:root {
  --bg: #070707;
  --fg: #ecece8;
  --muted: #8d8d88;
  --faint: #5a5a56;
  --line: rgba(255, 255, 255, 0.08);
  --coral: #ff5c39;
  --page: 44rem;
  --sans: "Outfit", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --display: "Michroma", "Outfit", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
}

body {
  font-family: var(--sans);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.55;
  letter-spacing: 0.01em;
  min-height: 100vh;
  overflow-x: hidden;
  overflow-wrap: break-word;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--coral);
}

::selection {
  background: var(--coral);
  color: #070707;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.site-header-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  max-width: var(--page);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 1rem;
}

.brand {
  font-family: var(--display);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--coral);
}

.nav {
  display: flex;
  gap: 1.25rem;
  font-family: var(--display);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav a[href^="http"] {
  color: var(--faint);
}

.page {
  max-width: var(--page);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.hero {
  padding: 3rem 0;
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--display);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  line-height: 1.5;
}

.section {
  padding: 4rem 0 1rem;
  border-top: 1px solid var(--line);
}

.section:first-child {
  border-top: 0;
  padding-top: 2.75rem;
}

.section-head {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 0.75rem 1rem;
  margin-bottom: 1.75rem;
}

.section-n {
  font-size: 0.6875rem;
  color: var(--coral);
  padding-top: 0.35rem;
}

.section-head h2 {
  margin: 0 0 0.4rem;
  font-family: var(--display);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--coral);
}

.section-head h2:last-child {
  margin-bottom: 0;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.section-body {
  padding-left: 3.5rem;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  margin: 0 0 1.25rem;
  font-size: 0.875rem;
}

.link-row a {
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.05rem;
}

.link-row a:hover {
  border-color: var(--coral);
}

.prompt {
  border: 1px solid var(--line);
  background: transparent;
  padding: 0.9rem 1rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: start;
}

.prompt pre {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--fg);
}

.copy-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.6875rem;
  padding: 0.3rem 0.5rem;
  cursor: pointer;
}

.copy-btn:hover,
.copy-btn.is-copied {
  color: var(--coral);
  border-color: var(--coral);
}

.prompt-note {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.8125rem;
  color: var(--faint);
}

.starter-link {
  display: inline-block;
  margin-top: 1.15rem;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.05rem;
}

.concept,
.build {
  border-top: 1px solid var(--line);
}

.concept:last-child,
.build:last-child {
  border-bottom: 1px solid var(--line);
}

.concept summary,
.build summary {
  list-style: none;
  display: grid;
  grid-template-columns: 2.5rem 1fr auto;
  gap: 0.75rem 1rem;
  padding: 1rem 0;
  cursor: pointer;
  background: transparent;
}

.concept summary::-webkit-details-marker,
.build summary::-webkit-details-marker {
  display: none;
}

.concept summary:hover .concept-title,
.build summary:hover .build-title {
  color: var(--coral);
}

.concept-n,
.build-n {
  font-size: 0.6875rem;
  color: var(--faint);
  padding-top: 0.3rem;
}

.concept-title,
.build-title {
  margin: 0 0 0.35rem;
  font-family: var(--display);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.concept-promise,
.build-lede {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.concept-mark,
.build-mark {
  color: var(--faint);
  font-size: 1rem;
  line-height: 1;
  padding-top: 0.25rem;
}

.concept[open] .concept-n,
.concept[open] .concept-mark,
.build[open] .build-n,
.build[open] .build-mark {
  color: var(--coral);
}

.concept[open] .concept-mark,
.build[open] .build-mark {
  transform: rotate(45deg);
}

.concept-body,
.build-body {
  padding: 0 0 1.4rem 3.5rem;
}

.concept-body p,
.build-body > p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.video {
  position: relative;
  border: 1px solid var(--line);
  background: transparent;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  margin: 0 0 0.85rem;
}

.video video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.play-glyph {
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--fg);
  display: grid;
  place-items: center;
}

.play-glyph::after {
  content: "";
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 5px 0 5px 9px;
  border-color: transparent transparent transparent var(--fg);
  margin-left: 2px;
}

.play:hover .play-glyph {
  border-color: var(--coral);
}

.play:hover .play-glyph::after {
  border-color: transparent transparent transparent var(--coral);
}

.video.is-playing .play {
  display: none;
}

.build-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.1rem;
  margin: 0 0 0.5rem;
  font-size: 0.8125rem;
}

.build-links a {
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.05rem;
}

.build-links .soon {
  color: var(--faint);
  border-bottom: 1px dashed var(--line);
}

.build-script summary {
  display: block;
  padding: 0.35rem 0;
  color: var(--faint);
  font-size: 0.8125rem;
}

.build-script[open] summary {
  color: var(--coral);
}

.build-script ol {
  margin: 0.25rem 0 0;
  padding: 0 0 0 1.1rem;
  color: var(--muted);
  font-size: 0.875rem;
}

.build-script li + li {
  margin-top: 0.3rem;
}

.site-footer {
  max-width: var(--page);
  margin: 0 auto;
  padding: 1rem 1.5rem 2rem;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: flex-end;
  font-size: 0.75rem;
}

.site-footer a {
  color: var(--muted);
}

@media (max-width: 720px) {
  .site-header-inner {
    flex-wrap: wrap;
    gap: 0.6rem 1rem;
    padding: 1.15rem 1.15rem 0.85rem;
  }

  .nav {
    width: 100%;
    gap: 1rem;
  }

  .page {
    padding: 0 1.15rem 3rem;
  }

  .section {
    padding-top: 2.75rem;
  }

  .section:first-child {
    padding-top: 2rem;
  }

  .section-head,
  .concept summary,
  .build summary {
    grid-template-columns: 2rem 1fr auto;
  }

  .section-body,
  .concept-body,
  .build-body {
    padding-left: 0;
  }

  .prompt {
    grid-template-columns: 1fr;
  }
}