.p_inline {
    display: inline;
}

.error {
    display: block;
    text-align: center;
}

.success {
    display: block;
    text-align: center;

}

th, td {
    border: 1px solid black;
    padding: 8px;
}

body {
    font-family: Arial, sans-serif;
    margin: auto;
    padding: 0;
    line-height: 1.6;
    color: #333;
}

header {
    background-color: #f4f4f4;
    text-align: center;
    padding: 20px 0;
    margin-bottom: 20px;
}

h1 {
    margin: 0;
    color: #333;
    text-align: center;
}

nav {
    background-color: #333;
    margin-bottom: 20px;
    display: flex;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: space-evenly;
    flex-grow: 1;
    flex-direction: column-reverse;
    align-items: center;
}

nav li {
    padding: 0;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 15px 20px;
    display: block;
    transition: background-color 0.3s ease;
}

nav a:hover {
    background-color: #555;
}

main {
    padding: 20px;
    background-color: #f9f9f9;
    margin-bottom: 20px;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #f4f4f4;
    color: #666;
    font-size: 0.8em;
    position: sticky;
    bottom: 10px;
}