body {
    font-family: Arial, sans-serif;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

section {
    border: 1px solid #ccc;
    padding: 20px;
    border-radius: 5px;
}

h1, h2 {
    color: #333;
}

input, select, button {
    margin: 5px;
    padding: 8px;
    font-size: 16px;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 3px;
}

button:hover {
    background-color: #0056b3;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th, td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: left;
}

th {
    background-color: #f2f2f2;
}

#uploadResult, #searchResult, #updateResult {
    margin-top: 10px;
    padding: 10px;
    border-radius: 3px;
}

#updateForm {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

#updateForm button {
    grid-column: span 3;
}

#searchResult table {
    font-size: 14px;
}

#uploadResult.success, #updateResult.success {
    background-color: #d4edda;
    color: #155724;
}

#uploadResult.error, #updateResult.error {
    background-color: #f8d7da;
    color: #721c24;
}

#searchResult:empty {
    display: none;
}