body {
  background-color: #010101;
  color: #fbfaff;
}
body {
    font-family: 'Roboto', sans-serif;
  }
.value {
  position: absolute;
  top: 18%;
  text-align: center;
  font-size: 4rem;
  left: 50%; /**/
  transform: translateX(-50%);
}
.start {
  background-color: #6060e6;
  left: 20%;
}
.lap {
  background-color: #2d2d2f;
  color: #69696b;
  right: 20%;
}
.b {
  /* display : flex;
  justify-content: space-evenly ; */
  padding: 0 10%;
  
}

button {
  width: 15%;
  min-width: 60px;
  max-width: 120px;
  height: 5vh;
  font-size: 1rem;
  border-radius: 12px;
  margin: 1%;
  padding: 0.5em 1em;   /* padding نسبي */
  position: absolute;
  bottom : 30%;
}