header {
    margin-bottom: 80px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

section {
    margin-bottom: 80px;
    transition: border-color 0.3s ease;
}

footer {
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
}

footer a {
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

footer a:hover {
    border-bottom-color: var(--text-secondary);
}