:root {
    /* Color Palette - Indigo Premium theme */
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #e0e7ff;
    
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --secondary-light: #f1f5f9;

    --success-color: #10b981;
    --success-light: #d1fae5;
    
    --warning-color: #f59e0b;
    --warning-light: #fef3c7;
    
    --danger-color: #ef4444;
    --danger-light: #fee2e2;
    
    --info-color: #06b6d4;
    --info-light: #ecfeff;

    /* Dark theme / background colors */
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    --bg-navbar: #ffffff;
    
    --border-color: #e2e8f0;
    --text-main: #1e293b;
    --text-muted: #64748b;
    
    /* Layout properties */
    --sidebar-width: 260px;
    --navbar-height: 70px;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    
    --box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --box-shadow-hover: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Variables Override */
[data-bs-theme="dark"] {
    --bg-body: #090d16;
    --bg-card: #111827;
    --bg-navbar: #111827;
    --border-color: #1f2937;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --secondary-light: #1f2937;
    --box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3);
}

/* Base Styles */
body {
    background-color: var(--bg-body);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 0.925rem;
    overflow-x: hidden;
    transition: var(--transition);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}
a:hover {
    color: var(--primary-hover);
}

/* Scrollbar customization */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Premium Layout Grid */
#wrapper {
    display: flex;
    width: 100%;
    align-items: stretch;
}

/* Sidebar Styling */
#sidebar {
    min-width: var(--sidebar-width);
    max-width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    color: #f8fafc;
    transition: var(--transition);
    min-height: 100vh;
    z-index: 1000;
    box-shadow: 4px 0 10px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
}

#sidebar.active {
    margin-left: calc(-1 * var(--sidebar-width));
}

#sidebar .sidebar-header {
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

#sidebar .brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: #ffffff;
}

#sidebar .brand-link i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

#sidebar .sidebar-menu {
    list-style: none;
    padding: 1rem 0;
    margin: 0;
    flex: 1;
    overflow-y: auto;
}

#sidebar .menu-header {
    padding: 0.75rem 1.5rem 0.25rem 1.5rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
    font-weight: 700;
}

#sidebar .sidebar-menu li a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: #94a3b8;
    font-weight: 500;
    gap: 12px;
    border-left: 3px solid transparent;
}

#sidebar .sidebar-menu li a:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.03);
    border-left-color: var(--primary-color);
}

#sidebar .sidebar-menu li.active > a {
    color: #ffffff;
    background-color: rgba(99, 102, 241, 0.15);
    border-left-color: var(--primary-color);
}

#sidebar .sidebar-menu li a i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

#sidebar .sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(0, 0, 0, 0.15);
}

/* Page Content Wrapper */
#content {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

/* Navbar Styling */
.main-navbar {
    height: var(--navbar-height);
    background-color: var(--bg-navbar);
    border-bottom: 1px solid var(--border-color);
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
    position: sticky;
    top: 0;
    z-index: 999;
}

.navbar-left, .navbar-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Premium Card Styles */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--box-shadow-hover);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
}

.card-footer {
    background-color: transparent;
    border-top: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
}

/* Custom stats widgets */
.stat-card {
    position: relative;
    overflow: hidden;
}

.stat-card .card-icon {
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
    opacity: 0.15;
    transition: var(--transition);
}

.stat-card:hover .card-icon {
    transform: translateY(-55%) scale(1.1);
    opacity: 0.25;
}

/* Custom Buttons */
.btn {
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    padding: 0.5rem 1.25rem;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}
.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background-color: var(--primary-hover) !important;
    border-color: var(--primary-hover) !important;
}

/* Glassmorphism Classes */
.glass {
    background: rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-bs-theme="dark"] .glass {
    background: rgba(17, 24, 39, 0.65);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Alert modifications */
.alert {
    border-radius: var(--border-radius-sm);
    border: none;
}

/* Responsive elements */
@media (max-width: 991.98px) {
    #sidebar {
        margin-left: calc(-1 * var(--sidebar-width));
    }
    #sidebar.active {
        margin-left: 0;
    }
}