:root{--bg: #0a0a0a;--surface: #141414;--surface-2: #1a1a1a;--surface-3: #222222;--fg: #ffffff;--muted: #888888;--muted-2: #555555;--border: #2a2a2a;--border-light: #333333;--accent: #3b82f6;--accent-hover: #2563eb;--accent-soft: rgba(59, 130, 246, .12);--status-pending: #f59e0b;--status-confirmed: #3b82f6;--status-cancelled: #ef4444;--status-attended: #22c55e;--radius: 10px;--radius-sm: 6px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--text-xs: 12px;--text-sm: 13px;--text-base: 14px;--text-lg: 16px;--text-xl: 20px;--text-2xl: 28px;--text-3xl: 36px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-sans);background:var(--bg);color:var(--fg);font-size:var(--text-base);line-height:1.5;-webkit-font-smoothing:antialiased}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--muted-2)}.app-layout{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;position:sticky;top:0;height:100vh}.sidebar-brand{padding:24px 20px 20px;display:flex;align-items:center;gap:10px}.sidebar-brand-icon{width:36px;height:36px;border-radius:8px;background:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;color:#fff;flex-shrink:0}.sidebar-brand-text{display:flex;flex-direction:column}.sidebar-brand-name{font-size:var(--text-lg);font-weight:600;line-height:1.2}.sidebar-brand-sub{font-size:var(--text-xs);color:var(--muted)}.sidebar-nav{flex:1;padding:8px 12px;display:flex;flex-direction:column;gap:2px}.sidebar-nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--radius-sm);color:var(--muted);text-decoration:none;font-size:var(--text-base);font-weight:500;cursor:pointer;border:none;background:none;width:100%;text-align:left;transition:background .15s,color .15s}.sidebar-nav-item:hover{background:var(--surface-2);color:var(--fg)}.sidebar-nav-item.active{background:var(--accent-soft);color:var(--accent)}.sidebar-nav-item svg{flex-shrink:0}.sidebar-footer{padding:16px 20px;border-top:1px solid var(--border);font-size:var(--text-xs);color:var(--muted-2)}.main-content{flex:1;padding:32px 40px;min-width:0}.page-header{margin-bottom:28px}.page-title{font-size:var(--text-2xl);font-weight:700;letter-spacing:-.02em}.page-subtitle{font-size:var(--text-base);color:var(--muted);margin-top:4px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-bottom:28px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;gap:8px}.stat-card-label{font-size:var(--text-sm);color:var(--muted);font-weight:500}.stat-card-value{font-size:var(--text-3xl);font-weight:700;letter-spacing:-.02em}.stat-card-icon{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;margin-bottom:4px}.table-wrapper{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.table-toolbar{display:flex;align-items:center;gap:12px;padding:16px 20px;border-bottom:1px solid var(--border);flex-wrap:wrap}.search-input{background:var(--surface-2);border:1px solid var(--border-light);border-radius:var(--radius-sm);padding:8px 12px 8px 36px;color:var(--fg);font-size:var(--text-base);font-family:var(--font-sans);width:280px;outline:none;transition:border-color .15s}.search-input:focus{border-color:var(--accent)}.search-input::placeholder{color:var(--muted-2)}.search-wrapper{position:relative}.search-wrapper svg{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--muted-2);pointer-events:none}.filter-select{background:var(--surface-2);border:1px solid var(--border-light);border-radius:var(--radius-sm);padding:8px 12px;color:var(--fg);font-size:var(--text-base);font-family:var(--font-sans);outline:none;cursor:pointer}.filter-select:focus{border-color:var(--accent)}table{width:100%;border-collapse:collapse}th{text-align:left;padding:12px 20px;font-size:var(--text-sm);font-weight:600;color:var(--muted);border-bottom:1px solid var(--border);white-space:nowrap;-webkit-user-select:none;user-select:none}th.sortable{cursor:pointer}th.sortable:hover{color:var(--fg)}th .sort-arrow{display:inline-block;margin-left:4px;opacity:.5}th.sorted .sort-arrow{opacity:1;color:var(--accent)}td{padding:14px 20px;font-size:var(--text-base);border-bottom:1px solid var(--border)}tr:last-child td{border-bottom:none}tbody tr{transition:background .1s}tbody tr:hover{background:var(--surface-2)}.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:20px;font-size:var(--text-xs);font-weight:600;text-transform:capitalize}.badge-dot{width:6px;height:6px;border-radius:50%}.badge-pending{background:#f59e0b1f;color:var(--status-pending)}.badge-pending .badge-dot{background:var(--status-pending)}.badge-confirmed{background:#3b82f61f;color:var(--status-confirmed)}.badge-confirmed .badge-dot{background:var(--status-confirmed)}.badge-cancelled{background:#ef44441f;color:var(--status-cancelled)}.badge-cancelled .badge-dot{background:var(--status-cancelled)}.badge-attended{background:#22c55e1f;color:var(--status-attended)}.badge-attended .badge-dot{background:var(--status-attended)}.btn{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:var(--radius-sm);font-size:var(--text-base);font-weight:500;font-family:var(--font-sans);cursor:pointer;border:none;transition:background .15s,opacity .15s;white-space:nowrap}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-ghost{background:transparent;color:var(--muted);padding:6px 10px}.btn-ghost:hover{background:var(--surface-3);color:var(--fg)}.btn-danger{background:transparent;color:var(--status-cancelled);padding:6px 10px}.btn-danger:hover{background:#ef44441a}.btn-secondary{background:var(--surface-3);color:var(--fg);border:1px solid var(--border-light)}.btn-secondary:hover{background:var(--surface-2)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:100;padding:20px}.modal{background:var(--surface);border:1px solid var(--border-light);border-radius:var(--radius);width:100%;max-width:520px;max-height:90vh;overflow-y:auto}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border)}.modal-title{font-size:var(--text-xl);font-weight:600}.modal-body{padding:24px;display:flex;flex-direction:column;gap:16px}.modal-footer{display:flex;justify-content:flex-end;gap:12px;padding:16px 24px;border-top:1px solid var(--border)}.form-group{display:flex;flex-direction:column;gap:6px}.form-label{font-size:var(--text-sm);font-weight:500;color:var(--muted)}.form-input,.form-select{background:var(--surface-2);border:1px solid var(--border-light);border-radius:var(--radius-sm);padding:10px 12px;color:var(--fg);font-size:var(--text-base);font-family:var(--font-sans);outline:none;transition:border-color .15s}.form-input:focus,.form-select:focus{border-color:var(--accent)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.chart-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.chart-title{font-size:var(--text-lg);font-weight:600;margin-bottom:20px}.bar-chart{display:flex;flex-direction:column;gap:16px}bar-chart-row{display:flex;flex-direction:column;gap:6px}.bar-chart-label{display:flex;align-items:center;gap:8px;font-size:var(--text-sm);color:var(--muted)}.bar-chart-bar{height:8px;border-radius:4px;background:var(--surface-3);overflow:hidden}.bar-chart-fill{height:100%;border-radius:4px;transition:width .3s ease}.bar-chart-value{font-size:var(--text-sm);font-weight:600;color:var(--fg)}.session-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;gap:16px}.session-header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.session-title{font-size:var(--text-lg);font-weight:600}.session-date{font-size:var(--text-sm);color:var(--muted)}.session-stats{display:flex;gap:16px;flex-wrap:wrap}.session-stat{display:flex;align-items:center;gap:6px;font-size:var(--text-sm)}.session-stat-dot{width:8px;height:8px;border-radius:50%}.session-count{font-size:var(--text-2xl);font-weight:700;margin-left:auto}.session-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:16px}.empty-state{padding:60px 20px;text-align:center;color:var(--muted)}.loading-state{padding:40px 20px;text-align:center;color:var(--muted)}.action-cell{display:flex;gap:4px;justify-content:flex-end}@media (max-width: 768px){.sidebar{display:none}.main-content{padding:20px}.form-row{grid-template-columns:1fr}.search-input{width:100%}}