.chapter-media{margin:0;background:var(--white);display:flex;flex-direction:column}.chapter-media__sheet{aspect-ratio:4 / 3;background:var(--paper);overflow:hidden}.chapter-media__sheet img,.chapter-media__sheet model-viewer{display:block;width:100%;height:100%}.chapter-media__sheet img{object-fit:contain}.chapter-media__sheet model-viewer{--poster-color: transparent}.chapter-media__fallback{height:100%;display:flex;align-items:center;justify-content:center;padding:var(--space-4);text-align:center;font-size:.875rem;color:var(--slate)}.chapter-media__caption{display:flex;justify-content:space-between;gap:var(--space-3);flex-wrap:wrap;padding:var(--space-2) var(--space-3);border-top:1px solid var(--line)}.chapter-media__hint{text-transform:none;letter-spacing:0}.chapter-media:not(:has(model-viewer)) .chapter-media__hint{display:none}.course-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}.course-hero__grid-bg{position:absolute;top:0;right:0;bottom:0;left:0;-webkit-mask-image:linear-gradient(to bottom,black,transparent 85%);mask-image:linear-gradient(to bottom,black,transparent 85%)}.course-hero__inner{position:relative;padding-top:var(--space-16);padding-bottom:var(--space-16);max-width:760px}.course-hero__title{font-size:clamp(1.75rem,3.5vw,2.75rem);margin-top:var(--space-2);margin-bottom:var(--space-4)}.course-hero__desc{font-size:1.0625rem;margin-bottom:var(--space-5)}.course-hero__meta{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-bottom:var(--space-6)}.course-hero__badge{display:inline-block;font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink);border:1px solid var(--line-strong);border-radius:var(--radius-sm);padding:.25rem .625rem}.course-hero__badge--accent{color:var(--white);background:var(--accent);border-color:var(--accent)}.course-detail__grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(260px,1fr);gap:var(--space-12);align-items:start}.course-detail__main{display:flex;flex-direction:column;gap:var(--space-10);min-width:0}.course-detail__block h2{font-size:1.375rem;margin-bottom:var(--space-4)}.course-detail__list{display:flex;flex-direction:column;gap:var(--space-2)}.course-detail__list li{position:relative;padding-left:var(--space-5);color:var(--slate)}.course-detail__list li:before{content:"";position:absolute;left:0;top:.55em;width:6px;height:6px;background:var(--accent)}.syllabus-list{display:flex;flex-direction:column}.syllabus-list__item{padding:var(--space-4) 0;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:var(--space-1)}.syllabus-list__body{display:flex;flex-direction:column;gap:var(--space-1);min-width:0}.syllabus-list__item--media{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:var(--space-6);align-items:start}@media (max-width: 640px){.syllabus-list__item--media{grid-template-columns:1fr;gap:var(--space-4)}}.syllabus-list__title{font-weight:600;color:var(--ink)}.syllabus-list__desc{font-size:.9375rem}.syllabus-list__desc p{margin-bottom:.5em}.syllabus-list__desc p:last-child{margin-bottom:0}.syllabus-list__desc ul{margin:0 0 .5em;padding-left:1.25em;list-style:disc;color:var(--slate)}.skill-tags{display:flex;flex-wrap:wrap;gap:var(--space-2)}.skill-tag{padding:.375rem .75rem;border:1px solid var(--line-strong);border-radius:var(--radius-sm);font-size:.8125rem;font-weight:500;color:var(--ink)}.testimonial-list{display:flex;flex-direction:column;gap:var(--space-5)}.testimonial-card{display:flex;gap:var(--space-4);margin:0;padding:var(--space-5);border:1px solid var(--line);background:var(--white)}.testimonial-card__photo{flex-shrink:0;width:48px;height:48px;border-radius:50%;object-fit:cover}.testimonial-card__photo--placeholder{display:flex;align-items:center;justify-content:center;background:var(--accent);color:var(--white);font-family:var(--font-display);font-stretch:var(--font-display-stretch);font-weight:700}.testimonial-card__text{color:var(--ink);margin-bottom:var(--space-2)}.testimonial-card__name{font-style:normal;font-size:.875rem;font-weight:600;color:var(--slate)}.faq-list{display:flex;flex-direction:column}.faq-item{padding:var(--space-4) 0;border-bottom:1px solid var(--line)}.faq-item__question{cursor:pointer;font-weight:600;color:var(--ink);list-style:none}.faq-item__question::-webkit-details-marker{display:none}.faq-item__question:before{content:"+";display:inline-block;width:1em;color:var(--accent);font-weight:700}.faq-item[open] .faq-item__question:before{content:"−"}.faq-item__answer{margin-top:var(--space-2);padding-left:1em;color:var(--slate)}.course-detail__sidebar{background:var(--white);padding:var(--space-6);position:sticky;top:calc(var(--header-height) + var(--space-6));display:flex;flex-direction:column;gap:var(--space-4)}.course-price{display:flex;flex-direction:column;gap:var(--space-2);padding-bottom:var(--space-4);border-bottom:1px solid var(--line)}.course-price__row{display:flex;align-items:baseline;gap:var(--space-3);flex-wrap:wrap}.course-price__current{font-family:var(--font-display);font-stretch:var(--font-display-stretch);font-size:1.75rem;font-weight:700;color:var(--ink)}.course-price__original{font-size:1.0625rem;color:var(--slate);text-decoration:line-through}.course-price__badges{display:flex;flex-wrap:wrap;gap:var(--space-2)}.course-price__badge{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;text-transform:uppercase;color:var(--white);background:var(--accent);border-radius:var(--radius-sm);padding:.25rem .625rem}.course-price__seats{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink);border:1px solid var(--line-strong);border-radius:var(--radius-sm);padding:.25rem .625rem}.course-price__seats--low{color:var(--white);background:#c0392b;border-color:#c0392b;animation:seats-low-blink 1.2s ease-in-out infinite}@keyframes seats-low-blink{0%,to{opacity:1}50%{opacity:.55}}@media (prefers-reduced-motion: reduce){.course-price__seats--low{animation:none}}.course-info{display:flex;flex-direction:column}.course-info__row{display:flex;flex-direction:column;gap:var(--space-1);padding:var(--space-3) 0;border-bottom:1px solid var(--line)}.course-info__row dt{font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.06em;text-transform:uppercase;color:var(--slate)}.course-info__row dd{margin:0;color:var(--ink);font-weight:500}.course-register .field__error{margin-bottom:var(--space-2)}@media (max-width: 900px){.course-detail__grid{grid-template-columns:1fr}.course-detail__sidebar{position:static}}.course-detail__links a{color:var(--accent);font-weight:600}.launch-banner{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:var(--space-2) var(--space-4);padding:var(--space-3) var(--space-4);background:var(--ink);color:var(--white);font-size:.9375rem;text-align:center}.launch-banner__tag{font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--accent-on-ink);color:var(--accent-on-ink);padding:.15rem .5rem}.launch-banner__cta{font-weight:600;color:var(--accent-on-ink);text-decoration:underline}