body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f8f9fa;
    color: #212529;
}
header {
    background: linear-gradient(90deg, #4CAF50, #66BB6A);
    color: white;
    padding: 2em 0;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    background-color: #343a40;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
nav ul li {
    margin: 0;
    border-radius: 15px;
}
nav ul li a {
    color: white;
    text-decoration: none;
    padding: 1em 2em;
    display: block;
}

main {
    padding: 2em;
    max-width: 800px;
    margin: auto;
    background: white;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1em;
}
table, th, td {
    border: 1px solid #dee2e6;
}
th, td {
    padding: 0.75em;
    text-align: left;
}
th {
    background-color: #f1f3f5;
}
form label {
    font-weight: bold;
}
form input, form textarea {
    width: 100%;
    padding: 0.75em;
    margin-top: 0.5em;
    margin-bottom: 1em;
    border: 1px solid #ced4da;
    border-radius: 4px;
}
form button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 0.75em 1.5em;
    border-radius: 4px;
    cursor: pointer;
}
form button:hover {
    background-color: #45a049;
}
nav ul li:hover{
    background-color:dimgray;
    transition-duration: 0.8s;
}
tr:hover{
    background-color: #ced4da;
    transition-duration: 0.2s;
}