*{margin:0;padding:0;box-sizing:border-box}:root{--bg-primary: #09090b;--bg-secondary: #18181b;--bg-tertiary: #27272a;--accent-primary: #14b8a6;--accent-hover: #0d9488;--accent-subtle: rgba(20, 184, 166, .1);--text-primary: #fafafa;--text-secondary: #a1a1aa;--text-muted: #52525b;--border-color: #27272a;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--spacing: 1rem}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{color:var(--text-primary);font-weight:500;letter-spacing:-.02em}h1{font-size:clamp(2.5rem,5vw,4rem);line-height:1.1;margin-bottom:1.5rem;font-weight:600}h2{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:1rem}h3{font-size:1.25rem;margin-bottom:.75rem;color:var(--text-primary)}p{color:var(--text-secondary);font-size:1rem;margin-bottom:1.5rem;max-width:65ch}.container{max-width:1000px;margin:0 auto;padding:0 1.5rem}.content-wrapper{max-width:720px;margin:0 auto}.progress-bar-container{position:fixed;top:0;left:0;right:0;height:2px;background-color:var(--bg-tertiary);z-index:100}.progress-bar-fill{height:100%;background-color:var(--accent-primary);transition:width .4s cubic-bezier(.4,0,.2,1);width:0%}.landing-page{min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:4rem 1.5rem;text-align:center}.hero-section{margin-bottom:5rem;max-width:800px}.hero-eyebrow{color:var(--accent-primary);font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;margin-bottom:1.5rem;display:block}.hero-subtitle{font-size:clamp(1.125rem,2vw,1.25rem);color:var(--text-secondary);margin:0 auto 3rem;font-weight:300}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;font-size:.9375rem;font-weight:500;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;transition:all .2s 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var(--bg-tertiary);border-radius:50%;font-size:.75rem;color:var(--text-muted);flex-shrink:0}.lesson-preview-title{font-size:.9375rem;color:var(--text-primary)}.check-icon{color:var(--accent-primary);margin-left:auto;font-size:.875rem}.lesson-page{padding-top:3rem;padding-bottom:6rem}.lesson-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;border-bottom:1px solid var(--border-color);padding-bottom:1rem}.lesson-counter{font-size:.8125rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em}.lesson-header h1{font-size:clamp(1.5rem,3vw,2.25rem);margin-bottom:2rem}.video-container{position:relative;width:100%;padding-bottom:56.25%;margin-bottom:3rem;background-color:#000;border-radius:var(--radius-sm);overflow:hidden}.video-container iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:none}.lesson-content{margin-bottom:3rem}.lesson-section{margin-bottom:2.5rem}.lesson-section h3{color:var(--accent-primary);font-size:1.125rem;margin-bottom:1rem}.lesson-bullets{list-style:none;padding-left:0}.lesson-bullets li{position:relative;padding-left:1.5rem;margin-bottom:.75rem;color:var(--text-secondary)}.lesson-bullets li:before{content:"•";color:var(--accent-primary);position:absolute;left:0;font-weight:700}.lesson-navigation{display:flex;justify-content:space-between;gap:1rem;margin:3rem 0;padding-top:2rem;border-top:1px solid var(--border-color)}.btn-nav{min-width:120px}.cta-card{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:1.5rem;display:flex;flex-direction:column;align-items:center;text-align:center;margin:2rem 0;gap:1rem}.cta-card h3{font-size:1rem;margin:0;color:var(--text-primary)}.cta-card p{font-size:.875rem;margin:0;color:var(--text-muted);max-width:400px}.cta-card-buttons{display:flex;gap:.75rem;margin-top:.5rem}@media (min-width: 640px){.cta-card{flex-direction:row;justify-content:space-between;text-align:left;padding:1.5rem 2rem}.cta-card h3,.cta-card p{text-align:left}.cta-card-content{flex:1}.cta-card-buttons{margin-top:0}}.sticky-bottom-bar{position:fixed;bottom:0;left:0;right:0;background-color:#09090bf2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-top:1px solid var(--border-color);padding:.75rem 1rem;z-index:50;display:flex;justify-content:center}.bottom-bar-content{display:flex;gap:.75rem;align-items:center}.what-next-page{padding:6rem 1.5rem;text-align:center;min-height:100vh}.celebration-icon{font-size:3rem;margin-bottom:2rem;color:var(--accent-primary)}.checklist{text-align:left;background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:2rem;margin:3rem 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h2{font-size:1rem;margin:0}.close-modal{background:none;border:none;color:var(--text-secondary);font-size:1.5rem;cursor:pointer}.course-map-content{padding:1.5rem}.level-indicator{text-align:center;margin-bottom:2rem;padding:1.5rem;background-color:var(--bg-secondary);border-radius:var(--radius-sm)}.level-badge{display:block;font-size:.875rem;text-transform:uppercase;letter-spacing:.1em;color:var(--accent-primary);margin-bottom:.5rem}.level-name{font-size:1.25rem;color:var(--text-primary);font-weight:600}.level-up-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background-color:#09090bf2;z-index:300;align-items:center;justify-content:center}.level-up-overlay.active{display:flex;animation:fadeIn .3s ease}.level-up-content{text-align:center}.level-up-icon{font-size:4rem;color:var(--accent-primary);margin-bottom:1rem}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}@keyframes 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