* { margin:0; padding:0; box-sizing:border-box; }
body { 
    padding-top:0;
    padding-bottom:50px; 
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
    background:#f5f6fa;
}



/* ===== SIDEBAR ===== */
.sidebar {
    position:fixed;
    top:0;
    bottom:50px;
    left:0;
    width:260px;
    background:#1e1e2f;
    overflow-y:auto;
    overflow-x:hidden;
    transition:all .3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow:2px 0 10px rgba(0,0,0,0.1);
    z-index:1000;
}
.sidebar.collapsed { width:70px; }



/* Sidebar Header with Logo */
.sidebar-header {
    padding:20px;
    background:#2c3e50;
    display:flex;
    align-items:center;
    justify-content:space-between;
    border-bottom:1px solid rgba(255,255,255,0.1);
    height:70px;
}
.sidebar-logo {
    display:flex;
    align-items:center;
    color:#fff;
    font-size:22px;
    font-weight:700;
    letter-spacing:1px;
    text-decoration:none;
    transition:opacity .3s;
}
.sidebar-logo:hover {
    opacity:0.9;
}
.sidebar-toggle-btn {
    background:transparent;
    border:none;
    color:#fff;
    font-size:20px;
    cursor:pointer;
    padding:8px;
    border-radius:4px;
    transition:background .2s;
    display:flex;
    align-items:center;
    justify-content:center;
}
.sidebar-toggle-btn:hover {
    background:rgba(255,255,255,0.1);
}
.sidebar.collapsed .sidebar-logo span {
    display:none;
}
.sidebar.collapsed .sidebar-header {
    justify-content:center;
    padding:20px 10px;
}
.sidebar.collapsed .sidebar-toggle-btn {
    margin:0 auto;
}

/* Top Notification Bar */
.top-notification-bar {
    position:fixed;
    top:0;
    left:260px;
    right:0;
    height:70px;
    background:transparent;
    display:flex;
    align-items:center;
    justify-content:flex-end;
    padding:0 30px;
    z-index:999;
    transition:left .3s cubic-bezier(0.4, 0, 0.2, 1);
}
.sidebar.collapsed ~ .top-notification-bar {
    left:70px;
}



/* Notification badge */
.notification-link {
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:45px;
    height:45px;
    color:#2c3e50;
    text-decoration:none;
    border-radius:50%;
    transition:all .2s;
    position:relative;
    background:rgba(255,255,255,0.8);
    backdrop-filter:blur(10px);
}
.notification-link:hover {
    background:rgba(255,255,255,0.95);
    transform:scale(1.05);
}
.notification-link .glyphicon {
    font-size:20px;
}
.notification-badge {
    position:absolute;
    top:-2px;
    right:-2px;
    background:#ff4757;
    color:#fff;
    border-radius:10px;
    padding:2px 6px;
    font-size:10px;
    font-weight:600;
    min-width:18px;
    text-align:center;
}

/* User Profile Section in Sidebar */
.sidebar-profile {
    padding:20px;
    text-align:center;
    border-bottom:1px solid rgba(255,255,255,0.1);
    margin-bottom:10px;
}
.sidebar-profile .profile-name {
    color:#fff;
    font-size:16px;
    font-weight:600;
    margin-bottom:6px;
}
.sidebar-profile .profile-role {
    color:#aeb3c2;
    font-size:13px;
}
.sidebar.collapsed .sidebar-profile .profile-name,
.sidebar.collapsed .sidebar-profile .profile-role {
    display:none;
}
.sidebar.collapsed .sidebar-profile {
    padding:15px 10px;
}

/* Custom scrollbar */
.sidebar::-webkit-scrollbar { width:6px; }
.sidebar::-webkit-scrollbar-track { background:#1e1e2f; }
.sidebar::-webkit-scrollbar-thumb { background:#3a3a52; border-radius:3px; }
.sidebar::-webkit-scrollbar-thumb:hover { background:#4a4a62; }

/* ===== MENU ===== */
.sidebar .nav { margin-top:10px; }
.sidebar .nav>li {
    position:relative;
    margin:4px 8px;
}
.sidebar .nav>li>a {
    color:#cfd2dc;
    padding:14px 16px;
    display:flex;
    align-items:center;
    border-radius:8px;
    transition:all .3s ease;
    text-decoration:none;
    white-space:nowrap;
}
.sidebar .nav>li>a i {
    width:20px;
    font-size:18px;
    text-align:center;
    margin-right:12px;
    transition:transform .2s;
}
.sidebar .nav>li>a:hover {
    background:rgba(102,126,234,0.15);
    color:#fff;
    transform:translateX(4px);
}
.sidebar .nav>li>a:hover i {
    transform:scale(1.1);
}
.sidebar .nav>li.active>a {
    background:#667eea;
    color:#fff;
    box-shadow:0 4px 12px rgba(102,126,234,0.3);
}

/* Improved styling for parent items with submenus */
.sidebar .nav>li.has-sub>a {
    position:relative;
}
.sidebar .nav>li.has-sub>a::after {
    content:'›';
    position:absolute;
    right:16px;
    font-size:20px;
    transition:transform .3s ease;
    color:#aeb3c2;
}
.sidebar .nav>li.has-sub.open>a {
    background:rgba(102,126,234,0.2);
    color:#fff;
}
.sidebar .nav>li.has-sub.open>a::after {
    transform:rotate(90deg);
    color:#667eea;
}

/* ===== SUBMENU ===== */
.submenu { 
    display:none;
    background:rgba(255,255,255,0.05);
    margin:8px 0 8px 0;
    border-radius:8px;
    overflow:hidden;
    backdrop-filter:blur(10px);
    border:1px solid rgba(255,255,255,0.08);
}
.nav>li.open>.submenu { 
    display:block;
    animation:slideDown .3s ease;
}

@keyframes slideDown {
    from {
        opacity:0;
        transform:translateY(-10px);
    }
    to {
        opacity:1;
        transform:translateY(0);
    }
}

.submenu li {
    list-style:none;
}
.submenu li a {
    padding:12px 16px 12px 50px;
    font-size:13px;
    color:#aeb3c2;
    display:block;
    transition:all .3s ease;
    text-decoration:none;
    position:relative;
    border-radius:6px;
    margin:2px 6px;
}
.submenu li a:hover {
    background:rgba(102,126,234,0.15);
    color:#fff;
    padding-left:54px;
}
.submenu li a::before {
    content:'•';
    position:absolute;
    left:36px;
    color:#667eea;
    transition:all .3s ease;
}
.submenu li a:hover::before {
    color:#fff;
    transform:scale(1.3);
}

/* Collapse behavior */
.sidebar.collapsed .menu-text,
.sidebar.collapsed .submenu,
.sidebar.collapsed .has-sub>a::after {
    display:none;
}
.sidebar.collapsed .nav>li>a {
    justify-content:center;
    padding:14px;
}
.sidebar.collapsed .nav>li>a i {
    margin-right:0;
}

/* Logout button styling */
.sidebar .nav>li form {
    margin:0;
}
.sidebar .nav>li form button {
    width:100%;
    text-align:left;
    background:transparent;
    border:none;
    color:#cfd2dc;
    padding:14px 16px;
    display:flex;
    align-items:center;
    border-radius:8px;
    transition:all .2s;
    cursor:pointer;
}
.sidebar .nav>li form button:hover {
    background:rgba(255,71,87,0.15);
    color:#ff4757;
}
.sidebar .nav>li form button i {
    width:20px;
    font-size:18px;
    text-align:center;
    margin-right:12px;
}
.sidebar.collapsed .nav>li form button {
    justify-content:center;
    padding:14px;
}
.sidebar.collapsed .nav>li form button i {
    margin-right:0;
}

/* ===== CONTENT ===== */
.main-content {
    margin-left:260px;
    margin-top:70px;
    padding:30px;
    transition:margin-left .3s cubic-bezier(0.4, 0, 0.2, 1);
    min-height:calc(100vh - 120px);
}
.sidebar.collapsed ~ .main-content {
    margin-left:70px;
}



/* Breadcrumbs styling */
.breadcrumb {
    background:#fff;
    border-radius:8px;
    padding:12px 20px;
    box-shadow:0 1px 3px rgba(0,0,0,0.05);
    margin-bottom:20px;
}

/* ===== FOOTER ===== */
.footer {
    position:fixed;
    bottom:0;
    left:260px;
    right:0;
    height:50px;
    background:transparent;
    color:#666;
    padding:15px 30px;
    z-index:999;
    display:flex;
    align-items:center;
    justify-content:center;
    transition:left .3s cubic-bezier(0.4, 0, 0.2, 1);
}
.sidebar.collapsed ~ .main-content ~ .footer {
    left:70px;
}



/* ===== RESPONSIVE ===== */
@media (max-width:768px) {
    .sidebar {
        left:-260px;
        z-index:2000;
    }
    .sidebar.show {
        left:0;
    }
    .main-content {
        margin-left:0;
        margin-top:70px;
    }
    .top-notification-bar {
        left:0;
    }
    .footer {
        left:0;
    }
    
    /* Mobile toggle button */
    .mobile-toggle {
        position:fixed;
        top:15px;
        left:15px;
        z-index:1998;
        background:#2c3e50;
        border:none;
        color:#fff;
        font-size:20px;
        cursor:pointer;
        padding:10px;
        border-radius:8px;
        box-shadow:0 2px 8px rgba(0,0,0,0.2);
        display:none;
    }
    @media (max-width:768px) {
        .mobile-toggle {
            display:flex;
            align-items:center;
            justify-content:center;
        }
    }
    
    /* Mobile overlay */
    .sidebar-overlay {
        display:none;
        position:fixed;
        top:0;
        left:0;
        right:0;
        bottom:0;
        background:rgba(0,0,0,0.5);
        z-index:1999;
    }
    .sidebar-overlay.show {
        display:block;
    }
}