:root {
    --sidebar-width: 250px;
    --sidebar-collapsed-width: 70px;
    --topbar-height: 70px;
    --primary-color: #0d6efd;
    --sidebar-bg: #212529;
    --sidebar-hover: #2c3136;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f8f9fa;
}

.wrapper {
    display: flex;
    min-height: 100vh;
}

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

.sidebar-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h4 {
    color: white;
    font-size: 1.25rem;
    font-weight: 600;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.sidebar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 0.875rem 1.25rem;
    display: flex;
    align-items: center;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.sidebar-nav .nav-link i {
    font-size: 1.25rem;
    margin-right: 0.75rem;
    width: 24px;
    text-align: center;
}

.sidebar-nav .nav-link:hover {
    background-color: var(--sidebar-hover);
    color: white;
}

.sidebar-nav .nav-link.active {
    background-color: rgba(13, 110, 253, 0.1);
    color: white;
    border-left-color: var(--primary-color);
}

.sidebar-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

/* Top Navbar */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.04);
    min-height: var(--topbar-height);
}

.navbar .input-group-text {
    background-color: white;
}

.navbar .form-control:focus {
    box-shadow: none;
    border-color: #dee2e6;
}

.profile-pic {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #e9ecef;
    overflow: hidden;
}

.notification-dropdown {
    min-width: 300px;
}

.notification-dropdown .dropdown-item {
    white-space: normal;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
}

/* Content Area */
.content-area {
    flex: 1;
    background-color: #f8f9fa;
}

/* Dashboard Cards */
.stat-card {
    border-radius: 0.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.stat-card .card-body {
    padding: 1.5rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.bg-primary-subtle {
    background-color: rgba(13, 110, 253, 0.1) !important;
    color: #0d6efd;
}

.stat-icon.bg-success-subtle {
    background-color: rgba(25, 135, 84, 0.1) !important;
    color: #198754;
}

.stat-icon.bg-warning-subtle {
    background-color: rgba(255, 193, 7, 0.1) !important;
    color: #ffc107;
}

.stat-icon.bg-info-subtle {
    background-color: rgba(13, 202, 240, 0.1) !important;
    color: #0dcaf0;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    margin: 0.5rem 0;
}

.stat-label {
    color: #6c757d;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 992px) {
    .sidebar {
        width: var(--sidebar-collapsed-width);
    }
    
    .sidebar-header h4,
    .sidebar-nav .nav-link span,
    .sidebar-footer {
        display: none;
    }
    
    .sidebar-nav .nav-link {
        justify-content: center;
    }
    
    .sidebar-nav .nav-link i {
        margin-right: 0;
    }
    
    .main-content {
        margin-left: var(--sidebar-collapsed-width);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
}

/* Table Styles */
.table-hover tbody tr:hover {
    background-color: rgba(0,0,0,0.02);
}

/* Badge Styles */
.badge {
    padding: 0.35em 0.65em;
    font-weight: 500;
}

/* Chart Container */
.chart-container {
    position: relative;
    height: 300px;
}

/* Custom Scrollbar */
.sidebar-nav::-webkit-scrollbar {
    width: 6px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Login Page */
body.login-page {
    background-color: #f8f9fa;
    min-height: 100vh;
}

.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.login-card {
    width: 100%;
    max-width: 400px;
    border-radius: 0.75rem;
}