body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow-x: hidden;
}

/* Sidebar Styling */
#sidebar-wrapper {
    min-height: 100vh;
    width: 250px;
    margin-left: -250px;
    transition: margin .25s ease-out;
    background: #2c3e50;
    color: white;
}

#sidebar-wrapper .sidebar-heading {
    padding: 1.5rem 1.25rem;
    font-size: 1.2rem;
    font-weight: bold;
    border-bottom: 1px solid #455a64;
}

#sidebar-wrapper .list-group-item {
    background-color: transparent;
    color: #bdc3c7;
    border: none;
    padding: 1rem 1.5rem;
}

#sidebar-wrapper .list-group-item:hover {
    background-color: #34495e;
    color: white;
}

/* Hero Wallpaper Section */
.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), 
                url('https://images.unsplash.com/photo-1521737711867-e3b97375f902?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    border-radius: 0 0 20px 20px;
}

#wrapper.toggled #sidebar-wrapper {
    margin-left: 0;
}

@media (min-width: 768px) {
    #sidebar-wrapper { margin-left: 0; }
    #wrapper.toggled #sidebar-wrapper { margin-left: -250px; }
}