body {
    font-family: 'Montserrat', Arial, sans-serif;
    background: #F6F8FB;
    color: #222;
    margin: 0;
    padding: 0;
}
header, footer {
    background: #174EA6;
    color: #fff;
    padding: 1em 0;
}
header {
    position: sticky;
    top: 0;
    z-index: 99;
}
.logo {
    height: 44px;
}
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1150px;
    margin: 0 auto;
    padding: 0 1em;
}
nav ul {
    list-style: none;
    display: flex;
    gap: 2em;
    padding: 0;
    margin: 0;
}
nav ul li {
    display: inline;
}
nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}
nav ul li a:hover {
    color: #2B6CB0;
}
main {
    max-width: 900px;
    margin: 2em auto;
    padding: 0 1em;
}
.artigos-lista article {
    background: #fff;
    margin: 1.5em 0;
    border-radius: 8px;
    padding: 1.5em;
    box-shadow: 0 2px 8px #e3e8f0;
    transition: box-shadow .2s, transform .2s;
}
.artigos-lista article:hover {
    box-shadow: 0 6px 18px #e3e8f0;
    transform: translateY(-2px);
}
.artigos-lista h2 {
    margin: 0 0 8px 0;
}
.artigos-lista p {
    margin: 0 0 4px 0;
    color: #333;
}
footer {
    text-align: center;
}

.footer-links {
    margin: .8em 0 0 0;
}
.footer-links a {
    color: #fff;
    margin: 0 0.5em;
    text-decoration: none;
}
@media (max-width:600px) {
    nav ul {
        flex-direction: column;
        gap: .8em;
        background: #174EA6;
    }
    .logo {
        height: 36px;
    }
}