body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #1c1f24;
    font-family: 'Arial', sans-serif;
    margin: 0;
    background: linear-gradient(to right, #1c1f24, #3a3f47);
}

.stopwatch-container {
    text-align: center;
    background-color: #343a40;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    color: #f8f9fa;
}

.time-circle {
    background-color: #2c2f33;
    border-radius: 50%;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.5);
    font-size: 2.5rem;
    font-weight: bold;
    width: 180px;
    height: 180px;
    line-height: 180px;
    margin: 0 auto 20px auto;
    color: #f8f9fa;
    transition: all 0.3s ease;
    border: 5px solid transparent;
}

.time-circle.start {
    border-color: #4caf50;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.5), 0 0 20px #4caf50;
}

.time-circle.stop {
    border-color: #e74c3c;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.5), 0 0 20px #e74c3c;
}

.buttons button {
    padding: 10px 20px;
    font-size: 1rem;
    margin: 5px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#startStopBtn {
    background-color: #4caf50;
    color: #f8f9fa;
}

#startStopBtn:hover {
    background-color: #388e3c;
}

#lapBtn {
    background-color: #f39c12;
    color: #f8f9fa;
}

#lapBtn:hover {
    background-color: #d68910;
}

#resetBtn {
    background-color: #e74c3c;
    color: #f8f9fa;
}

#resetBtn:hover {
    background-color: #c0392b;
}

.laps {
    margin-top: 20px;
    max-height: 150px;
    overflow-y: auto;
    border-top: 1px solid #7f8c8d;
    padding-top: 10px;
}

.laps .lap {
    padding: 5px 0;
    color: #f8f9fa;
}