Corner sweep
Corner sweep: a CSS button. Copy the rules, or the prompt that rebuilds it.
CSS
.btn-063 {
position: relative;
overflow: hidden;
font: 600 14px/1 system-ui,sans-serif;
color: #be185d;
background: #fff;
border: 2px solid #be185d;
border-radius: 10px;
padding: 12px 26px;
cursor: pointer;
z-index: 0;
transition: color .35s
}
.btn-063::before {
content: "";
position: absolute;
top: -10px;
left: -10px;
width: 20px;
height: 20px;
border-radius: 50%;
background: #be185d;
transform: scale(0);
transition: transform .35s ease;
z-index: -1
}
.btn-063:hover {
color: #fff
}
.btn-063:hover::before {
transform: scale(20)
}
.btn-063:focus-visible {
outline: 2px solid #be185d;
outline-offset: 3px
}
.btn-063:active::before {
background: #9d174d
}
HTML
<button class="btn-063">Sweep</button>Prompt
A pink outline button (2px #be185d border, pink text, 10px radius, 12px by 26px padding, white fill). On hover a small circle anchored at the top-left corner scales up 20x (350ms) to flood the button pink while the text turns white. Active #9d174d. Focus outline 2px pink.