body{margin:0;min-height:100vh}*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #6366f1;--primary-hover: #4f46e5;--secondary: #8b5cf6;--success: #10b981;--danger: #ef4444;--warning: #f59e0b;--dark: #1e293b;--darker: #0f172a;--light: #f8fafc;--gray: #64748b;--border: #e2e8f0;--shadow: rgba(0, 0, 0, .1)}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:var(--light);color:var(--dark)}.app{min-height:100vh;display:flex;flex-direction:column}.header{background:#fff;border-bottom:1px solid var(--border);box-shadow:0 1px 3px var(--shadow);position:sticky;top:0;z-index:100}.header-content{max-width:1400px;margin:0 auto;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:.75rem;color:var(--primary)}.logo h1{font-size:1.5rem;font-weight:700}.nav{display:flex;gap:.5rem}.nav button{display:flex;align-items:center;gap:.5rem;padding:.625rem 1.25rem;border:none;background:transparent;color:var(--gray);font-size:.95rem;font-weight:500;border-radius:.5rem;cursor:pointer;transition:all .2s}.nav button:hover{background:var(--light);color:var(--dark)}.nav button.active{background:var(--primary);color:#fff}.main{flex:1;max-width:1400px;width:100%;margin:0 auto;padding:2rem}.view-container{animation:fadeIn .3s}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.view-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;flex-wrap:wrap;gap:1rem}.view-header h2{font-size:2rem;font-weight:700;color:var(--darker)}.toolbar{display:flex;gap:1rem;align-items:center;flex-wrap:wrap}.search-box{display:flex;align-items:center;gap:.5rem;background:#fff;border:1px solid var(--border);border-radius:.5rem;padding:.5rem 1rem;min-width:250px}.search-box svg{color:var(--gray)}.search-box input{border:none;outline:none;flex:1;font-size:.95rem}.filter-select{padding:.625rem 1rem;border:1px solid var(--border);border-radius:.5rem;background:#fff;color:var(--dark);font-size:.95rem;cursor:pointer;outline:none;transition:border-color .2s}.filter-select:hover{border-color:var(--primary)}.btn-primary{display:flex;align-items:center;gap:.5rem;padding:.625rem 1.25rem;background:var(--primary);color:#fff;border:none;border-radius:.5rem;font-size:.95rem;font-weight:500;cursor:pointer;transition:background .2s}.btn-primary:hover{background:var(--primary-hover)}.btn-secondary{display:flex;align-items:center;gap:.5rem;padding:.625rem 1.25rem;background:#fff;color:var(--dark);border:1px solid var(--border);border-radius:.5rem;font-size:.95rem;font-weight:500;cursor:pointer;transition:all .2s}.btn-secondary:hover{background:var(--light);border-color:var(--primary)}.btn-icon{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;background:transparent;color:var(--gray);border-radius:.375rem;cursor:pointer;transition:all .2s}.btn-icon:hover{background:var(--light);color:var(--dark)}.btn-icon.danger:hover{background:#fee;color:var(--danger)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:4rem 2rem;text-align:center;background:#fff;border-radius:1rem;border:2px dashed var(--border)}.empty-state svg{color:var(--gray);margin-bottom:1rem}.empty-state h3{font-size:1.5rem;color:var(--dark);margin-bottom:.5rem}.empty-state p{color:var(--gray);margin-bottom:1.5rem}.invoice-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:1.5rem}.invoice-card{background:#fff;border:1px solid var(--border);border-radius:.75rem;padding:1.5rem;transition:all .2s;cursor:pointer}.invoice-card:hover{box-shadow:0 4px 12px var(--shadow);border-color:var(--primary)}.invoice-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1rem}.invoice-card-header h3{font-size:1.25rem;color:var(--darker);margin-bottom:.25rem}.client-name{color:var(--gray);font-size:.9rem}.status-badge{padding:.25rem .75rem;border-radius:9999px;font-size:.8rem;font-weight:600;text-transform:uppercase}.status-badge.paid{background:#d1fae5;color:#065f46}.status-badge.unpaid{background:#fee2e2;color:#991b1b}.invoice-card-body{margin-bottom:1rem}.invoice-detail{display:flex;align-items:center;gap:.5rem;color:var(--gray);font-size:.9rem;margin-bottom:.75rem}.invoice-total{display:flex;align-items:center;gap:.5rem;font-size:1.75rem;font-weight:700;color:var(--primary)}.invoice-card-actions{display:flex;gap:.5rem;padding-top:1rem;border-top:1px solid var(--border)}.client-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.client-card{background:#fff;border:1px solid var(--border);border-radius:.75rem;padding:1.5rem;transition:all .2s}.client-card:hover{box-shadow:0 4px 12px var(--shadow);border-color:var(--primary)}.client-card h3{font-size:1.25rem;color:var(--darker);margin-bottom:1rem}.client-details{margin-bottom:1rem}.client-detail{display:flex;align-items:center;gap:.5rem;color:var(--gray);font-size:.9rem;margin-bottom:.5rem}.client-detail svg{flex-shrink:0}.client-card-actions{display:flex;gap:.5rem;padding-top:1rem;border-top:1px solid var(--border)}.settings-form{background:#fff;border:1px solid var(--border);border-radius:.75rem;padding:2rem;max-width:600px}.form-group{margin-bottom:1.5rem;flex:1;min-width:0}.form-group label{display:block;font-weight:600;color:var(--darker);margin-bottom:.5rem;font-size:.9rem}.form-group input,.form-group select,.form-group textarea{width:100%;padding:.625rem 1rem;border:1px solid var(--border);border-radius:.5rem;font-size:.95rem;outline:none;transition:border-color .2s;font-family:inherit}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--primary)}.form-row{display:flex;gap:1rem;flex-wrap:wrap}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem;animation:fadeIn .2s}.modal{background:#fff;border-radius:1rem;max-width:800px;width:100%;max-height:90vh;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 20px 25px -5px #0000001a;animation:slideUp .3s}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 2rem;border-bottom:1px solid var(--border)}.modal-header h2{font-size:1.5rem;font-weight:700;color:var(--darker)}.modal-body{padding:2rem;overflow-y:auto;flex:1}.modal-footer{display:flex;justify-content:flex-end;gap:1rem;padding:1.5rem 2rem;border-top:1px solid var(--border);background:var(--light)}.items-section{margin:2rem 0;padding:1.5rem;background:var(--light);border-radius:.75rem}.items-section h3{font-size:1.125rem;font-weight:600;color:var(--darker);margin-bottom:1rem}.item-row{display:grid;grid-template-columns:1fr 100px 120px 120px auto;gap:.75rem;margin-bottom:.75rem;align-items:center}.item-row input{padding:.625rem 1rem;border:1px solid var(--border);border-radius:.5rem;font-size:.95rem;outline:none;transition:border-color .2s}.item-row input:focus{border-color:var(--primary)}.qty-input,.rate-input{text-align:right}.item-total{font-weight:600;color:var(--dark);text-align:right;min-width:100px}.discount-input{display:flex;gap:.5rem}.discount-input input{flex:1}.discount-input select{width:70px}.invoice-summary{margin-top:2rem;padding:1.5rem;background:var(--light);border-radius:.75rem}.summary-row{display:flex;justify-content:space-between;padding:.5rem 0;font-size:1rem}.summary-row.total{font-size:1.25rem;font-weight:700;color:var(--primary);padding-top:1rem;margin-top:.5rem;border-top:2px solid var(--border)}@media(max-width:768px){.header-content{flex-direction:column;gap:1rem}.nav{width:100%;justify-content:center}.view-header{flex-direction:column;align-items:flex-start}.toolbar{width:100%;flex-direction:column}.search-box{width:100%}.invoice-grid,.client-grid{grid-template-columns:1fr}.item-row{grid-template-columns:1fr;gap:.5rem;padding:1rem;background:#fff;border-radius:.5rem}.item-total{text-align:left}.modal{max-width:100%;max-height:100vh;border-radius:0}}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin-bottom:2rem}.stat-card{background:#fff;border:1px solid var(--border);border-radius:.75rem;padding:1.5rem;display:flex;gap:1rem;transition:all .2s}.stat-card:hover{box-shadow:0 4px 12px var(--shadow);transform:translateY(-2px)}.stat-icon{width:48px;height:48px;border-radius:.75rem;display:flex;align-items:center;justify-content:center;flex-shrink:0}.stat-icon.revenue{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.stat-icon.success{background:linear-gradient(135deg,#10b981,#059669);color:#fff}.stat-icon.warning{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff}.stat-icon.info{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff}.stat-content{flex:1}.stat-label{font-size:.875rem;color:var(--gray);margin-bottom:.25rem}.stat-value{font-size:1.875rem;font-weight:700;color:var(--darker);margin-bottom:.25rem}.stat-detail{font-size:.8rem;color:var(--gray)}.dashboard-actions{display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:2rem}.recent-section{margin-top:2rem}.recent-section h3{font-size:1.25rem;font-weight:600;color:var(--darker);margin-bottom:1rem}.toast-container{position:fixed;top:5rem;right:1.5rem;z-index:9999;display:flex;flex-direction:column;gap:.75rem;pointer-events:none}.toast{display:flex;align-items:center;gap:.75rem;padding:1rem 1.25rem;background:#fff;border-radius:.5rem;box-shadow:0 10px 25px #00000026;border-left:4px solid;min-width:300px;animation:slideInRight .3s ease;pointer-events:auto}@keyframes slideInRight{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.toast-success{border-left-color:var(--success);color:var(--success)}.toast-error{border-left-color:var(--danger);color:var(--danger)}.toast-info{border-left-color:var(--primary);color:var(--primary)}.toast span{color:var(--dark);font-weight:500}.preview-modal{max-width:900px}.invoice-preview{background:#fff;border:1px solid var(--border);border-radius:.5rem;padding:3rem}.preview-header{display:flex;justify-content:space-between;margin-bottom:2rem;padding-bottom:1.5rem;border-bottom:2px solid var(--border)}.preview-header h2{font-size:1.5rem;color:var(--darker);margin-bottom:.5rem}.preview-header p{color:var(--gray);font-size:.9rem;margin-bottom:.25rem}.preview-invoice-info{text-align:right}.preview-invoice-info h1{font-size:2.5rem;color:var(--primary);margin-bottom:.5rem}.preview-client{margin-bottom:2rem}.preview-client h3{font-weight:600;margin-bottom:.5rem;color:var(--darker)}.preview-client p{color:var(--gray);margin-bottom:.25rem}.preview-table{width:100%;border-collapse:collapse;margin:2rem 0}.preview-table thead{background:var(--primary);color:#fff}.preview-table th,.preview-table td{padding:.75rem 1rem;text-align:left}.preview-table th:last-child,.preview-table td:last-child{text-align:right}.preview-table tbody tr{border-bottom:1px solid var(--border)}.preview-table tbody tr:last-child{border-bottom:none}.preview-totals{max-width:400px;margin-left:auto;padding:1rem;background:var(--light);border-radius:.5rem}.preview-totals div{display:flex;justify-content:space-between;padding:.5rem 0;font-size:.95rem}.preview-total{font-size:1.25rem!important;font-weight:700;color:var(--primary);padding-top:1rem!important;margin-top:.5rem;border-top:2px solid var(--border)}.preview-notes{margin-top:2rem;padding:1rem;background:var(--light);border-radius:.5rem}.preview-notes h4{font-weight:600;margin-bottom:.5rem;color:var(--darker)}.preview-notes p{color:var(--gray);line-height:1.6}.preview-payment{margin-top:2rem;padding:1rem;background:#f0f9ff;border:1px solid #bfdbfe;border-radius:.5rem}.preview-payment h4{font-weight:600;margin-bottom:.75rem;color:var(--primary)}.preview-payment p{color:var(--dark);font-size:.9rem;margin-bottom:.5rem;line-height:1.5}.preview-payment strong{color:var(--darker);margin-right:.5rem}.loading-overlay{position:fixed;inset:0;background:#00000080;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:10000}.loading-spinner{width:60px;height:60px;border:4px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-overlay p{color:#fff;margin-top:1rem;font-weight:500}.btn-secondary-sm{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:#fff;color:var(--dark);border:1px solid var(--border);border-radius:.5rem;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s}.btn-secondary-sm:hover{background:var(--light);border-color:var(--primary)}@media(max-width:768px){.header-content{flex-direction:column;gap:1rem}.nav{width:100%;justify-content:center;flex-wrap:wrap}.nav button{font-size:.85rem;padding:.5rem 1rem}.view-header{flex-direction:column;align-items:flex-start}.toolbar{width:100%;flex-direction:column}.search-box{width:100%}.invoice-grid,.client-grid,.stats-grid{grid-template-columns:1fr}.dashboard-actions{flex-direction:column}.dashboard-actions button,.dashboard-actions label{width:100%}.item-row{grid-template-columns:1fr;gap:.5rem;padding:1rem;background:#fff;border-radius:.5rem}.item-total{text-align:left}.modal{max-width:100%;max-height:100vh;border-radius:0}.invoice-preview{padding:1.5rem}.preview-header{flex-direction:column;gap:1rem}.preview-invoice-info{text-align:left}.preview-table{font-size:.875rem}.toast-container{right:1rem;left:1rem}.toast{min-width:auto}}@media(max-width:480px){.main{padding:1rem}.logo h1{font-size:1.25rem}.view-header h2{font-size:1.5rem}.modal-body{padding:1rem}.stat-value{font-size:1.5rem}.preview-invoice-info h1{font-size:2rem}}