body {
    background-color: #2c3e50;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    color: #d7fe4d;
}

#container {
    text-align: center;
}

.digit {
    font-size: 150px;
    font-weight: bold;
}

.text {
    font-size: 40px;
    font-weight: bold;
}

#btn-container {
    text-align: center;
    margin-top: 60px;
}

.btn {
    padding: 7px 25px;
    font-size: 15px;
    margin: 0px 20px;
    color: white;
    border: 2px solid white;
    cursor: pointer;
}

#start {
    background-color: #1abc9c;
}

#stop {
    background-color: #3498db;
}

#reset {
    background-color: #e74c3c;
}