body {
    background-color: rgb(245, 245, 245);
}

header {
    background-color: rgba(245, 245, 245, 0.5);
    color: #000000;
    padding: 20px 40px; 
    position: fixed;
    top: 0; 
    left: 0;
    width: 100%;
    z-index: 1000;
}

.menu {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.menu li {
    display: inline-block;
    margin-right: 10px;
}

.menu a {
    font-family: system-ui;
    text-decoration: none;
    color: #000000;
    padding: 13px;
    transition: background-color 0.3s ease; 
}

.menu a:hover {
    background-color: #D6D6D6;
}

.menu a:focus {
    outline: 2px solid #D6D6D6; 
}

h2 {
    font-family: system-ui;
}
img {
    display: block;
    margin: auto;
    max-width: 70%;
}