body {
    font-family: 'Segoe UI', sans-serif;
    background: #f4f4f9;
    margin: 0;
    padding: 0;
}
.container {
    width: 90%;
    margin: auto;
    padding: 20px;
}
h2, h3 {
    color: #333;
}
form input, form button {
    padding: 10px;
    margin: 5px;
}
form input {
    width: 200px;
}
form button {
    background: #007bff;
    color: white;
    border: none;
}
table {
    width: 100%;
    margin-top: 10px;
    border-collapse: collapse;
}
table, th, td {
    border: 1px solid #ddd;
}
th, td {
    padding: 8px;
}
.tab {
    background: white;
    border-radius: 5px;
    padding: 10px;
    margin-top: 15px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
button {
    cursor: pointer;
}
a {
    color: #007bff;
    text-decoration: none;
}