/* ========================================
   Employee Management Platform - Main Styles
   ======================================== */

/* 1. CSS Variables & Base Styles */
:root {
    --primary-color: #4F46E5;
    --primary-hover: #4338CA;
    --secondary-color: #10B981;
    --secondary-hover: #059669;
    --accent-color: #F59E0B;
    --accent-hover: #D97706;
    --danger-color: #EF4444;
    --danger-hover: #DC2626;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;
    
    --background: #F9FAFB;
    --surface: #FFFFFF;
    --surface-hover: #F3F4F6;
    --border-color: #E5E7EB;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 2. Layout Structure */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* 3. Sidebar Navigation */
.admin-sidebar {
    width: 260px;
    background: var(--surface);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto;
    transition: var(--transition);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-header img {
    height: 40px;
    width: auto;
}

.sidebar-header h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-menu {
    list-style: none;
    padding: 1rem 0;
}

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

.nav-item a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    font-weight: 500;
}

.nav-item a:hover {
    color: var(--primary-color);
    background: var(--surface-hover);
}

.nav-item.active a {
    color: var(--primary-color);
    background: rgba(79, 70, 229, 0.1);
}

.nav-item.active a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-color);
}

.nav-item i {
    width: 20px;
    margin-right: 0.75rem;
    text-align: center;
}

/* 4. Main Content Area */
.admin-main {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
    background: var(--background);
}

.admin-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-content {
    padding: 2rem;
}

/* 5. Page Headers */
.page-header {
    margin-bottom: 2rem;
}

.page-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* 6. Cards & Panels */
.card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

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

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title i {
    color: var(--primary-color);
}

/* 7. Dashboard Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.stat-icon.primary {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
}

.stat-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.stat-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.stat-icon.danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.stat-change {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

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

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

/* 8. Beautiful Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: var(--secondary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(79, 70, 229, 0.05);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: var(--danger-hover);
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
}

.btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    background-color: var(--surface-hover);
}

.btn-icon.btn-sm {
    width: 2rem;
    height: 2rem;
}

/* 9. Forms & Inputs */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 0.625rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.875rem;
    color: var(--text-primary);
    background: var(--surface);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

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

.form-text {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 0.375rem;
}

.form-select {
    appearance: none;
    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 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

/* 10. Tables */
.table-wrapper {
    background: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

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

.data-table thead {
    background: var(--surface-hover);
}

.data-table th {
    padding: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    border-bottom: 2px solid var(--border-color);
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

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

.data-table tbody tr:hover {
    background: var(--surface-hover);
}

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

/* 11. User Avatar */
.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.user-avatar.sm {
    width: 32px;
    height: 32px;
}

.user-avatar.lg {
    width: 56px;
    height: 56px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-details h5 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.125rem;
}

.user-details p {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* 12. Badges & Tags */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-primary {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
}

.badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

/* 13. Loading States */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: var(--radius);
}

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

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 0.8s ease-in-out infinite;
}

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

/* 14. Animations */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

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

.slide-in {
    animation: slideIn 0.3s ease-out;
}

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

/* 15. Alerts & Notifications */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* 16. Pagination */
.pagination {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 2rem;
}

.pagination a {
    padding: 0.5rem 0.875rem;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    border-radius: var(--radius);
    transition: var(--transition);
}

.pagination a:hover {
    background: var(--surface-hover);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

/* 17. Dropdown Menus */
/* Custom dropdown for admin header */
.admin-header .dropdown,
.app-header .dropdown {
    position: relative;
    display: inline-block;
}

.admin-header .dropdown-menu,
.app-header .dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    margin-top: 0.5rem;
    display: block !important;
}

.admin-header .dropdown.active .dropdown-menu,
.app-header .dropdown.active .dropdown-menu {
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateY(0) !important;
}

/* Debug - add border to active dropdown */
.dropdown.active {
    position: relative;
}

/* Ensure dropdown button has proper z-index */
.admin-header .dropdown button,
.app-header .dropdown button {
    position: relative;
    z-index: 10;
}

/* Bootstrap dropdown overrides for better styling */
.dropdown-menu {
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    padding: 0.5rem 0;
}

.dropdown-item {
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: var(--surface-hover);
    color: var(--primary-color);
}

/* Notification badge positioning */
.dropdown .btn-icon {
    position: relative;
}

.dropdown .btn-icon .badge {
    font-size: 0.625rem;
    padding: 0.125rem 0.375rem;
}

/* Dropdown header styling */
.dropdown-header {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    margin: 0;
}

/* Dropdown divider */
.dropdown-menu hr {
    margin: 0.5rem 0;
}

/* Center text link in dropdown */
.dropdown-menu > a.text-center {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--primary-color);
    font-size: 0.875rem;
    text-decoration: none;
}

.dropdown-menu > a.text-center:hover {
    background-color: var(--surface-hover);
}

.dropdown-item.text-danger:hover {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.dropdown-menu a {
    display: block;
    padding: 0.625rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
}

.dropdown-menu a:hover {
    background: var(--surface-hover);
    color: var(--primary-color);
}

.dropdown-menu hr {
    margin: 0.5rem 0;
    border: none;
    border-top: 1px solid var(--border-color);
}

/* 18. Search Box */
.search-box {
    position: relative;
    max-width: 400px;
}

.search-box input {
    width: 100%;
    padding: 0.625rem 1rem 0.625rem 2.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.875rem;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

/* 19. Empty States */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
    background: var(--surface-hover);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--text-muted);
}

.empty-state h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

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

/* 20. Responsive Design */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .admin-sidebar {
        transform: translateX(-100%);
        width: 280px;
    }
    
    .admin-sidebar.active {
        transform: translateX(0);
    }
    
    .admin-main {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .admin-content {
        padding: 1rem;
    }
    
    .data-table {
        font-size: 0.8125rem;
    }
    
    .data-table th,
    .data-table td {
        padding: 0.75rem 0.5rem;
    }
}

/* 21. Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* 22. Sidebar Overlay (Mobile) */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
    display: none;
}

.sidebar-overlay.active {
    display: block;
}

/* 23. Toast Notifications */
.toast {
    min-width: 300px;
}

/* 24. Color Input Styling */
.form-control-color {
    max-width: 3rem;
    padding: 0.375rem;
    cursor: pointer;
}

/* 25. Print Styles */
@media print {
    .admin-sidebar,
    .admin-header,
    .btn,
    .pagination {
        display: none !important;
    }
    
    .admin-main {
        margin-left: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
}
/* Dashboard Cards */
.dashboard-card {
    background: white;
    border: none;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    height: 100%;
    margin-bottom: 1.5rem;
}

.dashboard-card:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.dashboard-card .card-header {
    background: transparent;
    border-bottom: 1px solid #e5e7eb;
    padding: 1rem 1.5rem;
}

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

/* Navigation Dropdown Styles */
.nav-dropdown-toggle {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.dropdown-icon {
    margin-left: auto;
    font-size: 0.75rem;
    transition: transform 0.3s ease;
}

.nav-item.active .dropdown-icon,
.nav-item:hover .dropdown-icon {
    transform: rotate(180deg);
}

.nav-dropdown {
    display: none;
    padding-left: 1rem;
    margin-top: 0.25rem;
}

.nav-item.active .nav-dropdown,
.nav-item:hover .nav-dropdown {
    display: block;
}

.nav-dropdown li {
    list-style: none;
}

.nav-dropdown a {
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    border-radius: 0.375rem;
}

.nav-dropdown a:hover {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
}

.nav-dropdown a i {
    width: 1.25rem;
    margin-right: 0.5rem;
    font-size: 0.8rem;
}

/* Payroll specific styles */
.salary-summary {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 0.375rem;
}

.process-steps {
    position: relative;
}

.avatar {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-sm {
    width: 1.5rem;
    height: 1.5rem;
}

.avatar-lg {
    width: 3rem;
    height: 3rem;
}