.box {
    width: 200px;
    height: 200px;
    margin: 30px auto;
    background-color: white;
    border: 1px solid #ccc;
}

.btn {
    padding: 10px 20px;
    margin: 10px;
    border: none;
    color: white;
    font-size: 16px;
    cursor: pointer;
    border-radius: 4px;
}

.start-btn {
    background-color: #4CAF50;
}

.stop-btn {
    background-color: #8BC34A;
}

.hint {
    text-align: center;
    margin-bottom: 30px;
}

.section {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/*h2 {*/
/*    font-size: 20px;*/
/*    margin-top: 30px;*/
/*}*/


.result-time {
    /*height: 30px;*/
}

.table-content {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}