/**
 * Professional Admin Panel Styles
 * Modern, responsive, and user-friendly design
 */

:root {
    --primary-color: #9146ff;
    --primary-dark: #7c3ae8;
    --primary-light: #b794f6;
    --secondary-color: #1db954;
    --secondary-dark: #1aa34a;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --success-color: #28a745;
    
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #ffffff;
    --bg-light: #f8f9fa;
    --bg-hover: #f1f3f5;
    
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --text-white: #ffffff;
    
    --border-color: #e9ecef;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

/* Global Styles */
* {
    box-sizing: border-box;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    background-attachment: fixed;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Navbar */
.navbar {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%) !important;
    box-shadow: var(--shadow-md);
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
    transition: var(--transition);
}

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

.navbar-brand i {
    color: var(--primary-color);
    margin-right: 8px;
    font-size: 1.75rem;
    vertical-align: middle;
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--border-radius-sm);
    margin: 0 0.25rem;
    transition: var(--transition);
    position: relative;
}

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

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

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

.nav-link.active {
    background: rgba(145, 70, 255, 0.2);
    color: var(--primary-light) !important;
}

.nav-link.active::before {
    width: 80%;
}

.nav-link i {
    margin-right: 6px;
    font-size: 1.1rem;
}

.dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius-sm);
    padding: 0.5rem;
    margin-top: 0.5rem;
}

.dropdown-item {
    border-radius: var(--border-radius-sm);
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.dropdown-item:hover {
    background: var(--bg-hover);
    transform: translateX(4px);
}

.dropdown-item i {
    margin-right: 8px;
}

/* Container */
.container-fluid {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: var(--transition);
    background: var(--bg-card);
}

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

.card-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-bottom: 2px solid var(--border-color);
    font-weight: 600;
    padding: 1.25rem 1.5rem;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.card-body {
    padding: 1.5rem;
}

/* Stat Cards */
.stat-card {
    border-radius: var(--border-radius);
    padding: 1.5rem;
    color: white;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.stat-card:hover::before {
    transform: rotate(45deg);
}

.stat-card .card-title {
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.9;
    margin-bottom: 0.75rem;
}

.stat-card h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.stat-card i {
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
    opacity: 0.3;
}

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

.stat-card.success {
    background: linear-gradient(135deg, var(--success-color) 0%, #218838 100%);
}

.stat-card.warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #e0a800 100%);
}

.stat-card.info {
    background: linear-gradient(135deg, var(--info-color) 0%, #138496 100%);
}

/* Tables */
.table-responsive {
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

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

.table thead {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.table thead th {
    border: none;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    padding: 1rem 1.5rem;
}

.table tbody tr {
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}

.table tbody tr:hover {
    background: var(--bg-hover);
    transform: scale(1.01);
    box-shadow: var(--shadow-sm);
}

.table tbody td {
    padding: 1rem 1.5rem;
    vertical-align: middle;
}

/* Badges */
.badge {
    padding: 0.5em 0.75em;
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    border-radius: var(--border-radius-sm);
    text-transform: uppercase;
}

/* Buttons */
.btn {
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    transition: var(--transition);
    border: none;
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

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

.btn:active {
    transform: translateY(0);
}

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

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

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

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #c82333 100%);
    color: white;
}

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

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

/* Forms */
.form-control,
.form-select {
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--border-color);
    padding: 0.75rem 1rem;
    transition: var(--transition);
    font-size: 0.95rem;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(145, 70, 255, 0.15);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.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 0.2rem rgba(145, 70, 255, 0.15);
}

/* Alerts */
.alert {
    border-radius: var(--border-radius-sm);
    border: none;
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
}

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

/* List Groups */
.list-group-item {
    border-radius: var(--border-radius-sm) !important;
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    padding: 1rem 1.25rem;
}

.list-group-item:hover {
    background: var(--bg-hover);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.list-group-item.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-color: var(--primary-color);
    color: white;
}

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

.pagination .page-link {
    border-radius: var(--border-radius-sm);
    margin: 0 0.25rem;
    color: var(--primary-color);
    border: 2px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    transition: var(--transition);
}

.pagination .page-link:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.pagination .page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-color: var(--primary-color);
    color: white;
    box-shadow: var(--shadow);
}

/* Code */
code {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.875em;
    color: var(--primary-color);
    font-weight: 600;
}

/* Login Page */
.login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-page .card {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 450px;
    width: 100%;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.login-page .card-body {
    padding: 2.5rem;
}

.login-page h2 {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Loading Spinner */
.spinner-border {
    width: 3rem;
    height: 3rem;
    border-width: 0.3em;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.15em;
}

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

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Status Indicators */
.status-indicator {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 0.5rem;
    animation: pulse 2s infinite;
}

.status-indicator.online {
    background: var(--success-color);
    box-shadow: 0 0 10px var(--success-color);
}

.status-indicator.offline {
    background: var(--danger-color);
    box-shadow: 0 0 10px var(--danger-color);
}

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

::-webkit-scrollbar-track {
    background: var(--bg-light);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 10px;
}

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

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h5 {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .container-fluid {
        padding: 1rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .stat-card h2 {
        font-size: 2rem;
    }
    
    .stat-card i {
        font-size: 2rem;
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    .table thead th,
    .table tbody td {
        padding: 0.75rem 1rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .nav-link {
        padding: 0.5rem !important;
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .stat-card {
        padding: 1rem;
    }
    
    .stat-card h2 {
        font-size: 1.75rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .card-header {
        padding: 1rem;
        font-size: 1rem;
    }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    /* Can be implemented if needed */
}

/* Print styles */
@media print {
    .navbar,
    .btn,
    .pagination {
        display: none;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}