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#6930c3;--reading-theme-accent-tertiary: #48bfe3;--reading-theme-border-subtle: rgba(150, 160, 210, .1);--reading-theme-border-card: rgba(150, 160, 210, .14);--reading-theme-border-active: rgba(94, 96, 206, .26);--reading-theme-accent-glow: rgba(94, 96, 206, .1)}[data-palette=neon-party]{--bg-primary: #050510;--bg-secondary: #070715;--bg-card: #0c0c1e;--bg-card-hover: #121228;--bg-surface: #080818;--bg-code: #0a0a1c;--text-primary: #e0e0f8;--text-secondary: #9090c0;--text-muted: #7676be;--text-heading: #f0f0ff;--accent-primary: #00ccff;--accent-secondary: #cc00ff;--accent-tertiary: #00ffcc;--accent-glow: rgba(0, 204, 255, .3);--border-subtle: rgba(0, 204, 255, .15);--border-card: rgba(0, 204, 255, .2);--border-active: rgba(0, 204, 255, .5);--gradient-hero: linear-gradient(135deg, #cc00ff 0%, #00ccff 35%, #00ffcc 65%, #ffff00 100%);--gradient-card: linear-gradient( 145deg, rgba(0, 204, 255, .08) 0%, rgba(204, 0, 255, .04) 100% );--gradient-glow: radial-gradient( 600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(0, 204, 255, .07), transparent 40% );--shadow-card: 0 4px 24px rgba(0, 0, 0, .4);--shadow-elevated: 0 8px 40px rgba(0, 0, 0, .5);--shadow-glow: 0 0 40px rgba(0, 204, 255, .2);--gradient-logo: linear-gradient(135deg, #cc00ff, #00ccff);--reading-bg-primary: #030308;--reading-bg-surface: #080818;--reading-bg-code: #0c0c1e;--reading-border-subtle: rgba(0, 204, 255, .1);--reading-border-card: rgba(0, 204, 255, .15);--reading-border-active: rgba(0, 204, 255, .35);--reading-accent-glow: rgba(0, 204, 255, .1);--text-on-accent: #04111a;--reading-theme-bg-primary: #030308;--reading-theme-bg-surface: #080818;--reading-theme-bg-card: #0c0c1e;--reading-theme-bg-card-hover: #121228;--reading-theme-bg-code: #0a0a1c;--reading-theme-accent-primary: #00ccff;--reading-theme-accent-secondary: #cc00ff;--reading-theme-accent-tertiary: #00ffcc;--reading-theme-border-subtle: rgba(0, 204, 255, .1);--reading-theme-border-card: rgba(0, 204, 255, .15);--reading-theme-border-active: rgba(0, 204, 255, .35);--reading-theme-accent-glow: rgba(0, 204, 255, .1)}[data-palette=deep-ocean-blue]{--bg-primary: #060e18;--bg-secondary: #091320;--bg-card: #0f1e2e;--bg-card-hover: #162638;--bg-surface: #0c1825;--bg-code: #0a1520;--text-primary: #c8e6e8;--text-secondary: #7ab0b5;--text-muted: #6c9aa1;--text-heading: #e0f0f2;--accent-primary: #42b7b3;--accent-secondary: #3d949b;--accent-tertiary: #48bfe3;--accent-glow: rgba(0, 100, 102, .3);--border-subtle: rgba(100, 180, 185, .12);--border-card: rgba(100, 180, 185, .18);--border-active: rgba(0, 100, 102, .45);--gradient-hero: linear-gradient(135deg, #006466 0%, #1b3a4b 40%, #272640 70%, #4d194d 100%);--gradient-card: linear-gradient(145deg, rgba(0, 100, 102, .1) 0%, rgba(39, 38, 64, .05) 100%);--gradient-glow: radial-gradient( 600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(0, 100, 102, .07), transparent 40% );--shadow-card: 0 4px 24px rgba(0, 0, 0, .35);--shadow-elevated: 0 8px 40px rgba(0, 0, 0, .45);--shadow-glow: 0 0 40px rgba(0, 100, 102, .2);--gradient-logo: linear-gradient(135deg, #006466, #4d194d);--reading-bg-primary: #04090f;--reading-bg-surface: #0c1825;--reading-bg-code: #0f1e2e;--reading-border-subtle: rgba(100, 180, 185, .1);--reading-border-card: rgba(100, 180, 185, .14);--reading-border-active: rgba(0, 100, 102, .3);--reading-accent-glow: rgba(0, 100, 102, .1);--text-on-accent: #031217;--reading-theme-bg-primary: #04090f;--reading-theme-bg-surface: #0c1825;--reading-theme-bg-card: #0f1e2e;--reading-theme-bg-card-hover: #162638;--reading-theme-bg-code: #0a1520;--reading-theme-accent-primary: #42b7b3;--reading-theme-accent-secondary: #3d949b;--reading-theme-accent-tertiary: #48bfe3;--reading-theme-border-subtle: rgba(100, 180, 185, .1);--reading-theme-border-card: rgba(100, 180, 185, .14);--reading-theme-border-active: rgba(0, 100, 102, .3);--reading-theme-accent-glow: rgba(0, 100, 102, .1)}[data-palette=pastel-dreamland]{--bg-primary: #faf7fd;--bg-secondary: #f4effa;--bg-card: #ede5f7;--bg-card-hover: #e4d9f2;--bg-surface: #f8f3fc;--bg-code: #f0eaf8;--text-primary: #3d2356;--text-secondary: #6a3e8c;--text-muted: #7d5b9a;--text-heading: #280e3e;--accent-primary: #6c4aa3;--accent-secondary: #8b4d6a;--accent-tertiary: #4b6f9f;--accent-glow: rgba(155, 114, 207, .28);--border-subtle: rgba(155, 114, 207, .18);--border-card: rgba(155, 114, 207, .25);--border-active: rgba(155, 114, 207, .5);--gradient-hero: linear-gradient(135deg, #cdb4db 0%, #ffc8dd 35%, #ffafcc 60%, #a2d2ff 100%);--gradient-card: linear-gradient( 145deg, rgba(155, 114, 207, .06) 0%, rgba(232, 120, 158, .03) 100% );--gradient-glow: radial-gradient( 600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(155, 114, 207, .04), transparent 40% );--shadow-card: 0 1px 3px rgba(100, 50, 150, .08);--shadow-elevated: 0 4px 16px rgba(100, 50, 150, .1);--shadow-glow: 0 0 20px rgba(155, 114, 207, .15);--gradient-logo: linear-gradient(135deg, #cdb4db, #a2d2ff);--reading-bg-primary: #f5f0fa;--reading-bg-surface: #faf7fd;--reading-bg-code: #f0eaf8;--reading-border-subtle: rgba(155, 114, 207, .14);--reading-border-card: rgba(155, 114, 207, .2);--reading-border-active: rgba(155, 114, 207, .44);--reading-accent-glow: rgba(155, 114, 207, .08);--text-on-accent: #ffffff;--text-on-brand: #280e3e;--reading-theme-bg-primary: #f5f0fa;--reading-theme-bg-surface: #faf7fd;--reading-theme-bg-card: #faf7fd;--reading-theme-bg-card-hover: #ede5f7;--reading-theme-bg-code: #f0eaf8;--reading-theme-accent-primary: #6c4aa3;--reading-theme-accent-secondary: #8b4d6a;--reading-theme-accent-tertiary: #4b6f9f;--reading-theme-border-subtle: rgba(155, 114, 207, .14);--reading-theme-border-card: rgba(155, 114, 207, .2);--reading-theme-border-active: rgba(155, 114, 207, .44);--reading-theme-accent-glow: rgba(155, 114, 207, .08)}[data-palette=golden-summer-fields]{--bg-primary: #fefae0;--bg-secondary: #faf5d0;--bg-card: #faedcd;--bg-card-hover: #f5e5b8;--bg-surface: #fdf8e8;--bg-code: #f5eccc;--text-primary: #3b2f10;--text-secondary: #6a5020;--text-muted: #86662e;--text-heading: #261e08;--accent-primary: #7f5b22;--accent-secondary: #654a1c;--accent-tertiary: #5d6f36;--accent-glow: rgba(184, 133, 58, .28);--border-subtle: rgba(180, 140, 80, .18);--border-card: rgba(180, 140, 80, .26);--border-active: rgba(184, 133, 58, .5);--gradient-hero: linear-gradient(135deg, #d4a373 0%, #e9edc9 35%, #fefae0 65%, #ccd5ae 100%);--gradient-card: linear-gradient( 145deg, rgba(212, 163, 115, .07) 0%, rgba(204, 213, 174, .04) 100% );--gradient-glow: radial-gradient( 600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(212, 163, 115, .04), transparent 40% );--shadow-card: 0 1px 3px rgba(100, 70, 20, .08);--shadow-elevated: 0 4px 16px rgba(100, 70, 20, .1);--shadow-glow: 0 0 20px rgba(212, 163, 115, .12);--gradient-logo: linear-gradient(135deg, #d4a373, #ccd5ae);--reading-bg-primary: #fdf7d8;--reading-bg-surface: #fefae0;--reading-bg-code: #f5eccc;--reading-border-subtle: rgba(180, 140, 80, .14);--reading-border-card: rgba(180, 140, 80, .2);--reading-border-active: rgba(184, 133, 58, .44);--reading-accent-glow: rgba(212, 163, 115, .08);--text-on-accent: #ffffff;--text-on-brand: #261e08;--reading-theme-bg-primary: #fdf7d8;--reading-theme-bg-surface: #fefae0;--reading-theme-bg-card: #fefae0;--reading-theme-bg-card-hover: #faedcd;--reading-theme-bg-code: #f5eccc;--reading-theme-accent-primary: #7f5b22;--reading-theme-accent-secondary: #654a1c;--reading-theme-accent-tertiary: #5d6f36;--reading-theme-border-subtle: rgba(180, 140, 80, .14);--reading-theme-border-card: rgba(180, 140, 80, .2);--reading-theme-border-active: rgba(184, 133, 58, .44);--reading-theme-accent-glow: rgba(212, 163, 115, .08)}[data-palette=light-steel]{--bg-primary: #f8f9fa;--bg-secondary: #e9ecef;--bg-card: #ffffff;--bg-card-hover: #dee2e6;--bg-surface: #f4f5f7;--bg-code: #e9ecef;--text-primary: #212529;--text-secondary: #495057;--text-muted: #5f6670;--text-heading: #0d1117;--accent-primary: #495057;--accent-secondary: #343a40;--accent-tertiary: #5f6670;--accent-glow: rgba(73, 80, 87, .2);--border-subtle: rgba(73, 80, 87, .12);--border-card: rgba(73, 80, 87, .18);--border-active: rgba(73, 80, 87, .42);--gradient-hero: linear-gradient(135deg, #495057 0%, #6c757d 35%, #adb5bd 65%, #dee2e6 100%);--gradient-card: linear-gradient( 145deg, rgba(73, 80, 87, .05) 0%, rgba(108, 117, 125, .03) 100% );--gradient-glow: radial-gradient( 600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(73, 80, 87, .03), transparent 40% );--shadow-card: 0 1px 3px rgba(0, 0, 0, .08);--shadow-elevated: 0 4px 16px rgba(0, 0, 0, .12);--shadow-glow: 0 0 20px rgba(73, 80, 87, .1);--gradient-logo: linear-gradient(135deg, #495057, #adb5bd);--reading-bg-primary: #f0f1f3;--reading-bg-surface: #f8f9fa;--reading-bg-code: #e9ecef;--reading-border-subtle: rgba(73, 80, 87, .1);--reading-border-card: rgba(73, 80, 87, .15);--reading-border-active: rgba(73, 80, 87, .36);--reading-accent-glow: rgba(73, 80, 87, .06);--text-on-accent: #ffffff;--text-on-brand: #0d1117;--reading-theme-bg-primary: #f0f1f3;--reading-theme-bg-surface: #f8f9fa;--reading-theme-bg-card: #f8f9fa;--reading-theme-bg-card-hover: #dee2e6;--reading-theme-bg-code: #e9ecef;--reading-theme-accent-primary: #495057;--reading-theme-accent-secondary: #343a40;--reading-theme-accent-tertiary: #5f6670;--reading-theme-border-subtle: rgba(73, 80, 87, .1);--reading-theme-border-card: rgba(73, 80, 87, .15);--reading-theme-border-active: rgba(73, 80, 87, .36);--reading-theme-accent-glow: rgba(73, 80, 87, .06)}@media(prefers-reduced-motion:reduce){:root{--motion-duration-active-fast: var(--motion-duration-instant);--motion-duration-active-standard: var(--motion-duration-instant);--motion-duration-active-slow: var(--motion-duration-instant);--motion-duration-active-skeleton: var(--motion-duration-instant);--motion-duration-active-view-transition: var(--motion-duration-instant);--motion-duration-active-card-entrance: var(--motion-duration-instant)}}html{scroll-behavior:smooth;font-size:var(--app-font-size, 1rem);background:var(--surface-paper)}body{font-family:var(--font-body);font-feature-settings:"ss01" on,"ss02" on,"kern" on,"liga" on;background:var(--surface-paper);color:var(--text-primary);line-height:calc(var(--leading-normal) * var(--density-scale, 1));letter-spacing:0;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}#root{min-height:100vh;display:flex;flex-direction:column}a{color:inherit;text-decoration:underline;text-decoration-color:var(--accent-primary);text-decoration-thickness:1px;text-underline-offset:.2em;transition:text-decoration-color var(--transition-fast),color var(--transition-fast)}a:hover{text-decoration-thickness:2px;color:var(--accent-primary)}[data-palette-type=light] a:hover{color:var(--text-heading)}img{max-width:100%;height:auto}::selection{background:var(--accent-primary);color:var(--text-on-accent)}:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px;border-radius:var(--radius-sm)}.num,.font-mono,[class*=ticker],[class*=dashboard-tile]{font-variant-numeric:tabular-nums}.skip-to-content{position:absolute;top:-100%;left:1rem;z-index:10000;padding:.625rem 1.25rem;background:var(--accent-primary);color:var(--text-on-accent);border-radius:var(--radius-sm);font-family:var(--font-mono);font-weight:600;font-size:.8125rem;letter-spacing:var(--tracking-wide);text-transform:uppercase;transition:top .18s ease}.skip-to-content:focus{top:.75rem;color:var(--text-on-accent)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.page-loader{display:flex;justify-content:center;align-items:center;min-height:40vh}.page-loader-spinner{width:28px;height:28px;border:2px solid var(--border-subtle);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-card);border:2px solid transparent;background-clip:content-box;border-radius:8px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted);background-clip:content-box}.app-layout{display:flex;min-height:100vh;background:var(--surface-paper)}.main-content{flex:1;margin-left:var(--sidebar-width);padding-top:var(--navbar-height);width:100%;min-height:100vh;min-width:0;transition:margin-left var(--transition-base)}.main-content>*{min-width:0}.main-content:focus{outline:2px solid var(--accent-primary);outline-offset:2px}.page-container{width:min(100%,var(--content-max-width));margin:0 auto;padding:clamp(2rem,4vw,3.5rem) var(--page-padding) clamp(3rem,6vw,5rem)}.page-container.lesson-with-toc{width:min(100%,calc(var(--content-max-width) + 260px + 2rem))}.lesson-reading-surface{--bg-primary: var(--reading-theme-bg-primary);--bg-surface: var(--reading-theme-bg-surface);--bg-card: var(--reading-theme-bg-card);--bg-card-hover: var(--reading-theme-bg-card-hover);--bg-code: var(--reading-theme-bg-code);--accent-primary: var(--reading-theme-accent-primary);--accent-secondary: var(--reading-theme-accent-secondary);--accent-tertiary: var(--reading-theme-accent-tertiary);--border-subtle: var(--reading-theme-border-subtle);--border-card: var(--reading-theme-border-card);--border-active: var(--reading-theme-border-active);--accent-glow: var(--reading-theme-accent-glow);--gradient-card: none;--gradient-glow: none;--shadow-card: 0 1px 0 0 var(--border-subtle);--shadow-glow: none}.lesson-reading-surface.page-container{background:var(--bg-primary)}.eyebrow{font-family:var(--font-mono);font-size:.6875rem;font-weight:500;letter-spacing:var(--tracking-wide);text-transform:uppercase;color:var(--text-muted)}.display-headline{font-family:var(--font-display);font-weight:380;font-variation-settings:"opsz" 144,"SOFT" 30,"wght" 380;font-size:clamp(2.5rem,6vw,5.5rem);line-height:var(--leading-tight);letter-spacing:var(--tracking-tight);color:var(--text-heading)}.display-numeral{font-family:var(--font-display);font-weight:280;font-variation-settings:"opsz" 144,"SOFT" 0,"wght" 280;font-size:clamp(7rem,14vw,16rem);line-height:.85;letter-spacing:-.04em;color:var(--text-heading);font-variant-numeric:lining-nums}.kicker{font-family:var(--font-mono);font-size:.75rem;font-weight:500;letter-spacing:var(--tracking-wide);text-transform:uppercase;color:var(--accent-primary);display:inline-flex;align-items:center;gap:.5rem}.kicker:before{content:"";display:inline-block;width:8px;height:8px;background:var(--accent-primary);border-radius:50%;flex-shrink:0}.hairline{border:0;border-top:1px solid var(--border-subtle);margin:0}.hairline-strong{border:0;border-top:1px solid var(--border-card);margin:0}.section-header{display:grid;gap:.5rem;margin:0 0 1.25rem;max-width:70ch}.section-header h1,.section-header h2{font-family:var(--font-display);font-weight:380;font-variation-settings:"opsz" 144,"SOFT" 30,"wght" 380;font-size:clamp(1.875rem,4vw,3rem);line-height:var(--leading-tight);letter-spacing:-.025em;color:var(--text-heading);margin:0}.section-header h2{font-size:clamp(1.5rem,3vw,2.25rem);letter-spacing:-.02em}.section-header p{font-family:var(--font-display);font-weight:380;font-variation-settings:"opsz" 24,"SOFT" 50;font-size:clamp(1rem,1.2vw,1.125rem);line-height:var(--leading-snug);color:var(--text-secondary);margin:0;max-width:60ch}.hero-cta-link,.continue-banner-cta{display:inline-flex;align-items:center;gap:.5rem;padding:.7rem 1.125rem;font-family:var(--font-mono);font-size:.75rem;font-weight:600;letter-spacing:var(--tracking-wide);text-transform:uppercase;text-decoration:none;border-radius:var(--radius-sm);background:var(--accent-primary);color:var(--text-on-accent);border:1px solid var(--accent-primary);transition:background var(--transition-fast);min-height:44px}.hero-cta-link:hover,.continue-banner-cta:hover{background:var(--signal-300);color:var(--text-on-accent);text-decoration:none}[data-palette-type=light] .hero-cta-link,[data-palette-type=light] .continue-banner-cta{background:var(--ink-900);color:var(--bone-50);border-color:var(--ink-900)}[data-palette-type=light] .hero-cta-link:hover,[data-palette-type=light] .continue-banner-cta:hover{background:var(--ink-700);color:var(--bone-50)}.continue-banner{display:grid;gap:.625rem;padding:1.25rem 1.5rem;background:var(--surface-paper);border:1px solid var(--border-card);border-left:3px solid var(--accent-primary);border-radius:0;margin:1rem 0}.continue-banner-title{font-family:var(--font-mono);font-size:.625rem;font-weight:600;letter-spacing:var(--tracking-wide);text-transform:uppercase;color:var(--accent-primary);margin:0}.continue-banner-subtitle{font-family:var(--font-display);font-weight:460;font-variation-settings:"opsz" 24,"SOFT" 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