:root{color:#0f172a;background:#f8fafc;font-family:Inter,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400}*{box-sizing:border-box}body{margin:0;min-height:100vh}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}#root{min-height:100vh}.app-shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.sidebar{background:#0f172a;color:#e2e8f0;padding:24px 16px;display:flex;flex-direction:column;gap:24px}.sidebar-brand{font-size:1.1rem;font-weight:700;color:#fff}.sidebar-nav{display:flex;flex-direction:column;gap:8px}.sidebar-link{padding:10px 12px;border-radius:8px;color:#cbd5e1}.sidebar-link.active,.sidebar-link:hover{background:#1e293b;color:#fff}.sidebar-footer{margin-top:auto;display:flex;flex-direction:column;gap:12px}.user-email{font-size:.85rem;color:#94a3b8;word-break:break-word}.content{padding:32px}.page-header{margin-bottom:24px}.page-header h1{margin:0 0 8px;font-size:1.75rem}.page-header p{margin:0;color:#64748b}.card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:20px;margin-bottom:20px}.card h2{margin:0 0 16px;font-size:1.1rem}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}label{display:flex;flex-direction:column;gap:6px;font-size:.9rem;color:#334155}input,select{border:1px solid #cbd5e1;border-radius:8px;padding:10px 12px;background:#fff}button.primary{background:#2563eb;color:#fff;border:none;border-radius:8px;padding:10px 16px}button.secondary{background:#e2e8f0;color:#0f172a;border:none;border-radius:8px;padding:10px 16px}button.danger{background:#dc2626;color:#fff;border:none;border-radius:8px;padding:10px 16px}button.icon-button{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;border:none;border-radius:8px;background:transparent}button.icon-button-danger{color:#dc2626}button.icon-button-danger:hover{background:#fef2f2}button.primary:disabled,button.secondary:disabled,button.danger:disabled,button.icon-button:disabled{opacity:.6;cursor:not-allowed}.actions{display:flex;gap:12px;margin-top:16px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:12px;border-bottom:1px solid #e2e8f0;vertical-align:top}th{font-size:.85rem;color:#64748b}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}.exhibitor-table .row-delete-head,.exhibitor-table .row-delete-cell,.events-table .row-delete-head,.events-table .row-delete-cell{width:48px;padding-left:8px;padding-right:8px;text-align:center}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a73;display:grid;place-items:center;padding:24px;z-index:1000}.modal{width:min(100%,440px);background:#fff;border-radius:12px;padding:24px;box-shadow:0 20px 40px #0f172a2e}.modal h2{margin:0 0 12px;font-size:1.15rem}.modal p{margin:0 0 16px;color:#475569}.checkbox-row{display:flex;align-items:center;gap:10px;margin-bottom:20px;color:#334155;cursor:pointer}.checkbox-row input{width:16px;height:16px;margin:0}.modal-actions{display:flex;justify-content:flex-end;gap:12px}.logo-preview{width:48px;height:48px;object-fit:contain;border-radius:8px;border:1px solid #e2e8f0;background:#fff}.login-page{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:min(100%,420px);background:#fff;border:1px solid #e2e8f0;border-radius:16px;padding:32px;text-align:center}.login-card h1{margin:0 0 8px}.login-card p{color:#64748b;margin:0 0 24px}.login-form{display:flex;flex-direction:column;gap:16px;text-align:left}.login-form button.primary{width:100%;margin-top:8px}.alert{padding:12px 14px;border-radius:8px;margin-bottom:16px}.alert.error{background:#fef2f2;color:#b91c1c;border:1px solid #fecaca}.alert.success{background:#ecfdf5;color:#047857;border:1px solid #a7f3d0}.placeholder-box{color:#64748b}@media(max-width:900px){.app-shell{grid-template-columns:1fr}.sidebar{padding-bottom:16px}}