.video-embed__card[data-astro-cid-2gmjvff3]{gap:var(--space-4);border:1px solid var(--color-border);border-radius:var(--chamfer);corner-shape:bevel;padding:var(--space-4);color:inherit;grid-template-columns:minmax(10rem,16rem) 1fr;align-items:start;text-decoration:none;display:grid}.video-embed__card[data-astro-cid-2gmjvff3]:hover{border-color:var(--color-accent)}.video-embed__thumb-wrap[data-astro-cid-2gmjvff3]{aspect-ratio:16/9;border-radius:var(--radius);background:var(--color-bg-raised);position:relative;overflow:hidden}.video-embed__thumb[data-astro-cid-2gmjvff3]{object-fit:cover;width:100%;height:100%;display:block}.video-embed__play[data-astro-cid-2gmjvff3]{font-size:var(--text-2xl);color:#fff;text-shadow:0 1px 4px #0009;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.video-embed__meta[data-astro-cid-2gmjvff3]{gap:var(--space-1);flex-direction:column;display:flex}.video-embed__title[data-astro-cid-2gmjvff3]{color:var(--color-text);font-weight:600}.video-embed__external[data-astro-cid-2gmjvff3]{opacity:.7;font-size:.85em}.video-embed__sr-only[data-astro-cid-2gmjvff3]{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.video-embed__channel[data-astro-cid-2gmjvff3],.video-embed__details[data-astro-cid-2gmjvff3]{font-size:var(--text-sm);color:var(--color-text-muted)}.video-embed__stale[data-astro-cid-2gmjvff3]{margin-top:var(--space-2);font-size:var(--text-sm);color:var(--color-warning-text);background:var(--color-warning-bg);border:1px solid var(--color-warning-border);border-radius:var(--radius);padding:var(--space-2) var(--space-3);max-width:fit-content}@media (width<=30rem){.video-embed__card[data-astro-cid-2gmjvff3]{grid-template-columns:1fr}}.go-deeper[data-astro-cid-4hcfgjda]{border:1px solid var(--color-border);border-radius:var(--chamfer);corner-shape:bevel;padding:var(--space-4);margin-block:var(--space-6)}.go-deeper__summary[data-astro-cid-4hcfgjda]{cursor:pointer;font-weight:600}.go-deeper__summary[data-astro-cid-4hcfgjda]:focus-visible{outline:var(--focus-ring-width) solid var(--color-focus-ring);outline-offset:var(--focus-ring-offset)}.go-deeper__list[data-astro-cid-4hcfgjda]{gap:var(--space-4);margin-top:var(--space-4);flex-direction:column;display:flex}.rail[data-astro-cid-ohwqzt66]{top:var(--header-h,4.75rem);z-index:90;background:var(--color-bg);margin-bottom:var(--space-6);padding-top:var(--space-4);position:sticky;overflow-x:auto}.rail__list[data-astro-cid-ohwqzt66]{gap:var(--space-2);padding:0 var(--space-1) var(--space-2);min-width:max-content;margin:0;list-style:none;display:flex}.rail__link[data-astro-cid-ohwqzt66]{border:1px solid var(--color-border);width:2.25rem;height:2.25rem;font-family:var(--font-display);font-size:var(--text-sm);color:var(--color-text-muted);background:0 0;border-radius:50%;justify-content:center;align-items:center;text-decoration:none;display:flex}.rail__item--done[data-astro-cid-ohwqzt66] .rail__link[data-astro-cid-ohwqzt66]{border-color:var(--brand-gold);color:var(--color-gold-text);box-shadow:0 0 0 2px var(--color-bg), 0 0 0 3px color-mix(in srgb, var(--brand-gold) 55%, transparent)}.rail__item--current[data-astro-cid-ohwqzt66] .rail__link[data-astro-cid-ohwqzt66]{background:var(--brand-gold);color:var(--brand-ink);border-color:var(--brand-gold);font-weight:700}.rail__link[data-astro-cid-ohwqzt66]:hover{border-color:var(--brand-gold)}.rail__sr[data-astro-cid-ohwqzt66]{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.lesson__header[data-astro-cid-ohwqzt66]{margin-bottom:var(--space-6)}.lesson__header[data-astro-cid-ohwqzt66] h1[data-astro-cid-ohwqzt66]{font-family:var(--font-display)}.lesson__draft-flag[data-astro-cid-ohwqzt66]{background:var(--color-warning-bg);color:var(--color-warning-text);border:1px solid var(--color-warning-border);border-radius:var(--radius);padding:var(--space-1) var(--space-3);font-size:var(--text-sm);font-weight:600;display:inline-block}.meta-panel[data-astro-cid-ohwqzt66]{margin:var(--space-5) 0 0;padding:var(--space-4);border:1px solid var(--color-border);border-radius:var(--chamfer);corner-shape:bevel;background:var(--color-bg-raised);gap:var(--space-3);display:grid}.meta-panel__row[data-astro-cid-ohwqzt66]{gap:var(--space-3);grid-template-columns:8rem 1fr;display:grid}.meta-panel[data-astro-cid-ohwqzt66] dt[data-astro-cid-ohwqzt66]{font-family:var(--font-mono);font-size:var(--text-sm);text-transform:uppercase;letter-spacing:.06em;color:var(--color-text-muted)}.meta-panel[data-astro-cid-ohwqzt66] dd[data-astro-cid-ohwqzt66]{margin:0}.meta-panel__row--outcome[data-astro-cid-ohwqzt66] dd[data-astro-cid-ohwqzt66]{font-weight:600}.meta-panel__prereqs[data-astro-cid-ohwqzt66]{color:var(--color-text-muted)}.meta-badge[data-astro-cid-ohwqzt66]{margin-right:var(--space-2);font-size:var(--text-sm);padding:0 var(--space-2);border:1px solid;border-radius:999px;font-weight:600;display:inline-block}.meta-badge--free[data-astro-cid-ohwqzt66]{color:var(--color-verified);border-color:color-mix(in srgb, var(--brand-green) 45%, transparent);background:color-mix(in srgb, var(--brand-green) 12%, transparent)}.meta-badge--cost[data-astro-cid-ohwqzt66]{color:var(--color-warning-text);border-color:var(--color-warning-border);background:var(--color-warning-bg)}@media (width<=34rem){.meta-panel__row[data-astro-cid-ohwqzt66]{gap:var(--space-1);grid-template-columns:1fr}}.lesson__body[data-astro-cid-ohwqzt66]{margin-top:var(--space-6)}.checkpoint[data-astro-cid-ohwqzt66]{margin-top:var(--space-7);padding:var(--space-4) var(--space-5);border:1px solid color-mix(in srgb, var(--brand-green) 40%, var(--color-border));border-left:4px solid var(--brand-green);border-radius:var(--chamfer);corner-shape:bevel;background:color-mix(in srgb, var(--brand-green) 8%, transparent)}.checkpoint__label[data-astro-cid-ohwqzt66]{margin:0 0 var(--space-1);font-family:var(--font-mono);font-size:var(--text-sm);text-transform:uppercase;letter-spacing:.06em;color:var(--color-verified)}.checkpoint__text[data-astro-cid-ohwqzt66]{margin:0}.lesson__nav[data-astro-cid-ohwqzt66]{justify-content:space-between;gap:var(--space-4);margin-top:var(--space-7);padding-top:var(--space-5);border-top:3px double var(--deco-rule);display:flex}.lesson__nav-link[data-astro-cid-ohwqzt66]{gap:var(--space-1);max-width:48%;color:var(--color-link);flex-direction:column;text-decoration:none;display:flex}.lesson__nav-link--next[data-astro-cid-ohwqzt66]{text-align:right;margin-left:auto}.lesson__nav-dir[data-astro-cid-ohwqzt66]{font-family:var(--font-mono);font-size:var(--text-sm);color:var(--color-text-muted)}.lesson__nav-title[data-astro-cid-ohwqzt66]{font-weight:600}