Responzivní design

@media screen and (max-width: 480px) {
    body { width: 100%; height: 100%;}
    h1 { width: 100%;    height: 100%;}
    h2 { width: 100%;    height: 100%;}
    h3 { width: 100%;    height: 100%;}
    img { width: 100%;    height: 100%;}
    iframe { width: 100%;    height: 100%;}
    div.Obsah { width: 100%; height: 100%;}
    div.Header { width: 100%; height: 100%;}
    div.Tabulka { width: 100%; height: 100%;}
    .Obrazek { width: 100%;    height: 100%;}
    .Nazev { width: 100%;    height: 100%;}
    .Navigace { width: 100%;    height: 100%;}
    .KulatyObazek { width: 100%;    height: 100%;}
    nav { width: 100%;    height: 100%;}
    a { width: 100%; height: 100%;}
    ul li { width: 100%; height: 100%;}
    ol li { width: 100%; height: 100%;}

}

* {
    box-sizing: border-box;
}

body {
    background-color: rgb(242, 214, 224); 
    display: block;
    margin : 0; 
    line-height: 100%; /*výška řádku*/
    padding: 5% 10% 5% 10%;        
}

div.obsah {
    width: 90%;
    margin: auto; 
    background-color: white;
    border-radius: 15px; /*zakulacené rohy*/
    border: solid 2px;
    box-shadow: 10px 10px 5px #888888; /*stín*/
    border-radius: 15px;

}

div.header {
    width: 90%;
    margin:auto;
    padding: 1em; /*šířka vnitřního okraje*/
    background-color: white;
    text-align: center;  
    margin-top: 10px;
    margin-bottom: 10px;
    border-radius: 15px;
    border: solid 2px; /*ohraničení*/
    box-shadow: 10px 5px #888888; /*stín*/
}

h1 {
    color: black;
    text-align:    center;
    font-family: "Times New Roman", Times, serif ;
    font-style: italic;
    font-size: 300%;
    letter-spacing: .2em; /*mezery mezi písmeny*/
        
}

h2 {
    text-align: center;
    font-family: "Times New Roman", Times, serif;
    font-style: italic;
    font-size: 200%;
    letter-spacing: .2em;
}

h3 {
    text-align: center;
    font-family: "Times New Roman", Times, serif;
    font-style: italic;
    font-size: 150%;
    letter-spacing: .2em;
}

p {
    text-align: center;
    font-family: "Times New Roman", Times, serif;
    font-size:    large;    
}

img {
    display: block; /*způsob zobrazení*/ 
    margin-left: auto; /*šířka vnějšího okraje*/
    margin-right: auto;    
}

nav{
    text-align:center;
    max-width: 100%;
    margin: 0;  

}

a {
    text-decoration: none;
    color: black;
    text-align: center;
    font-weight: bold; /*tučně*/        
}

.Odkaz    {
    text-decoration:underline;
    font-weight: bold;    
}

ul li{
    text-align: center;
    list-style:    none; /*bez odrážek*/
    font-size: large;
    font-weight: bold;
}
ol li{
    text-align: center;
}
hr {
    color: black;
    
}

.KulatyObrazek {
    border-radius: 50%; /*poloměr zakulácení rohů*/
    height: 300px;
    width: 350px;
}
.Navigace {
    text-decoration: none;
    color: black;
    text-align: center;
    font-weight: bold;
    background-color: rgb(242, 214, 224);
    display: inline-block;
    padding: .2em;
    width: 15%;
    line-height: 35px;    
    border: 2px solid;
    border-radius: 12px;
    -webkit-border-radius: 12px;
    -moz-border-radius: 12px;
    margin: auto;
   
}
.Nazev {
    font-family: "Times New Roman", Times, serif;
    font-size: xx-large;
    font-weight: normal;
    font-style: italic;    
}
.Obrazek {
    float:    none;
    clear: both;
    clip: rect(auto, 100px, auto, auto);
    position: relative;
}
div.Text {
    border-radius: 50px;
    width: 300px;
    padding: 25px;
    margin: 25px;
    clear: both;
}
footer {
    padding: 1em;
    color: black;
    background-color: white;
    clear: left;
    text-align: center;
    border-radius: 15px;

}
iframe {
    display: block;  
    margin-left: auto;
    margin-right: auto;
    overflow: hidden;
    
}
div.Tabulka {
    width: 400px;
    padding: 25px;
    margin: 25px;
    border: 1px solid black;
    text-align:center;
    margin-left: auto;
    margin-right: auto;
}