/* ============================================
   ADMIN PANEL - PROFESSIONAL DESIGN SYSTEM
   ============================================ */

/* CSS Variables for Theme Consistency */
:root {
    --admin-primary: #2563eb;
    --admin-primary-dark: #1e40af;
    --admin-primary-light: #3b82f6;
    --admin-secondary: #64748b;
    --admin-success: #10b981;
    --admin-danger: #ef4444;
    --admin-warning: #f59e0b;
    --admin-info: #06b6d4;
    
    --admin-bg-primary: #f8fafc;
    --admin-bg-secondary: #ffffff;
    --admin-bg-hover: #f1f5f9;
    --admin-border: #e2e8f0;
    --admin-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
    --admin-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    
    --admin-text-primary: #0f172a;
    --admin-text-secondary: #475569;
    --admin-text-muted: #94a3b8;
    
    --sidebar-width: 260px;
    --header-height: 70px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --admin-bg-primary: #0f172a;
        --admin-bg-secondary: #1e293b;
        --admin-bg-hover: #334155;
        --admin-border: #334155;
        --admin-text-primary: #f1f5f9;
        --admin-text-secondary: #cbd5e1;
        --admin-text-muted: #64748b;
    }
}

/* ============================================
   BASE LAYOUT
   ============================================ */

.admin-container {
    min-height: 100vh;
    background: var(--admin-bg-primary);
    padding: 20px;
}

.admin-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    gap: 24px;
    max-width: 1600px;
    margin: 0 auto;
}

/* ============================================
   SIDEBAR NAVIGATION
   ============================================ */

.admin-sidebar {
    background: var(--admin-bg-secondary);
    border-radius: 12px;
    padding: 24px;
    height: fit-content;
    position: sticky;
    top: 20px;
    box-shadow: var(--admin-shadow);
    border: 1px solid var(--admin-border);
}

.admin-sidebar h2 {
    color: var(--admin-text-primary);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--admin-border);
}

.admin-sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.admin-sidebar ul li {
    margin-bottom: 8px;
}

.admin-sidebar ul li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--admin-text-secondary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.admin-sidebar ul li a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--admin-primary);
    transform: scaleY(0);
    transition: var(--transition);
}

.admin-sidebar ul li a:hover {
    background: var(--admin-bg-hover);
    color: var(--admin-primary);
    transform: translateX(4px);
}

.admin-sidebar ul li a.active {
    background: linear-gradient(135deg, var(--admin-primary) 0%, var(--admin-primary-light) 100%);
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.admin-sidebar ul li a.active::before {
    transform: scaleY(1);
}

.admin-sidebar ul li a i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */

.admin-content {
    background: var(--admin-bg-secondary);
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--admin-shadow);
    border: 1px solid var(--admin-border);
    min-height: calc(100vh - 40px);
}

.admin-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 2px solid var(--admin-border);
}

.admin-header h1 {
    color: var(--admin-text-primary);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.admin-header h1 i {
    color: var(--admin-primary);
    font-size: 1.8rem;
}

.admin-header p {
    color: var(--admin-text-secondary);
    font-size: 1rem;
    margin: 0;
}

/* ============================================
   STATISTICS CARDS
   ============================================ */

.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: linear-gradient(135deg, var(--admin-primary) 0%, var(--admin-primary-light) 100%);
    color: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--admin-shadow-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.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(-4px);
    box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.2);
}

.stat-card:hover::before {
    top: -25%;
    right: -25%;
}

.stat-card h3 {
    margin: 0 0 12px 0;
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
}

.stat-card:nth-child(2) {
    background: linear-gradient(135deg, var(--admin-success) 0%, #059669 100%);
}

.stat-card:nth-child(3) {
    background: linear-gradient(135deg, var(--admin-warning) 0%, #d97706 100%);
}

.stat-card:nth-child(4) {
    background: linear-gradient(135deg, var(--admin-info) 0%, #0891b2 100%);
}

/* ============================================
   ALERTS & MESSAGES
   ============================================ */

.alert {
    padding: 16px 20px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 4px solid;
    animation: slideInDown 0.3s ease-out;
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert::before {
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 1.2rem;
}

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

.alert-success::before {
    content: "\f058";
    color: var(--admin-success);
}

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

.alert-error::before {
    content: "\f06a";
    color: var(--admin-danger);
}

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

.form-container {
    background: var(--admin-bg-primary);
    padding: 32px;
    border-radius: 12px;
    margin-bottom: 32px;
    border: 1px solid var(--admin-border);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--admin-text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group label i {
    color: var(--admin-primary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="url"],
.form-group input[type="file"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--admin-border);
    border-radius: 8px;
    font-size: 1rem;
    color: var(--admin-text-primary);
    background: var(--admin-bg-secondary);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--admin-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group small {
    display: block;
    margin-top: 6px;
    color: var(--admin-text-muted);
    font-size: 0.875rem;
}

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

.btn-primary,
.btn-delete {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--admin-primary) 0%, var(--admin-primary-light) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(37, 99, 235, 0.4);
}

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

.btn-delete {
    background: linear-gradient(135deg, var(--admin-danger) 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
    width: 100%;
    justify-content: center;
}

.btn-delete:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(239, 68, 68, 0.4);
}

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

.admin-table {
    background: var(--admin-bg-primary);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--admin-border);
    margin-top: 32px;
}

.admin-table h2 {
    padding: 20px 24px;
    margin: 0;
    background: var(--admin-bg-secondary);
    color: var(--admin-text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    border-bottom: 2px solid var(--admin-border);
}

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

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

.admin-table th {
    padding: 16px 24px;
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-table td {
    padding: 16px 24px;
    border-bottom: 1px solid var(--admin-border);
    color: var(--admin-text-primary);
}

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

.admin-table tbody tr:hover {
    background: var(--admin-bg-hover);
}

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

.admin-table td img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    vertical-align: middle;
    margin-right: 12px;
    border: 2px solid var(--admin-border);
}

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

.card {
    background: var(--admin-bg-secondary);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--admin-border);
    box-shadow: var(--admin-shadow);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1200px) {
    :root {
        --sidebar-width: 220px;
    }
    
    .admin-layout {
        gap: 20px;
    }
}

@media (max-width: 992px) {
    .admin-layout {
        grid-template-columns: 1fr;
    }
    
    .admin-sidebar {
        position: static;
        width: 100%;
    }
    
    .admin-sidebar ul {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 8px;
    }
    
    .admin-sidebar h2 {
        text-align: center;
    }
}

@media (max-width: 768px) {
    .admin-container {
        padding: 12px;
    }
    
    .admin-content {
        padding: 20px;
    }
    
    .admin-stats {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: 12px;
    }
    
    .stat-card {
        padding: 16px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .admin-header h1 {
        font-size: 1.5rem;
    }
    
    .form-container {
        padding: 20px;
    }
    
    .admin-table {
        overflow-x: auto;
    }
    
    .admin-table table {
        min-width: 600px;
    }
}

@media (max-width: 576px) {
    .admin-sidebar ul {
        grid-template-columns: 1fr;
    }
    
    .admin-stats {
        grid-template-columns: 1fr;
    }
    
    .admin-header h1 {
        font-size: 1.25rem;
    }
    
    .admin-header p {
        font-size: 0.9rem;
    }
}