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HTML

              
                <div class="c-timer">
    <div class="c-timer__clock">
        <div class="c-timer__clock--progress" style="--p: 75"></div>
        <div class="c-timer__clock--face">
            <h1 id="timer" class="c-timer__clock--time" contenteditable="true">15:00</h1>
            <div class="c-timer__clock--button">
                <button name="start" class="" type="button">start</button>
            </div>
            <div class="c-timer__clock--settings">
                <button name="settings" class="" type="button" onclick="focusTimer()">
                    <svg id="icon-cog" aria-hidden="true" width="32" height="32" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg"><g filter="url(#filter0_d_108_7)"><path d="M28 14V10H23.714C23.526 9.274 23.238 8.592 22.866 7.962L25.898 4.93L23.07 2.1L20.04 5.132C19.406 4.76 18.726 4.472 18 4.284V0H14V4.284C13.274 4.474 12.594 4.76 11.96 5.134L8.93 2.1L6.102 4.928L9.132 7.96C8.762 8.592 8.472 9.272 8.286 10H4V14H8.286C8.474 14.726 8.762 15.408 9.134 16.038L6.102 19.072L8.93 21.9L11.962 18.868C12.594 19.24 13.274 19.528 14.002 19.718V24H18.002V19.716C18.728 19.526 19.408 19.238 20.042 18.866L23.074 21.898L25.902 19.07L22.87 16.036C23.242 15.406 23.53 14.726 23.718 13.998H28V14ZM16 16C13.792 16 12 14.206 12 12C12 9.796 13.792 8 16 8C18.208 8 20 9.796 20 12C20 14.204 18.208 16 16 16Z" fill="#ffffff"/></g><defs><filter id="filter0_d_108_7" x="0" y="0" width="32" height="32" filterUnits="userSpaceOnUse" color-interpolation-filters="sRGB"><feFlood flood-opacity="0" result="BackgroundImageFix"/><feColorMatrix in="SourceAlpha" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 127 0" result="hardAlpha"/><feOffset dy="4"/><feGaussianBlur stdDeviation="2"/><feComposite in2="hardAlpha" operator="out"/><feColorMatrix type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.25 0"/><feBlend mode="normal" in2="BackgroundImageFix" result="effect1_dropShadow_108_7"/><feBlend mode="normal" in="SourceGraphic" in2="effect1_dropShadow_108_7" result="shape"/></filter></defs></svg>
                    <span class="sr-only">settings</span>
                </button>
            </div>                
        </div>
    </div>
</div>
              
            
!

CSS

              
                @font-face {
  font-family: 'Bebas Neue';
  src:  url('https://codepen.davidroessli.com/fonts/bebasneue-book-webfont.woff2') format('woff2'),
        url('https://codepen.davidroessli.com/fonts/bebasneue-book-webfont.woff') format('woff');
}
:root {
  --tool-color: #585858;
  --tool-color-hover: white;
  --clock-color: white;
  --progress-color: #900A0A;
  --clock-width: 500px;
  --progress-width: 18px;
}
body {
  background: radial-gradient(71.4% 71.4% at 51.7% 28.6%, #3A393F 0%, #17171A 100%);
  color:#fff;
}
.c-timer {
  height:100vh;
  width:100vw;
  display:flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.c-timer__clock {
  position: relative;
  width: var(--clock-width);
  height: var(--clock-width);
  border-radius: 50%;
  background: radial-gradient(71.4% 71.4% at 51.7% 28.6%, #3A393F 0%, #17171A 100%);
  box-shadow: inset 0px 0px 114px rgba(0, 0, 0, 0.45);

}
.c-timer__clock--progress {
  width: var(--clock-width);
  height: var(--clock-width);
  background:conic-gradient(from 90deg, black calc((100 - var(--p)) * 1%), var(--progress-color) 0);
  border-radius: 50%;
}
.c-timer__clock--face {
  position: absolute;
  top: calc(var(--progress-width) / 2);
  left: calc(var(--progress-width) / 2);
  width: calc(var(--clock-width) - var(--progress-width));
  height: calc(var(--clock-width) - var(--progress-width));

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;

  border-radius: 50%;
  background: radial-gradient(71.4% 71.4% at 51.7% 28.6%, #3A393F 0%, #17171A 100%);
  box-shadow: inset 0px 0px 114px rgba(0, 0, 0, 0.45);
}
h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-style: normal;
  font-weight: normal;
  font-size: 196px;
  line-height: 196px;
  text-shadow: 0px 4px 4px rgba(0, 0, 0, 0.25);

  margin-top: 20%;
}
[name="start"] {
  font-family: Montserrat;
  font-style: normal;
  font-weight: bold;
  font-size: 16px;
  line-height: 20px;
  text-align: center;
  letter-spacing: 0.6em;
  text-shadow: 0px 4px 4px rgba(0, 0, 0, 0.25);

  color: var(--clock-color);
  text-transform:uppercase;
  transition: transform 0.25s ease-in-out;
}
[name="start"]:focus,
[name="start"]:hover {
  color: var(--tool-color-hover);
  transform: scale(1.3);
}
[name="settings"] #icon-cog g path {
  fill: var(--tool-color);
  transition: fill 0.25s ease-in-out;
}
[name="settings"]:focus #icon-cog g path,
[name="settings"]:hover #icon-cog g path {
  fill: var(--tool-color-hover);
}

              
            
!

JS

              
                /*
  Not much functionality by lack of time -- this is the advent of CSS after all ;)
*/
focusTimer = function getFocus() {
  document.getElementById("timer").focus();
}
              
            
!
999px

Console