/* layout: one editorial column, max 1360px; live chrome hero beside the headline; menu as a ruled list. tokens = betteranatomy Design System */
:root {
  --surface: #E8E8EA; --raised: #F4F4F6; --soft: #DCDCDF; --ink: #0B0B0C; --sub: #3A3A40; --mono-ink: #4A4A50; --muted: #55555C;
  --line: #0B0B0C; --rule: #C9C9CE; --inverse: #0B0B0C; --inverse-ink: #EDEDEF; --inverse-sub: #C8C8CE; --inverse-muted: #B4B4BB;
  --action: #0B0B0C; --action-ink: #F4F4F5;
  --display: "Archivo", system-ui, sans-serif; --mono: "IBM Plex Mono", ui-monospace, monospace;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --surface: #0A0A0B; --raised: #141416; --soft: #141416; --ink: #EDEDEF; --sub: #C8C8CE; --mono-ink: #A2A2AA; --muted: #8C8C94;
  --line: #3A3A40; --rule: #222226; --inverse: #EDEDEF; --inverse-ink: #0B0B0C; --inverse-sub: #3A3A40; --inverse-muted: #55555C;
  --action: #EDEDEF; --action-ink: #0A0A0B; color-scheme: dark } }
:root[data-theme="dark"] {
  --surface: #0A0A0B; --raised: #141416; --soft: #141416; --ink: #EDEDEF; --sub: #C8C8CE; --mono-ink: #A2A2AA; --muted: #8C8C94;
  --line: #3A3A40; --rule: #222226; --inverse: #EDEDEF; --inverse-ink: #0B0B0C; --inverse-sub: #3A3A40; --inverse-muted: #55555C;
  --action: #EDEDEF; --action-ink: #0A0A0B; color-scheme: dark }
[hidden] { display: none !important; }
body { margin: 0; background: var(--surface); color: var(--ink); font-family: var(--display); font-size: 16px; line-height: 1.5; overflow-x: hidden; }
body, body * { transition: background-color .2s ease, color .2s ease, border-color .2s ease; }
a { color: inherit; } a:hover { opacity: .72; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.wrap { max-width: 1360px; margin: 0 auto; padding-left: max(24px, env(safe-area-inset-left, 0px)); padding-right: max(24px, env(safe-area-inset-right, 0px)); }
.mono { font-family: var(--mono); }
.eyebrow { font-family: var(--mono); font-size: 13px; letter-spacing: .04em; text-transform: uppercase; margin: 0; }
header.top { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; padding-block: 24px; }
.word { font-weight: 900; font-size: 22px; letter-spacing: -.03em; text-decoration: none; }
nav.main { display: flex; flex-wrap: wrap; gap: 22px; align-items: center; font-family: var(--mono); font-size: 13px; text-transform: uppercase; letter-spacing: .02em; }
nav.main a { text-decoration: none; }
.pill { border: 1.5px solid var(--line); border-radius: 999px; padding: 10px 16px; text-decoration: none; }
.toggle { width: 44px; height: 44px; border-radius: 999px; border: 1.5px solid var(--line); background: transparent; color: var(--ink); display: inline-grid; place-items: center; cursor: pointer; padding: 0; }
.toggle svg { width: 18px; height: 18px; }
.toggle .sun { display: none; } :root[data-theme="dark"] .toggle .sun { display: block; } :root[data-theme="dark"] .toggle .moon { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .toggle .sun { display: block; } :root:not([data-theme="light"]) .toggle .moon { display: none; } }

.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 24px; align-items: center; padding-block: 12px 0; }
.hero h1 { margin: 18px 0 26px; font-weight: 850; font-stretch: 112%; font-size: clamp(54px, 7.6vw, 124px); line-height: .9; letter-spacing: -.05em; text-wrap: balance; }
.hero p.lede { font-size: 18px; line-height: 1.45; max-width: 36ch; color: var(--sub); margin: 0 0 22px; }
.ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-block; text-decoration: none; padding: 16px 24px; border-radius: 999px; font-weight: 700; font-size: 16px; border: 1.5px solid var(--line); background: transparent; color: var(--ink); cursor: pointer; font-family: var(--display); }
.btn.primary { background: var(--action); color: var(--action-ink); border-color: var(--action); }
.stage { position: relative; aspect-ratio: 1 / 1.05; width: 100%; max-width: 100%; }
.stage canvas { position: absolute; inset: 0; width: 100% !important; height: 100% !important; display: block; }
.stage .cap { position: absolute; left: 0; right: 0; bottom: 4px; text-align: center; font-family: var(--mono); font-size: 11px; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); }
.stage .fallback { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; color: var(--muted); font-family: var(--mono); font-size: 13px; }
.lid-btn { position: absolute; right: 8px; top: 8px; font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; padding: 10px 14px; }

.directives { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1.5px solid var(--line); margin-top: 28px; }
.directives div { padding: 18px 18px 22px 0; font-family: var(--mono); font-size: 12px; line-height: 1.55; color: var(--sub); }
.directives b { display: block; color: var(--ink); font-size: 14px; margin-bottom: 4px; }
.corner { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 8px; font-size: 13px; color: var(--sub); }
.corner b { font-family: var(--mono); color: var(--ink); font-size: 13px; display: block; }

section.block { padding-block: 110px 0; }
h2.big { margin: 14px 0 40px; font-weight: 850; font-stretch: 110%; font-size: clamp(40px, 5vw, 72px); line-height: .95; letter-spacing: -.045em; max-width: 16ch; text-wrap: balance; }
.courses { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); border-top: 1.5px solid var(--line); }
.courses article { padding: 26px 22px 30px 0; border-bottom: 1.5px solid var(--line); }
.courses h3 { margin: 0 0 8px; font-size: 26px; letter-spacing: -.02em; }
.courses p { margin: 0; color: var(--sub); }
.courses .tag { font-family: var(--mono); font-size: 12px; color: var(--mono-ink); margin: 0 0 30px; }

.menu { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: 48px; }
.menu ol { list-style: none; margin: 0; padding: 0; border-top: 1.5px solid var(--line); font-family: var(--mono); }
.menu li { display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; align-items: center; padding: 20px 0; border-bottom: 1.5px solid var(--line); color: var(--muted); }
.menu li b { color: var(--ink); }
.menu li.live { background: var(--soft); margin: 0 -16px; padding: 20px 16px; color: var(--ink); }
.menu li.live span.what { font-family: var(--display); font-size: 15px; }
.menu .open { font-family: var(--display); font-weight: 700; font-size: 15px; background: var(--action); color: var(--action-ink); text-decoration: none; padding: 12px 18px; border-radius: 999px; }

.panels { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; }
.panel { border-radius: 28px; padding: 40px; display: flex; flex-direction: column; gap: 16px; border: 1.5px solid var(--line); }
.panel.inv { background: var(--inverse); color: var(--inverse-ink); border-color: var(--inverse); }
.panel h3 { margin: 0; font-size: 34px; line-height: 1.05; letter-spacing: -.03em; text-wrap: balance; }
.panel p { margin: 0; line-height: 1.55; } .panel.inv p { color: var(--inverse-sub); } .panel.inv .eyebrow, .panel.inv .meta { color: var(--inverse-muted); }
.meta { font-family: var(--mono); font-size: 13px; }
footer.end { padding-block: 110px 48px; display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: flex-end; }
footer .huge { margin: 0; font-weight: 900; font-stretch: 115%; font-size: clamp(56px, 11vw, 170px); line-height: .8; letter-spacing: -.06em; }
footer .legal { max-width: 46ch; font-family: var(--mono); font-size: 11px; line-height: 1.6; color: var(--muted); margin: 0; }

@media (max-width: 860px) {
  .hero { grid-template-columns: minmax(0, 1fr); }
  .stage { max-width: 520px; margin: 0 auto; }
  .directives { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .corner { grid-template-columns: minmax(0, 1fr); }
  .menu { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  nav.main .hide-sm { display: none; }
}
@media (prefers-reduced-motion: reduce) { body, body * { transition: none !important; } }

/* chapter page */
.crumb { font-family: var(--mono); font-size: 13px; text-transform: uppercase; letter-spacing: .04em; text-decoration: none; color: var(--mono-ink); }
.ch-head { padding-block: 48px 8px; }
.ch-head h1 { margin: 14px 0 20px; font-weight: 850; font-stretch: 112%; font-size: clamp(48px, 7vw, 108px); line-height: .9; letter-spacing: -.05em; }
.ch-head p { max-width: 52ch; color: var(--sub); font-size: 18px; margin: 0; }
.sections { list-style: none; margin: 56px 0 0; padding: 0; border-top: 1.5px solid var(--line); }
.sections li { display: grid; grid-template-columns: 120px minmax(0, 1fr) auto; gap: 24px; align-items: center; padding: 28px 0; border-bottom: 1.5px solid var(--line); }
.sections li.live { background: var(--soft); margin: 0 -16px; padding: 28px 16px; }
.sections .code { font-family: var(--mono); font-size: 14px; }
.sections h2 { margin: 0 0 6px; font-size: 30px; letter-spacing: -.03em; }
.sections p { margin: 0; color: var(--sub); }
.sections li:not(.live) h2, .sections li:not(.live) .code { color: var(--muted); }
.sections .soon { font-family: var(--mono); font-size: 12px; text-transform: uppercase; color: var(--muted); }
.inside { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; font-family: var(--mono); font-size: 12px; }
.inside span { border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; }
@media (max-width: 700px) { .sections li { grid-template-columns: minmax(0, 1fr); gap: 10px; } }