style.css

body {
	padding: 0 6px;
}

a {
	color: inherit;
}

.title {
	font-family: 'JetBrains Mono', monospace;
	font-weight: 600;
	font-size: 10px;
	text-align: center;
	margin-bottom: 10px;
}

.flex {
	display: flex;
}

.justify-center {
	justify-content: center;
}

.underline {
	text-decoration: underline;
}

#download {
	align-items: center;
	appearance: none;
	background-image: radial-gradient(100% 100% at 100% 0, #5adaff 0, #5468ff 100%);
	border: 0;
	border-radius: 6px;
	box-shadow: rgba(45, 35, 66, 0.4) 0 2px 4px, rgba(45, 35, 66, 0.3) 0 7px 13px -3px, rgba(58, 65, 111, 0.5) 0 -3px 0 inset;
	box-sizing: border-box;
	color: #fff;
	cursor: pointer;
	display: flex;
	font-family: 'JetBrains Mono', monospace;
	height: 48px;
	justify-content: center;
	line-height: 1;
	list-style: none;
	overflow: hidden;
	padding-left: 16px;
	padding-right: 16px;
	position: relative;
	text-align: left;
	text-decoration: none;
	transition: box-shadow 0.15s, transform 0.15s;
	user-select: none;
	-webkit-user-select: none;
	touch-action: manipulation;
	white-space: nowrap;
	will-change: box-shadow, transform;
	font-size: 18px;
}

#download:disabled {
	background: #9ca3af;
	cursor: default;
}

#download:disabled:hover {
	background: #9ca3af;
	transform: translateY(0);
	box-shadow: rgba(45, 35, 66, 0.4) 0 2px 4px, rgba(45, 35, 66, 0.3) 0 7px 13px -3px, rgba(58, 65, 111, 0.5) 0 -3px 0 inset;
}

#download:focus {
	box-shadow: #3c4fe0 0 0 0 1.5px inset, rgba(45, 35, 66, 0.4) 0 2px 4px, rgba(45, 35, 66, 0.3) 0 7px 13px -3px, #3c4fe0 0 -3px 0 inset;
}

#download:hover {
	box-shadow: rgba(45, 35, 66, 0.4) 0 4px 8px, rgba(45, 35, 66, 0.3) 0 7px 13px -3px, #3c4fe0 0 -3px 0 inset;
	transform: translateY(-2px);
}

#download:active {
	box-shadow: #3c4fe0 0 3px 7px inset;
	transform: translateY(2px);
}

.spinner {
	animation: rotate 2s linear infinite;
	z-index: 2;
	position: absolute;
	top: 50%;
	left: 50%;
	margin: -25px 0 0 -25px;
	width: 50px;
	height: 50px;
}

.spinner .path {
	stroke: hsl(210, 70, 75);
	stroke-linecap: round;
	animation: dash 1.5s ease-in-out infinite;
}

@keyframes rotate {
	100% {
		transform: rotate(360deg);
	}
}

@keyframes dash {
	0% {
		stroke-dasharray: 1, 150;
		stroke-dashoffset: 0;
	}
	50% {
		stroke-dasharray: 90, 150;
		stroke-dashoffset: -35;
	}
	100% {
		stroke-dasharray: 90, 150;
		stroke-dashoffset: -124;
	}
}

#feedback {
	text-align: center;
	margin: 8px 0;
}

#feedback.error {
	color: #dc2626;
}

#feedback.success {
	color: #16a34a;
}