* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #f5f5f5;
    font-family: 'segoe ui', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    text-align: center;
}

#clock {
    font-size: 4rem;
    margin-bottom: 20px;
}

button {
    font-size: 1rem;
    border-radius: 8px;
    border: none;
    padding: 10px 20px;
    margin: 0 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#lightBtn {
    background-color: #ffffff;
    color: #333;
    border: 1px solid #ccc;
}

#darkBtn {
    background-color: #333;
    color: #ffffff;

}