.site-header{--c-primary:#3629b7;--c-primary-dark:#241c7e;--c-primary-tint:#efecfb;--c-primary-tint-2:#f7f6fd;--c-accent-amber:#ff9f1c;--c-ink:#1c1733;--c-ink-soft:#5c5678;--c-border:#e5e1f7;--font-display:var(--font-vazirmatn),Tahoma,sans-serif;--container:1160px;position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--c-border)}@media (min-width:1280px){.site-header.site-header--static-desktop{position:relative;top:auto}}.site-header .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}.site-header .header-inner{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;height:76px;position:relative}.site-header .logo{display:flex;align-items:center;justify-content:flex-start;gap:10px;font-family:var(--font-display);font-weight:700;font-size:22px;color:var(--c-primary);text-decoration:none;justify-self:start;grid-column:1}.site-header .logo-text{font-size:1.08em;line-height:1}.site-header .logo img{width:40px;height:40px;object-fit:contain;border-radius:10px;display:block}.site-header .menu-toggle{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;width:42px;height:42px;border-radius:12px;color:var(--c-primary);background:var(--c-primary-tint);border:none;cursor:pointer;font-family:inherit;grid-column:3;justify-self:end;transition:background .2s ease,color .2s ease}.site-header .menu-toggle:hover{background:#e4dff8}.site-header .menu-toggle-bars{position:relative;width:20px;height:14px;display:block}.site-header .menu-toggle-bars span{position:absolute;left:0;right:0;height:2px;border-radius:2px;background:currentColor;transition:transform .28s cubic-bezier(.22,1,.36,1),opacity .2s ease,top .28s cubic-bezier(.22,1,.36,1)}.site-header .menu-toggle-bars span:first-child{top:0}.site-header .menu-toggle-bars span:nth-child(2){top:6px}.site-header .menu-toggle-bars span:nth-child(3){top:12px}.site-header.is-mobile-open .menu-toggle{pointer-events:none}.site-header.is-mobile-open .menu-toggle-bars span:first-child{width:72%;inset-inline-start:auto;inset-inline-end:0;left:auto;right:0}.site-header.is-mobile-open .menu-toggle-bars span:nth-child(2){width:100%;opacity:1;transform:none}.site-header.is-mobile-open .menu-toggle-bars span:nth-child(3){width:48%;inset-inline-start:auto;inset-inline-end:0;left:auto;right:0;top:12px;transform:none}.site-header .header-cta{display:none;align-items:center;gap:8px;grid-column:3;justify-self:end}.site-header .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border-radius:999px;font-size:13px;font-weight:700;text-decoration:none;transition:transform .18s ease,box-shadow .18s ease,background .18s ease;white-space:nowrap;border:none;cursor:pointer;font-family:inherit}.site-header .btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 8px 20px rgba(54,41,183,.28)}.site-header .btn-primary:hover{transform:translateY(-1px);background:var(--c-primary-dark)}.site-header .btn-icon{width:18px;height:18px;flex:none;display:block}.site-header nav.main-nav{display:none}.site-header nav.main-nav>ul{display:flex;align-items:center;gap:8px;list-style:none;margin:0;padding:0}.site-header .nav-item{position:relative}.site-header .nav-trigger{display:inline-flex;align-items:center;gap:6px;padding:10px 14px;border-radius:999px;font-size:15px;font-weight:600;color:var(--c-ink-soft);background:transparent;border:none;cursor:pointer;font-family:inherit;text-decoration:none;transition:color .15s,background .15s}.site-header .nav-item.is-open .nav-trigger,.site-header .nav-trigger:hover{color:var(--c-primary);background:var(--c-primary-tint)}.site-header .nav-dropdown{position:absolute;top:calc(100% + 10px);right:0;min-width:260px;max-height:min(70vh,520px);overflow-y:auto;background:#fff;border:1px solid var(--c-border);border-radius:18px;box-shadow:0 16px 40px rgba(28,23,51,.12);padding:8px;z-index:120}.site-header .nav-dropdown[hidden]{display:none}.site-header .grade-acc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}.site-header .grade-acc-trigger{width:100%;display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;font-size:14px;font-weight:600;color:var(--c-ink);background:transparent;border:none;cursor:pointer;font-family:inherit;text-align:right}.site-header .grade-acc-trigger:hover,.site-header .grade-acc.is-open>.grade-acc-trigger{background:var(--c-primary-tint-2);color:var(--c-primary)}.site-header .grade-acc-label{flex:1}.site-header .grade-acc-trigger svg{flex:none;color:var(--c-ink-soft);transition:transform .15s}.site-header .grade-acc.is-open>.grade-acc-trigger svg{transform:rotate(180deg);color:var(--c-primary)}.site-header .nav-rung{width:28px;height:28px;border-radius:8px;background:var(--c-primary-tint);color:var(--c-primary);display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-display);font-weight:700;font-size:13px;flex:none}.site-header .subject-sublist{list-style:none;padding:0 8px 6px;display:flex;flex-direction:column;gap:2px;border-right:2px solid var(--c-primary-tint);margin:0 22px 6px 0}.site-header .subject-sublist a{display:block;padding:8px 10px;border-radius:10px;font-size:13.5px;font-weight:500;color:var(--c-ink-soft);text-decoration:none}.site-header .subject-sublist a:hover{background:var(--c-primary-tint);color:var(--c-primary)}.site-header .mobile-sheet-root{position:fixed;inset:0;z-index:200;pointer-events:none;visibility:hidden}.site-header .mobile-sheet-root.is-open{pointer-events:auto;visibility:visible}.site-header .mobile-backdrop{position:absolute;inset:0;border:none;padding:0;margin:0;background:rgba(28,23,51,.42);opacity:0;cursor:pointer;transition:opacity .25s ease}.site-header .mobile-sheet-root.is-open .mobile-backdrop{opacity:1}.site-header .mobile-sheet{position:absolute;top:0;bottom:0;inset-inline-start:0;width:min(86vw,360px);background:#fff;box-shadow:-8px 0 32px rgba(28,23,51,.18);transform:translateX(110%);transition:transform .28s cubic-bezier(.22,1,.36,1);display:flex;flex-direction:column;overflow:hidden}.site-header .mobile-sheet-root.is-open .mobile-sheet{transform:translateX(0)}.site-header .mobile-panel-head{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:8px;min-height:64px;padding:12px 16px;border-bottom:1px solid var(--c-border);flex:none}.site-header .mobile-panel-title{font-family:var(--font-display);font-size:16px;font-weight:700;color:var(--c-ink);text-align:center;min-width:0}.site-header .mobile-back,.site-header .mobile-panel-close{display:inline-flex;align-items:center;gap:4px;border:none;background:var(--c-primary-tint);color:var(--c-primary);border-radius:12px;padding:8px 10px;font-size:13px;font-weight:700;cursor:pointer;font-family:inherit;flex:none;position:relative;z-index:2}.site-header .mobile-panel-close{padding:8px;justify-self:end}.site-header .mobile-panel-spacer{width:42px;justify-self:start}.site-header .mobile-back svg{transform:scaleX(-1)}.site-header .mobile-root-list{list-style:none;margin:0;padding:10px 12px 28px;display:flex;flex-direction:column;gap:4px;overflow-y:auto;flex:1;min-height:0}.site-header .mobile-row{width:100%;display:flex;align-items:center;gap:10px;padding:14px 12px;border-radius:14px;font-size:15px;font-weight:600;color:var(--c-ink);background:none;border:none;cursor:pointer;font-family:inherit;text-align:right;text-decoration:none}.site-header .mobile-row:active,.site-header .mobile-row:hover{background:var(--c-primary-tint-2);color:var(--c-primary)}.site-header .mobile-row-label{flex:1}.site-header .mobile-row svg{margin-inline-start:auto;color:var(--c-ink-soft);flex:none}@media (min-width:900px){.site-header .header-inner{grid-template-columns:auto 1fr auto}.site-header .menu-toggle{display:none}.site-header .logo{grid-column:1;justify-self:start;font-size:22px}.site-header .logo-text{font-size:1.08em}.site-header nav.main-nav{display:block;grid-column:2;justify-self:center}.site-header .header-cta{display:flex;grid-column:3}.site-header .header-cta .btn{padding:11px 20px;font-size:14px}.site-header .mobile-sheet-root{display:none}}.site-header a:focus-visible,.site-header button:focus-visible{outline:3px solid var(--c-accent-amber);outline-offset:2px;border-radius:8px}.site-header.site-header--brand{background:#3629b7;border-bottom:none;backdrop-filter:none;-webkit-backdrop-filter:none}.site-header.site-header--brand .header-inner{height:64px}.site-header.site-header--brand .logo{color:#fff}.site-header.site-header--brand .logo img{width:36px;height:36px;border-radius:0;filter:none}.site-header.site-header--brand .menu-toggle{color:#fff;background:rgba(255,255,255,.16)}.site-header.site-header--brand .menu-toggle:hover{background:rgba(255,255,255,.24)}.site-header.site-header--brand .nav-trigger{color:rgba(255,255,255,.88)}.site-header.site-header--brand .nav-item.is-open .nav-trigger,.site-header.site-header--brand .nav-trigger:hover{color:#fff;background:rgba(255,255,255,.16)}.site-header.site-header--brand .btn-on-brand{background:#fff;color:#3629b7;box-shadow:0 6px 16px rgba(28,23,51,.18)}.site-header.site-header--brand .btn-on-brand:hover{transform:translateY(-1px);background:#f7f6fd}.site-header.site-header--brand a:focus-visible,.site-header.site-header--brand button:focus-visible{outline-color:#ff9f1c}