:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #7c3aed;
    --accent-color: #f59e0b;
    --dark-color: #1e293b;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --text-main: #334155;
    --text-muted: #64748b;
    --border-radius: 12px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-main);
    background-color: var(--light-bg);
}

/* Navbar */
.navbar {
    padding: 1rem 0;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.8) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar-brand {
    font-weight: 800;
    color: var(--primary-color) !important;
    letter-spacing: -0.5px;
}

.nav-link {
    font-weight: 500;
    color: var(--text-main) !important;
    padding: 0.5rem 1.2rem !important;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-color) !important;
    transform: translateY(-1px);
}

.nav-link.active {
    color: var(--primary-color) !important;
}

/* Buttons */
.btn {
    border-radius: 8px;
    padding: 0.6rem 1.5rem;
    font-weight: 600;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* Hero Section */
.hero-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://www.transparenttextures.com/patterns/cubes.png');
    opacity: 0.1;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* Admin Sidebar Modernization */
.sb-nav-fixed #layoutSidenav #layoutSidenav_nav .sb-sidenav {
    background: #0f172a; /* Deep Navy, slightly darker for premium feel */
    box-shadow: 4px 0 15px rgba(0,0,0,0.2);
}

.sb-sidenav-dark .sb-sidenav-menu .nav-link {
    color: rgba(255, 255, 255, 0.85) !important; /* Brighter text for better readability */
    margin: 6px 16px;
    border-radius: 10px;
    padding: 12px 18px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}

.sb-sidenav-dark .sb-sidenav-menu .nav-link .sb-nav-link-icon {
    color: rgba(255, 255, 255, 0.6) !important;
    transition: var(--transition);
}

.sb-sidenav-dark .sb-sidenav-menu .nav-link:hover {
    color: #fff !important;
    background: rgba(255, 255, 255, 0.12) !important;
}

.sb-sidenav-dark .sb-sidenav-menu .nav-link:hover .sb-nav-link-icon {
    color: #fff !important;
}

.sb-sidenav-dark .sb-sidenav-menu .nav-link.active {
    color: #fff !important;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%) !important;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
}

.sb-sidenav-dark .sb-sidenav-menu .nav-link.active .sb-nav-link-icon {
    color: #fff !important;
}

.sb-sidenav-dark .sb-sidenav-menu-heading {
    color: rgba(255, 255, 255, 0.4) !important;
    font-size: 0.7rem !important;
    font-weight: 700 !important;
    letter-spacing: 1.5px !important;
    margin-top: 25px !important;
    padding-bottom: 5px !important;
}

.sb-topnav.navbar-dark.bg-dark {
    background-color: #0f172a !important; /* Match sidebar */
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sb-sidenav-footer {
    background-color: #020617 !important; /* Slightly darker than sidebar */
    border-top: 1px solid rgba(255, 255, 255, 0.05) !important;
    color: rgba(255, 255, 255, 0.5) !important;
}

.sb-sidenav-footer .fw-bold {
    color: #fff !important;
}

/* Tables */
.table {
    background: white;
    border-radius: 12px;
    overflow: hidden;
}

.table thead th {
    background: #f1f5f9;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 1rem;
    border: none;
}

.table tbody td {
    padding: 0.75rem 1rem;
    vertical-align: middle;
}

/* Badges */
.badge {
    padding: 0.5em 1em;
    font-weight: 600;
    border-radius: 6px;
}

/* Custom Tabs Styling */
.custom-tabs .nav-link {
    color: var(--text-muted) !important;
    font-weight: 600;
    padding: 1rem 1.5rem !important;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    transition: var(--transition);
    background: transparent !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.custom-tabs .nav-link:hover {
    color: var(--primary-color) !important;
    border-bottom: 2px solid rgba(79, 70, 229, 0.2);
}

.custom-tabs .nav-link.active {
    color: var(--primary-color) !important;
    border-bottom: 2px solid var(--primary-color);
}

.custom-tabs .nav-link .badge {
    font-size: 0.7rem;
    padding: 0.25em 0.6em;
    border-radius: 20px;
    background-color: #f1f5f9;
    color: var(--text-muted);
    transition: var(--transition);
}

.custom-tabs .nav-link.active .badge {
    background-color: var(--primary-color);
    color: white;
}

/* Extra Small Buttons */
.btn-xs {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 4px;
}

.btn-group-xs > .btn, .btn-xs {
    padding: 0.25rem 0.4rem;
    font-size: 0.75rem;
    line-height: 1.5;
    border-radius: 4px;
}