@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');:root{--blue-50:#eff6ff;--blue-100:#dbeafe;--blue-500:#3b82f6;--blue-600:#2563eb;--blue-700:#1d4ed8;--blue-800:#1e40af;--green-50:#f0fdf4;--green-500:#22c55e;--green-600:#16a34a;--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;--white:#ffffff;--primary:var(--blue-600);--primary-hover:var(--blue-700);--text:var(--gray-800);--text-secondary:var(--gray-500);--text-muted:var(--gray-400);--bg:var(--white);--bg-alt:var(--gray-50);--border:var(--gray-200);--font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--shadow-xs:0 1px 2px 0 rgb(0 0 0 / 0.05);--shadow-sm:0 1px 3px 0 rgb(0 0 0 / 0.1),0 1px 2px -1px rgb(0 0 0 / 0.1);--shadow-md:0 4px 6px -1px rgb(0 0 0 / 0.1),0 2px 4px -2px rgb(0 0 0 / 0.1);--shadow-lg:0 10px 15px -3px rgb(0 0 0 / 0.1),0 4px 6px -4px rgb(0 0 0 / 0.1);--radius:8px;--radius-lg:12px;--radius-xl:16px;--max-w:1200px;--content-w:680px;--header-h:60px}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-size-adjust:100%;-webkit-text-size-adjust:100%}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:0.01ms !important;animation-iteration-count:1 !important;transition-duration:0.01ms !important}}body{font-family:var(--font);font-size:1rem;line-height:1.6;color:var(--text);background:var(--bg);overflow-x:hidden}img{max-width:100%;height:auto;display:block;content-visibility:auto}a{color:var(--primary);text-decoration:none;transition:color 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1rem;border-radius:var(--radius);font-size:0.875rem;font-weight:500;z-index:1000}.skip-link:focus{top:1rem;color:var(--white)}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}.logo{font-size:1.125rem;font-weight:700;color:var(--text)}.logo:hover{color:var(--text)}.logo strong{color:var(--primary)}.nav-links{display:none;align-items:center;gap:2rem;list-style:none}.nav-links a{color:var(--text-secondary);font-size:0.9375rem;font-weight:500;transition:color 0.15s}.nav-links a:hover{color:var(--text)}.nav-toggle{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:none;background:none;cursor:pointer;border-radius:var(--radius)}.nav-toggle:hover{background:var(--gray-100)}.hamburger{position:relative;width:18px;height:2px;background:var(--text);border-radius:2px}.hamburger::before,.hamburger::after{content:'';position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px}.hamburger::before{top:-5px}.hamburger::after{top:5px}.nav-links.active{display:flex;flex-direction:column;position:absolute;top:var(--header-h);left:0;right:0;background:var(--white);border-bottom:1px solid var(--border);padding:1rem 1.25rem;gap:0.75rem;box-shadow:var(--shadow-lg)}@media (min-width:768px){.nav-toggle{display:none}.nav-links{display:flex}}.hero{background:linear-gradient(135deg,var(--blue-600) 0%,var(--blue-800) 100%);color:var(--white);padding:3.5rem 0 4rem;text-align:center}.hero h1{color:var(--white);margin-bottom:1rem;max-width:700px;margin-left:auto;margin-right:auto}.hero-subtitle{font-size:1.0625rem;line-height:1.6;opacity:0.9;max-width:540px;margin:0 auto 2rem}.hero-buttons{display:flex;flex-direction:column;gap:0.75rem;justify-content:center;align-items:center;margin-bottom:2.5rem}@media (min-width:480px){.hero-buttons{flex-direction:row;gap:1rem}}@media (min-width:768px){.hero{padding:5rem 0 5.5rem}.hero-subtitle{font-size:1.125rem}}.hero-stats{display:flex;justify-content:center;gap:2.5rem;flex-wrap:wrap;padding-top:2rem;border-top:1px solid rgba(255,255,255,0.2)}.hero-stat{text-align:center}.hero-stat-value{display:block;font-size:2rem;font-weight:800;line-height:1}.hero-stat-label{display:block;font-size:0.75rem;text-transform:uppercase;letter-spacing:0.1em;opacity:0.8;margin-top:0.375rem}.btn{display:inline-flex;align-items:center;justify-content:center;padding:0.625rem 1.25rem;font-size:0.9375rem;font-weight:600;border-radius:var(--radius);text-decoration:none;transition:all 0.15s;cursor:pointer;border:none;white-space:nowrap}.btn-primary{background:var(--white);color:var(--blue-600)}.btn-primary:hover{background:var(--blue-50);color:var(--blue-700)}.btn-secondary{background:rgba(255,255,255,0.15);color:var(--white);border:1px solid rgba(255,255,255,0.25)}.btn-secondary:hover{background:rgba(255,255,255,0.25);color:var(--white)}.btn-outline{background:var(--white);color:var(--text);border:1px solid var(--border)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}.btn-dark{background:var(--gray-900);color:var(--white)}.btn-dark:hover{background:var(--gray-800);color:var(--white)}.section{padding:3rem 0}.section-gray{background:var(--bg-alt)}.section-header{text-align:center;max-width:500px;margin:0 auto 2.5rem}.section-header h2{margin-bottom:0.5rem}.section-header p{color:var(--text-secondary);margin:0}@media (min-width:768px){.section{padding:4.5rem 0}.section-header{margin-bottom:3rem}}.articles-grid{display:grid;grid-template-columns:1fr;gap:1rem}@media (min-width:640px){.articles-grid{grid-template-columns:repeat(2,1fr)}}@media (min-width:960px){.articles-grid{grid-template-columns:repeat(3,1fr)}}.article-card{background:var(--white);border:1px solid var(--border);border-radius:12px;padding:1.25rem;transition:all 0.25s ease;display:flex;flex-direction:column;box-shadow:0 2px 8px rgba(0,0,0,0.06)}.article-card:hover{border-color:#3b82f6;box-shadow:0 8px 30px rgba(59,130,246,0.15);transform:translateY(-4px)}.article-card .badge{display:inline-block;padding:0.25rem 0.5rem;font-size:0.625rem;font-weight:700;text-transform:uppercase;letter-spacing:0.05em;border-radius:4px;margin-bottom:0.75rem;width:fit-content}.article-card .badge.pillar{background:var(--blue-50);color:var(--blue-600)}.article-card .badge.hub{background:var(--green-50);color:var(--green-600)}.article-card h3{font-size:0.9375rem;margin:0 0 0.5rem;line-height:1.4}.article-card h3 a{color:var(--text)}.article-card h3 a:hover{color:var(--primary)}.article-card .excerpt{font-size:0.875rem;color:var(--text-secondary);margin:0;line-height:1.5}.article-card .meta{font-size:0.8125rem;color:var(--text-muted);margin-top:auto;padding-top:0.75rem}.categories-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}@media (min-width:768px){.categories-grid{grid-template-columns:repeat(4,1fr)}}.category-card{display:flex;flex-direction:column;align-items:center;text-align:center;background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem 1rem;transition:all 0.2s}.category-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}.category-card h3{font-size:1rem;color:var(--text);margin:0 0 0.375rem}.category-card p{font-size:0.8125rem;color:var(--text-secondary);margin-bottom:0.75rem;line-height:1.4}.category-card .count{display:inline-block;background:var(--blue-50);color:var(--blue-600);padding:0.25rem 0.625rem;border-radius:100px;font-size:0.75rem;font-weight:600}.author-section{padding:3rem 0;background:var(--bg-alt)}@media (min-width:768px){.author-section{padding:4rem 0}}.author-box{display:flex;flex-direction:column;align-items:center;text-align:center;gap:1.25rem;max-width:600px;margin:0 auto;background:var(--white);border:1px solid var(--border);border-radius:var(--radius-xl);padding:1.5rem}.author-box img{width:72px;height:72px;border-radius:50%;object-fit:cover}.author-box h2{font-size:1.125rem;margin:0 0 0.375rem}.author-box p{color:var(--text-secondary);font-size:0.9375rem;line-height:1.6;margin-bottom:1rem}@media (min-width:640px){.author-box{flex-direction:row;text-align:left;padding:2rem;gap:1.5rem}.author-box img{width:88px;height:88px;flex-shrink:0}}.site-footer{background:var(--gray-900);color:var(--gray-400);padding:2.5rem 0}.footer-inner{display:flex;flex-direction:column;align-items:center;text-align:center;gap:1rem}.site-footer p{margin:0;font-size:0.875rem}.footer-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:1.25rem}.footer-nav a{color:var(--gray-400);font-size:0.875rem}.footer-nav a:hover{color:var(--white)}.disclaimer{font-size:0.75rem;color:var(--gray-500)}@media (min-width:768px){.footer-inner{flex-direction:row;justify-content:space-between;text-align:left}}.breadcrumbs{background:var(--bg-alt);padding:0.75rem 0;border-bottom:1px solid var(--border)}.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:0.5rem;list-style:none;font-size:0.8125rem}.breadcrumbs li{display:flex;align-items:center;color:var(--text-muted)}.breadcrumbs li:not(:last-child)::after{content:"/";margin-left:0.5rem;color:var(--gray-300)}.breadcrumbs a{color:var(--text-secondary)}.breadcrumbs a:hover{color:var(--primary)}.breadcrumbs li:last-child{color:var(--text-secondary);max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.article-page{max-width:100%;padding:0}.article-page .article-content{max-width:100%}.article-content{font-size:1.0625rem;line-height:1.8;color:var(--gray-700)}.article-content>p:first-child{font-size:1.125rem;color:var(--text);line-height:1.7}.article-content h2{font-size:1.375rem;color:var(--text);margin:1.75rem 0 0.75rem;padding-top:1rem;border-top:1px solid var(--border)}.article-content h2:first-of-type{margin-top:1.25rem;padding-top:0;border-top:none}.article-content h3{font-size:1.125rem;color:var(--text);margin:1.25rem 0 0.5rem}.article-content p{margin-bottom:1rem}.article-content ul,.article-content ol{margin:1rem 0;padding-left:1.5rem}.article-content ul{list-style:disc}.article-content ol{list-style:decimal}.article-content li{margin-bottom:0.5rem;padding-left:0.25rem}.article-content li::marker{color:var(--primary)}.article-content a{color:var(--primary);text-decoration:underline;text-underline-offset:2px;text-decoration-color:var(--blue-200)}.article-content a:hover{text-decoration-color:var(--primary)}.article-content strong{color:var(--text);font-weight:600}.article-content table,.comparison-table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:0.9375rem;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.article-content th,.article-content td,.comparison-table th,.comparison-table td{padding:0.75rem 1rem;text-align:left;border-bottom:1px solid var(--border)}.article-content th,.comparison-table th{background:var(--bg-alt);font-weight:600;color:var(--text)}.article-content tbody tr:last-child td,.comparison-table tbody tr:last-child td{border-bottom:none}.related-articles,.related-section{background:var(--bg-alt);border-radius:var(--radius-lg);padding:1.25rem;margin-top:2rem}.related-articles h2,.related-section h2{font-size:1rem;margin:0 0 1rem;padding:0;border:none}.related-list{display:flex;flex-direction:column;gap:0.5rem;list-style:none;padding:0;margin:0}.related-list li{margin:0;padding:0}.related-list a,.related-list li a{display:block;padding:0.75rem 1rem;color:var(--text);text-decoration:none;background:var(--white);border:1px solid var(--border);border-radius:var(--radius);font-size:0.9375rem;transition:all 0.15s}.related-list a:hover,.related-list li a:hover{border-color:var(--primary);color:var(--primary)}.category-count{color:var(--text-secondary);font-size:0.9375rem;margin-bottom:1rem}.articles-list{display:flex;flex-direction:column;gap:0.75rem}.article-item{background:var(--white);border:1px solid var(--border);border-radius:12px;padding:1.25rem;transition:all 0.25s ease;box-shadow:0 2px 8px rgba(0,0,0,0.06)}.article-item:hover{border-color:#3b82f6;box-shadow:0 8px 30px rgba(59,130,246,0.15);transform:translateY(-4px)}.article-item h2{font-size:1rem;margin:0;line-height:1.4}.article-item h2 a{color:var(--text)}.article-item h2 a:hover{color:var(--primary)}.article-item .article-meta{font-size:0.8125rem;color:var(--text-muted);margin:0.375rem 0 0;padding:0;border:none}.calculator-hero{background:linear-gradient(135deg,var(--blue-600) 0%,var(--blue-800) 100%);color:var(--white);padding:2.5rem 0;text-align:center}.calculator-hero h1{color:var(--white);margin-bottom:0.5rem}.calculator-hero p{opacity:0.9;margin:0}.calculator-section{padding:2.5rem 0}.calculator-grid{display:grid;grid-template-columns:1fr;gap:1.25rem;max-width:800px;margin:0 auto}@media (min-width:768px){.calculator-grid{grid-template-columns:1fr 1fr}}.calculator-form,.calculator-results{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem}.form-group{margin-bottom:1rem}.form-group label{display:block;font-weight:600;color:var(--text);margin-bottom:0.375rem;font-size:0.875rem}.form-group input,.form-group select{width:100%;padding:0.625rem 0.75rem;font-size:0.9375rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--white);font-family:inherit;transition:border-color 0.15s}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--primary)}.form-group small{display:block;margin-top:0.25rem;font-size:0.75rem;color:var(--text-muted)}.result-card{padding:1rem;background:var(--bg-alt);border-radius:var(--radius);margin-bottom:0.75rem}.result-card:last-child{margin-bottom:0}.result-card.highlight{background:linear-gradient(135deg,var(--green-500),var(--green-600));color:var(--white)}.result-label{display:block;font-size:0.75rem;margin-bottom:0.125rem}.result-value{display:block;font-size:1.25rem;font-weight:700}.result-card.highlight .result-label{opacity:0.9}.author-hero{background:linear-gradient(135deg,var(--blue-600) 0%,var(--blue-800) 100%);color:var(--white);padding:2.5rem 0}.author-hero-content{display:flex;flex-direction:column;align-items:center;text-align:center;gap:1.25rem;max-width:540px;margin:0 auto}.author-hero img{width:88px;height:88px;border-radius:50%;object-fit:cover;border:3px solid var(--white)}.author-hero h1{color:var(--white);font-size:1.625rem;margin-bottom:0.375rem}.author-hero p{opacity:0.92;line-height:1.6;margin:0}.author-articles{padding:2.5rem 0}.author-articles .section-header{margin-bottom:2rem}.error-page{min-height:50vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:3rem 0}.error-content h1{font-size:4rem;color:var(--primary);line-height:1;margin-bottom:1rem}.error-content h2{font-size:1.25rem;margin-bottom:0.75rem}.error-content p{color:var(--text-secondary);margin-bottom:1.5rem}.error-actions{display:flex;gap:0.75rem;justify-content:center;margin-bottom:2.5rem}.contact-page{max-width:540px;margin:0 auto;padding:3rem 1.25rem;text-align:center}.contact-page h1{margin-bottom:0.75rem}.contact-page>p{color:var(--text-secondary);margin-bottom:2rem}.contact-email{display:inline-flex;align-items:center;gap:0.75rem;padding:1rem 1.25rem;background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg);font-weight:600;color:var(--text)}.contact-page{max-width:100%;margin:0 auto}.contact-page h1{margin-bottom:0.75rem}.contact-page .contact-intro{font-size:1.125rem;color:var(--text-secondary);margin-bottom:2rem}.contact-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;margin-bottom:2rem}.contact-card h2{margin-top:0;margin-bottom:0.75rem;font-size:1.25rem}.contact-card .email-link{font-size:1.25rem;font-weight:600;color:var(--primary);text-decoration:none}.contact-card .email-link:hover{text-decoration:underline}.contact-card .response-time{color:var(--text-muted);margin-top:0.5rem;margin-bottom:0;font-size:0.9375rem}.contact-page h2{font-size:1.25rem;margin-top:2rem;margin-bottom:1rem}.contact-page ul{margin:0 0 1.5rem 0;padding-left:1.25rem}.contact-page li{margin-bottom:0.5rem}.contact-note{background:#fef3c7;border:1px solid #fcd34d;border-radius:var(--radius-lg);padding:1.5rem;margin-top:2rem}.contact-note h3{margin-top:0;margin-bottom:0.5rem;color:#92400e;font-size:1rem}.contact-note p{margin-bottom:0;color:#78350f}.back-link{display:inline-block;margin-top:2rem;color:var(--primary)}.legal-page{max-width:100%}.legal-page h1{margin-bottom:1.5rem}.legal-page h2{font-size:1.25rem;margin:2.5rem 0 1rem;padding-top:1.5rem;border-top:1px solid var(--border)}.legal-page h2:first-of-type{border-top:none;padding-top:0}.legal-page h3{font-size:1rem;margin:1.5rem 0 0.75rem;color:var(--gray-700)}.legal-page p,.legal-page ul,.legal-page ol{margin-bottom:1rem}.legal-page ul,.legal-page ol{padding-left:1.25rem}.legal-page ul{list-style:disc}.legal-page ol{list-style:decimal}.legal-page li{margin-bottom:0.5rem}.info-box{display:flex;gap:16px;padding:20px 24px;border-radius:12px;margin:24px 0;border-left:4px solid}.info-box-blue{background:#eff6ff;border-color:#3b82f6}.info-box-green{background:#ecfdf5;border-color:#10b981}.info-box-yellow{background:#fffbeb;border-color:#f59e0b}.info-box-red{background:#fef2f2;border-color:#ef4444}.info-box-icon{font-size:24px;flex-shrink:0;line-height:1}.info-box-content h4{margin:0 0 8px 0;font-size:16px;font-weight:600;color:var(--gray-800)}.info-box-content p{margin:0;color:var(--gray-600);font-size:0.9375rem}.info-box-content p:last-child{margin-bottom:0}.text-center{text-align:center}.text-muted{color:var(--text-muted)}@media print{.site-header,.site-footer,.related-articles,.related-section,.breadcrumbs{display:none}body{background:white;color:black}.article-page{padding:0;max-width:100%}}.tip-box{background:linear-gradient(135deg,#fef3c7 0%,#fef9c3 100%);border:1px solid #fcd34d;border-radius:12px;padding:20px;margin:32px 0}.tip-header{display:flex;align-items:center;gap:8px;margin-bottom:12px;font-weight:600;color:#92400e}.tip-icon{font-size:20px}.tip-box p{margin:0;color:#78350f}.warning-box{background:#fef2f2;border:1px solid #fecaca;border-left:4px solid #ef4444;border-radius:12px;padding:20px;margin:32px 0}.warning-box .warning-header{display:flex;align-items:center;gap:8px;margin-bottom:12px;font-weight:600;color:#991b1b}.warning-box p{margin:0;color:#7f1d1d}.success-box{background:#ecfdf5;border:1px solid #a7f3d0;border-left:4px solid #10b981;border-radius:12px;padding:20px;margin:32px 0}.success-box .success-header{display:flex;align-items:center;gap:8px;margin-bottom:12px;font-weight:600;color:#065f46}.success-box p{margin:0;color:#047857}.quote-box{background:#f8fafc;border-left:4px solid #3b82f6;padding:24px;margin:32px 0;border-radius:0 12px 12px 0;font-size:18px;font-style:italic;color:#475569}.article-content ul.check-list,ul.check-list{list-style:none;padding-left:0}.article-content 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