body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

.hlavicka {
    background-color: lightblue;
    text-align: center;
    padding: 15px;
}

header {
    border: 2px solid black;
}

/* Nadpis Obsah */
body > h3 {
    background: linear-gradient(to right, #111, #222);
    color: white;
    text-align: center;
    margin: 0;
    padding: 15px 0 5px 0;
    font-size: 28px;
    letter-spacing: 2px;
}

/* Blok s odkazy */
nav {
    background: linear-gradient(to right, #111, #222);
    margin: 0;
    padding: 10px 20px 20px 20px;
    width: 100%;
    box-sizing: border-box;
    border-bottom: 2px solid black;
}

nav ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}

nav li {
    margin: 0;
}

nav a {
    display: block;
    background-color: #333;
    padding: 12px 20px;
    border-radius: 10px;
    text-decoration: none;
    color: white;
    font-weight: bold;
    transition: 0.3s;
    border: 1px solid #666;
}

nav a:hover {
    background-color: deepskyblue;
    transform: scale(1.05);
    color: black;
}

.uvod,
.Anotace {
    width: 80%;
    max-width: 900px;
    margin: 20px auto;
    border: 2px solid black;
    padding: 20px;
}

.uvod h3,
.Anotace h4 {
    text-align: center;
}

.uvod p,
.Anotace p {
    text-align: justify;
}

.klicova {
    text-align: center;
    font-style: italic;
}

.obrazek {
    display: block;
    margin: 20px auto;
    width: 80%;
    max-width: 600px;
    height: auto;
    border: 2px solid black;
}

table {
    width: 80%;
    margin: 20px auto;
    border-collapse: collapse;
}

th, td {
    border: 1px solid black;
    padding: 10px;
    text-align: center;
}

th {
    background-color: lightblue;
}

hr {
    width: 80%;
    max-width: 900px;
    margin: 0 auto;
}

.paticka {
    background-color: black;
    color: white;
    text-align: center;
    padding: 15px;
    border-top: 2px solid black;
    width: 100%;
    box-sizing: border-box;
}

footer {
    border: 2px solid black;
}