/* ============================================
   ACADEMIC MESS MANAGEMENT SYSTEM - PROFESSIONAL UI
   Modern, Responsive, Enterprise-Grade Styling
   Bootstrap 5 Compatible
   ============================================ */

/* ============================================
   1. CSS VARIABLES & ROOT CONFIGURATION
   ============================================ */
:root {
    /* Primary Color Palette - Navy/Blue Theme */
    --primary-color: #1e3a8a;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    
    /* Secondary Colors */
    --secondary-color: #3b82f6;
    --accent-color: #60a5fa;
    
    /* Status Colors */
    --success-color: #10b981;
    --success-light: #34d399;
    --warning-color: #f59e0b;
    --warning-light: #fbbf24;
    --danger-color: #ef4444;
    --danger-light: #f87171;
    --info-color: #3b82f6;
    
    /* Neutral Colors */
    --light-color: #f8fafc;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --dark-color: #1f2937;
    
    /* Borders & Shadows */
    --border-color: #e5e7eb;
    --border-radius: 0.75rem;
    --border-radius-sm: 0.5rem;
    --border-radius-lg: 1rem;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Typography */
    --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
}

/* ============================================
   2. GLOBAL RESETS & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
    position: relative;
    min-height: 100%;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

body {
    font-family: var(--font-sans);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--gray-50);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    margin-bottom: 0;
}

/* ============================================
   FIX ISSUE #1: ENSURE BOOTSTRAP ICONS LOAD AND ARE VISIBLE
   ============================================ */
/* Ensure Bootstrap Icons are always visible */
.bi::before,
[class^="bi-"]::before,
[class*=" bi-"]::before {
    display: inline-block;
    font-family: "bootstrap-icons" !important;
    font-style: normal;
    font-weight: normal !important;
    font-variant: normal;
    text-transform: none;
    line-height: 1;
    vertical-align: -0.125em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Ensure icons are visible on dark backgrounds (navbar) */
.navbar .bi,
.navbar-dark .bi {
    color: rgba(255, 255, 255, 0.95);
}

/* Ensure icons are visible in dropdowns */
.dropdown-menu .bi {
    color: var(--primary-color);
}

/* Ensure icons are visible in cards and content */
.card .bi,
.table .bi,
.btn .bi,
.badge .bi {
    opacity: 1;
    visibility: visible;
}

/* Ensure icons are visible in icon wrappers */
.icon-wrapper .bi,
.icon-wrapper i[class^="bi-"],
.icon-wrapper i[class*=" bi-"] {
    opacity: 1 !important;
    visibility: visible !important;
    display: inline-block !important;
}

/* Ensure icon wrappers properly display icons */
.icon-wrapper {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
}

.icon-wrapper.rounded-circle {
    width: auto;
    height: auto;
    min-width: 60px;
    min-height: 60px;
}

/* Ensure icons maintain proper spacing */
.bi + * {
    margin-left: 0.35em;
}

/* ============================================
   3. TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    color: var(--gray-900);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 3px solid var(--primary-color);
    position: relative;
}

h1::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 80px;
    height: 3px;
    background: var(--accent-color);
}

h2 {
    font-size: 1.875rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

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

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

a:hover {
    color: var(--primary-light);
    text-decoration: none;
}

/* ============================================
   4. NAVBAR & HEADER
   ============================================ */
.navbar {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    box-shadow: var(--shadow-md);
    padding: 0.75rem 0;
    border-bottom: 4px solid var(--secondary-color);
    transition: var(--transition);
}

.navbar-brand {
    font-weight: var(--font-weight-bold);
    font-size: 1.5rem;
    color: white !important;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.02);
}

.navbar-brand i {
    font-size: 2rem;
    color: var(--accent-color);
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: var(--font-weight-medium);
    padding: 0.5rem 1rem !important;
    border-radius: var(--border-radius-sm);
    margin: 0 0.125rem;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    background-color: rgba(255, 255, 255, 0.15);
    color: white !important;
    transform: translateY(-2px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius);
    margin-top: 0.5rem;
    animation: fadeInDown 0.3s ease;
}

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

.dropdown-item {
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--gray-800); /* Fix issue #4: Ensure dark text for readability */
}

.dropdown-item i {
    width: 20px;
    text-align: center;
    color: var(--primary-color);
}

.dropdown-item:hover {
    background-color: var(--gray-50);
    padding-left: 2rem;
    color: var(--primary-color);
}

.dropdown-item:active,
.dropdown-item.active {
    background-color: var(--primary-color);
    color: white !important; /* Fix issue #4: White text on blue background when active */
}

.dropdown-item:active i,
.dropdown-item.active i {
    color: white !important; /* Fix issue #4: White icons when active */
}

.dropdown-divider {
    margin: 0.5rem 0;
    opacity: 0.1;
}

/* Mobile Navigation */
@media (max-width: 991.98px) {
    .navbar-collapse {
        background: var(--primary-dark);
        padding: 1rem;
        border-radius: var(--border-radius);
        margin-top: 0.5rem;
        box-shadow: var(--shadow-lg);
    }
    
    .dropdown-menu {
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.2);
    }
    
    .dropdown-item {
        color: rgba(255, 255, 255, 0.9);
    }
    
    .dropdown-item:hover {
        background-color: rgba(255, 255, 255, 0.15);
        color: white;
    }
}

/* ============================================
   5. MAIN CONTENT AREA
   ============================================ */
.container {
    flex: 1;
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-2xl);
}

main {
    animation: fadeIn 0.5s ease;
}

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

/* ============================================
   6. BREADCRUMB
   ============================================ */
.breadcrumb {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    padding: 1rem 1.5rem;
    margin-bottom: var(--spacing-lg);
}

.breadcrumb-item + .breadcrumb-item::before {
    color: var(--gray-400);
}

.breadcrumb-item a {
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
}

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

.breadcrumb-item.active {
    color: var(--gray-600);
}

/* ============================================
   7. CARDS
   ============================================ */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    background: white;
}

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

.card-header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
    font-weight: var(--font-weight-semibold);
    border: none;
    padding: 1.25rem 1.5rem;
    font-size: 1.125rem;
}

/* Override background and text color when card-header has light backgrounds */
.card-header.bg-white {
    background: #ffffff !important;
    color: var(--gray-900) !important;
}

.card-header.bg-light {
    background: #f8f9fa !important;
    color: var(--gray-900) !important;
}

.card-header.bg-white h1,
.card-header.bg-white h2,
.card-header.bg-white h3,
.card-header.bg-white h4,
.card-header.bg-white h5,
.card-header.bg-white h6,
.card-header.bg-light h1,
.card-header.bg-light h2,
.card-header.bg-light h3,
.card-header.bg-light h4,
.card-header.bg-light h5,
.card-header.bg-light h6 {
    color: var(--gray-900) !important;
}

.card-header.bg-white i,
.card-header.bg-light i {
    color: inherit;
}

.card-header i {
    margin-right: 0.5rem;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background-color: var(--gray-50);
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
}

/* ============================================
   TABS STYLING
   ============================================ */
.nav-tabs {
    border-bottom: none !important;
}

.nav-tabs .nav-link {
    color: var(--gray-700);
    background-color: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    padding: 0.75rem 1.25rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-tabs .nav-link:hover {
    color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.1);
    border-bottom-color: rgba(59, 130, 246, 0.3);
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.1);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

.nav-tabs .nav-link i {
    margin-right: 0.5rem;
}

/* Stats Cards */
.stats-card {
    border-radius: var(--border-radius);
    color: white;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 150px;
    height: 150px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(50%, -50%);
}

.stats-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.stats-card i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.stats-card h2 {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    margin: 0;
    color: white;
}

.stats-card h5,
.stats-card p {
    opacity: 0.9;
    font-weight: var(--font-weight-medium);
    color: white;
}

/* ============================================
   8. BUTTONS
   ============================================ */
.btn {
    border-radius: var(--border-radius-sm);
    font-weight: var(--font-weight-semibold);
    padding: 0.625rem 1.5rem;
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-transform: none;
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 0.25rem rgba(59, 130, 246, 0.25);
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--gray-500) 0%, var(--gray-600) 100%);
    color: white;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--gray-600) 0%, var(--gray-700) 100%);
    transform: translateY(-2px);
}

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

.btn-success:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: translateY(-2px);
}

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

.btn-warning:hover {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    transform: translateY(-2px);
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color) 0%, #2563eb 100%);
    color: white;
}

.btn-info:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1.125rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
}

.btn-group .btn:last-child {
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}

/* ============================================
   9. FORMS
   ============================================ */
.form-control,
.form-select {
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0.75rem 1rem;
    transition: var(--transition);
    font-size: 1rem;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(59, 130, 246, 0.15);
    outline: none;
}

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

.form-text {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.input-group {
    box-shadow: var(--shadow-sm);
    border-radius: var(--border-radius-sm);
}

.input-group-text {
    background-color: var(--gray-100);
    border: 2px solid var(--border-color);
    border-right: none;
    color: var(--gray-600);
    font-weight: var(--font-weight-medium);
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--border-color);
    cursor: pointer;
}

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

.form-check-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(59, 130, 246, 0.15);
}

.form-check-label {
    margin-left: 0.5rem;
    cursor: pointer;
}

.invalid-feedback,
.text-danger {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

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

.is-invalid:focus {
    box-shadow: 0 0 0 0.25rem rgba(239, 68, 68, 0.15);
}

/* ============================================
   10. TABLES
   ============================================ */
.table-responsive {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.table {
    background: white;
    margin-bottom: 0;
}

.table thead {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
}

.table thead th {
    border: none;
    font-weight: var(--font-weight-semibold);
    padding: 1rem 1.25rem;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.table tbody td {
    padding: 1rem 1.25rem;
    vertical-align: middle;
    border-color: var(--border-color);
}

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

.table tbody tr:hover {
    background-color: var(--gray-50);
    transform: scale(1.01);
    box-shadow: inset 4px 0 0 var(--primary-color);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(59, 130, 246, 0.02);
}

/* Mobile Table Optimization */
@media (max-width: 768px) {
    .table-responsive {
        -webkit-overflow-scrolling: touch;
    }
}

/* ============================================
   11. BADGES
   ============================================ */
.badge {
    padding: 0.5em 1em;
    border-radius: 2rem;
    font-weight: var(--font-weight-semibold);
    font-size: 0.875rem;
    letter-spacing: 0.3px;
}

/* ============================================
   12. ALERTS
   ============================================ */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow);
    border-left: 4px solid;
    animation: slideInRight 0.5s ease;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border-left-color: var(--success-color);
}

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

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border-left-color: var(--warning-color);
}

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

.alert i {
    font-size: 1.5rem;
    margin-right: 0.75rem;
}

/* ============================================
   13. MODALS
   ============================================ */
.modal-content {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
    border-bottom: none;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
    padding: 1.5rem;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    background-color: var(--gray-50);
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
}

/* ============================================
   14. FOOTER
   ============================================ */
.footer {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
    margin-top: auto;
    padding: 2rem 0;
    box-shadow: 0 -4px 6px rgba(0, 0, 0, 0.1);
}

.footer h6 {
    font-weight: var(--font-weight-bold);
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.footer p,
.footer a {
    opacity: 0.9;
    color: white;
}

.footer a:hover {
    opacity: 1;
    color: var(--accent-color);
}

.footer i {
    margin-right: 0.5rem;
}

/* ============================================
   15. UTILITY CLASSES
   ============================================ */
.text-primary {
    color: var(--primary-color) !important;
}

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

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%) !important;
}

.bg-gradient-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%) !important;
}

.bg-gradient-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #d97706 100%) !important;
}

.bg-gradient-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%) !important;
}

.bg-gradient-info {
    background: linear-gradient(135deg, var(--info-color) 0%, #2563eb 100%) !important;
}

.shadow-custom {
    box-shadow: var(--shadow);
}

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

/* Quick Action Items */
.quick-action {
    background: white;
    border-radius: var(--border-radius);
    padding: 0;
    text-decoration: none;
    color: var(--gray-800);
    display: block;
    transition: var(--transition);
    border: 2px solid var(--border-color);
    overflow: hidden;
}

.quick-action:hover {
    transform: translateX(8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.quick-action:hover .icon-wrapper {
    transform: scale(1.1);
}

.quick-action .icon-wrapper {
    transition: var(--transition);
}

/* Icon Wrapper */
.icon-wrapper {
    transition: var(--transition);
}

/* Hover Lift Effect */
.hover-lift {
    transition: var(--transition);
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg) !important;
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-lg);
}

.page-header h1 {
    border-bottom: none;
    padding-bottom: 0;
}

.page-header h1::after {
    display: none;
}

/* Status Indicator */
.status-indicator {
    display: inline-block;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
    }
}

/* Opacity Hover States */
.opacity-75 {
    opacity: 0.75;
}

.hover-opacity-100:hover {
    opacity: 1 !important;
}

/* ============================================
   16. ANIMATIONS & TRANSITIONS
   ============================================ */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

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

/* ============================================
   17. RESPONSIVE UTILITIES
   ============================================ */
@media (max-width: 575.98px) {
    h1 {
        font-size: 1.75rem;
    }
    
    .container {
        padding-top: var(--spacing-md);
        padding-bottom: var(--spacing-lg);
    }
    
    .stats-card h2 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

@media (min-width: 576px) and (max-width: 767.98px) {
    h1 {
        font-size: 2rem;
    }
}

/* ============================================
   18. PRINT STYLES
   ============================================ */
@media print {
    .navbar,
    .footer,
    .breadcrumb,
    .btn,
    .no-print {
        display: none !important;
    }
    
    body {
        background: white;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    .table {
        border: 1px solid #000;
    }
}

/* ============================================
   19. ACCESSIBILITY IMPROVEMENTS
   ============================================ */
:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================
   20. CUSTOM SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}