*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:#333;background-color:#fff}.container{max-width:1200px;margin:0 auto;padding:0 20px}header{background:#fff;border-bottom:1px solid #e5e5e5;position:-webkit-sticky;position:sticky;top:0;z-index:100}.nav-container{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center;height:60px}.logo{font-size:24px;font-weight:700;color:#000;text-decoration:none}.nav-menu{display:flex;list-style:none;gap:30px}.nav-menu a{color:#666;text-decoration:none;font-weight:500;transition:color .3s ease}.nav-menu a:hover{color:#000}.hero{padding:80px 0;text-align:center;background:linear-gradient(135deg,#f8f9fa,#fff)}.hero h1{font-size:4rem;font-weight:700;margin-bottom:30px;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-description{font-size:1.25rem;color:#666;max-width:800px;margin:0 auto 60px;line-height:1.8}.download-section{margin-top:60px}.download-section h2{font-size:2rem;margin-bottom:30px;color:#333}.download-buttons{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}.download-btn{display:inline-flex;align-items:center;gap:10px;padding:15px 30px;border-radius:12px;text-decoration:none;font-weight:600;font-size:1.1rem;transition:all .3s ease;min-width:150px;justify-content:center}.ios-btn{background:#000;color:#fff}.ios-btn:hover{background:#333;transform:translateY(-2px)}.android-btn{background:#34a853;color:#fff}.android-btn:hover{background:#2d8f47;transform:translateY(-2px)}.btn-icon{font-size:1.2rem}.features{padding:80px 0;background:#fff}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));grid-gap:40px;gap:40px;margin-top:40px}.feature-card{text-align:center;padding:40px 20px;border-radius:16px;background:#f8f9fa;transition:transform .3s ease}.feature-card:hover{transform:translateY(-5px)}.feature-card h3{font-size:1.5rem;margin-bottom:15px;color:#333}.feature-card p{color:#666;line-height:1.6}footer{background:#f8f9fa;padding:40px 0;text-align:center;border-top:1px solid #e5e5e5}footer p{color:#666;font-size:.9rem}.page-header{padding:60px 0 40px;text-align:center;background:#f8f9fa}.page-header h1{font-size:3rem;margin-bottom:20px;color:#333}.page-header p{font-size:1.2rem;color:#666;max-width:600px;margin:0 auto}.content-section{padding:60px 0}.content-section h2{font-size:2.5rem;margin-bottom:30px;color:#333}.content-section h3{font-size:1.8rem;margin-bottom:20px;color:#333}.content-section p{font-size:1.1rem;line-height:1.8;color:#666;margin-bottom:20px}.content-section ul{margin:20px 0;padding-left:30px}.content-section li{font-size:1.1rem;line-height:1.8;color:#666;margin-bottom:10px}.app-store-btn{display:inline-block;margin:20px 10px;transition:transform .3s ease}.app-store-btn:hover{transform:scale(1.05)}.app-store-btn img{height:60px;border-radius:8px}.invite-code-section{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:60px 0;text-align:center}.invite-code-section h2{color:#fff;margin-bottom:30px}.invite-code-section p{color:hsla(0,0%,100%,.9);font-size:1.2rem;margin-bottom:30px}.code-display{background:hsla(0,0%,100%,.1);border:2px solid hsla(0,0%,100%,.3);border-radius:12px;padding:20px;margin:30px auto;max-width:400px;font-family:Courier New,monospace;font-size:1.5rem;font-weight:700;letter-spacing:2px}@media (max-width:768px){.nav-menu{display:none}.hero h1{font-size:2.5rem}.hero-description{font-size:1.1rem}.download-buttons{flex-direction:column;align-items:center}.download-btn{width:100%;max-width:250px}.feature-grid{grid-template-columns:1fr;gap:30px}.content-section h2,.page-header h1{font-size:2rem}}@media (max-width:480px){.container{padding:0 15px}.hero{padding:60px 0}.hero h1{font-size:2rem}.download-section h2{font-size:1.5rem}}