body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1rem;
}

main {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

section {
    background-color: #fff;
    border-radius: 5px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

h2 {
    color: #333;
    margin-top: 0;
}

#balance {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

/* Add chart container styling */
#expenseChart {
    max-width: 400px;
    max-height: 400px;
    margin: 0 auto;
    display: block;
}

form {
    display: grid;
    gap: 1rem;
}

input, select, button {
    padding: 0.5rem;
    font-size: 1rem;
}

button {
    background-color: #333;
    color: #fff;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #555;
}

#transactionList {
    list-style-type: none;
    padding: 0;
}

#transactionList li {
    background-color: #f9f9f9;
    padding: 0.5rem;
    margin-bottom: 0.5rem;
    border-radius: 3px;
}

.income {
    border-left: 5px solid #4CAF50;
}

.expense {
    border-left: 5px solid #f44336;
}