@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--primary-50: #fef2f2;--primary-100: #fee2e2;--primary-200: #fecaca;--primary-300: #fca5a5;--primary-400: #f87171;--primary-500: #ef4444;--primary-600: #dc2626;--primary-700: #b91c1c;--primary-800: #991b1b;--primary-900: #7f1d1d;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-400: #9ca3af;--gray-500: #6b7280;--gray-600: #4b5563;--gray-700: #374151;--gray-800: #1f2937;--gray-900: #111827;--success-500: #10b981;--warning-500: #f59e0b;--error-500: #ef4444;--info-500: #3b82f6;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-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:#f5f7fa;color:var(--gray-900);line-height:1.6;min-height:100vh;scroll-behavior:smooth}.container{max-width:1280px;margin:0 auto;padding:0 20px}a{color:var(--primary-600);text-decoration:none;transition:color .2s}a:hover{color:var(--primary-700);text-decoration:underline}button{cursor:pointer;border:none;outline:none;font-family:inherit}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:12px;font-weight:600;transition:all .3s cubic-bezier(.4,0,.2,1);gap:8px;position:relative;overflow:hidden}.btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#fff3;transform:translate(-50%,-50%);transition:width .6s,height .6s}.btn:hover:before{width:300px;height:300px}.btn-primary{background:linear-gradient(135deg,var(--primary-600),var(--primary-700));color:#fff;box-shadow:0 4px 15px #ef44444d}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px #ef444466}.btn-primary:active{transform:translateY(0)}input,select,textarea{font-family:inherit;font-size:inherit;border:1px solid var(--gray-300);border-radius:6px;padding:8px 12px;outline:none;transition:all .2s}input:focus,select:focus,textarea:focus{border-color:var(--primary-500);box-shadow:0 0 0 3px #ef44441a}.page-container{max-width:1200px;margin:0 auto;padding:24px;animation:fadeInUp .5s ease}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.page-header{display:flex;align-items:center;gap:12px;margin-bottom:32px}.page-header h1{font-size:2rem;font-weight:700;color:var(--gray-900)}.page-icon{color:var(--primary-600)}.content-section{background:#fff;border-radius:16px;padding:32px;margin-bottom:24px;box-shadow:0 10px 40px #00000014;border:1px solid rgba(0,0,0,.05);transition:transform .3s,box-shadow .3s}.content-section:hover{transform:translateY(-2px);box-shadow:0 15px 50px #0000001f}.content-section h2{font-size:1.5rem;font-weight:600;color:var(--gray-900);margin-bottom:16px}.content-section h3{font-size:1.25rem;font-weight:600;color:var(--gray-800);margin:20px 0 12px}.content-section p{color:var(--gray-700);line-height:1.8;margin-bottom:16px}.content-section ul{margin:12px 0 16px 24px;color:var(--gray-700)}.content-section li{margin-bottom:8px}.calculator-card{background:#fff;border-radius:20px;padding:32px;box-shadow:0 20px 60px #0000001a;margin-bottom:32px;border:1px solid rgba(0,0,0,.05)}.info-section{background:var(--gray-50);border-radius:12px;padding:24px;margin-bottom:24px}.info-section h2{color:var(--gray-900);margin-bottom:16px}.info-section h3{color:var(--gray-800);margin:20px 0 12px}.alert-info{background:#dbeafe;color:#1e40af;border:1px solid #93c5fd}.alert-success{background:#d1fae5;color:#065f46;border:1px solid #6ee7b7}.data-table{width:100%;border-collapse:separate;border-spacing:0;margin:20px 0;border-radius:12px;overflow:hidden;box-shadow:0 4px 20px #00000014}.data-table th{background:linear-gradient(135deg,var(--gray-100),var(--gray-50));padding:14px;text-align:left;font-weight:600;color:var(--gray-900);border-bottom:2px solid var(--gray-200)}.data-table td{padding:14px;border-bottom:1px solid var(--gray-100);color:var(--gray-700);background:#fff}.data-table tr:hover td{background:var(--primary-50);transition:background .2s}.faq-list{background:#fff;border-radius:16px;padding:32px;box-shadow:0 10px 40px #00000014}.faq-item{padding:24px;margin-bottom:16px;border-radius:12px;background:var(--gray-50);transition:all .3s}.faq-item:hover{background:#fff;box-shadow:0 4px 20px #00000014;transform:translate(8px)}.faq-item:last-child{border-bottom:none}.faq-question{font-size:1.125rem;font-weight:600;color:var(--gray-900);margin-bottom:12px}.faq-answer{color:var(--gray-700);line-height:1.8}.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:32px;margin-bottom:32px}.blog-card{background:#fff;border-radius:16px;padding:28px;box-shadow:0 10px 30px #00000014;transition:all .3s cubic-bezier(.4,0,.2,1);border:1px solid rgba(0,0,0,.05);position:relative;overflow:hidden}.blog-card:before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--primary-500),var(--primary-600));transform:translate(-100%);transition:transform .3s}.blog-card:hover{transform:translateY(-8px);box-shadow:0 20px 50px #00000026}.blog-card:hover:before{transform:translate(0)}.blog-title{font-size:1.25rem;font-weight:600;color:var(--gray-900);margin-bottom:12px}.blog-meta{display:flex;gap:16px;margin-bottom:16px;font-size:.875rem;color:var(--gray-600)}.blog-meta span{display:flex;align-items:center;gap:4px}.blog-excerpt{color:var(--gray-700);line-height:1.6;margin-bottom:16px}.blog-content{color:var(--gray-600);font-size:.875rem;margin-bottom:16px}.topic-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin:20px 0}.topic-card{background:#fff;padding:20px;border-radius:8px;border:1px solid var(--gray-200)}.topic-card h3{font-size:1.125rem;color:var(--gray-900);margin-bottom:8px}.topic-card p{color:var(--gray-600);font-size:.875rem}.newsletter-section{background:var(--primary-50);border-radius:12px;padding:32px;text-align:center;margin:32px 0}.newsletter-form{display:flex;gap:12px;max-width:500px;margin:20px auto 0}.newsletter-form input{flex:1}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;margin:32px 0}.feature-card{background:#fff;padding:24px;border-radius:12px;text-align:center;box-shadow:var(--shadow-md)}.feature-icon{color:var(--primary-600);margin-bottom:16px}.feature-card h3{font-size:1.25rem;color:var(--gray-900);margin-bottom:12px}.stats-section{background:var(--primary-50);border-radius:12px;padding:32px;margin:32px 0}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px;margin-top:24px}.stat-card{text-align:center}.stat-number{font-size:2.5rem;font-weight:700;color:var(--primary-600)}.stat-label{font-size:.875rem;color:var(--gray-600);text-transform:uppercase;letter-spacing:.05em}.contact-grid{display:grid;grid-template-columns:2fr 1fr;gap:32px;margin:32px 0}.contact-form{display:flex;flex-direction:column;gap:20px}.form-textarea{resize:vertical;min-height:120px}.contact-card{background:var(--gray-50);padding:20px;border-radius:8px;margin-bottom:20px}.contact-card h3{color:var(--gray-900);margin-bottom:8px}.contact-link{color:var(--primary-600);font-weight:500}.faq-prompt{display:flex;gap:12px;padding:20px;background:var(--primary-50);border-radius:8px;border:1px solid var(--primary-200)}.step-card{display:flex;gap:20px;padding:20px;background:#fff;border-radius:8px;border:1px solid var(--gray-200);margin-bottom:16px}.step-number{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--primary-600);color:#fff;border-radius:50%;font-weight:700;flex-shrink:0}.step-content h3{margin-bottom:8px}.step-content code{display:block;background:var(--gray-100);padding:8px 12px;border-radius:4px;margin-top:8px;font-family:monospace}.code-block{background:var(--gray-100);border-left:4px solid var(--primary-600);padding:16px;margin:16px 0;border-radius:4px}.lead{font-size:1.125rem;color:var(--gray-700);line-height:1.8;margin-bottom:24px}.last-updated{font-size:.875rem;color:var(--gray-600);font-style:italic;margin-bottom:24px}.help-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin:20px 0}.help-item{padding:16px;background:var(--gray-50);border-radius:8px}.help-item h4{color:var(--gray-900);margin-bottom:8px}.help-item p{color:var(--gray-600);font-size:.875rem}.commitment-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin:20px 0}.commitment-card{padding:20px;background:#fff;border-radius:8px;border:1px solid var(--gray-200)}.safety-guidelines{background:#fef3c7;border:1px solid #fde68a;border-radius:8px;padding:20px;margin:20px 0}.safety-guidelines h3{color:#92400e;margin-bottom:12px}.benefits-list{list-style:none;margin:20px 0}.benefits-list li{padding:12px 0;border-bottom:1px solid var(--gray-200)}.benefits-list li:last-child{border-bottom:none}.reference-table{overflow-x:auto;margin:20px 0}.reference-table table{width:100%;min-width:500px}.btn-secondary{background:var(--gray-200);color:var(--gray-700)}.btn-secondary:hover{background:var(--gray-300)}@media (max-width: 768px){.contact-grid,.blog-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}}.wire-size-calculator{max-width:1200px;margin:0 auto;padding:24px}.calculator-header{display:flex;align-items:center;gap:12px;margin-bottom:32px}.calculator-icon{color:var(--primary-600)}.calculator-title{font-size:2rem;font-weight:700;color:var(--gray-900)}.calculator-form{background:#fff;border-radius:12px;padding:24px;box-shadow:var(--shadow-md);margin-bottom:32px}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-bottom:24px}.form-group{display:flex;flex-direction:column}.form-label{display:flex;align-items:center;gap:6px;font-weight:500;color:var(--gray-700);margin-bottom:8px;font-size:.875rem}.form-input,.form-select{padding:10px 12px;border:1px solid var(--gray-300);border-radius:8px;font-size:1rem;transition:all .2s}.form-input:focus,.form-select:focus{border-color:var(--primary-500);box-shadow:0 0 0 3px #ef44441a;outline:none}.form-input.error{border-color:var(--error-500)}.error-text{color:var(--error-500);font-size:.75rem;margin-top:4px}.radio-group{display:flex;gap:16px}.radio-group label{display:flex;align-items:center;gap:6px;font-size:.875rem;cursor:pointer}.calculate-btn{width:100%;padding:12px 24px;background:var(--primary-600);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;display:flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;transition:all .2s}.calculate-btn:hover{background:var(--primary-700);transform:translateY(-1px);box-shadow:var(--shadow-lg)}.results-section{background:#fff;border-radius:12px;padding:24px;box-shadow:var(--shadow-md)}.results-title{font-size:1.5rem;font-weight:600;color:var(--gray-900);margin-bottom:20px}.result-card{background:var(--gray-50);border-radius:8px;padding:16px;text-align:center}.result-card.primary{background:var(--primary-50);border:2px solid var(--primary-200);margin-bottom:20px}.result-card.primary .result-value{font-size:2rem;color:var(--primary-700)}.results-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-bottom:20px}.result-label{font-size:.875rem;color:var(--gray-600);margin-bottom:8px}.result-value{font-size:1.25rem;font-weight:600;color:var(--gray-900)}.result-value.warning{color:var(--warning-500)}.result-value.success{color:var(--success-500)}.alert{display:flex;align-items:flex-start;gap:12px;padding:16px;border-radius:8px;margin-bottom:20px}.alert-warning{background:#fef3c7;color:#92400e;border:1px solid #fde68a}.info-box{display:flex;gap:12px;padding:16px;background:var(--gray-50);border-radius:8px;font-size:.875rem;color:var(--gray-700)}.info-box ul{margin:8px 0 0 20px;padding:0}@media (max-width: 768px){.form-grid{grid-template-columns:1fr}.results-grid{grid-template-columns:repeat(2,1fr)}}.app{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(135deg,#f5f7fa,#c3cfe2)}.app-header{background:#fffffffa;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 2px 20px #00000014;position:sticky;top:0;z-index:100;border-bottom:1px solid rgba(0,0,0,.05)}.header-content{display:flex;justify-content:space-between;align-items:center;padding:1.25rem 0}.logo-link{text-decoration:none;transition:transform .2s}.logo-link:hover{transform:scale(1.05)}.logo-container{display:flex;align-items:center;gap:12px}.logo-icon{filter:drop-shadow(0 2px 4px rgba(0,0,0,.1))}.logo-text{display:flex;flex-direction:column;line-height:1}.logo-text-primary{font-size:1.25rem;font-weight:700;background:linear-gradient(135deg,#ef4444,#dc2626);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.logo-text-secondary{font-size:.875rem;font-weight:500;color:var(--gray-600);margin-top:2px}.nav{display:flex;gap:1rem}.nav-link{color:var(--gray-700);font-weight:500;text-decoration:none;padding:8px 16px;border-radius:8px;transition:all .2s;position:relative}.nav-link:hover{color:var(--primary-600);background:var(--primary-50);text-decoration:none}.nav-link:active{transform:scale(.98)}.app-main{flex:1;padding:2rem 0}.hero-section{text-align:center;padding:4rem 2rem;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:24px;margin-bottom:3rem;position:relative;overflow:hidden;box-shadow:0 20px 40px #00000026}.hero-section:before{content:"";position:absolute;top:-50%;right:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.1) 0%,transparent 70%);animation:float 20s ease-in-out infinite}@keyframes float{0%,to{transform:translate(0) rotate(0)}33%{transform:translate(30px,-30px) rotate(120deg)}66%{transform:translate(-20px,20px) rotate(240deg)}}.hero-title{font-size:3rem;font-weight:800;color:#fff;margin-bottom:1rem;position:relative;z-index:1;text-shadow:0 2px 4px rgba(0,0,0,.1)}.hero-subtitle{font-size:1.25rem;color:#ffffffe6;max-width:600px;margin:0 auto;position:relative;z-index:1}.app-footer{background:linear-gradient(135deg,#1f2937,#111827);color:var(--gray-300);padding:4rem 0 2rem;margin-top:auto;position:relative;overflow:hidden}.app-footer:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--primary-500),transparent)}.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:2rem}.footer-section h3{color:#fff;margin-bottom:1rem;font-size:1.5rem;font-weight:700}.footer-section h4{color:var(--primary-400);margin-bottom:1rem;font-size:1rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.footer-section ul{list-style:none;padding:0}.footer-section li{margin-bottom:.5rem}.footer-section a{color:var(--gray-400);text-decoration:none;transition:all .2s;display:inline-block;padding:2px 0}.footer-section a:hover{color:var(--primary-400);transform:translate(4px);text-decoration:none}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:1.5rem;margin-top:2rem;text-align:center;color:var(--gray-500);font-size:.875rem}@media (max-width: 768px){.header-content{flex-direction:column;gap:1rem}.nav{width:100%;justify-content:center}.hero-title{font-size:2rem}.footer-content{grid-template-columns:1fr}}