*{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}.home-title{font-size:2.5rem}.home-subtitle,.home-title{margin-bottom:1rem;text-align:center}.home-subtitle{color:#666;font-size:1.1rem}.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}.home-title{font-size:1.75rem}.home-subtitle{font-size:1rem}.featured-links{flex-direction:column}.promo-link{padding:.875rem 1.25rem}.promo-link,.promo-text{font-size:.9rem}}