body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f7f7f7;
}

header {
    background-color: #444;
    color: #fff;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    margin: 0;
    font-size: 1.5em;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

main {
    padding: 20px;
}

.form-section {
    margin-bottom: 20px;
    background-color: #fff;
    padding: 15px;
    border-radius: 5px;
}

.form-group input {
    margin: 5px;
    padding: 10px;
}

.btn-add {
    background-color: green;
    color: white;
    padding: 10px 15px;
    border: none;
    cursor: pointer;
    margin-left: 5px;
}

.file-upload {
    margin-top: 10px;
}

.btn-import {
    background-color: blue;
    color: white;
    padding: 8px 12px;
    border: none;
    cursor: pointer;
    margin-left: 10px;
}

.table-section table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
}

.table-section th,
.table-section td {
    padding: 10px;
    border: 1px solid #ddd;
    text-align: left;
}

.table-section th {
    background-color: #cce0ff;
}