.section {
  padding-block: var(--space-section);
}

.section--ink {
  background: var(--color-ink);
  color: var(--color-paper);
}

.section--paper {
  background: var(--color-paper);
  color: var(--color-ink);
}

/* Hero */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-lg);
}

.hero__headline {
  max-width: 18ch;
}

.hero__headline .line {
  display: block;
}

.hero__disclosure {
  max-width: 40ch;
}

.hero__disclosure summary {
  cursor: pointer;
  width: fit-content;
}

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

.hero__disclosure summary:hover,
.hero__disclosure summary:focus-visible {
  color: var(--color-terracotta);
}

.hero__disclosure-def {
  margin-top: var(--space-xs);
  color: var(--color-gray);
  font-size: var(--text-base);
}

.hero__headline .line--muted {
  color: var(--color-gray);
  font-size: 0.55em;
  font-family: var(--font-body);
  font-weight: 500;
  letter-spacing: 0;
  margin-top: var(--space-sm);
}

.scroll-cue {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-gray);
  opacity: 1;
  transition: opacity var(--duration-normal) var(--ease-out-expo);
}

.scroll-cue.is-hidden {
  opacity: 0;
}

.scroll-cue__label {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.scroll-cue__track {
  width: 1px;
  height: 2.75rem;
  background: rgba(138, 143, 152, 0.35);
  position: relative;
}

.scroll-cue__signal {
  position: absolute;
  top: 0;
  left: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-terracotta);
  transform: translate(-50%, 0);
  animation: scroll-cue-ping 2s var(--ease-out-expo) infinite;
}

@keyframes scroll-cue-ping {
  0% {
    transform: translate(-50%, 0);
    opacity: 0;
  }
  15% {
    opacity: 1;
  }
  85% {
    opacity: 1;
  }
  100% {
    transform: translate(-50%, 2.25rem);
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-cue__signal {
    animation: none;
    top: auto;
    bottom: 0;
    opacity: 1;
  }
}

/* Symptom / Diagnosis / Fix shared structure */
.diagnostic-section__head {
  margin-bottom: var(--space-lg);
}

.diagnostic-section__head .eyebrow {
  display: block;
  margin-bottom: var(--space-sm);
}

.symptom-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-md);
  border-top: 1px solid rgba(245, 243, 237, 0.15);
}

.symptom-list li {
  padding-block: var(--space-md);
  padding-left: var(--space-md);
  border-bottom: 1px solid rgba(245, 243, 237, 0.15);
  border-left: 2px solid transparent;
  font-size: var(--text-lg);
  font-family: var(--font-display);
  font-weight: 500;
  max-width: 48ch;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--duration-normal) var(--ease-out-expo),
    transform var(--duration-normal) var(--ease-out-expo),
    border-color var(--duration-fast) var(--ease-out-expo),
    background-color var(--duration-fast) var(--ease-out-expo);
}

.symptom-list li:hover,
.symptom-list li:focus-within {
  border-left-color: var(--color-terracotta);
  background-color: rgba(245, 243, 237, 0.03);
}

.reveal.is-visible .symptom-list li {
  opacity: 1;
  transform: translateY(0);
}

.symptom-list li:nth-child(1) {
  transition-delay: 0ms;
}

.symptom-list li:nth-child(2) {
  transition-delay: 110ms;
}

.symptom-list li:nth-child(3) {
  transition-delay: 220ms;
}

.stat-block {
  display: grid;
  gap: var(--space-sm);
  max-width: 50ch;
}

.stat-block__number {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(3rem, 2.2rem + 4vw, 5.5rem);
  line-height: 1;
  color: var(--color-terracotta);
  font-variant-numeric: tabular-nums;
}

.stat-block__figure {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--color-paper);
}

.term-callout {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  border: 1px solid rgba(245, 243, 237, 0.15);
  border-left: 2px solid var(--color-green);
  max-width: 60ch;
  display: grid;
  gap: var(--space-xs);
}

.term-callout .eyebrow {
  margin-bottom: var(--space-xs);
}

.term-callout__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
}

.term-callout__def {
  color: var(--color-gray);
}

.stat-block__source {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  color: var(--color-gray);
}

.stat-block__note {
  color: var(--color-gray);
  font-size: var(--text-base);
  margin-top: var(--space-xs);
}

.diagnosis__copy {
  display: grid;
  gap: var(--space-md);
  max-width: 60ch;
  font-size: var(--text-lg);
}

.fix__intro {
  max-width: 60ch;
  font-size: var(--text-base);
  color: var(--color-ink);
  margin-bottom: var(--space-lg);
}

.fix__intro em {
  font-style: normal;
  color: var(--color-green);
  font-family: var(--font-mono);
}

.offer-ladder {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(15, 17, 21, 0.15);
}

.offer-ladder li {
  padding-block: var(--space-md);
  padding-left: var(--space-md);
  border-bottom: 1px solid rgba(15, 17, 21, 0.15);
  border-left: 2px solid transparent;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  align-items: baseline;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--duration-normal) var(--ease-out-expo),
    transform var(--duration-normal) var(--ease-out-expo),
    border-color var(--duration-fast) var(--ease-out-expo),
    background-color var(--duration-fast) var(--ease-out-expo);
}

.offer-ladder li:hover,
.offer-ladder li:focus-within {
  border-left-color: var(--color-terracotta);
  background-color: rgba(15, 17, 21, 0.04);
}

.reveal.is-visible .offer-ladder li {
  opacity: 1;
  transform: translateY(0);
}

.offer-ladder li:nth-child(1) {
  transition-delay: 0ms;
}

.offer-ladder li:nth-child(2) {
  transition-delay: 110ms;
}

.offer-ladder__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  white-space: nowrap;
}

.offer-ladder__desc {
  color: var(--color-gray);
}

.closing {
  text-align: center;
  display: grid;
  gap: var(--space-lg);
  justify-items: center;
}

.closing__statement {
  max-width: 24ch;
}

/* Footer */
.site-footer {
  padding-block: var(--space-lg);
  font-family: var(--font-mono);
  font-size: var(--text-label);
  color: var(--color-gray);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(245, 243, 237, 0.1);
}

.site-footer a {
  color: var(--color-paper);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 40rem) {
  .offer-ladder li {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }
}