body {
    margin: 0;
    font-family: sans-serif;
    background: #f0f8ff;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #3498db;
    color: #fff;
    padding: 10px 16px;
}

.logo {
    height: 30px;
}

.menu-icon {
    font-size: 24px;
    cursor: pointer;
}

.sidebar {
    position: fixed;
    top: 0;
    left: -250px;
    width: 220px;
    height: 100%;
    background: #2c3e50;
    color: #fff;
    transition: left 0.3s;
    padding: 16px;
    z-index: 1001;
}

.sidebar.show {
    left: 0;
}

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

.sidebar ul li {
    margin: 12px 0;
}

.sidebar ul li a {
    color: white;
    text-decoration: none;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1000;
    display: none;
}

.overlay.active {
    display: block;
}

.main-content {
    padding: 20px;
}

.menu-section .back-button {
    display: inline-block;
    margin-bottom: 16px;
    color: #2980b9;
    text-decoration: none;
}

.section-title {
    font-size: 22px;
    margin-bottom: 10px;
}

.content-box {
    background: white;
    padding: 16px;
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.footer-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    display: flex;
    justify-content: space-around;
    background: #3498db;
    color: white;
    width: 100%;
    padding: 10px 0;
}

.footer-nav .nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 12px;
}

.footer-nav .nav-item img {
    width: 20px;
    height: 20px;
}