:root{--bg-color:#0a0a0a;--text-primary:#f5f5f7;--text-secondary:#a1a1a6;--accent-color:#0071e3;--accent-hover:#0077ed;--glass-bg:#ffffff0d;--glass-border:#ffffff1a;--hero-gradient:linear-gradient(135deg, #0071e3 0%, #4facfe 100%)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}a{color:var(--accent-color);text-decoration:none;transition:color .2s}a:hover{color:var(--accent-hover)}.app-container{flex-direction:column;min-height:100vh;display:flex}.header{-webkit-backdrop-filter:blur(10px);z-index:100;border-bottom:1px solid var(--glass-border);background:#0a0a0acc;justify-content:space-between;align-items:center;padding:1.5rem 2rem;display:flex;position:sticky;top:0}.logo{background:var(--hero-gradient);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:1.5rem;font-weight:700}.lang-switch button{border:1px solid var(--glass-border);color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:20px;padding:.5rem 1rem;font-family:Inter,sans-serif;transition:all .2s}.lang-switch button:hover{background:var(--glass-bg);color:var(--text-primary)}.hero{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:6rem 2rem;display:flex}.hero h1{letter-spacing:-.05em;margin-bottom:1rem;font-size:4rem;font-weight:700}.hero p{color:var(--text-secondary);max-width:600px;margin-bottom:3rem;font-size:1.25rem}.download-section{flex-wrap:wrap;justify-content:center;gap:2rem;width:100%;max-width:1000px;display:flex}.download-card{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:16px;flex-direction:column;flex:1;align-items:center;min-width:280px;padding:2rem;transition:transform .3s;display:flex}.download-card:hover{background:#ffffff14;transform:translateY(-5px)}.download-card.disabled{opacity:.6}.download-card.disabled:hover{background:var(--glass-bg);transform:none}.download-card h3{color:var(--text-primary);margin-bottom:.5rem;font-size:1.5rem}.download-card .req{color:var(--text-secondary);text-align:center;margin-bottom:1.5rem;font-size:.9rem}.download-buttons{flex-direction:column;gap:1rem;width:100%;display:flex}.download-buttons .btn{justify-content:center;width:100%}.btn{cursor:pointer;color:#fff;border:none;border-radius:30px;align-items:center;gap:.75rem;padding:.875rem 2rem;font-size:1.1rem;font-weight:500;transition:transform .2s,box-shadow .2s;display:inline-flex}.btn.primary{background:var(--hero-gradient);box-shadow:0 4px 14px #0071e366}.btn.primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #0071e399}.btn.secondary{background:var(--glass-bg);border:1px solid var(--glass-border);color:var(--text-primary)}.btn.secondary:hover{background:#ffffff1a;transform:translateY(-2px)}.showcase{border:1px solid var(--glass-border);aspect-ratio:16/9;background:#111;border-radius:12px;justify-content:center;align-items:center;width:100%;max-width:1000px;margin-top:4rem;display:flex;position:relative;overflow:hidden;box-shadow:0 20px 40px #00000080}.showcase-img{object-fit:contain;opacity:0;z-index:1;width:100%;height:100%;transition:opacity 1.2s cubic-bezier(.4,0,.2,1);position:absolute;top:0;left:0}.showcase-img.active{opacity:1;z-index:2}.placeholder-content{z-index:0;color:var(--text-secondary);text-align:center;flex-direction:column;gap:.5rem;font-size:1.2rem;display:flex;position:absolute}.showcase.fallback-mode .placeholder-content{z-index:3}.features{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;max-width:1200px;margin:0 auto;padding:6rem 2rem;display:grid}.feature-card{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:16px;padding:2.5rem 2rem;transition:transform .3s,background .3s}.feature-card:hover{background:#ffffff14;transform:translateY(-5px)}.feature-card h3{color:var(--text-primary);margin-bottom:1rem;font-size:1.5rem}.feature-card p{color:var(--text-secondary)}.footer{text-align:center;color:var(--text-secondary);border-top:1px solid var(--glass-border);padding:2rem;font-size:.9rem}@media (width<=768px){.hero h1{font-size:2.5rem}.header{padding:1rem}.features{padding:4rem 1rem}}