*{box-sizing:border-box;padding:0;margin:0}body,html{max-width:100vw;overflow-x:hidden;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-color:#f5f5f5;color:#333}a{color:inherit;text-decoration:none}.container{max-width:1200px;margin:0 auto;padding:2rem 1rem}.calculator-card{background:#fff;border-radius:12px;padding:2rem;box-shadow:0 2px 8px rgba(0,0,0,.1);margin-bottom:2rem}.calculator-title{font-size:2rem;font-weight:700;color:#1a1a1a}.calculator-title,.form-group{margin-bottom:1.5rem}.form-label{display:block;font-weight:600;margin-bottom:.5rem;color:#555;font-size:.95rem}.form-input{width:100%;padding:.75rem;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;transition:border-color .2s}.form-input:focus{outline:none;border-color:#4a90e2}.btn{background:#4a90e2;color:#fff;padding:.75rem 2rem;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s}.btn:hover{background:#357abd}.btn:active{transform:scale(.98)}.result{margin-top:2rem;padding:1.5rem;background:#f0f7ff;border-radius:8px;border-left:4px solid #4a90e2}.result-title{font-weight:600;margin-bottom:.5rem;color:#1a1a1a}.result-value{font-size:1.5rem;font-weight:700;color:#4a90e2}.nav{background:#fff;box-shadow:0 2px 4px rgba(0,0,0,.1);padding:1rem 0;margin-bottom:2rem}.nav-container{max-width:1200px;margin:0 auto;padding:0 1rem;display:flex;justify-content:space-between;align-items:center}.nav-logo{font-size:1.5rem;font-weight:700;color:#4a90e2}.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:1.5rem;gap:1.5rem;margin-top:2rem}.category-card{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 2px 8px rgba(0,0,0,.1);transition:transform .2s,box-shadow .2s}.category-card:hover{transform:translateY(-4px);box-shadow:0 4px 12px rgba(0,0,0,.15)}.category-title{font-size:1.25rem;font-weight:700;margin-bottom:1rem;color:#1a1a1a}.calculator-link{display:block;padding:.75rem;margin-bottom:.5rem;border-radius:6px;transition:background .2s;color:#555}.calculator-link:hover{background:#f0f7ff;color:#4a90e2}.hero-section{text-align:center;padding:3rem 1rem;margin-bottom:4rem}.home-title{font-size:3rem;margin-bottom:1rem;text-align:center;color:#1a1a1a;font-weight:800;line-height:1.2}.home-subtitle{text-align:center;color:#666;margin-bottom:2rem;font-size:1.25rem;max-width:700px;margin-left:auto;margin-right:auto}.hero-stats{display:flex;justify-content:center;gap:3rem;margin-top:2rem;flex-wrap:wrap}.stat-item{text-align:center}.stat-number{font-size:2.5rem;font-weight:700;color:#4a90e2;line-height:1;margin-bottom:.5rem}.stat-label{font-size:.9rem;color:#666;text-transform:uppercase;letter-spacing:.5px}.categories-section{margin-bottom:4rem}.section-title{font-size:2rem;font-weight:700;margin-bottom:.5rem;color:#1a1a1a;text-align:center}.section-description{text-align:center;color:#666;margin-bottom:2.5rem;font-size:1.1rem}.categories-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));grid-gap:1.5rem;gap:1.5rem;margin-top:2rem}.category-card-large{background:#fff;border-radius:16px;padding:2rem;box-shadow:0 2px 12px rgba(0,0,0,.08);transition:all .3s ease;text-decoration:none;color:inherit;display:flex;align-items:flex-start;gap:1.5rem;position:relative;border:2px solid transparent}.category-card-large:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12);border-color:#4a90e2}.category-icon{font-size:3rem;flex-shrink:0;line-height:1}.category-content{flex:1 1;min-width:0}.category-name{font-size:1.5rem;font-weight:700;margin-bottom:.5rem;color:#1a1a1a}.category-count{font-size:.9rem;color:#666;margin-bottom:1rem}.category-preview{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.75rem}.preview-item{color:#555;background:#f5f5f5;border-radius:6px;display:inline-block}.preview-item,.preview-more{font-size:.85rem;padding:.35rem .75rem}.preview-more{color:#4a90e2;font-weight:600}.category-arrow{font-size:1.5rem;color:#4a90e2;opacity:0;transition:opacity .3s ease,transform .3s ease;flex-shrink:0}.category-card-large:hover .category-arrow{opacity:1;transform:translateX(4px)}.quick-access-section{margin-bottom:4rem}.quick-access-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));grid-gap:1rem;gap:1rem;margin-top:2rem}.quick-link{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 2px 8px rgba(0,0,0,.08);transition:all .2s ease;text-decoration:none;color:inherit;display:flex;flex-direction:column;align-items:center;gap:.75rem;border:2px solid transparent}.quick-link:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.12);border-color:#4a90e2}.quick-icon{font-size:2rem;line-height:1}.quick-text{font-size:.95rem;font-weight:600;color:#1a1a1a;text-align:center}.cta-section{text-align:center;padding:3rem 1rem;margin-top:2rem}.cta-button{display:inline-block;background:linear-gradient(135deg,#4a90e2,#357abd);color:#fff;padding:1rem 2.5rem;border-radius:12px;font-size:1.1rem;font-weight:600;text-decoration:none;transition:all .3s ease;box-shadow:0 4px 12px rgba(74,144,226,.3)}.cta-button:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(74,144,226,.4);background:linear-gradient(135deg,#357abd,#4a90e2)}.featured-section{text-align:center;margin-bottom:3rem;padding:1.5rem;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:12px;color:#fff}.featured-title{margin-bottom:1rem;font-size:1.3rem}.featured-description{margin-bottom:1rem;opacity:.95}.featured-links{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.featured-link{background:hsla(0,0%,100%,.2);padding:.75rem 1.5rem;border-radius:8px;color:#fff;text-decoration:none;font-weight:500;border:1px solid hsla(0,0%,100%,.3);transition:all .3s ease}.featured-link:hover{background:hsla(0,0%,100%,.3);transform:translateY(-2px)}.promo-banner{margin:2rem 0;text-align:center}.promo-link{display:inline-flex;align-items:center;gap:.75rem;padding:1rem 1.5rem;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;text-decoration:none;border-radius:8px;font-weight:500;transition:all .3s ease;box-shadow:0 2px 8px rgba(102,126,234,.3)}.promo-link:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(102,126,234,.4);background:linear-gradient(135deg,#764ba2,#667eea)}.promo-icon{font-size:1.2rem}.promo-text{font-size:1rem}.promo-arrow{font-size:1.2rem;transition:transform .3s ease}.promo-link:hover .promo-arrow{transform:translateX(4px)}@media (max-width:768px){.container{padding:1rem}.calculator-card{padding:1.5rem}.calculator-title{font-size:1.5rem}.category-grid{grid-template-columns:1fr}.nav-container{flex-wrap:wrap;gap:1rem}.hero-section{padding:2rem 1rem;margin-bottom:3rem}.home-title{font-size:2rem}.home-subtitle{font-size:1rem}.hero-stats{gap:2rem}.stat-number{font-size:2rem}.section-title{font-size:1.5rem}.section-description{font-size:1rem}.categories-grid{grid-template-columns:1fr;gap:1rem}.category-card-large{padding:1.5rem;flex-direction:column;align-items:center;text-align:center}.category-icon{font-size:2.5rem}.category-name{font-size:1.25rem}.category-arrow{display:none}.quick-access-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.75rem}.quick-link{padding:1.25rem 1rem}.quick-icon{font-size:1.5rem}.quick-text{font-size:.85rem}.cta-section{padding:2rem 1rem}.cta-button{padding:.875rem 2rem;font-size:1rem}.promo-link{padding:.875rem 1.25rem}.promo-link,.promo-text{font-size:.9rem}}article a{color:#4a90e2;text-decoration:none;transition:color .2s}article a:hover{color:#357abd;text-decoration:underline}article table{box-shadow:0 2px 8px rgba(0,0,0,.1)}article table tr:hover{background:#f9f9f9}