/* ============================================
   CSTEM Task Portal - Modern Design System
   Version 3.0 - Premium Visual Experience
   ============================================ */

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

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', monospace;
    
    /* Color Palette - Modern & Clean */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    
    /* Brand Colors - Premium Blue */
    --color-primary: #3b82f6;
    --color-primary-light: #60a5fa;
    --color-primary-dark: #2563eb;
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    
    /* Accent Gradient */
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --gradient-hero: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 50%, #3b82f6 100%);
    --gradient-card: linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(248,250,252,1) 100%);
    
    /* Semantic Colors */
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-success-dark: #059669;
    
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-warning-dark: #d97706;
    
    --color-danger: #ef4444;
    --color-danger-light: #fee2e2;
    --color-danger-dark: #dc2626;
    
    --color-info: #06b6d4;
    --color-info-light: #cffafe;
    --color-info-dark: #0891b2;
    
    /* Layout */
    --sidebar-width: 280px;
    --navbar-height: 48px;
    --container-max-width: 1200px;
    --content-max-width: 900px;
    
    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows - Enhanced depth */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.05);
    --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 rgb(59 130 246 / 0.15);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-card-hover: 0 12px 30px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;
    --transition-spring: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================
   Dark Mode Theme
   ============================================ */
[data-theme="dark"] {
    /* Dark backgrounds */
    --color-white: #1e293b;
    --color-gray-50: #0f172a;
    --color-gray-100: #1e293b;
    --color-gray-200: #334155;
    --color-gray-300: #475569;
    --color-gray-400: #64748b;
    --color-gray-500: #94a3b8;
    --color-gray-600: #cbd5e1;
    --color-gray-700: #e2e8f0;
    --color-gray-800: #f1f5f9;
    --color-gray-900: #f8fafc;
    
    /* Brand Colors - Brighter for dark mode */
    --color-primary: #60a5fa;
    --color-primary-light: #93c5fd;
    --color-primary-dark: #3b82f6;
    --color-primary-50: #1e3a5f;
    --color-primary-100: #1e40af;
    
    /* Gradients for dark mode */
    --gradient-primary: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #2563eb 100%);
    --gradient-card: linear-gradient(180deg, rgba(30,41,59,0) 0%, rgba(15,23,42,1) 100%);
    
    /* Semantic Colors - Adjusted for dark mode */
    --color-success: #34d399;
    --color-success-light: #064e3b;
    --color-success-dark: #10b981;
    
    --color-warning: #fbbf24;
    --color-warning-light: #78350f;
    --color-warning-dark: #f59e0b;
    
    --color-danger: #f87171;
    --color-danger-light: #7f1d1d;
    --color-danger-dark: #ef4444;
    
    --color-info: #22d3ee;
    --color-info-light: #164e63;
    --color-info-dark: #06b6d4;
    
    /* 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 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.4);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.6);
    --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.3);
    --shadow-glow: 0 0 20px rgb(96 165 250 / 0.25);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-card-hover: 0 12px 30px rgba(0, 0, 0, 0.4);
}

/* Dark mode specific overrides */
[data-theme="dark"] body {
    background-color: #0f172a;
}

[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.95);
    border-bottom-color: #334155;
}

[data-theme="dark"] .sidebar-menu {
    background: #1e293b;
    border-right-color: #334155;
}

[data-theme="dark"] .sidebar-header {
    border-bottom-color: #334155;
}

[data-theme="dark"] .nav-category-header {
    color: #e2e8f0;
}

[data-theme="dark"] .nav-category-header:hover {
    background: #334155;
}

[data-theme="dark"] .nav-links a {
    color: #94a3b8;
}

[data-theme="dark"] .nav-links a:hover {
    background: #334155;
    color: #60a5fa;
}

[data-theme="dark"] .content-card {
    background: #1e293b;
    border-color: #334155;
}

[data-theme="dark"] .card {
    background: #1e293b;
    border-color: #334155;
}

[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
    background: #0f172a;
    border-color: #334155;
    color: #e2e8f0;
}

[data-theme="dark"] input:focus,
[data-theme="dark"] select:focus,
[data-theme="dark"] textarea:focus {
    border-color: #60a5fa;
    background: #1e293b;
}

[data-theme="dark"] table {
    background: #1e293b;
}

[data-theme="dark"] th {
    background: #0f172a;
    color: #e2e8f0;
    border-color: #334155;
}

[data-theme="dark"] td {
    border-color: #334155;
    color: #cbd5e1;
}

[data-theme="dark"] tbody tr:hover {
    background: #334155;
}

[data-theme="dark"] .mobile-nav-footer {
    background: rgba(30, 41, 59, 0.95);
    border-top-color: #334155;
}

[data-theme="dark"] .filter-form {
    background: #1e293b;
    border-color: #334155;
}

[data-theme="dark"] .empty-state {
    background: linear-gradient(180deg, #1e293b 0%, transparent 100%);
    border-color: #334155;
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--color-gray-400);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    margin-right: var(--space-2);
}

.theme-toggle:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
}

.theme-toggle i {
    font-size: 1.125rem;
    transition: transform var(--transition-normal);
}

.theme-toggle:hover i {
    transform: rotate(15deg);
}

[data-theme="dark"] .theme-toggle:hover {
    background: #334155;
}

/* Icon swap for theme toggle */
.theme-toggle .fa-moon { display: block; }
.theme-toggle .fa-sun { display: none; }

[data-theme="dark"] .theme-toggle .fa-moon { display: none; }
[data-theme="dark"] .theme-toggle .fa-sun { display: block; }

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-gray-50);
    min-height: 100vh;
    min-height: 100dvh;
    /* Safe area insets for notched phones */
    padding-top: env(safe-area-inset-top);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-gray-900);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: 1.875rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

h4 {
    font-size: 1.125rem;
    font-weight: 500;
}

p {
    margin-bottom: var(--space-4);
    color: var(--color-gray-600);
}

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

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

small {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

/* ============================================
   Navbar - Modern & Clean
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--navbar-height);
    padding: 0 var(--space-6);
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
}

.navbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    color: var(--color-gray-600);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.menu-toggle:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
}

.navbar-brand {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-gray-900) !important;
    text-decoration: none !important;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.navbar-brand .brand-full {
    display: inline;
}

.navbar-brand .brand-mobile {
    display: none;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.navbar-links span {
    font-size: 0.8125rem;
    color: var(--color-gray-600);
    font-weight: 500;
}

.notification-icon {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    color: var(--color-gray-600);
    transition: all var(--transition-fast);
}

.notification-icon:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
}

.notification-icon i {
    font-size: 1rem;
}

.notification-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    font-size: 0.65rem;
    font-weight: 600;
    line-height: 16px;
    text-align: center;
    color: var(--color-white);
    background: var(--color-danger);
    border-radius: var(--radius-full);
}

/* ============================================
   Sidebar Navigation - Modern Drawer
   ============================================ */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgb(0 0 0 / 0.3);
    backdrop-filter: blur(4px);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.sidebar-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

.sidebar-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100%;
    background: var(--color-white);
    z-index: 250;
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
}

.sidebar-menu.is-open {
    transform: translateX(0);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--color-gray-200);
}

.sidebar-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin: 0;
}

.close-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-lg);
    background: transparent;
    border: none;
    color: var(--color-gray-500);
    cursor: pointer;
    font-size: 1.5rem;
    transition: all var(--transition-fast);
}

.close-btn:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4) 0;
}

.nav-category {
    border-bottom: 1px solid var(--color-gray-100);
}

.nav-category-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-4) var(--space-6);
    background: transparent;
    border: none;
    color: var(--color-gray-700);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
}

.nav-category-header:hover {
    background: var(--color-gray-50);
    color: var(--color-gray-900);
}

.nav-category-header span {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.nav-category-header .fas:first-child {
    color: var(--color-primary);
    width: 20px;
}

.nav-category-header .fa-chevron-down {
    font-size: 0.75rem;
    color: var(--color-gray-400);
    transition: transform var(--transition-normal);
}

.nav-category-header.active .fa-chevron-down {
    transform: rotate(180deg);
}

.nav-links {
    list-style: none;
    max-height: 0;
    overflow: hidden;
    background: var(--color-gray-50);
    transition: max-height 0.4s ease-in-out;
}

.nav-links.show {
    max-height: 500px;
}

.nav-links li a {
    display: block;
    padding: var(--space-3) var(--space-6);
    padding-left: calc(var(--space-6) + 32px);
    color: var(--color-gray-600);
    font-size: 0.875rem;
    font-weight: 400;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.nav-links li a:hover {
    background: var(--color-primary-50);
    color: var(--color-primary-dark);
    border-left-color: var(--color-primary);
}

.sidebar-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-gray-200);
}

.sidebar-footer a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--color-gray-600);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.sidebar-footer a:hover {
    background: var(--color-danger-light);
    color: var(--color-danger-dark);
}

/* ============================================
   Main Container & Layout
   ============================================ */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--space-8);
    background: transparent;
    box-shadow: none;
    border: none;
}

.content-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
    padding: var(--space-8);
    margin-bottom: var(--space-6);
    border: 1px solid rgba(0, 0, 0, 0.04);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.content-card:hover {
    box-shadow: var(--shadow-card-hover);
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.content-card:hover::before {
    opacity: 1;
}

.page-header {
    margin-bottom: var(--space-8);
    position: relative;
}

.page-header h1 {
    margin-bottom: var(--space-2);
    border: none;
    padding: 0;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.page-header h1 i {
    color: var(--color-primary);
    font-size: 0.9em;
}

.page-header p {
    color: var(--color-gray-500);
    font-size: 1rem;
    margin: 0;
}

/* ============================================
   Cards & Grid System
   ============================================ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-6);
}

.card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: var(--gradient-card);
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.card:hover::after {
    opacity: 1;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin: 0;
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    background: var(--color-primary-50);
    color: var(--color-primary);
}

.card-body {
    color: var(--color-gray-600);
}

.card-footer {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-gray-100);
}

/* Summary/Stats Cards - Premium */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.stat-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.stat-card:hover::before {
    opacity: 1;
}

.stat-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-gray-500);
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.stat-change {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: 0.8125rem;
    font-weight: 600;
    margin-top: var(--space-2);
}

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

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

.stat-card.success::before { background: var(--color-success); }
.stat-card.warning::before { background: var(--color-warning); }
.stat-card.danger::before { background: var(--color-danger); }
.stat-card.primary::before { background: var(--color-primary); }

.stat-card.success .stat-value { color: var(--color-success); }
.stat-card.warning .stat-value { color: var(--color-warning); }
.stat-card.danger .stat-value { color: var(--color-danger); }
.stat-card.primary .stat-value { color: var(--color-primary); }

/* ============================================
   Buttons - Premium & Interactive
   ============================================ */
.btn, button, .action-button, input[type="submit"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-primary);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.btn::before, button::before, .action-button::before, input[type="submit"]::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before, button:hover::before, .action-button:hover::before, input[type="submit"]:hover::before {
    left: 100%;
}

.btn:hover, button:hover, .action-button:hover, input[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active, button:active, .action-button:active, input[type="submit"]:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn:disabled, button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn:disabled::before, button:disabled::before {
    display: none;
}

/* Button Variants */
.btn-primary, .primary-action, .login-button, button[type="submit"] {
    background: var(--gradient-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn-primary:hover, .primary-action:hover, .login-button:hover, button[type="submit"]:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, #1d4ed8 100%);
    border-color: var(--color-primary-dark);
    color: var(--color-white);
    box-shadow: var(--shadow-glow);
}

.btn-secondary, .secondary-action, .cancel-button {
    background: var(--color-white);
    color: var(--color-gray-700);
    border-color: var(--color-gray-300);
}

.btn-secondary:hover, .secondary-action:hover, .cancel-button:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-400);
    color: var(--color-gray-900);
}

.btn-success, .save-button, .approve-button {
    background: var(--color-success);
    color: var(--color-white);
    border-color: var(--color-success);
}

.btn-success:hover, .save-button:hover, .approve-button:hover {
    background: var(--color-success-dark);
    border-color: var(--color-success-dark);
    color: var(--color-white);
}

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

.btn-danger:hover, .delete-button:hover {
    background: var(--color-danger-dark);
    border-color: var(--color-danger-dark);
    color: var(--color-white);
}

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

.btn-warning:hover, .revise-button:hover {
    background: var(--color-warning-dark);
    border-color: var(--color-warning-dark);
}

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

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

.btn-ghost {
    background: transparent;
    color: var(--color-gray-600);
    border: none;
    box-shadow: none;
}

.btn-ghost:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
    box-shadow: none;
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-2) var(--space-3);
    font-size: 0.8125rem;
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 1rem;
}

/* Button Group */
.btn-group {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.button-small { 
    padding: var(--space-2) var(--space-4); 
    font-size: 0.8125rem; 
}

a.button, a.back-link { 
    padding: var(--space-3) var(--space-5); 
    display: inline-flex; 
}

.back-link {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.back-link:hover {
    background: var(--color-gray-200);
}

/* ============================================
   Forms - Premium & Accessible
   ============================================ */
.form-group {
    margin-bottom: var(--space-5);
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-700);
    transition: color var(--transition-fast);
}

.form-group:focus-within label {
    color: var(--color-primary);
}

.form-group label.required::after {
    content: '*';
    color: var(--color-danger);
    margin-left: var(--space-1);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="date"],
.form-group input[type="tel"],
.form-group input[type="number"],
.form-group input[type="file"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    color: var(--color-gray-900);
    background: var(--color-white);
    border: 1.5px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    appearance: none;
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
    border-color: var(--color-gray-300);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px var(--color-primary-100);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-gray-400);
}

.form-group input[disabled],
.form-group select[disabled],
.form-group textarea[disabled] {
    background: var(--color-gray-100);
    cursor: not-allowed;
    opacity: 0.7;
}

.form-group input[type="number"] {
    width: auto;
    max-width: 160px;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--space-3) center;
    background-repeat: no-repeat;
    background-size: 20px;
    padding-right: var(--space-10);
}

.form-note {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    margin-top: var(--space-2);
}

.form-error {
    font-size: 0.8125rem;
    color: var(--color-danger);
    margin-top: var(--space-2);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
}

/* Checkbox & Radio Styles */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.form-check label {
    margin: 0;
    font-weight: 400;
    cursor: pointer;
}

/* Inline form */
.form-inline {
    display: flex;
    align-items: flex-end;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.form-inline .form-group {
    margin-bottom: 0;
}

/* ============================================
   Tables - Premium & Readable
   ============================================ */
.table-container {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(0, 0, 0, 0.04);
    overflow: hidden;
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-card);
}

table, .data-table, .user-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

thead {
    background: linear-gradient(180deg, var(--color-gray-50) 0%, var(--color-gray-100) 100%);
}

th {
    padding: var(--space-4) var(--space-5);
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-600);
    border-bottom: 2px solid var(--color-gray-200);
    position: sticky;
    top: 0;
    background: inherit;
}

td {
    padding: var(--space-4) var(--space-5);
    color: var(--color-gray-700);
    border-bottom: 1px solid var(--color-gray-100);
    vertical-align: middle;
}

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

tbody tr {
    transition: all var(--transition-fast);
}

tbody tr:hover {
    background: var(--color-primary-50);
}

tbody tr:nth-child(even) {
    background: var(--color-gray-50);
}

tbody tr:nth-child(even):hover {
    background: var(--color-primary-50);
}

.table-actions {
    display: flex;
    gap: var(--space-2);
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

tr:hover .table-actions {
    opacity: 1;
}

/* ============================================
   Alerts & Messages - Premium
   ============================================ */
.alert, .message {
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-5);
    font-size: 0.9375rem;
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    position: relative;
    overflow: hidden;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert i, .message i {
    flex-shrink: 0;
    margin-top: 2px;
    font-size: 1.1rem;
}

.alert-success, .success-message {
    background: linear-gradient(135deg, var(--color-success-light) 0%, #a7f3d0 100%);
    color: var(--color-success-dark);
    border: 1px solid var(--color-success);
    border-left: 4px solid var(--color-success);
}

.alert-danger, .error-message, .error-message-alt {
    background: linear-gradient(135deg, var(--color-danger-light) 0%, #fecaca 100%);
    color: var(--color-danger-dark);
    border: 1px solid var(--color-danger);
    border-left: 4px solid var(--color-danger);
}

.alert-warning, .warning-message {
    background: linear-gradient(135deg, var(--color-warning-light) 0%, #fde68a 100%);
    color: var(--color-warning-dark);
    border: 1px solid var(--color-warning);
    border-left: 4px solid var(--color-warning);
}

.alert-info, .info-message {
    background: linear-gradient(135deg, var(--color-info-light) 0%, #a5f3fc 100%);
    color: var(--color-info-dark);
    border: 1px solid var(--color-info);
    border-left: 4px solid var(--color-info);
}

/* ============================================
   Badges & Status Labels - Premium
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.5;
    border-radius: var(--radius-full);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: currentColor;
    opacity: 0.1;
}

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

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

/* Status Dot Indicator */
.badge-dot {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.badge-dot::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    flex-shrink: 0;
}

.badge-warning {
    background: var(--color-warning-light);
    color: var(--color-warning-dark);
}

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

.badge-gray {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

/* Status Classes */
.status-Assigned, .status-PendingInvite { color: var(--color-primary); font-weight: 600; }
.status-InProgress { color: var(--color-warning-dark); font-weight: 600; }
.status-SubmittedForReview, .status-PendingSuperAdminReview { color: var(--color-warning); font-weight: 600; }
.status-NeedsRevision { color: var(--color-danger); font-weight: 600; }
.status-Approved, .status-Active { color: var(--color-success); font-weight: 600; }
.status-Completed, .status-Inactive, .status-Disabled { color: var(--color-gray-500); font-weight: 600; }

/* Invoice Status */
.invoice-status {
    display: inline-flex;
    padding: var(--space-1) var(--space-3);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.invoice-status.status-pending {
    background: var(--color-warning-light);
    color: var(--color-warning-dark);
}

.invoice-status.status-approved {
    background: var(--color-success-light);
    color: var(--color-success-dark);
}

.invoice-status.status-rejected {
    background: var(--color-danger-light);
    color: var(--color-danger-dark);
}

/* ============================================
   Lists & Action Links
   ============================================ */
.action-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.action-links li {
    margin-bottom: var(--space-3);
}

.action-links a {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 500;
    color: var(--color-primary);
}

.action-links a:hover {
    color: var(--color-primary-dark);
}

/* Task List - Premium */
.task-list {
    list-style: none;
    padding: 0;
}

.task-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
    padding: var(--space-5);
    background: var(--color-white);
    border: 1px solid rgba(0, 0, 0, 0.04);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-3);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.task-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--color-primary);
    border-radius: var(--radius-xl) 0 0 var(--radius-xl);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.task-list li:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.task-list li:hover::before {
    opacity: 1;
}

.task-name {
    font-weight: 600;
    color: var(--color-gray-900);
}

.task-meta {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.task-description {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: linear-gradient(90deg, var(--color-primary-50) 0%, var(--color-gray-50) 100%);
    border-left: 3px solid var(--color-primary);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin-top: var(--space-3);
}

.task-actions {
    display: flex;
    gap: var(--space-2);
}

/* ============================================
   Filter & Search Components - Premium
   ============================================ */
.filter-form {
    background: var(--color-white);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-normal);
}

.filter-form:focus-within {
    box-shadow: var(--shadow-card-hover);
    border-color: var(--color-primary-100);
}

.filter-controls {
    display: flex;
    align-items: flex-end;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.filter-controls .form-group {
    margin-bottom: 0;
}

.filter-actions {
    display: flex;
    gap: var(--space-3);
}

.search-box {
    position: relative;
}

.search-box input {
    padding-left: var(--space-10);
    transition: all var(--transition-normal);
}

.search-box:focus-within i {
    color: var(--color-primary);
}

.search-box i {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400);
    transition: color var(--transition-normal);
}

/* ============================================
   Dashboard Components - Premium
   ============================================ */
.welcome-banner {
    background: var(--gradient-hero);
    color: var(--color-white);
    padding: var(--space-10);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-8);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.welcome-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    pointer-events: none;
}

.welcome-banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: 10%;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    pointer-events: none;
}

.welcome-banner h2 {
    color: var(--color-white);
    font-size: 1.75rem;
    margin-bottom: var(--space-2);
    border: none;
    position: relative;
    z-index: 1;
}

.welcome-banner p {
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
    font-size: 1.0625rem;
    position: relative;
    z-index: 1;
}

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

.summary-box {
    background: var(--color-white);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
    transition: all var(--transition-spring);
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}

.summary-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.summary-box:hover {
    border-color: var(--color-primary-100);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
}

.summary-box:hover::before {
    transform: scaleX(1);
}

.summary-box h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-gray-100);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.summary-box h3 i {
    color: var(--color-primary);
    font-size: 1.125rem;
}

.role-section {
    background: var(--color-white);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-spring);
}

.role-section:hover {
    box-shadow: var(--shadow-card-hover);
}

.role-section h2 {
    font-size: 1.25rem;
    margin-bottom: var(--space-5);
    color: var(--color-gray-900);
    border: none;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.role-section h2 i {
    color: var(--color-primary);
}

.action-group {
    margin-bottom: var(--space-6);
}

.action-group h4 {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-3);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--color-gray-100);
}

/* ============================================
   Empty States - Premium
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-8);
    color: var(--color-gray-500);
    background: linear-gradient(180deg, var(--color-gray-50) 0%, transparent 100%);
    border-radius: var(--radius-xl);
    border: 2px dashed var(--color-gray-200);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: var(--space-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.5;
}

.empty-state h3 {
    color: var(--color-gray-700);
    margin-bottom: var(--space-2);
    font-size: 1.25rem;
    font-weight: 600;
}

.empty-state p {
    font-size: 0.9375rem;
    max-width: 300px;
    margin: 0 auto;
    line-height: 1.6;
}

.empty-state .btn {
    margin-top: var(--space-6);
}

/* ============================================
   Feedback Overlay
   ============================================ */
.feedback-overlay-banner {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: var(--space-4);
    text-align: center;
    font-weight: 500;
    z-index: 1000;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { transform: translateY(-100%); }
    to { transform: translateY(0); }
}

/* ============================================
   Loading States - Premium
   ============================================ */
.loading {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-gray-600);
    font-weight: 500;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

.spinner-lg {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

/* Pulse loading effect */
.loading-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

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

/* Skeleton loading */
.skeleton {
    background: linear-gradient(90deg, 
        var(--color-gray-200) 25%, 
        var(--color-gray-100) 50%, 
        var(--color-gray-200) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

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

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

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

/* Gradient text */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-primary { background-color: var(--color-primary); }
.bg-success { background-color: var(--color-success); }
.bg-warning { background-color: var(--color-warning); }
.bg-danger { background-color: var(--color-danger); }

/* Gradient backgrounds */
.bg-gradient { background: var(--gradient-primary); }
.bg-gradient-hero { background: var(--gradient-hero); }
.bg-gradient-card { background: var(--gradient-card); }

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.p-0 { padding: 0; }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-card { box-shadow: var(--shadow-card); }

.hidden { display: none; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* Hover utilities */
.hover-lift {
    transition: transform var(--transition-spring), box-shadow var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hover-glow {
    transition: box-shadow var(--transition-normal);
}

.hover-glow:hover {
    box-shadow: var(--shadow-glow);
}

/* Animations */
.animate-fade-in {
    animation: fadeIn 0.5s ease-out;
}

.animate-slide-up {
    animation: slideUp 0.5s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.3s ease-out;
}

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

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

@keyframes scaleIn {
    from { 
        opacity: 0; 
        transform: scale(0.95); 
    }
    to { 
        opacity: 1; 
        transform: scale(1); 
    }
}

/* ============================================
   Global Back Button & Page Navigation - Premium
   ============================================ */
.page-back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-gray-500);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
    transition: all var(--transition-normal);
    background: var(--color-gray-100);
    border: 1px solid transparent;
}

.page-back-link:hover {
    color: var(--color-primary);
    background: var(--color-primary-50);
    border-color: var(--color-primary-100);
    transform: translateX(-4px);
}

.page-back-link i {
    font-size: 0.75rem;
    transition: transform var(--transition-normal);
}

.page-back-link:hover i {
    transform: translateX(-3px);
}

/* Mobile bottom navigation bar - Premium */
.mobile-nav-footer {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--color-gray-100);
    padding: 0.25rem 0.5rem;
    padding-bottom: max(0.25rem, env(safe-area-inset-bottom));
    z-index: 100;
    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.06);
}

.mobile-nav-footer .nav-items {
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.mobile-nav-footer .nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.35rem 0.6rem;
    color: var(--color-gray-400);
    text-decoration: none;
    font-size: 0.5625rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
    position: relative;
}

.mobile-nav-footer .nav-item i {
    font-size: 1rem;
    margin-bottom: 0.0625rem;
    transition: transform var(--transition-fast);
}

.mobile-nav-footer .nav-item:hover {
    color: var(--color-primary);
}

.mobile-nav-footer .nav-item:hover i {
    transform: scale(1.1);
}

.mobile-nav-footer .nav-item.active {
    color: var(--color-primary);
}

.mobile-nav-footer .nav-item.active::before {
    content: '';
    position: absolute;
    top: -0.25rem;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .container {
        padding: var(--space-6);
    }
    
    .content-card {
        padding: var(--space-6);
    }
}

@media (max-width: 768px) {
    :root {
        --navbar-height: 40px;
    }
    
    .navbar {
        padding: 0 var(--space-3);
    }
    
    /* Mobile Brand Switch */
    .navbar-brand .brand-full {
        display: none;
    }
    
    .navbar-brand .brand-mobile {
        display: inline;
    }
    
    .navbar-links span {
        display: none;
    }
    
    .container {
        padding: var(--space-4);
        padding-bottom: 80px; /* Space for mobile nav footer */
    }
    
    .content-card {
        padding: var(--space-5);
        border-radius: var(--radius-lg);
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    h2 {
        font-size: 1.25rem;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    table {
        font-size: 0.8125rem;
    }
    
    th, td {
        padding: var(--space-3);
    }
    
    .btn-group {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-group .btn {
        width: 100%;
    }
    
    .filter-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-controls .form-group {
        width: 100%;
    }
    
    .task-list li {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .task-actions {
        width: 100%;
        margin-top: var(--space-3);
    }
    
    .welcome-banner {
        padding: var(--space-6);
    }
    
    .dashboard-summary-grid {
        grid-template-columns: 1fr;
    }
    
    /* Show mobile bottom navigation */
    .mobile-nav-footer {
        display: block;
    }
    
    /* Hide page back links on mobile - use bottom nav instead */
    .page-back-link.desktop-only {
        display: none;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .table-container {
        border-radius: var(--radius-md);
        margin-left: calc(var(--space-4) * -1);
        margin-right: calc(var(--space-4) * -1);
        border-radius: 0;
        border-left: none;
        border-right: none;
    }
    
    th:first-child, td:first-child {
        padding-left: var(--space-4);
    }
    
    th:last-child, td:last-child {
        padding-right: var(--space-4);
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .navbar,
    .sidebar-menu,
    .sidebar-overlay,
    .btn,
    button,
    .action-button {
        display: none !important;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
        margin: 0;
    }
    
    .content-card {
        box-shadow: none;
        border: none;
    }
    
    body {
        background: white;
        color: black;
    }
}

/* ============================================
   Accessibility
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

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

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}