body {
    font-family: Arial, sans-serif;
    margin: 20px;
    line-height: 1.5;
}

h1, h2 {
    margin-bottom: 10px;
}

nav {
    margin-bottom: 15px;
}

nav a {
    margin-right: 12px;
    text-decoration: none;
    color: blue;
    font-weight: bold;
}

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

main {
    margin-top: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
    margin-bottom: 20px;
}

th,
td {
    border: 1px solid #ccc;
    padding: 10px;
    text-align: left;
}

th {
    background-color: #f2f2f2;
}

/* https://www.geeksforgeeks.org/css-nth-child-pseudo-class/ */
tr:nth-child(even) {
    background-color: #fafafa;
}

ul {
    padding-left: 20px;
}

button {
    padding: 8px 14px;
    cursor: pointer;
}

.message-list {
    list-style: none;
    padding: 0;
    margin: 0 0 20px 0;
}

.message-list li {
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #cce5cc;
    background-color: #eaf7ea;
}

nav a {
    text-decoration: none;
    margin-right: 10px;
}

/* Active page */
nav a.active {
    border-bottom: 2px solid blue;
}

.logout-form {
    display: inline-flex;
    align-items: center;
    margin: 0;
    padding: 0;
}

.logout-form button {
    appearance: none;
    background: transparent;
    border: 0;
    color: blue;
    cursor: pointer;
    font: inherit;
    font-weight: bold;
    margin: 0;
    padding: 0;
}

.logout-form button:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    body {
        font-size: 18px;
    }

    h1 {
        font-size: 26px;
    }

    h2 {
        font-size: 22px;
    }

    nav {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    nav a.active {
        border-bottom: 1px solid #ccc;
        width: auto;
        display: inline-block;
    }

    nav a,
    .logout-form button {
        display: block;
        width: 100%;
        padding: 6px 0;
    }

    
}