html,body{margin:0;padding:0;width:100%;height:100%;overflow:hidden;background:#e8e6e1;touch-action:none;-webkit-user-select:none;user-select:none}canvas{display:block;width:100%;height:100%}#gate{position:fixed;top:0;left:0;width:100%;height:100%;background:#fff;z-index:100;display:flex;align-items:center;justify-content:center;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:#202124;padding:20px;box-sizing:border-box}#gate.hidden{display:none}#gate .gate-content{display:flex;flex-direction:column;align-items:center;text-align:center;max-width:340px;width:100%}#gate img{width:100px;height:100px;border-radius:22px;margin-bottom:14px;box-shadow:0 4px 20px #00000014}#gate h1{font-size:22px;margin:0 0 4px;font-weight:700;letter-spacing:.3px}#gate .subtitle{color:#5f6368;font-size:13px;margin:0 0 24px}#gate .install-box{background:#f8f9fa;border:1px solid #e0e0e0;border-radius:16px;padding:20px;width:100%;margin-bottom:16px}#gate .install-btn{background:#1a73e8;color:#fff;border:none;padding:16px 32px;border-radius:12px;font-size:16px;font-weight:700;cursor:pointer;width:100%;touch-action:manipulation;font-family:Inter,sans-serif;display:flex;align-items:center;justify-content:center;gap:8px}#gate .install-btn:active{transform:scale(.97);opacity:.9}#gate .install-icon{font-size:18px}#gate .install-note{color:#80868b;font-size:11px;margin:10px 0 0;line-height:1.4}#gate .install-steps{text-align:left}#gate .step{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid #e8e8e8}#gate .step:last-child{border-bottom:none}#gate .step-num{flex-shrink:0;width:24px;height:24px;background:#1a73e8;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}#gate .step-icon{font-size:18px;flex-shrink:0;width:24px;text-align:center}#gate .step-text{font-size:13px;color:#202124;line-height:1.4}#gate .step-text b{color:#1a73e8;font-weight:600}#gate .no-support{color:#5f6368;font-size:13px;line-height:1.6;margin:0}#gate .no-support b{color:#1a73e8}#gate .skip-btn{background:none;border:none;color:#5f6368;font-size:14px;cursor:pointer;padding:12px 20px;margin-top:4px;touch-action:manipulation;font-family:Inter,sans-serif}#gate .skip-btn:active{color:#1a73e8}