted); font-size: 16px; }
.outcomes .dark { background: var(--ink); }
.outcomes .dark span { color: var(--accent); font-weight: 700; }
.outcomes .dark p { color: var(--on-ink-muted); }

.fit { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px; }
.fit h2 { font-size: 40px; letter-spacing: -0.035em; line-height: 1.05; }
.fit ul { font-size: 18px; line-height: 1.45; border-bottom: 1px solid var(--rule-strong); }
.fit li { display: flex; gap: 16px; padding: 18px 0; border-top: 1px solid var(--rule-strong); }
.fit li b { flex: 0 0 36px; font: 700 15px/1.7 var(--mono); }

.parts { border-top: 1.5px solid var(--ink); }
.parts li { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 32px; padding: 26px 0; border-bottom: 1px solid var(--rule); }
.part-number { width: 56px; font: 700 28px/1 var(--mono); }
.parts li > div { flex: 1 1 360px; min-width: 0; }
.parts h3 { margin-bottom: 6px; font-size: 22px; }
.parts p { color: var(--muted); font-size: 16px; }
.status { padding: 6px 10px; border: 1px solid var(--dash); color: var(--muted); font: 700 12px/1.3 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; }
.status.released { border-color: var(--accent); background: var(--accent); color: var(--ink); }
.status.next { border-color: var(--ink); background: var(--ink); color: var(--paper); }

.faq { max-width: 960px; }
.faq-list { border-top: 1.5px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary { padding: 22px 0; font-size: 19px; font-weight: 600; cursor: pointer; }
.faq details p { margin-bottom: 22px; color: var(--muted); }

@media (max-width: 1000px) {
  .hero .wrap, .course-hero-grid { grid-template-columns: minmax(0, 1fr); }
  .outcomes { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  :root { --gutter: 20px; --section: 56px; }
  [id] { scroll-margin-top: 72px; }
  .lede { font-size: 18px; }
  .section-head, .split-head { margin-bottom: 24px; }
  .js .menu-button { display: block; }
  .site-header .wrap { padding-block: 10px; }
  .site-nav { flex-wrap: wrap; }
  .js .site-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 20px 20px; background: var(--paper); border-block: 1px solid var(--rule); font: 700 22px/1.2 var(--sans); }
  .js .site-nav.open { display: flex; }
  .js .site-nav a { justify-content: space-between; min-height: 56px; padding: 0; border-bottom: 1px solid var(--rule); }
  .js .site-nav .nav-cta { justify-content: center; margin: 16px 0 0; border: 0; font: 600 16px/1.2 var(--sans); }

  .hero .wrap { gap: 40px; padding-block: 44px 48px; }
  .hero-copy { gap: 22px; }
  .exploded { padding: 20px; }
  .link { margin-left: 32px; }
  .link.two { margin-left: 46px; }
  .layer.two { margin-left: 14px; }
  .layer.three { margin-left: 28px; }
  .equation { margin-top: 26px; font-size: 15px; }

  .course-card { grid-template-columns: minmax(0, 1fr); box-shadow: 6px 6px 0 var(--ink); }
  .course-main { padding: 22px; }
  .route { padding: 22px; }
  .idea { padding: 20px; }
  .compare, .steps, .fit { grid-template-columns: minmax(0, 1fr); }
  .compare > div { padding: 24px; }
  .steps > div { padding: 18px 0; }
  .fit { gap: 16px; }
  .fit h2 { font-size: 30px; }
  .fit ul { font-size: 16px; }
  .fit li { padding: 14px 0; }
  .kids .wrap { gap: 20px; padding-block: 40px; }
  .kids h2 { font-size: 32px; }
  .kids h2 span { display: block; margin: 6px 0 0; font-size: 15px; }
  .closing .wrap { gap: 20px; padding-block: 64px; }

  .course-hero > .wrap { padding-block: 8px 44px; }
  .breadcrumb { margin-bottom: 12px; }
  .course-hero-grid { gap: 28px; }
  .outcomes { grid-template-columns: minmax(0, 1fr); }
  .outcomes > div { padding: 20px; }
  .parts li { display: grid; grid-template-columns: 30px minmax(0, 1fr); align-items: start; gap: 10px 14px; padding: 18px 0; }
  .part-number { width: auto; font-size: 18px; line-height: 1.3; }
  .status { grid-column: 2; justify-self: start; font-size: 11px; }
  .faq summary { padding: 18px 0; font-size: 17px; }

  .sticky-cta { position: sticky; bottom: 0; z-index: 15; display: flex; align-items: center; gap: 12px; padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px)); border-top: 1.5px solid var(--ink); background: var(--paper); }
  .sticky-cta span { flex: 1; color: var(--muted); font-size: 14px; line-height: 1.3; }
  .sticky-cta strong { color: var(--ink); }
  .sticky-cta a { display: flex; align-items: center; min-height: 46px; padding: 0 18px; background: var(--ink); color: var(--paper); font-size: 15px; font-weight: 700; text-decoration: none; white-space: nowrap; }
}

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