* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background: #f8f8f8;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: rgb(22, 62, 80);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    border-bottom: 1px solid #000;
}

footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: rgb(22, 62, 80);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    border-top: 1px solid #000;
    padding: 0 20px;
}

.sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    bottom: 40px;
    width: 250px;
    background: #fff;
    border-right: 1px solid #ddd;
    padding: 20px;
    overflow-y: auto;
}

.sidebar nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar nav ul li {
    margin-bottom: 10px;
}

.sidebar nav ul li a {
    text-decoration: none;
    color: #333;
    transition: color 0.2s ease;
}

.sidebar nav ul li a:hover {
    color: rgb(22, 62, 80);
    font-weight: bold;
}

.sidebar nav ul li ul {
    margin-top: 5px;
    margin-left: 15px;
    padding-left: 10px;
    border-left: 2px solid rgb(22, 62, 80);
    font-size: 0.9em;
}

.sidebar nav ul li ul li {
    margin-bottom: 5px;
}

.sidebar nav ul li ul li::before {
    content: "?"; /* Nyíl karakter */
    color: rgb(22, 62, 80);
    margin-right: 5px;
}

.main-content {
    margin-left: 250px;
    margin-top: 60px;
    margin-bottom: 40px;
    padding: 20px;
    overflow-y: auto;
    height: calc(100vh - 60px - 40px);
}

section {
    margin-bottom: 40px;
}

section h2 {
    border-bottom: 2px solid #ddd;
    padding-bottom: 10px;
    color: rgb(22, 62, 80);
}

section h3 {
    color: #555;
    margin-top: 20px;
}

ul {
    margin: 10px 0 10px 20px;
    padding-left: 20px;
}

ul li {
    margin-bottom: 10px;
}

img,
video {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    margin: 0 auto 40px;
    display: block;
}

.separator {
    border-top: 2px solid #ddd;
    margin: 40px 0;
}

.highlight {
    color: rgb(22, 62, 80);
}

.video-container {
    margin-top: 40px; /* Növelje a távolságot itt */
}

@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }

    .main-content {
        margin-left: 200px;
        height: calc(100vh - 60px - 40px);
    }
}