:root{font-family:Segoe UI,system-ui,-apple-system,BlinkMacSystemFont,Helvetica Neue,sans-serif;color:#000;background-color:#fff}body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center}#app{width:100%;display:flex;align-items:center;justify-content:center}canvas{border:2px solid #000000;box-shadow:0 10px 30px #00000059}.share-button{position:fixed;top:16px;right:16px;padding:10px 14px;background-color:#1d9bf0;color:#fff;border-radius:10px;text-decoration:none;font-weight:700;box-shadow:0 8px 16px #1d9bf033;transition:transform .15s ease,box-shadow .15s ease,background-color .15s ease}.share-button:hover{background-color:#1a8cd8;transform:translateY(-2px);box-shadow:0 12px 24px #1d9bf040}