* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font: inherit;
}
:root {
  font-size: 62.5%;
  --clr-primary-500: hsl(265 100 50);
  --clr-primary-600: hsl(265 100 60);
  --clr-primary-700: hsl(265 100 70);
  --clr-primary-800: hsl(265 100 80);
  --clr-primary-900: hsl(265 100 90);
  --clr-text: hsl(265 50 90);
  --clr-text-bold: hsl(265 50 95);
  --clr-text-button: hsl(265 45 25);
  --clr-positive: hsl(240 100 70);
  --clr-negative: hsl(0 100 70);
  --center-margin: 32px;
  --stop-watch-vertical-max-width: 408px;
  --stop-watch-horizontal-max-width: 768px;
  --stop-watch-vertical-max-height: 432px;
  --stop-watch-horizontal-max-height: 280px;
}
.app {
  box-sizing: content-box;
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--clr-primary-900);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  font-size: 1.6rem;
}
.stop-watch {
  position: absolute;
  display: grid;
  grid-template-rows: 1fr 1fr;
  border: 1px solid var(--clr-text-button);
  gap: 8px;
  padding: 16px;
  width: 100vw;
  max-width: var(--stop-watch-vertical-max-width);
  background: linear-gradient(var(--clr-primary-500), var(--clr-primary-600));
  color: var(--clr-text);
}
.stop-watch--margin-inline {
  max-width: calc(var(--stop-watch-vertical-max-width) - var(--center-margin));
}
.stop-watch--margin-block {
  max-height: calc(var(--stop-watch-vertical-max-height) - var(--center-margin));
}
.stop-watch--center {
  border-radius: 16px;
  box-shadow: 8px 8px 8px rgba(0 0 0 / 0.25);
}
.times {
  display: grid;
  grid-template-rows: 1fr 1fr;
  align-items: center;
  gap: 8px;
}
.running-time {
  width: 262px;
  justify-self: center;
  font-size: 5.2rem;
}
.running-time--started {
  font-weight: 500;
  color: var(--clr-text-bold);
}
.running-time--paused {
  font-weight: 500;
  color: var(--clr-text);
}
.lap-times {
  display: grid;
  grid-template-columns: repeat(auto-fill, minMax(96px, 1fr));
  align-items: start;
  gap: 8px;
  height: 104px;
  overflow-y: auto;
  scrollbar-color: var(--clr-primary-900) transparent;
  padding: 8px;
}
.lap-time {
  display: grid;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--clr-text-bold);
  background-color: var(--clr-primary-600);
  padding: 8px;
  text-align: center;
}
.lap-time--record {
  outline: 1px solid var(--clr-text-bold);
  color: var(--clr-text-button);
  font-weight: 500;
}
.lap-time--fastest {
  background-color: var(--clr-positive);
  color: var(--clr-positive-text);
}
.lap-time--slowest {
  background-color: var(--clr-negative);
  color: var(--clr-negative-text);
}
.stop-watch-buttons {
  display: grid;
  grid-template-rows: 1fr 1fr 1fr;
  gap: 8px;
}
.stop-watch-button {
  border: none;
  border-radius: 128px;
  padding: 8px 16px;
  text-transform: capitalize;
  font-weight: 500;
  color: var(--clr-text-button);
  background-color: var(--clr-primary-900);
  cursor: pointer;
}
.stop-watch-button--cta {
  outline: 1px solid var(--clr-text-bold);
  color: var(--clr-text-bold);
}
.stop-watch-button--start {
  background-color: var(--clr-positive);
}
.stop-watch-button--stop {
  background-color: var(--clr-negative);
}
@media (hover: hover) {
  .stop-watch-button:hover {
    outline: 2px solid var(--clr-text-bold);
    background-color: transparent;
    color: var(--clr-text-bold);
  }
}
@media (min-width: 640px) {
  .stop-watch {
    grid-template-rows: none;
    grid-template-columns: 1fr 1fr;
    max-width: var(--stop-watch-horizontal-max-width);
  }
  .stop-watch--margin-inline {
    max-width: calc(var(--stop-watch-horizontal-max-width) - var(--center-margin));
  }
  .stop-watch--margin-block {
    max-height: calc(var(--stop-watch-horizontal-max-height) - var(--center-margin));
  }
}