:root {
    --sidebar-w: 260px;
    --sidebar-collapsed: 70px;
    --primary: #0073aa;
    --dark: #1a1a1a;
    --bg: #f4f7f9;
}

body {
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    background: var(--bg);
    overflow-x: hidden;
}

/* Sidebar Styling */
.sidebar {
    width: var(--sidebar-w);
    background: var(--dark);
    color: #fff;
    height: 100vh;
    position: fixed;
    transition: 0.3s ease;
    z-index: 1000;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-brand {
    padding: 20px;
    background: var(--primary);
    text-align: center;
    font-weight: bold;
    overflow: hidden;
}

.sidebar.collapsed .brand-full { display: none; }
.sidebar:not(.collapsed) .brand-short { display: none; }

/* Navigation Links */
.nav-links { list-style: none; padding: 0; margin: 10px 0; }
.nav-links li a {
    color: #adb5bd;
    text-decoration: none;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    transition: 0.3s;
}

.nav-links li.active > a, .nav-links li a:hover {
    background: #2d2d2d;
    color: #fff;
    border-left: 4px solid var(--primary);
}

.nav-links li a i { min-width: 35px; font-style: normal; }
.sidebar.collapsed .nav-links li a span { display: none; }

/* Sub-menu styling */
.sub-menu-list {
    background: #111;
    list-style: none;
    padding: 0;
    display: none; /* JS se toggle hoga */
}

.sidebar:not(.collapsed) li.active .sub-menu-list {
    display: block;
}

.sub-menu-list li a { padding-left: 55px; font-size: 13px; }

/* Main Wrapper */
.main-wrapper {
    margin-left: var(--sidebar-w);
    transition: 0.3s ease;
}

.sidebar.collapsed + .main-wrapper {
    margin-left: var(--sidebar-collapsed);
}

/* Header & Cards */
.top-header {
    background: #fff;
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 25px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.role-badge {
    background: #e3f2fd;
    color: #0073aa;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: bold;
}

.card {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}