Ember slide fill
Ember slide fill: a CSS button. Copy the rules, or the prompt that rebuilds it.
CSS
.btn-057 {
position: relative;
overflow: hidden;
font: 600 14px/1 system-ui,sans-serif;
color: #c2410c;
background: transparent;
border: 2px solid #c2410c;
border-radius: 8px;
padding: 12px 24px;
cursor: pointer;
z-index: 0;
transition: color .25s
}
.btn-057::before {
content: "";
position: absolute;
inset: 0;
background: #c2410c;
transform: translateX(-101%);
transition: transform .25s ease;
z-index: -1
}
.btn-057:hover {
color: #fff
}
.btn-057:hover::before {
transform: translateX(0)
}
.btn-057:focus-visible {
outline: 2px solid #c2410c;
outline-offset: 3px
}
.btn-057:active::before {
background: #9a3412
}
HTML
<button class="btn-057">Ignite</button>Prompt
An outline button with a 2px burnt-orange #c2410c border and matching text, 8px radius, 12px by 24px padding. On hover a solid #c2410c panel slides in from the left edge (translateX from -101% to 0 in 250ms) filling the button while the text turns white. Active darkens the fill to #9a3412. Focus outline 2px orange.