.lesson-header.svelte-rya5k3.svelte-rya5k3{position:sticky;top:0;z-index:50;background-color:#f3eee5f2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid rgba(208,28,31,.15)}.lesson-header-content.svelte-rya5k3.svelte-rya5k3{display:flex;align-items:center;justify-content:space-between;padding:0 1rem;height:3.5rem}.header-back-btn.svelte-rya5k3.svelte-rya5k3,.header-menu-btn.svelte-rya5k3.svelte-rya5k3{display:flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;color:var(--color-black-light);text-decoration:none;border-radius:50%;transition:all .2s ease}.header-back-btn.svelte-rya5k3.svelte-rya5k3:hover,.header-menu-btn.svelte-rya5k3.svelte-rya5k3:hover{color:var(--color-red);background-color:#d01c1f1a}.header-title.svelte-rya5k3.svelte-rya5k3{font-family:var(--font-heading);font-size:1rem;font-weight:400;color:var(--color-red);letter-spacing:.05em;margin:0}.progress-bar-track.svelte-rya5k3.svelte-rya5k3{height:3px;background-color:#d01c1f26}.progress-bar-fill.svelte-rya5k3.svelte-rya5k3{height:100%;background-color:var(--color-red);transition:width .1s ease-out}.lesson-main.svelte-rya5k3.svelte-rya5k3{max-width:42rem;margin:0 auto;padding:0 1.25rem 5rem}.lesson-hero.svelte-rya5k3.svelte-rya5k3{padding:2rem 0}.lesson-meta.svelte-rya5k3.svelte-rya5k3{display:flex;align-items:center;gap:1rem;margin-bottom:1rem;flex-wrap:wrap}.lesson-badge.svelte-rya5k3.svelte-rya5k3{display:inline-block;padding:.25rem .625rem;background-color:#d01c1f1a;color:var(--color-red);font-family:var(--font-body);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em}.lesson-reading-time.svelte-rya5k3.svelte-rya5k3{display:flex;align-items:center;gap:.375rem;color:var(--color-black-light);font-size:.8125rem}.lesson-reading-time.svelte-rya5k3 svg.svelte-rya5k3{opacity:.7}.lesson-title.svelte-rya5k3.svelte-rya5k3{font-size:2.5rem;line-height:1.15;margin:0 0 .75rem;letter-spacing:-.01em}.lesson-author.svelte-rya5k3.svelte-rya5k3{font-style:italic;color:var(--color-black-light);margin:0 0 1.5rem;font-size:1.0625rem}.lesson-featured-image.svelte-rya5k3.svelte-rya5k3{position:relative;width:100%;margin:0 0 2rem;overflow:hidden;border:1px solid rgba(208,28,31,.2)}.lesson-featured-image.svelte-rya5k3 img.svelte-rya5k3{width:100%;height:auto;display:block}.lesson-featured-image.svelte-rya5k3 .image-overlay.svelte-rya5k3{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(to bottom,transparent 60%,rgba(0,0,0,.1));pointer-events:none}.lesson-description.svelte-rya5k3.svelte-rya5k3{font-size:1.1875rem;line-height:1.7;color:var(--color-black-light);margin:0}.lesson-article.svelte-rya5k3.svelte-rya5k3{padding-top:1rem}.lesson-content.svelte-rya5k3.svelte-rya5k3{font-size:1.0625rem;line-height:1.85;margin-bottom:2.5rem}.lesson-content.svelte-rya5k3 p{margin-bottom:1.5rem}.lesson-content.svelte-rya5k3 h2{margin-top:2.5rem;margin-bottom:1rem}.lesson-content.svelte-rya5k3 h3{margin-top:2rem;margin-bottom:.75rem}.lesson-callout.svelte-rya5k3.svelte-rya5k3{display:flex;gap:1rem;background-color:var(--color-cream);border:1px solid rgba(208,28,31,.15);border-left:4px solid var(--color-red);padding:1.25rem;margin:2rem 0}.callout-icon.svelte-rya5k3.svelte-rya5k3{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;background-color:#d01c1f1a;color:var(--color-red);border-radius:.5rem}.callout-content.svelte-rya5k3 h3.svelte-rya5k3{margin:0 0 .75rem;font-size:1.125rem}.callout-content.svelte-rya5k3 ul.svelte-rya5k3{margin:0;padding-left:1.25rem}.callout-content.svelte-rya5k3 li.svelte-rya5k3{margin-bottom:.375rem}.callout-content.svelte-rya5k3 p.svelte-rya5k3{margin:0}.lesson-section.svelte-rya5k3.svelte-rya5k3{margin:3rem 0}.lesson-section.svelte-rya5k3 h2.svelte-rya5k3{margin-bottom:1rem}.section-subtitle.svelte-rya5k3.svelte-rya5k3{color:var(--color-black-light);margin-bottom:1.5rem}.concept-card.svelte-rya5k3.svelte-rya5k3{position:relative;display:flex;gap:1rem;background-color:var(--color-cream);border:1px solid rgba(208,28,31,.15);padding:1.25rem;margin-bottom:1rem;overflow:hidden}.concept-accent.svelte-rya5k3.svelte-rya5k3{position:absolute;top:0;left:0;width:4px;height:100%;background-color:var(--color-red)}.concept-icon.svelte-rya5k3.svelte-rya5k3{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;background-color:#d01c1f1a;color:var(--color-red);border-radius:.5rem}.concept-content.svelte-rya5k3 h4.svelte-rya5k3{font-family:var(--font-heading);font-size:1.125rem;color:var(--color-red);margin:0 0 .5rem;font-weight:400}.concept-explanation.svelte-rya5k3.svelte-rya5k3{font-size:.9375rem;line-height:1.7;color:var(--color-black-light)}.concept-explanation.svelte-rya5k3 p{margin:0}.concept-explanation.svelte-rya5k3 p+p{margin-top:.75rem}.assignment-card.svelte-rya5k3.svelte-rya5k3{background-color:#d01c1f0a;border:1px solid rgba(208,28,31,.2);padding:1.5rem}.assignment-header.svelte-rya5k3.svelte-rya5k3{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem;color:var(--color-red)}.assignment-header.svelte-rya5k3 h3.svelte-rya5k3{margin:0;font-size:1.25rem}.assignment-body.svelte-rya5k3.svelte-rya5k3{margin-bottom:1.25rem;line-height:1.75}.assignment-body.svelte-rya5k3 p{margin:0 0 .75rem}.assignment-link.svelte-rya5k3.svelte-rya5k3{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-body);font-size:.9375rem;font-weight:700;padding:.75rem 1.25rem;background-color:var(--color-red);color:var(--color-cream);text-decoration:none;transition:all .2s ease}.assignment-link.svelte-rya5k3.svelte-rya5k3:hover{background-color:var(--color-red-dark);color:var(--color-cream)}.knowledge-check-section.svelte-rya5k3.svelte-rya5k3{background-color:#d01c1f0a;border:1px solid rgba(208,28,31,.15);padding:1.5rem}.knowledge-check-header.svelte-rya5k3.svelte-rya5k3{display:flex;align-items:center;gap:.75rem;margin-bottom:.5rem;color:var(--color-red)}.knowledge-check-header.svelte-rya5k3 h3.svelte-rya5k3{margin:0;font-size:1.25rem}.knowledge-check-intro.svelte-rya5k3.svelte-rya5k3{color:var(--color-black-light);margin:0 0 1.25rem;font-size:.9375rem}.knowledge-check-questions.svelte-rya5k3.svelte-rya5k3{display:flex;flex-direction:column;gap:.75rem}.question-card.svelte-rya5k3.svelte-rya5k3{display:flex;gap:1rem;background-color:var(--color-cream);border:1px solid rgba(208,28,31,.12);padding:1rem}.question-number.svelte-rya5k3.svelte-rya5k3{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:1.75rem;height:1.75rem;background-color:#d01c1f1a;color:var(--color-red);font-family:var(--font-body);font-weight:700;font-size:.8125rem}.question-content.svelte-rya5k3.svelte-rya5k3{flex:1}.question-text.svelte-rya5k3.svelte-rya5k3{font-weight:500;margin:0;line-height:1.6}.question-hint.svelte-rya5k3.svelte-rya5k3{font-size:.875rem;color:var(--color-black-light);margin:.5rem 0 0;font-style:italic}.question-hint.svelte-rya5k3 strong.svelte-rya5k3{font-style:normal}.resources-grid.svelte-rya5k3.svelte-rya5k3{display:flex;flex-direction:column;gap:.75rem}.resource-card.svelte-rya5k3.svelte-rya5k3{background-color:var(--color-cream);border:1px solid rgba(208,28,31,.15);padding:1rem 1.25rem;transition:all .2s ease}.resource-card.svelte-rya5k3.svelte-rya5k3:hover{border-color:var(--color-red);box-shadow:0 2px 8px #d01c1f1a}.resource-card.svelte-rya5k3 h4.svelte-rya5k3{font-family:var(--font-heading);font-size:1.0625rem;color:var(--color-red);margin:0 0 .25rem;font-weight:400}.resource-card.svelte-rya5k3 h4 a.svelte-rya5k3{display:inline-flex;align-items:center;gap:.375rem;text-decoration:none}.resource-card.svelte-rya5k3 h4 a.svelte-rya5k3:hover{text-decoration:underline}.resource-author.svelte-rya5k3.svelte-rya5k3{font-size:.875rem;color:var(--color-black-light);font-style:italic;margin:0 0 .375rem}.resource-description.svelte-rya5k3.svelte-rya5k3{font-size:.9375rem;margin:0;color:var(--color-black-light)}.lesson-navigation.svelte-rya5k3.svelte-rya5k3{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin-top:3rem;padding-top:2rem;border-top:1px solid rgba(208,28,31,.2)}.nav-prev.svelte-rya5k3.svelte-rya5k3,.nav-next.svelte-rya5k3.svelte-rya5k3{display:flex;flex-direction:column;text-decoration:none;padding:.5rem 0}.nav-prev.svelte-rya5k3.svelte-rya5k3{align-items:flex-start;text-align:left}.nav-next.svelte-rya5k3.svelte-rya5k3{align-items:flex-end;text-align:right}.nav-label.svelte-rya5k3.svelte-rya5k3{font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--color-black-light);margin-bottom:.25rem}.nav-next.svelte-rya5k3 .nav-label.svelte-rya5k3{color:var(--color-red);font-weight:600}.nav-title.svelte-rya5k3.svelte-rya5k3{display:flex;align-items:center;gap:.5rem;font-family:var(--font-heading);font-size:1.125rem;color:var(--color-black);font-weight:400;transition:transform .2s ease}.nav-prev.svelte-rya5k3:hover .nav-title.svelte-rya5k3{transform:translate(-4px);color:var(--color-red)}.nav-next.svelte-rya5k3:hover .nav-title.svelte-rya5k3{transform:translate(4px);color:var(--color-red)}.nav-title.svelte-rya5k3 svg.svelte-rya5k3{flex-shrink:0}@media (max-width: 640px){.lesson-title.svelte-rya5k3.svelte-rya5k3{font-size:2rem}.lesson-navigation.svelte-rya5k3.svelte-rya5k3{grid-template-columns:1fr}.nav-next.svelte-rya5k3.svelte-rya5k3{align-items:flex-start;text-align:left;padding-top:1rem;border-top:1px solid rgba(208,28,31,.1)}.nav-next.svelte-rya5k3 .nav-title.svelte-rya5k3{flex-direction:row-reverse}.lesson-callout.svelte-rya5k3.svelte-rya5k3{flex-direction:column;gap:.75rem}.concept-card.svelte-rya5k3.svelte-rya5k3{flex-direction:column;gap:.75rem;padding-left:1.5rem}}