/* Globální nastavení */
body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(180deg, #001f3f 0%, #0052cc 100%);
    color: #ffffff;
    text-align: center;
}

/* Hlavička */
header {
    background-color: #001f3f;
    color: white;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header .logo {
    font-size: 22px;
    font-weight: bold;
}

/* Navigace */
nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 20px;
}
nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 600;
}
nav ul li a:hover {
    text-decoration: underline;
}

/* Hero sekce (prostředek stránky) */
.hero {
    padding: 100px 20px;
}
.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}
.hero p {
    font-size: 20px;
    margin-bottom: 30px;
}

/* Tlačítka */
.button, .btn, input[type="submit"] {
    background-color: #1e90ff;
    color: #fff;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    text-decoration: none;
}
.button:hover, .btn:hover, input[type="submit"]:hover {
    background-color: #0052cc;
}

/* Flash zpráva */
.flash-message {
    background:#d4edda;
    color:#155724;
    padding:10px;
    margin:20px auto;
    width:80%;
    text-align:center;
    border:1px solid #c3e6cb;
    border-radius:5px;
}