Клавиатура Apple на CSS

<div class="keyboard" ontouchstart="">
    <div class="row"><button type="button" class="btn0"><span class="xs">esc</span>
        </button><button type="button" class="btn0"><span class="xs noxscale"><span class="emoji">&#128261;</span></span><span class="lr xxxs">F1</span>
        </button><button type="button" class="btn0"><span class="xs noxscale"><span class="emoji">&#128262;</span></span><span class="lr xxxs">F2</span>
        </button><button type="button" class="btn0"><span class="xs noxscale"><span class="cascade"></span><span class="block"></span></span><span class="lr xxxs">F3</span>
        </button><button type="button" class="btn0"><span class="xxxs noxscale"><span class="apps"></span></span><span class="lr xxxs">F4</span>
        </button><button type="button" class="btn0"><span class="lr xxxs">F5</span>
        </button><button type="button" class="btn0"><span class="lr xxxs">F6</span>
        </button><button type="button" class="btn0"><span class="sm"><span class="left"></span><span class="left"></span></span><span class="lr xxxs">F7</span>
        </button><button type="button" class="btn0"><span class="sm"><span class="right"></span><span class="pause"></span></span><span class="lr xxxs">F8</span>
        </button><button type="button" class="btn0"><span class="sm"><span class="right"></span><span class="right"></span></span><span class="lr xxxs">F9</span>
        </button><button type="button" class="btn0"><span class="xs noxscale"><span class="emoji">&#128264;</span></span><span class="lr xxxs">F10</span>
        </button><button type="button" class="btn0"><span class="xs noxscale"><span class="emoji">&#128265;</span></span><span class="lr xxxs">F11</span>
        </button><button type="button" class="btn0"><span class="xs noxscale"><span class="emoji">&#128266;</span></span><span class="lr xxxs">F12</span>
        </button><button type="button" class="btn0"><span class="xs noxscale">⏏</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn1"><span class="lr xxxs">F13</span>
        </button><button type="button" class="btn1"><span class="lr xxxs">F14</span>
        </button><button type="button" class="btn1"><span class="lr xxxs">F15</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn1"><span class="lr xxxs">F16</span>
        </button><button type="button" class="btn1"><span class="lr xxxs">F17</span>
        </button><button type="button" class="btn1"><span class="lr xxxs">F18</span>
        </button><button type="button" class="btn1"><span class="lr xxxs">F19</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn2"><span class="sm">~<br/>`</span>
        </button><button type="button" class="btn2"><span class="sm">!<br/>1</span>
        </button><button type="button" class="btn2"><span class="sm">@<br/>2</span>
        </button><button type="button" class="btn2"><span class="sm">#<br/>3</span>
        </button><button type="button" class="btn2"><span class="sm">$<br/>4</span>
        </button><button type="button" class="btn2"><span class="sm">%<br/>5</span>
        </button><button type="button" class="btn2"><span class="sm">^<br/>6</span>
        </button><button type="button" class="btn2"><span class="sm">&amp;<br/>7</span>
        </button><button type="button" class="btn2"><span class="sm">*<br/>8</span>
        </button><button type="button" class="btn2"><span class="sm">(<br/>9</span>
        </button><button type="button" class="btn2"><span class="sm">)<br/>0</span>
        </button><button type="button" class="btn2"><span class="sm">_<br/>-</span>
        </button><button type="button" class="btn2"><span class="sm">+<br/>=</span>
        </button><button type="button" class="btn3"><span class="lr xs">delete</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn2"><span class="xs">fn</span>
        </button><button type="button" class="btn2"><span class="xs">home</span>
        </button><button type="button" class="btn2"><span class="xs">page up</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn2"><span class="xs">clear</span>
        </button><button type="button" class="btn2"><span>=</span>
        </button><button type="button" class="btn2"><span>/</span>
        </button><button type="button" class="btn2"><span>*</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn3"><span class="ll xs">tab</span>
        </button><button type="button" class="btn2"><span>Q</span>
        </button><button type="button" class="btn2"><span>W</span>
        </button><button type="button" class="btn2"><span>E</span>
        </button><button type="button" class="btn2"><span>R</span>
        </button><button type="button" class="btn2"><span>T</span>
        </button><button type="button" class="btn2"><span>Y</span>
        </button><button type="button" class="btn2"><span>U</span>
        </button><button type="button" class="btn2"><span>I</span>
        </button><button type="button" class="btn2"><span>O</span>
        </button><button type="button" class="btn2"><span>P</span>
        </button><button type="button" class="btn2"><span class="sm">{<br/>[</span>
        </button><button type="button" class="btn2"><span class="sm">}<br/>]</span>
        </button><button type="button" class="btn2"><span class="sm">|<br/>\</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn2"><span class="xs noxpad">delete⌦</span>
        </button><button type="button" class="btn2"><span class="xs">end</span>
        </button><button type="button" class="btn2"><span class="xs">page down</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn2"><span>7</span>
        </button><button type="button" class="btn2"><span>8</span>
        </button><button type="button" class="btn2"><span>9</span>
        </button><button type="button" class="btn2"><span>-</span>
        </button>
    </div>
    <div class="row"><button type="button" id="caps-lock" class="btn4"><span class="ul xs">•</span><span class="ll xs">caps lock</span>
        </button><button type="button" class="btn2"><span>A</span>
        </button><button type="button" class="btn2"><span>S</span>
        </button><button type="button" class="btn2"><span>D</span>
        </button><button type="button" class="btn2"><span>F</span><span class="bump"></span>
        </button><button type="button" class="btn2"><span>G</span>
        </button><button type="button" class="btn2"><span>H</span>
        </button><button type="button" class="btn2"><span>J</span><span class="bump"></span>
        </button><button type="button" class="btn2"><span>K</span>
        </button><button type="button" class="btn2"><span>L</span>
        </button><button type="button" class="btn2"><span class="sm">:<br/>;</span>
        </button><button type="button" class="btn2"><span class="sm">&quot;<br/>'</span>
        </button><button type="button" class="btn4"><span class="lr xs">return</span>
        </button>
    </div>
    <div class="row"></div>
    <div class="row"><button type="button" class="btn2"><span>4</span>
        </button><button type="button" class="btn2"><span>5</span><span class="bump"></span>
        </button><button type="button" class="btn2"><span>6</span>
        </button><button type="button" class="btn2"><span>+</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn5"><span class="ll xs">shift</span>
        </button><button type="button" class="btn2"><span>Z</span>
        </button><button type="button" class="btn2"><span>X</span>
        </button><button type="button" class="btn2"><span>C</span>
        </button><button type="button" class="btn2"><span>V</span>
        </button><button type="button" class="btn2"><span>B</span>
        </button><button type="button" class="btn2"><span>N</span>
        </button><button type="button" class="btn2"><span>M</span>
        </button><button type="button" class="btn2"><span class="sm">&lt;<br/>,</span>
        </button><button type="button" class="btn2"><span class="sm">&gt;<br/>.</span>
        </button><button type="button" class="btn2"><span class="sm">?<br/>/</span>
        </button><button type="button" class="btn5"><span class="lr xs">shift</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn2"><span><span class="up"></span></span></button>
    </div>
    <div class="row"><button type="button" class="btn2"><span>1</span>
        </button><button type="button" class="btn2"><span>2</span>
        </button><button type="button" class="btn2"><span>3</span>
        </button><button type="button" class="btn10"><span class="lr xs">enter</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn7"><span class="ll xs">control</span>
        </button><button type="button" class="btn6"><span class="ul xxs">alt</span><span class="ll xs">option</span>
        </button><button type="button" class="btn7"><span class="ll xs">command</span><span class="lr xs noxscale">⌘</span>
        </button><button type="button" class="btn-longest"><span></span>
        </button><button type="button" class="btn7"><span class="ll xs noxscale">⌘</span><span class="lr xs">command</span>
        </button><button type="button" class="btn6"><span class="ur xxs">alt</span><span class="lr xs">option</span>
        </button><button type="button" class="btn7"><span class="lr xs">control</span>
        </button>
    </div>
    <div class="row"><button type="button" class="btn2"><span><span class="left"></span></span></button><button type="button" class="btn2"><span><span class="down"></span></span></button><button type="button" class="btn2"><span><span class="right"></span></span></button>
    </div>
    <div class="row"><button type="button" class="btn9"><span>0</span>
        </button><button type="button" class="btn8"><span>.</span>
        </button>
    </div>
</div>

*, *:before, *:after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
:root {
    font-size: 16px;
}
body, button {
    font: 1em -apple-system, BlinkMacSystemFont,"Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}
button {
    background-color: #eee;
    border: 0;
    border-radius: 0.125em;
    box-shadow:
        -0.2em -0.125em 0.125em rgba(0, 0, 0, 0.25), 
        0 0 0 0.04em rgba(0, 0, 0, 0.3), 
        0.02em 0.02em 0.02em rgba(0, 0, 0, 0.4) inset, 
        -0.05em -0.05em 0.02em rgba(255, 255, 255, 0.8) inset;
    color: #777;
    font-size: 1em;
    outline: 0;
    position: relative;
    vertical-align: top;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
button:not(:last-of-type) {
    margin-right: 0.35em;
}
button:active {
    box-shadow:
        0.1em 0.1em 0.1em rgba(0, 0, 0, 0.2),
        0 0 0 0.05em rgba(0, 0, 0, 0.4), 
        -0.025em -0.05em 0.025em rgba(255, 255, 255, 0.8) inset;
}
button span {
    display: inline-block;
}
button > span {
    margin: auto;
    padding: 0.2em 0.375em;
    position: absolute;
    top: 50%;
    left: 0;
    font-size: 0.5em;
    line-height: 2;
    transform: translateY(-50%) scaleX(0.875);
    width: 100%;
}

/* Keyboard */
.keyboard {
    background-image: linear-gradient(90deg, #888, #ccc);
    border-radius: 0.5em;
    box-shadow: -1em -1em 1.5em rgba(0, 0, 0, 0.6), 0 0 0 1px #aaa inset;
    display: grid;
    grid-template-columns: 21.25em 4.125em 5.65em;
    grid-template-rows: 0.75em 1.125em 1.125em 1.125em 1.125em 1.375em;
    grid-gap: 0.375em 0.875em;
    font-size: 36px;
    margin: 3em auto 0 auto;
    padding: 0.25em;
    width: 33.25em;
    height: 9em;
}
.row:nth-of-type(14) {
    text-align: center;
}
.row:nth-of-type(n + 14):nth-of-type(-3n + 17) {
    transform: translateY(0.25em);
}
.bump {
    border-radius: 0.1em;
    box-shadow: -0.05em -0.02em 0 0.05em rgba(0, 0, 0, 0.3);
    padding: 0;
    top: 85%;
    left: calc(50% - 0.4em);
    width: 0.8em;
    height: 0.15em;
}

/* Button size */
.btn0 {
    width: 1.19em;
    height: 0.75em;
}
.btn1 {
    width: 1.125em;
    height: 0.75em;
}
.btn2 {
    width: 1.125em;
    height: 1.125em;
}
.btn3 {
    width: 2em;
    height: 1.125em;
}
.btn4 {
    width: 2.3em;
    height: 1.125em;
}
.btn5 {
    width: 3.05em;
    height: 1.125em;
}
.btn6 {
    width: 1.5625em;
    height: 1.375em;
}
.btn7 {
    width: 1.8375em;
    height: 1.375em;
}
.btn8 {
    width: 1.125em;
    height: 1.375em;
}
.btn9 {
    width: 2.6875em;
    height: 1.375em;
}
.btn10 {
    width: 1.125em;
    height: 2.875em;
}
.btn-longest {
    width: 8.625em;
    height: 1.375em;
}

/* Button text alignment */
.ul, .ll, .ur, .lr {
    top: 0;
    transform: scaleX(0.875);
}
.ul, .ll {
    text-align: left;
    transform-origin: 0 50%;
}
.ur, .lr {
    text-align: right;
    transform-origin: 100% 50%;
}
.ll, .lr {
    top: auto;
    bottom: 0;
}
.noxscale {
    transform: translateY(-50%) scaleX(1);
}
.ll.noxscale, .lr.noxscale {
    transform: scaleX(1);
}

/* Button font size */
.xxxs {
    font-size: 0.2em;
    line-height: 1.5;
}
.xxs {
    font-size: 0.25em;
    line-height: 1.5;
}
.xs {
    font-size: 0.3em;
    line-height: 1.125;
}
.sm {
    font-size: 0.4em;
    line-height: 1.25;
}

/* Icons */
.up, .right, .down, .left {
    width: 0;
    height: 0;
    vertical-align: 0.1em;
}
.up {
    border-left: 0.25em solid transparent;
    border-right: 0.25em solid transparent;
    border-bottom: 0.5em solid currentColor;
}
.right {
    border-left: 0.5em solid currentColor;
    border-top: 0.25em solid transparent;
    border-bottom: 0.25em solid transparent;
}
.down {
    border-left: 0.25em solid transparent;
    border-right: 0.25em solid transparent;
    border-top: 0.5em solid currentColor;
}
.left {
    border-right: 0.5em solid currentColor;
    border-top: 0.25em solid transparent;
    border-bottom: 0.25em solid transparent;
}
.pause {
    border-left: 0.2em solid;
    border-right: 0.2em solid;
    vertical-align: 0.1em;
    width: 0.475em;
    height: 0.5em;
}
.emoji {
    filter: saturate(0);
    -webkit-filter: saturate(0);
}
.cascade:before, .cascade:after, .block {
    border: 1px solid;
}
.cascade {
    position: relative;
    height: 1em;
    width: 1.2em;
}
.cascade:before, .cascade:after {
    content: "";
    position: absolute;
    height: 0.45em;
    width: 0.8em;
}
.cascade:before {
    top: 0;
    left: 0;
}
.cascade:after {
    right: 0;
    bottom: 0;
}
.block {
    margin-left: 0.1em;
    height: 0.8em;
    width: 0.6em;
    vertical-align: 0.1em;
}
.apps:before, .apps:after {
    font-weight: bold;
    display: block;
    content: "\25A1\25A1\25A1";
    line-height: 0.875;
}

/* Miscellaneous */
.on {
  color: #8dff00;
  text-shadow: 0 0 2px #478800;
}
.noxpad {
    padding: 0.2em 0;
}

/* IE 11 fix */
@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
  .keyboard {
        display: -ms-grid;
        -ms-grid-columns: 22.125em 5em 5.75em;
        -ms-grid-rows: 1.125em 1.5em 1.5em 1.5em 1.5em 1.375em;
    }
    .row:nth-child(3n + 2) {
        -ms-grid-column: 2;
    }
    .row:nth-child(3n + 3) {
        -ms-grid-column: 3;
    }
    .row:nth-child(n + 4):nth-child(-n + 6) {
        -ms-grid-row: 2;
    }
    .row:nth-child(n + 7):nth-child(-n + 9) {
        -ms-grid-row: 3;
    }
    .row:nth-child(n + 10):nth-child(-n + 12) {
        -ms-grid-row: 4;
    }
    .row:nth-child(n + 13):nth-child(-n + 15) {
        -ms-grid-row: 5;
    }
    .row:nth-child(n + 16) {
        -ms-grid-row: 6;
    }
    .row:nth-of-type(14) button {
        transform: translateX(-0.5em);
    }
}