:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #eff6ff;--secondary: #64748b;--accent: #f59e0b;--text-main: #0f172a;--text-muted: #475569;--bg-main: #ffffff;--bg-alt: #f8fafc;--border: #e2e8f0;--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);--header-height: 72px;--radius: 12px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.6;color:var(--text-main);background-color:var(--bg-main);-webkit-font-smoothing:antialiased}.container{width:100%;max-width:1100px;margin:0 auto;padding:0 2rem}header{position:sticky;top:0;height:var(--header-height);background:#ffffffd9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);z-index:1000;display:flex;align-items:center;transition:all .3s ease}.header-inner{display:flex;justify-content:space-between;align-items:center;width:100%}.logo{font-weight:800;font-size:1.4rem;color:var(--text-main);text-decoration:none;letter-spacing:-.025em;display:flex;align-items:center;gap:.5rem}.logo span{color:var(--primary)}nav ul{display:flex;list-style:none;gap:2rem}nav a{text-decoration:none;font-weight:600;color:var(--text-muted);font-size:.9375rem;transition:all .2s ease}nav a:hover{color:var(--primary)}.section{padding:8rem 0;position:relative}.section-alt{background-color:var(--bg-alt)}.section-head{text-align:center;max-width:700px;margin:0 auto 4rem}.section-head h2{font-size:2.5rem;font-weight:800;letter-spacing:-.025em;margin-bottom:1.25rem;color:var(--text-main)}.section-head p{font-size:1.125rem;color:var(--text-muted);line-height:1.6}.grid-3{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:2rem}.card-premium{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:2.5rem;transition:all .4s cubic-bezier(.4,0,.2,1);text-decoration:none;color:inherit;display:flex;flex-direction:column;height:100%;box-shadow:0 4px 6px -1px #0000000d}.card-premium:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--primary)}.card-icon{width:56px;height:56px;background:var(--primary-light);color:var(--primary);border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:2rem}.card-premium h3{font-size:1.5rem;font-weight:700;margin-bottom:1rem;color:var(--text-main);letter-spacing:-.01em}.card-premium p{font-size:1rem;color:var(--text-muted);margin-bottom:2rem;flex-grow:1;line-height:1.6}.card-link{font-weight:700;font-size:.875rem;color:var(--primary);display:flex;align-items:center;gap:.5rem}.hero{padding:12rem 0 10rem;background:radial-gradient(circle at 100% 0%,#eff6ff 0%,transparent 40%),radial-gradient(circle at 0% 100%,#fef3c7 0%,transparent 40%),#fff;text-align:center;border-bottom:1px solid var(--border)}.hero h1{font-size:4.5rem;font-weight:900;letter-spacing:-.05em;line-height:1.05;margin-bottom:2rem;color:var(--text-main)}.hero p{font-size:1.35rem;color:var(--text-muted);max-width:650px;margin:0 auto 3.5rem;line-height:1.5}.search-container{max-width:600px;margin:0 auto;position:relative}.search-input-wrapper{position:relative;display:flex;align-items:center}.search-input-wrapper input{width:100%;padding:1.25rem 1.5rem 1.25rem 3.5rem;border-radius:16px;border:2px solid var(--border);font-size:1.125rem;box-shadow:var(--shadow-sm);transition:all .3s ease;background:#fff}.search-input-wrapper input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px #2563eb1a}.search-icon{position:absolute;left:1.25rem;color:var(--text-muted);width:20px;height:20px}#search-results{position:absolute;top:100%;left:0;right:0;background:#fff;border-radius:12px;margin-top:.5rem;box-shadow:var(--shadow-lg);border:1px solid var(--border);display:none;z-index:100;text-align:left;overflow:hidden}#search-results.show{display:block}.search-result-item{display:flex;flex-direction:column;padding:1rem 1.5rem;text-decoration:none;color:var(--text-main);border-bottom:1px solid var(--border);transition:background .2s}.search-result-item:last-child{border-bottom:none}.search-result-item:hover{background:var(--bg-alt)}.search-result-item span{font-weight:600}.search-result-item small{color:var(--text-muted);font-size:.75rem}.glossary-section{margin-bottom:4rem}.letter-heading{font-size:2rem;font-weight:800;color:var(--primary);border-bottom:2px solid var(--border);padding-bottom:.5rem;margin-bottom:1.5rem}.glossary-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem}.glossary-grid a{text-decoration:none;color:var(--text-main);padding:.75rem 1rem;border-radius:8px;background:var(--bg-alt);transition:all .2s;font-weight:500}.glossary-grid a:hover{background:var(--primary-light);color:var(--primary);transform:translate(4px)}.faq-grid{display:grid;gap:1.5rem;max-width:800px;margin:0 auto}.faq-item{background:#fff;border:1px solid var(--border);border-radius:12px;padding:1.5rem}.faq-item h3{font-size:1.125rem;font-weight:700;margin-bottom:.5rem;color:var(--text-main)}.faq-item p{color:var(--text-muted);font-size:.95rem}.features-list{display:grid;gap:1.5rem;margin-top:2.5rem}.feature-point{display:flex;gap:1rem;align-items:flex-start}.feature-check{background:#d1fae5;color:#059669;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:.75rem}.feature-content h4{font-size:1rem;font-weight:700;margin-bottom:.25rem}.feature-content p{font-size:.875rem;color:var(--text-muted)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeInUp .8s ease forwards}.badge{display:inline-block;padding:.5rem 1rem;background:var(--primary-light);color:var(--primary);border-radius:100px;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;margin-bottom:1.5rem}.breadcrumbs{padding:1rem 0;font-size:.875rem;color:var(--text-muted)}.breadcrumbs a{color:var(--primary);text-decoration:none}.breadcrumbs span{margin:0 .5rem}.toc{background:#f8fafc;border:1px solid #e2e8f0;border-radius:16px;padding:1.75rem 2rem;margin:3.5rem 0;max-width:600px}.toc-title{font-weight:800;font-size:.75rem;color:#1e293b;text-transform:uppercase;letter-spacing:.1em;margin-bottom:1.5rem;display:flex;align-items:center;gap:1rem}.toc-title:after{content:"";flex:1;height:1px;background:#e2e8f0}.toc ul{list-style:none!important;margin:0!important;padding:0!important;display:flex;flex-direction:column;gap:.75rem}.toc a{color:#1e293b;text-decoration:none;font-size:1rem;font-weight:500;transition:all .2s ease;display:block}.toc a:hover{color:var(--primary);text-decoration:none}.toc-sublist{margin-left:1.5rem!important;margin-top:.5rem!important;padding-left:0!important;border-left:none;display:flex;flex-direction:column;gap:.5rem!important}.toc-sublist a{font-size:.9375rem;color:var(--text-muted)}.prose table{width:100%;border-collapse:collapse;margin:3rem 0;background:#fff;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--border)}.prose th{background:var(--bg-alt);color:var(--text-main);text-align:left;padding:1.25rem 1.5rem;font-weight:800;font-size:.8125rem;text-transform:uppercase;letter-spacing:.1em;border-bottom:2px solid var(--border)}.prose td{padding:1.25rem 1.5rem;border-bottom:1px solid var(--border);color:var(--text-muted);font-size:.9375rem}.prose tr:last-child td{border-bottom:none}.prose tr:nth-child(2n){background-color:#fafafa}.prose tr:hover{background-color:var(--primary-light)}.faq-accordion{margin:4rem 0;display:grid;gap:1.25rem}.faq-item{border:1px solid var(--border);border-radius:16px;background:#fff;overflow:hidden;transition:all .3s ease}.faq-item:hover{border-color:var(--primary);box-shadow:var(--shadow-md)}.faq-question{width:100%;padding:1.5rem;background:none;border:none;text-align:left;font-weight:800;font-size:1rem;color:var(--text-main);cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .2s}.faq-question:hover{background:var(--bg-alt)}.faq-answer{color:var(--text-muted);font-size:.9375rem;line-height:1.7}.calculator-card{background:#fff;border:1px solid #edf2f7;border-radius:20px;padding:3.5rem;margin:4rem 0;box-shadow:0 4px 20px #00000008;position:relative;overflow:hidden}.calculator-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,#2563eb,#10b981)}.results-container{margin-top:3rem;padding-top:2rem;border-top:1px solid #f1f5f9;display:flex;flex-direction:column;gap:1rem}.result-row{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 2.5rem;border-radius:12px}.result-row.primary{background:#f8fafc}.result-row.success{background:#f0fdf4}.result-label{font-weight:700;color:#334155;font-size:1rem}.result-value{font-weight:800;font-size:2.25rem;letter-spacing:-.02em}.result-row.primary .result-value{color:#2563eb}.result-row.success .result-value{color:#10b981}.input-group label{display:block;font-weight:700;margin-bottom:.6rem;font-size:.95rem;color:var(--text-main)}.input-group input,.input-group select{width:100%;padding:1rem 1.25rem;border:2px solid var(--border);border-radius:12px;font-size:1rem;font-family:inherit;color:var(--text-main);background:#fff;transition:all .2s ease}.input-group input:focus,.input-group select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-light)}.btn-primary{display:inline-flex;align-items:center;justify-content:center;padding:1.125rem 2rem;background:var(--primary);color:#fff;border:none;border-radius:14px;font-weight:700;font-size:1.05rem;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 12px #2563eb33}.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 20px #2563eb4d}.btn-primary:active{transform:translateY(0)}.input-group small{display:block;margin-top:.4rem;color:var(--text-muted);font-size:.75rem}.result-box{background:var(--bg-alt);padding:1.5rem;border-radius:12px;text-align:center}.result-box .label{display:block;font-size:.75rem;font-weight:700;text-transform:uppercase;color:var(--text-muted);margin-bottom:.5rem}.result-box .value{font-size:1.75rem;font-weight:800}.value.primary{color:var(--primary)}.value.accent{color:var(--accent)}.calc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;margin:2rem 0}.calc-card{border:1px solid var(--border);border-radius:10px;padding:1.5rem;transition:transform .2s,box-shadow .2s;text-decoration:none;color:inherit;display:block}.calc-card:hover{transform:translateY(-4px);box-shadow:0 10px 15px -3px #0000001a;border-color:var(--primary)}.calc-card h3{color:var(--primary);margin-bottom:.5rem;font-size:1.125rem}.calc-card p{font-size:.875rem;color:var(--text-muted)}footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:4rem 0 2rem;margin-top:5rem}.footer-nav{display:flex;justify-content:center;gap:2rem;margin-bottom:2rem;flex-wrap:wrap}.footer-nav a{text-decoration:none;color:var(--text-muted);font-size:.875rem}.copyright{text-align:center;font-size:.875rem;color:var(--text-muted)}@media(max-width:768px){nav{display:none}.hero-h1{font-size:2rem!important}.calc-widget{padding:1rem}}@media(min-width:320px){.container{min-width:300px}}.prose h1{font-size:2.5rem;font-weight:800;margin-bottom:1.5rem;line-height:1.2}.prose h2{font-size:1.75rem;font-weight:700;margin:2rem 0 1rem}.prose p{margin-bottom:1.25rem}.prose ul,.prose ol{margin-left:1.5rem;margin-bottom:1.25rem}.prose li{margin-bottom:.5rem}.ad-placeholder{background:#f1f5f9;border:1px dashed #cbd5e1;height:250px;display:flex;align-items:center;justify-content:center;color:#94a3b8;margin:2rem 0;font-size:.75rem;text-transform:uppercase}