style.css

body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f4;
}

h1 {
    margin-top: 20px;
    color: #333;
}

form {
    margin: 20px 0;
}

input[type="text"] {
    padding: 10px;
    width: 250px;
    margin-right: 10px;
}

button {
    padding: 10px 15px;
    color: #fff;
    background-color: #5cb85c;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #4cae4c;
}

table {
    width: 80%;
    margin: 20px auto;
    border-collapse: collapse;
    background-color: #fff;
}

table, th, td {
    border: 1px solid #ddd;
}

th, td {
    padding: 10px;
    text-align: center;
}

th {
    background-color: #f2f2f2;
}

a {
    color: #333;
    text-decoration: none;
}

.plots img {
    width: 80%;
    margin: 20px 0;
}