*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,-apple-system,sans-serif;background:#0f0f0f;color:#f0f0f0;min-height:100vh;display:flex;align-items:center;justify-content:center}button{cursor:pointer;border:none;border-radius:8px;font-size:1rem;font-weight:600;padding:12px 28px;transition:background .15s,transform .1s}button:active{transform:scale(.97)}button:disabled{opacity:.45;cursor:not-allowed}