:root{--primary-color:#7c3aed;--primary-hover:#6d28d9;--primary-light:#7c3aed14;--secondary-color:#64748b;--accent-color:#ec4899;--accent-hover:#db2777;--success-color:#10b981;--warning-color:#f59e0b;--error-color:#ef4444;--background-color:#faf8ff;--surface-color:#fff;--surface-card:#fff;--surface-subtle:#f1f5f9;--surface-hover:#e2e8f0;--border-color:#e2e8f0;--border-focus:#7c3aed;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 12px -2px #7c3aed14, 0 2px 6px -1px #0000000a;--shadow-lg:0 12px 30px -4px #7c3aed1f, 0 4px 12px -2px #0000000d;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px;--font-sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--nav-height:64px}[data-theme=dark]{--primary-color:#8b5cf6;--primary-hover:#7c3aed;--primary-light:#8b5cf626;--secondary-color:#94a3b8;--accent-color:#f472b6;--accent-hover:#ec4899;--success-color:#10b981;--warning-color:#f59e0b;--error-color:#f87171;--background-color:#0b0f19;--surface-color:#151d30;--surface-card:#151d30;--surface-subtle:#1e293b;--surface-hover:#26334d;--border-color:#26334d;--border-focus:#8b5cf6;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--shadow-sm:0 1px 3px 0 #0000004d;--shadow-md:0 4px 16px -2px #00000080;--shadow-lg:0 14px 34px -4px #0009}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;font-size:16px}body{font-family:var(--font-sans);background-color:var(--background-color);color:var(--text-primary);flex-direction:column;min-height:100dvh;line-height:1.6;transition:background-color .25s,color .25s;display:flex}:focus-visible{outline:2px solid var(--primary-color);outline-offset:2px}button,input,select,textarea,a{touch-action:manipulation;-webkit-tap-highlight-color:transparent}.app-nav{z-index:100;height:var(--nav-height);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border-color);background:#ffffffd1;transition:background-color .25s,border-color .25s;position:sticky;top:0}[data-theme=dark] .app-nav{background:#151d30d9}.nav-container{justify-content:space-between;align-items:center;gap:12px;max-width:1080px;height:100%;margin:0 auto;padding:0 16px;display:flex}.nav-brand{-webkit-user-select:none;user-select:none;align-items:center;gap:10px;text-decoration:none;display:flex}.brand-logo{background:linear-gradient(135deg, var(--primary-color), var(--accent-color));color:#fff;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;display:flex;box-shadow:0 4px 10px -2px #7c3aed59}.brand-text{align-items:baseline;gap:6px;display:flex}.brand-title{letter-spacing:-.02em;color:var(--text-primary);font-size:1.15rem;font-weight:800}.brand-badge{color:var(--primary-color);background:var(--primary-light);letter-spacing:.02em;text-transform:uppercase;border-radius:6px;padding:2px 6px;font-size:.6875rem;font-weight:600}.nav-actions{align-items:center;gap:8px;display:flex}.nav-btn{background:var(--surface-subtle);border:1px solid var(--border-color);border-radius:var(--radius-sm);min-width:38px;height:38px;color:var(--text-secondary);cursor:pointer;justify-content:center;align-items:center;gap:6px;padding:0 10px;font-size:.85rem;font-weight:500;text-decoration:none;transition:all 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var(--border-color);border-radius:var(--radius-md);width:148px;box-shadow:var(--shadow-lg);z-index:1000;padding:6px;animation:.18s ease-out dropdownIn;display:none;position:absolute;top:calc(100% + 8px);right:0}.language-dropdown.show{display:block}.language-option{border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;align-items:center;gap:8px;padding:8px 10px;font-size:.85rem;transition:all .15s;display:flex}.language-option:hover{background:var(--surface-subtle);color:var(--text-primary)}.theme-toggle .theme-icon--moon,[data-theme=dark] .theme-toggle .theme-icon--sun{display:none}[data-theme=dark] .theme-toggle .theme-icon--moon{display:inline-block}.container{flex:1;width:100%;max-width:900px;margin:0 auto;padding:24px 16px 40px}.hero-section{text-align:center;margin-bottom:24px}.hero-section 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