body {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    background-image: url('https://cdn.pixabay.com/photo/2023/03/11/22/19/nature-7845443_1280.jpg');
    background-size: cover;
    background-position: center;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.stopwatch-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 320px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 15px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

h1, h2 {
    margin: 10px 0;
    color: #000000;
}

.time-display {
    font-size: 3rem;
    margin: 20px 0;
    color: #000000;
}

.button-group {
    display: flex;
    justify-content: center;
    gap: 15px;
}

button {
    padding: 12px 24px;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 8px;
    border: none;
    background-color: rgba(0, 0, 0, 0.5);
    color: rgb(255, 255, 255);
    transition: background-color 0.3s, transform 0.3s;
}

button:hover {
    background-color: rgba(7, 87, 88, 0.6);
    transform: scale(1.05);
}

ul {
    list-style-type: none;
    padding: 0;
    width: 100%;
    height: 150px; 
    overflow-y: auto;
    margin-top: 20px;
    color: #00CED1;
}

ul::-webkit-scrollbar {
    width: 8px;
}

ul::-webkit-scrollbar-thumb {
    background-color: rgba(0, 206, 209, 0.5);
    border-radius: 10px;
}

li {
    background-color: rgba(255, 255, 255, 0.5);
    padding: 12px;
    margin: 5px 0;
    border-radius: 8px;
    color: #004040;
}