苹果键盘UI

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html

css

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html

<div class="keyboard">
	<button class="keyboard__key keyboard__key--meta" type="button" data-key="cmd">
		<span class="keyboard__key-lines">
			<svg class="keyboard__cmd keyboard__key-line--tr" viewBox="0 0 16 16" width="16px" height="16px" aria-hidden="true">
				<path fill="none" stroke="currentcolor" stroke-width="2" d="M5.7,10.3v2.3c0,1.3-1,2.3-2.3,2.3S1,14,1,12.7s1-2.3,2.3-2.3H5.7z M5.7,10.3h4.7 M5.7,10.3V5.7M10.3,10.3v2.3c0,1.3,1,2.3,2.3,2.3s2.3-1,2.3-2.3s-1-2.3-2.3-2.3H10.3z M10.3,10.3V5.7 M10.3,5.7H5.7 M10.3,5.7V3.3c0-1.3,1-2.3,2.3-2.3S15,2,15,3.3s-1,2.3-2.3,2.3H10.3z M5.7,5.7V3.3C5.7,2,4.6,1,3.3,1S1,2,1,3.3s1,2.3,2.3,2.3H5.7z" />
			</svg>
			<small class="keyboard__key-line keyboard__key-line--small keyboard__key-line--br">command</small>
		</span>
	</button>
	<button class="keyboard__key" type="button" data-key="c">
		<span class="keyboard__key-lines">
			<span class="keyboard__key-line">C</span>
		</span>
	</button>
	<button class="keyboard__key" type="button" data-key="v">
		<span class="keyboard__key-lines">
			<span class="keyboard__key-line">V</span>
		</span>
	</button>
</div>

css

* {
	border: 0;
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
:root {
	--hue: 0;
	--sat: 0%;
	--bg: hsl(var(--hue),var(--sat),90%);
	--fg: hsl(var(--hue),var(--sat),10%);
	--trans-dur: 0.3s;
	font-size: calc(16px + (24 - 16) * (100vw - 320px) / (2560 - 320));
}
body,
button {
	color: var(--fg);
	font: 1em/1.5 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, sans-serif;
}
body {
	background-color: var(--bg);
	background-image: linear-gradient(-45deg,hsla(var(--hue),var(--sat),0%,0),hsla(var(--hue),var(--sat),0%,0.3));
	display: flex;
	height: 100vh;
	transition:
		background-color var(--trans-dur),
		color var(--trans-dur);
}
.keyboard,
.keyboard:before,
.keyboard:after {
	transition:
		background-color var(--trans-dur),
		box-shadow var(--trans-dur);
}
.keyboard,
.keyboard__key-lines {
	display: flex;
}
.keyboard {
	background-color: hsl(var(--hue),var(--sat),80%);
	background-image: linear-gradient(90deg,hsla(var(--hue),var(--sat),10%,0.4),hsla(var(--hue),var(--sat),10%,0));
	border-radius: 0.75em;
	box-shadow:
		-0.5em -0.5em 0.75em hsla(0,0%,0%,0.6),
		0 0 0 1px hsl(var(--hue),var(--sat),67%) inset;
	align-items: center;
	margin: auto;
	padding: 0.375em;
	position: relative;
	width: 18.5em;
	height: 6.5em;
}
.keyboard:before,
.keyboard:after {
	background-color: hsl(var(--hue),var(--sat),90%);
	content: "";
	display: block;
	position: absolute;
	bottom: 100%;
}
.keyboard:before {
	box-shadow:
		-0.5em -0.5em 0.75em hsla(0,0%,0%,0.6),
		0.25em 0 0.25em hsla(var(--hue),var(--sat),10%,0.2) inset,
		0.25em -1.25em 0.5em hsla(var(--hue),var(--sat),10%,0.5) inset;
	left: calc(50% - 0.5em);
	width: 1em;
	height: 40em;
}
.keyboard:after {
	border-radius: 0.25em 0.25em 0 0;
	box-shadow: 0.375em -0.25em 0.5em hsla(var(--hue),var(--sat),10%,0.5) inset;
	left: calc(50% - 0.75em);
	width: 1.5em;
	height: 1.25em;
}
.keyboard__cmd {
	display: block;
	width: 1em;
	height: 1em;
}
.keyboard__key {
	background-color: hsl(var(--hue),var(--sat),95%);
	border-radius: 0.5em;
	box-shadow:
		-0.4em -0.25em 0.25em hsla(0,0%,0%,0.25),
		0 0 0 0.1em hsla(0,0%,0%,0.3),
		0.04em 0.04em 0.04em hsla(0,0%,0%,0.4) inset,
		-0.1em -0.1em 0.04em hsla(0,0%,100%,0.8) inset;
	color: hsl(var(--hue),var(--sat),50%);
	margin: 0 0.375em;
	outline: transparent;
	padding: 0.75em;
	position: relative;
	width: 5em;
	height: 5em;
	transition:
		background-color var(--trans-dur),
		box-shadow 0.15s,
		color var(--trans-dur);
	-webkit-appearance: none;
	appearance: none;
	-webkit-user-select: none;
	-moz-user-select: none;
	user-select: none;
	-webkit-tap-highlight-color: transparent;
}
.keyboard__key--meta {
	width: 5.5em;
}
.keyboard__key:active,
.keyboard__key.active {
	box-shadow:
		0 0 0.2em hsla(0,0%,0%,0.2),
		0 0 0 0.1em hsla(0,0%,0%,0.4),
		0 -0.05em 0 hsla(0,0%,0%,0.6) inset,
		-0.05em -0.15em 0.05em hsla(0,0%,100%,0.8) inset;
}
.keyboard__key-line {
	font-size: 2em;
	line-height: 1;
}
.keyboard__key-line--small {
	font-size: 0.875em;
}
.keyboard__key-line--tr {
	margin: 0 0 auto auto;
}
.keyboard__key-line--br {
	margin: auto 0 0 auto;
}
.keyboard__key-lines {
	display: flex;
	justify-content: center;
	align-items: center;
	flex-direction: column;
	width: 100%;
	height: 100%;
	transition: transform 0.15s;
}
.keyboard__key:active .keyboard__key-lines,
.keyboard__key.active .keyboard__key-lines {
	transform: translateY(-1px);
}
.keyboard__key:before {
	box-shadow: 0 0 0 0.5em hsla(223,90%,50%,0);
	border-radius: 0.5em;
	content: "";
	display: block;
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	transition: box-shadow var(--trans-dur);
}
.keyboard__key:focus-visible:before {
	box-shadow: 0 0 0 0.5em hsla(223,90%,50%,0.5);
}

/* Dark theme */
@media (prefers-color-scheme: dark) {
	:root {
		--bg: hsl(var(--hue),var(--sat),20%);
		--fg: hsl(var(--hue),var(--sat),90%);
	}
	.keyboard__key {
		background-color: hsl(var(--hue),var(--sat),15%);
		box-shadow:
			-0.4em -0.25em 0.25em hsla(0,0%,0%,0.25),
			0 0 0 0.1em hsla(0,0%,0%,0.3),
			0.04em 0.04em 0.04em hsla(0,0%,0%,0.4) inset,
			-0.1em -0.1em 0.04em hsla(0,0%,100%,0.05) inset;
		color: hsl(var(--hue),var(--sat),90%);
	}
	.keyboard__key:active,
	.keyboard__key.active {
		box-shadow:
			0 0 0.2em hsla(0,0%,0%,0.2),
			0 0 0 0.1em hsla(0,0%,0%,0.4),
			0 -0.05em 0 hsla(0,0%,0%,0.4) inset,
			-0.05em -0.15em 0.05em hsla(0,0%,100%,0.05) inset;
	}
}

JavaScript

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