body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
header {
    background-color: #0077b6;
    color: white;
    text-align: center;
    padding: 20px;
    font-size: 24px;
    width: 100%;
}
nav {
    width: 100%;
    background-color: #005f99;
    text-align: center;
    position: relative;
}
.menu-toggle {
    display: none;
    background-color: #005f99;
    color: white;
    border: none;
    padding: 12px;
    font-size: 18px;
    width: 100%;
    cursor: pointer;
}
.nav-menu {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: space-around;
    margin: 0;
}
.nav-menu li {
    padding: 15px;
}
.nav-menu li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    font-size: 16px;
}
.nav-menu li a:hover {
    color: #ffcc00;
}
main {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    width: 100%;
    max-width: 900px;
}
.section {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 90%;
    margin-bottom: 20px;
}
.section img {
    width: 100%;
    max-width: 400px;
    border-radius: 10px;
}
.button {
    display: inline-block;
    padding: 10px 20px;
    background-color: #0077b6;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 10px;
}
.button:hover {
    background-color: #005f99;
}
footer {
    background-color: #0077b6;
    color: white;
    text-align: center;
    padding: 15px;
    width: 100%;
    margin-top: 20px;
}
@media screen and (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    .nav-menu {
        flex-direction: column;
        display: none;
        background-color: #0077b6;
    }
    .nav-menu.active {
        display: flex;
    }
    .nav-menu li {
        text-align: center;
        width: 100%;
        padding: 10px 0;
    }
    .section {
        width: 95%;
    }
    .section img {
        max-width: 250px;
    }
    header {
        font-size: 20px;
    }
}