@layer demo, countdown;

@layer countdown {
  .countdown {
    width: fit-content;
    display: inline-grid;
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    gap: 1rem;
  }
  .countdown > .part {
    display: grid;
    gap: 0.5rem;
  }
  .countdown > .part > .number {
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    border-radius: 50%;
    border: 1px solid hsl(0 0% 50% / 0.5);
    font-size: 2.3rem;
    position: relative;
  }
  .countdown > .part.days {
    --num: 365;
  }
  .countdown > .part.hours {
    --num: 24;
  }
  .countdown > .part:where(.minutes, .seconds) {
    --num: 60;
  }
  .countdown > .part > .number::after {
    content: "";
    position: absolute;
    inset: calc(var(--border-size) * -0.5);
    border-radius: inherit;

    --degree: calc(360deg / var(--num) * (var(--num) - var(--value, 0)));
    background-image: conic-gradient(
      var(--accent) var(--degree),
      transparent calc(var(--degree) + 0.1deg)
    );

    --border-size: 4px;
    --mask-image: radial-gradient(
      100% 100%,
      transparent calc(50% - var(--border-size)),
      black calc(50% - var(--border-size) + 1px)
    );
    -webkit-mask-image: var(--mask-image);
    mask-image: var(--mask-image);
  }
  .countdown > .part > .text {
    text-align: center;
    opacity: 1;
    font-size: 20px;
    font-weight: 600;
    text-transform: uppercase;
  }
}
@layer demo {
  * {
    box-sizing: border-box;
  }
  body {
    background-color: #060d1f;
    color: #fefefe;
    font-family: system-ui, sans-serif;
    text-align: center;
  }
  h2 {
    margin-top: 4rem;
  }
}