:root{color-scheme:light;--bg:#fbfaf7;--bg-subtle:#f3f1ec;--surface:#ffffff;--surface-2:#f3f1ec;--border:#e4e0d8;--border-strong:#cfc9bd;--text:#1a1d1a;--text-secondary:#5b6159;--text-muted:#8a8f86;--accent:#1f6f4a;--accent-hover:#175639;--accent-bright:#1f6f4a;--accent-contrast:#ffffff;--accent-tint:rgba(31,111,74,0.08);--accent-tint-2:rgba(31,111,74,0.14);--highlight:#c2410c;--highlight-tint:rgba(194,65,12,0.1);--info:#1d4ed8;--info-tint:rgba(29,78,216,0.08);--danger:#b91c1c;--warning:#b45309;--success:#1f6f4a;--tier-beginner:#1f6f4a;--tier-beginner-tint:rgba(31,111,74,0.1);--tier-intermediate:#1d4ed8;--tier-intermediate-tint:rgba(29,78,216,0.1);--tier-advanced:#c2410c;--tier-advanced-tint:rgba(194,65,12,0.1);--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-display:"Fraunces",Georgia,"Times New Roman",serif;--radius:12px;--radius-sm:8px;--shadow:0 1px 2px rgba(26,29,26,0.04),0 4px 16px rgba(26,29,26,0.06);--shadow-hover:0 2px 4px rgba(26,29,26,0.06),0 12px 32px rgba(26,29,26,0.1);--transition:0.2s ease;--measure:68ch;--header-bg:rgba(251,250,247,0.88)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--bg:#0f1214;--bg-subtle:#171b1e;--surface:#171b1e;--surface-2:#1f2427;--border:#2a3034;--border-strong:#3b4247;--text:#e8eae9;--text-secondary:#a3aba6;--text-muted:#7b837e;--accent:#34d399;--accent-hover:#6ee7b7;--accent-bright:#6ee7b7;--accent-contrast:#05231a;--accent-tint:rgba(52,211,153,0.12);--accent-tint-2:rgba(52,211,153,0.2);--highlight:#fb923c;--highlight-tint:rgba(251,146,60,0.14);--info:#60a5fa;--info-tint:rgba(96,165,250,0.12);--danger:#f87171;--warning:#fbbf24;--success:#34d399;--tier-beginner:#34d399;--tier-beginner-tint:rgba(52,211,153,0.14);--tier-intermediate:#60a5fa;--tier-intermediate-tint:rgba(96,165,250,0.14);--tier-advanced:#fb923c;--tier-advanced-tint:rgba(251,146,60,0.14);--shadow:0 1px 2px rgba(0,0,0,0.4),0 4px 16px rgba(0,0,0,0.3);--shadow-hover:0 2px 4px rgba(0,0,0,0.5),0 12px 32px rgba(0,0,0,0.45);--header-bg:rgba(15,18,20,0.88)}}:root[data-theme=dark]{color-scheme:dark;--bg:#0f1214;--bg-subtle:#171b1e;--surface:#171b1e;--surface-2:#1f2427;--border:#2a3034;--border-strong:#3b4247;--text:#e8eae9;--text-secondary:#a3aba6;--text-muted:#7b837e;--accent:#34d399;--accent-hover:#6ee7b7;--accent-bright:#6ee7b7;--accent-contrast:#05231a;--accent-tint:rgba(52,211,153,0.12);--accent-tint-2:rgba(52,211,153,0.2);--highlight:#fb923c;--highlight-tint:rgba(251,146,60,0.14);--info:#60a5fa;--info-tint:rgba(96,165,250,0.12);--danger:#f87171;--warning:#fbbf24;--success:#34d399;--tier-beginner:#34d399;--tier-beginner-tint:rgba(52,211,153,0.14);--tier-intermediate:#60a5fa;--tier-intermediate-tint:rgba(96,165,250,0.14);--tier-advanced:#fb923c;--tier-advanced-tint:rgba(251,146,60,0.14);--shadow:0 1px 2px rgba(0,0,0,0.4),0 4px 16px rgba(0,0,0,0.3);--shadow-hover:0 2px 4px rgba(0,0,0,0.5),0 12px 32px 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0;font-size:.88rem;color:var(--text-secondary);display:flex;align-items:center;gap:.5rem}.tier-features li:before{content:"✓";color:var(--accent);font-weight:700}.tier-btn{display:inline-flex;align-items:center;justify-content:center;align-self:center;width:auto;min-width:220px;max-width:100%;padding:.75rem 1.75rem;background:linear-gradient(135deg,var(--accent),var(--accent-hover));font-weight:600;font-size:.95rem;border-radius:9999px;transition:all var(--transition);margin-top:auto;white-space:nowrap}.tier-btn,.tier-btn:hover{color:var(--accent-contrast)}.tier-btn:hover{opacity:.9;transform:translateY(-2px)}.not-found{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;text-align:center;padding:2rem}.not-found h1{font-size:6rem;font-weight:900;color:var(--text)}.not-found h2{font-size:1.5rem;margin-bottom:1rem}.not-found p{color:var(--text-secondary);margin-bottom:2rem}.not-found a{padding:.75rem 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