.stat-card{transition:all .3s}.stat-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.08)}.search-box{position:relative;flex:1 1;max-width:400px}.search-box svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-tertiary)}.search-box input{width:100%;padding:12px 16px 12px 44px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:10px;color:var(--text-primary);font-size:14px;transition:all .2s}.search-box input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(255,122,24,.1)}.search-box input::placeholder{color:var(--text-tertiary)}.filter-tabs{display:flex;gap:8px;flex-wrap:wrap}.filter-tabs button{padding:10px 20px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:10px;color:var(--text-secondary);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}.filter-tabs button.active{background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-color:var(--primary);color:#fff}.filter-tabs button:hover:not(.active){background:var(--bg-tertiary);border-color:var(--primary)}.admin-table-container{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;overflow:hidden;margin-bottom:24px}.admin-table-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border-color)}.admin-table-header h3{font-size:18px;font-weight:600;color:var(--text-primary);margin:0}.admin-table-actions{display:flex;gap:12px}.admin-table{width:100%;border-collapse:collapse}.admin-table td,.admin-table th{padding:16px 24px;text-align:left;border-bottom:1px solid var(--border-color)}.admin-table th{font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;background:var(--bg-tertiary)}.admin-table td{font-size:14px;color:var(--text-primary)}.admin-table tr:last-child td{border-bottom:none}.admin-table tbody tr:hover{background:var(--bg-tertiary)}.user-cell{display:flex;align-items:center;gap:12px}.user-avatar-small{width:36px;height:36px;border-radius:10px;font-weight:600;font-size:14px;flex-shrink:0}.user-avatar-large,.user-avatar-small{background:linear-gradient(135deg,var(--primary),var(--primary-dark));display:flex;align-items:center;justify-content:center;color:#fff}.user-avatar-large{width:80px;height:80px;border-radius:20px;font-weight:700;font-size:32px;margin:0 auto 16px}.status-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:500}.status-badge.pending{background:rgba(245,158,11,.1);color:#f59e0b}.status-badge.approved{background:rgba(34,197,94,.1);color:#22c55e}.status-badge.rejected{background:rgba(239,68,68,.1);color:#ef4444}.status-badge.none{background:rgba(148,163,184,.1);color:#94a3b8}.plan-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:500;text-transform:capitalize}.plan-badge.free{background:rgba(168,85,247,.1);color:#a855f7}.plan-badge.student{background:rgba(34,197,94,.1);color:#22c55e}.type-badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:16px;font-size:12px;font-weight:500}.type-badge.upgrade{background:rgba(34,197,94,.1);color:#22c55e}.type-badge.downgrade{background:rgba(239,68,68,.1);color:#ef4444}.action-btn{padding:8px 16px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:8px;color:var(--text-primary);font-size:13px;font-weight:500;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:6px;text-decoration:none}.action-btn:hover{background:var(--primary);border-color:var(--primary);color:#fff}.action-btn.danger:hover{background:#ef4444;border-color:#ef4444}.action-btn.success:hover{background:#22c55e;border-color:#22c55e}.empty-state{text-align:center;padding:80px 20px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;color:var(--text-secondary)}.empty-state.small{padding:40px 20px}.empty-state svg{width:64px;height:64px;margin-bottom:16px;opacity:.5;color:var(--text-tertiary)}.empty-state h3{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.empty-state p{font-size:14px;margin:0}.admin-filters{display:flex;gap:16px;margin-bottom:24px;flex-wrap:wrap;align-items:center}.admin-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:9999;padding:20px;animation:fadeIn .2s}.admin-modal{background:var(--bg-primary);border-radius:20px;max-width:500px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,.3);animation:slideUp .3s}.admin-modal.large{max-width:800px}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border-color)}.modal-header h2{font-size:20px;font-weight:700;color:var(--text-primary);margin:0}.modal-header button{background:var(--bg-tertiary);border:1px solid var(--border-color);color:var(--text-secondary);padding:8px;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.modal-header button:hover{background:var(--bg-hover);color:var(--text-primary)}.modal-content{padding:24px}.modal-user-info{text-align:center;padding-bottom:24px;border-bottom:1px solid var(--border-color);margin-bottom:24px}.modal-user-info h3{font-size:20px;font-weight:700;color:var(--text-primary);margin:0 0 4px}.modal-user-info p{font-size:14px;color:var(--text-secondary);margin:0}.modal-details{display:flex;flex-direction:column;gap:12px;margin-bottom:24px}.detail-row{display:flex;align-items:center;justify-content:space-between;padding:12px;background:var(--bg-secondary);border-radius:10px}.detail-row span:first-child{font-size:14px;color:var(--text-secondary);font-weight:500}.modal-actions{margin-bottom:24px}.modal-actions h4{font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:12px}.plan-buttons{display:flex;gap:12px}.plan-btn{flex:1 1;padding:12px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:10px;color:var(--text-primary);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}.plan-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.plan-btn:hover:not(.active){background:var(--bg-tertiary);border-color:var(--primary)}.delete-btn{width:100%;padding:12px;background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.2);border-radius:10px;color:#ef4444;font-size:14px;font-weight:500;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:all .2s}.delete-btn:hover{background:#ef4444;border-color:#ef4444;color:#fff}.verification-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));grid-gap:20px;gap:20px}.verification-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:20px;cursor:pointer;transition:all .2s}.verification-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.1);border-color:var(--primary)}.verification-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:16px}.user-info{display:flex;align-items:center;gap:12px}.user-info h3{font-size:16px;font-weight:600;color:var(--text-primary);margin:0 0 2px}.user-info p{font-size:13px;color:var(--text-secondary);margin:0}.verification-details{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}.detail{display:flex;align-items:center;justify-content:space-between;font-size:13px}.detail .label{color:var(--text-secondary)}.detail .value{color:var(--text-primary);font-weight:500}.verification-preview{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:12px;gap:12px}.verification-preview img{width:100%;height:120px;object-fit:cover;border-radius:10px;border:1px solid var(--border-color)}.verification-review{display:flex;flex-direction:column;gap:24px}.review-actions h3,.review-documents h3,.review-info h3,.review-note h3{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:16px}.info-grid{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:12px;gap:12px}.info-item{padding:12px;background:var(--bg-secondary);border-radius:10px}.info-item .label{display:block;font-size:12px;color:var(--text-secondary);margin-bottom:4px}.info-item .value{display:block;font-size:14px;color:var(--text-primary);font-weight:500}.document-grid{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:16px;gap:16px}.document-item{text-align:center}.document-item span{display:block;font-size:13px;color:var(--text-secondary);margin-bottom:10px;font-weight:500}.document-item img{height:250px;object-fit:cover;border-radius:12px}.document-item img,.review-actions textarea{width:100%;border:1px solid var(--border-color)}.review-actions textarea{min-height:100px;padding:14px;background:var(--bg-secondary);border-radius:10px;color:var(--text-primary);font-size:14px;font-family:inherit;resize:vertical;margin-bottom:16px}.review-actions textarea:focus{outline:none;border-color:var(--primary)}.action-buttons{display:flex;gap:12px}.approve-btn,.reject-btn{flex:1 1;padding:14px 20px;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:all .2s}.reject-btn{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.2);color:#ef4444}.reject-btn:hover:not(:disabled){background:#ef4444;border-color:#ef4444;color:#fff}.approve-btn{background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.2);color:#22c55e}.approve-btn:hover:not(:disabled){background:#22c55e;border-color:#22c55e;color:#fff}.approve-btn:disabled,.reject-btn:disabled{opacity:.5;cursor:not-allowed}.review-note{padding:16px;background:var(--bg-secondary);border-radius:10px}.review-note p{font-size:14px;color:var(--text-secondary);line-height:1.6;margin:0}.billing-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));grid-gap:20px;gap:20px;margin-bottom:32px}.billing-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:24px;gap:16px}.billing-card,.billing-icon{display:flex;align-items:center}.billing-icon{width:52px;height:52px;border-radius:14px;justify-content:center;flex-shrink:0}.billing-card.revenue .billing-icon{background:rgba(34,197,94,.1);color:#22c55e}.billing-card.monthly .billing-icon{background:rgba(59,130,246,.1);color:#3b82f6}.billing-card.student .billing-icon{background:rgba(168,85,247,.1);color:#a855f7}.billing-card.free .billing-icon{background:rgba(245,158,11,.1);color:#f59e0b}.billing-info{display:flex;flex-direction:column;gap:4px}.billing-value{font-size:28px;font-weight:700;color:var(--text-primary);line-height:1}.billing-label{font-size:13px;color:var(--text-secondary)}.plan-distribution{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:24px}.distribution-bar{display:flex;height:60px;border-radius:12px;overflow:hidden;margin-bottom:20px}.bar-segment{display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:14px;transition:all .3s}.bar-segment.student{background:linear-gradient(135deg,#22c55e,#16a34a)}.bar-segment.free{background:linear-gradient(135deg,#a855f7,#9333ea)}.distribution-legend{display:flex;gap:24px;justify-content:center}.legend-item{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-secondary)}.legend-color{width:16px;height:16px;border-radius:4px}.legend-color.student{background:linear-gradient(135deg,#22c55e,#16a34a)}.legend-color.free{background:linear-gradient(135deg,#a855f7,#9333ea)}.billing-note{display:flex;gap:12px;padding:16px 20px;background:rgba(59,130,246,.1);border:1px solid rgba(59,130,246,.2);border-radius:12px;margin-top:24px}.billing-note svg{color:#3b82f6;flex-shrink:0}.billing-note p{font-size:14px;color:var(--text-secondary);line-height:1.6;margin:0}.billing-note strong{color:var(--text-primary)}.payment-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));grid-gap:20px;gap:20px}.payment-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:20px;cursor:pointer;transition:all .2s}.payment-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.1);border-color:var(--primary)}.payment-card-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:16px}.payment-card-details{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:12px;gap:12px;margin-bottom:16px}.payment-card-details .detail{display:flex;flex-direction:column;gap:4px}.payment-card-details .label{font-size:11px;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.5px}.payment-card-details .value{font-size:14px;color:var(--text-primary);font-weight:500}.ai-analysis{margin-bottom:24px}.ai-analysis h3{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:12px}.ai-result{background:var(--bg-tertiary);border-radius:12px;padding:16px}.ai-confidence{display:flex;align-items:center;gap:12px;margin-bottom:12px}.ai-confidence>span:first-child{font-size:13px;color:var(--text-secondary)}.confidence-bar{flex:1 1;height:8px;background:var(--bg-secondary);border-radius:4px;overflow:hidden}.confidence-fill{height:100%;background:linear-gradient(90deg,#22c55e,#16a34a);border-radius:4px;transition:width .3s}.ai-confidence>span:last-child{font-size:14px;font-weight:600;color:#22c55e}.ai-note{font-size:13px;color:var(--text-secondary);line-height:1.5;margin:0}.review-receipt{margin-bottom:24px}.review-receipt h3{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:12px}.receipt-image{border-radius:12px;overflow:hidden;border:1px solid var(--border-color);text-align:center;background:var(--bg-tertiary)}.receipt-image img{max-width:100%;max-height:400px;object-fit:contain}.payment-review{display:flex;flex-direction:column;gap:24px}.admin-header{justify-content:space-between;gap:20px;padding:24px 32px;background:var(--bg-secondary);position:-webkit-sticky;position:sticky;top:0;z-index:100}.header-title h1{font-size:24px;font-weight:700;color:var(--text-primary);margin:0}.header-subtitle{font-size:13px;color:var(--text-tertiary);margin:4px 0 0;display:flex;align-items:center;gap:8px}.refreshing-indicator{color:var(--primary);font-weight:500;animation:pulse 1.5s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.refresh-btn{display:flex;align-items:center;gap:8px;padding:10px 16px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:8px;color:var(--text-secondary);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}.refresh-btn:hover:not(:disabled){background:var(--primary);border-color:var(--primary);color:#fff}.refresh-btn:disabled{opacity:.6;cursor:not-allowed}.refresh-btn svg.spinning{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.metrics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));grid-gap:20px;gap:20px;margin-bottom:32px}.metric-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:24px;display:flex;align-items:flex-start;gap:16px;transition:all .3s;position:relative;overflow:hidden}.metric-card:before{content:"";position:absolute;top:0;left:0;width:4px;height:100%;background:var(--primary);opacity:0;transition:opacity .3s}.metric-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.1)}.metric-card:hover:before{opacity:1}.metric-card.primary{border-top:3px solid #ff7a18}.metric-card.success{border-top:3px solid #22c55e}.metric-card.warning{border-top:3px solid #f59e0b}.metric-card.info{border-top:3px solid #3b82f6}.metric-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.metric-card.primary .metric-icon{background:rgba(255,122,24,.1);color:#ff7a18}.metric-card.success .metric-icon{background:rgba(34,197,94,.1);color:#22c55e}.metric-card.warning .metric-icon{background:rgba(245,158,11,.1);color:#f59e0b}.metric-card.info .metric-icon{background:rgba(59,130,246,.1);color:#3b82f6}.metric-info{flex:1 1;display:flex;flex-direction:column;gap:4px}.metric-value{font-size:32px;font-weight:700;color:var(--text-primary);line-height:1}.metric-label{font-size:13px;color:var(--text-tertiary);font-weight:500;text-transform:uppercase;letter-spacing:.5px}.metric-change{font-size:12px;color:var(--text-secondary);margin-top:4px}.metric-change.positive{color:#22c55e}.metric-change.negative{color:#ef4444}.metric-link{font-size:13px;color:var(--primary);font-weight:500;text-decoration:none;margin-top:8px;display:inline-block}.metric-link:hover{text-decoration:underline}.charts-grid{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:24px;gap:24px;margin-bottom:32px}.chart-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:24px}.chart-card.small{grid-column:span 1}.chart-header{margin-bottom:20px;display:flex;align-items:center;justify-content:space-between}.chart-header h3{font-size:16px;font-weight:600;color:var(--text-primary);margin:0}.activity-section{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:24px;margin-bottom:32px}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.section-header h2{font-size:18px;font-weight:600;color:var(--text-primary);margin:0}.view-all-link{font-size:14px;color:var(--primary);text-decoration:none;font-weight:500}.view-all-link:hover{text-decoration:underline}.activity-list{display:flex;flex-direction:column;gap:12px}.activity-item{display:flex;align-items:center;gap:16px;padding:16px;background:var(--bg-tertiary);border-radius:12px;transition:all .2s}.activity-item:hover{background:var(--bg-primary);transform:translateX(4px)}.activity-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.activity-icon.user{background:rgba(59,130,246,.1);color:#3b82f6}.activity-icon.payment{background:rgba(34,197,94,.1);color:#22c55e}.activity-icon.verification{background:rgba(245,158,11,.1);color:#f59e0b}.activity-details{flex:1 1}.activity-user{font-size:14px;font-weight:600;color:var(--text-primary);margin:0 0 4px}.activity-desc{font-size:13px;color:var(--text-secondary);margin:0}.activity-time{font-size:12px;color:var(--text-tertiary);white-space:nowrap}.quick-actions-section{margin-bottom:32px}.quick-actions-section h2{font-size:18px;font-weight:600;color:var(--text-primary);margin:0 0 20px}.quick-actions-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:16px;gap:16px}.action-card{border-radius:12px;transition:all .3s;position:relative;overflow:hidden}.action-card:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,var(--primary) 0,transparent 100%);opacity:0;transition:opacity .3s}.action-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.1)}.action-card:hover:before{opacity:.05}.action-icon{position:relative;z-index:1}.action-icon.verify{background:rgba(245,158,11,.1);color:#f59e0b}.action-icon.payment{background:rgba(34,197,94,.1);color:#22c55e}.action-icon.users{background:rgba(59,130,246,.1);color:#3b82f6}.action-icon.analytics{background:rgba(139,92,246,.1);color:#8b5cf6}.action-info{flex:1 1;position:relative;z-index:1}.action-info h3{margin:0 0 4px}.action-arrow{color:var(--text-tertiary);flex-shrink:0;transition:transform .3s;position:relative;z-index:1}.action-card:hover .action-arrow{transform:translateX(4px);color:var(--primary)}@media (max-width:1200px){.charts-grid{grid-template-columns:1fr}.chart-card.small{grid-column:span 1}}@media (max-width:768px){.admin-header{padding:16px 20px;flex-wrap:wrap}.header-title{order:2;width:100%}.refresh-btn{order:3}.metrics-grid,.quick-actions-grid{grid-template-columns:1fr}.activity-item{flex-direction:column;align-items:flex-start}.activity-time{align-self:flex-end}}@media (max-width:480px){.metric-value{font-size:24px}.metric-icon{width:40px;height:40px}.chart-card{padding:16px}.refresh-btn span{display:none}}.maintenance-page{position:relative;overflow:hidden}.maintenance-icon svg{color:var(--primary);animation:wrench-spin 3s ease-in-out infinite}@keyframes wrench-spin{0%,to{transform:rotate(0deg)}25%{transform:rotate(-15deg)}75%{transform:rotate(15deg)}}.maintenance-content{max-width:600px;width:100%;text-align:center;position:relative;z-index:1}.maintenance-message{font-size:16px;color:var(--text-secondary);line-height:1.6;max-width:500px;margin:0 auto 24px}.maintenance-eta{display:flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;background:rgba(59,130,246,.1);border:1px solid rgba(59,130,246,.2);border-radius:10px;color:#3b82f6;font-size:14px;font-weight:500;margin-bottom:32px}.maintenance-eta svg{flex-shrink:0}.maintenance-actions{display:flex;gap:12px;justify-content:center;margin-bottom:32px}.maintenance-contact{text-align:center;padding:20px;background:var(--bg-tertiary);border-radius:12px;margin-bottom:24px}.maintenance-contact p{font-size:14px;color:var(--text-secondary);margin:0 0 8px}.maintenance-contact a{font-size:16px;font-weight:500}.maintenance-footer{text-align:center;padding-top:24px;border-top:1px solid var(--border-color)}.maintenance-footer p{font-size:13px;color:var(--text-tertiary);margin:0}@media (max-width:640px){.maintenance-icon{width:100px;height:100px;margin-bottom:24px}.maintenance-content{padding:32px 24px}.maintenance-message{font-size:15px}.maintenance-actions,.maintenance-eta{flex-direction:column;align-items:stretch}}.admin-layout{min-height:100vh;display:flex;background:var(--bg-primary)}.admin-sidebar{width:260px;background:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0;transition:all .3s ease}.admin-sidebar.closed{width:0;overflow:hidden;border-right:none}.admin-sidebar-header{padding:20px;border-bottom:1px solid var(--border-color)}.admin-sidebar-header .admin-logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text-primary);font-size:18px;font-weight:700}.admin-sidebar-header .logo-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:10px;display:flex;align-items:center;justify-content:center}.admin-sidebar-header .logo-icon svg{width:22px;height:22px;color:#fff}.admin-nav{flex:1 1;padding:16px 12px;display:flex;flex-direction:column;gap:4px}.admin-nav-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:10px;color:var(--text-secondary);text-decoration:none;font-size:14px;font-weight:500;transition:all .2s;cursor:pointer;border:none;background:transparent;width:100%;text-align:left}.admin-nav-item:hover{background:var(--bg-tertiary);color:var(--text-primary)}.admin-nav-item.active{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff}.admin-nav-item.logout:hover{background:rgba(239,68,68,.1);color:#ef4444}.nav-badge{margin-left:auto;padding:2px 8px;background:#ef4444;color:#fff;font-size:11px;font-weight:600;border-radius:10px}.admin-sidebar-footer{padding:16px 12px;border-top:1px solid var(--border-color);display:flex;flex-direction:column;gap:4px}.admin-main{flex:1 1;display:flex;flex-direction:column;min-width:0}.admin-header{gap:16px;padding:20px 24px;border-bottom:1px solid var(--border-color);background:var(--bg-primary)}.admin-header,.admin-menu-btn{display:flex;align-items:center}.admin-menu-btn{background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-secondary);padding:10px;border-radius:10px;cursor:pointer;justify-content:center;transition:all .2s}.admin-menu-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.admin-header h1{font-size:24px;font-weight:700;color:var(--text-primary);margin:0}.admin-content{flex:1 1;padding:24px;overflow-y:auto}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:20px;gap:20px;margin-bottom:32px}.stat-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:24px;gap:16px}.stat-card,.stat-icon{display:flex;align-items:center}.stat-icon{width:52px;height:52px;border-radius:14px;justify-content:center;flex-shrink:0}.stat-icon.users{background:rgba(59,130,246,.1);color:#3b82f6}.stat-icon.students{background:rgba(34,197,94,.1);color:#22c55e}.stat-icon.free{background:rgba(168,85,247,.1);color:#a855f7}.stat-icon.pending{background:rgba(245,158,11,.1);color:#f59e0b}.stat-icon.today{background:rgba(236,72,153,.1);color:#ec4899}.stat-icon.active{background:rgba(20,184,166,.1);color:#14b8a6}.stat-info{display:flex;flex-direction:column;gap:4px}.stat-value{font-size:28px;font-weight:700;color:var(--text-primary);line-height:1}.stat-label{font-size:13px;color:var(--text-secondary)}.admin-section{margin-bottom:32px}.admin-section h2{font-size:20px;font-weight:600;color:var(--text-primary);margin-bottom:20px}.quick-actions{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:16px;gap:16px}.action-card{display:flex;align-items:center;gap:16px;padding:20px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:14px;text-decoration:none;transition:all .2s}.action-card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.1)}.action-icon{width:48px;height:48px;background:linear-gradient(135deg,rgba(255,122,24,.1),rgba(255,122,24,.05));border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--primary);flex-shrink:0}.action-info h3{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:4px}.action-info p{font-size:13px;color:var(--text-secondary);margin:0}.upgrade-page{padding:120px 20px 80px;min-height:100vh;background:var(--bg-primary)}.upgrade-container{max-width:640px;margin:0 auto}.upgrade-header{text-align:center;margin-bottom:40px}.upgrade-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;background:linear-gradient(135deg,rgba(255,122,24,.1),rgba(255,122,24,.05));border:1px solid rgba(255,122,24,.2);border-radius:20px;color:var(--primary);font-size:13px;font-weight:600;margin-bottom:20px}.upgrade-header h1{font-size:36px;font-weight:800;color:var(--text-primary);margin-bottom:12px}.upgrade-header p{font-size:16px;color:var(--text-secondary);line-height:1.6}.upgrade-error{gap:10px;padding:14px 18px;background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.2);border-radius:12px;color:#ef4444;font-size:14px;margin-bottom:24px}.upgrade-error,.upgrade-steps{display:flex;align-items:center}.upgrade-steps{justify-content:center;gap:0;margin-bottom:40px;padding:0 20px}.upgrade-step{flex-direction:column;gap:8px}.step-dot,.upgrade-step{display:flex;align-items:center}.step-dot{width:40px;height:40px;border-radius:50%;background:var(--bg-tertiary);border:2px solid var(--border-color);color:var(--text-secondary);font-size:14px;font-weight:600;justify-content:center;transition:all .3s}.upgrade-step.active .step-dot{background:var(--primary);border-color:var(--primary);color:#fff}.upgrade-step.completed .step-dot{background:#22c55e;border-color:#22c55e;color:#fff}.upgrade-step span{font-size:12px;font-weight:500;color:var(--text-secondary)}.upgrade-step.active span{color:var(--primary);font-weight:600}.upgrade-step.completed span{color:#22c55e}.step-line{width:60px;height:2px;background:var(--border-color);margin:0 8px 24px}.upgrade-form{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px;padding:32px}.upgrade-form .form-group{margin-bottom:20px}.upgrade-form .form-group label{display:block;font-size:14px;font-weight:500;color:var(--text-primary);margin-bottom:8px}.upgrade-form .form-group input{width:100%;padding:14px 16px;border:1px solid var(--border-color);border-radius:12px;background:var(--bg-primary);color:var(--text-primary);font-size:15px;transition:all .2s}.upgrade-form .form-group input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(255,122,24,.1)}.upgrade-form .form-group input::placeholder{color:var(--text-tertiary)}.upload-section{margin-bottom:24px}.upload-section h3{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.upload-section>p{font-size:14px;color:var(--text-secondary);margin-bottom:20px}.upload-grid{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:16px;gap:16px}.upload-card{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:32px 20px;background:var(--bg-primary);border:2px dashed var(--border-color);border-radius:16px;cursor:pointer;transition:all .2s;min-height:180px;text-align:center}.upload-card:hover{border-color:var(--primary);background:rgba(255,122,24,.02)}.upload-card .upload-icon{width:56px;height:56px;background:var(--bg-tertiary);border-radius:14px;display:flex;align-items:center;justify-content:center;color:var(--primary)}.upload-card span{font-size:14px;font-weight:500;color:var(--text-primary)}.upload-card .upload-hint{font-size:12px;color:var(--text-tertiary);font-weight:400}.upload-card .upload-preview{width:100%;max-height:150px;object-fit:cover;border-radius:10px}.form-actions{display:flex;gap:12px;margin-top:24px}.form-actions .btn-secondary{flex:1 1}.form-actions .btn-primary{flex:2 1}.review-section h3{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:20px}.review-card{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:12px;overflow:hidden;margin-bottom:20px}.review-row{display:flex;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border-color)}.review-row:last-child{border-bottom:none}.review-label{font-size:14px;color:var(--text-secondary)}.review-value{font-size:14px;font-weight:500;color:var(--text-primary)}.review-images{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:16px;gap:16px;margin-bottom:20px}.review-image{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:12px;padding:12px;text-align:center}.review-image span{display:block;font-size:12px;color:var(--text-secondary);margin-bottom:10px;font-weight:500}.review-image img{width:100%;max-height:120px;object-fit:cover;border-radius:8px}.review-notice{display:flex;gap:12px;padding:16px;background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.2);border-radius:12px}.review-notice svg{color:#22c55e;flex-shrink:0;margin-top:2px}.review-notice p{font-size:13px;color:var(--text-secondary);line-height:1.6;margin:0}.verification-result{text-align:center;padding:60px 40px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:24px}.verification-result .result-icon{width:100px;height:100px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 24px}.verification-result.success .result-icon{background:linear-gradient(135deg,rgba(34,197,94,.2),rgba(34,197,94,.1));color:#22c55e}.verification-result.pending .result-icon{background:linear-gradient(135deg,rgba(245,158,11,.2),rgba(245,158,11,.1));color:#f59e0b}.verification-result.processing .processing-spinner{width:100px;height:100px;position:relative;margin:0 auto 24px}.spinner-ring{position:absolute;width:100%;height:100%;border:3px solid var(--border-color);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}.spinner-icon{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:var(--primary)}.verification-result h1{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:12px}.verification-result p{font-size:16px;color:var(--text-secondary);line-height:1.6;margin-bottom:8px}.verification-result .result-note{font-size:14px;color:var(--text-tertiary)}.result-actions{display:flex;gap:16px;justify-content:center;margin-top:32px;flex-wrap:wrap}.upgrade-benefits{margin-top:40px;padding:32px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px}.upgrade-benefits h3{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:20px;text-align:center}.benefits-grid{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:12px;gap:12px}.benefit-item{display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:12px;font-size:14px;color:var(--text-primary)}.benefit-item svg{color:#22c55e;flex-shrink:0}.profile-modal{background:var(--bg-primary);border-radius:24px;max-width:480px;width:100%;box-shadow:0 25px 60px -12px rgba(0,0,0,.3);animation:popupSlideIn .4s ease-out;overflow:hidden;max-height:90vh;display:flex;flex-direction:column}.profile-modal-header{display:flex;justify-content:space-between;align-items:center;padding:24px 28px;border-bottom:1px solid var(--border-color);flex-shrink:0}.profile-modal-header h2{font-size:22px;font-weight:700;color:var(--text-primary);margin:0}.modal-close-btn{background:var(--bg-tertiary);border:none;color:var(--text-secondary);cursor:pointer;padding:10px;border-radius:10px;display:flex;align-items:center;justify-content:center;transition:all .2s}.modal-close-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.profile-modal-content{padding:28px;overflow-y:auto;flex:1 1}.profile-avatar-section{display:flex;flex-direction:column;align-items:center;margin-bottom:32px}.profile-avatar-large{width:90px;height:90px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:24px;display:flex;align-items:center;justify-content:center;color:#fff;margin-bottom:16px;box-shadow:0 8px 24px rgba(255,122,24,.3)}.profile-avatar-large svg{width:44px;height:44px}.profile-plan-badge{padding:8px 20px;background:var(--bg-tertiary);border-radius:24px;font-size:14px;font-weight:600;color:var(--text-secondary);border:1px solid var(--border-color)}.profile-form{display:flex;flex-direction:column;gap:20px}.profile-form .form-group{display:flex;flex-direction:column;gap:8px}.profile-form .form-group label{font-size:14px;font-weight:500;color:var(--text-secondary)}.profile-form .form-group input{padding:14px 16px;border:1px solid var(--border-color);border-radius:12px;background:var(--bg-secondary);color:var(--text-primary);font-size:15px;transition:all .2s}.profile-form .form-group input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(255,122,24,.1)}.profile-form .form-group input::placeholder{color:var(--text-tertiary)}.form-divider{font-size:14px;font-weight:600;color:var(--text-secondary);padding:16px 0 8px;margin-top:8px}.form-divider,.profile-modal-footer{border-top:1px solid var(--border-color)}.profile-modal-footer{display:flex;justify-content:flex-end;gap:12px;padding:20px 28px;background:var(--bg-secondary);flex-shrink:0}.profile-modal-footer .btn-primary,.profile-modal-footer .btn-secondary{padding:12px 24px}.maintenance-page{min-height:100vh;flex-direction:column;padding:40px 20px;background:var(--bg-primary);text-align:center}.maintenance-icon,.maintenance-page{display:flex;align-items:center;justify-content:center}.maintenance-icon{width:120px;height:120px;background:linear-gradient(135deg,rgba(255,122,24,.1),rgba(255,122,24,.05));border-radius:30px;color:var(--primary);margin-bottom:32px}.maintenance-icon svg{width:60px;height:60px}.maintenance-page h1{font-size:36px;font-weight:800;color:var(--text-primary);margin-bottom:16px}.maintenance-page p{font-size:18px;color:var(--text-secondary);max-width:500px;margin-bottom:32px;line-height:1.6}.maintenance-contact{font-size:14px;color:var(--text-tertiary)}.maintenance-contact a{color:var(--primary);text-decoration:none}.maintenance-contact a:hover{text-decoration:underline}@media (max-width:768px){.admin-container{padding:80px 16px 40px}.admin-header{flex-direction:column;align-items:flex-start}.admin-tabs{width:100%;padding-bottom:8px}.admin-table-container,.admin-tabs{overflow-x:auto}.admin-table{min-width:600px}.upgrade-page{padding:100px 16px 60px}.upgrade-header h1{font-size:28px}.upgrade-steps{padding:0}.step-line{width:40px}.step-dot{width:36px;height:36px;font-size:13px}.upgrade-form{padding:24px}.upload-grid{grid-template-columns:1fr}.upload-card{min-height:140px;padding:24px}.form-actions{flex-direction:column}.form-actions .btn-primary,.form-actions .btn-secondary{width:100%;flex:unset}.benefits-grid,.review-images{grid-template-columns:1fr}.verification-result{padding:40px 24px}.verification-result h1{font-size:24px}.result-actions{flex-direction:column;align-items:center}.result-actions .btn-primary,.result-actions .btn-secondary{width:100%;max-width:280px}.profile-modal{max-width:100%;max-height:100vh;border-radius:0;height:100%}.profile-modal-header{padding:20px}.profile-modal-header h2{font-size:20px}.profile-modal-content{padding:20px}.profile-avatar-large{width:80px;height:80px}.profile-avatar-large svg{width:40px;height:40px}.profile-modal-footer{padding:16px 20px;flex-direction:column}.profile-modal-footer .btn-primary,.profile-modal-footer .btn-secondary{width:100%}}@media (max-width:480px){.upgrade-header h1{font-size:24px}.upgrade-badge{font-size:12px;padding:6px 12px}.step-line{width:24px}.upgrade-step span{font-size:11px}.upgrade-form{padding:20px}.upgrade-benefits{padding:24px}.benefit-item{padding:12px 14px;font-size:13px}}.admin-login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:linear-gradient(135deg,var(--bg-secondary) 0,var(--bg-primary) 100%)}.admin-login-container{width:100%;max-width:440px;display:flex;flex-direction:column;align-items:center}.admin-login-card{width:100%;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:24px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.15)}.admin-login-header{background:linear-gradient(135deg,#1e3a5f,#0d1b2a);padding:32px;display:flex;flex-direction:column;align-items:center;gap:16px}.admin-logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:#fff;font-size:22px;font-weight:700}.admin-logo .logo-icon{width:44px;height:44px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:12px;display:flex;align-items:center;justify-content:center}.admin-logo .logo-icon svg{width:26px;height:26px;color:#fff}.admin-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;background:hsla(0,0%,100%,.1);border:1px solid hsla(0,0%,100%,.2);border-radius:20px;color:hsla(0,0%,100%,.9);font-size:13px;font-weight:500}.admin-login-body{padding:32px}.admin-login-body h1{font-size:26px;font-weight:700;color:var(--text-primary);margin-bottom:8px;text-align:center}.admin-login-body>p{font-size:14px;color:var(--text-secondary);text-align:center;margin-bottom:28px}.admin-error{display:flex;align-items:center;gap:10px;padding:14px 16px;background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.2);border-radius:12px;color:#ef4444;font-size:14px;margin-bottom:20px}.admin-login-form{display:flex;flex-direction:column;gap:20px}.admin-login-form .form-group{display:flex;flex-direction:column;gap:8px}.admin-login-form .form-group label{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:500;color:var(--text-secondary)}.admin-login-form .form-group label svg{opacity:.7}.admin-login-form .form-group input{width:100%;padding:14px 16px;border:1px solid var(--border-color);border-radius:12px;background:var(--bg-secondary);color:var(--text-primary);font-size:15px;transition:all .2s}.admin-login-form .form-group input:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px rgba(59,130,246,.1)}.admin-login-form .form-group input::placeholder{color:var(--text-tertiary)}.admin-submit-btn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;padding:16px 24px;background:linear-gradient(135deg,#3b82f6,#1d4ed8);color:#fff;font-size:15px;font-weight:600;border:none;border-radius:12px;cursor:pointer;transition:all .2s;margin-top:8px}.admin-submit-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 16px rgba(59,130,246,.4)}.admin-submit-btn:disabled{opacity:.7;cursor:not-allowed}.admin-submit-btn .spinner{width:18px;height:18px;border:2px solid hsla(0,0%,100%,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}.admin-login-footer{justify-content:space-between;padding:20px 32px;background:var(--bg-secondary);border-top:1px solid var(--border-color)}.admin-login-footer,.back-link{display:flex;align-items:center}.back-link{gap:8px;font-size:14px;color:var(--text-secondary);text-decoration:none;transition:color .2s}.back-link:hover{color:var(--text-primary)}.admin-login-footer .theme-toggle{background:var(--bg-tertiary);border:1px solid var(--border-color);color:var(--text-secondary);padding:10px;border-radius:10px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.admin-login-footer .theme-toggle:hover{background:var(--bg-hover);color:var(--text-primary)}.admin-copyright{margin-top:24px;font-size:13px;color:var(--text-tertiary);text-align:center}@media (max-width:480px){.admin-login-body,.admin-login-header{padding:24px}.admin-login-body h1{font-size:22px}.admin-login-footer{padding:16px 24px}}.admin-hint{margin-top:20px;padding:12px 16px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:10px;text-align:center}.admin-hint p{font-size:12px;color:var(--text-tertiary);margin:0}.admin-hint code{background:var(--bg-secondary);padding:2px 6px;border-radius:4px;font-family:monospace;color:var(--text-secondary)}