body {
    font-family: 'Arial', sans-serif;
    background-color: #f2f2f2;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 20px auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
}

form {
    display: flex;
    flex-direction: column;
}

.form-group {
    margin-bottom: 20px;
}

label {
    font-weight: bold;
    margin-bottom: 5px;
    color: #555;
}

input[type="text"],
input[type="date"],
input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
    margin-top: 5px;
}

input[type="number"] {
    appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

button {
    padding: 10px;
    background-color: #4CAF50;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    text-align: center;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #45a049;
}

h2 {
    margin-top: 30px;
    color: #333;
    border-bottom: 2px solid #4CAF50;
    padding-bottom: 5px;
}

.expenses {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}