:root{--bg-color: #ffffff;--text-color: #000000;--grey-color: #666666;--border-color: #000000;--error-color: #dc2626;--success-color: #16a34a}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.5}.container{max-width:900px;margin:0 auto;padding:16px}h1{font-size:24px;font-weight:600;text-transform:lowercase}h2{font-size:18px;font-weight:600;text-transform:lowercase}h3{font-size:14px;font-weight:600;text-transform:lowercase}a{color:var(--text-color)}.text-grey{color:var(--grey-color)}.text-error{color:var(--error-color)}.text-success{color:var(--success-color)}.text-small{font-size:12px}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.flex{display:flex}.flex-wrap{flex-wrap:wrap}.justify-between{justify-content:space-between}.items-center{align-items:center}.gap-1{gap:8px}.gap-2{gap:16px}.form-section{margin-bottom:16px}.form-section label{display:block;font-size:12px;text-transform:lowercase;margin-bottom:4px;color:var(--grey-color)}.form-row{display:flex;gap:16px}.form-row>*{flex:1}.card-item{border:1px solid var(--border-color);padding:16px;margin-bottom:8px}.card-item:hover{background-color:#fafafa}.status-badge{display:inline-block;padding:2px 8px;font-size:11px;text-transform:uppercase;border:1px solid}.status-badge.draft{color:var(--grey-color);border-color:var(--grey-color)}.status-badge.sent{color:#2563eb;border-color:#2563eb}.status-badge.paid{color:var(--success-color);border-color:var(--success-color);background:#dcfce7}.status-badge.overdue{color:var(--error-color);border-color:var(--error-color)}.status-badge.cancelled{color:var(--grey-color);border-color:var(--grey-color);background:#f3f4f6}table{width:100%;border-collapse:collapse}th{text-align:left;padding:8px;border-bottom:2px solid var(--border-color);font-size:12px;text-transform:lowercase;font-weight:600}td{padding:8px;border-bottom:1px solid #eee;font-size:14px}th:last-child,td:last-child{text-align:right}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-bottom:24px}.stat-card{border:1px solid var(--border-color);padding:16px}.stat-value{font-size:24px;font-weight:600}.stat-label{font-size:12px;color:var(--grey-color);text-transform:lowercase}.line-items-table{margin-bottom:16px}.line-items-table input{width:100%}.line-items-table .description-col{width:40%}.line-items-table .qty-col{width:15%}.line-items-table .price-col,.line-items-table .amount-col{width:20%}.line-items-table .remove-col{width:5%}.totals-section{margin-left:auto;width:250px}.totals-row{display:flex;justify-content:space-between;padding:8px 0;font-size:14px}.totals-row.total{border-top:2px solid var(--border-color);font-weight:600;font-size:18px;padding-top:12px}.help-text{font-size:12px;color:var(--grey-color)}.link-button{background:none;border:none;color:var(--text-color);text-decoration:underline;cursor:pointer;font-size:12px;padding:0}.link-button:hover{color:var(--grey-color)}.link-button.danger{color:var(--error-color)}.tabs{display:flex;gap:16px;border-bottom:1px solid var(--border-color);margin-bottom:16px}.tab{padding:8px 0;font-size:14px;color:var(--grey-color);text-decoration:none;border-bottom:2px solid transparent;margin-bottom:-1px}.tab.active{color:var(--text-color);border-bottom-color:var(--text-color)}.invoice-preview{border:1px solid var(--border-color);padding:40px;background:#fff}.invoice-preview .header{display:flex;justify-content:space-between;margin-bottom:40px}.invoice-preview .business-info h2{margin-bottom:8px}.invoice-preview .invoice-meta{text-align:right}.invoice-preview .invoice-meta h1{font-size:32px;font-weight:400}textarea{font-family:Inter,sans-serif;width:100%;padding:8px;border:1px solid var(--border-color);border-radius:0;font-size:14px;resize:vertical}textarea:focus{outline:none;border-color:var(--text-color)}select{font-family:Inter,sans-serif;padding:8px;border:1px solid var(--border-color);border-radius:0;font-size:14px;background:#fff}select:focus{outline:none;border-color:var(--text-color)}.actions-bar{display:flex;gap:8px;padding:16px 0;border-top:1px solid var(--border-color);margin-top:24px}