*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #059669;--primary-light: #d1fae5;--primary-dark: #047857;--bg: #f3f4f6;--card: #ffffff;--sidebar: #1f2937;--sidebar-hover: #374151;--text: #111827;--text-light: #6b7280;--border: #e5e7eb;--danger: #ef4444;--radius: 10px;--shadow: 0 1px 3px rgba(0,0,0,.08)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);font-size:14px}.app{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--sidebar);color:#fff;padding:20px 0;display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;z-index:100}.sidebar-header{display:flex;align-items:center;gap:10px;padding:0 20px 20px;border-bottom:1px solid #374151}.sidebar-header .logo{font-size:24px}.sidebar-header .title{font-size:16px;font-weight:700}.company-switch{padding:12px 20px;border-bottom:1px solid #374151}.company-switch select{width:100%;background:#374151;color:#fff;border:none;padding:8px 10px;border-radius:6px;font-size:13px;cursor:pointer}.sidebar-nav{padding:12px 0;flex:1}.nav-item{display:block;width:100%;padding:10px 20px;border:none;background:none;color:#d1d5db;text-align:left;font-size:13px;cursor:pointer;transition:all .15s}.nav-item:hover{background:var(--sidebar-hover);color:#fff}.nav-item.active{background:var(--primary);color:#fff;font-weight:600}.main-content{flex:1;margin-left:240px;padding:24px 32px;max-width:calc(100vw - 240px)}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.page-header h1{font-size:22px;font-weight:700}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.stat-icon{font-size:28px;margin-bottom:8px;width:48px;height:48px;display:flex;align-items:center;justify-content:center;border-radius:12px}.stat-value{font-size:24px;font-weight:800}.stat-label{font-size:12px;color:var(--text-light);margin-top:4px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.card-title{font-size:15px;font-weight:700;margin-bottom:16px;color:var(--text)}.data-table{width:100%;border-collapse:collapse}.data-table th{text-align:left;padding:10px 8px;font-size:11px;font-weight:600;color:var(--text-light);text-transform:uppercase;letter-spacing:.5px;border-bottom:2px solid var(--border)}.data-table td{padding:10px 8px;font-size:13px;border-bottom:1px solid var(--border)}.data-table tr.clickable{cursor:pointer;transition:background .1s}.data-table tr.clickable:hover{background:#f9fafb}.num{font-weight:600;font-family:monospace}.amount{text-align:right;font-weight:600}.actions{text-align:right;white-space:nowrap}.text-danger{color:var(--danger);font-weight:600}.text-muted{font-size:11px;color:var(--text-light)}.status-badge{display:inline-block;padding:3px 10px;border-radius:12px;font-size:11px;font-weight:600}.status-draft{background:#fef3c7;color:#92400e}.status-sent{background:#dbeafe;color:#1e40af}.status-paid{background:#d1fae5;color:#065f46}.status-overdue{background:#fee2e2;color:#991b1b}.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 18px;border:none;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;transition:all .15s}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-secondary{background:#f3f4f6;color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:#e5e7eb}.btn-sm{padding:6px 12px;font-size:12px}.btn-icon{background:none;border:none;cursor:pointer;padding:4px 6px;border-radius:4px;font-size:14px;transition:background .1s}.btn-icon:hover{background:#f3f4f6}.btn-danger-icon:hover{background:#fee2e2}.form-group{margin-bottom:12px}.form-group label{display:block;font-size:12px;font-weight:600;color:var(--text-light);margin-bottom:4px}.form-group input,.form-group select,.form-group textarea{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:6px;font-size:13px;background:#fff;transition:border-color .15s}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.form-row{display:flex;gap:12px}.form-row>.form-group{flex:1}.filter-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;gap:16px;flex-wrap:wrap}.summary-badges{display:flex;gap:8px;flex-wrap:wrap}.summary-badge{background:var(--card);border:1px solid var(--border);padding:6px 14px;border-radius:20px;font-size:12px;font-weight:600}.paid-badge{border-color:var(--primary-light);color:var(--primary)}.filter-tabs{display:flex;gap:4px}.filter-tab{padding:6px 14px;border:1px solid var(--border);background:var(--card);border-radius:20px;font-size:12px;cursor:pointer;transition:all .15s}.filter-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}.filter-tab:hover:not(.active){border-color:var(--primary)}.editor-grid{display:grid;grid-template-columns:1fr 320px;gap:20px;align-items:start}.editor-form .section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.editor-form .section-header h3{font-size:14px}.line-card{background:#f9fafb;border:1px solid var(--border);border-radius:8px;margin-bottom:8px;overflow:hidden}.line-header{display:flex;align-items:center;justify-content:space-between;padding:6px 10px;background:var(--border)}.line-num{font-size:11px;font-weight:700;color:var(--text-light)}.line-remove{background:none;border:none;color:var(--danger);cursor:pointer;font-size:14px}.line-body{padding:10px}.line-product-select{margin-bottom:8px}.line-product-select select{width:100%;padding:6px 10px;border:1px solid var(--border);border-radius:6px;font-size:12px}.line-details{display:flex;gap:8px}.line-total{font-size:14px;font-weight:700;color:var(--primary);padding-top:6px}.editor-preview{position:sticky;top:24px}.preview-sticky{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.preview-totals h3{font-size:14px;margin-bottom:15px}.total-row{display:flex;justify-content:space-between;padding:6px 0;font-size:13px}.total-row.grand-total{border-top:2px solid var(--primary);padding-top:10px;margin-top:6px;font-size:16px}.total-row.grand-total .amount{color:var(--primary)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:#fff;border-radius:var(--radius);padding:24px;width:520px;max-width:90vw;max-height:80vh;overflow-y:auto;box-shadow:0 20px 60px #0003}.modal h3{font-size:16px;margin-bottom:16px}.loading,.page-loading{display:flex;align-items:center;justify-content:center;padding:60px}.empty-state{text-align:center;padding:40px 20px;color:var(--text-light)}.empty-state p{font-size:14px}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 768px){.sidebar{width:60px;overflow:hidden}.sidebar .title,.sidebar-nav .nav-item:not(.active){display:none}.sidebar-nav .nav-item{padding:12px;text-align:center}.sidebar-header{padding:12px}.main-content{margin-left:60px;padding:16px;max-width:calc(100vw - 60px)}.stats-grid{grid-template-columns:repeat(2,1fr)}.editor-grid{grid-template-columns:1fr}.line-details{flex-direction:column}.filter-bar{flex-direction:column;align-items:flex-start}}