/* Game Engine I orientation.
   Shape rule: 6px for content surfaces, 4px for compact controls. */

html.game-engine-ot-root {
  scroll-behavior: auto;
}

body.course-game-engine-1.game-engine-ot {
  --ot-rule: color-mix(in srgb, var(--accent) 28%, var(--line));
  --ot-rule-strong: color-mix(in srgb, var(--accent) 46%, var(--line-strong));
  --ot-tint: color-mix(in srgb, var(--accent-soft) 54%, var(--paper));
  --ot-tint-soft: color-mix(in srgb, var(--accent-soft) 30%, var(--paper));
  --ot-success: var(--success-ink);
  --ot-label-size: 11.5px;
  --ot-caption-size: 12.5px;
  --ot-small-text-size: 13.5px;
  background: var(--bg);
}

body.course-game-engine-1.game-engine-ot [id] {
  scroll-margin-top: 94px;
}

body.course-game-engine-1.game-engine-ot a:focus-visible,
body.course-game-engine-1.game-engine-ot button:focus-visible,
body.course-game-engine-1.game-engine-ot input:focus-visible,
body.course-game-engine-1.game-engine-ot summary:focus-visible,
body.course-game-engine-1.game-engine-ot [tabindex="0"]:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 62%, transparent);
  outline-offset: 3px;
}

body.course-game-engine-1.game-engine-ot .lesson-header {
  background: color-mix(in srgb, var(--paper) 96%, transparent);
}

body.course-game-engine-1.game-engine-ot .lesson-breadcrumb,
body.course-game-engine-1.game-engine-ot .lesson-sequence a,
body.course-game-engine-1.game-engine-ot .ot-hero .eyebrow,
body.course-game-engine-1.game-engine-ot .ot-toc .toc-title {
  font-size: var(--ot-label-size);
}

body.course-game-engine-1.game-engine-ot .ot-hero {
  background: var(--paper);
}

body.course-game-engine-1.game-engine-ot .ot-hero .hero-inner {
  min-height: min(650px, calc(100dvh - 58px));
  padding: clamp(44px, 7vh, 74px) 0;
  grid-template-columns: minmax(330px, 0.78fr) minmax(480px, 1.22fr);
  gap: clamp(42px, 5vw, 68px);
  align-items: center;
}

body.course-game-engine-1.game-engine-ot .ot-hero-copy {
  min-width: 0;
}

body.course-game-engine-1.game-engine-ot .ot-hero .eyebrow {
  margin-bottom: 17px;
  letter-spacing: 0.07em;
}

body.course-game-engine-1.game-engine-ot .ot-hero h1 {
  max-width: 500px;
  font-size: clamp(42px, 4.7vw, 58px);
  font-weight: 790;
  letter-spacing: -0.058em;
  line-height: 1.04;
}

body.course-game-engine-1.game-engine-ot .ot-hero .lead {
  max-width: 430px;
  margin-top: 21px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.64;
}

body.course-game-engine-1.game-engine-ot .hero-actions {
  margin-top: 27px;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

body.course-game-engine-1.game-engine-ot .hero-action {
  min-height: 44px;
  padding: 10px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-strong);
  font-size: 13px;
  font-weight: 720;
  line-height: 1.2;
  white-space: nowrap;
  transition: border-color 150ms ease, background-color 150ms ease, color 150ms ease, transform 120ms var(--ease-out);
}

body.course-game-engine-1.game-engine-ot .hero-action:active {
  transform: scale(0.98);
}

body.course-game-engine-1.game-engine-ot .hero-action-primary {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
  color: var(--paper);
}

body.course-game-engine-1.game-engine-ot .ot-hero-visual {
  min-width: 0;
  margin: 0;
  border: 1px solid var(--ot-rule-strong);
  border-radius: 6px;
  overflow: hidden;
  background: var(--surface);
  box-shadow: 0 26px 64px color-mix(in srgb, var(--accent-strong) 13%, transparent);
}

body.course-game-engine-1.game-engine-ot .ot-hero-visual img {
  width: 100%;
  height: auto;
  border: 0;
  border-radius: 0;
  display: block;
}

body.course-game-engine-1.game-engine-ot .layout,
body.course-game-engine-1.game-engine-ot main.layout {
  padding: 76px 0 124px;
  grid-template-columns: minmax(0, 820px) minmax(210px, 240px);
  gap: clamp(52px, 7vw, 86px);
}

body.course-game-engine-1.game-engine-ot .article {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  word-break: keep-all;
  overflow-wrap: break-word;
}

body.course-game-engine-1.game-engine-ot .article p,
body.course-game-engine-1.game-engine-ot .article li,
body.course-game-engine-1.game-engine-ot .article td,
body.course-game-engine-1.game-engine-ot .article th {
  word-break: keep-all;
  overflow-wrap: break-word;
}

body.course-game-engine-1.game-engine-ot mark {
  background: #ffe34a;
  color: #0d110e;
  padding: 0.05em 0.12em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

body.course-game-engine-1.game-engine-ot .article > .ot-section,
body.course-game-engine-1.game-engine-ot .article > .stop-line {
  margin-top: 94px;
}

body.course-game-engine-1.game-engine-ot .article > .arrival {
  margin-top: 0;
}

body.course-game-engine-1.game-engine-ot .section-heading {
  max-width: none;
  margin-bottom: 30px;
}

body.course-game-engine-1.game-engine-ot .section-heading mark {
  white-space: nowrap;
}

body.course-game-engine-1.game-engine-ot .section-heading h2,
body.course-game-engine-1.game-engine-ot .arrival h2 {
  margin: 0;
  padding: 0;
  border: 0;
  display: block;
  color: var(--ink-strong);
  font-size: clamp(28px, 3.3vw, 39px);
  font-weight: 770;
  letter-spacing: -0.045em;
  line-height: 1.17;
}

body.course-game-engine-1.game-engine-ot .section-heading h2::before,
body.course-game-engine-1.game-engine-ot .arrival h2::before {
  content: none;
  display: none;
}

body.course-game-engine-1.game-engine-ot .section-heading > p,
body.course-game-engine-1.game-engine-ot .arrival-heading > p {
  max-width: 64ch;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.74;
}

body.course-game-engine-1.game-engine-ot .section-heading > p {
  max-width: none;
}

body.course-game-engine-1.game-engine-ot .article h3 {
  margin: 42px 0 14px;
  color: var(--ink-strong);
  font-size: 21px;
  font-weight: 740;
  letter-spacing: -0.025em;
  line-height: 1.35;
}

body.course-game-engine-1.game-engine-ot .article h4 {
  color: var(--ink-strong);
  font-weight: 720;
}

body.course-game-engine-1.game-engine-ot .arrival {
  padding-bottom: 70px;
  border-bottom: 1px solid var(--ot-rule);
  display: grid;
  grid-template-columns: minmax(190px, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(36px, 6vw, 68px);
  align-items: start;
}

body.course-game-engine-1.game-engine-ot .arrival-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

body.course-game-engine-1.game-engine-ot .arrival-list li {
  margin: 0;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.65;
}

body.course-game-engine-1.game-engine-ot .arrival-list strong {
  color: var(--ink-strong);
}

body.course-game-engine-1.game-engine-ot .stop-line {
  padding: 22px 24px;
  border: 1px solid var(--ot-rule-strong);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  display: grid;
  grid-template-columns: minmax(190px, 0.65fr) minmax(0, 1.35fr);
  gap: 28px;
  align-items: center;
  background: var(--ot-tint);
}

body.course-game-engine-1.game-engine-ot .stop-line span,
body.course-game-engine-1.game-engine-ot .stop-line strong {
  display: block;
}

body.course-game-engine-1.game-engine-ot .stop-line span {
  margin-bottom: 5px;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: var(--ot-label-size);
  font-weight: 650;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

body.course-game-engine-1.game-engine-ot .stop-line > div > strong {
  color: var(--ink-strong);
  font-size: 17px;
  line-height: 1.45;
}

body.course-game-engine-1.game-engine-ot .stop-line > p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.72;
}

body.course-game-engine-1.game-engine-ot .stop-line > p strong {
  display: inline;
  color: var(--ink-strong);
}

body.course-game-engine-1.game-engine-ot code {
  padding: 2px 5px;
  border: 1px solid var(--line);
  border-radius: 3px;
  font-size: 0.9em;
}

body.course-game-engine-1.game-engine-ot .agenda-bands {
  border-top: 1px solid var(--line-strong);
}

body.course-game-engine-1.game-engine-ot .agenda-band {
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(180px, 0.65fr) minmax(0, 1.35fr);
  gap: 30px;
}

body.course-game-engine-1.game-engine-ot .agenda-band-accent {
  margin-inline: -22px;
  padding-inline: 22px;
  background: var(--ot-tint-soft);
}

body.course-game-engine-1.game-engine-ot .agenda-band-heading span,
body.course-game-engine-1.game-engine-ot .agenda-band-heading h3 {
  display: block;
}

body.course-game-engine-1.game-engine-ot .agenda-band-heading span {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: var(--ot-label-size);
  font-weight: 650;
}

body.course-game-engine-1.game-engine-ot .agenda-band-heading h3 {
  margin: 8px 0 0;
  font-size: 17px;
  line-height: 1.42;
}

body.course-game-engine-1.game-engine-ot .agenda-band ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

body.course-game-engine-1.game-engine-ot .agenda-band li {
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 17px;
  align-items: baseline;
}

body.course-game-engine-1.game-engine-ot .agenda-band li:first-child {
  padding-top: 0;
}

body.course-game-engine-1.game-engine-ot .agenda-band li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

body.course-game-engine-1.game-engine-ot .agenda-band time {
  color: var(--quiet);
  font-family: var(--mono);
  font-size: var(--ot-label-size);
  font-weight: 600;
  white-space: nowrap;
}

body.course-game-engine-1.game-engine-ot .agenda-band li strong {
  display: block;
  color: var(--ink-strong);
  font-size: 14px;
}

body.course-game-engine-1.game-engine-ot .agenda-band li p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: var(--ot-small-text-size);
  line-height: 1.58;
}

body.course-game-engine-1.game-engine-ot .worksheet {
  padding: 26px;
  border: 1px solid var(--ot-rule);
  border-radius: 6px;
  background: var(--ot-tint);
}

body.course-game-engine-1.game-engine-ot .worksheet + .worksheet {
  margin-top: 18px;
}

body.course-game-engine-1.game-engine-ot .worksheet-label {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: var(--ot-label-size);
  font-weight: 650;
  letter-spacing: 0.03em;
}

body.course-game-engine-1.game-engine-ot .worksheet h3 {
  margin: 8px 0 20px;
}

body.course-game-engine-1.game-engine-ot .worksheet > p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: var(--ot-small-text-size);
  line-height: 1.68;
}

body.course-game-engine-1.game-engine-ot .experience-scale {
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  overflow: hidden;
  background: var(--paper);
}

body.course-game-engine-1.game-engine-ot .experience-scale > div {
  min-width: 0;
  padding: 18px;
  border-left: 1px solid var(--line);
}

body.course-game-engine-1.game-engine-ot .experience-scale > div:first-child {
  border-left: 0;
}

body.course-game-engine-1.game-engine-ot .experience-scale span,
body.course-game-engine-1.game-engine-ot .experience-scale strong {
  display: block;
}

body.course-game-engine-1.game-engine-ot .experience-scale span {
  margin-bottom: 13px;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 21px;
  font-weight: 650;
}

body.course-game-engine-1.game-engine-ot .experience-scale strong {
  color: var(--ink-strong);
  font-size: 14px;
}

body.course-game-engine-1.game-engine-ot .experience-scale p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.58;
}

body.course-game-engine-1.game-engine-ot .subscription-scale {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--line);
}

body.course-game-engine-1.game-engine-ot .subscription-scale > div {
  min-width: 0;
  padding: 16px 18px;
  background: var(--paper);
}

body.course-game-engine-1.game-engine-ot .subscription-scale strong {
  display: block;
  color: var(--ink-strong);
  font-size: 14px;
}

body.course-game-engine-1.game-engine-ot .subscription-scale p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.58;
}

body.course-game-engine-1.game-engine-ot .prompt-list {
  margin: 23px 0 0;
  padding-left: 23px;
}

body.course-game-engine-1.game-engine-ot .prompt-list li {
  margin: 8px 0;
  padding-left: 4px;
  color: var(--ink);
  line-height: 1.66;
}

body.course-game-engine-1.game-engine-ot .definition-split,
body.course-game-engine-1.game-engine-ot .vibe-split {
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr);
  gap: 1px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  overflow: hidden;
  background: var(--line);
}

body.course-game-engine-1.game-engine-ot .vibe-split {
  margin-top: 32px;
}

body.course-game-engine-1.game-engine-ot .definition-split article,
body.course-game-engine-1.game-engine-ot .vibe-split article {
  min-width: 0;
  padding: 25px;
  background: var(--paper);
}

body.course-game-engine-1.game-engine-ot .definition-split article:last-child,
body.course-game-engine-1.game-engine-ot .vibe-split article:last-child {
  background: var(--ot-tint-soft);
}

body.course-game-engine-1.game-engine-ot .definition-split h3,
body.course-game-engine-1.game-engine-ot .vibe-split h3 {
  margin: 0 0 11px;
  font-size: 19px;
}

body.course-game-engine-1.game-engine-ot .definition-split p,
body.course-game-engine-1.game-engine-ot .vibe-split p {
  margin: 0;
  color: var(--ink);
  line-height: 1.7;
}

body.course-game-engine-1.game-engine-ot .definition-split small,
body.course-game-engine-1.game-engine-ot .vibe-split small {
  margin-top: 14px;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

body.course-game-engine-1.game-engine-ot .already-built {
  margin: 28px 0 0;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  overflow: hidden;
  background: var(--line);
}

body.course-game-engine-1.game-engine-ot .already-built + p {
  margin-top: 32px;
}

body.course-game-engine-1.game-engine-ot .already-built-head,
body.course-game-engine-1.game-engine-ot .already-built-row {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 1px;
}

body.course-game-engine-1.game-engine-ot .already-built-head span,
body.course-game-engine-1.game-engine-ot .already-built-row p,
body.course-game-engine-1.game-engine-ot .already-built-row strong {
  min-width: 0;
  margin: 0;
  padding: 13px 16px;
  background: var(--paper);
}

body.course-game-engine-1.game-engine-ot .already-built-head span {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: var(--ot-label-size);
  font-weight: 650;
  letter-spacing: 0.02em;
}

body.course-game-engine-1.game-engine-ot .already-built-row p {
  color: var(--ink);
  font-size: var(--ot-small-text-size);
  font-weight: 500;
  line-height: 1.55;
}

body.course-game-engine-1.game-engine-ot .already-built-row strong {
  display: flex;
  align-items: center;
  background: var(--ot-tint-soft);
  color: var(--ink-strong);
  font-size: 14px;
  font-weight: 650;
}

body.course-game-engine-1.game-engine-ot .trend-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--line);
}

body.course-game-engine-1.game-engine-ot .trend-grid article {
  min-width: 0;
  min-height: 188px;
  padding: 22px;
  background: var(--paper);
}

body.course-game-engine-1.game-engine-ot .trend-grid article:last-child {
  grid-column: 1 / -1;
  min-height: 0;
}

body.course-game-engine-1.game-engine-ot .trend-grid span {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: var(--ot-label-size);
  font-weight: 650;
}

body.course-game-engine-1.game-engine-ot .trend-grid h3 {
  margin: 14px 0 10px;
  font-size: 16px;
  font-weight: 720;
  letter-spacing: -0.02em;
}

body.course-game-engine-1.game-engine-ot .trend-grid p {
  margin: 0;
  color: var(--muted);
  font-size: var(--ot-small-text-size);
  line-height: 1.62;
}

body.course-game-engine-1.game-engine-ot .mwu-videos {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin: 18px 0 0;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--line);
}

body.course-game-engine-1.game-engine-ot .mwu-videos article {
  min-width: 0;
  background: var(--paper);
}

body.course-game-engine-1.game-engine-ot .mwu-poster,
body.course-game-engine-1.game-engine-ot .mwu-frame {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  padding: 0;
  border: 0;
  position: relative;
  background: #111;
}

body.course-game-engine-1.game-engine-ot .mwu-poster {
  cursor: pointer;
}

body.course-game-engine-1.game-engine-ot .mwu-poster img,
body.course-game-engine-1.game-engine-ot .mwu-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

body.course-game-engine-1.game-engine-ot .mwu-frame iframe {
  border: 0;
}

body.course-game-engine-1.game-engine-ot .mwu-poster::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 11px 0 11px 18px;
  border-color: transparent transparent transparent #fff;
  filter: drop-shadow(0 1px 4px rgb(0 0 0 / 0.45));
  pointer-events: none;
}

body.course-game-engine-1.game-engine-ot .mwu-videos a {
  display: block;
  padding: 12px 14px 14px;
  color: var(--ink-strong);
  text-decoration: none;
}

body.course-game-engine-1.game-engine-ot .mwu-videos strong {
  display: block;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: -0.02em;
}

body.course-game-engine-1.game-engine-ot .mwu-videos a span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: var(--ot-label-size);
  font-weight: 650;
}

body.course-game-engine-1.game-engine-ot .game-loop {
  margin: 19px 0 32px;
  padding: 26px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr) 28px) minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  background: var(--paper);
}

body.course-game-engine-1.game-engine-ot .loop-node span,
body.course-game-engine-1.game-engine-ot .loop-node strong {
  display: block;
}

body.course-game-engine-1.game-engine-ot .loop-node span {
  margin-bottom: 9px;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 650;
  text-transform: uppercase;
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    break-inside: avoid;
  }
}