:root {
    /* Base Theme - Blue Gradient */
    --primary: rgb(0 34 102);
    --primary-gradient: linear-gradient(135deg, rgb(0 34 102) 0%, rgb(0 90 200) 100%);
    --secondary: rgb(25 45 85);
    --secondary-gradient: linear-gradient(135deg, rgb(25 45 85) 0%, rgb(50 80 150) 100%);

    --success: linear-gradient(135deg, #0f9d58 0%, #34a853 100%);
    --danger: linear-gradient(135deg, #c31432 0%, #ff4b2b 100%);
    --warning: linear-gradient(135deg, #ffb347 0%, #ffcc33 100%);
    --info: linear-gradient(135deg, #0072ff 0%, #00c6ff 100%);

    --light: #f1f3f5;
    --dark: #0b132b;

    /* Sidebar and UI */
    --sidebar-bg: linear-gradient(180deg, rgb(0 34 102) 0%, rgb(0 20 60) 100%);
    --sidebar-text: #e9ecef;
    --sidebar-hover: rgba(255, 255, 255, 0.1);
    --card-bg: #ffffff;
    --body-bg: #f6f8fb;

    /* Shadows and Borders */
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    --border-color: rgba(0, 0, 0, 0.08);
}

.btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    border: none;
}

.sidebar {
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
}

.card {
    background: var(--card-bg);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--light);
    color: var(--primary);
}

body.dark-mode {
    background-color: #1a1a1a;
    color: #e9ecef;
}

body.dark-mode .card {
    background-color: #2d2d2d;
    border-color: #444;
    color: #e9ecef;
}

body.dark-mode .table {
    color: #e9ecef;
    border-color: #444;
}

body.dark-mode .table thead th {
    border-color: #444;
    background-color: #1a1a1a;
}

body.dark-mode .form-control,
body.dark-mode .form-select {
    background-color: #2d2d2d;
    border-color: #444;
    color: #e9ecef;
}

body.dark-mode .form-control:focus,
body.dark-mode .form-select:focus {
    background-color: #2d2d2d;
    border-color: var(--primary);
    color: #e9ecef;
}

body.dark-mode .navbar {
    background-color: #1a1a1a !important;
    border-color: #444 !important;
}

body.dark-mode .sidebar {
    background-color: #1a1a1a;
    border-color: #444;
}

body.dark-mode .sidebar .nav-link {
    color: var(--sidebar-text);
}

body.dark-mode .sidebar .nav-link:hover {
    background-color: var(--sidebar-hover);
    color: #fff;
}

body.dark-mode .sidebar .nav-link.active {
    background-color: var(--primary);
    color: #fff;
}

body.dark-mode .text-muted {
    color: #999 !important;
}

body.dark-mode .dropdown-menu {
    background-color: #2d2d2d;
    border-color: #444;
}

body.dark-mode .dropdown-item {
    color: #e9ecef;
}

body.dark-mode .dropdown-item:hover {
    background-color: #444;
    color: #fff;
}

/* Layout */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 250px;
    height: 100vh;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: 0;
    overflow-y: auto;
    z-index: 1000;
    border-right: 1px solid #444;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid #444;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #fff;
}

.sidebar .nav {
    padding: 1rem 0;
}

.sidebar .nav-link {
    color: var(--sidebar-text);
    padding: 0.75rem 1.5rem;
    /* display: flex; */
    align-items: center;
    gap: 0.75rem;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.sidebar .nav-link:hover {
    background-color: var(--sidebar-hover);
    color: #fff;
    border-left-color: var(--primary);
}

.sidebar .nav-link.active {
    background-color: var(--primary);
    color: #fff;
    border-left-color: #fff;
}

.sidebar .nav-link i:last-child {
    margin-left: auto;
    transition: transform 0.3s ease;
}

.sidebar .nav-link[data-bs-toggle="collapse"][aria-expanded="true"] i:last-child {
    transform: rotate(180deg);
}

.main-content {
    margin-left: 250px;
    min-height: 100vh;
}

/* Responsive */
@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }
}

/* Cards */
.card {
    border: 1px solid #dee2e6;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.stat-card {
    border-left: 4px solid var(--primary);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #dee2e6;
    padding: 1rem 1.5rem;
}

body.dark-mode .card-header {
    background-color: #1a1a1a;
    border-color: #444;
}

/* Tables */
.table {
    margin-bottom: 0;
}

.table thead th {
    background-color: #f8f9fa;
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

body.dark-mode .table tbody tr:hover {
    background-color: #2d2d2d;
}

/* Forms */
.form-control,
.form-select {
    border: 1px solid #dee2e6;
    border-radius: 0.375rem;
    transition: all 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Buttons */
.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0b5ed7;
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(13, 110, 253, 0.3);
}

/* Badges */
.badge {
    padding: 0.35rem 0.65rem;
    font-weight: 500;
    font-size: 0.75rem;
}

/* Utilities */
.min-vh-100 {
    min-height: 100vh;
}

.text-balance {
    text-wrap: balance;
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

body.dark-mode ::-webkit-scrollbar-track {
    background: #2d2d2d;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

body.dark-mode ::-webkit-scrollbar-thumb {
    background: #555;
}

body.dark-mode ::-webkit-scrollbar-thumb:hover {
    background: #777;
}