*{margin:0;padding:0;box-sizing:border-box}body{overflow:hidden;background:#000}#canvas{display:block;width:100vw;height:100vh}#topbar{position:fixed;top:0;left:0;right:0;z-index:200;display:flex;justify-content:space-between;align-items:baseline;padding:14px 28px;background:#f4f4f4;border-bottom:1px solid #0a0a0a;font-family:-apple-system,BlinkMacSystemFont,Inter,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:#0a0a0a}#topbar a{color:#0a0a0a;text-decoration:none;transition:color .15s}#topbar a:hover{color:#cc2a1a}#topbar .topbar-right a{margin-left:24px}#topbar .topbar-right a.current{color:#8a8680;pointer-events:none}#controls{position:fixed;top:64px;left:50%;transform:translate(-50%);display:flex;gap:6px;z-index:100;flex-wrap:wrap;justify-content:center;max-width:90vw}#controls .group{display:flex;align-items:center;gap:4px;padding:4px 8px;background:#0000004d;border-radius:20px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}#controls .group-label{color:#fff6;font-family:system-ui,sans-serif;font-size:10px;text-transform:uppercase;letter-spacing:.05em;padding:0 4px;white-space:nowrap}#controls button{padding:5px 10px;border:1px solid rgba(255,255,255,.2);border-radius:14px;background:#00000080;color:#ffffffb3;font-family:system-ui,sans-serif;font-size:12px;cursor:pointer;transition:all .2s;white-space:nowrap}#controls button:hover{background:#ffffff26;border-color:#fff6}#controls button.active{background:#6478b44d;border-color:#96aadc99;color:#fff}#exercise-info{position:fixed;bottom:20px;left:50%;transform:translate(-50%);display:flex;align-items:center;gap:16px;padding:10px 20px;background:#00000080;border:1px solid rgba(255,255,255,.15);border-radius:12px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:100}#exercise-name{color:#fffc;font-family:system-ui,sans-serif;font-size:13px;white-space:nowrap}#exercise-nav{display:flex;gap:8px}#exercise-nav button{width:32px;height:32px;border:1px solid rgba(255,255,255,.2);border-radius:50%;background:#00000080;color:#ffffffb3;font-size:14px;cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center}#exercise-nav button:hover{background:#ffffff26;border-color:#fff6;color:#fff}