:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color:#f8fbff;background-color:#02040a}*{box-sizing:border-box}body,html{margin:0;padding:0;width:100%;height:100%;background:radial-gradient(circle at top,#07122a,#03050b 60%)}#app{width:100%;height:100%}canvas{width:100%!important;height:100%!important;display:block}.transition-btn{position:fixed;top:20px;left:20px;padding:10px 18px;border:none;border-radius:8px;background:#20a4f3e6;color:#031018;font-size:.95rem;font-weight:600;cursor:pointer;box-shadow:0 6px 20px #00000040;transition:transform .12s ease,opacity .12s ease}.transition-btn:disabled{opacity:.55;cursor:default}.transition-btn:not(:disabled):hover{transform:translateY(-2px)}