html {
    font-family: Arial;
    font-size: 16px;
}
.container {
    width: 1000px;
}
@media (max-width: 1000px) {
    .container {
        padding: 0 5%;
    }
}
h1, h2, h3, h4, h5, h6 {
    font-family: "Kaushan Script";
}

#nahoru {
    position: fixed;
    right: 20px;
    bottom: 20px;
	width: 50px;
    height: 50px;
	font-size: 40px;
    background: #c4bdbd;
	color: white;
    display: flex;
    justify-content: center;
    align-items: center;
	border-radius: 10px;
	cursor: pointer;
	opacity: 0;
	transition: opacity 1s linear;
}

#nahoru.zobrazit {
    opacity: 1;
}