:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: rgba(99, 102, 241, 0.1);
    --secondary: #10b981;
    --accent: #f59e0b;
    --danger: #ef4444;
    --bg-main: #f8fafc;
    --bg-sidebar: #1e293b;
    --bg-card: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --text-light: #f8fafc;
    --border-color: #e2e8f0;
    --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);
    --radius-lg: 1rem;
    --radius-md: 0.75rem;
    --sidebar-width: 280px;
    --navbar-height: 70px;
}

[data-theme="dark"] {
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --primary-light: rgba(99, 102, 241, 0.2);
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    overflow-x: hidden;
    margin: 0;
}

/* Sidebar Layout */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    color: var(--text-light);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-logo {
    width: 40px;
    height: auto;
}

.sidebar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: white;
    text-decoration: none;
}

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

.nav-group {
    margin-bottom: 1.5rem;
}

.nav-group-title {
    padding: 0 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: #475569;
    margin-bottom: 0.5rem;
}

.nav-link-custom {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: #94a3b8;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.nav-link-custom i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.nav-link-custom:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: white;
}

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

.nav-link-custom.active i {
    color: white;
}

/* Main Content */
.main-area {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.top-navbar {
    height: var(--navbar-height);
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 900;
}

.page-content {
    padding: 2rem;
    flex: 1;
}

/* Modern Card */
.card-modern {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Modern Table */
.table-modern {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.table-modern th {
    background-color: var(--bg-main);
    padding: 1rem;
    font-weight: 600;
    text-align: left;
    font-size: 0.875rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

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

.table-modern tr:hover td {
    background-color: var(--primary-light);
}

/* Modern Inputs & Buttons */
.form-control-modern {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.625rem 1rem;
    color: var(--text-main);
    transition: all 0.2s ease;
}

.form-control-modern:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 4px var(--primary-light);
}

.btn-modern-v2 {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    font-size: 0.875rem;
}

.btn-primary-modern {
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.4);
}

.btn-primary-modern:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.4);
}

/* Badges */
.badge-modern {
    padding: 0.35rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background-color: #dcfce7; color: #166534; }
.badge-warning { background-color: #fef9c3; color: #854d0e; }
.badge-danger { background-color: #fee2e2; color: #991b1b; }

/* User UI */
.user-avatar-circle {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-sm {
    width: 32px;
    height: 32px;
    font-size: 0.875rem;
}

.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.btn-modern-small {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

/* Kendo UI Overrides */
.k-grid {
    border: none !important;
    background-color: var(--bg-card) !important;
    font-family: inherit !important;
    border-radius: var(--radius-lg) !important;
    overflow: hidden !important;
}

.k-grid-header {
    padding: 0 !important;
    background-color: var(--bg-main) !important;
    border-bottom: 1px solid var(--border-color) !important;
}

.k-grid-header th.k-header {
    background: var(--bg-main) !important;
    color: var(--text-muted) !important;
    font-weight: 600 !important;
    text-transform: uppercase !important;
    font-size: 0.75rem !important;
    padding: 1rem !important;
    border: none !important;
    vertical-align: middle !important;
}

.k-grid td {
    padding: 1rem !important;
    border-bottom: 1px solid var(--border-color) !important;
    border-left: none !important;
    color: var(--text-main) !important;
}

.k-grid tr:hover {
    background-color: var(--primary-light) !important;
}

.k-dropdown-wrap {
    background: var(--bg-main) !important;
    border-color: var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    padding: 0.25rem 0.5rem !important;
}

.k-chart {
    background: transparent !important;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .main-area {
        margin-left: 0;
    }
    .sidebar.open {
        transform: translateX(0);
    }
}