:root{--bg:#f7f9fb;--card:#ffffff;--text:#0b1a2b;--muted:#546274;--accent:#1967d2;--radius:10px;--max-width:1000px;--default-color:#2193b0;--default-text:#ffffff;--transition-speed:0.25s}*{box-sizing:border-box}body{padding-top:0!important;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial;background:var(--bg);color:var(--text);line-height:1.5;margin:0;font-family:Arial,sans-serif;transition:padding-top .3s ease}main.container{max-width:var(--max-width);margin:2rem auto;background:var(--card);border-radius:var(--radius);box-shadow:0 6px 24px rgba(0,0,0,.06);padding:1.25rem}section{padding:1rem 0;border-top:1px solid rgba(0,0,0,.05)}section:first-of-type{border-top:none}h2{font-size:1.1rem;margin-top:0}.header-nav,footer,header{padding:1rem;text-align:center;color:var(--default-text);transition:background var(--transition-speed) ease,color var(--transition-speed) ease}.header-nav a,.nav-links li a,.nav-list li a,footer a,header a{color:inherit;text-decoration:none;transition:color var(--transition-speed) ease}#banner-container{text-align:center;font-weight:700;width:100%;z-index:1000;transition:transform .3s ease}.announcement-banner{display:none;padding:.75rem 1rem;color:var(--default-text);background-color:var(--default-color);transition:background var(--transition-speed) ease,color var(--transition-speed) ease,transform .3s ease,opacity .3s ease;white-space:pre-line}.announcement-banner.active,.announcement-banner[style*="display: block"]{display:block}.announcement-banner p{color:inherit;font-weight:700;margin:0}.header-nav,.nav-bar{display:flex;justify-content:center;align-items:center;position:relative}.nav-links,.nav-list{list-style:none;display:flex;gap:1rem;padding:0;margin:0}.hamburger,.nav-toggle{background:0 0!important;display:none;font-size:2rem;cursor:pointer;position:center;left:50%;transform:translateX(-50%);user-select:none;color:inherit;border:0;z-index:1200}@media (max-width:768px){.nav-links li,.nav-list li{padding-top:.5rem}.nav-links li a,.nav-list li a{display:inline-block;margin-top:.3rem}.hamburger,.nav-toggle{display:block;transform:none!important}.nav-links,.nav-list{display:none;flex-direction:column;position:absolute;top:100%;left:50%;transform:translateX(-50%);background-color:rgba(0,0,0,.85);width:200px;margin-top:1rem;text-align:center;border-radius:4px}.nav-links.active,.nav-list.active{display:flex;z-index:1100;padding-bottom:30px}}