.course-sidebar.svelte-1gwfrv7{position:sticky;top:4rem;align-self:flex-start;max-height:calc(100vh - 4rem);width:280px;flex-shrink:0;display:flex;flex-direction:column;background:#fff;color:var(--ink);border-right:1px solid var(--border-brand);overflow:hidden;z-index:1}.course-sidebar.collapsed.svelte-1gwfrv7{width:48px}@media(max-width:900px){.course-sidebar.svelte-1gwfrv7{position:fixed;top:4rem;left:0;height:calc(100vh - 4rem);max-height:calc(100vh - 4rem);z-index:40;transform:translate(-100%);transition:transform .2s ease;box-shadow:0 10px 40px #0d0d121f}.course-sidebar.mobile-open.svelte-1gwfrv7{transform:translate(0)}}.sidebar-head.svelte-1gwfrv7{display:flex;align-items:center;justify-content:space-between;padding:1rem 1rem 1rem 1.25rem;border-bottom:1px solid var(--border-brand);gap:.5rem;flex-shrink:0;background:var(--paper)}.sidebar-brand.svelte-1gwfrv7{display:flex;flex-direction:column;gap:.1rem;color:var(--ink);text-decoration:none}.sidebar-brand.svelte-1gwfrv7:hover{text-decoration:none}.sidebar-eyebrow.svelte-1gwfrv7{font-family:var(--font-mono);font-size:.58rem;letter-spacing:.14em;text-transform:uppercase;color:var(--cobalt-600)}.sidebar-title.svelte-1gwfrv7{font-family:var(--font-display);font-size:1.05rem;font-weight:500;color:var(--ink);line-height:1.15}.course-sidebar.collapsed.svelte-1gwfrv7 .sidebar-brand:where(.svelte-1gwfrv7){display:none}.collapse-btn.svelte-1gwfrv7{background:#fff;border:1px solid var(--border-brand);color:var(--muted-brand);width:1.75rem;height:1.75rem;font-size:.9rem;cursor:pointer;flex-shrink:0;font-family:var(--font-mono);transition:color .15s ease,border-color .15s ease}.collapse-btn.svelte-1gwfrv7:hover{color:var(--cobalt-800);border-color:var(--cobalt-800)}.sidebar-nav.svelte-1gwfrv7{flex:1;min-height:0;overflow-y:auto;overflow-x:hidden;padding:.75rem 0 1.5rem;scrollbar-width:thin}.sidebar-nav.svelte-1gwfrv7::-webkit-scrollbar{width:6px}.sidebar-nav.svelte-1gwfrv7::-webkit-scrollbar-thumb{background:var(--border-brand)}.sidebar-nav.svelte-1gwfrv7::-webkit-scrollbar-thumb:hover{background:var(--muted-brand)}.nav-divider.svelte-1gwfrv7{font-family:var(--font-mono);font-size:.56rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted-brand);padding:1.1rem 1.25rem .4rem}.nav-item.top.svelte-1gwfrv7{display:flex;align-items:center;gap:.6rem;padding:.55rem 1.25rem;font-size:.8rem;color:var(--muted-brand);text-decoration:none}.nav-item.top.svelte-1gwfrv7:hover{background:var(--cobalt-50);color:var(--ink);text-decoration:none}.nav-item.top.active.svelte-1gwfrv7{color:var(--cobalt-800);background:var(--cobalt-50)}.nav-num.svelte-1gwfrv7{font-family:var(--font-mono);font-size:.62rem;color:var(--cobalt-600);min-width:1.5rem}.nav-module.svelte-1gwfrv7{display:flex;flex-direction:column}.nav-module.muted.svelte-1gwfrv7 .nav-num:where(.svelte-1gwfrv7){color:var(--muted-brand)}.nav-module-head.svelte-1gwfrv7{display:flex;align-items:center;gap:.6rem;padding:.55rem 1.25rem;background:transparent;border:0;width:100%;text-align:left;color:var(--ink);font-size:.82rem;font-family:inherit;cursor:pointer;border-left:2px solid transparent}.nav-module-head.active.svelte-1gwfrv7{color:var(--cobalt-800);border-left-color:var(--cobalt-800);background:var(--cobalt-50)}.nav-module-head.svelte-1gwfrv7:hover{background:var(--cobalt-50)}.nav-module-title.svelte-1gwfrv7{flex:1}.nav-chev.svelte-1gwfrv7{font-size:.7rem;color:var(--muted-brand);transition:transform .15s ease}.nav-chev.open.svelte-1gwfrv7{transform:rotate(90deg)}.nav-lessons.svelte-1gwfrv7{list-style:none;margin:0;padding:0;background:var(--paper)}.nav-lesson.svelte-1gwfrv7{display:flex;gap:.5rem;padding:.45rem 1.25rem .45rem 2.4rem;font-size:.75rem;color:var(--muted-brand);line-height:1.4;text-decoration:none;border-left:2px solid transparent}.nav-lesson.svelte-1gwfrv7:hover{color:var(--ink);background:var(--cobalt-50);text-decoration:none}.nav-lesson.active.svelte-1gwfrv7{color:var(--cobalt-800);background:var(--cobalt-50);border-left-color:var(--cobalt-800)}.nav-lesson.visited.svelte-1gwfrv7 .lesson-mark:where(.svelte-1gwfrv7){color:var(--cobalt-600)}.lesson-mark.svelte-1gwfrv7{font-family:var(--font-mono);font-size:.68rem;color:var(--border-brand);min-width:.8rem;flex-shrink:0}.lesson-text.svelte-1gwfrv7{flex:1}.sidebar-scrim.svelte-1gwfrv7{position:fixed;top:0;right:0;bottom:0;left:0;background:#0d0d1266;z-index:39;border:0;padding:0;cursor:pointer}@media(min-width:901px){.sidebar-scrim.svelte-1gwfrv7{display:none}}.progress.svelte-1dnabhe{position:sticky;top:4rem;z-index:20;background:var(--paper);border-bottom:1px solid var(--border-brand);padding:.6rem 1.25rem .5rem}.progress-meta.svelte-1dnabhe{display:flex;align-items:center;gap:.4rem;color:var(--muted-brand);margin-bottom:.45rem;flex-wrap:wrap}.mono.svelte-1dnabhe{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase}.sub.svelte-1dnabhe{color:#6b6880a6}.track.svelte-1dnabhe{width:100%;height:2px;background:var(--border-brand);position:relative;overflow:hidden}.fill.svelte-1dnabhe{height:100%;background:var(--cobalt-600);transition:width .3s ease}.shell.svelte-1jzo83k{display:flex;min-height:100vh;padding-top:4rem;background:var(--paper)}.main.svelte-1jzo83k{flex:1;min-width:0;display:flex;flex-direction:column}.column.svelte-1jzo83k{width:100%;max-width:680px;margin:0 auto;padding:2rem 1.5rem 5rem}@media(min-width:900px){.column.svelte-1jzo83k{padding:2.5rem 2rem 6rem}}.mobile-toggle.svelte-1jzo83k{display:none;margin:.75rem 1.25rem 0;padding:.45rem .85rem;border:1px solid var(--border-brand);background:#fff;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink);cursor:pointer;width:max-content}@media(max-width:900px){.mobile-toggle.svelte-1jzo83k{display:block}}.breadcrumb.svelte-1jzo83k{max-width:680px;margin:0 auto;padding:1.25rem 1.5rem .25rem;font-family:var(--font-mono);font-size:.65rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-brand);display:flex;gap:.45rem;flex-wrap:wrap;align-items:center}.breadcrumb.svelte-1jzo83k a:where(.svelte-1jzo83k){color:var(--cobalt-600);text-decoration:none}.breadcrumb.svelte-1jzo83k a:where(.svelte-1jzo83k):hover{color:var(--cobalt-800);text-decoration:none}.breadcrumb.svelte-1jzo83k .sep:where(.svelte-1jzo83k){color:#6b688080}.breadcrumb.svelte-1jzo83k .current:where(.svelte-1jzo83k){color:var(--ink)}@media(min-width:900px){.breadcrumb.svelte-1jzo83k{padding:1.5rem 2rem .25rem}}