* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    padding: 20px;
}

nav {
    margin-bottom: 20px;
}

nav a {
    margin-right: 15px;
    text-decoration: none;
    color: #333;
}

nav a:hover {
    text-decoration: underline;
}

form {
    margin-bottom: 20px;
}

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

form button {
    padding: 5px 15px;
    cursor: pointer;
}

ul {
    list-style: none;
}

ul li {
    padding: 5px 0;
}

.flash {
    background-color: #f8d7da;
    color: #721c24;
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 4px;
}

nav span {
    margin-right: 15px;
    font-weight: bold;
}

form div {
    margin-bottom: 10px;
}

.error {
    color: #dc3545;
    font-size: 0.9em;
    margin-top: 5px;
}