/* Styles are scoped to the from-scratch collection. */
.page-content:has(.scratch-hub) > .wrapper {
  max-width: 1120px;
}

.scratch-hub {
  --scratch-accent: #b60917;
  --scratch-llm-surface: #f2f6f8;
  --scratch-reasoning-surface: #faf5ed;
  padding: 22px 0 40px;
}

[data-theme='dark'] .scratch-hub {
  --scratch-accent: #ff9096;
  --scratch-llm-surface: #14202c;
  --scratch-reasoning-surface: #24201d;
}

.scratch-hub a:focus-visible {
  outline: 3px solid var(--color-link);
  outline-offset: 5px;
  border-radius: 2px;
}

.scratch-hub,
.scratch-hub h2,
.scratch-hub [id] {
  scroll-margin-top: 150px;
}

.scratch-hub h1,
.scratch-hub h2,
.scratch-hub h3,
.scratch-hub h4 {
  padding: 0;
}

.scratch-hero {
  max-width: 890px;
  margin-bottom: 42px;
}

.scratch-eyebrow,
.scratch-book__eyebrow,
.scratch-resource__format {
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.scratch-eyebrow {
  margin: 0 0 19px;
}

.scratch-hero h1 {
  margin: 0 0 23px;
  font-size: clamp(36px, 5.1vw, 62px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.scratch-hero__si {
  color: var(--color-text-muted);
  font-weight: 400;
}

.scratch-hero__accent {
  color: var(--scratch-accent);
}

.scratch-hero__intro {
  max-width: 710px;
  margin: 0;
  color: var(--color-text-muted);
  font-size: 19px;
  line-height: 1.65;
}

.scratch-section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.scratch-section-heading h2 {
  margin: 0;
  font-size: 23px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.scratch-section-heading > a {
  flex-shrink: 0;
  font-size: 14px;
}

.scratch-books__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.scratch-book {
  display: grid;
  grid-template-columns: 135px minmax(0, 1fr);
  align-items: start;
  gap: 26px;
  padding: 30px 26px 25px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.scratch-book--llms {
  background: var(--scratch-llm-surface);
}

.scratch-book--reasoning {
  background: var(--scratch-reasoning-surface);
}

.scratch-book__cover {
  display: block;
  margin-top: 8px;
}

.scratch-book__cover img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 1px 4px 4px 1px;
  box-shadow: 5px 9px 15px rgba(0, 0, 0, 0.17);
}

.scratch-book__eyebrow {
  margin: 0 0 10px;
  font-size: 10px;
}

.scratch-book__body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  align-self: stretch;
}

.scratch-book__body > .scratch-button {
  margin-top: auto;
}

.scratch-book h3 {
  margin: 0 0 12px;
  font-size: 25px;
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.scratch-book h3 a,
.scratch-book h3 a:visited {
  color: var(--color-heading);
}

.scratch-book h3 span {
  display: block;
  margin-top: 6px;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0;
}

.scratch-book__body > p:not(.scratch-book__eyebrow) {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-muted);
}

.scratch-hub .scratch-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 10px 15px;
  border: 1px solid var(--color-heading);
  border-radius: 5px;
  background: var(--color-heading);
  color: var(--color-bg);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  text-decoration: none;
}

.scratch-hub .scratch-button:hover {
  background: var(--color-link-hover);
  border-color: var(--color-link-hover);
  color: var(--color-bg);
}

.scratch-book__links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-top: 13px;
  font-size: 12px;
}

.scratch-book__links a {
  padding: 5px 0;
}

.scratch-books__note {
  margin: 18px 0 0;
  max-width: 890px;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

.scratch-nav {
  margin: 42px 0 10px;
  padding: 22px 0;
  border-top: 1px solid var(--color-border-strong);
  border-bottom: 1px solid var(--color-border-strong);
}

.scratch-nav__heading {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 20px;
  margin-bottom: 13px;
  font-size: 13px;
  font-weight: 600;
}

.scratch-nav__heading > :last-child {
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 400;
}

.scratch-nav__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scratch-nav__links a {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 5px;
  color: var(--color-heading);
  font-size: 13px;
  text-decoration: none;
}

.scratch-nav__links a:hover {
  background: var(--color-elevated);
  border-color: var(--color-link);
}

.scratch-nav__links span {
  color: var(--color-text-muted);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.scratch-topic {
  padding: 38px 0 22px;
  border-bottom: 1px solid var(--color-border-strong);
}

.scratch-topic__header {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 10px;
}

.scratch-topic__number {
  color: var(--scratch-accent);
  font: 13px ui-monospace, SFMono-Regular, Consolas, monospace;
}

.scratch-topic__header h2 {
  margin: 0 0 7px;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.035em;
}

.scratch-topic__header p {
  max-width: 780px;
  margin: 0;
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.65;
}

.scratch-group__title {
  margin: 30px 0 2px;
  color: var(--scratch-accent);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.scratch-resources {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 48px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.scratch-resource {
  position: relative;
  padding: 23px 0;
  border-bottom: 1px solid var(--color-border);
}

.scratch-resource__format {
  display: block;
  margin-bottom: 7px;
  font-size: 10px;
}

.scratch-resource__title {
  margin: 0 0 7px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.015em;
}

.scratch-resource__title a,
.scratch-resource__title a:visited {
  color: var(--color-heading);
}

.scratch-resource__title a:hover {
  color: var(--color-link-hover);
}

.scratch-resource__title span {
  color: var(--color-text-muted);
  font-size: 14px;
  white-space: nowrap;
}

.scratch-resource p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.65;
}

.scratch-resource__code {
  display: inline-block;
  padding: 7px 0 0;
  font-size: 12px;
  font-weight: 600;
}

.scratch-topic__more {
  margin: 18px 0 0;
  font-size: 13px;
}

.scratch-next {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 44px;
  padding: 32px;
  margin-top: 44px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-elevated);
}

.scratch-next h2 {
  margin: 0 0 10px;
  font-size: 25px;
  font-weight: 600;
}

.scratch-next p {
  margin-bottom: 20px;
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.6;
}

.scratch-next__links {
  display: grid;
  align-content: center;
}

.scratch-next__links a {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}

@media (max-width: 1050px) and (min-width: 761px) {
  .scratch-book {
    grid-template-columns: 100px minmax(0, 1fr);
    gap: 20px;
    padding: 24px 20px;
  }

  .scratch-book h3 {
    font-size: 22px;
  }
}

@media (max-width: 760px) {
  .scratch-hub {
    padding-top: 10px;
  }

  .scratch-hero {
    margin-bottom: 32px;
  }

  .scratch-hero__intro {
    font-size: 17px;
  }

  .scratch-books__grid,
  .scratch-next {
    grid-template-columns: 1fr;
  }

  .scratch-book {
    grid-template-columns: 125px minmax(0, 1fr);
  }

  .scratch-resources {
    column-gap: 28px;
  }

  .scratch-topic__header h2 {
    font-size: 25px;
  }
}

@media (max-width: 520px) {
  .scratch-section-heading {
    flex-wrap: wrap;
    gap: 6px;
  }

  .scratch-section-heading h2 {
    font-size: 22px;
  }

  .scratch-book {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 10px 18px;
    padding: 22px 18px;
  }

  .scratch-book__body {
    display: contents;
  }

  .scratch-book__cover {
    grid-column: 1;
    grid-row: 1 / span 2;
    margin-top: 0;
  }

  .scratch-book__eyebrow,
  .scratch-book h3 {
    grid-column: 2;
    margin: 0;
  }

  .scratch-book h3 {
    font-size: 20px;
  }

  .scratch-book__eyebrow {
    font-size: 9px;
    letter-spacing: 0.04em;
  }

  .scratch-book__body > p:not(.scratch-book__eyebrow) {
    grid-column: 1 / -1;
    margin: 8px 0;
    font-size: 14px;
  }

  .scratch-book__body > .scratch-button,
  .scratch-book__links {
    grid-column: 1 / -1;
    justify-self: start;
    margin-top: 0;
  }

  .scratch-hub .scratch-button {
    gap: 10px;
    padding: 9px 10px;
    font-size: 12px;
  }

  .scratch-book__links {
    column-gap: 12px;
  }

  .scratch-resources {
    grid-template-columns: 1fr;
  }

  .scratch-topic__header {
    gap: 12px;
  }

  .scratch-next {
    padding: 24px 20px;
    gap: 20px;
  }
}