.app{min-height:100vh;display:flex;flex-direction:column}.app-header{background:linear-gradient(135deg,#0891b2,#06b6d4);color:#fff;padding:1.5rem 2rem;box-shadow:0 2px 10px #0000001a}.header-content{max-width:1400px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.brand-section{display:flex;align-items:center;gap:1rem}.app-logo{height:50px;width:auto;object-fit:contain}.brand-text{display:flex;flex-direction:column;gap:.2rem}.app-header h1{font-size:1.8rem;font-weight:600;margin:0}.app-subtitle{font-size:.85rem;color:#ffffffe6;margin:0;font-weight:400}.business-selector{display:flex;gap:1rem;align-items:center}.business-select{padding:.6rem 1rem;font-size:1rem;border:2px solid white;border-radius:8px;background:#ffffffe6;color:#2c3e50;cursor:pointer;min-width:200px}.business-select:focus{outline:none;background:#fff}.app-nav{background:#fff;padding:1rem 2rem;box-shadow:0 2px 4px #0000000d;display:flex;justify-content:space-between;align-items:center;max-width:1400px;margin:0 auto;width:100%}.nav-link{text-decoration:none;color:#2c3e50;font-weight:500;padding:.5rem 1rem;border-radius:6px;transition:all .2s;position:relative}.nav-link:hover{background:#f5f7fa;color:#0891b2}.nav-link.active{background:#0891b2;color:#fff}.nav-link.active:hover{background:#0e7490;color:#fff}.app-main{flex:1;padding:2rem;max-width:1400px;margin:0 auto;width:100%}.no-business-message{text-align:center;padding:4rem 2rem}.no-business-message h2{color:#0891b2;margin-bottom:1rem}.btn{padding:.7rem 1.5rem;border:none;border-radius:8px;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s;text-decoration:none;display:inline-block}.btn-primary{background:#0891b2;color:#fff}.btn-primary:hover{background:#0e7490;transform:translateY(-1px);box-shadow:0 4px 12px #0891b266}.btn-secondary{background:#95a5a6;color:#fff}.btn-secondary:hover{background:#7f8c8d}.btn-danger{background:#e74c3c;color:#fff}.btn-danger:hover{background:#c0392b}.btn-success{background:#27ae60;color:#fff}.btn-success:hover{background:#229954}.btn-small{padding:.4rem .8rem;font-size:.9rem}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.page-header h2{font-size:2rem;color:#2c3e50}.dashboard{animation:fadeIn .3s}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem;margin-bottom:2rem}.stat-card{background:#fff;padding:2rem;border-radius:12px;box-shadow:0 2px 8px #0000001a;transition:transform .2s}.stat-card:hover{transform:translateY(-4px);box-shadow:0 4px 16px #00000026}.stat-card h3{color:#7f8c8d;font-size:.9rem;text-transform:uppercase;margin-bottom:.5rem;font-weight:600}.stat-value{font-size:2.5rem;font-weight:700;color:#0891b2;margin-bottom:.5rem}.stat-label{color:#2c3e50;font-size:1rem;margin-bottom:.5rem}.stat-detail{color:#7f8c8d;font-size:.9rem;margin-top:.3rem}.stat-detail.warning{color:#e74c3c;font-weight:600}.stat-card.highlight{border-left:4px solid #e74c3c}.report-section{background:#fff;padding:2rem;border-radius:12px;box-shadow:0 2px 8px #0000001a}.report-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.report-header h3{font-size:1.5rem;color:#2c3e50}.period-select{padding:.5rem 1rem;border:2px solid #e0e0e0;border-radius:6px;font-size:1rem;cursor:pointer}.report-details{display:flex;flex-direction:column;gap:1rem}.report-row{display:flex;justify-content:space-between;padding:.8rem;background:#f5f7fa;border-radius:6px;font-size:1.1rem}.report-row span:last-child{font-weight:600;color:#0891b2}.clients-page{animation:fadeIn .3s}.clients-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.client-card{background:#fff;padding:1.5rem;border-radius:12px;box-shadow:0 2px 8px #0000001a;transition:transform .2s}.client-card:hover{transform:translateY(-4px);box-shadow:0 4px 16px #00000026}.client-card h3{color:#2c3e50;margin-bottom:1rem;font-size:1.3rem}.client-card p{color:#7f8c8d;margin-bottom:.5rem}.card-actions{margin-top:1rem;display:flex;gap:.5rem}.invoices-page{animation:fadeIn .3s}.filter-bar{display:flex;gap:.5rem;margin-bottom:2rem}.filter-btn{padding:.6rem 1.2rem;border:2px solid #e0e0e0;background:#fff;border-radius:8px;cursor:pointer;font-size:.95rem;font-weight:500;transition:all .2s}.filter-btn:hover{border-color:#0891b2;color:#0891b2}.filter-btn.active{background:#0891b2;color:#fff;border-color:#0891b2}.invoices-table{background:#fff;border-radius:12px;box-shadow:0 2px 8px #0000001a;overflow:hidden}.invoices-table table{width:100%;border-collapse:collapse}.invoices-table th{background:#f5f7fa;padding:1rem;text-align:left;font-weight:600;color:#2c3e50;border-bottom:2px solid #e0e0e0}.invoices-table td{padding:1rem;border-bottom:1px solid #f0f0f0}.invoices-table tr:hover{background:#f8f9fa}.status-badge{padding:.3rem .8rem;border-radius:20px;font-size:.85rem;font-weight:500;color:#fff;text-transform:uppercase}.action-buttons{display:flex;gap:.5rem;flex-wrap:wrap}.empty-state{padding:3rem;text-align:center;color:#7f8c8d}.invoice-form-page{animation:fadeIn .3s}.invoice-form{background:#fff;padding:2rem;border-radius:12px;box-shadow:0 2px 8px #0000001a}.form-section{margin-bottom:2rem}.form-section h3{color:#2c3e50;margin-bottom:1.5rem;font-size:1.3rem;padding-bottom:.5rem;border-bottom:2px solid #f0f0f0}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.section-header h3{border:none;padding:0;margin:0}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin-bottom:1rem}.form-group{display:flex;flex-direction:column;margin-bottom:1rem}.form-group label{margin-bottom:.5rem;font-weight:500;color:#2c3e50}.form-group input,.form-group select,.form-group textarea{padding:.7rem;border:2px solid #e0e0e0;border-radius:6px;font-size:1rem;font-family:inherit;transition:border-color .2s}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:#0891b2}.line-items-table{width:100%;border-collapse:collapse;margin-bottom:1.5rem}.line-items-table th{background:#f5f7fa;padding:.8rem;text-align:left;font-weight:600;border-bottom:2px solid #e0e0e0}.line-items-table td{padding:.5rem;border-bottom:1px solid #f0f0f0}.line-items-table input{width:100%;padding:.5rem;border:2px solid #e0e0e0;border-radius:4px;font-size:.95rem}.line-items-table input:focus{outline:none;border-color:#0891b2}.amount-cell{font-weight:600;color:#0891b2}.invoice-totals{max-width:400px;margin-left:auto;background:#f5f7fa;padding:1.5rem;border-radius:8px}.total-row{display:flex;justify-content:space-between;padding:.5rem 0;font-size:1.1rem}.total-row.total{border-top:2px solid #0891b2;margin-top:.5rem;padding-top:1rem;font-weight:700;font-size:1.3rem;color:#0891b2}.form-actions{display:flex;gap:1rem;margin-top:2rem}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000;animation:fadeIn .2s}.modal{background:#fff;padding:2rem;border-radius:12px;box-shadow:0 10px 40px #0000004d;max-width:500px;width:90%;max-height:90vh;overflow-y:auto;animation:slideUp .3s}.modal h2{margin-bottom:1.5rem;color:#2c3e50}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@media (max-width: 768px){.header-content{flex-direction:column;gap:1rem}.app-nav{flex-direction:column;gap:.5rem}.stats-grid{grid-template-columns:1fr}.action-buttons{flex-direction:column}.invoices-table{overflow-x:auto}.form-row{grid-template-columns:1fr}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f5f7fa;color:#2c3e50}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}