/* ThreeDayAI AEO answer pages. Visual system: Unifold 3.0.0. */

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

html {
  background: var(--td-surface-canvas);
  color: var(--td-text-primary);
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 20rem;
  background: var(--td-surface-canvas);
  color: var(--td-text-primary);
  font-family: var(--td-font-body);
  font-size: var(--td-type-body-size);
  line-height: var(--td-type-body-line);
  -webkit-font-smoothing: antialiased;
}

body.theme-violet {
  --page-accent: var(--td-colour-violet);
  --page-accent-deep: var(--td-colour-violet-deep);
  --page-soft: var(--td-colour-violet-soft);
}

body.theme-sky {
  --page-accent: var(--td-colour-sky);
  --page-accent-deep: var(--td-colour-sky-deep);
  --page-soft: var(--td-colour-sky-soft);
}

body.theme-apricot {
  --page-accent: var(--td-colour-apricot);
  --page-accent-deep: var(--td-colour-apricot-deep);
  --page-soft: var(--td-colour-apricot-soft);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: var(--td-text-link);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

a:visited {
  color: var(--td-text-link-visited);
}

a:hover {
  color: var(--td-text-link-hover);
}

a:focus-visible,
summary:focus-visible {
  outline: var(--td-focus-ring-width) solid var(--td-focus-ring);
  outline-offset: var(--td-focus-offset);
}

p,
ul,
ol,
h1,
h2,
h3,
figure,
blockquote {
  margin-top: 0;
}

p:last-child,
ul:last-child,
ol:last-child {
  margin-bottom: 0;
}

.skip-link {
  position: fixed;
  top: var(--td-space-3);
  left: var(--td-space-3);
  z-index: 100;
  padding: var(--td-space-3) var(--td-space-4);
  border-radius: var(--td-radius-medium);
  background: var(--td-colour-carbon);
  color: var(--td-colour-warm-white);
  font-weight: 700;
  transform: translateY(-180%);
}

.skip-link:focus {
  color: var(--td-colour-warm-white);
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--td-border-subtle);
  background: var(--td-surface-canvas);
}

.header-inner,
.page-shell {
  width: min(calc(100% - (2 * var(--td-layout-outer-margin))), var(--td-layout-max-width));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  min-height: 5.25rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--td-space-6);
}

.brand-link {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  min-height: 44px;
}

.brand-link img {
  width: 10.5rem;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--td-space-6);
  font-weight: 600;
}

.site-nav > a:not(.button) {
  color: var(--td-text-primary);
  text-decoration: none;
}

.site-nav > a:not(.button):hover {
  text-decoration: underline;
  text-underline-offset: 0.32em;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--td-space-3);
}

.button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  gap: var(--td-space-2);
  padding: 0.75rem 1.15rem;
  border: 1px solid transparent;
  border-radius: var(--td-radius-medium);
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
  text-decoration: none;
  transition:
    background-color var(--td-duration-fast) var(--td-ease-standard),
    border-color var(--td-duration-fast) var(--td-ease-standard),
    color var(--td-duration-fast) var(--td-ease-standard),
    transform var(--td-duration-fast) var(--td-ease-standard);
}

.button:visited {
  color: inherit;
}

.button-primary {
  background: var(--td-action-primary);
  color: var(--td-action-primary-text);
}

.button-primary:visited {
  color: var(--td-action-primary-text);
}

.button-primary:hover {
  background: var(--td-action-primary-hover);
  color: var(--td-action-primary-text);
  transform: translateY(-2px);
}

.button-primary:active {
  background: var(--td-action-primary-active);
  transform: translateY(0);
}

.button-secondary {
  border-color: var(--td-border-strong);
  background: transparent;
  color: var(--td-text-primary);
}

.button-secondary:visited {
  color: var(--td-text-primary);
}

.button-secondary:hover {
  border-color: var(--td-text-primary);
  background: var(--td-surface-raised);
  color: var(--td-text-primary);
  transform: translateY(-2px);
}

.button-inverse {
  background: var(--td-action-primary);
  color: var(--td-action-primary-text);
}

.button-inverse:visited,
.button-inverse:hover {
  color: var(--td-action-primary-text);
}

.button-inverse:hover {
  background: var(--td-action-primary-hover);
  transform: translateY(-2px);
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--td-border-subtle);
}

.hero::after {
  position: absolute;
  right: max(var(--td-layout-outer-margin), calc((100vw - var(--td-layout-max-width)) / 2));
  bottom: 0;
  width: min(18vw, 15rem);
  height: 0.375rem;
  background: var(--page-accent);
  content: "";
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(18rem, 4fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: end;
  padding-block: clamp(4rem, 8vw, 7.5rem);
}

.eyebrow,
.section-label,
.meta-label {
  margin-bottom: var(--td-space-4);
  color: var(--page-accent-deep);
  font-family: var(--td-font-mono);
  font-size: var(--td-type-label-size);
  font-weight: var(--td-type-label-weight);
  letter-spacing: var(--td-type-label-tracking);
  line-height: var(--td-type-label-line);
  text-transform: uppercase;
}

.hero h1 {
  max-width: 14ch;
  margin-bottom: var(--td-space-6);
  font-family: var(--td-font-display);
  font-size: clamp(2.85rem, 6.4vw, 5.65rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 0.99;
  text-wrap: balance;
}

.direct-answer {
  max-width: 42rem;
  margin-bottom: var(--td-space-8);
  padding-left: var(--td-space-5);
  border-left: 0.25rem solid var(--page-accent);
  font-size: var(--td-type-lead-size);
  line-height: var(--td-type-lead-line);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--td-space-5);
}

.hero-price {
  max-width: 14rem;
  margin: 0;
  color: var(--td-text-secondary);
  font-size: var(--td-type-body-small-size);
  line-height: var(--td-type-body-small-line);
}

.method-board {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 4vw, 2.5rem);
  border-radius: var(--td-radius-extra-large);
  background: var(--td-surface-canvas);
  color: var(--td-text-primary);
  box-shadow: var(--td-shadow-overlay);
}

.method-board::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0.375rem;
  background: var(--page-accent);
  content: "";
}

.method-board .meta-label {
  color: var(--td-text-secondary);
}

.method-board h2 {
  margin-bottom: var(--td-space-6);
  font-family: var(--td-font-display);
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  font-weight: 550;
  letter-spacing: -0.025em;
  line-height: 1.12;
}

.phase-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: phase;
}

.phase-list li {
  display: grid;
  grid-template-columns: 2.25rem 1fr;
  gap: var(--td-space-3);
  padding-block: var(--td-space-4);
  border-top: 1px solid var(--td-border-subtle);
  counter-increment: phase;
}

.phase-list li::before {
  color: var(--td-colour-sky);
  content: "0" counter(phase);
  font-family: var(--td-font-mono);
  font-size: var(--td-type-caption-size);
  font-weight: 500;
}

.phase-list strong {
  display: block;
  margin-bottom: var(--td-space-1);
  font-family: var(--td-font-display);
  font-size: 1.05rem;
  font-weight: 650;
}

.phase-list span {
  display: block;
  color: var(--td-text-secondary);
  font-size: var(--td-type-body-small-size);
  line-height: var(--td-type-body-small-line);
}

.section {
  padding-block: clamp(4.5rem, 9vw, 8rem);
}

.section + .section {
  border-top: 1px solid var(--td-border-subtle);
}

.section-intro {
  display: grid;
  grid-template-columns: minmax(12rem, 4fr) minmax(0, 7fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: start;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

.section-intro h2,
.checkpoint-copy h2,
.final-cta h2,
.case-intro h2 {
  margin-bottom: var(--td-space-5);
  font-family: var(--td-font-display);
  font-size: var(--td-type-h2-size);
  font-weight: var(--td-type-h2-weight);
  letter-spacing: var(--td-type-h2-tracking);
  line-height: var(--td-type-h2-line);
  text-wrap: balance;
}

.section-intro > div:last-child > p,
.checkpoint-copy p,
.case-intro p {
  max-width: 42rem;
  color: var(--td-text-secondary);
  font-size: var(--td-type-body-large-size);
  line-height: var(--td-type-body-large-line);
}

.decision-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: clamp(1.5rem, 4vw, 4rem);
}

.decision-panel {
  padding-top: var(--td-space-6);
  border-top: 0.25rem solid var(--td-colour-carbon);
}

.decision-panel.is-fit {
  border-color: var(--page-accent);
}

.decision-panel h3,
.step h3,
.tool-copy h3,
.proof-copy h3 {
  margin-bottom: var(--td-space-4);
  font-family: var(--td-font-display);
  font-size: var(--td-type-h3-size);
  font-weight: var(--td-type-h3-weight);
  letter-spacing: var(--td-type-h3-tracking);
  line-height: var(--td-type-h3-line);
}

.check-list,
.plain-list {
  display: grid;
  gap: var(--td-space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.plain-list li {
  position: relative;
  padding-left: 1.6rem;
  color: var(--td-text-secondary);
}

.check-list li::before {
  position: absolute;
  top: 0.7em;
  left: 0;
  width: 0.55rem;
  height: 0.18rem;
  background: var(--page-accent);
  content: "";
}

.plain-list li::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 0.45rem;
  height: 1px;
  background: var(--td-border-strong);
  content: "";
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  counter-reset: step;
}

.step {
  padding-top: var(--td-space-6);
  border-top: 1px solid var(--td-border-strong);
  counter-increment: step;
}

.step::before {
  display: block;
  margin-bottom: var(--td-space-10);
  color: var(--page-accent-deep);
  content: "0" counter(step);
  font-family: var(--td-font-mono);
  font-size: var(--td-type-label-size);
  font-weight: 500;
  letter-spacing: var(--td-type-label-tracking);
}

.step p,
.proof-copy p {
  color: var(--td-text-secondary);
}

.checkpoint {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(16rem, 4fr);
  gap: clamp(2.5rem, 8vw, 8rem);
  align-items: center;
  padding: clamp(2rem, 6vw, 5rem);
  border-radius: var(--td-radius-extra-large);
  background: var(--td-surface-canvas);
  color: var(--td-text-primary);
  box-shadow: var(--td-shadow-low);
}

.checkpoint .section-label {
  color: var(--td-colour-sky);
}

.checkpoint-copy p {
  color: var(--td-text-secondary);
}

.checkpoint-note {
  padding: var(--td-space-6);
  border-left: 0.25rem solid var(--td-colour-apricot);
  background: var(--td-surface-raised);
}

.checkpoint-note strong {
  display: block;
  margin-bottom: var(--td-space-2);
  font-family: var(--td-font-display);
  font-size: var(--td-type-title-size);
  line-height: var(--td-type-title-line);
}

.checkpoint-note span {
  color: var(--td-text-secondary);
}

.tools-layout {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: start;
}

.tool-list {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tool-list li {
  margin: 0 var(--td-space-3) var(--td-space-3) 0;
  padding: var(--td-space-2) var(--td-space-3);
  border: 1px solid var(--td-border-subtle);
  border-radius: var(--td-radius-small);
  background: var(--td-surface-raised);
  color: var(--td-text-secondary);
  font-weight: 600;
  box-shadow: var(--td-shadow-low);
}

.tool-copy p {
  max-width: 38rem;
  color: var(--td-text-secondary);
  font-size: var(--td-type-body-large-size);
  line-height: var(--td-type-body-large-line);
}

.faq-list {
  border-top: 1px solid var(--td-border-strong);
}

.faq-list details {
  border-bottom: 1px solid var(--td-border-subtle);
}

.faq-list summary {
  position: relative;
  display: flex;
  min-height: 4.75rem;
  cursor: pointer;
  align-items: center;
  justify-content: space-between;
  gap: var(--td-space-6);
  padding: var(--td-space-5) 3rem var(--td-space-5) 0;
  font-family: var(--td-font-display);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 650;
  list-style: none;
}

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

.faq-list summary::after {
  position: absolute;
  right: var(--td-space-2);
  color: var(--page-accent-deep);
  content: "+";
  font-family: var(--td-font-mono);
  font-size: 1.35rem;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  max-width: 48rem;
  padding: 0 3rem var(--td-space-6) 0;
  color: var(--td-text-secondary);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--td-space-3) var(--td-space-6);
  margin-top: var(--td-space-8);
}

.related-links a {
  font-weight: 650;
}

.final-cta-wrap {
  padding-bottom: clamp(4.5rem, 9vw, 8rem);
}

.final-cta {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(18rem, 4fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: end;
  padding: clamp(2rem, 6vw, 5rem);
  border-radius: var(--td-radius-extra-large);
  background: var(--td-surface-canvas);
  color: var(--td-text-primary);
  box-shadow: var(--td-shadow-overlay);
}

.final-cta .section-label {
  color: var(--td-colour-apricot);
}

.final-cta p {
  max-width: 42rem;
  color: var(--td-text-secondary);
  font-size: var(--td-type-body-large-size);
  line-height: var(--td-type-body-large-line);
}

.final-cta .button-row {
  justify-content: flex-start;
}

.final-cta .email-link {
  color: var(--td-text-primary);
  font-weight: 650;
}

.site-footer {
  padding-block: var(--td-space-16) var(--td-space-10);
  border-top: 1px solid var(--td-border-subtle);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(16rem, 5fr) repeat(2, minmax(10rem, 2fr));
  gap: clamp(2rem, 7vw, 7rem);
}

.footer-brand img {
  width: 10.5rem;
  margin-bottom: var(--td-space-5);
}

.footer-brand p,
.footer-meta {
  color: var(--td-text-secondary);
  font-size: var(--td-type-body-small-size);
  line-height: var(--td-type-body-small-line);
}

.footer-group h2 {
  margin-bottom: var(--td-space-4);
  font-family: var(--td-font-mono);
  font-size: var(--td-type-label-size);
  font-weight: 500;
  letter-spacing: var(--td-type-label-tracking);
  line-height: var(--td-type-label-line);
  text-transform: uppercase;
}

.footer-group ul {
  display: grid;
  gap: var(--td-space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-group a {
  color: var(--td-text-primary);
}

.footer-meta {
  margin-top: var(--td-space-10);
  padding-top: var(--td-space-5);
  border-top: 1px solid var(--td-border-subtle);
}

/* Case study evidence */
.client-lockup {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--td-space-6);
  margin-bottom: var(--td-space-8);
  padding-bottom: var(--td-space-5);
  border-bottom: 1px solid var(--td-border-subtle);
}

.client-lockup > span {
  color: var(--td-text-secondary);
  font-family: var(--td-font-mono);
  font-size: var(--td-type-label-size);
  letter-spacing: var(--td-type-label-tracking);
  text-transform: uppercase;
}

.client-lockup img {
  width: min(13rem, 46vw);
  height: auto;
}

.metric-strip {
  display: grid;
  grid-template-columns: 0.8fr 1.1fr 0.8fr;
  gap: clamp(1rem, 4vw, 4rem);
  margin-top: clamp(3rem, 6vw, 5rem);
  padding-block: var(--td-space-8);
  border-top: 1px solid var(--td-border-strong);
  border-bottom: 1px solid var(--td-border-strong);
}

.metric strong {
  display: block;
  margin-bottom: var(--td-space-2);
  font-family: var(--td-font-display);
  font-size: clamp(2.3rem, 5vw, 4.8rem);
  font-weight: 550;
  letter-spacing: -0.045em;
  line-height: 1;
}

.metric:nth-child(1) strong {
  color: var(--td-colour-violet-deep);
}

.metric:nth-child(2) strong {
  color: var(--td-colour-sky-deep);
}

.metric:nth-child(3) strong {
  color: var(--td-colour-apricot-deep);
}

.metric span {
  display: block;
  max-width: 14rem;
  color: var(--td-text-secondary);
  line-height: var(--td-type-body-small-line);
}

.case-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--td-space-5);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: caseflow;
}

.case-flow li {
  position: relative;
  padding-top: var(--td-space-5);
  border-top: 0.25rem solid var(--td-border-subtle);
  counter-increment: caseflow;
}

.case-flow li:nth-child(1) {
  border-color: var(--td-colour-violet);
}

.case-flow li:nth-child(2),
.case-flow li:nth-child(3) {
  border-color: var(--td-colour-sky);
}

.case-flow li:nth-child(4) {
  border-color: var(--td-colour-apricot);
}

.case-flow li::before {
  display: block;
  margin-bottom: var(--td-space-5);
  color: var(--td-text-tertiary);
  content: "0" counter(caseflow);
  font-family: var(--td-font-mono);
  font-size: var(--td-type-label-size);
}

.case-flow strong {
  display: block;
  margin-bottom: var(--td-space-2);
  font-family: var(--td-font-display);
  font-size: 1.15rem;
  line-height: 1.3;
}

.case-flow span {
  color: var(--td-text-secondary);
  font-size: var(--td-type-body-small-size);
  line-height: var(--td-type-body-small-line);
}

.evidence-stage {
  position: relative;
  min-height: 40rem;
  margin-top: var(--td-space-10);
}

.evidence-card {
  position: absolute;
  width: min(65%, 47rem);
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--td-border-subtle);
  border-radius: var(--td-radius-large);
  background: var(--td-surface-raised);
  box-shadow: var(--td-shadow-overlay);
}

.evidence-card:first-child {
  top: 0;
  left: 0;
  transform: rotate(-1.2deg);
}

.evidence-card:last-child {
  right: 0;
  bottom: 0;
  transform: rotate(1.1deg);
}

.evidence-card img {
  width: 100%;
  height: auto;
}

.evidence-card figcaption {
  display: flex;
  gap: var(--td-space-4);
  align-items: baseline;
  padding: var(--td-space-4) var(--td-space-5);
  border-top: 1px solid var(--td-border-subtle);
  color: var(--td-text-secondary);
  font-size: var(--td-type-body-small-size);
}

.evidence-card figcaption strong {
  flex: 0 0 auto;
  color: var(--td-text-primary);
  font-family: var(--td-font-mono);
  font-size: var(--td-type-caption-size);
  letter-spacing: var(--td-type-label-tracking);
  text-transform: uppercase;
}

@media (max-width: 62rem) {
  .hero-grid,
  .section-intro,
  .checkpoint,
  .tools-layout,
  .final-cta {
    grid-template-columns: 1fr;
  }

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

  .method-board {
    max-width: 40rem;
  }

  .site-nav > a:not(.button) {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

@media (max-width: 47.99rem) {
  .header-inner {
    min-height: 4.5rem;
  }

  .brand-link img,
  .footer-brand img {
    width: 8.75rem;
  }

  .site-nav .button {
    min-height: 2.75rem;
    padding-inline: 0.85rem;
    font-size: 0.875rem;
  }

  .hero-grid {
    gap: var(--td-space-10);
    padding-block: var(--td-space-16);
  }

  .hero h1 {
    font-size: clamp(2.6rem, 13vw, 4rem);
  }

  .direct-answer {
    padding-left: var(--td-space-4);
  }

  .hero-actions,
  .button-row {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .button,
  .button-row .button {
    width: 100%;
  }

  .hero-price {
    max-width: none;
  }

  .decision-grid,
  .steps,
  .footer-grid,
  .metric-strip,
  .case-flow {
    grid-template-columns: 1fr;
  }

  .steps {
    gap: var(--td-space-10);
  }

  .step::before {
    margin-bottom: var(--td-space-5);
  }

  .checkpoint,
  .final-cta {
    padding: var(--td-space-8) var(--td-space-6);
  }

  .metric-strip {
    gap: var(--td-space-6);
  }

  .metric {
    display: grid;
    grid-template-columns: minmax(8rem, 0.7fr) 1fr;
    gap: var(--td-space-5);
    align-items: center;
  }

  .evidence-stage {
    display: grid;
    min-height: auto;
    gap: var(--td-space-6);
  }

  .evidence-card,
  .evidence-card:first-child,
  .evidence-card:last-child {
    position: relative;
    inset: auto;
    width: 100%;
    transform: none;
  }

  .evidence-card figcaption {
    display: block;
  }

  .evidence-card figcaption strong {
    display: block;
    margin-bottom: var(--td-space-2);
  }

  .footer-grid {
    gap: var(--td-space-8);
  }
}

@media (forced-colors: active) {
  .hero::after,
  .method-board::before,
  .check-list li::before {
    background: CanvasText;
  }

  .button,
  .method-board,
  .checkpoint,
  .final-cta {
    border: 1px solid CanvasText;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .button:hover,
  .evidence-card:first-child,
  .evidence-card:last-child {
    transform: none;
  }
}

@media print {
  .site-header,
  .final-cta-wrap,
  .site-footer {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .method-board,
  .checkpoint {
    border: 1px solid #000;
    background: #fff;
    color: #000;
  }
}