* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Header */
.header {
    background-color: #222;
    color: #fff;
    padding: 15px;
    text-align: center;
}

/* Layout */
.container {
    display: flex;
    min-height: calc(100vh - 120px);
}

/* Sidebar */
.sidebar {
    width: 200px;
    background-color: #f4f4f4;
    padding: 20px;
}

.sidebar ul {
    list-style: none;
}

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

.sidebar a {
    text-decoration: none;
    color: #333;
}

/* Content */
.content {
    flex: 1;
    padding: 20px;
}

/* Footer */
.footer {
    background-color: #222;
    color: #fff;
    text-align: center;
    padding: 10px;
}

#ul_menu {
    list-style: none;
    padding: 0;
}

#ul_menu > li {
    position: relative;
    margin-bottom: 5px;
	background-color: blue;
    color: #fff; 
}

.submenu {
    list-style: none;
    padding-left: 15px;ul_
}