body{font-family:Arial,sans-serif;background-color:#fff;display:flex;flex-direction:column;min-height:100vh}.site-logo{width:40px;height:auto}.tools-logo{width:50px;height:auto}header{display:flex;justify-content:space-between;align-items:center;background-color:#fff;color:#333;padding:15px 20px;box-shadow:0 4px 8px rgba(0,0,0,.1);position:fixed;width:100%;top:0;z-index:1000}header .logo{display:flex;align-items:center}header .logo img{margin-right:10px}header .logo a{color:#2c547c;text-decoration:none;font-size:1.4em;font-size:larger;font-family:math}nav ul{list-style:none;display:flex}nav ul li{position:relative;margin:0 15px}nav ul li a{color:#333;text-decoration:none;font-size:1em;padding:10px;transition:background-color .3s ease}nav ul li a:hover{background-color:#f1f1f1;border-radius:5px}nav ul li ul{display:none;position:absolute;top:100%;left:0;background-color:#fff;box-shadow:0 4px 8px rgba(0,0,0,.1);min-width:180px;padding:10px 0;z-index:1000}nav ul li:hover>ul{display:block}nav ul li ul li{margin:0}nav ul li ul li a{padding:10px 20px;color:#333;white-space:nowrap}nav ul li ul li a:hover{background-color:#e0e0e0}nav ul li ul li ul{left:100%;top:0;display:none}nav ul li ul li:hover>ul{display:block}.menu-toggle{display:none;flex-direction:column;justify-content:space-around;width:25px;height:20px;cursor:pointer}.menu-toggle .bar{width:100%;height:3px;background-color:#333}section{padding:80px 20px 50px;text-align:center;flex:1}@media(max-width:768px){nav ul{display:none;width:100%;flex-direction:column;text-align:center}nav ul li{margin:10px 0}nav ul li a{padding:10px;display:block}.menu-toggle{display:flex}nav ul.active{display:flex;flex-direction:column;position:fixed;top:0;right:0;width:60%;height:auto;background-color:#fff;box-shadow:-4px 0 10px rgba(0,0,0,.2);padding:0%;z-index:1000;border-left:4px solid #3784d1;border-radius:10px}nav ul li ul{position:static;box-shadow:none;display:none;width:100%}nav ul li:hover>ul{display:block}nav ul li ul li a{padding:15px}nav ul li ul li ul{left:0;top:0;display:none}nav ul li ul li:hover>ul{display:block}}.site-footer{background-color:#fff;padding:60px 20px 30px;font-family:'Inter',sans-serif;color:#444;border-top:1px solid #e0e0e0}.footer-container{max-width:1200px;margin:0 auto;display:flex;flex-wrap:wrap;gap:40px;justify-content:space-between}.footer-about{flex:2;min-width:280px}.footer-about p{margin-bottom:10px;line-height:1.6;color:#555}footer-strong{color:#3784d1}.footer-links{flex:1;min-width:200px}.footer-links h4{color:#3784d1;margin-bottom:12px;font-size:18px}.footer-links ul{list-style:none;padding:0;margin:0}.footer-links li{margin-bottom:10px}.footer-links a{color:#444;text-decoration:none;font-size:15px}.footer-links a:hover{color:#3784d1}.footer-social{flex:1;min-width:200px}.footer-social h4{color:#3784d1;margin-bottom:12px;font-size:18px}.social-icons{display:flex;align-items:center;gap:12px}.social-icons a img{width:24px;height:24px;filter:invert(33%) sepia(88%) saturate(343%) hue-rotate(180deg) brightness(90%) contrast(90%);transition:filter .3s ease}.social-icons a:hover img{filter:invert(24%) sepia(64%) saturate(800%) hue-rotate(190deg) brightness(100%) contrast(105%)}.footer-bottom{text-align:center;padding-top:30px;font-size:14px;color:#888;border-top:1px solid #eee;margin-top:30px}.input-with-validation{position:relative}.modern-tooltip{position:absolute;bottom:110%;left:-110px;background-color:#e6f7ff;color:#0077b3;border:1px solid #0077b3;padding:8px 12px;border-radius:6px;font-size:13px;box-shadow:0 2px 8px rgba(0,0,0,.1);display:none;white-space:nowrap;z-index:10;transition:opacity .2s ease-in-out}.modern-tooltip{opacity:0;pointer-events:none}input.invalid+.modern-tooltip{display:block;opacity:1;pointer-events:auto}input.invalid{border:2px solid #ed5533;outline:0;background:#fae9e5}@media(max-width:768px){.footer-container{flex-direction:column;text-align:center}.footer-about,.footer-links,.footer-social{padding-bottom:20px}.social-icons{justify-content:center}.footer-links ul{padding:0}}.ad-space img{border:0;outline:0;display:block;max-width:100%}.ad-space{width:160px;min-height:300px;position:sticky;text-align:center}@media(max-width:991.98px){.ad-space{display:none!important}}@media(max-width:480px){section{padding:80px 20px 50px;text-align:center;flex:1}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0;white-space:nowrap}.new-tag{background-color:#e63946;color:#fff;font-size:10px;font-weight:bold;padding:2px 5px;border-radius:4px;margin-left:6px;vertical-align:super}.corner-tag{position:absolute;top:0;right:0}