body {
    font-family: sans-serif;
    margin: 20px;
    background-color: #333;
    color: #eee;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.center {
    text-align: center;
}

.menu-container {
    display: flex;
    justify-content: flex-start;
    margin-bottom: 10px;
}

.menu-container a {
    margin-right: 10px;
}

#todo-list {
    width: 600px;
    margin-bottom: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    border: 1px solid #555;
    padding: 8px;
    text-align: left;
}

#add-task {
    margin-left: 10px;
}

.left {
    text-align: left;
}

#tips, #evaluation {
    width: 280px;
    border: 2px solid red;
    padding: 10px;
    margin: 10px;
}

#task-list td.done span {
    text-decoration: line-through;
    color: red;
}

#weekly-challenge {
    margin-top: 20px; /* Added margin for spacing */
    text-align: left;
}

#confetti-image {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    pointer-events: none;
    display: none;
}

#myChart {
    width: 400px;
    height: 400px;
    margin-top: 20px;
}