/* Student Enrollment System - Admin Stylesheet */
/* Extends main.css with admin-specific styling */

/* Import brand colors and variables from main.css */
:root {
    /* Admin-specific colors */
    --admin-primary: #004F9B;
    --admin-secondary: #009189;
    --admin-accent: #FF6500;
    --admin-success: #198754;
    --admin-warning: #ffc107;
    --admin-danger: #dc3545;
    --admin-info: #0dcaf0;
    
    /* Admin gradients */
    --admin-gradient: linear-gradient(135deg, var(--admin-primary) 0%, var(--admin-secondary) 100%);
    --admin-gradient-light: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    --admin-sidebar-gradient: linear-gradient(180deg, var(--admin-primary) 0%, #003d7a 100%);
    
    /* Admin layout */
    --admin-sidebar-width: 280px;
    --admin-header-height: 70px;
    --admin-content-padding: 2rem;
    --admin-mobile-padding: 1rem;
    
    /* Admin shadows and borders */
    --admin-shadow-sm: 0 0.125rem 0.25rem rgba(0, 79, 155, 0.075);
    --admin-shadow-md: 0 0.5rem 1rem rgba(0, 79, 155, 0.15);
    --admin-shadow-lg: 0 1rem 3rem rgba(0, 79, 155, 0.175);
    --admin-border-radius: 12px;
}

/* ====================
   ADMIN LAYOUT
==================== */

.admin-container {
    min-height: 100vh;
    background: #f8f9fa;
}

.admin-header {
    background: white;
    border-bottom: 1px solid #dee2e6;
    box-shadow: var(--admin-shadow-sm);
    height: var(--admin-header-height);
    position: sticky;
    top: 0;
    z-index: 1020;
}

.admin-sidebar {
    background: var(--admin-sidebar-gradient);
    width: var(--admin-sidebar-width);
    min-height: calc(100vh - var(--admin-header-height));
    position: fixed;
    left: 0;
    top: var(--admin-header-height);
    overflow-y: auto;
    transition: transform 0.3s ease;
    z-index: 1010;
    box-shadow: var(--admin-shadow-md);
}

.admin-content {
    transition: margin-left 0.3s ease;
    max-width: 1400px !important;
    margin: 0 auto !important;
    padding: 2rem !important;
    min-height: calc(100vh - 120px) !important;    
}

/* Sidebar collapsed state */
.sidebar-collapsed .admin-sidebar {
    transform: translateX(-100%);
}

.sidebar-collapsed .admin-content {
    margin-left: 0;
}

/* ====================
   ADMIN NAVIGATION
==================== */

.admin-nav {
    padding: 1.5rem 0;
}

.admin-nav-item {
    margin-bottom: 0.25rem;
}

.admin-nav-link {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: 0;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.admin-nav-link:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.admin-nav-link.active {
    color: white;
    background: rgba(255, 255, 255, 0.15);
    border-right: 4px solid var(--admin-accent);
}

.admin-nav-link i {
    width: 20px;
    margin-right: 0.75rem;
    font-size: 1.1rem;
    text-align: center;
}

.admin-nav-text {
    font-weight: 500;
    font-size: 0.9rem;
}

/* Admin nav sections */
.admin-nav-section {
    margin: 2rem 0 1rem;
    padding: 0 1.5rem;
}

.admin-nav-section-title {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

/* ====================
   ADMIN CONTENT AREAS
==================== */

.admin-page-header {
    background: white;
    border-radius: var(--admin-border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--admin-shadow-sm);
    border-left: 4px solid var(--admin-secondary);
}

.admin-page-title {
    color: var(--admin-primary);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.admin-page-subtitle {
    color: #6c757d;
    font-size: 1rem;
    margin-bottom: 0;
}

.admin-breadcrumb {
    background: transparent;
    padding: 0;
    margin-bottom: 1rem;
}

.admin-breadcrumb .breadcrumb-item a {
    color: var(--admin-secondary);
    text-decoration: none;
}

.admin-breadcrumb .breadcrumb-item.active {
    color: var(--admin-primary);
    font-weight: 500;
}

/* ====================
   ADMIN CARDS
==================== */

.admin-card {
    background: white;
    border: none;
    border-radius: var(--admin-border-radius);
    box-shadow: var(--admin-shadow-sm);
    transition: all 0.3s ease;
    overflow: hidden;
}

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

.admin-card-header {
    background: var(--admin-gradient-light);
    border-bottom: 1px solid #dee2e6;
    padding: 1.25rem 1.5rem;
    margin-bottom: 0;
}

.admin-card-title {
    color: var(--admin-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0;
    display: flex;
    align-items: center;
}

.admin-card-title i {
    margin-right: 0.5rem;
    color: var(--admin-secondary);
}

.admin-card-body {
    padding: 1.5rem;
}

/* Stats cards */
.admin-stats-card {
    text-align: center;
    padding: 1.5rem;
    border-radius: var(--admin-border-radius);
    background: white;
    box-shadow: var(--admin-shadow-sm);
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
}

.admin-stats-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--admin-shadow-md);
}

.admin-stats-card.success {
    border-left-color: var(--admin-success);
}

.admin-stats-card.warning {
    border-left-color: var(--admin-warning);
}

.admin-stats-card.danger {
    border-left-color: var(--admin-danger);
}

.admin-stats-card.info {
    border-left-color: var(--admin-info);
}

.admin-stats-number {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1;
}

.admin-stats-label {
    color: #6c757d;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0;
}

/* ====================
   ADMIN TABLES
==================== */

.admin-table {
    background: white;
    border-radius: var(--admin-border-radius);
    overflow: hidden;
    box-shadow: var(--admin-shadow-sm);
}

.admin-table .table {
    margin-bottom: 0;
}

.admin-table .table thead th {
    background: var(--admin-gradient-light);
    color: var(--admin-primary);
    font-weight: 600;
    font-size: 0.875rem;
    border-bottom: 2px solid #dee2e6;
    padding: 1rem 0.75rem;
    vertical-align: middle;
}

.admin-table .table tbody tr {
    transition: background-color 0.2s ease;
}

.admin-table .table tbody tr:hover {
    background-color: rgba(0, 145, 137, 0.05);
}

.admin-table .table td {
    padding: 0.875rem 0.75rem;
    vertical-align: middle;
    border-bottom: 1px solid #f1f3f4;
}

/* ====================
   ADMIN BUTTONS
==================== */

.btn-admin-primary {
    background: var(--admin-primary);
    border: 2px solid var(--admin-primary);
    color: white;
    font-weight: 600;
    border-radius: var(--admin-border-radius);
    transition: all 0.3s ease;
}

.btn-admin-primary:hover {
    background: #003d7a;
    border-color: #003d7a;
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 79, 155, 0.3);
}

.btn-admin-secondary {
    background: var(--admin-secondary);
    border: 2px solid var(--admin-secondary);
    color: white;
    font-weight: 600;
    border-radius: var(--admin-border-radius);
    transition: all 0.3s ease;
}

.btn-admin-secondary:hover {
    background: #007b73;
    border-color: #007b73;
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 145, 137, 0.3);
}

.btn-admin-accent {
    background: var(--admin-accent);
    border: 2px solid var(--admin-accent);
    color: white;
    font-weight: 600;
    border-radius: var(--admin-border-radius);
    transition: all 0.3s ease;
}

.btn-admin-accent:hover {
    background: #e55a00;
    border-color: #e55a00;
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 101, 0, 0.3);
}

/* Button groups */
.admin-btn-group {
    gap: 0.5rem;
}

.admin-btn-group .btn {
    border-radius: var(--admin-border-radius);
}

/* Action buttons */
.admin-action-btn {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
    border-radius: 6px;
    border: 1px solid;
    transition: all 0.2s ease;
}

.admin-action-btn:hover {
    transform: translateY(-1px);
}

/* ====================
   ADMIN FORMS
==================== */

.admin-form-container {
    background: white;
    border-radius: var(--admin-border-radius);
    padding: 2rem;
    box-shadow: var(--admin-shadow-sm);
}

.admin-form-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f1f3f4;
}

.admin-form-title {
    color: var(--admin-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.admin-form-subtitle {
    color: #6c757d;
    font-size: 0.9rem;
    margin-bottom: 0;
}

.admin-form-control {
    border: 2px solid #e9ecef;
    border-radius: var(--admin-border-radius);
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.admin-form-control:focus {
    border-color: var(--admin-secondary);
    box-shadow: 0 0 0 0.2rem rgba(0, 145, 137, 0.25);
}

.admin-form-label {
    color: var(--admin-primary);
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

/* ====================
   ADMIN MODALS
==================== */

.admin-modal .modal-content {
    border: none;
    border-radius: var(--admin-border-radius);
    box-shadow: var(--admin-shadow-lg);
}

.admin-modal .modal-header {
    background: var(--admin-gradient);
    color: white;
    border-radius: var(--admin-border-radius) var(--admin-border-radius) 0 0;
    border-bottom: none;
}

.admin-modal .modal-title {
    font-weight: 600;
}

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

.admin-modal .modal-body {
    padding: 2rem;
}

.admin-modal .modal-footer {
    background: #f8f9fa;
    border-top: 1px solid #dee2e6;
    padding: 1rem 2rem;
}

/* ====================
   ADMIN STATUS BADGES
==================== */

.admin-badge {
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-badge-success {
    background: rgba(25, 135, 84, 0.15);
    color: var(--admin-success);
    border: 1px solid rgba(25, 135, 84, 0.3);
}

.admin-badge-warning {
    background: rgba(255, 193, 7, 0.15);
    color: #b8860b;
    border: 1px solid rgba(255, 193, 7, 0.3);
}

.admin-badge-danger {
    background: rgba(220, 53, 69, 0.15);
    color: var(--admin-danger);
    border: 1px solid rgba(220, 53, 69, 0.3);
}

.admin-badge-info {
    background: rgba(13, 202, 240, 0.15);
    color: var(--admin-info);
    border: 1px solid rgba(13, 202, 240, 0.3);
}

.admin-badge-primary {
    background: rgba(0, 79, 155, 0.15);
    color: var(--admin-primary);
    border: 1px solid rgba(0, 79, 155, 0.3);
}

/* ====================
   ADMIN ALERTS
==================== */

.admin-alert {
    border: none;
    border-radius: var(--admin-border-radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid;
}

.admin-alert-success {
    background: rgba(25, 135, 84, 0.1);
    color: var(--admin-success);
    border-left-color: var(--admin-success);
}

.admin-alert-warning {
    background: rgba(255, 193, 7, 0.1);
    color: #856404;
    border-left-color: var(--admin-warning);
}

.admin-alert-danger {
    background: rgba(220, 53, 69, 0.1);
    color: var(--admin-danger);
    border-left-color: var(--admin-danger);
}

.admin-alert-info {
    background: rgba(13, 202, 240, 0.1);
    color: #055160;
    border-left-color: var(--admin-info);
}

/* ====================
   ADMIN PAGINATION
==================== */

.admin-pagination {
    background: white;
    border-radius: var(--admin-border-radius);
    padding: 1rem;
    box-shadow: var(--admin-shadow-sm);
    margin-top: 1.5rem;
}

.admin-pagination .pagination {
    margin-bottom: 0;
}

.admin-pagination .page-item .page-link {
    border: 1px solid #dee2e6;
    color: var(--admin-primary);
    padding: 0.5rem 0.75rem;
    margin: 0 0.125rem;
    border-radius: 6px;
}

.admin-pagination .page-item .page-link:hover {
    background: var(--admin-secondary);
    border-color: var(--admin-secondary);
    color: white;
}

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

/* ====================
   ADMIN FILTERS
==================== */

.admin-filters {
    background: white;
    border-radius: var(--admin-border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--admin-shadow-sm);
}

.admin-filter-group {
    margin-bottom: 1rem;
}

.admin-filter-group:last-child {
    margin-bottom: 0;
}

.admin-filter-label {
    color: var(--admin-primary);
    font-weight: 500;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

/* ====================
   RESPONSIVE ADMIN LAYOUT
==================== */

@media (max-width: 1199.98px) {
    :root {
        --admin-sidebar-width: 260px;
        --admin-content-padding: 1.5rem;
    }
}

@media (max-width: 991.98px) {
    .admin-sidebar {
        transform: translateX(-100%);
        position: fixed;
        z-index: 1050;
    }
    
    .admin-content {
        margin-left: 0;
        padding: var(--admin-mobile-padding);
    }
    
    .sidebar-open .admin-sidebar {
        transform: translateX(0);
    }
    
    .sidebar-open::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1040;
    }
    
    .admin-page-header {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .admin-page-title {
        font-size: 1.5rem;
    }
    
    .admin-stats-card {
        padding: 1.25rem;
        margin-bottom: 1rem;
    }
    
    .admin-stats-number {
        font-size: 1.75rem;
    }
}

@media (max-width: 767.98px) {
    :root {
        --admin-content-padding: 1rem;
        --admin-mobile-padding: 1rem;
    }
    
    .admin-page-header {
        padding: 1.25rem;
        margin-bottom: 1.25rem;
    }
    
    .admin-page-title {
        font-size: 1.375rem;
    }
    
    .admin-form-container,
    .admin-card-body {
        padding: 1.25rem;
    }
    
    .admin-table .table thead th,
    .admin-table .table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.875rem;
    }
    
    .admin-btn-group {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .admin-btn-group .btn {
        width: 100%;
    }
}

@media (max-width: 575.98px) {
    .admin-content {
        padding: 0.75rem;
    }
    
    .admin-page-header {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .admin-page-title {
        font-size: 1.25rem;
    }
    
    .admin-stats-card {
        padding: 1rem;
    }
    
    .admin-stats-number {
        font-size: 1.5rem;
    }
    
    .admin-modal .modal-body {
        padding: 1.5rem;
    }
}

/* ====================
   ADMIN UTILITIES
==================== */

.admin-text-primary {
    color: var(--admin-primary) !important;
}

.admin-text-secondary {
    color: var(--admin-secondary) !important;
}

.admin-text-accent {
    color: var(--admin-accent) !important;
}

.admin-bg-light {
    background: var(--admin-gradient-light) !important;
}

.admin-border-primary {
    border-color: var(--admin-primary) !important;
}

.admin-border-secondary {
    border-color: var(--admin-secondary) !important;
}

.admin-shadow-sm {
    box-shadow: var(--admin-shadow-sm) !important;
}

.admin-shadow-md {
    box-shadow: var(--admin-shadow-md) !important;
}

.admin-shadow-lg {
    box-shadow: var(--admin-shadow-lg) !important;
}

.admin-rounded {
    border-radius: var(--admin-border-radius) !important;
}

/* ====================
   ADMIN LOADING STATES
==================== */

.admin-skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: admin-loading 1.5s infinite;
}

@keyframes admin-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.admin-spinner {
    width: 1.5rem;
    height: 1.5rem;
    border: 0.2em solid var(--admin-secondary);
    border-top: 0.2em solid transparent;
    border-radius: 50%;
    animation: admin-spin 0.8s linear infinite;
}

@keyframes admin-spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* ====================
   ADMIN PRINT STYLES
==================== */

@media print {
    .admin-sidebar,
    .admin-header,
    .btn,
    .admin-btn-group {
        display: none !important;
    }
    
    .admin-content {
        margin-left: 0 !important;
        padding: 0 !important;
    }
    
    .admin-card,
    .admin-table {
        box-shadow: none !important;
        border: 1px solid #dee2e6 !important;
    }
}

/* ====================
   ACCESSIBILITY IMPROVEMENTS
==================== */

.admin-nav-link:focus,
.admin-form-control:focus,
.btn:focus {
    outline: 2px solid var(--admin-accent);
    outline-offset: 2px;
}

.admin-skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--admin-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 9999;
}

.admin-skip-link:focus {
    top: 6px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .admin-card,
    .admin-table {
        border: 2px solid #000;
    }
    
    .admin-nav-link:hover,
    .admin-nav-link.active {
        background: #000;
        color: #fff;
    }
}

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

/* Additional mobile and table enhancements */
.admin-toast {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    min-width: 300px;
}

.admin-filter-form select option {
    padding: 0.5rem;
}

/* Hide table view on mobile completely */
@media (max-width: 991.98px) {
    .admin-view-toggle,
    #table-view,
    .admin-enrollments-table {
        display: none !important;
    }
}

/* Enhanced mobile cards */
@media (max-width: 575.98px) {
    .admin-enrollments-cards {
        gap: 1rem;
    }
    
    .admin-enrollment-card {
        border-radius: 12px;
    }
}