Progress bar fill
Progress bar fill: a CSS button. Copy the rules, or the prompt that rebuilds it.
CSS
.btn-084 {
position: relative;
overflow: hidden;
font: 600 14px/1 system-ui,sans-serif;
color: #065f46;
background: #ecfdf5;
border: 1px solid #6ee7b7;
border-radius: 8px;
padding: 12px 24px;
cursor: progress
}
.btn-084::before {
content: "";
position: absolute;
inset: 0;
width: 0;
background: #a7f3d0;
animation: btn-084-p 2.4s ease-in-out infinite
}
@keyframes btn-084-p {
0% {
width: 0
}
70% {
width: 100%
}
100% {
width: 100%;
opacity: 0
}
}
.btn-084 span {
position: relative
}
.btn-084:focus-visible {
outline: 2px solid #059669;
outline-offset: 3px
}
@media (prefers-reduced-motion: reduce) {
.btn-084, .btn-084 * { animation: none; transition: none; }
}
HTML
<button class="btn-084" disabled><span>Uploading</span></button>Prompt
A pale green loading button (#ecfdf5 fill, 1px #6ee7b7 border, dark green text #065f46 at 14px semibold, 8px radius, 12px by 24px padding, disabled) where a mint #a7f3d0 bar grows from the left edge to full width over 2.4s, fades out, and repeats, behind the text "Uploading".