:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    --sidebar-bg: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    --sidebar-width: 260px;
    --header-height: 64px;
    
    --card-bg: rgba(255, 255, 255, 0.9);
    --card-border: rgba(255, 255, 255, 0.2);
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --bg-light: #f8fafc;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: white;
    z-index: 1000;
    transition: transform 0.3s ease;
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-logo {
    font-size: 24px;
}

.sidebar-title {
    font-size: 16px;
    font-weight: 600;
}

.sidebar-subtitle {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-menu {
    padding: 15px 0;
}

.menu-section {
    padding: 10px 20px 5px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, 0.4);
    margin-top: 10px;
}

.menu-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.2s ease;
    gap: 12px;
    font-size: 14px;
}

.menu-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.menu-item.active {
    background: rgba(99, 102, 241, 0.3);
    color: white;
    border-left: 3px solid var(--primary);
}

.menu-item i {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

.menu-badge {
    margin-left: auto;
    background: var(--danger);
    color: white;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

/* ============================================
   HEADER
   ============================================ */
.header {
    position: sticky;
    top: 0;
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-secondary);
}

.page-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: none;
    background: var(--bg-light);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    position: relative;
}

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

.notification-dot {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 8px;
    height: 8px;
    background: var(--danger);
    border-radius: 50%;
}

.user-dropdown {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.2s ease;
}

.user-dropdown:hover {
    background: var(--bg-light);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.user-info {
    text-align: left;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.user-role {
    font-size: 11px;
    color: var(--text-muted);
}

/* ============================================
   CONTENT AREA
   ============================================ */
.content {
    padding: 24px;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
}

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

.breadcrumb a:hover {
    color: var(--primary);
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 24px;
}

.card-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-light);
    border-radius: 0 0 16px 16px;
}

/* ============================================
   STATS CARDS
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--card-shadow);
    display: flex;
    align-items: flex-start;
    gap: 16px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.stat-icon.primary { background: rgba(99, 102, 241, 0.1); color: var(--primary); }
.stat-icon.success { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.stat-icon.warning { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.stat-icon.danger { background: rgba(239, 68, 68, 0.1); color: var(--danger); }
.stat-icon.info { background: rgba(59, 130, 246, 0.1); color: var(--info); }

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-change {
    font-size: 12px;
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.stat-change.up { color: var(--success); }
.stat-change.down { color: var(--danger); }

/* ============================================
   TABLES
   ============================================ */
.table-responsive {
    overflow-x: auto;
}

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

.table th {
    text-align: left;
    padding: 14px 16px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

.table td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-primary);
}

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

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

/* ============================================
   BADGES
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-primary { background: rgba(99, 102, 241, 0.1); color: var(--primary); }
.badge-success, .bg-success { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.badge-warning, .bg-warning { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.badge-danger, .bg-danger { background: rgba(239, 68, 68, 0.1); color: var(--danger); }
.badge-info, .bg-info { background: rgba(59, 130, 246, 0.1); color: var(--info); }
.badge-secondary, .bg-secondary { background: rgba(100, 116, 139, 0.1); color: var(--secondary); }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 10px;
    border: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

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

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--bg-light);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

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

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
    color: white;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 14px;
    color: var(--text-primary);
    background: white;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    padding-right: 44px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-check-input {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

.form-check-input:checked {
    background: var(--primary);
    border-color: var(--primary);
}

.form-text {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px;
}

.form-error {
    font-size: 12px;
    color: var(--danger);
    margin-top: 6px;
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: 16px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #065f46;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #991b1b;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    color: #92400e;
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: #1e40af;
}

.alert-dismissible {
    position: relative;
    padding-right: 48px;
}

.btn-close {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    opacity: 0.5;
}

.btn-close:hover {
    opacity: 1;
}

/* ============================================
   LOGIN PAGE
   ============================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: white;
    border-radius: 24px;
    padding: 48px 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.login-logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.login-logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.login-logo p {
    font-size: 14px;
    color: var(--text-muted);
}

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

.login-form .btn-primary {
    width: 100%;
    padding: 14px;
    font-size: 16px;
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 13px;
    color: var(--text-muted);
}

/* ============================================
   MARKETPLACE CARDS
   ============================================ */
.marketplace-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.marketplace-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease;
}

.marketplace-card:hover {
    transform: translateY(-2px);
}

.marketplace-icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.marketplace-name {
    font-weight: 600;
    margin-bottom: 4px;
}

.marketplace-status {
    font-size: 12px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 991px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar-toggle {
        display: block;
    }
    
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }
    
    .sidebar-overlay.show {
        display: block;
    }
}

@media (max-width: 576px) {
    .content {
        padding: 16px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .header {
        padding: 0 16px;
    }
    
    .user-info {
        display: none;
    }
    
    .login-card {
        padding: 32px 24px;
    }
}

/* ============================================
   UTILITIES
   ============================================ */
.text-primary { color: var(--primary) !important; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--danger) !important; }
.text-muted { color: var(--text-muted) !important; }

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

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mb-5 { margin-bottom: 3rem !important; }

.mt-0 { margin-top: 0 !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }

.d-flex { display: flex !important; }
.align-items-center { align-items: center !important; }
.justify-content-between { justify-content: space-between !important; }
.gap-2 { gap: 0.5rem !important; }
.gap-3 { gap: 1rem !important; }

.w-100 { width: 100% !important; }

.text-center { text-align: center !important; }
.text-end { text-align: right !important; }

.fw-bold { font-weight: 700 !important; }
.fw-semibold { font-weight: 600 !important; }

.rounded { border-radius: 10px !important; }

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