/*
 * Twentu CSS Framework
 * A clean, responsive framework with flat design
 * No gradients, no rounded corners
 */

/* ========================================
   CSS Variables / Theme
   ======================================== */
:root {
    /* Primary Colors */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;

    /* Secondary Colors */
    --secondary: #475569;
    --secondary-dark: #334155;
    --secondary-light: #64748b;

    /* Status Colors */
    --success: #16a34a;
    --warning: #ca8a04;
    --danger: #dc2626;
    --info: #0891b2;

    /* Neutral Colors */
    --white: #ffffff;
    --black: #000000;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Consolas', monospace;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Shadows (flat, no blur) */
    --shadow-sm: 0 1px 0 0 var(--gray-200);
    --shadow-md: 0 2px 0 0 var(--gray-200);
    --shadow-lg: 0 4px 0 0 var(--gray-200);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* ========================================
   Reset & Base
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--gray-800);
    background-color: var(--gray-50);
    min-height: 100vh;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

small {
    font-size: 0.875rem;
}

code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background-color: var(--gray-100);
    padding: var(--spacing-xs) var(--spacing-sm);
}

/* ========================================
   Layout - Container
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

.container-narrow {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Grid System (12 columns)
   ======================================== */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(var(--spacing-md) * -0.5);
}

.row > * {
    padding: 0 calc(var(--spacing-md) * 0.5);
}

/* Column classes */
.col { flex: 1 0 0%; }
.col-auto { flex: 0 0 auto; width: auto; }
.col-1 { flex: 0 0 auto; width: 8.333333%; }
.col-2 { flex: 0 0 auto; width: 16.666667%; }
.col-3 { flex: 0 0 auto; width: 25%; }
.col-4 { flex: 0 0 auto; width: 33.333333%; }
.col-5 { flex: 0 0 auto; width: 41.666667%; }
.col-6 { flex: 0 0 auto; width: 50%; }
.col-7 { flex: 0 0 auto; width: 58.333333%; }
.col-8 { flex: 0 0 auto; width: 66.666667%; }
.col-9 { flex: 0 0 auto; width: 75%; }
.col-10 { flex: 0 0 auto; width: 83.333333%; }
.col-11 { flex: 0 0 auto; width: 91.666667%; }
.col-12 { flex: 0 0 auto; width: 100%; }

/* Small screens (576px+) */
@media (min-width: 576px) {
    .col-sm { flex: 1 0 0%; }
    .col-sm-auto { flex: 0 0 auto; width: auto; }
    .col-sm-1 { flex: 0 0 auto; width: 8.333333%; }
    .col-sm-2 { flex: 0 0 auto; width: 16.666667%; }
    .col-sm-3 { flex: 0 0 auto; width: 25%; }
    .col-sm-4 { flex: 0 0 auto; width: 33.333333%; }
    .col-sm-5 { flex: 0 0 auto; width: 41.666667%; }
    .col-sm-6 { flex: 0 0 auto; width: 50%; }
    .col-sm-7 { flex: 0 0 auto; width: 58.333333%; }
    .col-sm-8 { flex: 0 0 auto; width: 66.666667%; }
    .col-sm-9 { flex: 0 0 auto; width: 75%; }
    .col-sm-10 { flex: 0 0 auto; width: 83.333333%; }
    .col-sm-11 { flex: 0 0 auto; width: 91.666667%; }
    .col-sm-12 { flex: 0 0 auto; width: 100%; }
}

/* Medium screens (768px+) */
@media (min-width: 768px) {
    .col-md { flex: 1 0 0%; }
    .col-md-auto { flex: 0 0 auto; width: auto; }
    .col-md-1 { flex: 0 0 auto; width: 8.333333%; }
    .col-md-2 { flex: 0 0 auto; width: 16.666667%; }
    .col-md-3 { flex: 0 0 auto; width: 25%; }
    .col-md-4 { flex: 0 0 auto; width: 33.333333%; }
    .col-md-5 { flex: 0 0 auto; width: 41.666667%; }
    .col-md-6 { flex: 0 0 auto; width: 50%; }
    .col-md-7 { flex: 0 0 auto; width: 58.333333%; }
    .col-md-8 { flex: 0 0 auto; width: 66.666667%; }
    .col-md-9 { flex: 0 0 auto; width: 75%; }
    .col-md-10 { flex: 0 0 auto; width: 83.333333%; }
    .col-md-11 { flex: 0 0 auto; width: 91.666667%; }
    .col-md-12 { flex: 0 0 auto; width: 100%; }
}

/* Large screens (992px+) */
@media (min-width: 992px) {
    .col-lg { flex: 1 0 0%; }
    .col-lg-auto { flex: 0 0 auto; width: auto; }
    .col-lg-1 { flex: 0 0 auto; width: 8.333333%; }
    .col-lg-2 { flex: 0 0 auto; width: 16.666667%; }
    .col-lg-3 { flex: 0 0 auto; width: 25%; }
    .col-lg-4 { flex: 0 0 auto; width: 33.333333%; }
    .col-lg-5 { flex: 0 0 auto; width: 41.666667%; }
    .col-lg-6 { flex: 0 0 auto; width: 50%; }
    .col-lg-7 { flex: 0 0 auto; width: 58.333333%; }
    .col-lg-8 { flex: 0 0 auto; width: 66.666667%; }
    .col-lg-9 { flex: 0 0 auto; width: 75%; }
    .col-lg-10 { flex: 0 0 auto; width: 83.333333%; }
    .col-lg-11 { flex: 0 0 auto; width: 91.666667%; }
    .col-lg-12 { flex: 0 0 auto; width: 100%; }
}

/* Extra large screens (1200px+) */
@media (min-width: 1200px) {
    .col-xl { flex: 1 0 0%; }
    .col-xl-auto { flex: 0 0 auto; width: auto; }
    .col-xl-1 { flex: 0 0 auto; width: 8.333333%; }
    .col-xl-2 { flex: 0 0 auto; width: 16.666667%; }
    .col-xl-3 { flex: 0 0 auto; width: 25%; }
    .col-xl-4 { flex: 0 0 auto; width: 33.333333%; }
    .col-xl-5 { flex: 0 0 auto; width: 41.666667%; }
    .col-xl-6 { flex: 0 0 auto; width: 50%; }
    .col-xl-7 { flex: 0 0 auto; width: 58.333333%; }
    .col-xl-8 { flex: 0 0 auto; width: 66.666667%; }
    .col-xl-9 { flex: 0 0 auto; width: 75%; }
    .col-xl-10 { flex: 0 0 auto; width: 83.333333%; }
    .col-xl-11 { flex: 0 0 auto; width: 91.666667%; }
    .col-xl-12 { flex: 0 0 auto; width: 100%; }
}

/* ========================================
   Flexbox Utilities
   ======================================== */
.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }
.d-block { display: block; }
.d-inline-block { display: inline-block; }
.d-none { display: none; }

.flex-row { flex-direction: row; }
.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }
.align-center { align-items: center; }
.align-stretch { align-items: stretch; }

.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* Responsive display */
@media (min-width: 768px) {
    .d-md-flex { display: flex; }
    .d-md-block { display: block; }
    .d-md-none { display: none; }
}

@media (min-width: 992px) {
    .d-lg-flex { display: flex; }
    .d-lg-block { display: block; }
    .d-lg-none { display: none; }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 2px solid transparent;
    background-color: transparent;
    transition: all var(--transition-fast);
}

.btn:disabled,
.btn.disabled {
    opacity: 0.6;
    pointer-events: none;
}

/* Button Variants */
.btn-primary {
    color: var(--white);
    background-color: var(--primary);
    border-color: var(--primary);
}

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

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

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
}

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

.btn-success:hover {
    background-color: #15803d;
    border-color: #15803d;
}

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

.btn-danger:hover {
    background-color: #b91c1c;
    border-color: #b91c1c;
}

.btn-warning {
    color: var(--gray-900);
    background-color: var(--warning);
    border-color: var(--warning);
}

.btn-warning:hover {
    background-color: #a16207;
    border-color: #a16207;
}

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

.btn-outline-primary:hover {
    color: var(--white);
    background-color: var(--primary);
}

.btn-outline-secondary {
    color: var(--secondary);
    border-color: var(--secondary);
}

.btn-outline-secondary:hover {
    color: var(--white);
    background-color: var(--secondary);
}

.btn-ghost {
    color: var(--gray-700);
    background-color: transparent;
}

.btn-ghost:hover {
    background-color: var(--gray-100);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ========================================
   Forms
   ======================================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--gray-700);
}

.form-control {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--gray-800);
    background-color: var(--white);
    background-clip: padding-box;
    border: 2px solid var(--gray-300);
    appearance: none;
    transition: border-color var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary);
    outline: none;
}

.form-control::placeholder {
    color: var(--gray-400);
}

.form-control:disabled,
.form-control[readonly] {
    background-color: var(--gray-100);
    opacity: 1;
}

/* Form validation states */
.form-control.is-valid {
    border-color: var(--success);
}

.form-control.is-invalid {
    border-color: var(--danger);
}

.invalid-feedback {
    display: none;
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--danger);
}

.is-invalid ~ .invalid-feedback {
    display: block;
}

/* Select */
.form-select {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-xl) var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--gray-800);
    background-color: var(--white);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='square' stroke-linejoin='square' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right var(--spacing-md) center;
    background-size: 16px 12px;
    border: 2px solid var(--gray-300);
    appearance: none;
}

.form-select:focus {
    border-color: var(--primary);
    outline: none;
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin: 0;
    vertical-align: middle;
    background-color: var(--white);
    border: 2px solid var(--gray-400);
    appearance: none;
    cursor: pointer;
}

.form-check-input[type="radio"] {
    border-radius: 50%;
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

.form-check-input:checked[type="checkbox"] {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='square' stroke-linejoin='square' stroke-width='3' d='M6 10l3 3l6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
}

.form-check-input:checked[type="radio"] {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='2' fill='%23fff'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: center;
}

.form-check-label {
    cursor: pointer;
}

/* ========================================
   Cards
   ======================================== */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    background-color: var(--white);
    border: 1px solid var(--gray-200);
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.card-header h1, .card-header h2, .card-header h3,
.card-header h4, .card-header h5, .card-header h6 {
    margin-bottom: 0;
}

.card-body {
    flex: 1 1 auto;
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

/* ========================================
   Tables
   ======================================== */
.table {
    width: 100%;
    margin-bottom: var(--spacing-lg);
    vertical-align: top;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
    text-align: left;
}

.table th {
    font-weight: 600;
    color: var(--gray-700);
    background-color: var(--gray-50);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: var(--gray-50);
}

.table-hover tbody tr:hover {
    background-color: var(--gray-100);
}

.table-bordered {
    border: 1px solid var(--gray-200);
}

.table-bordered th,
.table-bordered td {
    border: 1px solid var(--gray-200);
}

/* Responsive table */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* ========================================
   Alerts
   ======================================== */
.alert {
    position: relative;
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 2px solid transparent;
}

.alert-primary {
    color: #1e40af;
    background-color: #dbeafe;
    border-color: var(--primary);
}

.alert-success {
    color: #166534;
    background-color: #dcfce7;
    border-color: var(--success);
}

.alert-warning {
    color: #854d0e;
    background-color: #fef9c3;
    border-color: var(--warning);
}

.alert-danger {
    color: #991b1b;
    background-color: #fee2e2;
    border-color: var(--danger);
}

.alert-info {
    color: #155e75;
    background-color: #cffafe;
    border-color: var(--info);
}

/* ========================================
   Badges
   ======================================== */
.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
}

.badge-primary {
    color: var(--white);
    background-color: var(--primary);
}

.badge-secondary {
    color: var(--white);
    background-color: var(--secondary);
}

.badge-success {
    color: var(--white);
    background-color: var(--success);
}

.badge-danger {
    color: var(--white);
    background-color: var(--danger);
}

.badge-warning {
    color: var(--gray-900);
    background-color: var(--warning);
}

.badge-info {
    color: var(--white);
    background-color: var(--info);
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    display: flex;
    flex-wrap: wrap;
    padding-left: 0;
    margin-bottom: 0;
    list-style: none;
}

.nav-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--gray-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-tabs {
    border-bottom: 2px solid var(--gray-200);
}

.nav-tabs .nav-link {
    margin-bottom: -2px;
    border-bottom: 2px solid transparent;
}

.nav-tabs .nav-link:hover {
    border-bottom-color: var(--gray-300);
}

.nav-tabs .nav-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* ========================================
   Navbar
   ======================================== */
.navbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-200);
}

.navbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    flex-direction: column;
    padding-left: 0;
    margin: 0;
    list-style: none;
}

@media (min-width: 992px) {
    .navbar-nav {
        flex-direction: row;
    }
}

.navbar-dark {
    background-color: var(--gray-900);
}

.navbar-dark .navbar-brand {
    color: var(--white);
}

.navbar-dark .nav-link {
    color: var(--gray-300);
}

.navbar-dark .nav-link:hover,
.navbar-dark .nav-link.active {
    color: var(--white);
}

/* Mobile menu toggle */
.navbar-toggler {
    padding: var(--spacing-sm);
    font-size: 1.25rem;
    line-height: 1;
    background-color: transparent;
    border: 1px solid var(--gray-300);
    cursor: pointer;
}

@media (min-width: 992px) {
    .navbar-toggler {
        display: none;
    }
}

.navbar-collapse {
    flex-basis: 100%;
    flex-grow: 1;
    align-items: center;
}

@media (max-width: 991.98px) {
    .navbar-collapse {
        display: none;
    }

    .navbar-collapse.show {
        display: block;
    }
}

@media (min-width: 992px) {
    .navbar-collapse {
        display: flex !important;
        flex-basis: auto;
    }
}

/* ========================================
   Sidebar
   ======================================== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 250px;
    background-color: var(--gray-900);
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-700);
}

.sidebar-brand {
    color: var(--white);
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
}

.sidebar-nav {
    padding: var(--spacing-md) 0;
}

.sidebar-nav-item {
    list-style: none;
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--gray-400);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.sidebar-nav-link:hover {
    color: var(--white);
    background-color: var(--gray-800);
}

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

/* Main content with sidebar */
.main-content {
    margin-left: 250px;
    min-height: 100vh;
}

@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }

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

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

/* ========================================
   Modal
   ======================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1050;
    overflow-x: hidden;
    overflow-y: auto;
    outline: 0;
}

.modal.show {
    display: block;
}

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1040;
}

.modal-dialog {
    position: relative;
    width: auto;
    margin: var(--spacing-xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    z-index: 1055;
}

.modal-content {
    position: relative;
    display: flex;
    flex-direction: column;
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
}

.modal-title {
    margin-bottom: 0;
    line-height: 1.5;
}

.modal-body {
    position: relative;
    flex: 1 1 auto;
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
}

.modal-close {
    padding: 0;
    background: transparent;
    border: 0;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
}

.modal-close:hover {
    color: var(--gray-700);
}

/* ========================================
   Spacing Utilities
   ======================================== */
/* Margin */
.m-0 { margin: 0; }
.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }

.ml-0 { margin-left: 0; }
.ml-xs { margin-left: var(--spacing-xs); }
.ml-sm { margin-left: var(--spacing-sm); }
.ml-md { margin-left: var(--spacing-md); }
.ml-lg { margin-left: var(--spacing-lg); }
.ml-xl { margin-left: var(--spacing-xl); }
.ml-auto { margin-left: auto; }

.mr-0 { margin-right: 0; }
.mr-xs { margin-right: var(--spacing-xs); }
.mr-sm { margin-right: var(--spacing-sm); }
.mr-md { margin-right: var(--spacing-md); }
.mr-lg { margin-right: var(--spacing-lg); }
.mr-xl { margin-right: var(--spacing-xl); }
.mr-auto { margin-right: auto; }

.mx-auto { margin-left: auto; margin-right: auto; }

/* Padding */
.p-0 { padding: 0; }
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.pt-0 { padding-top: 0; }
.pt-xs { padding-top: var(--spacing-xs); }
.pt-sm { padding-top: var(--spacing-sm); }
.pt-md { padding-top: var(--spacing-md); }
.pt-lg { padding-top: var(--spacing-lg); }
.pt-xl { padding-top: var(--spacing-xl); }

.pb-0 { padding-bottom: 0; }
.pb-xs { padding-bottom: var(--spacing-xs); }
.pb-sm { padding-bottom: var(--spacing-sm); }
.pb-md { padding-bottom: var(--spacing-md); }
.pb-lg { padding-bottom: var(--spacing-lg); }
.pb-xl { padding-bottom: var(--spacing-xl); }

.pl-0 { padding-left: 0; }
.pl-xs { padding-left: var(--spacing-xs); }
.pl-sm { padding-left: var(--spacing-sm); }
.pl-md { padding-left: var(--spacing-md); }
.pl-lg { padding-left: var(--spacing-lg); }
.pl-xl { padding-left: var(--spacing-xl); }

.pr-0 { padding-right: 0; }
.pr-xs { padding-right: var(--spacing-xs); }
.pr-sm { padding-right: var(--spacing-sm); }
.pr-md { padding-right: var(--spacing-md); }
.pr-lg { padding-right: var(--spacing-lg); }
.pr-xl { padding-right: var(--spacing-xl); }

/* ========================================
   Text Utilities
   ======================================== */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }
.text-muted { color: var(--gray-500); }
.text-white { color: var(--white); }
.text-dark { color: var(--gray-900); }

.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-uppercase { text-transform: uppercase; }
.text-lowercase { text-transform: lowercase; }
.text-capitalize { text-transform: capitalize; }

.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ========================================
   Background Utilities
   ======================================== */
.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--secondary); }
.bg-success { background-color: var(--success); }
.bg-danger { background-color: var(--danger); }
.bg-warning { background-color: var(--warning); }
.bg-info { background-color: var(--info); }
.bg-white { background-color: var(--white); }
.bg-light { background-color: var(--gray-100); }
.bg-dark { background-color: var(--gray-900); }

/* ========================================
   Border Utilities
   ======================================== */
.border { border: 1px solid var(--gray-200); }
.border-0 { border: 0; }
.border-top { border-top: 1px solid var(--gray-200); }
.border-bottom { border-bottom: 1px solid var(--gray-200); }
.border-left { border-left: 1px solid var(--gray-200); }
.border-right { border-right: 1px solid var(--gray-200); }

.border-primary { border-color: var(--primary); }
.border-secondary { border-color: var(--secondary); }
.border-success { border-color: var(--success); }
.border-danger { border-color: var(--danger); }

/* ========================================
   Width & Height Utilities
   ======================================== */
.w-25 { width: 25%; }
.w-50 { width: 50%; }
.w-75 { width: 75%; }
.w-100 { width: 100%; }
.w-auto { width: auto; }

.h-100 { height: 100%; }
.h-auto { height: auto; }

.min-h-screen { min-height: 100vh; }

/* ========================================
   Position Utilities
   ======================================== */
.position-relative { position: relative; }
.position-absolute { position: absolute; }
.position-fixed { position: fixed; }
.position-sticky { position: sticky; top: 0; }

/* ========================================
   Overflow Utilities
   ======================================== */
.overflow-auto { overflow: auto; }
.overflow-hidden { overflow: hidden; }
.overflow-visible { overflow: visible; }
.overflow-scroll { overflow: scroll; }

/* ========================================
   Dashboard Specific
   ======================================== */
.stat-card {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    background-color: var(--white);
    border: 1px solid var(--gray-200);
}

.stat-card-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-card-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

/* App Cards for Dashboard */
.app-card {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    background-color: var(--white);
    border: 2px solid var(--gray-200);
    transition: border-color var(--transition-fast);
    text-decoration: none;
    color: inherit;
}

.app-card:hover {
    border-color: var(--primary);
    text-decoration: none;
}

.app-card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--gray-100);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.app-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.app-card-description {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 0;
}

/* ========================================
   Login Page Specific
   ======================================== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background-color: var(--white);
    border: 1px solid var(--gray-200);
}

.auth-header {
    padding: var(--spacing-xl) var(--spacing-xl) 0;
    text-align: center;
}

.auth-body {
    padding: var(--spacing-xl);
}

.auth-footer {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    text-align: center;
}

/* ========================================
   User Avatar
   ======================================== */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--gray-200);
    color: var(--gray-600);
    font-weight: 600;
    font-size: 1rem;
}

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

.avatar-lg {
    width: 56px;
    height: 56px;
    font-size: 1.25rem;
}

.avatar-xl {
    width: 80px;
    height: 80px;
    font-size: 1.5rem;
}

/* ========================================
   Dropdown
   ======================================== */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    display: none;
    min-width: 200px;
    padding: var(--spacing-sm) 0;
    margin: var(--spacing-xs) 0 0;
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
}

.dropdown-menu.show {
    display: block;
}

.dropdown-menu-right {
    right: 0;
    left: auto;
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--gray-700);
    text-decoration: none;
    background: transparent;
    border: 0;
    text-align: left;
    cursor: pointer;
}

.dropdown-item:hover {
    background-color: var(--gray-100);
    color: var(--gray-900);
}

.dropdown-divider {
    height: 0;
    margin: var(--spacing-sm) 0;
    overflow: hidden;
    border-top: 1px solid var(--gray-200);
}

/* ========================================
   Pagination
   ======================================== */
.pagination {
    display: flex;
    padding-left: 0;
    list-style: none;
}

.page-item {
    margin: 0 2px;
}

.page-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--gray-700);
    text-decoration: none;
    background-color: var(--white);
    border: 1px solid var(--gray-300);
}

.page-link:hover {
    background-color: var(--gray-100);
    border-color: var(--gray-400);
}

.page-item.active .page-link {
    color: var(--white);
    background-color: var(--primary);
    border-color: var(--primary);
}

.page-item.disabled .page-link {
    color: var(--gray-400);
    pointer-events: none;
    background-color: var(--white);
}

/* ========================================
   Loading Spinner
   ======================================== */
.spinner {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    vertical-align: text-bottom;
    border: 3px solid var(--gray-300);
    border-right-color: var(--primary);
    animation: spinner 0.75s linear infinite;
}

.spinner-sm {
    width: 1rem;
    height: 1rem;
    border-width: 2px;
}

@keyframes spinner {
    to {
        transform: rotate(360deg);
    }
}

/* ========================================
   Toast Notifications
   ======================================== */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 1100;
}

.toast {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
    min-width: 300px;
}

.toast-success {
    border-left: 4px solid var(--success);
}

.toast-danger {
    border-left: 4px solid var(--danger);
}

.toast-warning {
    border-left: 4px solid var(--warning);
}

.toast-info {
    border-left: 4px solid var(--info);
}

/* ========================================
   Accessibility
   ======================================== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus visible for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 9999;
}

.skip-link:focus {
    top: 0;
}