body {
    font-family: Arial, sans-serif;
    background-color: #f2f2f2;
    padding: 20px;
}

h1, h2 {
    text-align: center;
}

.container {
    max-width: 700px;
    margin: 0 auto;
    background-color: #ffffff;
    padding: 20px;
    border-radius: 6px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

label {
    display: block;
    margin-top: 10px;
    font-weight: bold;
}

input[type="text"],
input[type="date"],
textarea,
select {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    box-sizing: border-box;
}

textarea {
    height: 80px;
}

button {
    margin-top: 15px;
    padding: 8px 16px;
    border: none;
    cursor: pointer;
    border-radius: 4px;
}

#submitBtn {
    background-color: #007bff;
    color: #fff;
}

#cancelEditBtn {
    background-color: #6c757d;
    color: #fff;
    margin-left: 5px;
}

.task {
    border: 1px solid #ddd;
    border-left: 4px solid #007bff;
    padding: 10px;
    margin-top: 10px;
    border-radius: 4px;
    background-color: #fafafa;
}

.task h3 {
    margin: 0;
}

.task button {
    margin-right: 5px;
    background-color: #dc3545;
    color: #fff;
}

.task button.editBtn {
    background-color: #28a745;
}

#messageBox {
    margin-bottom: 15px;
    padding: 8px;
    border-radius: 4px;
}

#messageBox.error {
    background-color: #f8d7da;
    color: #721c24;
}

#messageBox.success {
    background-color: #d4edda;
    color: #155724;
}