header {
    background-color: #f60;
    justify-content: space-between;
    padding: 15px 30px;
    color: #fff;
    box-shadow: 0 4px 8px rgba(0,0,0,.2);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
}

header .logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

header .logo img {
    width: 50px;
    height: 50px;
}

header .logo h1 {
    font-size: 28px;
    font-weight: 900;
    text-shadow: 1px 1px 3px rgba(0,0,0,.3);
}

header nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 25px;
    font-weight: 700;
    transition: opacity .2s, transform .2s;
}

header nav a:hover {
    opacity: .9;
    transform: scale(1.05);
}