:root {
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
    --navbar-height: 70px;
    --primary-color: #2563eb;
    --secondary-color: #475569;
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
}

/* Sidebar Styles */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    transition: all 0.3s ease;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

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

.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
    height: var(--navbar-height);
}

.sidebar-header i {
    font-size: 24px;
    color: var(--primary-color);
}

.sidebar-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.sidebar.collapsed .sidebar-title,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .nav-section-title {
    display: none;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
    overflow-y: auto;
    overflow-x: hidden;
}

/* Hide scrollbar but keep functionality */
.sidebar-nav::-webkit-scrollbar {
    width: 0;
    background: transparent;
}

.sidebar-nav {
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

/* Section Title */
.nav-section-title {
    padding: 16px 20px 8px 20px;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    white-space: nowrap;
}

/* Nav Item Styles */
.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
    cursor: pointer;
}

.nav-item:hover {
    background-color: var(--bg-primary);
    color: var(--primary-color);
}

.nav-item.active {
    background-color: #eff6ff;
    color: var(--primary-color);
    border-right: 3px solid var(--primary-color);
}

.nav-item i {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

/* Dropdown Menu Styles */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
    cursor: pointer;
    width: 100%;
    background: none;
    border: none;
    text-align: left;
}

.nav-dropdown-toggle:hover {
    background-color: var(--bg-primary);
    color: var(--primary-color);
}

.nav-dropdown-toggle.active {
    background-color: #eff6ff;
    color: var(--primary-color);
}

.nav-dropdown-toggle .left-content {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.nav-dropdown-toggle i.fas {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

.nav-dropdown-toggle .fa-chevron-down {
    font-size: 12px;
    transition: transform 0.3s ease;
    width: auto;
}

.nav-dropdown.open .nav-dropdown-toggle .fa-chevron-down {
    transform: rotate(180deg);
}

/* Dropdown Menu */
.nav-dropdown-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: rgba(0, 0, 0, 0.02);
}

.nav-dropdown.open .nav-dropdown-menu {
    max-height: 1000px;
}

.nav-dropdown-menu .nav-item {
    padding-left: 52px;
    font-size: 14px;
}

.nav-dropdown-menu .nav-item i {
    font-size: 16px;
}

/* Collapsed sidebar adjustments */
.sidebar.collapsed .nav-dropdown-toggle .fa-chevron-down,
.sidebar.collapsed .nav-dropdown-menu {
    display: none;
}

.sidebar-footer {
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
}

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

.sidebar.collapsed ~ .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

/* Top Navbar */
.top-navbar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 30px;
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 900;
    box-shadow: var(--shadow);
}

.navbar-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.btn-toggle {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.btn-toggle:hover {
    background-color: var(--bg-primary);
    color: var(--primary-color);
}

.page-title {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 12px;
    color: var(--text-secondary);
}

.search-box input {
    padding: 8px 12px 8px 36px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    width: 250px;
    font-size: 14px;
    transition: all 0.2s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn-icon {
    position: relative;
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.btn-icon:hover {
    background-color: var(--bg-primary);
    color: var(--primary-color);
}

.btn-icon .badge {
    position: absolute;
    top: 2px;
    right: 2px;
    background-color: #ef4444;
    color: white;
    font-size: 10px;
    padding: 2px 5px;
    border-radius: 10px;
}
.user-menu {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.user-menu:hover {
    background-color: var(--bg-primary);
}

.user-menu img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
}

.user-menu span {
    font-weight: 500;
    color: var(--text-primary);
}

.user-menu i {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Content Area */
.content-area {
    padding: 30px;
}

/* Stat Cards */
.stat-card {
    background-color: var(--bg-secondary);
    border-radius: 10px;
    padding: 24px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: all 0.2s ease;
}

.stat-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.stat-icon.blue {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-icon.green {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.stat-icon.orange {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.stat-icon.red {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.stat-details h3 {
    margin: 0;
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-details p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
}

/* Card Styles */
.card {
    background-color: var(--bg-secondary);
    border-radius: 10px;
    box-shadow: var(--shadow);
    border: none;
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    background-color: transparent;
}

.card-header h5 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 20px;
}

/* Table Styles */
.table {
    margin: 0;
}

.table thead th {
    border-bottom: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px;
}

.table tbody td {
    padding: 12px;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-color);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .search-box {
        display: none;
    }
    
    .user-menu span {
        display: none;
    }
}