.course-reader .reveal{opacity:1;transform:none}.course-reader .inner-kicker,.course-reader .eyebrow{letter-spacing:.08em;font-size:14px}.course-reader-hero{padding-bottom:34px}.course-crumbs{color:var(--ink-2);flex-wrap:wrap;gap:8px;margin-bottom:24px;font-size:15px;line-height:1.5;display:flex}.course-crumbs a{color:var(--teal)}.course-reader-title{max-width:20ch;font-family:var(--serif);letter-spacing:-.035em;margin:0;font-size:clamp(40px,6vw,72px);line-height:1.05}.course-reader-lede{max-width:62ch;margin-top:18px}.course-reader-progress{max-width:680px;margin-top:26px}.course-reader-progress-copy{color:var(--ink-2);justify-content:space-between;gap:12px;font-size:15px;line-height:1.45;display:flex}.course-reader-progress-copy strong{color:var(--ink-2)}.course-reader-progress-track{background:var(--surface-3);border-radius:999px;height:9px;margin-top:8px;overflow:hidden}.course-reader-progress-track span{border-radius:inherit;background:linear-gradient(90deg, var(--teal), var(--blue));width:0;height:100%;transition:width .35s;display:block}.course-reader-grid{grid-template-columns:minmax(0,1fr) 300px;align-items:start;gap:clamp(32px,5vw,64px);padding-top:34px;padding-bottom:86px;display:grid}.course-reader-main{min-width:0;max-width:72ch}.course-reader-toolbar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:12px;padding-bottom:22px;display:flex}.course-reader-toolbar .btn{white-space:normal;overflow-wrap:anywhere;text-align:center;justify-content:center;align-items:center;gap:8px;min-width:0;line-height:1.4;display:inline-flex}.course-reader-toolbar .btn svg{flex:none}.course-lesson-content{color:var(--ink-2);font-size:18px;line-height:1.78}.course-lesson-content h2{color:var(--ink);font-family:var(--serif);margin:42px 0 14px;font-size:clamp(27px,4vw,36px);line-height:1.2}.course-lesson-content p{margin:0 0 18px}.course-lesson-content ul,.course-lesson-content ol{margin:0 0 22px;padding-left:24px}.course-lesson-content li{margin-bottom:9px}.course-lesson-content a{color:var(--teal);text-underline-offset:3px;font-weight:700;text-decoration:underline}.course-lesson-content blockquote{border-left:5px solid var(--teal);background:var(--surface-2);color:var(--ink);font-family:var(--serif);border-radius:0 14px 14px 0;margin:28px 0;padding:20px 22px;font-size:19px}.course-lesson-content blockquote p:last-child{margin-bottom:0}.course-lesson-content pre{color:#d9ecef;background:#071d25;border-radius:14px;max-width:100%;margin:24px 0;padding:20px;font-size:14px;line-height:1.7;overflow-x:auto}.course-lesson-content code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.course-reader-complete{border:1px solid var(--line-2);background:var(--surface);border-radius:18px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:24px;margin-top:44px;padding:26px;display:grid}.course-reader-complete h2{margin:4px 0 8px;font-size:26px}.course-reader-complete p:last-child{color:var(--ink-2);margin:0}[data-mark-lesson].is-complete{background:var(--surface-3);color:var(--teal);box-shadow:inset 0 0 0 1px var(--teal)}.course-reader-nav{grid-template-columns:1fr 1fr;gap:14px;margin-top:32px;display:grid}.course-reader-nav-link{border:1px solid var(--line-2);background:var(--surface);border-radius:14px;flex-direction:column;gap:5px;min-width:0;padding:18px;text-decoration:none;display:flex}.course-reader-nav-link.next{text-align:right}.course-reader-finish{gap:14px;display:grid}.course-reader-nav-link span{color:var(--teal);text-transform:uppercase;letter-spacing:.05em;font-size:14px;font-weight:800}.course-reader-nav-link strong{color:var(--ink);font-size:16px;line-height:1.45}.course-reader-side{top:calc(var(--header-compact-h) + 24px);gap:16px;display:grid;position:sticky}.reader-side-card{border:1px solid var(--line-2);background:var(--surface);border-radius:16px;padding:21px}.reader-side-card h2{margin:5px 0 16px;font-size:22px}.reader-artifacts{gap:10px;display:grid}.reader-artifacts label{color:var(--ink-2);cursor:pointer;grid-template-columns:22px 1fr;align-items:start;gap:10px;font-size:16px;line-height:1.55;display:grid}.reader-artifacts input{width:20px;height:20px;accent-color:var(--teal);margin:2px 0 0}.reader-side-note{color:var(--ink-2);margin:14px 0 0;font-size:15px;line-height:1.5}.reader-help-list{color:var(--ink-2);margin:12px 0 0;padding-left:20px;font-size:16px;line-height:1.65}.reader-help-list li{margin-bottom:8px}.reader-help-list a,.reader-hub-link{color:var(--teal);font-weight:700}.reader-hub-link{padding:4px 8px}@media (width<=920px){.course-reader-grid{grid-template-columns:1fr}.course-reader-main{max-width:none}.course-reader-side{grid-template-columns:repeat(2,minmax(0,1fr));position:static}.reader-hub-link{grid-column:1/-1}}@media (width<=640px){.course-reader-toolbar,.course-reader-complete{grid-template-columns:1fr;display:grid}.course-reader-toolbar .btn,.course-reader-complete .btn{justify-content:center;width:100%}.course-reader-nav{grid-template-columns:1fr}.course-reader-nav-link.next{text-align:left}.course-reader-side{grid-template-columns:1fr}.course-reader-hero{padding-top:calc(var(--header-h) + 44px)}.course-lesson-content{font-size:17px;line-height:1.75}.course-lesson-content pre{border-radius:10px;margin-inline:-8px;padding:16px;font-size:14px;line-height:1.65}}