body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
.calendar {
    max-width: 400px;
    margin: 20px auto;
    border: 1px solid #ccc;
    border-radius: 5px;
    overflow: hidden;
}
.header {
    background-color: lightgreen;
    text-align: center;
    padding: 10px;
}
.days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
}
.day {
    padding: 10px;
    border-right: 1px solid #ccc;
    border-bottom: 1px solid #ccc;
    position: relative;
    cursor: pointer;
}
.today {
    background-color: lightblue}
.event-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(79, 20, 215, 0.8);
    border: 1px solid #ccc;
    padding: 5px;
    display: none;
    z-index: 999;
}