/**
 * ================================================================
 * TRAVEL MANAGEMENT SYSTEM - Main Stylesheet
 * ================================================================
 * Theme: Glass Morphism Blue
 * ================================================================
 */

/* ================================================================
   CSS VARIABLES
   ================================================================ */
:root {
    /* Primary Colors */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;
    --primary-950: #172554;

    /* Neutral Colors */
    --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;

    /* Status Colors */
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #06b6d4;
    --info-light: #cffafe;

    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-bg-dark: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
    --glass-blur: blur(10px);

    /* Layout */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
    --header-height: 65px;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-sm: 8px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
}

/* ================================================================
   BASE STYLES
   ================================================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-800);
    background: #f0f4f8;
    min-height: 100vh;
}

body.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-700) 50%, var(--primary-500) 100%);
    background-attachment: fixed;
}

a {
    color: var(--primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-700);
}

img {
    max-width: 100%;
    height: auto;
}

/* ================================================================
   TYPOGRAPHY
   ================================================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

.h1 { font-size: var(--font-size-3xl); font-weight: 600; }
.h2 { font-size: var(--font-size-2xl); font-weight: 600; }
.h3 { font-size: var(--font-size-xl); font-weight: 600; }
.h4 { font-size: var(--font-size-lg); font-weight: 600; }

.page-header {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(239, 246, 255, 0.95) 100%);
}

.page-header:hover {
    transform: none;
}

p {
    margin-bottom: 1rem;
}

.text-muted { color: var(--gray-500); }
.text-primary { color: var(--primary-600); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-info { color: var(--info); }

.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.text-lg { font-size: var(--font-size-lg); }

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

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

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition-base);
}

.sidebar-collapsed .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

.content-wrapper {
    flex: 1;
    padding: 1.5rem;
    margin-top: var(--header-height);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ================================================================
   GLASS CARD - Blue Glass Effect
   ================================================================ */
.glass-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(239, 246, 255, 0.9) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(59, 130, 246, 0.15);
    box-shadow: 
        0 4px 6px -1px rgba(59, 130, 246, 0.1),
        0 10px 20px -5px rgba(59, 130, 246, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.5) inset;
    padding: 1.5rem;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 8px 15px -3px rgba(59, 130, 246, 0.15),
        0 20px 40px -10px rgba(59, 130, 246, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.6) inset;
}

.glass-card-solid {
    background: white;
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.07),
        0 10px 20px -5px rgba(0, 0, 0, 0.1);
}

.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 1.5rem;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-200);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-800);
    margin: 0;
}

/* ================================================================
   SIDEBAR
   ================================================================ */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, var(--primary-950) 0%, var(--primary-900) 100%);
    z-index: var(--z-fixed);
    transition: width var(--transition-base);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.sidebar-collapsed .sidebar {
    width: var(--sidebar-collapsed-width);
}

.sidebar-header {
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    object-fit: contain;
    background: white;
    padding: 4px;
    flex-shrink: 0;
}

.sidebar-brand {
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 700;
    white-space: nowrap;
    opacity: 1;
    transition: opacity var(--transition-base);
}

.sidebar-collapsed .sidebar-brand {
    opacity: 0;
    width: 0;
}

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

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

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

.nav-section-title {
    padding: 0.5rem 1.25rem;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary-300);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-collapsed .nav-section-title {
    text-align: center;
    padding: 0.5rem;
}

.nav-item {
    padding: 0 0.75rem;
    margin-bottom: 0.25rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--primary-100);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-link.active {
    background: var(--primary-500);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.nav-link span {
    opacity: 1;
    transition: opacity var(--transition-base);
}

.sidebar-collapsed .nav-link span {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.nav-badge {
    margin-left: auto;
    background: var(--danger);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 0.125rem 0.5rem;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

/* Submenu */
.nav-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.nav-item.open .nav-submenu {
    max-height: 500px;
}

.nav-submenu .nav-link {
    padding-left: 3rem;
    font-size: var(--font-size-sm);
}

.nav-toggle {
    cursor: pointer;
}

.nav-toggle::after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 0.75rem;
    margin-left: auto;
    transition: transform var(--transition-fast);
}

.nav-item.open .nav-toggle::after {
    transform: rotate(180deg);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ================================================================
   HEADER
   ================================================================ */
.header {
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sidebar-width);
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    z-index: var(--z-sticky);
    transition: left var(--transition-base);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
}

.sidebar-collapsed .header {
    left: var(--sidebar-collapsed-width);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--gray-600);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

.breadcrumb a {
    color: var(--gray-500);
}

.breadcrumb a:hover {
    color: var(--primary-600);
}

.breadcrumb-separator {
    color: var(--gray-300);
}

.breadcrumb-current {
    color: var(--gray-800);
    font-weight: 500;
}

.header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Company Switcher */
.company-switcher {
    position: relative;
}

.company-switcher-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--primary-50);
    border: 1px solid var(--primary-200);
    border-radius: var(--border-radius-sm);
    color: var(--primary-700);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.company-switcher-btn:hover {
    background: var(--primary-100);
}

.company-switcher-btn i {
    font-size: 0.875rem;
}

/* Notification */
.notification-btn {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--gray-600);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.notification-btn:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.notification-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 18px;
    height: 18px;
    background: var(--danger);
    color: white;
    font-size: 0.65rem;
    font-weight: 600;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* User Menu */
.user-menu {
    position: relative;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.375rem;
    padding-right: 0.75rem;
    background: transparent;
    border: 1px solid var(--gray-200);
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.user-menu-btn:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--primary-100);
}

.user-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-700);
}

.user-menu-btn i {
    font-size: 0.75rem;
    color: var(--gray-400);
}

/* ================================================================
   DROPDOWN
   ================================================================ */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 200px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: var(--z-dropdown);
    overflow: hidden;
}

.dropdown.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--gray-700);
    font-size: var(--font-size-sm);
    transition: background var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--gray-50);
}

.dropdown-item i {
    width: 16px;
    color: var(--gray-400);
}

.dropdown-divider {
    height: 1px;
    background: var(--gray-100);
    margin: 0.5rem 0;
}

/* ================================================================
   BUTTONS
   ================================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-200);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-success:hover:not(:disabled) {
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
    transform: translateY(-1px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover:not(:disabled) {
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.4);
    transform: translateY(-1px);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover:not(:disabled) {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-outline-primary {
    background: transparent;
    border: 1px solid var(--primary-500);
    color: var(--primary-600);
}

.btn-outline-primary:hover:not(:disabled) {
    background: var(--primary-50);
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: var(--font-size-base);
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
}

.btn-icon.btn-sm {
    width: 30px;
    height: 30px;
}

.btn-group {
    display: inline-flex;
    gap: 0.5rem;
}

/* ================================================================
   FORMS
   ================================================================ */
.form-group {
    margin-bottom: 1.25rem;
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-200);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.form-label.required::after {
    content: ' *';
    color: var(--danger);
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: var(--font-size-sm);
    color: var(--gray-800);
    background: white;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control:disabled {
    background: var(--gray-100);
    cursor: not-allowed;
}

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

.form-control.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.invalid-feedback {
    font-size: var(--font-size-xs);
    color: var(--danger);
    margin-top: 0.375rem;
}

.form-text {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
    margin-top: 0.375rem;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

select.form-control {
    cursor: pointer;
}

/* Input Group */
.input-group {
    display: flex;
}

.input-group .form-control {
    flex: 1;
}

.input-group .form-control:not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.input-group .form-control:not(:last-child) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: 0.625rem 0.875rem;
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
}

.input-group-text:first-child {
    border-right: none;
    border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
}

.input-group-text:last-child {
    border-left: none;
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.form-check-input {
    width: 18px;
    height: 18px;
    border: 2px solid var(--gray-300);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.form-check-input:checked {
    background: var(--primary-500);
    border-color: var(--primary-500);
}

.form-check-label {
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    cursor: pointer;
}

/* ================================================================
   TABLES
   ================================================================ */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--border-radius);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table th,
.table td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

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

.table tbody tr {
    transition: background var(--transition-fast);
}

.table tbody tr:hover {
    background: var(--gray-50);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

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

.table-striped tbody tr:nth-child(odd):hover {
    background: var(--gray-100);
}

/* ================================================================
   BADGES & STATUS
   ================================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.625rem;
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: 50px;
}

.badge-primary {
    background: var(--primary-100);
    color: var(--primary-700);
}

.badge-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.badge-success {
    background: var(--success-light);
    color: #065f46;
}

.badge-warning {
    background: var(--warning-light);
    color: #92400e;
}

.badge-danger {
    background: var(--danger-light);
    color: #991b1b;
}

.badge-info {
    background: var(--info-light);
    color: #0e7490;
}

/* ================================================================
   ALERTS
   ================================================================ */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.alert i {
    font-size: 1.1rem;
    margin-top: 0.125rem;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.alert-success {
    background: var(--success-light);
    color: #065f46;
    border-left: 4px solid var(--success);
}

.alert-warning {
    background: var(--warning-light);
    color: #92400e;
    border-left: 4px solid var(--warning);
}

.alert-danger {
    background: var(--danger-light);
    color: #991b1b;
    border-left: 4px solid var(--danger);
}

.alert-info {
    background: var(--info-light);
    color: #0e7490;
    border-left: 4px solid var(--info);
}

/* ================================================================
   MODAL
   ================================================================ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-backdrop.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    z-index: var(--z-modal);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.modal-lg {
    max-width: 800px;
}

.modal-xl {
    max-width: 1100px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--gray-400);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    max-height: calc(90vh - 140px);
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
}

/* ================================================================
   STAT CARDS
   ================================================================ */
.account-tabs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    padding: 0.5rem;
}

.tab-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    border-color: var(--primary-500);
    color: var(--primary-600);
}

.tab-btn.active {
    background: var(--primary-500);
    border-color: var(--primary-500);
    color: white;
}

.stat-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(239, 246, 255, 0.9) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(59, 130, 246, 0.15);
    box-shadow: 
        0 4px 6px -1px rgba(59, 130, 246, 0.1),
        0 10px 20px -5px rgba(59, 130, 246, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.5) inset;
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 8px 15px -3px rgba(59, 130, 246, 0.15),
        0 20px 40px -10px rgba(59, 130, 246, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.6) inset;
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.blue {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    color: white;
}

.stat-icon.green {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
}

.stat-icon.yellow {
    background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
    color: white;
}

.stat-icon.red {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
    color: white;
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.2;
}

.stat-change {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: var(--font-size-xs);
    font-weight: 500;
    margin-top: 0.5rem;
}

.stat-change.up {
    color: var(--success);
}

.stat-change.down {
    color: var(--danger);
}

/* ================================================================
   PAGINATION
   ================================================================ */
.pagination {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 0.5rem;
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    background: white;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.page-link:hover {
    background: var(--gray-50);
    color: var(--gray-800);
}

.page-link.active {
    background: var(--primary-500);
    border-color: var(--primary-500);
    color: white;
}

.page-link.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ================================================================
   TOAST NOTIFICATIONS
   ================================================================ */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: var(--z-tooltip);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    min-width: 300px;
    max-width: 400px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
}

.toast.success .toast-icon {
    background: var(--success-light);
    color: var(--success);
}

.toast.error .toast-icon {
    background: var(--danger-light);
    color: var(--danger);
}

.toast.warning .toast-icon {
    background: var(--warning-light);
    color: var(--warning);
}

.toast.info .toast-icon {
    background: var(--info-light);
    color: var(--info);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: 0.125rem;
}

.toast-message {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
}

.toast-close {
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: 0.25rem;
}

/* ================================================================
   CHARTS CONTAINER
   ================================================================ */
.chart-container {
    position: relative;
    height: 300px;
}

.chart-container canvas {
    max-height: 100%;
}

/* ================================================================
   LOADING & SPINNER
   ================================================================ */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
}

/* ================================================================
   AUTH PAGE STYLES
   ================================================================ */
.auth-container {
    width: 100%;
    max-width: 420px;
}

.auth-card {
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    padding: 2.5rem;
}

.auth-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: block;
}

.auth-title {
    text-align: center;
    font-size: var(--font-size-2xl);
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    text-align: center;
    color: var(--gray-500);
    margin-bottom: 2rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

/* ================================================================
   EMPTY STATE
   ================================================================ */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--gray-400);
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.empty-state-text {
    color: var(--gray-500);
    margin-bottom: 1.5rem;
}

/* ================================================================
   UTILITY CLASSES
   ================================================================ */
.d-flex { display: flex; }
.d-grid { display: grid; }
.d-none { display: none; }
.d-block { display: block; }

.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }

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

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

.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-5 { gap: 1.5rem; }

.m-0 { margin: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-5 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.5rem; }
.ml-auto { margin-left: auto; }
.ms-1 { margin-left: 0.25rem; }
.ms-2 { margin-left: 0.5rem; }
.ms-3 { margin-left: 0.75rem; }
.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 0.75rem; }

.pt-4 { padding-top: 1rem; }
.pb-4 { padding-bottom: 1rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.5rem; }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.rounded { border-radius: var(--border-radius); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.rounded-full { border-radius: 50%; }

.shadow { box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1); }
.shadow-md { box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); }
.shadow-lg { box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1); }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.cursor-pointer { cursor: pointer; }

/* Grid */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: -0.75rem;
}

.row > * {
    padding: 0.75rem;
}

.col {
    padding: 0.75rem;
}

.col-12 { width: 100%; padding: 0.75rem; }
.col-6 { width: 50%; padding: 0.75rem; }
.col-4 { width: 33.333%; padding: 0.75rem; }
.col-3 { width: 25%; padding: 0.75rem; }
.col-8 { width: 66.666%; padding: 0.75rem; }
.col-9 { width: 75%; padding: 0.75rem; }
.col-2 { width: 16.666%; padding: 0.75rem; }

/* ================================================================
   ANIMATIONS
   ================================================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.4s ease;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

.animate-bounce {
    animation: bounce 1s infinite;
}

/* Staggered animation for cards */
.stagger-item {
    opacity: 0;
    animation: fadeInUp 0.4s ease forwards;
}

.stagger-item:nth-child(1) { animation-delay: 0.1s; }
.stagger-item:nth-child(2) { animation-delay: 0.2s; }
.stagger-item:nth-child(3) { animation-delay: 0.3s; }
.stagger-item:nth-child(4) { animation-delay: 0.4s; }
.stagger-item:nth-child(5) { animation-delay: 0.5s; }
.stagger-item:nth-child(6) { animation-delay: 0.6s; }

/* ================================================================
   RESPONSIVE
   ================================================================ */

/* ================================================================
   GRID SYSTEM - Bootstrap-like
   ================================================================ */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-left: -0.75rem;
    margin-right: -0.75rem;
}

.row > * {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
}

/* Columns */
.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%; }

/* MD Breakpoint columns */
.col-md-1, .col-md-2, .col-md-3, .col-md-4, .col-md-5, .col-md-6,
.col-md-7, .col-md-8, .col-md-9, .col-md-10, .col-md-11, .col-md-12 {
    flex: 0 0 auto;
    width: 100%;
}

/* LG Breakpoint columns */
.col-lg-1, .col-lg-2, .col-lg-3, .col-lg-4, .col-lg-5, .col-lg-6,
.col-lg-7, .col-lg-8, .col-lg-9, .col-lg-10, .col-lg-11, .col-lg-12 {
    flex: 0 0 auto;
    width: 100%;
}

/* Gap utilities */
.g-0 { --bs-gutter-x: 0; --bs-gutter-y: 0; }
.g-1 { --bs-gutter-x: 0.25rem; --bs-gutter-y: 0.25rem; }
.g-2 { --bs-gutter-x: 0.5rem; --bs-gutter-y: 0.5rem; }
.g-3 { --bs-gutter-x: 1rem; --bs-gutter-y: 1rem; }
.g-4 { --bs-gutter-x: 1.5rem; --bs-gutter-y: 1.5rem; }

.row.g-3 { margin-left: -0.5rem; margin-right: -0.5rem; }
.row.g-3 > * { padding-left: 0.5rem; padding-right: 0.5rem; margin-bottom: 1rem; }

/* Flex utilities */
.d-flex { display: flex !important; }
.d-none { display: none !important; }
.d-block { display: block !important; }
.flex-wrap { flex-wrap: wrap !important; }
.flex-column { flex-direction: column !important; }
.align-items-start { align-items: flex-start !important; }
.align-items-center { align-items: center !important; }
.align-items-end { align-items: flex-end !important; }
.justify-content-start { justify-content: flex-start !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-end { justify-content: flex-end !important; }
.justify-content-between { justify-content: space-between !important; }

/* Spacing utilities */
.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mb-5 { margin-bottom: 3rem !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: 0.25rem !important; }
.mt-2 { margin-top: 0.5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.mt-5 { margin-top: 3rem !important; }

.me-1 { margin-right: 0.25rem !important; }
.me-2 { margin-right: 0.5rem !important; }
.me-3 { margin-right: 1rem !important; }
.ms-1 { margin-left: 0.25rem !important; }
.ms-2 { margin-left: 0.5rem !important; }
.ms-3 { margin-left: 1rem !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: 0.25rem !important; }
.p-2 { padding: 0.5rem !important; }
.p-3 { padding: 1rem !important; }
.p-4 { padding: 1.5rem !important; }

/* Text utilities */
.text-center { text-align: center !important; }
.text-end, .text-right { text-align: right !important; }
.text-start, .text-left { text-align: left !important; }
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-warning { color: var(--warning) !important; }
.text-muted { color: var(--gray-500) !important; }

.font-medium { font-weight: 500 !important; }
.font-semibold { font-weight: 600 !important; }
.font-bold { font-weight: 700 !important; }

/* Width utilities */
.w-100 { width: 100% !important; }
.w-auto { width: auto !important; }


/* ================================================================
   RESPONSIVE BREAKPOINTS
   ================================================================ */

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .col-md-1 { width: 8.333333%; }
    .col-md-2 { width: 16.666667%; }
    .col-md-3 { width: 25%; }
    .col-md-4 { width: 33.333333%; }
    .col-md-5 { width: 41.666667%; }
    .col-md-6 { width: 50%; }
    .col-md-7 { width: 58.333333%; }
    .col-md-8 { width: 66.666667%; }
    .col-md-9 { width: 75%; }
    .col-md-10 { width: 83.333333%; }
    .col-md-11 { width: 91.666667%; }
    .col-md-12 { width: 100%; }
    
    .d-md-none { display: none !important; }
    .d-md-block { display: block !important; }
    .d-md-flex { display: flex !important; }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
    .col-lg-1 { width: 8.333333%; }
    .col-lg-2 { width: 16.666667%; }
    .col-lg-3 { width: 25%; }
    .col-lg-4 { width: 33.333333%; }
    .col-lg-5 { width: 41.666667%; }
    .col-lg-6 { width: 50%; }
    .col-lg-7 { width: 58.333333%; }
    .col-lg-8 { width: 66.666667%; }
    .col-lg-9 { width: 75%; }
    .col-lg-10 { width: 83.333333%; }
    .col-lg-11 { width: 91.666667%; }
    .col-lg-12 { width: 100%; }
    
    .d-lg-none { display: none !important; }
    .d-lg-block { display: block !important; }
    .d-lg-flex { display: flex !important; }
}

/* Small devices (landscape phones, less than 768px) */
@media (max-width: 767.98px) {
    .col-1, .col-2, .col-3, .col-4, .col-5, .col-6,
    .col-7, .col-8, .col-9, .col-10, .col-11 {
        width: 100%;
    }
    
    .row {
        margin-left: -0.5rem;
        margin-right: -0.5rem;
    }
    
    .row > * {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
        margin-bottom: 1rem;
    }
    
    .stat-card {
        flex-direction: row;
        text-align: left;
    }
    
    .stat-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }
    
    .stat-value {
        font-size: 1.25rem;
    }
    
    /* Hide columns on mobile table */
    .table th:nth-child(3),
    .table td:nth-child(3),
    .table th:nth-child(4),
    .table td:nth-child(4),
    .table th:nth-child(5),
    .table td:nth-child(5) {
        display: none;
    }
    
    .glass-card {
        padding: 1rem;
    }
    
    .btn-group {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .btn-group .btn {
        width: 100%;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 1rem;
    }
    
    .page-actions {
        width: 100%;
    }
    
    .page-actions .btn {
        width: 100%;
    }
}

/* Extra small devices */
@media (max-width: 575.98px) {
    .content-wrapper {
        padding: 0.75rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .stat-value {
        font-size: 1.1rem;
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    .btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
    }
}


@media print {
    .sidebar,
    .header,
    .btn,
    .no-print {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .content-wrapper {
        margin-top: 0 !important;
        padding: 0 !important;
    }
    
    .glass-card,
    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
    
    body {
        background: white !important;
    }
}