:root{--primary:#3a86ff;--primary-dark:#2667cc;--secondary:#8338ec;--dark:#0f172a;--light:#f8fafc;--gray:#94a3b8;--success:#10b981;--header-footer-height:80px;--section-padding:3rem;--border-radius:12px;--box-shadow:0 10px 15px -3px rgba(0, 0, 0, 0.1),0 4px 6px -2px rgba(0, 0, 0, 0.05);--font-main:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;--font-heading:'Poppins',var(--font-main)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-main);line-height:1.6;color:var(--dark);background:linear-gradient(135deg,#f5f7fa 0,#e4e8f0 100%);min-height:100vh;display:flex;flex-direction:column}h1,h2,h3{font-family:var(--font-heading);font-weight:700;line-height:1.2}header{height:var(--header-footer-height);background-color:var(--dark);color:var(--light);display:flex;align-items:center;justify-content:space-between;padding:0 2rem;position:fixed;width:100%;top:0;z-index:1000;box-shadow:var(--box-shadow)}.logo{display:flex;align-items:center;gap:.75rem}.logo img{height:36px;width:auto}.logo-text{font-weight:700;font-size:1.25rem}main{flex:1;display:flex;justify-content:center;align-items:center;padding:calc(var(--header-footer-height) + var(--section-padding)) 2rem}.hero{display:flex;flex-direction:column;align-items:center;text-align:center;max-width:800px;width:100%}.content-card{background-color:#fff;border-radius:var(--border-radius);padding:2.5rem;width:100%;box-shadow:var(--box-shadow);text-align:center;transition:transform .3s ease,box-shadow .3s ease}.content-card:hover{transform:translateY(-5px);box-shadow:0 20px 25px -5px rgba(0,0,0,.1),0 10px 10px -5px rgba(0,0,0,.04)}.content h1{font-size:2.5rem;margin-bottom:1.5rem;color:var(--dark);background:linear-gradient(to right,var(--primary),var(--secondary));-webkit-background-clip:text;background-clip:text;color:transparent}.content p{font-size:1.125rem;margin-bottom:2rem;color:#475569}.features{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center;margin:2rem 0}.feature-item{background:rgba(58,134,255,.1);border-radius:8px;padding:.75rem 1.25rem;font-size:.9rem;color:var(--primary);font-weight:500}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.875rem 2rem;border-radius:var(--border-radius);font-weight:600;text-decoration:none;transition:all .3s ease;cursor:pointer}.btn-download{background-color:var(--primary);color:#fff;box-shadow:0 4px 6px -1px rgba(58,134,255,.4)}.btn-download:hover{background-color:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 15px -3px rgba(58,134,255,.4)}.donate{margin-top:2rem;padding-top:1.5rem;border-top:1px solid #e2e8f0}.donate p{font-size:.95rem;margin-bottom:.5rem}.donate strong{color:var(--dark)}.payment-methods{display:flex;gap:1rem;justify-content:center;margin-top:1rem}.payment-method{font-size:.85rem;background:#f1f5f9;padding:.5rem 1rem;border-radius:6px}.app-preview{width:100%}footer{height:var(--header-footer-height);background-color:var(--dark);color:var(--light);display:flex;align-items:center;justify-content:center;width:100%;padding:0 2rem}.footer-content{width:100%;max-width:1200px;display:flex;justify-content:space-between;align-items:center}.copyright{font-size:.9rem}.social-links{display:flex;gap:1rem}.social-link{color:var(--light);opacity:.7;transition:opacity .3s}.social-link:hover{opacity:1}@media (max-width:768px){:root{--header-footer-height:70px;--section-padding:2rem}footer,header{padding:0 1.5rem}.content h1{font-size:2rem}.content p{font-size:1rem}.features{flex-direction:column;align-items:center}}@media (max-width:480px){.content-card{padding:1.5rem}.content h1{font-size:1.75rem}.payment-methods{flex-direction:column;align-items:center;gap:.5rem}}