:root{--primary-color:#1a73e8;--secondary-color:#5f6368;--accent-color:#fbbc04;--text-primary:#202124;--text-secondary:#5f6368;--text-light:#80868b;--background-light:#f8f9fa;--background-white:#fff;--shadow-sm:0 2px 4px rgba(0,0,0,.1);--shadow-md:0 4px 8px rgba(0,0,0,.12);--shadow-lg:0 8px 16px rgba(0,0,0,.14);--border-radius:8px;--transition-speed:.2s ease-in-out;--footer-color:#ef4444}:root .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}body{font-family:'Roboto','Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background:var(--background-light);color:var(--text-primary);line-height:1.7;margin:0;padding:0;display:flex;flex-direction:column;min-height:100vh}.container{max-width:1200px;margin:20px auto;padding:0 15px;width:100%;flex-grow:1}.hero-section{background:linear-gradient(135deg,var(--primary-color) 0%,#4285f4 100%);color:#fff;text-align:center;padding:50px 20px;border-radius:var(--border-radius);margin-bottom:30px;box-shadow:var(--shadow-md)}.hero-section h1{font-size:2.75rem;font-weight:700;margin-bottom:1.25rem;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.hero-section p{font-size:1.25rem;max-width:800px;margin:0 auto;line-height:1.8;opacity:.9}.intro-section{text-align:center;margin-bottom:35px;padding:25px;background:var(--background-white);border-radius:var(--border-radius);box-shadow:var(--shadow-sm)}.intro-section h2{font-size:2rem;color:var(--text-primary);border-bottom:3px solid var(--primary-color);padding-bottom:.75rem;margin-bottom:1.5rem;display:inline-block}.intro-section p{font-size:1.1rem;color:var(--text-secondary);margin-bottom:1.25rem;max-width:900px;margin-left:auto;margin-right:auto}.tools-grid{display:grid;grid-gap:20px;margin-bottom:40px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.tool-card{background:var(--background-white);border:1px solid #e0e0e0;border-radius:var(--border-radius);box-shadow:var(--shadow-md);padding:25px;text-align:center;transition:transform var(--transition-speed),box-shadow var(--transition-speed);height:100%;display:flex;flex-direction:column;justify-content:space-between}.tool-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}.tool-card i{display:block;font-size:3.5rem;margin-bottom:1.25rem;color:var(--primary-color)}.tool-card h3{font-size:1.5rem;margin-bottom:1rem;color:var(--text-primary);font-weight:600}.tool-card p{font-size:1rem;margin-bottom:1.5rem;color:var(--text-secondary);flex-grow:1}.btn-custom{background:var(--primary-color);color:#fff;padding:1rem 2rem;border:none;border-radius:30px;font-size:1.1rem;font-weight:500;cursor:pointer;transition:background var(--transition-speed),transform var(--transition-speed);text-decoration:none;display:inline-block}.btn-custom:hover{background:#0d47a1;transform:translateY(-2px)}.info-section{display:flex;flex-wrap:wrap;gap:20px;margin-top:30px;margin-bottom:30px}.info-box{flex:1;min-width:280px;padding:30px;border-radius:var(--border-radius);color:#fff;text-align:center;box-shadow:var(--shadow-md)}.info-box h3{font-size:1.5rem;margin-bottom:1rem;display:flex;align-items:center;justify-content:center;gap:.75rem}.info-box p{font-size:1.1rem}.info-primary{background:var(--primary-color)}.info-success{background:#0f9d58}.ad-section{text-align:center;margin:30px 0;padding:15px;background:var(--background-white);border-radius:var(--border-radius);box-shadow:var(--shadow-sm)}.extra-info{background:var(--background-white);border:1px solid #e0e0e0;border-radius:var(--border-radius);box-shadow:var(--shadow-md);padding:35px;margin:30px 0;font-size:1.1rem;line-height:1.8}.extra-info h2{font-size:2.25rem;margin-bottom:1.5rem;color:var(--text-primary);border-bottom:3px solid var(--accent-color);padding-bottom:.75rem;display:inline-block}.extra-info p{margin-bottom:1.5rem;color:var(--text-secondary)}.extra-info p:last-child{margin-bottom:0}.featured-calculators{margin:40px 0;text-align:center}.featured-calculators h2{font-size:2rem;color:var(--text-primary);margin-bottom:1.5rem;position:relative;display:inline-block}.featured-calculators h2:after{content:'';position:absolute;width:70%;height:3px;background-color:var(--accent-color);bottom:-10px;left:15%}.calculator-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:30px 0}.calculator-tag{background:#e8f0fe;color:var(--primary-color);padding:8px 16px;border-radius:20px;font-size:.95rem;font-weight:500;transition:all var(--transition-speed)}.calculator-tag:hover{background:var(--primary-color);color:#fff;transform:scale(1.05)}.calculator-categories{margin:40px 0}.category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));grid-gap:20px}.category-card{background:var(--background-white);padding:20px;border-radius:var(--border-radius);box-shadow:var(--shadow-sm);transition:all var(--transition-speed)}.category-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}.category-card h3{color:var(--primary-color);margin-bottom:15px;font-size:1.3rem}.category-card ul{list-style-type:none;padding-left:0}.category-card ul li{margin-bottom:8px}.category-card ul li a{color:var(--text-secondary);text-decoration:none;transition:color var(--transition-speed)}.category-card ul li a:hover{color:var(--primary-color);text-decoration:underline}.article-section{margin:40px 0}.article-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));grid-gap:25px}.article-card{border-radius:var(--border-radius);overflow:hidden;box-shadow:var(--shadow-sm);background:var(--background-white);transition:transform var(--transition-speed)}.article-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}.article-content{padding:20px}.article-content h3{font-size:1.3rem;margin-bottom:10px}.article-content p{color:var(--text-secondary);margin-bottom:15px}.article-meta{color:var(--text-light);font-size:.9rem}.read-more{color:var(--primary-color);font-weight:500;text-decoration:none}.read-more:hover{text-decoration:underline}.loading{display:none;text-align:center;padding:30px}.loading-spinner{border:6px solid rgba(0,0,0,.1);border-left-color:var(--primary-color);border-radius:50%;width:50px;height:50px;animation:spin 1s linear infinite;margin:0 auto}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}.skip-link{position:absolute;top:-40px;left:0;background:var(--primary-color);color:#fff;padding:10px;z-index:100}.skip-link:focus{top:0}.main-footer{background-color:var(--footer-color);color:#fff;text-align:center;padding:2rem 0;margin-top:40px}.main-footer p{margin-bottom:0;font-size:.9rem}@media(print){.hero-section,.ad-section,.btn-custom,.main-footer{display:none}.container{width:100%;padding:0;margin:0}.tool-card,.extra-info,.info-section{break-inside:avoid;box-shadow:none;border:1px solid #ddd}}@media(max-width:768px){.hero-section h1{font-size:2rem}.hero-section p{font-size:1.1rem}.tool-card{padding:20px 15px}.extra-info{padding:25px 20px}}