body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f4f6f9;
}

.center {
    text-align: center;
    margin-top: 20px;
}

.auth-container {
    width: 300px;
    margin: 100px auto;
    text-align: center;
    background: white;
    padding: 20px;
    border-radius: 8px;
}

input {
    width: 90%;
    padding: 8px;
    margin: 8px 0;
}

button {
    padding: 8px 15px;
    margin: 5px;
    cursor: pointer;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
}

button:hover {
    background: #0056b3;
}

.menu-container {
    text-align: center;
    margin-top: 40px;
}

header {
    display: flex;
    justify-content: space-between;
    padding: 15px;
    background: #007bff;
    color: white;
}

.task-input {
    text-align: center;
    margin: 20px;
}

table {
    width: 90%;
    margin: auto;
    border-collapse: collapse;
    background: white;
}

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

th {
    background: #007bff;
    color: white;
}

tr:nth-child(even) {
    background: #f2f2f2;
}

.late {
    color: red;
    font-weight: bold;
}