body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    scroll-behavior: smooth;
}
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
}
header {
    background: #333;
    color: white;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}
header h1 {
    display: inline-block;
    margin: 0;
}
nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    float: right;
}
nav ul li {
    margin-left: 15px;
}
nav ul li a {
    color: white;
    text-decoration: none;
}
.secao {
    padding: 60px 20px;
}
.secao.clara {
    background: #f4f4f4;
}
.destaque {
    background: #0077cc;
    color: white;
    text-align: center;
}
.btn {
    display: inline-block;
    padding: 10px 20px;
    background: #0077cc;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}
.btn-secundario {
    background: #555;
}
.rodape {
    background: #222;
    color: #ccc;
    text-align: center;
    padding: 20px;
}