@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% / .5);
    font-size: 38px;
    position: relative
  }
  .countdown > .part.gün { --num: 365 }
  .countdown > .part.saat { --num: 24 }
  .countdown > .part:where(.dakika, .saniye) { --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(#97c12f 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: 0.75
  }
}