*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}
body{
    background: linear-gradient(45deg,#0a0a0a, #3a4452);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh; /* min height is required to center it vertically */
    flex-direction: column;
}
.stopwatch{
    background-color: transparent;
    padding: 20px 60px;
    border-radius: 10px;
    border: 1px solid black;
    box-shadow: 0px 0px 15px black;
}
#timerDisplay{
    font-size: 60px;
    font-weight: 600;
}
.buttons{
    margin-top: 20px;
}
.btn{
    font-size: 20px;
    background: none;
    border-radius: 5px;
    border: 1px solid black;
    box-shadow: 0px 0px 15px black;
    color: var(--clr);
    padding: 20px 50px;
    margin: 0px 010px;
    cursor: pointer;
}
.btn:hover{
  background-color: rgba(0, 0, 0, 0.3);
}