body{overflow:hidden}#canvas-container{position:fixed;top:0;left:0;width:100vw;height:100vh;z-index:1}#welcome-screen{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);z-index:100;text-align:center;width:90%;max-width:800px;padding:40px;transition:opacity .5s ease;display:none}#welcome-screen.hidden{display:none!important;opacity:0!important;pointer-events:none!important}.welcome-title{font-size:4.5rem;margin-bottom:10px;text-shadow:0 0 20px rgba(160,32,240,.5)}.welcome-subtitle{margin-bottom:30px;color:#fff;font-size:1.5rem;font-weight:500;text-shadow:0 2px 4px rgba(0,0,0,.8)}#bottom-nav{position:fixed;bottom:30px;left:20px;right:20px;z-index:10;display:flex;justify-content:space-around;align-items:center;padding:20px 40px;background:#ffffff14;-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-top:1px solid rgba(160,32,240,.5);border-radius:24px;box-shadow:0 -10px 40px #a020f026,0 15px 35px #00000080}.nav-item{display:flex;flex-direction:column;align-items:center;text-decoration:none;color:var(--text-primary);transition:transform .3s;animation:float 6s ease-in-out infinite}.nav-item:nth-child(2n){animation-delay:2s}.nav-item:nth-child(3n){animation-delay:4s}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-12px)}to{transform:translateY(0)}}.planet-icon{width:65px;height:65px;border-radius:50%;margin-bottom:10px;transition:all .3s ease;box-shadow:0 4px 15px #0000004d}.sun-icon{background:#fc0;box-shadow:0 0 10px #fc0}.mercury-icon{background:#aaa}.venus-icon{background:#e3bb76}.earth-icon{background:#2b82c9}.nav-item:hover .planet-icon{transform:scale(1.3);box-shadow:0 0 20px var(--accent-color);border:2px solid var(--text-primary)}.nav-item:hover{animation-play-state:paused}@media(max-width:768px){#bottom-nav{display:flex;overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch;gap:10px;padding:10px;width:100%;box-sizing:border-box;justify-content:flex-start}#bottom-nav::-webkit-scrollbar{display:none}.nav-item{flex-shrink:0}.planet-icon{flex-shrink:0;width:45px;height:45px}.nav-item span{font-size:12px}}