body {
    font-family: Arial;
    margin: 0;
}

header {
    background: #111;
    color: white;
    padding: 15px;
}

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

.hero {
    text-align: center;
    padding: 80px;
    background: linear-gradient(#000, #444);
    color: white;
}

.btn {
    background: #ff6600;
    padding: 10px 20px;
    color: white;
    text-decoration: none;
}

.cursos {
    display: flex;
    flex-wrap: wrap;
}

.card {
    background: #eee;
    padding: 20px;
    margin: 10px;
    flex: 1;
}

form {
    display: flex;
    flex-direction: column;
    width: 300px;
    margin: auto;
}

input, select, button {
    margin: 10px 0;
    padding: 10px;
}