.ai-course-page {
  --school-accent: #b84400;
  --school-cover: #f5a35c;
  --school-shadow: #963800;
}

.ai-course-page main {
  overflow: hidden;
}

.ai-hero {
  padding: 34px 0 82px;
}

.ai-breadcrumb {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 46px;
  color: var(--muted);
  font-size: .7rem;
  font-weight: 900;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.ai-breadcrumb a {
  text-decoration: none;
}

.ai-breadcrumb span:last-child {
  color: var(--ink);
}

.ai-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, .85fr);
  gap: clamp(46px, 7vw, 92px);
  align-items: center;
}

.ai-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 24px;
  color: var(--green);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.ai-kicker::before {
  content: '';
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 5px color-mix(in srgb, currentColor 13%, transparent);
}

.ai-hero h1 {
  max-width: 850px;
  margin: 0;
  font: 700 clamp(4.3rem, 8.1vw, 8rem)/.78 Papernotes, Georgia, serif;
  letter-spacing: -.03em;
}

.ai-hero h1 span {
  display: block;
  color: var(--school-accent);
}

.ai-hero__lead {
  max-width: 720px;
  margin: 32px 0 0;
  font-size: clamp(1.05rem, 1.8vw, 1.28rem);
  line-height: 1.6;
}

.ai-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 30px;
}

.ai-button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  color: var(--ink);
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .025em;
  text-decoration: none;
  text-transform: uppercase;
}

.ai-button-secondary:hover {
  background: var(--ink);
  color: var(--paper);
}

.ai-hero__note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.5;
}

.ai-blueprint {
  position: relative;
  min-height: 510px;
  padding: 30px;
  border: 2px solid var(--ink);
  background: #211d1d;
  box-shadow: 12px 13px 0 var(--school-cover);
  color: #fffaf0;
  transform: rotate(1deg);
}

.ai-blueprint::before,
.ai-blueprint::after {
  content: '';
  position: absolute;
  pointer-events: none;
}

.ai-blueprint::before {
  inset: 12px;
  border: 1px solid rgba(255, 250, 240, .2);
}

.ai-blueprint::after {
  right: -34px;
  bottom: 76px;
  width: 110px;
  height: 110px;
  border: 1px solid rgba(255, 191, 0, .45);
  border-radius: 50%;
}

.ai-blueprint__top {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 15px;
  padding-bottom: 19px;
  border-bottom: 1px solid rgba(255, 250, 240, .26);
  color: #ffcf5a;
  font-size: .66rem;
  font-weight: 900;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.ai-blueprint__flow {
  position: relative;
  z-index: 1;
  margin: 32px 0;
  display: grid;
  gap: 11px;
}

.ai-blueprint__node {
  min-height: 58px;
  padding: 13px 15px;
  border: 1px solid rgba(255, 250, 240, .42);
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: center;
  background: rgba(255, 250, 240, .04);
}

.ai-blueprint__node span {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--school-cover);
  color: #211d1d;
  font-weight: 900;
}

.ai-blueprint__node strong {
  display: block;
  font-size: .86rem;
}

.ai-blueprint__node small {
  display: block;
  margin-top: 2px;
  color: rgba(255, 250, 240, .66);
  line-height: 1.35;
}

.ai-blueprint__arrow {
  height: 10px;
  margin-left: 31px;
  border-left: 2px dotted #ffcf5a;
}

.ai-blueprint__rule {
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 16px;
  border-left: 4px solid #ffcf5a;
  background: rgba(255, 191, 0, .09);
  font-size: .84rem;
  font-weight: 800;
  line-height: 1.5;
}

.ai-contract {
  padding: 0 0 88px;
}

.ai-contract__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.ai-contract__grid > div {
  min-height: 142px;
  padding: 26px 25px;
  border-right: 1px solid var(--line);
}

.ai-contract__grid > div:last-child {
  border-right: 0;
}

.ai-contract small {
  display: block;
  color: var(--school-accent);
  font-size: .66rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.ai-contract strong {
  display: block;
  margin: 18px 0 7px;
  font: 700 1.65rem/1 Papernotes, Georgia, serif;
}

.ai-contract p {
  margin: 0;
  color: var(--muted);
  font-size: .85rem;
  line-height: 1.45;
}

.ai-section {
  padding: 84px 0;
  border-top: 1px solid var(--line);
}

.ai-section__heading {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(270px, .75fr);
  gap: 60px;
  align-items: end;
  margin-bottom: 42px;
}

.ai-section__heading small {
  display: block;
  margin-bottom: 12px;
  color: var(--school-accent);
  font-size: .68rem;
  font-weight: 900;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.ai-section__heading h2 {
  max-width: 820px;
  margin: 0;
  font: 700 clamp(3rem, 5.8vw, 5.5rem)/.84 Papernotes, Georgia, serif;
}

.ai-section__heading > p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.ai-syllabus {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 2px solid var(--ink);
}

.ai-chapter-card {
  padding: 34px 36px 38px;
  border-bottom: 1px solid var(--line);
}

.ai-chapter-card:nth-child(odd) {
  border-right: 1px solid var(--line);
}

.ai-chapter-card__top {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 17px;
  align-items: center;
  margin-bottom: 24px;
}

.ai-chapter-card__number {
  width: 52px;
  height: 52px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--school-cover);
  color: #211d1d;
  font: 700 1.25rem/1 Papernotes, Georgia, serif;
}

.ai-chapter-card h3 {
  margin: 0;
  font: 700 clamp(1.7rem, 3vw, 2.3rem)/.94 Papernotes, Georgia, serif;
}

.ai-chapter-card ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.ai-chapter-card li {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  line-height: 1.4;
}

.ai-chapter-card li span {
  color: var(--school-accent);
  font-size: .67rem;
  font-weight: 900;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.ai-chapter-card li strong {
  font-size: .9rem;
}

.ai-build-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.ai-build {
  min-height: 310px;
  padding: 28px;
  border: 2px solid var(--ink);
  display: flex;
  flex-direction: column;
  background: var(--paper-raised);
  box-shadow: 6px 7px 0 var(--line);
}

.ai-build:nth-child(2) { box-shadow-color: var(--school-cover); }
.ai-build:nth-child(3) { box-shadow-color: #a9e7c2; }

.ai-build__label {
  color: var(--school-accent);
  font-size: .66rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.ai-build h3 {
  margin: 30px 0 13px;
  font: 700 2.1rem/.95 Papernotes, Georgia, serif;
}

.ai-build p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.ai-build ul {
  margin: auto 0 0;
  padding: 22px 0 0;
  list-style: none;
  font-size: .78rem;
  font-weight: 800;
}

.ai-build li + li { margin-top: 7px; }
.ai-build li::before { content: '✓'; margin-right: 8px; color: var(--green); }

.ai-setup {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, .95fr);
  gap: 46px;
}

.ai-setup__steps {
  counter-reset: setup;
  border-top: 2px solid var(--ink);
}

.ai-setup__step {
  counter-increment: setup;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 18px;
}

.ai-setup__step::before {
  content: counter(setup, decimal-leading-zero);
  color: var(--school-accent);
  font: 700 1.45rem/1 Papernotes, Georgia, serif;
}

.ai-setup__step h3 {
  margin: 0 0 7px;
  font-size: 1rem;
}

.ai-setup__step p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.ai-test-pack {
  align-self: start;
  padding: 32px;
  border: 2px solid var(--ink);
  background: #211d1d;
  box-shadow: 8px 9px 0 var(--school-cover);
  color: #fffaf0;
}

.ai-test-pack small {
  color: #ffcf5a;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.ai-test-pack h3 {
  margin: 16px 0 20px;
  font: 700 2.5rem/.92 Papernotes, Georgia, serif;
}

.ai-test-pack ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.ai-test-pack li {
  padding: 11px 0;
  border-top: 1px solid rgba(255, 250, 240, .2);
  font-size: .87rem;
  line-height: 1.4;
}

.ai-video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 2px solid var(--ink);
}

.ai-video {
  min-height: 126px;
  padding: 23px 25px;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 17px;
  align-items: center;
  color: var(--ink);
  text-decoration: none;
}

.ai-video:nth-child(odd) { border-right: 1px solid var(--line); }
.ai-video:hover { background: color-mix(in srgb, var(--school-cover) 15%, var(--paper-raised)); }

.ai-video__play {
  width: 46px;
  height: 46px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--school-cover);
  color: #211d1d;
}

.ai-video strong { display: block; line-height: 1.35; }
.ai-video small { display: block; margin-top: 5px; color: var(--muted); line-height: 1.4; }

.ai-price-wrap {
  padding: 92px 0;
  background: #211d1d;
  color: #fffaf0;
}

.ai-price {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(360px, .75fr);
  gap: 60px;
  align-items: center;
}

.ai-price__copy small {
  color: #ffcf5a;
  font-size: .7rem;
  font-weight: 900;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.ai-price__copy h2 {
  max-width: 760px;
  margin: 17px 0 22px;
  font: 700 clamp(3.4rem, 6.4vw, 6.3rem)/.82 Papernotes, Georgia, serif;
}

.ai-price__copy p {
  max-width: 660px;
  margin: 0;
  color: rgba(255, 250, 240, .72);
  line-height: 1.65;
}

.ai-price__card {
  padding: 34px;
  border: 2px solid #fffaf0;
  background: #2b2627;
  box-shadow: 10px 11px 0 var(--school-cover);
}

.ai-price__card > small {
  color: #ffcf5a;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.ai-price__amount {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  margin: 17px 0 20px;
}

.ai-price__amount strong {
  font: 700 clamp(3.5rem, 6vw, 5.2rem)/.78 Papernotes, Georgia, serif;
}

.ai-price__amount span {
  padding-bottom: 4px;
  color: rgba(255, 250, 240, .65);
  font-size: .78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.ai-price__card ul {
  margin: 0 0 25px;
  padding: 0;
  list-style: none;
}

.ai-price__card li {
  padding: 9px 0;
  border-top: 1px solid rgba(255, 250, 240, .18);
  font-size: .88rem;
}

.ai-price__card li::before { content: '✓'; margin-right: 9px; color: #4cd486; }

.ai-price__card .notes-button {
  width: 100%;
  border-color: #fffaf0;
  background: #fffaf0;
  color: #211d1d;
}

.ai-price__card > p {
  margin: 18px 0 0;
  color: rgba(255, 250, 240, .62);
  font-size: .72rem;
  line-height: 1.5;
}

.ai-payment-status {
  min-height: 1.4em;
  margin: 11px 0 0;
  color: #ffcf5a;
  font-size: .76rem;
  font-weight: 800;
}

.ai-research-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.ai-research-card {
  padding-top: 20px;
  border-top: 3px solid var(--ink);
}

.ai-research-card h3 {
  margin: 0 0 12px;
  font: 700 1.7rem/1 Papernotes, Georgia, serif;
}

.ai-research-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.ai-research-card a {
  display: inline-block;
  margin-top: 15px;
  color: var(--school-accent);
  font-size: .76rem;
  font-weight: 900;
  text-underline-offset: 4px;
}

.ai-faq {
  border-top: 2px solid var(--ink);
}

.ai-faq details {
  border-bottom: 1px solid var(--line);
}

.ai-faq summary {
  padding: 23px 4px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-weight: 900;
  cursor: pointer;
}

.ai-faq summary::after { content: '+'; color: var(--school-accent); font-size: 1.25rem; }
.ai-faq details[open] summary::after { content: '−'; }
.ai-faq details p { max-width: 850px; margin: -4px 0 24px; color: var(--muted); line-height: 1.65; }

@media (max-width: 980px) {
  .ai-hero__grid,
  .ai-price { grid-template-columns: 1fr; }
  .ai-blueprint { width: min(620px, 100%); min-height: 0; transform: none; }
  .ai-contract__grid { grid-template-columns: repeat(2, 1fr); }
  .ai-contract__grid > div:nth-child(2) { border-right: 0; }
  .ai-contract__grid > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .ai-build-grid { grid-template-columns: 1fr; }
  .ai-build { min-height: 0; }
  .ai-build ul { margin-top: 24px; }
  .ai-price__card { width: min(560px, 100%); }
}

@media (max-width: 760px) {
  .ai-hero { padding-top: 26px; padding-bottom: 64px; }
  .ai-breadcrumb { margin-bottom: 36px; }
  .ai-hero h1 { font-size: clamp(4rem, 20vw, 6rem); }
  .ai-hero__actions { flex-direction: column; align-items: stretch; }
  .ai-hero__actions > * { width: 100%; }
  .ai-contract { padding-bottom: 62px; }
  .ai-contract__grid { grid-template-columns: 1fr; }
  .ai-contract__grid > div { min-height: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .ai-contract__grid > div:last-child { border-bottom: 0; }
  .ai-section { padding: 64px 0; }
  .ai-section__heading { grid-template-columns: 1fr; gap: 18px; }
  .ai-syllabus { grid-template-columns: 1fr; }
  .ai-chapter-card { padding-inline: 6px; }
  .ai-chapter-card:nth-child(odd) { border-right: 0; }
  .ai-setup { grid-template-columns: 1fr; }
  .ai-video-grid { grid-template-columns: 1fr; }
  .ai-video:nth-child(odd) { border-right: 0; }
  .ai-price-wrap { padding-block: 68px; }
  .ai-price__card { padding: 28px 24px; }
  .ai-research-grid { grid-template-columns: 1fr; }
}

@media (max-width: 430px) {
  .ai-blueprint { padding: 23px; box-shadow: 8px 9px 0 var(--school-cover); }
  .ai-blueprint__top { flex-direction: column; }
  .ai-chapter-card__top { grid-template-columns: 46px 1fr; }
  .ai-chapter-card__number { width: 44px; height: 44px; }
  .ai-test-pack { padding: 27px 22px; }
  .ai-video { padding-inline: 4px; grid-template-columns: 42px 1fr; }
  .ai-video__play { width: 40px; height: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  .ai-blueprint { transform: none; }
}