body {
    background-color: #000;
    color: #fff;
    font-family: Arial, sans-serif;
}

.profile {
    text-align: center;
    margin-top: 50px;
}

img {
    border-radius: 50%;
    width: 150px;
    height: 150px;
    cursor: pointer;
}

button {
    background-color: #FFD700;
    border: none;
    color: black;
    padding: 10px 20px;
    cursor: pointer;
}

#calendar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}

.month {
    margin: 10px;
}

.day {
    width: 40px;
    height: 40px;
    display: inline-block;
    border: 1px solid #fff;
    margin: 5px;
    text-align: center;
    line-height: 40px;
    cursor: pointer;
}

.vacation-taken {
    background-color: yellow;
    color: black;
}