:root{--primary-color:#3b82f6;--primary-hover:#2563eb;--bg-color:#f3f4f6;--panel-bg:#fff;--text-main:#1f2937;--text-muted:#6b7280;--border-color:#e5e7eb;--danger-color:#ef4444;--danger-hover:#dc2626}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);height:100vh;font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.5;overflow:hidden}.app-container{flex-direction:column;height:100vh;display:flex}.app-header{background:var(--panel-bg);z-index:10;justify-content:space-between;align-items:center;padding:1rem 2rem;display:flex;box-shadow:0 1px 3px #0000001a}.app-header h1{color:var(--text-main);font-size:1.25rem;font-weight:600}.app-main{flex:1;display:flex;overflow:hidden}.sidebar{background:var(--panel-bg);border-right:1px solid var(--border-color);width:400px;padding:1.5rem;overflow-y:auto}.preview-section{background:#cbd5e1;flex:1;justify-content:center;padding:2rem;display:flex;overflow:auto}.preview-wrapper{background:#fff;flex-shrink:0;width:210mm;min-height:297mm;padding:0;box-shadow:0 10px 25px #0000001a}.btn{cursor:pointer;border:none;border-radius:.375rem;align-items:center;gap:.5rem;padding:.5rem 1rem;font-size:.875rem;font-weight:500;transition:all .2s;display:inline-flex}.primary-btn{background-color:var(--primary-color);color:#fff}.primary-btn:hover{background-color:var(--primary-hover)}.icon-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;flex-shrink:0;padding:.25rem;transition:color .2s}.remove-btn:hover{color:var(--danger-hover)}.invoice-form h2,.invoice-form h3{color:var(--text-main);margin-bottom:1rem;font-size:1.125rem;font-weight:600}.invoice-form h3{margin-top:1.5rem}.form-group{margin-bottom:1rem}.form-group.row{gap:1rem;display:flex}.input-group{flex-direction:column;flex:1;gap:.25rem;display:flex}label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.75rem;font-weight:600}input{border:1px solid var(--border-color);border-radius:.375rem;width:100%;min-width:0;padding:.5rem;font-size:.875rem;transition:border-color .2s,box-shadow .2s}input:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px #3b82f61a}.items-list{flex-direction:column;gap:.75rem;margin-bottom:1rem;display:flex}.item-row{background:var(--bg-color);border:1px solid var(--border-color);border-radius:.5rem;align-items:flex-end;gap:.5rem;padding:.75rem;display:flex}.item-row .particulars{flex:2}.item-row .qty{flex:1;min-width:60px}.item-row .rate{flex:1;min-width:80px}.add-item-btn{border:1px dashed var(--border-color);color:var(--primary-color);background:#fff;justify-content:center;width:100%}.add-item-btn:hover{border-color:var(--primary-color);background:#3b82f60d}.invoice-preview-container.modern-theme{color:#333;box-sizing:border-box;background:#fff;width:100%;height:100%;padding:20mm 15mm;font-family:Inter,system-ui,-apple-system,sans-serif}.invoice-header{justify-content:space-between;align-items:flex-start;margin-bottom:20px;display:flex}.company-details{text-align:left}.company-name{color:#1e293b;letter-spacing:.5px;margin:0;font-size:28px;font-weight:800}.company-address,.company-email{color:#64748b;margin:4px 0;font-size:13px}.invoice-title{color:#1e293b;letter-spacing:1px;font-size:32px;font-weight:900}.divider-thick{border-top:4px solid #1e293b;margin:0 0 30px}.invoice-meta-grid{border:1px solid #e2e8f0;margin-bottom:30px;display:flex}.meta-box{border-right:1px solid #e2e8f0;flex-direction:column;display:flex}.meta-box:last-child{border-right:none}.meta-box:first-child,.meta-box:nth-child(2){width:150px}.meta-box.bill-to{flex:1}.meta-label{color:#64748b;background:#f1f5f9;border-bottom:1px solid #e2e8f0;padding:8px 12px;font-size:11px;font-weight:700}.meta-value{align-items:center;padding:12px;font-size:14px;font-weight:600;display:flex}.invoice-table{border-collapse:collapse;border:1px solid #e2e8f0;width:100%;margin-bottom:30px}.invoice-table th,.invoice-table td{border:1px solid #e2e8f0;padding:12px 10px;font-size:13px}.invoice-table th{color:#fff;text-transform:uppercase;text-align:center;background:#1e293b;font-size:12px;font-weight:700}.col-sr{text-align:center;width:60px}.col-particulars{text-align:left!important}.col-qty{text-align:center;width:80px}.col-rate{text-align:right;width:100px}.col-amount{text-align:right;width:120px}.item-row-data td{border-bottom:1px solid #e2e8f0}.item-row-data.empty td{color:#0000}.invoice-table tfoot td{background:#fff;border:1px solid #e2e8f0;padding:0}.footer-left{vertical-align:middle}.footer-flex{justify-content:space-between;align-items:stretch;height:100%;display:flex}.rupees-text{flex:1;align-items:center;padding:12px;display:flex}.rupees-label{white-space:pre-wrap;width:40px;margin-right:10px;font-weight:600}.total-label{border-left:1px solid #e2e8f0;align-items:center;padding:12px 20px;font-size:14px;font-weight:800;display:flex}.invoice-table tfoot td.total-amount{vertical-align:middle;text-align:right;padding:12px 10px;font-size:14px;font-weight:800}.invoice-footer{justify-content:space-between;align-items:flex-end;margin-top:80px;display:flex}.footer-message{color:#64748b;font-size:12px}.signature-area{text-align:center;width:200px}.company-sig{color:#64748b;text-align:right;margin-bottom:40px;font-size:12px}.sig-line{border-top:1px solid #cbd5e1;margin-top:40px;margin-bottom:5px}.sig-label{color:#64748b;font-size:11px}@media (width<=900px){.app-main{flex-direction:column;overflow-y:auto}.sidebar{border-right:none;border-bottom:1px solid var(--border-color);width:100%;overflow-y:visible}input{font-size:16px}.preview-section{justify-content:flex-start;padding:1rem;overflow:auto visible}}