body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 100%;
    line-height: 1.6;
    margin: 0;
    background-color: #fff;
    color: #222;
}

header, footer, nav, main, section, article, aside {
    padding: 1em;
}

h1 {
    background-image: url('images/bg.jpg')
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    background-color: #333;
}

nav ul li {
    margin: 0;
}

nav ul li a {
    display: block;
    padding: 0.75em 1em;
    color: white;
    text-decoration: none;
}

nav ul li a:hover,
nav ul li a.active {
    background-color: #555;
}

.skip-link {
    position: absolute;
    left: -10000px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.skip-link:focus {
    position: static;
    width: auto;
    height: auto;
}

img.responsive {
    max-width: 100%;
    height: auto;
}

img.thumbnail {
    width: 150px;
    height: auto;
    border: 1px solid #ccc;
}

button {
    margin: 0.5em 0;
    padding: 0.5em 1em;
    cursor: pointer;
}

/* Kontraszt mód */
body.high-contrast {
    background-color: black;
    color: yellow;
}

.high-contrast a {
    color: lightgreen;
    text-decoration: underline;
}