body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333;
    line-height: 1.6;
}
header {
    background-color: #003366; /* Deep Blue */
    color: white;
    padding: 20px 0;
    text-align: center;
}
main {
    max-width: 900px;
    margin: 20px auto;
    padding: 20px;
    background-color: white;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 8px;
}
section {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}
th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}
th {
    background-color: #e6e6e6;
    font-weight: bold;
}
button {
    background-color: #007bff;
    color: white;
    padding: 10px 15px;
    border: none;
    cursor: pointer;
    border-radius: 4px;
    margin-top: 10px;
    transition: background-color 0.3s;
}
button:hover:enabled {
    background-color: #0056b3;
}
button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}
#lookup-data input[type="date"] {
    padding: 8px;
    margin-right: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}
footer {
    text-align: center;
    padding: 10px;
    margin-top: 20px;
    font-size: 0.8em;
    color: #777;
}