body{font-family:sans-serif;background-color:#edf4ff}h1{text-align:center;font-size:3rem;font-weight:700;margin-top:1rem}input{margin-left:2rem}.viewer-container{position:relative;display:inline-block;margin-top:20px}canvas{display:block;margin:0}.crop-line{position:absolute;left:0;width:100%;height:3px;background:red;cursor:row-resize;z-index:10}.crop-line:after{content:"";display:block;width:100%;height:15px;transform:translateY(-6px)}