:root{--background-color: #F9FAFB;--ui-background-color: #FFFFFF;--border-color: #E5E7EB;--text-color-primary: #111827;--text-color-secondary: #6B7281;--accent-color-primary: #3B82F6;--accent-color-secondary: #60A5FA}*{box-sizing:border-box}html,body{margin:0;padding:0;width:100%;overflow-x:hidden;font-family:Inter,sans-serif;background-color:var(--background-color);color:var(--text-color-primary);scroll-behavior:smooth}#root,main{width:100%;height:100%}.intro-container{padding:140px 2rem 4rem;text-align:center;max-width:800px;margin:0 auto}.intro-container h1{font-size:clamp(2.5rem,5vw,4rem);font-weight:700;line-height:1.2;letter-spacing:-.5px;margin:0 0 1rem}.intro-container p{font-size:clamp(1rem,2vw,1.25rem);color:var(--text-color-secondary);line-height:1.6;max-width:600px;margin:0 auto}.main-header{position:fixed;top:0;left:0;width:100%;display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;z-index:100;background-color:var(--ui-background-color);border-bottom:1px solid var(--border-color);transition:background-color .3s ease}.logo{display:flex;align-items:center}.desktop-nav{display:flex;gap:2rem}.nav-item{display:flex;align-items:center;gap:.5rem;color:var(--text-color-secondary);text-decoration:none;font-size:1rem;font-weight:600;position:relative;padding:.5rem 0;transition:color .3s ease}.nav-item-icon{display:flex;align-items:center}.nav-item:hover,.dropdown-container:hover .nav-item{color:var(--accent-color-primary)}.dropdown-container{position:relative}.dropdown-menu{position:absolute;top:100%;left:50%;transform:translate(-50%) translateY(10px);background-color:var(--ui-background-color);border:1px solid var(--border-color);border-radius:8px;padding:.5rem;list-style:none;width:max-content;opacity:0;visibility:hidden;transition:opacity .3s ease,transform .3s ease,visibility .3s;z-index:110;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -2px #0000001a}.dropdown-menu.visible{opacity:1;visibility:visible;transform:translate(-50%) translateY(5px)}.dropdown-item{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;color:var(--text-color-secondary);text-decoration:none;border-radius:4px;transition:background-color .3s ease,color .3s ease;white-space:nowrap}.dropdown-item-icon{display:flex;align-items:center;color:var(--accent-color-primary);transition:color .3s ease}.dropdown-item:hover{background-color:#f9fafb;color:var(--text-color-primary)}.dropdown-item:hover .dropdown-item-icon{color:var(--accent-color-secondary)}.header-actions{display:flex;align-items:center;gap:1.5rem}.search-container{position:relative;display:flex;align-items:center}.search-input{border:1px solid var(--border-color);border-radius:20px;padding:.5rem 1rem .5rem 2.5rem;font-size:.9rem;background-color:var(--background-color);transition:all .3s ease;width:180px}.search-input:focus{outline:none;border-color:var(--accent-color-primary);box-shadow:0 0 0 3px #3b82f633;background-color:var(--ui-background-color);width:240px}.search-icon{position:absolute;left:.9rem;color:var(--text-color-secondary);display:flex;align-items:center;pointer-events:none}.mobile-menu-toggle{display:none;background:none;border:none;cursor:pointer;color:var(--text-color-primary);padding:.5rem}.mobile-menu-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#11182780;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;opacity:0;animation:fade-in .3s ease forwards}@keyframes fade-in{to{opacity:1}}.mobile-menu-content{position:absolute;top:0;right:0;width:85%;max-width:350px;height:100%;background-color:var(--ui-background-color);transform:translate(100%);animation:slide-in .3s ease forwards;padding:1rem;display:flex;flex-direction:column;box-shadow:-10px 0 20px -10px #0000001a}@keyframes slide-in{to{transform:translate(0)}}.mobile-menu-header{display:flex;justify-content:space-between;align-items:center;padding-bottom:1rem;border-bottom:1px solid var(--border-color)}.close-menu-btn{background:none;border:none;cursor:pointer;padding:.5rem;color:var(--text-color-secondary)}.close-menu-btn:hover{color:var(--text-color-primary)}.mobile-nav{margin-top:1.5rem;overflow-y:auto}.mobile-accordion-item{border-bottom:1px solid var(--border-color)}.mobile-accordion-item:last-child{border-bottom:none}.mobile-accordion-header{width:100%;display:flex;align-items:center;gap:.75rem;padding:1rem .5rem;background:none;border:none;font-size:1.1rem;font-weight:600;cursor:pointer;text-align:left;color:var(--text-color-primary)}.accordion-chevron{margin-left:auto;transition:transform .3s ease;color:var(--text-color-secondary)}.mobile-accordion-item.open .accordion-chevron{transform:rotate(180deg)}.mobile-accordion-content{list-style:none;padding-left:1rem;overflow:hidden;max-height:0;transition:max-height .4s ease-in-out}.mobile-accordion-item.open .mobile-accordion-content{max-height:500px}.mobile-dropdown-item{display:flex;align-items:center;gap:.75rem;padding:.75rem .5rem;color:var(--text-color-secondary);text-decoration:none;border-radius:4px;transition:background-color .3s ease,color .3s ease}.mobile-dropdown-item:hover{background-color:var(--background-color);color:var(--text-color-primary)}.posts-section{max-width:1200px;margin:0 auto;padding:0 2rem 4rem;position:relative;z-index:5}.posts-section h2{font-size:2.5rem;font-weight:700;color:var(--text-color-primary);margin-bottom:2.5rem;text-align:center}.posts-section h2:not(:first-of-type){margin-top:4rem}.posts-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:2rem}.post-card{background-color:var(--ui-background-color);border:1px solid var(--border-color);border-radius:12px;overflow:hidden;transition:border-color .3s ease,box-shadow .3s ease,transform .3s ease;cursor:pointer;display:flex;flex-direction:column;opacity:0;transform:translateY(20px);animation:card-fade-in .6s ease-out forwards;box-shadow:0 1px 2px #0000000d}@keyframes card-fade-in{to{opacity:1;transform:translateY(0)}}.post-card:hover{transform:translateY(-5px);border-color:var(--accent-color-secondary);box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -2px #0000001a}.post-card-image-placeholder{height:180px;background-color:#f3f4f6;border-bottom:1px solid var(--border-color)}.post-card-content{padding:1.5rem;display:flex;flex-direction:column;flex-grow:1}.post-card-category{font-size:.8rem;font-weight:600;color:var(--accent-color-primary);text-transform:uppercase;letter-spacing:1px;margin-bottom:.5rem}.post-card-title{font-size:1.25rem;font-weight:600;color:var(--text-color-primary);margin:0 0 .75rem;line-height:1.4}.post-card-description{font-size:.95rem;color:var(--text-color-secondary);line-height:1.6;margin:0;flex-grow:1}.blog-post{max-width:800px;margin:0 auto;padding:120px 2rem 4rem;animation:card-fade-in .6s ease-out forwards}.back-button{display:inline-flex;align-items:center;gap:.5rem;margin-bottom:2rem;background:none;border:none;color:var(--accent-color-primary);font-size:1rem;font-weight:600;cursor:pointer;transition:color .3s ease;padding:.5rem 0}.back-button:hover{color:var(--accent-color-secondary)}.blog-post-header{text-align:center;margin-bottom:2.5rem}.blog-post-header h1{font-size:clamp(2rem,5vw,3rem);font-weight:700;line-height:1.2;margin:.5rem 0 0}.blog-post-image{height:350px;margin-bottom:2.5rem;border-radius:12px}.blog-post-content{font-size:1.1rem;line-height:1.7;color:var(--text-color-primary)}.blog-post-content h2{font-size:1.8rem;margin-top:2.5rem;margin-bottom:1.5rem;padding-bottom:.5rem;border-bottom:1px solid var(--border-color)}.blog-post-content p,.blog-post-content ul{margin-bottom:1.5rem}.blog-post-content ul{padding-left:1.5rem}.blog-post-content li{margin-bottom:.75rem}.blog-post-content img{max-width:100%;height:auto;border-radius:8px;margin:1.5rem 0;border:1px solid var(--border-color)}.calculator-container{background-color:var(--ui-background-color);border:1px solid var(--border-color);border-radius:12px;padding:2rem;margin:2rem 0;box-shadow:0 4px 6px -1px #0000000d}.calculator-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}.calculator-column h3{font-size:1.25rem;margin-top:0;border-bottom:1px solid var(--border-color);padding-bottom:.75rem;margin-bottom:1.5rem}.calculator-input-group{margin-bottom:1rem}.calculator-input-group label{display:block;font-weight:600;font-size:.9rem;margin-bottom:.5rem;color:var(--text-color-secondary)}.calculator-input-group input{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:8px;font-size:1rem;background-color:var(--background-color)}.calculator-input-group input:focus{outline:none;border-color:var(--accent-color-primary);box-shadow:0 0 0 3px #3b82f633}.calculator-result{margin-top:2rem;padding:1.5rem;background-color:var(--background-color);border-radius:8px;text-align:center}.calculator-result h4{margin:0 0 .5rem;font-size:1.1rem;color:var(--text-color-secondary)}.calculator-result p{font-size:1.5rem;font-weight:700;color:var(--accent-color-primary);margin:0}@media (max-width: 992px){.desktop-nav{display:none}.mobile-menu-toggle{display:block}}@media (max-width: 768px){.main-header{padding:1rem 1.5rem}.intro-container{padding:120px 1.5rem 3rem}.posts-section{padding:0 1.5rem 3rem}.posts-grid{grid-template-columns:1fr}.posts-section h2{font-size:2rem}.calculator-grid{grid-template-columns:1fr}}@media (max-width: 480px){.search-input{width:40px;padding-left:.5rem;padding-right:.5rem;color:transparent;cursor:pointer}.search-input:focus{position:absolute;right:0;width:calc(100vw - 120px);max-width:200px;color:var(--text-color-primary);cursor:text;padding-left:2.5rem}.blog-post{padding:100px 1.5rem 3rem}.blog-post-image{height:250px}}