:root {
    --primary-color: #3b82f6;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #0ea5e9;
    --dark-bg: #0f172a;
    --sidebar-dark: #1e293b;
    --content-bg: #f8fafc;
    --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --card-shadow-hover: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --card-border-radius: 12px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--content-bg);
    color: #334155;
    font-size: 0.95rem;
}

/* Navbar Modernization */
.main-header {
    border-bottom: 1px solid #e2e8f0 !important;
    box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
}

/* Sidebar Modernization */
.main-sidebar {
    background-color: var(--dark-bg) !important;
    box-shadow: 4px 0 10px rgba(0, 0, 0, 0.1) !important;
}

.brand-link {
    border-bottom: 1px solid #1e293b !important;
    padding: 1.25rem 1rem !important;
}

.brand-text {
    font-weight: 700 !important;
    letter-spacing: -0.025em;
    color: #fff !important;
}

.sidebar {
    padding-top: 1rem;
}

.nav-sidebar .nav-item>.nav-link {
    border-radius: 8px;
    margin-bottom: 4px;
    padding: 0.75rem 1rem;
    color: #94a3b8 !important;
    transition: all 0.2s;
}

.nav-sidebar .nav-item>.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.05) !important;
    color: #fff !important;
}

.nav-sidebar .nav-item>.nav-link.active {
    background-color: var(--primary-color) !important;
    color: #fff !important;
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.3) !important;
}

.nav-treeview>.nav-item>.nav-link {
    padding-left: 2.5rem !important;
}

/* Card Modernization */
.card {
    border: 1px solid #f1f5f9 !important;
    border-radius: var(--card-border-radius);
    box-shadow: var(--card-shadow);
    margin-bottom: 1.5rem;
    background: #fff;
    transition: all 0.3s ease;
}

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

.card-header {
    background-color: transparent !important;
    border-bottom: 1px solid #f1f5f9 !important;
    padding: 1.25rem 1.5rem !important;
}

.card-title {
    font-weight: 600;
    font-size: 1.1rem;
    color: #1e293b;
}

.card-body {
    padding: 1.5rem !important;
}

/* Table Modernization */
.table {
    color: #475569;
}

.table thead th {
    background-color: #f8fafc;
    border-top: none !important;
    border-bottom: 1px solid #e2e8f0 !important;
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: #64748b;
    padding: 1rem 1.5rem !important;
}

.table td {
    padding: 1rem 1.5rem !important;
    vertical-align: middle !important;
    border-top: 1px solid #f1f5f9 !important;
}

/* Small Box / Info Box */
.small-box {
    border-radius: var(--card-border-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    border: none;
    transition: transform 0.2s;
}

.small-box:hover {
    transform: translateY(-4px);
}

.small-box .inner {
    padding: 1.5rem !important;
}

.small-box h3 {
    font-weight: 800 !important;
    font-size: 2rem !important;
}

/* Badges */
.badge {
    padding: 0.4em 0.8em;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

/* Buttons */
.btn {
    border-radius: 8px;
    padding: 0.6rem 1.25rem;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-sm {
    padding: 0.35rem 0.85rem;
    font-size: 0.875rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.2);
}

.btn-primary:hover {
    background-color: #2563eb;
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.3);
}

.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
    box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.2);
}

.btn-success:hover {
    background-color: #059669;
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(16, 185, 129, 0.3);
}

/* Content Header */
.content-wrapper {
    background: var(--content-bg) !important;
}

.content-header h1 {
    font-weight: 800;
    color: #0f172a;
    letter-spacing: -0.025em;
}

/* DataTables customization */
.dataTables_wrapper .dataTables_paginate .paginate_button {
    border-radius: 6px !important;
    border: 1px solid #e2e8f0 !important;
    margin-left: 4px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: white !important;
}