:root{--bg-primary: #f0f2f5;--bg-secondary: #ffffff;--bg-header: rgba(255, 255, 255, .92);--text-primary: #1a1a2e;--text-secondary: #4a4a6a;--text-muted: #8888a0;--accent: #0077b6;--accent-hover: #005f99;--border: rgba(0, 0, 0, .1);--shadow: rgba(0, 0, 0, .1);--shadow-lg: rgba(0, 0, 0, .18);--btn-bg: rgba(0, 0, 0, .04);--btn-hover-bg: rgba(0, 0, 0, .08);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--transition-fast: .18s ease;--transition-normal: .3s ease;--font: "Inter", "Raleway", system-ui, sans-serif}html,body{margin:0;padding:0;font-family:var(--font);background:var(--bg-primary);color:var(--text-primary);height:100%;overflow:hidden}*{box-sizing:border-box}body{display:flex;flex-direction:column}header{background:var(--bg-header);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);padding:.5rem 1.25rem .6rem;z-index:10;flex-shrink:0}.header-top{display:flex;align-items:center;gap:10px;margin-bottom:.45rem}.logo-text{font-size:.7rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);border:1.5px solid var(--accent);border-radius:var(--radius-sm);padding:2px 7px;flex-shrink:0}.header-title{font-size:1.05rem;font-weight:500;margin:0;color:var(--text-primary);letter-spacing:.01em}.header-bottom{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.floor-selector{display:flex;gap:6px;align-items:center}.floor-btn{display:inline-flex;align-items:center;gap:5px;font-family:var(--font);font-size:.78rem;font-weight:500;color:var(--text-secondary);background:var(--btn-bg);border:1px solid var(--border);border-radius:100px;padding:5px 15px 5px 10px;cursor:pointer;white-space:nowrap;-webkit-user-select:none;user-select:none;transition:background var(--transition-fast),color var(--transition-fast),border-color var(--transition-fast),box-shadow var(--transition-fast)}.floor-btn-icon{font-size:.9rem;line-height:1;opacity:.7}.floor-btn:hover:not(.active):not(:disabled){background:var(--btn-hover-bg);color:var(--text-primary)}.floor-btn.active{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 2px 10px #0077b64d}.floor-btn.active .floor-btn-icon{opacity:1}.floor-btn:disabled{cursor:wait;opacity:.6}.header-hints{display:flex;gap:6px;flex-wrap:wrap;margin-left:auto}.hint-pill{display:inline-flex;align-items:center;font-size:.68rem;color:var(--text-secondary);background:var(--btn-bg);border:1px solid var(--border);border-radius:100px;padding:2px 10px;white-space:nowrap;-webkit-user-select:none;user-select:none}.wrap{flex:1;position:relative;overflow:hidden}#app{position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden}#app canvas{transition:opacity .2s ease}#app.loading canvas{opacity:.35}.spinner{width:40px;height:40px;position:absolute;left:50%;top:50%;margin:-20px 0 0 -20px;background-color:var(--accent);border-radius:50%;animation:sk-scaleout 1s infinite ease-in-out;pointer-events:none;z-index:50;display:none}@keyframes sk-scaleout{0%{transform:scale(0);opacity:1}to{transform:scale(1);opacity:0}}.site-footer{text-align:center;padding:6px 0;font-size:.65rem;letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted);background:var(--bg-header);border-top:1px solid var(--border);-webkit-user-select:none;user-select:none;flex-shrink:0}.site-footer strong{color:var(--accent);font-weight:600}.footer-sep{margin:0 6px;opacity:.35}.footer-link{color:var(--accent);text-decoration:none;transition:color var(--transition-fast)}.footer-link:hover{color:var(--accent-hover);text-decoration:underline}@media (max-width: 640px){.header-title{font-size:.92rem}.floor-btn{font-size:.72rem;padding:4px 12px 4px 9px}.hint-pill{font-size:.62rem}.header-hints{display:none}}