.course-page {
  --course-tint: var(--sage);
  --course-soft: var(--sage-soft);
  background: var(--paper);
}
.course-page[data-course-id="ux-ui"] {
  --course-tint: var(--blue);
  --course-soft: var(--blue-soft);
}

.course-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
  min-height: 76px;
  padding: 0 max(5vw, calc((100vw - var(--max)) / 2));
  background: rgba(250, 249, 245, 0.8);
  border-bottom: 1px solid transparent;
  transition: background 180ms ease, border-color 180ms ease, backdrop-filter 180ms ease;
}
.course-header.is-scrolled {
  background: rgba(250, 249, 245, 0.95);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}
.course-nav { display: flex; justify-content: center; gap: 1.4rem; }
.course-nav a { color: #4f4d48; font-size: 0.86rem; text-decoration: none; }
.course-nav a:visited { color: #4f4d48; }
.course-nav a:hover { color: var(--ink); }

.course-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.48fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
  min-height: auto;
  padding-top: clamp(9rem, 11vw, 11rem);
  padding-bottom: clamp(4.5rem, 7vw, 7rem);
}
.course-hero h1 { max-width: 10ch; }
.course-hero .hero-text { margin: 1.8rem 0; }
.back-link,
.back-link:visited { display: inline-block; margin-bottom: 2.25rem; color: var(--muted); font-size: 0.86rem; font-weight: var(--weight-medium); text-underline-offset: 0.3rem; }

.hero-facts,
.topic-cloud,
.simple-tag-list,
.experience-line { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.hero-facts span,
.topic-cloud span,
.simple-tag-list span,
.experience-line span {
  padding: 0.48rem 0.72rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
}

.course-price-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 340px;
  overflow: hidden;
  padding: clamp(1.6rem, 3vw, 2.2rem);
  background: var(--course-tint);
  border: 0;
  border-radius: var(--radius-large);
}
.course-price-panel .price {
  margin: auto 0 0;
  max-width: 100%;
  font-size: clamp(2.75rem, 4vw, 4rem);
  font-weight: var(--weight-medium);
  letter-spacing: -0.055em;
  line-height: 0.98;
  overflow-wrap: normal;
}
.installment { margin: 0.7rem 0 1.7rem; color: var(--muted); }
.course-primary-action { width: 100%; margin-top: 1rem; }

.compact-section { padding-top: 5rem; padding-bottom: 5rem; }
.plain-audience-list {
  counter-reset: audiences;
  display: grid;
  gap: 0;
  padding: 0.65rem 1.5rem;
  margin: 0;
  overflow: hidden;
  background: var(--course-soft);
  border-radius: var(--radius-medium);
  list-style: none;
}
.plain-audience-list li {
  counter-increment: audiences;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 0.75rem;
  align-items: center;
  min-height: 76px;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(23,23,23,0.13);
  font-size: 1rem;
  font-weight: var(--weight-medium);
}
.plain-audience-list li:last-child { border-bottom: 0; }
.plain-audience-list li::before {
  content: counter(audiences, decimal-leading-zero);
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  color: var(--ink);
  background: var(--white);
  border-radius: 50%;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
}
.topic-cloud {
  counter-reset: topics;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.topic-cloud span {
  counter-increment: topics;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: space-between;
  min-height: 132px;
  padding: 1.15rem;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  font-size: 0.92rem;
  text-align: right;
  transition: background 180ms ease, padding 180ms ease;
}
.topic-cloud span::before { content: counter(topics, decimal-leading-zero); align-self: flex-start; color: var(--muted); font-size: var(--text-xs); font-weight: var(--weight-bold); }
.topic-cloud span:nth-child(3n + 2) { background: rgba(244,108,101,0.055); }
.topic-cloud span:hover { padding: 1.15rem 1.45rem; background: var(--course-soft); }
.section-action,
.section-action:visited {
  gap: 0.75rem;
  margin-top: 2rem;
  color: var(--ink);
  background: var(--course-tint);
  border-color: transparent;
}
.section-action::after { content: "↓"; font-size: 1rem; }
.section-action:hover { color: var(--ink); background: var(--coral-soft); border-color: transparent; }

.curriculum-section {
  width: min(var(--max), 90vw);
  padding-inline: clamp(1.5rem, 5vw, 5rem);
  color: var(--ink);
  background: var(--course-soft);
  border-radius: var(--radius-large);
}
.curriculum-section .split-heading > p { color: var(--muted); }
.curriculum-list { display: grid; gap: 0; overflow: hidden; background: rgba(255,255,255,0.72); border: 1px solid rgba(23,23,23,0.09); border-radius: var(--radius-medium); }
.curriculum-list details { background: transparent; border: 0; border-bottom: 1px solid rgba(23,23,23,0.1); border-radius: 0; transition: background 180ms ease; }
.curriculum-list details:last-child { border-bottom: 0; }
.curriculum-list details[open] { background: var(--white); }
.curriculum-list summary {
  display: grid;
  grid-template-columns: 6.5rem 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1.25rem 1.35rem;
  cursor: pointer;
  list-style: none;
}
.curriculum-list summary::-webkit-details-marker { display: none; }
.curriculum-list summary::after { content: "+"; font-size: var(--text-lead); font-weight: var(--weight-regular); }
.curriculum-list details[open] summary::after { content: "−"; }
.curriculum-list summary span { color: var(--muted); font-size: var(--text-xs); font-weight: var(--weight-bold); letter-spacing: 0.08em; text-transform: uppercase; }
.curriculum-list summary strong { font-size: var(--text-lead); font-weight: var(--weight-medium); }
.curriculum-list summary:hover { background: rgba(255,255,255,0.65); }
.week-content { padding: 0 1.35rem 1.4rem 8.85rem; }
.week-content p { max-width: 72ch; color: var(--muted); }
.week-content b { color: var(--ink); }

.project-list {
  counter-reset: projects;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}
.project-list li {
  counter-increment: projects;
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 138px;
  padding: 1.5rem 1.5rem 1.5rem 4.8rem;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  font-size: var(--text-lead);
  transition: background 180ms ease, padding 180ms ease;
}
.project-list li:nth-child(odd) { border-right: 1px solid var(--line); }
.project-list li:hover { padding-left: 5.2rem; background: var(--course-soft); }
.project-list li::before {
  content: counter(projects, decimal-leading-zero);
  position: absolute;
  top: 1.4rem;
  left: 1.4rem;
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  margin: 0;
  color: var(--ink);
  background: var(--coral-soft);
  border-radius: 50%;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
}

.ai-section {
  width: min(var(--max), 90vw);
  display: grid;
  grid-template-columns: 1fr 0.7fr;
  gap: clamp(3rem, 8vw, 8rem);
  padding-inline: clamp(2rem, 6vw, 6rem);
  background: var(--coral-soft);
  border-radius: var(--radius-large);
}
.ai-section h2 { max-width: 11ch; }
.simple-tag-list { margin-top: 1.5rem; }

.learning-flow {
  counter-reset: learning;
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  padding: 0;
  margin: 0 0 1.8rem;
  list-style: none;
}
.learning-flow::before { content: ""; position: absolute; top: 1.35rem; right: 7%; left: 7%; height: 2px; background: var(--line); }
.learning-flow li {
  counter-increment: learning;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 1rem;
  min-height: 105px;
  padding: 0 0.55rem;
  background: transparent;
  border-radius: 0;
  text-align: center;
  font-size: 0.9rem;
  font-weight: var(--weight-medium);
}
.learning-flow li:nth-child(even) { background: transparent; }
.learning-flow li::before {
  content: counter(learning, decimal-leading-zero);
  z-index: 1;
  display: grid;
  place-items: center;
  width: 2.7rem;
  height: 2.7rem;
  color: var(--ink);
  background: var(--course-tint);
  border: 5px solid var(--paper);
  border-radius: 50%;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
}
.experience-line { padding-top: 1.2rem; border-top: 1px solid var(--line); }
.experience-line span { background: var(--white); }

.requirements-layout {
  display: grid;
  grid-template-columns: 0.75fr 1fr;
  gap: clamp(3rem, 8vw, 8rem);
}
.requirement-lines { counter-reset: requirements; display: grid; gap: 0; overflow: hidden; background: var(--course-soft); border-radius: var(--radius-medium); }
.requirement-lines article {
  counter-increment: requirements;
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.15rem 1rem;
  min-height: 132px;
  padding: 1.5rem;
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(23,23,23,0.13);
  border-radius: 0;
}
.requirement-lines article:last-child { border-bottom: 0; }
.requirement-lines article:nth-child(even) { background: rgba(255,255,255,0.36); }
.requirement-lines article::before {
  content: counter(requirements, decimal-leading-zero);
  grid-row: 1 / 3;
  color: var(--muted);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
}
.requirement-lines h3 { font-size: var(--text-lead); letter-spacing: -0.025em; }
.requirement-lines p { grid-column: 2; margin: 0.5rem 0 0; color: var(--muted); }

.career-outcome-section {
  padding-inline: clamp(2rem, 6vw, 6rem);
  color: var(--ink);
  background: var(--sage);
  border: 0;
  border-radius: var(--radius-large);
}
.career-outcome-section h2 { max-width: 11ch; }
.role-list { display: flex; flex-wrap: wrap; gap: 0.55rem; padding: 0; margin: 0; list-style: none; }
.role-list li { padding: 0.65rem 0.85rem; background: rgba(255,255,255,0.58); border-radius: 999px; font-size: var(--text-xs); font-weight: var(--weight-medium); }

.registration-section {
  width: min(var(--max), 90vw);
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1fr);
  gap: clamp(3rem, 8vw, 8rem);
  padding-inline: clamp(2rem, 6vw, 6rem);
  background: var(--blue);
  border-radius: var(--radius-large);
}
.registration-intro { min-width: 0; }
.registration-price {
  max-width: 100%;
  margin: 0;
  font-size: clamp(2.75rem, 5vw, 4.8rem);
  font-weight: var(--weight-medium);
  letter-spacing: -0.06em;
  line-height: 0.98;
}
.registration-installment { margin: 0.65rem 0 1.5rem; color: #4f4d48; font-size: var(--text-lead); }
.registration-facts { margin-bottom: 2.5rem; border-top: 1px solid rgba(23,23,23,0.18); }
.registration-facts p { display: flex; justify-content: space-between; gap: 1rem; max-width: none; margin: 0; padding: 0.8rem 0; border-bottom: 1px solid rgba(23,23,23,0.18); font-size: 0.84rem; }
.registration-facts span { color: #4f4d48; }
.registration-facts strong { max-width: 21ch; text-align: right; }
.registration-intro h2 { margin-top: 0; font-size: var(--text-subhead); letter-spacing: -0.04em; }
.registration-intro > p:last-child { color: #4f4d48; }
.registration-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.registration-form label { display: grid; gap: 0.45rem; font-size: 0.86rem; font-weight: var(--weight-medium); }
.registration-form input,
.registration-form select,
.registration-form textarea {
  width: 100%;
  min-height: 52px;
  padding: 0.85rem 1rem;
  color: var(--ink);
  background: rgba(255,255,255,0.82);
  border: 1px solid transparent;
  border-radius: 0.8rem;
}
.registration-form input:focus { background: var(--white); border-color: var(--coral); outline: 0; }
.registration-form input[aria-invalid="true"] { background: #fff5f4; border-color: #9f2f27; }
.registration-form textarea { resize: vertical; }
.registration-form .full-field { grid-column: 1 / -1; }
.registration-form button { justify-self: start; cursor: pointer; }
.form-note, .form-status { color: #4f4d48; font-size: var(--text-xs); }
.form-status.is-error { color: #7f241f; font-weight: var(--weight-medium); }
.form-status.is-success { color: #245b35; font-weight: var(--weight-medium); }
.registration-form label span { color: var(--muted); font-size: var(--text-xs); font-weight: var(--weight-regular); }
.simple-registration-form { grid-template-columns: 1fr; }
.simple-registration-form .full-field { grid-column: 1; }

.faq-list { display: grid; gap: 0; overflow: hidden; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-medium); }
.faq-list details { padding: 0 1.5rem; background: transparent; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; }
.faq-list details:last-child { border-bottom: 0; }
.faq-list summary { padding: 1.25rem 0; cursor: pointer; font-size: var(--text-lead); font-weight: var(--weight-medium); }
.faq-list p { padding-bottom: 1rem; color: var(--muted); }

.curriculum-section + .section-rule { border-top: 0; }

.course-final-cta {
  width: min(var(--max), 90vw);
  padding-inline: clamp(2rem, 6vw, 6rem);
  text-align: center;
  color: var(--ink);
  background: var(--coral);
  border-radius: var(--radius-large);
}
.course-final-cta h2, .course-final-cta p { margin-left: auto; margin-right: auto; }
.course-final-cta .eyebrow { color: var(--ink); }
.course-final-cta h2 { max-width: 12ch; }
.course-final-cta > p:not(.eyebrow) { font-size: var(--text-lead); }

@media (max-width: 960px) {
  .course-header { grid-template-columns: 1fr auto; padding-inline: 5vw; }
  .course-nav { display: none; }
  .course-hero, .ai-section, .registration-section, .requirements-layout { grid-template-columns: 1fr; }
  .course-hero { min-height: auto; }
  .course-price-panel { min-height: 300px; }
  .learning-flow { grid-template-columns: repeat(6, 1fr); }
}

@media (max-width: 680px) {
  .course-header { min-height: 66px; }
  .course-header .button { min-height: 40px; padding: 0.55rem 0.85rem; }
  .course-hero { padding-top: 8.5rem; }
  .course-price-panel { min-height: 250px; border-radius: var(--radius-medium); }
  .curriculum-section, .ai-section, .career-outcome-section, .registration-section, .course-final-cta { width: 90vw; padding-inline: 1.25rem; border-radius: var(--radius-medium); }
  .curriculum-list summary { grid-template-columns: 4.5rem 1fr auto; padding-inline: 1rem; }
  .week-content { padding: 0 1rem 1.2rem; }
  .plain-audience-list, .topic-cloud, .project-list, .registration-form { grid-template-columns: 1fr; }
  .project-list li:nth-child(odd) { border-right: 0; }
  .learning-flow { grid-template-columns: 1fr; padding-left: 0.2rem; }
  .learning-flow::before { top: 1.35rem; bottom: 1.35rem; left: 1.35rem; width: 2px; height: auto; }
  .learning-flow li { flex-direction: row; justify-content: flex-start; min-height: 74px; padding: 0; text-align: left; }
  .learning-flow li::before { flex: 0 0 2.7rem; }
  .registration-form .full-field { grid-column: 1; }
}