/* Custom Payroll System Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --info-color: #16a085;
    --light-bg: #ecf0f1;
    --dark-text: #2c3e50;
    --border-color: #bdc3c7;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.15);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    color: var(--dark-text);
}

/* Navbar */
.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 0.5px;
}

.navbar {
    box-shadow: var(--shadow);
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%) !important;
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 1rem !important;
}

.navbar-nav .nav-link:hover {
    transform: translateY(-2px);
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--warning-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

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

/* Main Container */
.main-container {
    padding: 2rem 0;
    min-height: calc(100vh - 76px);
}

/* Cards */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    overflow: hidden;
}

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

.card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 1rem 1.5rem;
    border: none;
}

.card-body {
    padding: 1.5rem;
    background: white;
}

/* Dashboard Cards */
.stat-card {
    border-radius: 12px;
    padding: 1.5rem;
    color: white;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    transition: all 0.6s ease;
}

.stat-card:hover::before {
    top: -20%;
    right: -20%;
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.stat-card .stat-icon {
    font-size: 3rem;
    opacity: 0.8;
    margin-bottom: 1rem;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-card .stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-card.primary {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #2980b9 100%);
}

.stat-card.success {
    background: linear-gradient(135deg, var(--success-color) 0%, #229954 100%);
}

.stat-card.danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #c0392b 100%);
}

.stat-card.warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #d68910 100%);
}

.stat-card.info {
    background: linear-gradient(135deg, var(--info-color) 0%, #138d75 100%);
}

/* Buttons */
.btn {
    border-radius: 8px;
    padding: 0.5rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #2980b9 100%);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #229954 100%);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #c0392b 100%);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #d68910 100%);
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color) 0%, #138d75 100%);
}

/* Forms */
.form-control, .form-select {
    border-radius: 8px;
    border: 2px solid var(--border-color);
    padding: 0.6rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--dark-text);
}

/* Tables */
.table-container {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    overflow-x: auto;
}

.table {
    margin-bottom: 0;
}

.table thead th {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: white;
    font-weight: 600;
    border: none;
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 10;
}

.table tbody tr {
    transition: all 0.3s ease;
}

.table tbody tr:hover {
    background-color: rgba(52, 152, 219, 0.1);
    transform: scale(1.01);
}

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

/* Badges */
.badge {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.85rem;
}

/* Loading Spinner */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.spinner-border-custom {
    width: 3rem;
    height: 3rem;
    border-width: 0.3rem;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.login-card {
    max-width: 450px;
    width: 100%;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: white;
    padding: 2rem;
    text-align: center;
}

.login-header h2 {
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.login-body {
    padding: 2rem;
}

/* Alert Messages */
.alert {
    border-radius: 8px;
    border: none;
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow);
}

/* Pagination */
.pagination {
    margin-top: 1.5rem;
}

.page-link {
    border-radius: 8px;
    margin: 0 0.25rem;
    border: 2px solid var(--border-color);
    color: var(--primary-color);
    font-weight: 500;
}

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

.page-item.active .page-link {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

/* Modal Enhancements */
.modal-content {
    border-radius: 12px;
    border: none;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: white;
    border-radius: 12px 12px 0 0;
}

.modal-footer {
    border-top: 2px solid var(--border-color);
}

/* Filters Section */
.filters-section {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.2rem;
    }
    
    .stat-card {
        margin-bottom: 1rem;
    }
    
    .stat-card .stat-value {
        font-size: 1.5rem;
    }
    
    .table-container {
        padding: 1rem;
    }
    
    .table {
        font-size: 0.85rem;
    }
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .table {
        font-size: 0.9rem;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

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

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

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

/* Status Indicators */
.status-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 0.5rem;
}

.status-dot.active {
    background-color: var(--success-color);
}

.status-dot.inactive {
    background-color: var(--danger-color);
}

.status-dot.pending {
    background-color: var(--warning-color);
}

/* Action Buttons Group */
.action-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.action-buttons .btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.875rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: #95a5a6;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.empty-state h4 {
    margin-bottom: 0.5rem;
}