.course-page{padding:0 0 64px}.course-hero{position:relative;min-height:clamp(420px,62vh,580px);display:grid;align-items:end;margin-bottom:32px;overflow:hidden;color:#fff;background-color:#0b0e13;border-radius:0 0 var(--radius-xl) var(--radius-xl);isolation:isolate}.course-hero__backdrop{position:absolute;top:0;right:0;bottom:0;left:0;z-index:0;background-image:var(--gradient-hero),var(--course-image, var(--hero-image));background-position:center;background-size:cover;transform:scale(1.02)}.course-hero__backdrop:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,#07090d33,#07090de0 78%,#07090df5),radial-gradient(90% 70% at 0% 100%,rgba(79,124,255,.22),transparent 55%)}.course-hero__inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) min(340px,34vw);gap:28px;align-items:end;width:min(var(--container),calc(100% - 48px));margin-inline:auto;padding:clamp(72px,10vw,108px) 0 clamp(28px,4vw,44px)}.course-hero__content{max-width:760px;min-width:0}.course-hero__crumbs{display:inline-flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:18px;padding:6px 12px;color:#ffffffb8;font-family:var(--font-mono);font-size:.72rem;font-weight:var(--fw-medium);letter-spacing:.04em;text-transform:uppercase;background:#ffffff0f;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-pill);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.course-hero__crumbs a{color:#fff;transition:opacity var(--t-fast) var(--ease)}.course-hero__crumbs a:hover{opacity:.82}.course-hero__media{position:relative;min-height:220px;aspect-ratio:4 / 3;overflow:hidden;background:#ffffff0a;border:1px solid rgba(255,255,255,.14);border-radius:14px;box-shadow:0 24px 60px #0000006b,inset 0 1px #ffffff14}.course-hero__play{border:0;background:transparent;cursor:pointer}.course-hero h1{max-width:16ch;margin:0 0 14px;font-size:clamp(2rem,4.8vw,3.75rem);font-weight:var(--fw-black);line-height:.98;letter-spacing:var(--tracking-tighter);text-wrap:balance}.course-hero__desc{max-width:54ch;margin:0 0 22px;color:#ffffffc7;font-size:clamp(.95rem,1.4vw,1.06rem);line-height:1.55}.course-hero__meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}.course-hero__chip{display:inline-flex;align-items:center;gap:7px;min-height:34px;padding:0 12px;color:#ffffffe6;background:#ffffff12;border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-pill);font-size:.76rem;font-weight:var(--fw-semibold);line-height:1;white-space:nowrap;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.course-hero__chip svg{flex-shrink:0;opacity:.82}.course-hero__chip--rating{padding-inline:11px;background:#fbbf241f;border-color:#fbbf2447}.course-hero .ui-rating{gap:5px;color:#fbbf24;font-size:.8rem}.course-hero .ui-rating span{color:#fff;font-weight:var(--fw-bold)}.course-hero__instructor{display:inline-flex;align-items:center;gap:12px;max-width:100%;padding:10px 14px 10px 10px;color:#fff;background:#ffffff0f;border:1px solid rgba(255,255,255,.12);border-radius:12px;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);transition:background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease)}.course-hero__instructor:hover{background:#ffffff1a;border-color:#fff3;transform:translateY(-1px)}.course-hero__instructor-avatar{width:44px;height:44px;border-radius:10px;object-fit:cover;flex-shrink:0;border:1px solid rgba(255,255,255,.22)}.course-hero__instructor-avatar--ph{display:grid;place-items:center;color:#fff;background:var(--gradient-brand);font-weight:var(--fw-bold);font-size:1rem}.course-hero__instructor-copy{display:grid;gap:2px;min-width:0}.course-hero__instructor-label{color:#ffffff94;font-family:var(--font-mono);font-size:.66rem;font-weight:var(--fw-medium);letter-spacing:.1em;text-transform:uppercase}.course-hero__instructor-name{font-size:.95rem;font-weight:var(--fw-bold);line-height:1.2}.course-hero__instructor-chevron{width:8px;height:8px;margin-left:auto;border-top:2px solid rgba(255,255,255,.55);border-right:2px solid rgba(255,255,255,.55);transform:rotate(45deg);flex-shrink:0}.breadcrumbs{display:inline-flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;color:#ffffffa8;font-size:.86rem;font-weight:var(--fw-bold)}.breadcrumbs a{color:#fff}.breadcrumbs a:hover{text-decoration:underline}.stat-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}.stat-row span{padding:8px 12px;color:#ffffffd1;background:#ffffff17;border:1px solid rgba(255,255,255,.16);border-radius:var(--radius-pill);font-size:.78rem;font-weight:var(--fw-bold);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.instructor-row{display:flex;align-items:center;gap:13px}.instructor-row__avatar{width:50px;height:50px;border:2px solid rgba(255,255,255,.5);border-radius:var(--radius-md);object-fit:cover}.instructor-row__avatar--ph{display:grid;place-items:center;color:#fff;background:var(--gradient-brand);font-weight:var(--fw-bold)}.instructor-row__label{color:#ffffff94;font-size:.74rem;font-weight:var(--fw-bold);text-transform:uppercase;letter-spacing:.08em}.instructor-row__name{color:#fff;font-weight:var(--fw-bold)}.course-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:24px;align-items:start}.glass,.section-block,.purchase-card{background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft)}.section-block{padding:26px;margin-bottom:18px}.section-block h2{margin:0 0 14px;color:var(--ink);font-size:1.28rem;font-weight:var(--fw-bold);line-height:1.2;letter-spacing:var(--tracking-tight)}.section-block p{margin:0;color:var(--text-muted)}.check-list{display:grid;gap:12px;margin:0;padding:0;list-style:none}.check-list li{position:relative;padding-left:30px;color:var(--text-muted)}.check-list li:before{content:"";position:absolute;left:0;top:1px;width:21px;height:21px;background:var(--green);border-radius:var(--radius-pill);box-shadow:inset 0 0 0 4px var(--green-soft);-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Cpath stroke='%23000' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round' d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center / 11px 11px no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Cpath stroke='%23000' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round' d='M5 13l4 4L19 7'/%3E%3C/svg%3E") center / 11px 11px no-repeat}.purchase-card{position:sticky;top:calc(var(--nav-h) + 20px);padding:24px}.purchase-card__note{margin:14px 0 18px;color:var(--text-muted);font-size:.9rem}.purchase-card__trust{display:grid;gap:9px;margin:18px 0;padding:16px;color:var(--text-muted);background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-md);font-size:.84rem;font-weight:var(--fw-bold)}.purchase-card__trust span{display:flex;align-items:center;gap:10px}.purchase-card__trust svg{flex-shrink:0;color:var(--green)}.purchase-card__actions{display:grid;gap:10px}.mini-card{display:grid;grid-template-columns:118px minmax(0,1fr);gap:14px;padding:12px;background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);transition:transform var(--t-med) var(--ease),border-color var(--t-med) var(--ease),box-shadow var(--t-med) var(--ease)}.mini-card:hover{transform:translateY(-3px);border-color:var(--border-strong);box-shadow:var(--shadow-card)}.mini-card__thumb{position:relative;width:118px;align-self:stretch;min-height:118px;overflow:hidden;border-radius:var(--radius-md);background:var(--bg-3)}.mini-card__thumb img,.mini-card__thumb .image-placeholder{width:100%;height:100%;object-fit:cover}.mini-card__rating{position:absolute;top:8px;left:8px;padding:3px 7px;color:#fff;background:#0b0e13a8;border:1px solid rgba(255,255,255,.2);border-radius:var(--radius-pill);font-size:.7rem;font-weight:var(--fw-bold);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.mini-card__body{display:grid;align-content:start;gap:7px;min-width:0}.mini-card h4{margin:0;color:var(--ink);font-size:.96rem;font-weight:var(--fw-bold);line-height:1.3;letter-spacing:var(--tracking-tight)}.mini-card__author{margin:0;color:var(--text-muted);font-size:.82rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mini-card__meta{display:flex;flex-wrap:wrap;gap:6px 12px;color:var(--text-dim);font-size:.76rem;font-weight:var(--fw-bold)}.mini-card__price{margin-top:2px;color:var(--ink);font-size:.98rem;font-weight:var(--fw-bold);letter-spacing:var(--tracking-tight)}.related-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.course-related{padding-top:8px}.course-related .section__head{margin-bottom:22px}.course-related .section__lead{margin:8px 0 0;max-width:48ch;color:var(--text-muted);font-size:.92rem;line-height:1.55}.related-card{display:grid;grid-template-rows:auto 1fr;height:100%;color:inherit;text-decoration:none;background:linear-gradient(165deg,color-mix(in srgb,var(--surface-alt) 88%,transparent),color-mix(in srgb,var(--primary) 4%,transparent));border:1px solid color-mix(in srgb,var(--border) 70%,transparent);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-soft);transition:transform var(--t-med) var(--ease),border-color var(--t-med) var(--ease),box-shadow var(--t-med) var(--ease)}.related-card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--primary) 22%,var(--border-strong));box-shadow:var(--shadow-card)}.related-card__thumb{position:relative;aspect-ratio:16 / 10;overflow:hidden;background:var(--bg-3)}.related-card__thumb img,.related-card__thumb .image-placeholder{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease-out)}.related-card:hover .related-card__thumb img{transform:scale(1.04)}.related-card__scrim,.related-card__play{position:absolute;top:0;right:0;bottom:0;left:0}.related-card__scrim{background:linear-gradient(180deg,#0000 45%,#00000047);pointer-events:none}.related-card__play{display:grid;place-items:center;color:#fff;opacity:0;background:#0000003d;transition:opacity var(--t-fast) var(--ease)}.related-card:hover .related-card__play{opacity:1}.related-card__rating{position:absolute;z-index:3;top:10px;right:10px;display:inline-flex;align-items:center;padding:4px 9px;color:#fff;background:color-mix(in srgb,#0a0d12 52%,transparent);border:1px solid color-mix(in srgb,#fff 16%,transparent);border-radius:var(--radius-pill);font-size:.72rem;font-weight:var(--fw-bold);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);pointer-events:none}.related-card__thumb .badge{position:absolute;z-index:3;top:10px;left:10px}.related-card__body{display:grid;align-content:start;gap:6px;padding:14px 15px 16px;min-width:0}.related-card__category{font-family:var(--font-mono);font-size:.66rem;font-weight:var(--fw-medium);letter-spacing:.1em;text-transform:uppercase;color:color-mix(in srgb,var(--primary) 78%,var(--text-muted))}.related-card__title{display:-webkit-box;margin:0;color:var(--ink);font-size:.96rem;font-weight:var(--fw-bold);line-height:1.32;letter-spacing:var(--tracking-tight);-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.related-card__author{margin:0;color:var(--text-muted);font-size:.82rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.related-card__foot{display:flex;align-items:flex-end;justify-content:space-between;gap:10px;margin-top:6px;padding-top:12px;border-top:1px solid color-mix(in srgb,var(--border) 55%,transparent)}.related-card__meta{display:inline-flex;flex-wrap:wrap;align-items:center;gap:4px;min-width:0;color:var(--text-dim);font-size:.74rem;font-weight:var(--fw-semibold);line-height:1.35}.related-card__dot{opacity:.55}.related-card__price{flex-shrink:0;max-width:52%;color:var(--ink);font-size:.88rem;font-weight:var(--fw-bold);font-variant-numeric:tabular-nums;letter-spacing:var(--tracking-tight);text-align:right;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lesson-list{display:grid;gap:8px;margin:0;padding:0;list-style:none;counter-reset:none}.lesson-item{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:14px;padding:14px 16px;background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-md);transition:border-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease)}.lesson-item:hover{border-color:var(--border-strong);transform:translate(2px)}.lesson-item__num{display:grid;place-items:center;width:34px;height:34px;color:var(--primary);background:var(--blue-soft);border-radius:var(--radius-sm);font-size:.82rem;font-weight:var(--fw-bold);letter-spacing:var(--tracking-tight)}.lesson-item__body h4{margin:0;color:var(--ink);font-size:.96rem;font-weight:var(--fw-bold);line-height:1.3}.lesson-item__body p{margin:4px 0 0;color:var(--text-muted);font-size:.85rem}.lesson-item__time{color:var(--text-dim);font-size:.82rem;font-weight:var(--fw-bold);font-variant-numeric:tabular-nums}.review-list{display:grid;gap:14px}.review-card{padding:18px;background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-md)}.review-card__head{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;margin-bottom:12px}.review-card__avatar{width:44px;height:44px;border-radius:var(--radius-pill);object-fit:cover}.review-card__avatar--ph{display:grid;place-items:center;color:#fff;background:var(--gradient-brand);font-weight:var(--fw-bold)}.review-card__name{color:var(--ink);font-weight:var(--fw-bold);letter-spacing:var(--tracking-tight)}.review-card__date{margin-top:2px;color:var(--text-dim);font-size:.8rem;font-weight:var(--fw-bold)}.review-card__stars{color:var(--amber);font-size:.92rem;letter-spacing:1px;white-space:nowrap}.review-card__text{margin:0;color:var(--text-muted)}.video-modal{position:fixed;top:0;right:0;bottom:0;left:0;z-index:120;display:grid;place-items:center;padding:20px;animation:modal-fade var(--t-med) var(--ease)}.video-modal__backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:#06080cd1;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.video-modal__frame{position:relative;z-index:1;width:min(960px,100%);animation:modal-pop var(--t-med) var(--ease-out)}.video-modal__player{position:relative;width:100%;aspect-ratio:16 / 9;overflow:hidden;background:#000;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.video-modal__player iframe,.video-modal__player video{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:0}.video-modal__close{position:absolute;top:-52px;right:0;display:grid;place-items:center;width:40px;height:40px;color:#fff;background:#ffffff1f;border:1px solid rgba(255,255,255,.28);border-radius:var(--radius-pill);cursor:pointer;transition:background var(--t-fast) var(--ease)}.video-modal__close:hover{background:#ffffff3d}@media (max-width: 768px){.video-modal__close{top:-48px}}