:root{--primary:#4f46e5;--primary-hover:#4338ca;--secondary:#f3f4f6;--secondary-hover:#e5e7eb;--text:#111827;--text-light:#6b7280;--border:#e5e7eb;--bg-light:#f9fafb;--error:#ef4444;--success:#10b981;--info:#3b82f6;--warning:#f59e0b;--card-shadow:0 4px 6px rgba(0,0,0,0.05);--page-shadow:0 2px 4px rgba(0,0,0,0.1);--transition:all .3s cubic-bezier(0.25,0.8,0.25,1)}*{box-sizing:border-box;margin:0;padding:0}.containert{max-width:1200px;margin:100px auto;background:white;border-radius:16px;box-shadow:var(--page-shadow);overflow:hidden}.header-t{padding:32px;border-bottom:1px solid var(--border);text-align:center;background:white}.header-t h1{font-size:2rem;margin-bottom:12px;font-weight:700;line-height:1.6;color:var(--primary);font-family:"Noto Sans",sans-serif;text-align:center}.header-t p{color:var(--text-light);font-size:1rem;font-family:"Noto Sans",sans-serif;text-align:center;max-width:80%;margin-left:auto;margin-right:auto}.main-content{padding:32px}.invoice-form{background:white;border-radius:12px;border:1px solid var(--border);overflow:hidden}.form-section{padding:24px;border-bottom:1px solid var(--border)}.form-section:last-child{border-bottom:0}.form-section h3{font-size:1.1rem;margin-bottom:20px;color:var(--text);display:flex;align-items:center;gap:8px}.form-section h3 i{color:var(--primary)}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}.form-group{display:flex;flex-direction:column;gap:8px}.form-label{font-weight:500;color:var(--text);font-size:.85rem}.form-input{padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:.9rem;transition:var(--transition)}.form-input:focus{border-color:var(--primary);outline:0;box-shadow:0 0 0 3px rgba(79,70,229,0.1)}.items-header{display:grid;grid-template-columns:3fr 1fr 1fr 1fr 1fr .5fr;gap:12px;padding:12px 0;margin-bottom:12px;background:var(--bg-light);border-radius:8px;font-weight:600;color:var(--text);font-size:.85rem}.item-col{padding:0 4px}.item-name-col{grid-column:span 1}.item-qty-col{text-align:center}.item-price-col{text-align:center}.item-tax-col{text-align:center}.item-total-col{text-align:center}.item-action-col{text-align:center}.items-container{min-height:100px;max-height:400px;overflow-y:auto}.item-row{display:grid;grid-template-columns:3fr 1fr 1fr 1fr 1fr .5fr;gap:12px;align-items:center;padding:8px 0;border-bottom:1px solid var(--border)}.item-row:last-child{border-bottom:0}.item-input{width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:6px;font-size:.85rem;transition:var(--transition)}.item-input:focus{border-color:var(--primary);outline:0;box-shadow:0 0 0 3px rgba(79,70,229,0.1)}.item-total{font-weight:600;color:var(--primary);text-align:center;display:block}.remove-item{background:0;border:0;cursor:pointer;color:var(--error);padding:6px;border-radius:6px;transition:var(--transition)}.remove-item:hover{background:rgba(239,68,68,0.1);transform:scale(1.1)}.empty-items{text-align:center;padding:40px;color:var(--text-light);font-style:italic}.btn-add-item{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;margin-top:16px;background:var(--success);color:white;border:0;border-radius:8px;font-weight:600;cursor:pointer;transition:var(--transition)}.btn-add-item:hover{background:#059669;transform:translateY(-2px)}.summary-section{background:var(--bg-light)}.summary-row{display:flex;justify-content:flex-end;align-items:center;padding:8px 0;gap:20px}.summary-label{font-weight:500;color:var(--text);min-width:100px;text-align:right}.summary-value{font-weight:600;color:var(--text);min-width:100px;text-align:right}.total-row{margin-top:8px;padding-top:12px;border-top:2px solid var(--border)}.total-row .summary-label,.total-row .summary-value{font-size:1.1rem;font-weight:700;color:var(--primary)}.action-buttons{display:flex;justify-content:center;gap:16px;padding:24px;border-top:1px solid var(--border)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:10px;font-weight:600;cursor:pointer;transition:var(--transition);border:0;outline:0;font-size:.95rem;gap:8px}.btn-primary{background-color:var(--primary);color:white}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover);transform:translateY(-2px);box-shadow:0 4px 12px rgba(79,70,229,0.3)}.btn-secondary{background-color:var(--secondary);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background-color:var(--secondary-hover);transform:translateY(-2px)}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.loading{display:none;text-align:center;padding:40px;background:var(--bg-light);border-radius:12px;margin:20px 0}.loading i{font-size:48px;color:var(--primary);margin-bottom:16px}.loading p{color:var(--text-light);font-size:.9rem}.error-message{display:none;padding:16px;background-color:#fee2e2;color:var(--error);border-radius:8px;margin:20px 0;text-align:center;font-weight:500;border-left:4px solid var(--error)}.toast{position:fixed;bottom:20px;right:20px;padding:12px 24px;border-radius:8px;background:var(--primary);color:white;font-weight:500;box-shadow:0 4px 12px rgba(0,0,0,0.15);opacity:0;transform:translateY(100px);transition:var(--transition);z-index:1000}@media(max-width:480px){.toast{left:20px;right:20px;text-align:center}}.toast.show{opacity:1;transform:translateY(0)}.toast.error{background-color:var(--error)}.toast.success{background-color:var(--success)}.how-to-section-wrapper{max-width:1200px;margin:60px auto;padding:0 20px}.how-to-section-wrapper h2{font-family:'Space Grotesk',sans-serif;text-align:center;font-size:2rem;color:#333;line-height:1.6;margin-bottom:40px}.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.step-card{background-color:#fff;padding:30px;border-radius:12px;border:1px solid #e9ecef;text-align:left;box-shadow:0 5px 15px rgba(0,0,0,0.05);transition:transform .3s ease}.step-card:hover{transform:translateY(-5px)}.step-card .step-number{font-size:1.5rem;font-weight:700;color:#fff;background-color:#0d47a1;width:45px;height:45px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:20px}.step-card h3{font-family:'Space Grotesk',sans-serif;font-size:1.3rem;margin-bottom:10px;color:#222;line-height:1.6}.step-card p{color:#666;line-height:1.6;font-size:1rem;margin:0}@media(max-width:768px){.steps-grid{grid-template-columns:1fr}}.content-wrapper{max-width:1200px;margin:60px auto;padding:40px;background:var(--bg-light);border-radius:16px;border:1px solid var(--border)}.content-wrapper h2{font-size:1.8rem;color:var(--primary);margin-top:0;margin-bottom:20px;border-left:4px solid var(--primary);padding-left:15px}.content-wrapper h3{font-size:1.3rem;color:var(--text);margin-top:25px;margin-bottom:10px}.content-wrapper p{margin-bottom:20px;font-size:1rem;color:var(--text);line-height:1.6}.content-wrapper ul{list-style:none;padding:0;margin-bottom:25px}.content-wrapper ul li{position:relative;padding-left:28px;margin-bottom:12px;font-size:1rem;color:var(--text)}.content-wrapper ul li i{position:absolute;left:0;top:3px;color:var(--success);font-size:1rem}.content-wrapper a{color:var(--primary);text-decoration:none;font-weight:500}.content-wrapper a:hover{text-decoration:underline}@media(max-width:768px){.content-wrapper{margin:30px 20px;padding:24px}.content-wrapper h2{font-size:1.5rem}}@media(max-width:1024px){.containert{max-width:95%;margin:80px auto}}@media(max-width:768px){.containert{margin:60px auto;border-radius:12px}.header-t{padding:24px}.header-t h1{font-size:1.5rem}.header-t p{max-width:95%}.main-content{padding:24px}.form-section{padding:20px}.form-grid{grid-template-columns:1fr}.items-header{display:none}.item-row{grid-template-columns:1fr;gap:10px;padding:16px;border:1px solid var(--border);border-radius:8px;margin-bottom:12px}.item-col{display:flex;align-items:center;justify-content:space-between}.item-col::before{content:attr(data-label);font-weight:600;font-size:.8rem;color:var(--text-light)}.item-qty-col,.item-price-col,.item-tax-col,.item-total-col{text-align:left}.item-total{text-align:left}.action-buttons{flex-direction:column}.btn{width:100%;justify-content:center}.summary-row{justify-content:space-between}.summary-label{min-width:auto}}@media(max-width:480px){.header-t h1{font-size:1.25rem}.main-content{padding:16px}.form-section{padding:16px}}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@media(prefers-color-scheme:dark){:root{--primary:#6366f1;--secondary:#374151;--text:#f9fafb;--text-light:#9ca3af;--border:#4b5563;--bg-light:#1f2937}body{background-color:#111827}.containert{background:#1f2937}.header-t{background:#1f2937;border-bottom-color:#4b5563}.invoice-form{background:#1f2937}.form-input{background:#1f2937;color:#f9fafb;border-color:#4b5563}.item-input{background:#1f2937;color:#f9fafb;border-color:#4b5563}.step-card{background:#1f2937;border-color:#374151}.step-card h3{color:#f9fafb}.step-card p{color:#9ca3af}.content-wrapper{background:#1f2937;border-color:#374151;color:#e5e7eb}.content-wrapper h2{color:#818cf8}.content-wrapper p,.content-wrapper ul li{color:#9ca3af}.summary-section{background:#1f2937}}@media print{.action-buttons,.btn-add-item,.how-to-section-wrapper,.content-wrapper,.remove-item{display:none !important}.containert{margin:0;padding:0;max-width:100%;box-shadow:none}.invoice-form{border:0}}.btn:focus-visible,.form-input:focus-visible,.item-input:focus-visible{outline:2px solid var(--primary);outline-offset:2px}