* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    color: #222;
    background-color: #ffffff;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: auto;
}

.header {
    background: #0f172a;
    padding: 20px 0;
}

.header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    color: #ffffff;
    font-size: 24px;
    font-weight: bold;
}

.logo span {
    color: #38bdf8;
}

nav a {
    color: #ffffff;
    margin-left: 20px;
    text-decoration: none;
    font-size: 15px;
}

.hero {
    background: linear-gradient(120deg, #020617, #0f172a);
    color: #ffffff;
    padding: 90px 0;
    text-align: center;
}

.hero h1 {
    font-size: 40px;
    margin-bottom: 20px;
}

.section {
    padding: 70px 0;
}

.section h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 32px;
}

.bg-light {
    background: #f1f5f9;
}

.bg-dark {
    background: #020617;
    color: #ffffff;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.card {
    background: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.lista-cursos {
    list-style: none;
    max-width: 600px;
    margin: auto;
}

.lista-cursos li {
    background: #ffffff;
    margin-bottom: 15px;
    padding: 15px;
    border-left: 5px solid #38bdf8;
}

.form {
    max-width: 500px;
    margin: auto;
}

.form input,
.form textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: none;
    border-radius: 4px;
}

.btn {
    padding: 12px 25px;
    background: #38bdf8;
    color: #020617;
    border: none;
    text-decoration: none;
    cursor: pointer;
    font-weight: bold;
}

.btn-primary {
    background: #38bdf8;
}

.footer {
    background: #0f172a;
    color: #ffffff;
    text-align: center;
    padding: 20px 0;
    font-size: 14px;
}

@media(max-width:768px) {
    .hero h1 {
        font-size: 30px;
    }

    nav a {
        margin-left: 10px;
        font-size: 14px;
    }
}