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

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: #f8f8f8;
}

.logo {
    font-weight: bold;
    font-size: 20px;
}

.search {
    flex: 1;
    margin: 0 20px;
    padding: 5px 10px;
}

.profile {
    font-size: 20px;
}

.sub-menu {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 10px 0;
    background-color: #f8f8f8;
}

.sub-link {
    text-decoration: none;
    color: black;
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 4px;
}

.sub-link:hover {
    background-color: #e0e0e0;
}

.main {
    display: flex;
}

.sidebar {
    width: 220px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.sidebar-section {
    background-color: #f0f0f0;
    padding: 10px;
    border-radius: 8px;
}

.section-title {
    font-weight: bold;
    margin: 0 0 5px 0;
}

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

.sidebar li {
    margin-bottom: 8px;
}

.menu-link {
    text-decoration: none;
    color: black;
    display: block;
    padding: 5px 5px;
}

.menu-link:hover {
    background-color: #dddddd;
    border-radius: 4px;
}

.videos {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px;
    flex: 1;
}

.video {
    width: calc(50% - 10px);
    height: 150px;
    background-color: #cccccc;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}