body {
    font-family: Arial, sans-serif;
    background-color: #f8f8f8;
    margin: 20px;
    padding: 0;
    color: #333;
}

h1, h2, h3, h4 {
    color: #2c3e50;
    margin: 20px;
}

form {
    background-color: #ffffff;
    padding: 30px;
    margin: 20px;
    border-radius: 8px;
    width: 400px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

input[type="text"],
input[type="number"],
input[type="submit"],
input[type="checkbox"] {
    width: 100%;
    padding: 10px;
    margin: 8px 0 15px 0;
    border: 1px solid #ccc;
    border-radius: 4px;
}

input[type="submit"] {
    background-color: #27ae60;
    color: white;
    border: none;
    cursor: pointer;
    transition: background 0.3s;
}

input[type="submit"]:hover {
    background-color: #219150;
}

a {
    color: #2980b9;
    text-decoration: none;
    margin: 20px;
}

a:hover {
    text-decoration: underline;
}

table {
    border-collapse: collapse;
    width: 100%;
    margin-top: 20px;
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

th, td {
    text-align: left;
    padding: 12px;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #2c3e50;
    color: white;
}

ul {
    background: #fff;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.checkbox-group {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.checkbox-group input[type="checkbox"] {
    margin-right: 20px;
}
.checkbox-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px dashed #ccc;
}
.bill-box {
    padding: 20px;
    margin: 20px 0;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

/* Reset ul padding/margin */
.bill-box ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.bill-box li {
    padding: 8px 0;
    border-bottom: 1px dashed #ccc;
}