:root {
    /* Color Palette (Tailwind-inspired) */
    --primary-color: #4f46e5;
    /* Indigo 600 */
    --primary-hover: #4338ca;
    /* Indigo 700 */
    --secondary-color: #64748b;
    /* Slate 500 */
    --success-color: #10b981;
    /* Emerald 500 */
    --danger-color: #ef4444;
    /* Red 500 */
    --warning-color: #f59e0b;
    /* Amber 500 */
    --info-color: #3b82f6;
    /* Blue 500 */

    --bg-body: #f1f5f9;
    /* Slate 100 */
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    /* Slate 900 */

    --text-main: #111827;
    /* Gray 900 */
    --text-muted: #6b7280;
    /* Gray 500 */
    --text-light: #f8fafc;
    /* Slate 50 */

    --border-color: #e2e8f0;
    /* Slate 200 */

    /* Shadows */
    --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 */
    --radius-md: 0.375rem;
    --radius-lg: 0.75rem;
}

body {
    background-color: var(--bg-body);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    line-height: 1.5;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    color: var(--text-main);
    letter-spacing: -0.025em;
    /* Tight typography */
}

a {
    text-decoration: none;
}

.text-muted {
    color: var(--text-muted) !important;
}

.text-primary {
    color: var(--primary-color) !important;
}

.fw-bold {
    font-weight: 600 !important;
}

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

/* Sidebar */
#sidebar {
    min-width: 260px;
    max-width: 260px;
    background: var(--bg-sidebar);
    color: var(--text-light);
    transition: all 0.3s;
    min-height: 100vh;
    z-index: 1000;
}

#sidebar .sidebar-header {
    padding: 1.5rem;
    background: transparent;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

#sidebar .sidebar-header h3 {
    color: var(--text-light);
    font-size: 1.25rem;
    margin: 0;
    font-weight: 700;
    letter-spacing: -0.025em;
}

#sidebar ul.components {
    padding: 1rem 0;
}

#sidebar ul li {
    margin: 0.25rem 0.75rem;
}

#sidebar ul li a {
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #94a3b8;
    /* Slate 400 */
    border-radius: var(--radius-md);
    transition: all 0.2s;
    font-weight: 500;
}

#sidebar ul li a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

#sidebar ul li.active>a {
    color: #fff;
    background: var(--primary-color);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
}

#sidebar ul li a i {
    width: 1.25rem;
    text-align: center;
    font-size: 1rem;
    opacity: 0.8;
}

/* Content */
#content {
    width: 100%;
    padding: 2rem;
    min-height: 100vh;
    transition: all 0.3s;
}

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

.card:hover {
    /* Only hover effect if it has a cursor-pointer class usually, but subtle global lift is okay */
    /* box-shadow: var(--shadow-md); */
}

.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

.shadow {
    box-shadow: var(--shadow-md) !important;
}

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

.card-body {
    padding: 1.5rem;
}

/* Buttons */
.btn {
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem;
    font-weight: 500;
    transition: all 0.2s;
    letter-spacing: -0.01em;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 1px 2px 0 rgba(79, 70, 229, 0.3);
}

.btn-primary:hover,
.btn-primary:active,
.btn-primary:focus {
    background-color: var(--primary-hover) !important;
    border-color: var(--primary-hover) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.4);
}

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

.btn-outline-primary:hover {
    background-color: #f5f3ff;
    /* Very light indigo */
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

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

/* Form Controls */
.form-control,
.form-select {
    border-radius: var(--radius-md);
    border-color: var(--border-color);
    padding: 0.5rem 0.75rem;
    font-size: 0.95rem;
    background-color: #fff;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.input-group-text {
    background-color: #f8fafc;
    border-color: var(--border-color);
    color: var(--text-muted);
}

/* Tables */
.table {
    border-collapse: separate;
    border-spacing: 0;
}

.table thead th {
    background-color: #f8fafc;
    /* Slate 50 */
    border-bottom: 1px solid var(--border-color);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 0.75rem 1rem;
    white-space: nowrap;
}

.table tbody td {
    padding: 0.75rem 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 0.95rem;
}

.table-hover tbody tr:hover {
    background-color: #f8fafc;
}

/* Utilities */
.cursor-pointer {
    cursor: pointer;
}

.hover-scale:hover {
    transform: scale(1.05);
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.3s ease-out forwards;
}

/* Responsive */
@media (max-width: 768px) {
    #sidebar {
        margin-left: -260px;
        position: fixed;
        height: 100vh;
        box-shadow: none;
    }

    #sidebar.active {
        margin-left: 0;
        box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    }

    #content {
        padding: 1rem;
    }
}

/* Sidebar Overlay */
#sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.6);
    /* Slate 900 opacity 60% */
    backdrop-filter: blur(2px);
    z-index: 999;
}

#sidebar-overlay.active {
    display: block;
}

/* Select2 overrides for congruency */
.select2-container .select2-selection--single {
    height: 38px !important;
    border-color: var(--border-color) !important;
    border-radius: var(--radius-md) !important;
}

.select2-container--bootstrap-5 .select2-selection {
    border-color: var(--border-color) !important;
    padding-top: 0.25rem;
}

.select2-container--bootstrap-5 .select2-dropdown .select2-results__option--highlighted[aria-selected] {
    background-color: var(--primary-color) !important;
}