:root {
  /* Approved Acorn Thinking Space palette */
  --forest: #114915;
  --ivory: #e7dfc0;
  --moss: #2c6632;
  --sage: #8daa8f;
  --stone: #f6f4ee;
  --charcoal: #2f2f2f;
  --bronze: #a98b4f;
  --white: #ffffff;

  /* Temporary typography: no permanent brand typeface is approved. */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;

  --shell: 74rem;
  --reading: 46rem;
  --radius: 0.75rem;
  --shadow: 0 1.25rem 3rem rgba(17, 73, 21, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--stone);
  color: var(--charcoal);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.6rem 0.9rem;
  background: var(--white);
  color: var(--forest);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(calc(100% - 3rem), var(--shell));
  margin-inline: auto;
}

.narrow {
  max-width: var(--reading);
}

.site-header {
  position: relative;
  z-index: 5;
  border-bottom: 1px solid rgba(231, 223, 192, 0.28);
  background: var(--forest);
  color: var(--stone);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 5rem;
}

.brand-name {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 680;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.quiet-link {
  color: var(--ivory);
  font-size: 0.88rem;
  text-underline-offset: 0.3rem;
}

.hero {
  background: var(--forest);
  color: var(--stone);
  padding: clamp(5rem, 10vw, 9rem) 0 clamp(5.5rem, 11vw, 10rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(15rem, 1fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: end;
}

.hero-copy {
  max-width: 52rem;
}

.eyebrow {
  margin: 0 0 1.25rem;
  color: var(--moss);
  font-size: 0.73rem;
  font-weight: 750;
  letter-spacing: 0.14em;
  line-height: 1.35;
  text-transform: uppercase;
}

.hero .eyebrow,
.section-green .eyebrow {
  color: var(--ivory);
}

h1,
h2 {
  margin: 0;
  color: var(--forest);
  font-weight: 570;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

h1 {
  color: var(--stone);
  font-size: clamp(2.55rem, 5.4vw, 5.15rem);
  max-width: 16ch;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.75rem);
  max-width: 18ch;
}

.hero-lead {
  margin: clamp(2rem, 4vw, 3.25rem) 0 0.65rem;
  color: var(--ivory);
  font-size: clamp(1.3rem, 2vw, 1.65rem);
  line-height: 1.45;
}

.hero-body {
  max-width: 45rem;
  color: rgba(246, 244, 238, 0.84);
  font-size: 1.05rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 1.5rem;
  padding: 0.9rem 1.2rem;
  border: 1px solid var(--ivory);
  border-radius: 0.3rem;
  background: var(--ivory);
  color: var(--forest);
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
  text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.button:hover,
.button:focus-visible {
  background: transparent;
  color: var(--ivory);
  transform: translateY(-1px);
}

.hero-note {
  padding-bottom: 0.5rem;
  color: var(--ivory);
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
}

.hero-note p {
  margin: 0.45rem 0;
}

.rule {
  display: block;
  width: 3.25rem;
  height: 2px;
  margin-bottom: 1.4rem;
  background: var(--bronze);
}

.section {
  padding: clamp(5rem, 10vw, 9rem) 0;
  background: var(--white);
}

.section-stone {
  background: var(--stone);
}

.section-ivory {
  background: var(--ivory);
}

.section-green {
  background: var(--forest);
  color: var(--stone);
}

.split,
.audience-grid,
.offer-grid,
.faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(3rem, 8vw, 8rem);
}

.split-balanced {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.prose p:first-child,
.audience-grid p:first-of-type {
  margin-top: 0;
}

.prose p,
.narrow > p,
.audience-grid p,
.offer-grid p {
  max-width: 42rem;
}

.large-copy {
  margin: 2rem 0 1rem;
  color: var(--forest);
  font-size: clamp(1.35rem, 2.2vw, 1.8rem);
  line-height: 1.45;
}

.small-note,
.prototype-note,
.footer-note {
  font-size: 0.82rem;
}

.small-note {
  margin-top: 2rem;
  color: var(--moss);
}

.section-heading {
  max-width: 46rem;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.light-heading h2 {
  color: var(--stone);
}

.section-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 12rem;
  gap: clamp(2rem, 7vw, 7rem);
  align-items: center;
  max-width: none;
}

.reflection-mark {
  position: relative;
  width: 12rem;
  aspect-ratio: 1;
  justify-self: end;
}

.reflection-ring,
.reflection-centre {
  position: absolute;
  inset: 50% auto auto 50%;
  display: block;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.reflection-ring {
  border: 1px solid rgba(231, 223, 192, 0.48);
}

.reflection-ring-outer {
  width: 100%;
  height: 100%;
}

.reflection-ring-middle {
  width: 68%;
  height: 68%;
  border-color: rgba(141, 170, 143, 0.72);
}

.reflection-ring-inner {
  width: 36%;
  height: 36%;
  border-color: var(--bronze);
}

.reflection-centre {
  width: 0.55rem;
  height: 0.55rem;
  background: var(--ivory);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(3rem, 8vw, 8rem);
  row-gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: reflection-topic;
}

.topic-grid li {
  position: relative;
  min-height: 0;
  padding: 1.1rem 0 1.1rem 2.3rem;
  color: var(--stone);
  font-size: 1.05rem;
  counter-increment: reflection-topic;
}

.topic-grid li::before {
  content: counter(reflection-topic, decimal-leading-zero);
  position: absolute;
  top: 1.17rem;
  left: 0;
  color: var(--bronze);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.topic-grid li::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 2.3rem;
  width: 2.5rem;
  height: 1px;
  background: rgba(231, 223, 192, 0.28);
}

.closing-thought {
  max-width: 38rem;
  margin: 4rem 0 0 auto;
  padding-left: 1.4rem;
  border-left: 2px solid var(--bronze);
  color: var(--ivory);
  font-size: 1.15rem;
}

.audience-grid {
  align-items: start;
}

.audience-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(17, 73, 21, 0.3);
}

.audience-list li {
  padding: 1.1rem 0;
  border-bottom: 1px solid rgba(17, 73, 21, 0.3);
  color: var(--forest);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 620;
}

.centred {
  margin-inline: auto;
  text-align: center;
}

.centred h2,
.centred p {
  margin-inline: auto;
}

.experience .section-heading {
  max-width: 52rem;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  column-gap: clamp(2rem, 5vw, 4.5rem);
  row-gap: 0.35rem;
  margin: 0;
}

.principles p {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  margin: 0;
  padding: 0.85rem 0 1rem;
  border-top: 1px solid rgba(17, 73, 21, 0.18);
}

.principles strong {
  color: var(--forest);
  font-weight: 680;
}

.principles span {
  color: var(--moss);
}

.final-line {
  margin-top: 2.5rem;
  color: var(--forest);
}

.offer-grid {
  align-items: center;
}

.offer-card {
  padding: clamp(1.5rem, 4vw, 3rem);
  border-top: 0.22rem solid var(--forest);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
}

.offer-card dl {
  margin: 0;
}

.offer-card dl > div {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid rgba(17, 73, 21, 0.14);
}

.offer-card dl > div:last-child {
  border-bottom: 0;
}

.offer-card dt {
  color: var(--moss);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.offer-card dd {
  margin: 0;
  color: var(--forest);
  font-weight: 650;
}

.next-step {
  background: var(--forest);
  color: var(--stone);
}

.next-step h2,
.next-step .large-copy {
  color: var(--stone);
}

.next-step .eyebrow {
  color: var(--ivory);
}

.button-disabled {
  cursor: not-allowed;
}

.button-disabled:hover {
  background: var(--ivory);
  color: var(--forest);
  transform: none;
}

.prototype-note {
  margin-top: 0.8rem;
  color: var(--sage);
}

.faq-grid {
  align-items: start;
}

.faq-list {
  border-top: 1px solid rgba(17, 73, 21, 0.22);
}

details {
  border-bottom: 1px solid rgba(17, 73, 21, 0.22);
}

summary {
  position: relative;
  padding: 1.35rem 2.4rem 1.35rem 0;
  color: var(--forest);
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 680;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  position: absolute;
  top: 1.25rem;
  right: 0;
  color: var(--bronze);
  font-size: 1.4rem;
  font-weight: 400;
}

details[open] summary::after {
  content: "−";
}

details p {
  margin: 0;
  padding: 0 2.5rem 1.5rem 0;
}

.site-footer {
  padding: 2.5rem 0;
  background: var(--charcoal);
  color: var(--stone);
}

.footer-inner {
  min-height: 0;
}

.footer-inner > p {
  margin: 0;
}

.footer-note {
  color: var(--sage);
}

:focus-visible {
  outline: 3px solid var(--bronze);
  outline-offset: 4px;
}

@media (max-width: 52rem) {
  .hero-grid,
  .split,
  .split-balanced,
  .audience-grid,
  .offer-grid,
  .faq-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero-note {
    max-width: 18rem;
  }

  .section-intro {
    grid-template-columns: minmax(0, 1fr) 9rem;
  }

  .reflection-mark {
    width: 9rem;
  }

  .principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .faq-grid > div:first-child {
    position: static;
  }
}

@media (max-width: 38rem) {
  .shell {
    width: min(calc(100% - 2rem), var(--shell));
  }

  .header-inner {
    min-height: 4.25rem;
  }

  .quiet-link {
    display: none;
  }

  .hero {
    padding-top: 4rem;
  }

  h1 {
    font-size: clamp(2.35rem, 10.8vw, 3.15rem);
  }

  .section-intro,
  .topic-grid,
  .principles {
    grid-template-columns: 1fr;
  }

  .section-intro {
    gap: 2.25rem;
  }

  .reflection-mark {
    width: 7.5rem;
    justify-self: start;
  }

  .topic-grid li {
    min-height: 0;
    padding: 1.15rem 0 1.15rem 2.3rem;
  }

  .principles p {
    padding: 0.85rem 0 1rem;
  }

  .offer-card dl > div {
    grid-template-columns: 1fr;
    gap: 0.1rem;
  }

  .button {
    width: 100%;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.45rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}