:root{--header-height:76px;--header-bg:rgba(255,255,255,0.82);--header-border:rgba(218,228,239,0.65);--accent-primary:#087ff5;--accent-glow:rgba(8,127,245,0.15);--text-main:#0f172a;--text-muted:#64748b;--text-light:#94a3b8;--ease-spring:cubic-bezier(0.16,1,0.3,1)}.site-header{position:sticky;top:0;z-index:1000;width:100%;border-bottom:1px solid var(--header-border);background:var(--header-bg);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);box-shadow:inset 0 1px 0 rgba(255,255,255,.9),0 10px 30px -10px rgba(15,23,42,.05);transition:all .3s var(--ease-spring)}.header-container{width:100%;max-width:1440px;height:var(--header-height);margin:0 auto;padding:0 32px;display:flex;justify-content:space-between;gap:24px;box-sizing:border-box}.header-container,.header-logo-link{position:relative;align-items:center}.header-logo-link{display:inline-flex;justify-content:center;flex-shrink:0;text-decoration:none;padding:4px;border-radius:12px}.header-logo{position:relative;z-index:2;display:block;width:120px;height:105px;-o-object-fit:contain;object-fit:contain;transition:transform .3s var(--ease-spring),filter .3s var(--ease-spring)}.header-logo-link:hover .header-logo{transform:translateY(-1px) scale(1.02);filter:drop-shadow(0 6px 16px rgba(8,127,245,.2))}.header-logo-glow{position:absolute;width:60px;height:32px;left:50%;top:50%;transform:translate(-50%,-50%);border-radius:50%;background:var(--accent-primary);opacity:.12;filter:blur(20px);pointer-events:none;transition:opacity .3s ease}.header-logo-link:hover .header-logo-glow{opacity:.25}.desktop-navigation{display:flex;gap:6px;margin-left:auto;margin-right:auto;padding:4px 6px;background:rgba(241,245,249,.5);border:1px solid rgba(226,232,240,.6);backdrop-filter:blur(8px)}.desktop-nav-link,.desktop-navigation{align-items:center;justify-content:center;border-radius:999px}.desktop-nav-link{position:relative;display:inline-flex;min-height:38px;padding:0 16px;color:#334155;font-size:13.5px;font-weight:600;letter-spacing:-.01em;line-height:1;text-decoration:none;white-space:nowrap;transition:color .2s ease,background .2s ease,transform .2s var(--ease-spring)}.desktop-nav-link:hover{color:var(--accent-primary);background:#ffffff;box-shadow:0 2px 8px rgba(15,23,42,.04)}.desktop-nav-link:active{transform:scale(.97)}.courses-menu{position:relative;display:flex;align-items:center;height:100%}.courses-menu-trigger{gap:6px;border:0;background:transparent;font-family:inherit;cursor:pointer}.courses-chevron{transition:transform .3s var(--ease-spring),color .2s ease}.courses-menu-open .courses-chevron{transform:rotate(180deg);color:var(--accent-primary)}.courses-menu-open .courses-menu-trigger{color:var(--accent-primary);background:#ffffff;box-shadow:0 2px 8px rgba(15,23,42,.04)}.courses-mega-menu{position:absolute;top:calc(100% + 12px);left:50%;z-index:1200;display:grid;grid-template-columns:260px minmax(460px,1fr);width:min(840px,calc(100vw - 32px));max-height:min(620px,80vh);overflow:hidden;transform:translateX(-35%);border:1px solid rgba(226,232,240,.8);border-radius:24px;background:rgba(255,255,255,.96);backdrop-filter:blur(25px);box-shadow:0 20px 50px -10px rgba(15,23,42,.12),0 10px 20px -5px rgba(15,23,42,.04);animation:megaMenuIn .25s var(--ease-spring)}@keyframes megaMenuIn{0%{opacity:0;transform:translateX(-35%) translateY(-10px) scale(.98)}to{opacity:1;transform:translateX(-35%) translateY(0) scale(1)}}.courses-menu-list{padding:16px;background:linear-gradient(180deg,#f8fafc,#f1f5f9);border-right:1px solid #e2e8f0}.courses-menu-label{display:flex;align-items:center;gap:8px;padding:8px 10px 12px;color:var(--text-muted);font-size:10px;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.courses-menu-label svg{color:var(--accent-primary)}.courses-menu-item{position:relative;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;margin-bottom:6px;padding:10px 12px;border:1px solid transparent;border-radius:14px;color:#334155;text-decoration:none;transition:all .2s var(--ease-spring)}.courses-menu-item.active,.courses-menu-item:focus-visible,.courses-menu-item:hover{border-color:rgba(8,127,245,.2);background:#ffffff;color:var(--accent-primary);outline:none;box-shadow:0 4px 12px rgba(8,127,245,.08);transform:translateX(3px)}.courses-menu-item-content{min-width:0}.courses-menu-item strong{display:block;font-size:13px;font-weight:700;line-height:1.3}.courses-menu-item small{display:block;margin-top:3px;color:var(--text-muted);font-size:10.5px;line-height:1.35}.course-arrow{display:flex;align-items:center;justify-content:center;width:26px;height:26px;flex:0 0 auto;border-radius:8px;background:rgba(241,245,249,.8);color:var(--text-muted);transition:all .2s ease}.courses-menu-item.active .course-arrow,.courses-menu-item:hover .course-arrow{background:var(--accent-primary);color:#ffffff;transform:translateX(2px)}.courses-menu-details{min-width:0;padding:28px}.courses-menu-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding-bottom:20px;border-bottom:1px solid #f1f5f9}.courses-eyebrow{display:inline-flex;align-items:center;padding:4px 8px;border-radius:6px;background:rgba(8,127,245,.08);color:var(--accent-primary);font-size:9px;font-weight:800;letter-spacing:.1em}.courses-menu-heading h2{margin:8px 0 0;color:var(--text-main);font-size:22px;font-weight:800;letter-spacing:-.02em}.courses-menu-heading p{max-width:380px;margin:6px 0 0;color:var(--text-muted);font-size:12px;line-height:1.5}.courses-menu-heading-links{display:flex;align-items:center;gap:8px;flex-shrink:0}.courses-menu-heading-links a{display:inline-flex;align-items:center;gap:4px;padding:8px 12px;border-radius:10px;background:#f8fafc;color:var(--accent-primary);font-size:11px;font-weight:700;text-decoration:none;white-space:nowrap;transition:all .2s ease}.courses-menu-heading-links a:hover{background:rgba(8,127,245,.08);transform:translateY(-1px)}.courses-menu-categories{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;padding-top:24px}.course-category h3{margin:0 0 10px;color:var(--text-light);font-size:10px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.course-category-links{display:flex;flex-direction:column}.course-category-links a{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 10px;margin-left:-10px;border-radius:8px;color:#334155;font-size:12px;font-weight:600;text-decoration:none;transition:all .2s ease}.course-category-links a:hover{padding-left:14px;background:#f8fafc;color:var(--accent-primary)}.course-category-links a svg{opacity:0;transform:translateX(-4px);transition:all .2s ease}.course-category-links a:hover svg{opacity:1;transform:translateX(0)}.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}.language-button{height:40px;display:flex;align-items:center;justify-content:center;gap:6px;padding:0 14px;border:1px solid #e2e8f0;border-radius:999px;background:#ffffff;color:#334155;font-family:inherit;font-size:12px;font-weight:650;cursor:pointer;transition:all .2s var(--ease-spring)}.language-button:hover{border-color:rgba(8,127,245,.3);box-shadow:0 4px 12px rgba(15,23,42,.06);transform:translateY(-1px)}.header-login-button a,.header-register-button a{min-height:40px!important;height:40px;border-radius:999px!important;padding:0 20px!important;font-size:13px!important;font-weight:650;line-height:1;transition:all .2s var(--ease-spring)}.header-login-button a:hover{background:#f8fafc;transform:translateY(-1px)}.header-register-button a{background:var(--accent-primary);box-shadow:0 4px 14px rgba(8,127,245,.3)}.header-register-button a:hover{box-shadow:0 6px 20px rgba(8,127,245,.4);transform:translateY(-1px)}.mobile-menu-button{display:none;width:42px;height:42px;align-items:center;justify-content:center;padding:0;border:1px solid #e2e8f0;border-radius:12px;background:#ffffff;color:var(--text-main);cursor:pointer;box-shadow:0 2px 6px rgba(15,23,42,.04);transition:all .2s var(--ease-spring)}.mobile-menu-button-open,.mobile-menu-button:hover{border-color:var(--accent-primary);background:rgba(8,127,245,.05);color:var(--accent-primary);transform:translateY(-1px)}.mobile-navigation-wrapper{display:none;border-top:1px solid #e2e8f0;background:rgba(255,255,255,.95);backdrop-filter:blur(20px);box-shadow:0 20px 40px rgba(15,23,42,.08);animation:mobileMenuIn .25s var(--ease-spring)}@keyframes mobileMenuIn{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.mobile-navigation{width:100%;max-width:1440px;margin:0 auto;padding:16px 24px 24px;box-sizing:border-box;display:flex;flex-direction:column}.mobile-menu-top{padding:4px 4px 12px;color:var(--text-light);font-size:10px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.mobile-nav-link{display:flex;align-items:center;justify-content:space-between;width:100%;padding:14px 8px;border:0;border-bottom:1px solid #f1f5f9;color:var(--text-main);background:transparent;font-family:inherit;font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;transition:all .2s ease}.mobile-nav-link:hover{color:var(--accent-primary);padding-left:12px}.mobile-link-arrow{color:var(--text-light);transition:transform .2s ease}.mobile-nav-link:hover .mobile-link-arrow{color:var(--accent-primary);transform:translateX(3px)}.mobile-course-list{padding:8px 0 8px 12px}.mobile-course-section{margin-bottom:6px;border:1px solid transparent;border-radius:12px;overflow:hidden;transition:all .2s ease}.mobile-course-section.active{border-color:#e2e8f0;background:#f8fafc}.mobile-course-name{display:flex;align-items:center;justify-content:space-between;width:100%;padding:12px;border:0;background:transparent;color:var(--text-main);font-family:inherit;font-size:13px;font-weight:700;cursor:pointer}.mobile-course-links{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:4px 12px 14px}.mobile-course-links a{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;border-radius:8px;color:var(--text-muted);font-size:12px;font-weight:550;text-decoration:none;transition:all .2s ease}.mobile-course-links a:hover{background:#ffffff;color:var(--accent-primary);box-shadow:0 2px 6px rgba(15,23,42,.04)}.mobile-course-overview{grid-column:1/-1;background:rgba(8,127,245,.08);color:var(--accent-primary)!important;font-weight:700!important}.mobile-actions{display:flex;gap:12px;padding-top:20px}.mobile-action-button{flex:1}.mobile-action-button a{width:100%;min-height:44px!important;display:flex;align-items:center;justify-content:center;border-radius:12px!important}@media (min-width:1440px){.header-container{max-width:1530px;padding:0 40px}}@media (max-width:1199px) and (min-width:769px){.header-container{padding:0 20px}.desktop-navigation{gap:2px}.desktop-nav-link{padding:0 12px;font-size:12.5px}.courses-mega-menu{grid-template-columns:230px minmax(380px,1fr);width:min(720px,calc(100vw - 32px));transform:translateX(-40%)}}@media (max-width:768px){.header-container{height:66px;padding:0 20px}.desktop-navigation,.header-actions{display:none}.mobile-menu-button{display:inline-flex}.mobile-navigation-wrapper{display:block}}@media (max-width:480px){.header-container{height:60px;padding:0 16px}.header-logo{width:100px;height:105px;margin-top:5px}.mobile-course-links{grid-template-columns:1fr}}.courses-menu-item:focus-visible,.desktop-nav-link:focus-visible,.header-logo-link:focus-visible,.mobile-course-links a:focus-visible,.mobile-course-name:focus-visible,.mobile-menu-button:focus-visible,.mobile-nav-link:focus-visible{outline:2px solid var(--accent-primary);outline-offset:3px}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;transition-duration:.01ms!important}}