:root {
    --primary-color: #00204a; /* Dark Blue */
    --accent-color: #00bbf0; /* Cyan */
    --bg-color: #f4f6f9;
    --text-color: #333;
    --sidebar-width: 250px;
}

body.sidebar-layout {
    font-family: 'Roboto', sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    overflow-x: hidden;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--primary-color);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    color: #fff;
    transition: all 0.3s;
    z-index: 1000;
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px;
    background-color: rgba(0,0,0,0.2);
    text-align: center;
}

.sidebar-header h4 {
    margin: 0;
    font-weight: 700;
    font-size: 1.2rem;
    color: #fff;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 20px 0 0 0;
}

.sidebar-menu li {
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.sidebar-menu a {
    display: block;
    padding: 15px 20px;
    color: #bdc3c7;
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar-menu a:hover, .sidebar-menu a.active {
    color: #fff;
    background-color: var(--accent-color);
    padding-left: 25px;
}

.sidebar-menu i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    transition: all 0.3s;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}


/* Topbar */
.topbar {
    background-color: #fff;
    padding: 10px 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 999;
}

.toggle-btn {
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
    display: none; /* Hidden on desktop */
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.toggle-btn i {
    font-size: 1.5rem;
    color: var(--primary-color);
    line-height: 1;
}

.toggle-btn:hover {
    background-color: rgba(0, 32, 74, 0.05);
}

.user-profile {
    display: flex;
    align-items: center;
}

.user-profile img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: 10px;
    object-fit: cover;
    border: 2px solid var(--accent-color);
}

/* Reuse existing header for brand if needed, or hide it */
.header_section {
    background-color: #fff; 
}

/* Adjust dashboard section padding since it's now inside main content */
.dashboard_section {
    padding: 30px 0;
    flex: 1; /* Push footer down */
}

/* Responsive */
@media (max-width: 991px) {
    .sidebar {
        margin-left: calc(var(--sidebar-width) * -1);
    }
    .sidebar.active {
        margin-left: 0;
    }
    .main-content {
        margin-left: 0;
    }
    .toggle-btn {
        display: flex !important;
        align-items: center;
        justify-content: center;
        width: 45px;
        height: 45px;
        background-color: transparent !important;
        border: none;
        cursor: pointer;
        z-index: 1001;
        position: relative;
    }
    
    .toggle-btn i {
        color: #00204a !important;
        font-family: 'FontAwesome' !important;
        font-size: 24px !important;
        width: auto;
        height: auto;
        line-height: 1;
        visibility: visible;
    }

    /* Overlay when sidebar is active on mobile */
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0,0,0,0.5);
        z-index: 998;
        display: none;
    }
    .sidebar-overlay.active {
        display: block;
    }
    
    .topbar h4 {
        font-size: 1.2rem; /* Reduce font size on mobile */
    }
}