* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #00bfff;
    color: #333;
}

nav {
    background-color: #222;
    padding: 15px;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 30px;
}

nav a {
    color: white;
    text-decoration: none;
    font-size: 18px;
    transition: 0.3s;
}

nav a:hover {
    color: #00bfff;
}

header {
    text-align: center;
    padding: 60px 20px;
    background: linear-gradient(to right, #112f45, #00bfff);
    color: white;
}

section {
    max-width: 900px;
    margin: 40px auto;
    background:rgb(255, 255, 255);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1, h2 { margin-bottom:20px; }

h3{margin-bottom: 20px;}

h4{margin-bottom: 15px;
font-size: 20px;}

p, li {
    line-height: 1.7;
    font-size: 18px;
    margin-bottom: 30px;
}

ul {
    margin-left: 25px;
}

img {align-items: center;}
.obrazok  {display: block;
margin-left: auto;
margin-bottom: 20px;
margin-right: auto;
}

.container{
    display: flex;
    justify-content: center;
    gap: "40px";
}

.container img{
    width: 250px; }

.video{display: block;
margin: auto;
width:auto;}

footer {
    text-align: center;
    padding: 20px;
    background-color: #222;
    color: white;
    margin-top: 40px;
}