body {
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Arial', sans-serif;
    background: #1e1e2f;
    color: #f5f5f7;
}

.stopwatch {
    background: #2e2e3e;
    padding: 20px 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    animation: fadeIn 1s ease-in-out;
}

.time-display {
    font-size: 48px;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.buttons button {
    padding: 10px 20px;
    margin: 5px;
    border: none;
    border-radius: 5px;
    background-color: #3a3a4a;
    color: #f5f5f7;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.buttons button:hover {
    background-color: #4a4a5a;
    transform: scale(1.1);
}

.buttons button:active {
    transform: scale(1);
}

#startPauseBtn.start {
    background-color: #4caf50;
}

#startPauseBtn.pause {
    background-color: #f44336;
}

#resetBtn {
    background-color: #ff9800;
}

#lapBtn {
    background-color: #2196f3;
}

#laps {
    list-style: none;
    padding: 0;
    margin-top: 20px;
    max-height: 200px;
    overflow-y: auto;
}

#laps li {
    background: #3a3a4a;
    padding: 10px;
    margin: 5px 0;
    border-radius: 5px;
    font-size: 18px;
    display: flex;
    justify-content: space-between;
    animation: fadeInUp 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}