:root{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:#f0f8ff;color:#2c3e50}.bubble-app{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:2rem}h1{margin:0 0 .5rem;font-size:1.75rem;font-weight:700;color:#2c3e50}.info{font-size:1.2rem;margin:.25rem 0;color:#34495e}.ball-row{display:flex;gap:10px;margin:1.5rem 0}.ball{width:50px;height:50px;border-radius:50%;cursor:pointer;border:3px solid #333;transition:transform .15s,box-shadow .15s}.ball:hover{transform:scale(1.1)}.ball.selected{border-color:gold;box-shadow:0 0 10px gold}.message{font-size:1.3rem;font-weight:600;margin:.75rem 0;color:#2c3e50}button{padding:10px 20px;font-size:1rem;font-weight:600;background:#3498db;color:#fff;border:none;border-radius:5px;cursor:pointer;margin-top:.5rem;transition:background .2s}button:hover{background:#2980b9}