/* Student journey: discovery -> my learning -> focused lesson workspace. */
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rgba(0,43,130,.2)}.catalog-hero-art span:nth-child(1){width:154px;height:172px;left:52px;top:46px;transform:rotate(-8deg)}.catalog-hero-art span:nth-child(2){width:154px;height:172px;left:136px;top:62px;opacity:.82;transform:rotate(8deg)}.catalog-hero-art span:nth-child(3){width:58px;height:7px;left:76px;top:83px;background:#9cc5ff;box-shadow:0 18px 0 #d1e5ff,0 36px 0 #d1e5ff,0 54px 0 #d1e5ff}.public-catalog{border-top:0;margin:0 0 48px;padding-top:0}.catalog-heading{margin-bottom:20px}.catalog-heading h2{font-size:28px;color:#182430}.public-course-grid{gap:20px}.public-course-card{display:block;padding:0;border:1px solid #e1e7ef;border-radius:8px;overflow:hidden;transition:border-color .18s,box-shadow .18s}.public-course-card:hover{border-color:#8bb9f7;box-shadow:0 10px 30px rgba(36,84,150,.1)}.public-course-cover,.learning-card-cover{height:116px;position:relative;overflow:hidden;background:linear-gradient(130deg,#e6f1ff,#d6e7ff 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#e7ebf0;padding-top:24px}.learning-section-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:18px}.learning-section-head h2{font-size:24px;margin:0;color:#182430}.learning-section-head p{font-size:13px;margin:0;color:#8491a1}.learning-course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.learning-course-card{background:#fff;border:1px solid #e1e7ef;border-radius:8px;overflow:hidden;transition:border-color .18s,box-shadow .18s}.learning-course-card:hover{border-color:#8bb9f7;box-shadow:0 12px 28px rgba(32,83,150,.11)}.learning-card-cover{height:132px;background:linear-gradient(132deg,#f0f6ff,#dcecff)}.learning-card-body{padding:18px 20px}.learning-card-body h2{font-size:19px;line-height:1.35;margin:0 0 8px;color:#182430}.learning-card-body>p{font-size:13px;color:#68778a;min-height:44px;margin:0 0 18px}.course-progress{display:flex;align-items:center;gap:10px}.course-progress>div,.sidebar-progress span{height:5px;flex:1;background:#edf1f5;border-radius:99px;overflow:hidden}.course-progress i,.sidebar-progress i{display:block;height:100%;background:#0052d9;border-radius:inherit}.course-progress span{font-size:12px;color:#546274}.learning-card-foot{display:flex;justify-content:space-between;align-items:center;margin-top:12px}.learning-card-foot small{color:#8491a1}.learning-card-foot b{font-size:13px;color:#0052d9}.learning-empty{grid-column:1/-1;text-align:center;padding:70px 24px;background:#fff;border:1px dashed #cbd7e5;border-radius:8px}.empty-illustration{display:grid;place-items:center;width:48px;height:48px;border-radius:50%;margin:0 auto 15px;background:#e8f2ff;color:#0052d9;font-size:28px}.learning-empty h2{font-size:20px;margin:0;color:#182430}.learning-empty p{color:#68778a}.learning-layout{display:grid;grid-template-columns:296px minmax(0,1fr);gap:32px;align-items:start}.learner-sidebar{top:84px;padding:0;overflow:hidden;border-radius:8px}.learner-sidebar .sidebar-title{padding:18px 18px 16px;border-bottom:1px solid #e7ebf0}.learner-sidebar .sidebar-title>a{padding:0;background:none;color:#546274;font-size:12px;font-weight:600}.learner-sidebar .sidebar-title>b{display:block;color:#182430;line-height:1.4;margin:11px 0 13px}.sidebar-progress{display:flex;align-items:center;gap:8px}.sidebar-progress small{font-size:11px;color:#8491a1;white-space:nowrap}.learner-sidebar .lesson-section-label{padding:17px 18px 7px;color:#8491a1}.learner-sidebar>a{padding:10px 16px;gap:10px;border-radius:0;color:#4d5a6a}.learner-sidebar>a b{font-weight:600;line-height:1.42}.learner-sidebar>a.active{background:#e8f2ff;color:#0052d9}.learner-sidebar>a.complete{color:#506177}.learner-sidebar>a.complete .lesson-state{background:#e3f5ea;color:#00a870}.learner-sidebar>a.active .lesson-state{background:#0052d9;color:#fff}.learner-sidebar .lesson-state{display:grid;width:22px;height:22px;flex:0 0 22px;place-items:center;border-radius:50%;background:#f0f2f5;color:#8491a1;font-family:inherit;font-size:10px}.learner-content{max-width:860px;padding:2px 0 80px}.lesson-head{display:flex;justify-content:space-between;gap:24px;align-items:start;margin:0 0 25px}.learner-content h1{font-size:38px;margin:5px 0 0}.lesson-complete{flex:0 0 auto;border:1px solid #b7d2f6;border-radius:4px;background:#fff;color:#0052d9;padding:8px 12px;font:600 13px/1 inherit;cursor:pointer}.lesson-complete.is-complete{border-color:#b7e7cf;background:#f0fbf5;color:#00a870}.lesson-complete:disabled{opacity:.7}.learner-video{border-radius:8px;box-shadow:none}.player-tools{margin:10px 0 28px}.player-tools .button{border-radius:4px;background:#edf4ff;color:#0052d9}.learner-content .markdown{max-width:760px;color:#344154}.lesson-pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:58px;padding-top:22px;border-top:1px solid #e7ebf0}.lesson-pager a{display:flex;flex-direction:column;gap:4px;min-width:0;padding:13px 0}.lesson-pager a:last-child{text-align:right;align-items:end}.lesson-pager small{font-size:12px;color:#8491a1}.lesson-pager b{color:#0052d9;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.learner-error{margin-top:50px}@media(max-width:800px){.catalog-hero{grid-template-columns:1fr;padding:20px 0 42px;gap:30px}.catalog-hero-art{height:170px}.catalog-hero h1{font-size:39px}.public-course-grid,.learning-course-grid{grid-template-columns:1fr}.learning-dashboard-head{padding:5px 0 30px}.learning-dashboard-head h1{font-size:32px}.dashboard-orbit{display:none}.learning-layout{grid-template-columns:1fr;gap:16px}.learner-sidebar{position:static;display:block;padding:0}.learner-sidebar .sidebar-title{display:block}.learner-sidebar .lesson-section-label{display:block}.learner-sidebar>a{white-space:normal}.learner-content{padding-top:10px}.lesson-head{gap:12px}.learner-content h1{font-size:29px}.lesson-complete{padding:7px 9px;font-size:12px}.lesson-pager{gap:10px}.catalog-hero-actions{gap:13px;flex-wrap:wrap}}
.lesson-chapter{border-bottom:1px solid #edf0f3}.chapter-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px 10px;border:0;background:#fff;color:#344154;font:700 15px/1.4 inherit;text-align:left;cursor:pointer}.chapter-toggle i{color:#7b8797;font:700 18px/1 inherit;transition:transform .18s}.lesson-chapter.open .chapter-toggle i{transform:rotate(180deg)}.chapter-lessons{display:none;padding-bottom:8px}.lesson-chapter.open .chapter-lessons{display:block}.learner-sidebar .chapter-lessons>a{padding:10px 16px;gap:10px;border-radius:0;color:#4d5a6a}.learner-sidebar .chapter-lessons>a b{font-weight:600;line-height:1.42}.learner-sidebar .chapter-lessons>a.active{background:#e8f2ff;color:#0052d9}.learner-sidebar .chapter-lessons>a.complete{color:#506177}.learner-sidebar .chapter-lessons>a.complete .lesson-state{background:#e3f5ea;color:#00a870}.learner-sidebar .chapter-lessons>a.active .lesson-state{background:#0052d9;color:#fff}.learner-video,.video-placeholder{width:100%;aspect-ratio:16/9;min-height:0;border-radius:8px;box-shadow:none}.learner-video{background:#101820}.learner-video video{width:100%;height:100%;object-fit:contain}.video-placeholder{display:grid;place-items:center;background:#eef4fc;color:#738194;margin:0}.lesson-video-section,.lesson-notes-section{margin-top:30px}.lesson-video-section>h2,.lesson-notes-section>h2{margin:0 0 12px;color:#263446;font-size:18px}.lesson-notes-section{margin-top:42px;padding-top:26px;border-top:1px solid #e7ebf0}.lesson-head{display:block}.player-tools{margin:10px 0 0}@media(max-width:800px){.chapter-toggle{padding:15px 16px 9px}.lesson-video-section,.lesson-notes-section{margin-top:24px}}
.chapter-toggle span{display:flex;flex-direction:column;gap:2px}.chapter-toggle small{color:#8793a3;font-size:11px;font-weight:600}.learner-video{position:relative}.video-loading{position:absolute;inset:0;z-index:2;display:grid;place-items:center;align-content:center;gap:10px;background:linear-gradient(130deg,#111c2b,#162944);color:#d9e7f8;transition:opacity .25s}.video-loading span{width:36px;height:36px;border:3px solid rgba(255,255,255,.18);border-top-color:#fff;border-radius:50%;animation:videoSpin .9s linear infinite}.video-loading b{font-size:13px}.learner-video.is-ready .video-loading{opacity:0;pointer-events:none}@keyframes videoSpin{to{transform:rotate(360deg)}}.onpage-nav{position:sticky;top:88px;align-self:start;max-height:calc(100vh - 110px);overflow-y:auto;overflow-x:hidden;border-left:1px solid #e5eaf0;padding:4px 0 16px 18px;box-sizing:border-box;width:100%;scrollbar-width:none;-ms-overflow-style:none}.onpage-nav::-webkit-scrollbar{display:none;width:0;height:0}.onpage-nav h2{margin:0 0 12px;color:#5f6f83;font-size:14px}.onpage-nav nav{display:flex;flex-direction:column;gap:2px}.onpage-nav a{padding:4px 0;color:#78879a;font-size:13px;line-height:1.5;display:block;word-break:break-word;text-decoration:none}.onpage-nav a:hover{color:#0052d9}.onpage-nav .toc-level-1{font-weight:600;color:#475569}.onpage-nav .toc-level-2{padding-left:14px}.onpage-nav .toc-level-3{padding-left:26px;font-size:12px;color:#8996a6}.onpage-nav .toc-level-4{padding-left:36px;font-size:12px;color:#8996a6}@media(min-width:1180px){.learning-layout{grid-template-columns:260px minmax(0,1fr) 260px;gap:24px}}@media(min-width:1380px){.learning-layout{grid-template-columns:270px minmax(0,1fr) 280px;gap:32px}}@media(max-width:1179px){.onpage-nav{display:none}}@media(prefers-reduced-motion:reduce){.video-loading span{animation:none}}