/*
TPS Customer Management System - Modern UI Stylesheet

A sophisticated, modern design system with beautiful colors, smooth animations,
and responsive layouts. Built with CSS Grid, Flexbox, and modern browser features.
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Modern Color Palette - Deep Ocean Theme */
    --primary-50: #eff8ff;
    --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;
    
    /* Accent Colors */
    --accent-50: #f0f9ff;
    --accent-100: #e0f2fe;
    --accent-200: #bae6fd;
    --accent-300: #7dd3fc;
    --accent-400: #38bdf8;
    --accent-500: #0ea5e9;
    --accent-600: #0284c7;
    --accent-700: #0369a1;
    --accent-800: #075985;
    --accent-900: #0c4a6e;
    
    /* Success Colors */
    --success-50: #ecfdf5;
    --success-100: #d1fae5;
    --success-200: #a7f3d0;
    --success-300: #6ee7b7;
    --success-400: #34d399;
    --success-500: #10b981;
    --success-600: #059669;
    --success-700: #047857;
    --success-800: #065f46;
    --success-900: #064e3b;
    
    /* Warning Colors */
    --warning-50: #fffbeb;
    --warning-100: #fef3c7;
    --warning-200: #fde68a;
    --warning-300: #fcd34d;
    --warning-400: #fbbf24;
    --warning-500: #f59e0b;
    --warning-600: #d97706;
    --warning-700: #b45309;
    --warning-800: #92400e;
    --warning-900: #78350f;
    
    /* Error Colors */
    --error-50: #fef2f2;
    --error-100: #fee2e2;
    --error-200: #fecaca;
    --error-300: #fca5a5;
    --error-400: #f87171;
    --error-500: #ef4444;
    --error-600: #dc2626;
    --error-700: #b91c1c;
    --error-800: #991b1b;
    --error-900: #7f1d1d;
    
    /* Neutral Colors - Warm Gray (Light Mode) */
    --gray-50: #fafaf9;
    --gray-100: #f5f5f4;
    --gray-200: #e7e5e4;
    --gray-300: #d6d3d1;
    --gray-400: #a8a29e;
    --gray-500: #78716c;
    --gray-600: #57534e;
    --gray-700: #44403c;
    --gray-800: #292524;
    --gray-900: #1c1917;
    
    /* Background Gradients */
    --bg-gradient-primary: linear-gradient(135deg, var(--primary-50) 0%, var(--accent-50) 100%);
    --bg-gradient-dark: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    --bg-gradient-card: linear-gradient(145deg, #ffffff 0%, #fafafa 100%);
    
    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Monaco', 'Menlo', monospace;
    
    /* Spacing Scale */
    --spacing-px: 1px;
    --spacing-0: 0;
    --spacing-1: 0.25rem;    /* 4px */
    --spacing-2: 0.5rem;     /* 8px */
    --spacing-3: 0.75rem;    /* 12px */
    --spacing-4: 1rem;       /* 16px */
    --spacing-5: 1.25rem;    /* 20px */
    --spacing-6: 1.5rem;     /* 24px */
    --spacing-8: 2rem;       /* 32px */
    --spacing-10: 2.5rem;    /* 40px */
    --spacing-12: 3rem;      /* 48px */
    --spacing-16: 4rem;      /* 64px */
    --spacing-20: 5rem;      /* 80px */
    
    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 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);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

/* Dark Mode Color Palette */
[data-theme="dark"] {
    /* Dark Mode Neutral Colors */
    --gray-50: #18181b;
    --gray-100: #27272a;
    --gray-200: #3f3f46;
    --gray-300: #52525b;
    --gray-400: #71717a;
    --gray-500: #a1a1aa;
    --gray-600: #d4d4d8;
    --gray-700: #e4e4e7;
    --gray-800: #f4f4f5;
    --gray-900: #fafafa;
    
    /* Dark Mode Backgrounds */
    --bg-gradient-primary: linear-gradient(135deg, #18181b 0%, #27272a 100%);
    --bg-gradient-dark: linear-gradient(135deg, #09090b 0%, #18181b 100%);
    --bg-gradient-card: linear-gradient(145deg, #27272a 0%, #2d2d31 100%);
    
    /* Adjusted shadows for dark mode */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5), 0 4px 6px -4px rgb(0 0 0 / 0.5);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.6), 0 8px 10px -6px rgb(0 0 0 / 0.6);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.7);
    --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.3);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
}

/* Dark mode specific adjustments */
[data-theme="dark"] body {
    background: var(--bg-gradient-primary);
    color: var(--gray-900);
}

[data-theme="dark"] .header {
    background: rgba(39, 39, 42, 0.95);
    border-bottom-color: var(--gray-200);
}

[data-theme="dark"] .sidebar {
    background: rgba(39, 39, 42, 0.98);
    border-right-color: var(--gray-200);
}

[data-theme="dark"] .card {
    background: var(--bg-gradient-card);
    border-color: var(--gray-200);
}

[data-theme="dark"] .card__header {
    background: rgba(39, 39, 42, 0.8);
    border-bottom-color: var(--gray-200);
}

[data-theme="dark"] .card__footer {
    background: var(--gray-100);
    border-top-color: var(--gray-200);
}

[data-theme="dark"] .form__input,
[data-theme="dark"] .form__select,
[data-theme="dark"] .form__textarea {
    background: var(--gray-100);
    border-color: var(--gray-200);
    color: var(--gray-900);
}

[data-theme="dark"] .form__input:focus,
[data-theme="dark"] .form__select:focus,
[data-theme="dark"] .form__textarea:focus {
    background: var(--gray-100);
    border-color: var(--primary-500);
}

[data-theme="dark"] .table-container {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

[data-theme="dark"] .table__header {
    background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-300) 100%);
}

[data-theme="dark"] .table__header th {
    color: var(--gray-900);
    border-bottom-color: var(--gray-300);
}

[data-theme="dark"] .table__row {
    border-bottom-color: var(--gray-200);
}

[data-theme="dark"] .table__row:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(14, 165, 233, 0.1) 100%);
}

[data-theme="dark"] .btn--secondary {
    background: var(--gray-200);
    color: var(--gray-900);
    border-color: var(--gray-300);
}

[data-theme="dark"] .btn--secondary:hover {
    background: var(--gray-300);
    border-color: var(--gray-400);
}

[data-theme="dark"] .sidebar__nav-link {
    color: var(--gray-700);
}

[data-theme="dark"] .sidebar__nav-link:hover,
[data-theme="dark"] .sidebar__nav-link--active {
    color: var(--primary-400);
}

[data-theme="dark"] .sidebar__nav-link::before {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(14, 165, 233, 0.15) 100%);
}

[data-theme="dark"] .sidebar__subnav-link {
    background: var(--gray-100);
    border-color: var(--gray-200);
    color: var(--gray-600);
}

[data-theme="dark"] .sidebar__subnav-link:hover,
[data-theme="dark"] .sidebar__subnav-link--active {
    color: var(--primary-400);
    border-color: var(--primary-300);
}

[data-theme="dark"] .sidebar__subnav-link::before {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(14, 165, 233, 0.2) 100%);
}

[data-theme="dark"] .page-header {
    border-bottom-color: var(--gray-200);
}

[data-theme="dark"] .stat-card {
    background: var(--bg-gradient-card);
}

[data-theme="dark"] .mobile-menu-toggle:hover {
    background: var(--gray-200);
    color: var(--gray-900);
}

[data-theme="dark"] .sidebar-edge-toggle {
    background: var(--gray-100);
    border-color: var(--gray-200);
    color: var(--gray-700);
}

[data-theme="dark"] .modal__dialog {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

[data-theme="dark"] .modal__header,
[data-theme="dark"] .modal__footer {
    background: rgba(39, 39, 42, 0.9);
    border-color: var(--gray-200);
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--gray-200);
}

[data-theme="dark"] .form-control {
    background: var(--gray-100);
    border-color: var(--gray-200);
    color: var(--gray-900);
}

[data-theme="dark"] .form-control:focus {
    background: var(--gray-100);
    border-color: var(--primary-500);
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    line-height: 1.6;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    background: var(--bg-gradient-primary);
    color: var(--gray-900);
    min-height: 100vh;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

/* Layout System */
.layout {
    display: grid;
    grid-template-areas: 
        "header header"
        "sidebar main";
    grid-template-columns: 280px 1fr;
    grid-template-rows: auto 1fr;
    min-height: 100vh;
    background: var(--bg-gradient-primary);
}

/* Collapsed sidebar (desktop) */
.sidebar-collapsed .layout {
    grid-template-columns: 0 1fr;
}

.layout--no-sidebar {
    grid-template-areas: 
        "header header"
        "main main";
    grid-template-columns: 1fr;
}

/* Header */
.header {
    grid-area: header;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-3) var(--spacing-4);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.header__left {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--gray-600);
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    z-index: var(--z-header);
    position: relative;
    min-width: 44px;
    min-height: 44px;
    touch-action: manipulation;
}

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

.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.mobile-menu-overlay--open {
    display: block;
    opacity: 1;
}

.header__brand {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--accent-600) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    transition: transform var(--transition-fast);
}

.header__brand:hover {
    transform: scale(1.02);
}

.header__brand::before {
    content: "📡";
    font-size: 1.25rem;
}

.header__nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.header__user {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    color: var(--gray-600);
    font-weight: 500;
}

.header__avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-500) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-md);
}

/* Sidebar */
.sidebar {
    grid-area: sidebar;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--gray-200);
    padding: var(--spacing-4);
    overflow-y: auto;
    transition: transform var(--transition-normal);
}

/* Edge toggle visibility on desktop */
@media (min-width: 1025px) {
    .sidebar-edge-toggle { display: flex; }
    body.sidebar-collapsed .sidebar-edge-toggle { left: 8px; }
    body:not(.sidebar-collapsed) .sidebar-edge-toggle { left: 252px; }
}

/* Edge toggle base styles */
.sidebar-edge-toggle {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1060;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 48px;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    background: #ffffff;
    box-shadow: 0 4px 10px rgba(0,0,0,.08);
    color: #374151;
    cursor: pointer;
}

/* Slide the sidebar out on desktop when collapsed */
@media (min-width: 1025px) {
    .sidebar-collapsed .sidebar {
        transform: translateX(-100%);
    }
}

/* Mobile sidebar styles */
@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 280px;
        z-index: var(--z-modal);
        transform: translateX(-100%);
        box-shadow: var(--shadow-xl);
        transition: transform var(--transition-normal);
    }
    
    .sidebar--open {
        transform: translateX(0);
    }
    
    .mobile-menu-toggle {
        display: block !important;
        visibility: visible;
        opacity: 1;
    }
    
    .mobile-menu-open {
        overflow: hidden;
    }
    
    .mobile-menu-open body {
        overflow: hidden;
    }
}

.sidebar__nav {
    list-style: none;
}

.sidebar__nav-item {
    margin-bottom: var(--spacing-2);
}

.sidebar__nav-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-2) var(--spacing-3);
    color: var(--gray-700);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-weight: 500;
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
}

.sidebar__nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--accent-50) 100%);
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: -1;
}

.sidebar__nav-link:hover::before,
.sidebar__nav-link--active::before {
    opacity: 1;
}

.sidebar__nav-link:hover,
.sidebar__nav-link--active {
    color: var(--primary-700);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.sidebar__nav-icon {
    width: 1.25rem;
    height: 1.25rem;
    margin-right: var(--spacing-3);
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.sidebar__nav-link:hover .sidebar__nav-icon,
.sidebar__nav-link--active .sidebar__nav-icon {
    opacity: 1;
}

/* Parent nav link styling */
.sidebar__nav-link--parent {
    cursor: default;
    font-weight: 600;
    color: var(--gray-800);
}

.sidebar__nav-link--parent:hover {
    transform: none;
    box-shadow: none;
}

/* Submenu styling */
.sidebar__subnav {
    list-style: none;
    margin: var(--spacing-2) 0 0 var(--spacing-6);
    padding: 0;
}

/* Collapsible submenu behavior */
.sidebar__subnav { display: none; }
.sidebar__subnav.sidebar__subnav--open { display: block; }

.sidebar__subnav-item {
    margin-bottom: var(--spacing-1);
}

.sidebar__subnav-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-2) var(--spacing-3);
    color: var(--gray-600);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-weight: 500;
    font-size: 0.8rem;
    position: relative;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    margin-bottom: var(--spacing-1);
}

.sidebar__subnav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--accent-100) 100%);
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: -1;
    border-radius: var(--radius-md);
}

.sidebar__subnav-link:hover::before,
.sidebar__subnav-link--active::before {
    opacity: 1;
}

.sidebar__subnav-link:hover,
.sidebar__subnav-link--active {
    color: var(--primary-700);
    transform: translateX(2px);
    box-shadow: var(--shadow-sm);
    border-color: var(--primary-200);
}

.sidebar__subnav-icon {
    width: 1rem;
    height: 1rem;
    margin-right: var(--spacing-2);
    opacity: 0.7;
    transition: opacity var(--transition-fast);
    flex-shrink: 0;
}

.sidebar__subnav-link:hover .sidebar__subnav-icon,
.sidebar__subnav-link--active .sidebar__subnav-icon {
    opacity: 1;
}

/* Main Content */
.main {
    grid-area: main;
    padding: var(--spacing-5);
    overflow-y: auto;
    background: transparent;
}

.main--centered {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-12);
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-8);
    padding-bottom: var(--spacing-6);
    border-bottom: 2px solid var(--gray-200);
    position: relative;
}

.page-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-500) 0%, var(--accent-500) 100%);
    border-radius: var(--radius-full);
}

.page-header__title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--spacing-2);
    line-height: 1.2;
}

.page-header__subtitle {
    color: var(--gray-600);
    font-size: 1.125rem;
    font-weight: 400;
}

.page-header__actions {
    margin-top: var(--spacing-6);
    display: flex;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}

/* Cards */
.card {
    background: var(--bg-gradient-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    transition: all var(--transition-normal);
    position: relative;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-500) 0%, var(--accent-500) 100%);
}

.card__header {
    padding: var(--spacing-4);
    border-bottom: 1px solid var(--gray-200);
    background: rgba(255, 255, 255, 0.8);
}

.card__title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-1);
}

.card__subtitle {
    color: var(--gray-600);
    font-size: 0.875rem;
}

.card__content {
    padding: var(--spacing-4);
}

.card__footer {
    padding: var(--spacing-4);
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
}

/* Modern Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2) var(--spacing-4);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    gap: var(--spacing-1);
    position: relative;
    overflow: hidden;
    outline: none;
    min-height: 2rem;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s;
}

.btn:hover::before {
    left: 100%;
}

.btn:focus {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.btn:active {
    transform: scale(0.98);
}

.btn--primary {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn--primary:hover {
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-800) 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.btn--secondary {
    background: white;
    color: var(--gray-700);
    border-color: var(--gray-300);
    box-shadow: var(--shadow-sm);
}

.btn--secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
    transform: translateY(-1px);
}

.btn--success {
    background: linear-gradient(135deg, var(--success-500) 0%, var(--success-600) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn--warning {
    background: linear-gradient(135deg, var(--warning-500) 0%, var(--warning-600) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn--error {
    background: linear-gradient(135deg, var(--error-500) 0%, var(--error-600) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn--sm {
    padding: var(--spacing-1) var(--spacing-3);
    font-size: 0.6875rem;
    min-height: 1.5rem;
    gap: var(--spacing-1);
}

.btn--lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: 1rem;
    min-height: 3rem;
}

.btn--icon-only {
    width: 2.5rem;
    padding: var(--spacing-3);
}

.btn__icon {
    width: 1rem;
    height: 1rem;
    margin-right: var(--spacing-2);
    flex-shrink: 0;
}

/* Ensure SVG icons inside buttons render with a sensible size
   even when .btn__icon class is not present */
.btn svg {
    width: 1rem;
    height: 1rem;
}

.btn--icon-only .btn__icon {
    margin-right: 0;
}

/* Loading State */
.btn--loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn--loading::after {
    content: '';
    position: absolute;
    width: 1rem;
    height: 1rem;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

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

/* Forms */
.form {
    max-width: 800px;
}

.form__group {
    margin-bottom: var(--spacing-6);
    position: relative;
}

.form__label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.875rem;
}

.form__label--required::after {
    content: " *";
    color: var(--error-500);
}

.form__input,
.form__select,
.form__textarea {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    background: white;
    outline: none;
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    transform: translateY(-1px);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

.form__help {
    margin-top: var(--spacing-2);
    font-size: 0.75rem;
    color: var(--gray-500);
}

.form__error {
    margin-top: var(--spacing-2);
    font-size: 0.75rem;
    color: var(--error-600);
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.form__error::before {
    content: '⚠️';
}

.form__actions {
    display: flex;
    gap: var(--spacing-3);
    justify-content: flex-end;
    margin-top: var(--spacing-8);
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--gray-200);
}

/* Modern Tables */
.table-container {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table__header {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
}

.table__header th {
    padding: var(--spacing-4) var(--spacing-6);
    text-align: left;
    font-weight: 700;
    color: var(--gray-800);
    border-bottom: 2px solid var(--gray-200);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.table__row {
    transition: all var(--transition-fast);
    border-bottom: 1px solid var(--gray-100);
}

.table__row:hover {
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--accent-50) 100%);
}

.table__cell {
    padding: var(--spacing-4) var(--spacing-6);
    vertical-align: top;
    font-size: 0.875rem;
}

.table__actions {
    white-space: nowrap;
}

.table__actions .btn {
    margin-right: var(--spacing-2);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    border: 1px solid transparent;
}

.badge--success {
    background: linear-gradient(135deg, var(--success-100) 0%, var(--success-200) 100%);
    color: var(--success-800);
    border-color: var(--success-300);
}

.badge--warning {
    background: linear-gradient(135deg, var(--warning-100) 0%, var(--warning-200) 100%);
    color: var(--warning-800);
    border-color: var(--warning-300);
}

.badge--error {
    background: linear-gradient(135deg, var(--error-100) 0%, var(--error-200) 100%);
    color: var(--error-800);
    border-color: var(--error-300);
}

.badge--info {
    background: linear-gradient(135deg, var(--accent-100) 0%, var(--accent-200) 100%);
    color: var(--accent-800);
    border-color: var(--accent-300);
}

.badge--secondary {
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
    color: var(--gray-700);
    border-color: var(--gray-300);
}

/* Modern Alerts */
.alert {
    padding: var(--spacing-4) var(--spacing-6);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-6);
    border-left: 4px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    animation: slideInDown 0.3s ease-out;
    box-shadow: var(--shadow-md);
}

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

.alert--success {
    background: linear-gradient(135deg, var(--success-50) 0%, var(--success-100) 100%);
    border-color: var(--success-500);
    color: var(--success-800);
}

.alert--warning {
    background: linear-gradient(135deg, var(--warning-50) 0%, var(--warning-100) 100%);
    border-color: var(--warning-500);
    color: var(--warning-800);
}

.alert--error {
    background: linear-gradient(135deg, var(--error-50) 0%, var(--error-100) 100%);
    border-color: var(--error-500);
    color: var(--error-800);
}

.alert--info {
    background: linear-gradient(135deg, var(--accent-50) 0%, var(--accent-100) 100%);
    border-color: var(--accent-500);
    color: var(--accent-800);
}

.alert__icon {
    font-size: 1.25rem;
    margin-top: var(--spacing-1);
}

.alert__content {
    flex: 1;
    font-weight: 500;
}

.alert__close {
    background: none;
    border: none;
    color: currentColor;
    cursor: pointer;
    padding: var(--spacing-1);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.alert__close:hover {
    background: rgba(0, 0, 0, 0.1);
}

/* Dashboard Stats */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

.stat-card {
    background: var(--bg-gradient-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary-500);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    transform: translate(30px, -30px);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stat-card__title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: var(--spacing-2);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.stat-card__value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1;
    margin-bottom: var(--spacing-2);
}

.stat-card__change {
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.stat-card--warning {
    border-left-color: var(--warning-500);
}

.stat-card--success {
    border-left-color: var(--success-500);
}

.stat-card--error {
    border-left-color: var(--error-500);
}

/* Loading States */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 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);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    width: 3rem;
    height: 3rem;
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary-500);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .layout {
        grid-template-areas: 
            "header"
            "main";
        grid-template-columns: 1fr;
        min-height: 100vh;
        overflow-x: hidden;
    }
    
    .sidebar {
        display: block; /* Keep sidebar for mobile menu */
    }
    
    .main {
        padding: var(--spacing-6);
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }
    
    .page-header__title {
        font-size: 2rem;
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: var(--spacing-4);
    }
    
    /* Ensure proper mobile scrolling */
    body {
        overflow-x: hidden;
        -webkit-overflow-scrolling: touch;
    }
    
    .main {
        -webkit-overflow-scrolling: touch;
    }
}

@media (max-width: 768px) {
    .header {
        padding: var(--spacing-3) var(--spacing-4);
        position: sticky;
        top: 0;
        z-index: var(--z-header);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
    }
    
    .header__brand {
        font-size: 1.25rem;
    }
    
    .main {
        padding: var(--spacing-4);
        width: 100%;
        max-width: 100vw;
        overflow-x: hidden;
    }
    
    .page-header__title {
        font-size: 1.75rem;
    }
    
    .form__actions {
        flex-direction: column;
    }
    
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        width: 100%;
    }
    
    .card {
        border-radius: var(--radius-lg);
        width: 100%;
        max-width: 100%;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    /* Improve mobile scrolling performance */
    * {
        -webkit-overflow-scrolling: touch;
    }
    
    /* Prevent horizontal scroll on mobile */
    html, body {
        overflow-x: hidden;
        width: 100%;
        max-width: 100vw;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }

.text-gray-500 { color: var(--gray-500); }
.text-gray-600 { color: var(--gray-600); }
.text-gray-700 { color: var(--gray-700); }
.text-primary { color: var(--primary-600); }

.opacity-50 { opacity: 0.5; }
.opacity-60 { opacity: 0.6; }
.opacity-75 { opacity: 0.75; }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

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

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

.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }
.gap-8 { gap: var(--spacing-8); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--spacing-2); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }

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

/* Image Handling */
img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

/* Rich text content (What's New, etc.) */
.prose {
    line-height: 1.6;
}
.prose p { margin: 0.5rem 0; }
.prose ul { list-style: disc; padding-left: 1.5rem; margin: 0.5rem 0; }
.prose ol { list-style: decimal; padding-left: 1.5rem; margin: 0.5rem 0; }
.prose li { margin: 0.25rem 0; }
.prose h3 { font-size: 1.1rem; margin: 0.75rem 0 0.5rem 0; }
.prose a { color: var(--primary-600); text-decoration: underline; }
.prose strong { font-weight: 600; }
.prose em { font-style: italic; }
.prose hr { border: 0; border-top: 1px solid var(--gray-200); margin: 1rem 0; }

/* Specific image size controls */
.file-preview-image {
    max-width: 150px !important;
    max-height: 150px !important;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.thumbnail {
    max-width: 80px;
    max-height: 80px;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.thumbnail-sm {
    max-width: 50px;
    max-height: 50px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.image-preview {
    max-width: 200px;
    max-height: 200px;
    object-fit: contain;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.avatar-image {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: var(--radius-full);
}

/* Document preview images */
.document-preview img {
    max-width: 120px;
    max-height: 120px;
    object-fit: cover;
    border-radius: var(--radius-md);
}

/* Icon sizing */
svg, .icon {
    flex-shrink: 0;
}

.w-4 { width: 1rem; height: 1rem; }
.w-5 { width: 1.25rem; height: 1.25rem; }
.w-6 { width: 1.5rem; height: 1.5rem; }
.w-12 { width: 3rem; height: 3rem; }
.w-16 { width: 4rem; height: 4rem; }

.h-4 { height: 1rem; }
.h-5 { height: 1.25rem; }
.h-6 { height: 1.5rem; }
.h-12 { height: 3rem; }
.h-16 { height: 4rem; }

/* Compact Form Styles */
.form-group {
    margin-bottom: var(--spacing-3);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-1);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--gray-700);
}

.form-control {
    width: 100%;
    padding: var(--spacing-2) var(--spacing-3);
    font-size: 0.875rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    background: white;
    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-help {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: var(--spacing-1);
}

.form-checkbox {
    margin-right: var(--spacing-2);
}

.form-checkbox-label {
    font-size: 0.875rem;
    color: var(--gray-700);
    margin-bottom: 0;
}

/* Compact Spacing Utilities */
.space-y-6 > * + * { margin-top: var(--spacing-4); }
.space-y-4 > * + * { margin-top: var(--spacing-3); }
.space-y-3 > * + * { margin-top: var(--spacing-2); }

/* Compact Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-4);
}

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

/* Modal (global) */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex; /* use flex but hide via visibility to prevent layout jumps */
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.45);
    z-index: var(--z-modal);
    padding: var(--spacing-6);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.modal--open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.modal__dialog {
    background: #ffffff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    border: 1px solid var(--gray-200);
    max-width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal__header, .modal__footer {
    background: rgba(255, 255, 255, 0.9);
    padding: var(--spacing-4);
    border-bottom: 1px solid var(--gray-200);
}

.modal__footer { border-top: 1px solid var(--gray-200); border-bottom: 0; }

.modal__body { padding: var(--spacing-4); }

/* Ticket Modals - Modern Styling */
.ticket-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: var(--z-modal);
    padding: var(--spacing-6);
    animation: fadeIn var(--transition-normal);
}

.ticket-modal[style*="display: flex"],
.ticket-modal[style*="display:flex"] {
    display: flex !important;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.ticket-modal__dialog {
    background: linear-gradient(145deg, #ffffff 0%, #fafafa 100%);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    border: 1px solid var(--gray-200);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp var(--transition-normal);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.ticket-modal__header {
    padding: var(--spacing-6);
    border-bottom: 2px solid var(--gray-200);
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--accent-50) 100%);
}

.ticket-modal__title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--accent-700) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ticket-modal__body {
    padding: var(--spacing-6);
    overflow-y: auto;
    flex: 1;
}

.ticket-modal__footer {
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-3);
}

/* Dark Mode for All Modals */
[data-theme="dark"] .modal {
    background: rgba(0, 0, 0, 0.75);
}

[data-theme="dark"] .modal__dialog {
    background: linear-gradient(145deg, var(--gray-100) 0%, var(--gray-200) 100%);
    border-color: var(--gray-300);
}

[data-theme="dark"] .modal__header,
[data-theme="dark"] .modal__footer {
    background: rgba(39, 39, 42, 0.95);
    border-color: var(--gray-300);
}

[data-theme="dark"] .modal__body {
    background: var(--gray-100);
}

/* Dark Mode for Ticket Modals */
[data-theme="dark"] .ticket-modal {
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
}

[data-theme="dark"] .ticket-modal__dialog {
    background: linear-gradient(145deg, #27272a 0%, #2d2d31 100%);
    border-color: var(--gray-300);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.9);
}

[data-theme="dark"] .ticket-modal__header {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(14, 165, 233, 0.15) 100%);
    border-bottom-color: var(--gray-300);
}

[data-theme="dark"] .ticket-modal__title {
    color: var(--gray-900);
    background: linear-gradient(135deg, var(--primary-400) 0%, var(--accent-400) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="dark"] .ticket-modal__body {
    background: transparent;
}

[data-theme="dark"] .ticket-modal__footer {
    background: rgba(39, 39, 42, 0.8);
    border-top-color: var(--gray-300);
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-400) 0%, var(--accent-400) 100%);
    border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-500) 100%);
}

/* Additional Components for Ticket System */

/* Table Actions */
.table-actions {
    display: flex;
    gap: var(--spacing-1);
    align-items: center;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-8) var(--spacing-4);
}

.empty-state__icon {
    width: 4rem;
    height: 4rem;
    color: var(--gray-400);
    margin: 0 auto var(--spacing-4);
    display: block;
}

.empty-state__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-2);
}

.empty-state__text {
    color: var(--gray-500);
    margin-bottom: var(--spacing-6);
}

/* Badge Variants */
.badge--small {
    font-size: 0.625rem;
    padding: var(--spacing-1) var(--spacing-2);
}

.badge--success {
    background-color: var(--success-500);
    color: white;
}

.badge--warning {
    background-color: var(--warning-500);
    color: white;
}

.badge--secondary {
    background-color: var(--gray-500);
    color: white;
}

/* Calendar shared badges */
.badge-tk {
    background: #dcfce7;
    color: #065f46;
    border: 1px solid #86efac;
}
.badge-ev {
    background: #ede9fe;
    color: #5b21b6;
    border: 1px solid #c4b5fd;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-8);
    padding-bottom: var(--spacing-6);
    border-bottom: 1px solid var(--gray-200);
}

.page-header__content {
    flex: 1;
}

.page-header__title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-2);
}

.page-header__subtitle {
    color: var(--gray-600);
    font-size: 1.125rem;
}

.page-header__actions {
    display: flex;
    gap: var(--spacing-3);
    align-items: center;
}

/* Form Layout */
.form__row {
    display: flex;
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-6);
}

.form__col {
    flex: 1;
}

.form__col--4 {
    flex: 0 0 33.333333%;
}

.form__col--6 {
    flex: 0 0 50%;
}

.form__col--8 {
    flex: 0 0 66.666667%;
}

.form__section {
    margin-bottom: var(--spacing-8);
    padding-bottom: var(--spacing-6);
    border-bottom: 1px solid var(--gray-200);
}

.form__section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.form__section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-4);
}

.form__label--required::after {
    content: ' *';
    color: var(--error-500);
}

.form__help {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: var(--spacing-1);
}

.form__checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.form__checkbox {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.form__checkbox input[type="checkbox"] {
    margin-right: var(--spacing-2);
}

.form__checkbox-text {
    font-size: 0.875rem;
    color: var(--gray-700);
}

/* Responsive Design */
@media (max-width: 768px) {
    .form__row {
        flex-direction: column;
        gap: var(--spacing-4);
    }
    
    .form__col {
        width: 100%;
    }
    
    .page-header {
        flex-direction: column;
        gap: var(--spacing-4);
        align-items: stretch;
    }
    
    .page-header__actions {
        justify-content: flex-start;
    }
    
    .form__checkbox-group {
        flex-direction: column;
        gap: var(--spacing-2);
    }
}

/* Focus Indicators */
.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
}

/* Smooth Transitions */
* {
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

/* Dark Mode Enhancements - Technician Chips & Dropdowns */
[data-theme="dark"] .chip {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(14, 165, 233, 0.2) 100%) !important;
    color: var(--primary-300) !important;
    border-color: var(--primary-500) !important;
}

[data-theme="dark"] .chip .chip-remove {
    color: var(--gray-500) !important;
}

[data-theme="dark"] .chip .chip-remove:hover {
    color: var(--gray-300) !important;
}

[data-theme="dark"] #assigneeControl {
    background: var(--gray-100) !important;
    border-color: var(--gray-200) !important;
}

[data-theme="dark"] #techDropdown {
    background: var(--gray-100) !important;
    border-color: var(--gray-300) !important;
    box-shadow: var(--shadow-xl);
}

[data-theme="dark"] #techDropdown .opt {
    color: var(--gray-800);
}

[data-theme="dark"] #techDropdown .opt:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(14, 165, 233, 0.15) 100%);
    color: var(--primary-400);
}

/* Dark Mode - Tag Input System */
[data-theme="dark"] .tag-input-container {
    background: transparent;
}

[data-theme="dark"] .tag-input {
    background: var(--gray-100);
    border-color: var(--gray-200);
    color: var(--gray-900);
}

[data-theme="dark"] .tag-input:focus {
    border-color: var(--primary-500);
    background: var(--gray-100);
}

[data-theme="dark"] .tag-chip {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(14, 165, 233, 0.2) 100%);
    color: var(--primary-300);
    border: 1px solid var(--primary-500);
}

[data-theme="dark"] .tag-remove {
    color: var(--gray-500);
}

[data-theme="dark"] .tag-remove:hover {
    color: var(--gray-300);
    background: rgba(255, 255, 255, 0.1);
}

/* Dark Mode - Enhanced Form Labels */
[data-theme="dark"] .form__label {
    color: var(--gray-700);
    font-weight: 600;
}

[data-theme="dark"] .form__help {
    color: var(--gray-500);
}

/* Dark Mode - Alert Messages */
[data-theme="dark"] .alert--success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(5, 150, 105, 0.15) 100%);
    border-color: var(--success-600);
    color: var(--success-300);
}

[data-theme="dark"] .alert--warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(217, 119, 6, 0.15) 100%);
    border-color: var(--warning-600);
    color: var(--warning-300);
}

[data-theme="dark"] .alert--error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.15) 0%, rgba(220, 38, 38, 0.15) 100%);
    border-color: var(--error-600);
    color: var(--error-300);
}

[data-theme="dark"] .alert--info {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.15) 0%, rgba(2, 132, 199, 0.15) 100%);
    border-color: var(--accent-600);
    color: var(--accent-300);
}

/* Dark Mode - Badge Enhancements */
[data-theme="dark"] .badge--success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(5, 150, 105, 0.2) 100%);
    color: var(--success-300);
    border-color: var(--success-600);
}

[data-theme="dark"] .badge--warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(217, 119, 6, 0.2) 100%);
    color: var(--warning-300);
    border-color: var(--warning-600);
}

[data-theme="dark"] .badge--error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, rgba(220, 38, 38, 0.2) 100%);
    color: var(--error-300);
    border-color: var(--error-600);
}

[data-theme="dark"] .badge--info {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.2) 0%, rgba(2, 132, 199, 0.2) 100%);
    color: var(--accent-300);
    border-color: var(--accent-600);
}

[data-theme="dark"] .badge--secondary {
    background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-300) 100%);
    color: var(--gray-700);
    border-color: var(--gray-400);
}

/* Dark Mode - Calendar Badges */
[data-theme="dark"] .badge-tk {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-300);
    border-color: var(--success-600);
}

[data-theme="dark"] .badge-ev {
    background: rgba(139, 92, 246, 0.2);
    color: #c4b5fd;
    border-color: #8b5cf6;
}

/* Dark Mode - Loading Overlay */
[data-theme="dark"] .loading-overlay {
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(8px);
}

[data-theme="dark"] .loading-spinner {
    border-color: var(--gray-300);
    border-top-color: var(--primary-500);
}

/* Dark Mode - Empty State */
[data-theme="dark"] .empty-state__icon {
    color: var(--gray-500);
}

[data-theme="dark"] .empty-state__title {
    color: var(--gray-700);
}

[data-theme="dark"] .empty-state__text {
    color: var(--gray-600);
}

/* Dark Mode - Stat Cards Enhanced */
[data-theme="dark"] .stat-card {
    background: linear-gradient(145deg, var(--gray-100) 0%, var(--gray-200) 100%);
    border-left-color: var(--primary-500);
    box-shadow: var(--shadow-xl);
}

[data-theme="dark"] .stat-card::before {
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
}

[data-theme="dark"] .stat-card__title {
    color: var(--gray-600);
}

[data-theme="dark"] .stat-card__value {
    color: var(--gray-900);
}

/* Dark Mode - Page Header Enhancements */
[data-theme="dark"] .page-header__title {
    color: var(--gray-900);
}

[data-theme="dark"] .page-header__subtitle {
    color: var(--gray-600);
}

/* Dark Mode - Prose Content */
[data-theme="dark"] .prose a {
    color: var(--primary-400);
}

[data-theme="dark"] .prose hr {
    border-top-color: var(--gray-300);
}

/* Dark Mode - Header Avatar */
[data-theme="dark"] .header__avatar {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--accent-600) 100%);
    box-shadow: var(--shadow-lg);
}

/* Dark Mode - Improved Accessibility Focus */
[data-theme="dark"] .btn:focus {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.4);
}

[data-theme="dark"] .form__input:focus,
[data-theme="dark"] .form__select:focus,
[data-theme="dark"] .form__textarea:focus {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

/* Dark Mode - Scrollbar Enhancement */
[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.5) 0%, rgba(14, 165, 233, 0.5) 100%);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.7) 0%, rgba(14, 165, 233, 0.7) 100%);
}

/* Ticket Notes Styling */
.notes-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.note-item {
    padding: var(--spacing-4);
    margin-bottom: var(--spacing-3);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    background: linear-gradient(145deg, #ffffff 0%, #fafafa 100%);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.note-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.note-item--internal {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    border-color: var(--success-400);
    box-shadow: 0 2px 4px rgba(16, 185, 129, 0.1);
}

.note-item__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2);
    gap: var(--spacing-3);
}

.note-item__meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    flex-wrap: wrap;
}

.note-item__author {
    font-weight: 600;
    color: var(--gray-900);
    font-size: 0.875rem;
}

.note-item__date {
    color: var(--gray-500);
    font-size: 0.8125rem;
}

.note-item__content {
    color: var(--gray-800);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Dark Mode - Ticket Notes */
[data-theme="dark"] .note-item {
    background: linear-gradient(145deg, var(--gray-100) 0%, var(--gray-200) 100%);
    border-color: var(--gray-300);
}

[data-theme="dark"] .note-item:hover {
    box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .note-item--internal {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(5, 150, 105, 0.15) 100%);
    border-color: var(--success-600);
    box-shadow: 0 2px 4px rgba(16, 185, 129, 0.2);
}

[data-theme="dark"] .note-item__author {
    color: var(--gray-800);
}

[data-theme="dark"] .note-item__date {
    color: var(--gray-600);
}

[data-theme="dark"] .note-item__content {
    color: var(--gray-700);
}

/* Dark Mode – Calendar Manage Events (List) */
[data-theme="dark"] .calendar-events-container .events-header {
    background: var(--bg-gradient-card);
    border-color: var(--gray-300);
    box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .calendar-events-container .events-header__content h2 {
    color: var(--gray-900);
}

[data-theme="dark"] .calendar-events-container .events-header__subtitle {
    color: var(--gray-600);
}

[data-theme="dark"] .calendar-events-container .filter-input,
[data-theme="dark"] .calendar-events-container .filter-select {
    background: var(--gray-100);
    border-color: var(--gray-300);
    color: var(--gray-800);
}

[data-theme="dark"] .calendar-events-container .filter-input::placeholder {
    color: var(--gray-500);
}

[data-theme="dark"] .calendar-events-container .filter-checkbox {
    color: var(--gray-700);
}

[data-theme="dark"] .calendar-events-container .active-chips .chip {
    background: linear-gradient(135deg, rgba(59,130,246,.2) 0%, rgba(14,165,233,.2) 100%);
    color: var(--primary-300);
    border-color: var(--primary-500);
}

/* Events list table */
[data-theme="dark"] .calendar-events-container .events-table__header,
[data-theme="dark"] .calendar-events-container .events-table__row {
    background: var(--bg-gradient-card);
    border-color: var(--gray-300);
}

[data-theme="dark"] .calendar-events-container .events-table__header {
    color: var(--gray-600);
    background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-300) 100%);
}

[data-theme="dark"] .calendar-events-container .cell-title .row-title {
    color: var(--gray-900);
}

[data-theme="dark"] .calendar-events-container .cell-title .row-sub {
    color: var(--gray-600);
}

/* Type and status badges */
[data-theme="dark"] .calendar-events-container .event-type-badge--general {
    background: var(--gray-200);
    color: var(--gray-800);
}

[data-theme="dark"] .calendar-events-container .event-type-badge--meeting {
    background: rgba(59,130,246,.2);
    color: var(--primary-300);
}

[data-theme="dark"] .calendar-events-container .event-type-badge--training {
    background: rgba(34,197,94,.2);
    color: #86efac;
}

[data-theme="dark"] .calendar-events-container .event-type-badge--maintenance {
    background: rgba(245,158,11,.2);
    color: #fcd34d;
}

[data-theme="dark"] .calendar-events-container .status-badge--scheduled {
    background: rgba(59,130,246,.18);
    color: var(--primary-300);
}

[data-theme="dark"] .calendar-events-container .status-badge--in_progress {
    background: rgba(245,158,11,.18);
    color: #fbbf24;
}

[data-theme="dark"] .calendar-events-container .status-badge--completed {
    background: rgba(34,197,94,.18);
    color: #86efac;
}

[data-theme="dark"] .calendar-events-container .status-badge--cancelled {
    background: rgba(239,68,68,.18);
    color: #fca5a5;
}

/* Empty state */
[data-theme="dark"] .calendar-events-container .empty-state {
    background: var(--bg-gradient-card);
    border-color: var(--gray-300);
}

[data-theme="dark"] .calendar-events-container .empty-state h3 {
    color: var(--gray-900);
}

[data-theme="dark"] .calendar-events-container .empty-state p {
    color: var(--gray-600);
}

/* Pagination */
[data-theme="dark"] .calendar-events-container .pagination__link {
    background: var(--gray-100);
    border-color: var(--gray-300);
    color: var(--gray-800);
}

[data-theme="dark"] .calendar-events-container .pagination__link:hover {
    background: var(--gray-200);
    border-color: var(--gray-400);
}

[data-theme="dark"] .calendar-events-container .pagination__info {
    color: var(--gray-600);
}

/* Subtle row hover */
[data-theme="dark"] .calendar-events-container .events-table__row:hover {
    box-shadow: var(--shadow-md);
}