:root{--qb-green-primary:#2ca01c;--qb-green-dark:#1e7e15;--qb-green-light:#e8f5e6;--qb-green-muted:#4caf50;--nav-bg:#1a2332;--nav-bg-hover:#243044;--nav-text:#a3b1c2;--nav-text-active:#fff;--nav-accent:#2ca01c;--bg-primary:#f5f6f8;--bg-secondary:#fff;--bg-tertiary:#eef0f3;--text-primary:#1a1a1a;--text-secondary:#5a5a5a;--text-muted:#8a8a8a;--text-inverse:#fff;--border-light:#e0e4e8;--border-medium:#c5ccd3;--border-dark:#9aa5b1;--status-success:#2ca01c;--status-warning:#f5a623;--status-error:#d93025;--status-info:#1a73e8;--status-overdue:#d93025;--status-paid:#2ca01c;--status-partial:#f5a623;--status-open:#1a73e8;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow-md:0 2px 4px rgba(0,0,0,.08);--shadow-lg:0 4px 12px rgba(0,0,0,.12);--navbar-height:64px;--toolbar-height:52px;--font-family:"Segoe UI",-apple-system,BlinkMacSystemFont,"Roboto",sans-serif;--font-mono:"Consolas","Monaco",monospace}*{box-sizing:border-box;margin:0;padding:0}body,html{height:100%;font-family:var(--font-family);font-size:14px;line-height:1.5;color:var(--text-primary);background:var(--bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app-layout{display:flex;flex-direction:column;height:100vh;overflow:hidden}.top-navbar{height:var(--navbar-height);background:var(--nav-bg);border-bottom:1px solid hsla(0,0%,100%,.1);flex-shrink:0;z-index:100;box-shadow:0 2px 4px rgba(0,0,0,.1)}.navbar-content,.top-navbar{display:flex;align-items:center}.navbar-content{width:100%;justify-content:space-between;padding:0 16px;gap:16px}.navbar-left{gap:24px;flex:1 1;min-width:0}.navbar-left,.navbar-logo{display:flex;align-items:center}.navbar-logo{gap:10px;flex-shrink:0}.navbar-logo-icon{width:32px;height:32px;background:var(--qb-green-primary);border-radius:6px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:16px}.navbar-logo-text{color:var(--nav-text-active);font-weight:600;font-size:14px;white-space:nowrap}.navbar-nav-items{display:flex;align-items:center;gap:4px;overflow-x:auto;flex:1 1;min-width:0}.navbar-nav-items::-webkit-scrollbar{display:none}.navbar-nav-items{-ms-overflow-style:none;scrollbar-width:none}.navbar-item{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:8px 12px;color:var(--nav-text);text-decoration:none;font-size:11px;transition:all .15s ease;cursor:pointer;border-radius:4px;min-width:60px;position:relative;white-space:nowrap}.navbar-item.active,.navbar-item:hover{background:var(--nav-bg-hover);color:var(--nav-text-active)}.navbar-item.active:after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60%;height:3px;background:var(--nav-accent);border-radius:3px 3px 0 0}.navbar-item-icon{width:20px;height:20px;opacity:.85}.navbar-item.active .navbar-item-icon{opacity:1}.navbar-item-label{font-size:11px;font-weight:500;text-align:center;line-height:1.2}.navbar-right{gap:16px;flex-shrink:0}.navbar-right,.navbar-status{display:flex;align-items:center}.navbar-status{gap:8px;padding:6px 12px;border-radius:4px;background:hsla(0,0%,100%,.05)}.status-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}.status-dot.connected{background:var(--status-success);box-shadow:0 0 6px var(--status-success)}.status-dot.disconnected{background:var(--status-error);box-shadow:0 0 6px var(--status-error)}.status-dot.mock{background:var(--status-warning);box-shadow:0 0 6px var(--status-warning)}.status-text{color:var(--nav-text);font-size:12px;white-space:nowrap}.navbar-search-section{display:flex;align-items:center;gap:8px}.navbar-expand-icon{width:16px;height:16px;color:var(--nav-text);opacity:.7;cursor:pointer;transition:opacity .15s ease}.navbar-expand-icon:hover{opacity:1}.navbar-search-form{display:flex;align-items:center;gap:0;background:#fff;border-radius:4px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.1)}.navbar-search-input{padding:6px 12px;border:none;outline:none;font-size:13px;color:var(--text-primary);background:#fff;min-width:200px}.navbar-search-input::placeholder{color:var(--text-muted)}.navbar-search-button,.navbar-search-dropdown{display:flex;align-items:center;justify-content:center;padding:6px 8px;border:none;background:#fff;cursor:pointer;color:var(--text-secondary);transition:background .15s ease}.navbar-search-dropdown{border-left:1px solid var(--border-light);border-right:1px solid var(--border-light)}.navbar-search-button:hover,.navbar-search-dropdown:hover{background:var(--bg-tertiary)}.navbar-search-button svg,.navbar-search-dropdown svg{width:16px;height:16px}.main-content{flex:1 1;display:flex;flex-direction:column;overflow:hidden;margin-top:0}.toolbar{height:var(--toolbar-height);background:var(--bg-secondary);border-bottom:1px solid var(--border-light);justify-content:space-between;padding:0 24px;flex-shrink:0}.toolbar,.toolbar-left{display:flex;align-items:center}.toolbar-left{gap:16px}.toolbar-title{font-size:18px;font-weight:600;color:var(--text-primary)}.toolbar-breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-muted)}.toolbar-breadcrumb a{color:var(--text-secondary);text-decoration:none}.toolbar-breadcrumb a:hover{color:var(--qb-green-primary)}.toolbar-right{display:flex;align-items:center;gap:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:8px 16px;font-size:13px;font-weight:500;font-family:inherit;border:none;border-radius:4px;cursor:pointer;transition:all .15s ease;text-decoration:none}.btn:focus{outline:2px solid var(--qb-green-primary);outline-offset:2px}.btn-primary{background:var(--qb-green-primary);color:#fff}.btn-primary:hover{background:var(--qb-green-dark)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-medium)}.btn-secondary:hover{background:var(--border-light)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{background:var(--bg-tertiary);color:var(--text-primary)}.btn-sm{padding:6px 12px;font-size:12px}.btn-lg{padding:10px 20px;font-size:14px}.btn svg{width:16px;height:16px}.page-content{flex:1 1;overflow-y:auto;padding:24px}.card{background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:8px;box-shadow:var(--shadow-sm)}.card-header{padding:16px 20px;border-bottom:1px solid var(--border-light);display:flex;align-items:center;justify-content:space-between}.card-title{font-size:15px;font-weight:600;color:var(--text-primary)}.card-subtitle{font-size:12px;color:var(--text-muted);margin-top:2px}.card-body{padding:20px}.card-footer{padding:12px 20px;border-top:1px solid var(--border-light);background:var(--bg-primary);border-radius:0 0 8px 8px}.data-table{width:100%;border-collapse:collapse;font-size:13px}.data-table thead{background:var(--bg-tertiary);position:-webkit-sticky;position:sticky;top:0;z-index:10}.data-table th{padding:10px 12px;text-align:left;font-weight:600;color:var(--text-secondary);font-size:12px;text-transform:uppercase;letter-spacing:.3px;border-bottom:2px solid var(--border-medium);white-space:nowrap}.data-table td.text-right,.data-table th.text-right{text-align:right}.data-table td.text-center,.data-table th.text-center{text-align:center}.data-table tbody tr{border-bottom:1px solid var(--border-light);transition:background .1s ease}.data-table tbody tr:hover{cursor:pointer}.data-table tbody tr.selected,.data-table tbody tr:hover{background:var(--qb-green-light)}.data-table td{padding:10px 12px;vertical-align:middle}.data-table .cell-number{font-family:var(--font-mono);font-size:13px}.data-table .cell-negative{color:var(--status-error)}.status-badge{display:inline-flex;align-items:center;padding:3px 10px;font-size:11px;font-weight:600;border-radius:12px;text-transform:uppercase;letter-spacing:.3px}.status-badge.open{background:#e3f2fd;color:#1565c0}.status-badge.paid{background:#e8f5e9;color:#2e7d32}.status-badge.partial{background:#fff8e1;color:#f57f17}.status-badge.overdue{background:#ffebee;color:#c62828}.status-badge.draft{background:var(--bg-tertiary);color:var(--text-muted)}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:20px;gap:20px;margin-bottom:24px}.stat-widget{background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:8px;padding:20px;display:flex;align-items:flex-start;gap:16px}.stat-widget-icon{width:48px;height:48px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.stat-widget-icon svg{width:24px;height:24px}.stat-widget-icon.green{background:var(--qb-green-light);color:var(--qb-green-primary)}.stat-widget-icon.blue{background:#e3f2fd;color:#1565c0}.stat-widget-icon.orange{background:#fff8e1;color:#f57f17}.stat-widget-icon.red{background:#ffebee;color:#c62828}.stat-widget-content{flex:1 1;min-width:0}.stat-widget-label{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.3px;margin-bottom:4px}.stat-widget-value{font-size:24px;font-weight:700;color:var(--text-primary);line-height:1.2}.stat-widget-sub{font-size:13px;color:var(--text-secondary);margin-top:4px}.quick-actions{display:flex;gap:12px;flex-wrap:wrap}.quick-action-btn{display:flex;align-items:center;gap:10px;padding:12px 20px;background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:8px;font-size:14px;font-weight:500;color:var(--text-primary);text-decoration:none;cursor:pointer;transition:all .15s ease}.quick-action-btn:hover{background:var(--qb-green-light);border-color:var(--qb-green-primary);color:var(--qb-green-dark)}.quick-action-btn svg{width:20px;height:20px;color:var(--qb-green-primary)}.form-group{margin-bottom:16px}.form-label{display:block;font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.3px;margin-bottom:6px}.form-input,.form-select,.form-textarea{width:100%;padding:10px 12px;font-size:14px;font-family:inherit;border:1px solid var(--border-medium);border-radius:4px;background:var(--bg-secondary);color:var(--text-primary);transition:all .15s ease}.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--qb-green-primary);box-shadow:0 0 0 3px var(--qb-green-light)}.form-input::placeholder{color:var(--text-muted)}.form-input.error,.form-select.error{border-color:var(--status-error)}.form-error{font-size:12px;color:var(--status-error);margin-top:4px}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:16px;gap:16px}.line-items-table{width:100%;border-collapse:collapse;margin-top:16px}.line-items-table th{padding:8px 12px;text-align:left;font-size:11px;font-weight:600;text-transform:uppercase;color:var(--text-muted);background:var(--bg-tertiary);border-bottom:1px solid var(--border-medium)}.line-items-table td{padding:8px;vertical-align:top;border-bottom:1px solid var(--border-light)}.line-items-table .form-input,.line-items-table .form-select{padding:8px 10px;font-size:13px}.line-items-table .line-amount{font-family:var(--font-mono);font-weight:500;padding:10px 12px;text-align:right}.invoice-totals{display:flex;flex-direction:column;align-items:flex-end;margin-top:20px;padding-top:16px;border-top:2px solid var(--border-medium)}.totals-row{display:flex;justify-content:space-between;width:280px;padding:6px 0;font-size:14px}.totals-row.total{border-top:2px solid var(--text-primary);margin-top:8px;padding-top:12px;font-weight:700;font-size:16px}.totals-label{color:var(--text-secondary)}.totals-value{font-family:var(--font-mono);color:var(--text-primary)}.invoice-header{display:grid;grid-template-columns:1fr 1fr;grid-gap:32px;gap:32px;margin-bottom:24px}.invoice-header-section{display:flex;flex-direction:column;gap:12px}.invoice-meta{display:grid;grid-template-columns:120px 1fr;grid-gap:8px;gap:8px;font-size:14px}.invoice-meta dt{color:var(--text-muted);font-weight:500}.invoice-meta dd{color:var(--text-primary)}.address-block{font-size:14px;line-height:1.6;color:var(--text-secondary)}.address-block strong{color:var(--text-primary);font-weight:600}.search-input-wrapper{position:relative;width:300px}.search-input-wrapper svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--text-muted)}.search-input{width:100%;padding:8px 12px 8px 40px;font-size:13px;border:1px solid var(--border-medium);border-radius:6px;background:var(--bg-secondary);transition:all .15s ease}.search-input:focus{outline:none;border-color:var(--qb-green-primary);box-shadow:0 0 0 3px var(--qb-green-light)}.loading-spinner{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px;color:var(--text-muted)}.spinner{width:32px;height:32px;border:3px solid var(--border-light);border-top-color:var(--qb-green-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px;text-align:center}.empty-state svg{width:48px;height:48px;color:var(--text-muted);margin-bottom:16px}.empty-state h3{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.empty-state p{font-size:14px;color:var(--text-muted);max-width:320px}.error-banner{display:flex;align-items:center;gap:12px;padding:12px 16px;background:#ffebee;border:1px solid #ffcdd2;border-radius:6px;color:#c62828;margin-bottom:20px}.error-banner svg{width:20px;height:20px;flex-shrink:0}.error-banner p{flex:1 1;font-size:14px}.success-banner{gap:12px;padding:12px 16px;background:#e8f5e9;border:1px solid #c8e6c9;border-radius:6px;color:#2e7d32;margin-bottom:20px}.modal-overlay,.success-banner{display:flex;align-items:center}.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);justify-content:center;z-index:1000}.modal{background:var(--bg-secondary);border-radius:8px;box-shadow:var(--shadow-lg);max-width:500px;width:100%;max-height:90vh;overflow-y:auto}.modal-header{padding:16px 20px;border-bottom:1px solid var(--border-light);display:flex;align-items:center;justify-content:space-between}.modal-title{font-size:16px;font-weight:600}.modal-body{padding:20px}.modal-footer{padding:12px 20px;border-top:1px solid var(--border-light);display:flex;justify-content:flex-end;gap:12px}.dropdown-wrapper{position:relative}.dropdown-menu{position:absolute;top:100%;left:0;right:0;background:var(--bg-secondary);border:1px solid var(--border-medium);border-radius:4px;box-shadow:var(--shadow-lg);max-height:240px;overflow-y:auto;z-index:100}.dropdown-item{padding:10px 12px;cursor:pointer;font-size:14px;border-bottom:1px solid var(--border-light)}.dropdown-item:last-child{border-bottom:none}.dropdown-item.selected,.dropdown-item:hover{background:var(--qb-green-light)}.dropdown-item.selected{color:var(--qb-green-dark)}.text-right{text-align:right}.text-center{text-align:center}.text-muted{color:var(--text-muted)}.text-success{color:var(--status-success)}.text-error{color:var(--status-error)}.font-mono{font-family:var(--font-mono)}.font-bold{font-weight:700}.mt-4{margin-top:16px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}.gap-4{gap:16px}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-tertiary)}::-webkit-scrollbar-thumb{background:var(--border-medium);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-dark)}@media (max-width:1024px){.navbar-item-label{font-size:10px}.navbar-item{min-width:50px;padding:6px 8px}.navbar-search-input{min-width:150px}}@media (max-width:768px){.navbar-nav-items{gap:2px}.navbar-item{min-width:45px;padding:6px}.navbar-item-label{font-size:9px}.navbar-logo-text{display:none}.navbar-search-input{min-width:120px}.status-text{display:none}.invoice-header{grid-template-columns:1fr}.search-input-wrapper{width:100%}}