*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{margin:0;padding:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#0a0a0a;color:#fff;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;touch-action:manipulation}#root{min-height:100vh}button{border:1px solid rgba(255,255,255,.2);border-radius:12px;background:#ffffff1a;color:#fff;font-family:inherit;font-size:14px;cursor:pointer;transition:all .2s;touch-action:manipulation;-webkit-user-select:none;user-select:none}button:active:not(:disabled){transform:scale(.95);background:#ffffff26}button:disabled{cursor:not-allowed;opacity:.5}h1,h2,h3,h4{font-weight:600}@keyframes floatUp{0%{opacity:1;transform:translate(-50%,-50%) translateY(0)}to{opacity:0;transform:translate(-50%,-50%) translateY(-60px)}}.treadmill-control{padding:40px;background:#1a1a1a;border-radius:16px;text-align:center;border:2px solid #ffa500;max-width:400px;width:90%}.speed-display{font-size:64px;font-weight:700;margin-bottom:30px;color:orange}.controls{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.controls button{padding:16px 24px;font-size:18px;cursor:pointer;border:none;border-radius:8px;background:orange;color:#fff;font-weight:700;transition:all .2s}.controls button:hover{background:#ff8c00;transform:translateY(-2px)}.controls button:active{transform:scale(.95)}