html, body {
    width: 100vw;
    height: 100vh;
    position: absolute;
    margin: 0;
    top: 0;
    left: 0;
}
div.time-container {
    position: relative;
    top: 0;
    left: 0;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background-color: #f4f4f4;
}
#time {
    font-size: 12rem;
    color: #333;
}
.exit-btn {
    position: fixed;
    left: 20px;
    bottom: 20px;
    width: 6rem;
    height: 6rem;
    background-color: #f8f4e9;
    border: 2px solid #d4d4d4;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: #666;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: none;
    user-select: none;
}

.exit-btn:hover {
    background-color: #f0ebe0;
    color: #555;
}

.exit-btn:active {
    background-color: #e8e2d5;
    transform: scale(0.999);
}