.alaska-theme {
    background: url('486.jpg') no-repeat center center fixed;
    background-size: cover;
}

header {
    text-align: center;
    padding: 30px 0;
    background: rgba(255, 255, 255, 0.7);
}

nav ul {
    list-style: none;
    padding-left: 0;
}

nav ul li {
    display: inline;
    margin-right: 20px;
}

nav ul li a {
    text-decoration: none;
    font-weight: bold;
    color: #3a3a3a;
}

nav ul li a:hover {
    color: #1a5c8a;
}

.introduction {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: rgba(255, 255, 255, 0.7);
}

.profile-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin-right: 30px;
}

.description h2 {
    margin: 0;
}

.goals {
    text-align: center;
    padding: 30px;
    background: rgba(255, 255, 255, 0.7);
}

footer {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.7);
}