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

body {
    background-color: #f4f6f8;
    color: #333;
}

header {
    background-color: #0d6efd;
    color: white;
    padding: 25px;
    margin-bottom: 20px;
}

header img {
    margin-top: 10px;
    border-radius: 50%;
    border: 3px solid white;
}

header h1 {
    text-transform: uppercase;
    letter-spacing: 2px;
}

header h2 {
    font-size: 18px;
    font-weight: normal;
}

main {
    width: 90%;
    max-width: 1100px;
    margin: auto;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
    padding: 20px;
}

nav {
    background-color: #212529;
    border-radius: 8px;
    margin-bottom: 25px;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

nav li {
    margin: 10px;
}

nav a {
    text-decoration: none;
    color: white;
    padding: 10px 18px;
    border-radius: 5px;
    transition: 0.3s;
    font-weight: bold;
}

nav a:hover {
    background-color: #0d6efd;
}

section {
    text-align: center;
    padding: 20px;
}

section h2 {
    margin-bottom: 15px;
    color: #0d6efd;
}

section p {
    font-size: 16px;
    line-height: 1.6;
}

footer {
    margin-top: 30px;
    padding: 15px;
    background-color: #212529;
    color: white;
    border-radius: 8px;
    font-size: 14px;
}

@media (max-width: 600px) {

    nav ul {
        flex-direction: column;
    }

    header h1 {
        font-size: 22px;
    }

    header h2 {
        font-size: 16px;
    }
}