:root{--logo-width:200px;--logo-max-height:44px;--mobile-logo-width:170px;--mobile-logo-max-height:38px}header{position:sticky;top:0;width:100%;z-index:var(--z-sticky,1000);background:linear-gradient(135deg,rgba(26,26,26,.98),rgba(26,26,26,.95));-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .3s cubic-bezier(.4, 0, .2, 1);box-shadow:0 2px 8px rgba(0,0,0,.1)}header.scrolled{background:rgba(26,26,26,.98);box-shadow:0 4px 20px rgba(0,0,0,.25)}.header-container{padding:1rem 0;transition:padding .3s ease}header.scrolled .header-container{padding:.75rem 0}.header-content{display:flex;align-items:center;justify-content:space-between;gap:2rem}.header-logo{flex-shrink:0;z-index:1001}.logo-link{display:flex;align-items:center;gap:.75rem;text-decoration:none;transition:transform .25s ease}.logo-link:hover{transform:translateY(-1px)}.logo-link:focus-visible{outline:2px solid var(--obrk-green-secondary);outline-offset:4px;border-radius:var(--radius-sm,4px)}.logo-img{width:var(--logo-width);height:auto;max-height:var(--logo-max-height);object-fit:contain;transition:transform .25s ease,filter .25s ease}img.logo-img:not([src]),img.logo-img[src*=placeholder],img.logo-img[src='']{display:none}.logo-link:hover .logo-img{transform:translateY(-1px) scale(1.02);filter:drop-shadow(0 6px 12px rgba(0, 0, 0, .28))}.logo-text{font-weight:var(--font-weight-bold,700);letter-spacing:.08em;text-transform:uppercase;color:var(--obrk-green-secondary);font-size:1.5rem;line-height:1.2}.header-nav{flex:1;display:flex;justify-content:center}.nav-list{display:flex;align-items:center;gap:.5rem;list-style:none;margin:0;padding:0}.nav-item{margin:0}.nav-link{position:relative;display:flex;align-items:center;gap:.5rem;padding:.75rem 1rem;color:var(--obrk-white);text-decoration:none;font-weight:var(--font-weight-medium,500);font-size:var(--text-base, 1rem);border-radius:var(--radius-md,8px);transition:all .2s ease}.nav-link .material-symbols-outlined{font-size:1.25rem;transition:transform .2s ease}.nav-link:hover{background:rgba(116,170,31,.1);color:var(--obrk-green-secondary)}.nav-link:hover .material-symbols-outlined{transform:scale(1.1)}.nav-link.active{background:rgba(116,170,31,.15);color:var(--obrk-green-secondary);font-weight:var(--font-weight-semibold,600)}.nav-link.active::before{content:'';position:absolute;bottom:0;left:1rem;right:1rem;height:2px;background:var(--obrk-green-secondary);border-radius:2px}.nav-link:focus-visible{outline:2px solid var(--obrk-green-secondary);outline-offset:2px}.header-actions{display:flex;align-items:center;gap:1rem;flex-shrink:0}.header-phone{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;color:var(--obrk-white);text-decoration:none;font-weight:var(--font-weight-medium,500);border:1px solid rgba(255,255,255,.2);border-radius:var(--radius-md,8px);transition:all .2s ease}.header-phone:hover{border-color:var(--obrk-green-secondary);background:rgba(116,170,31,.1);color:var(--obrk-green-secondary)}.header-phone .material-symbols-outlined{font-size:1.25rem}.mobile-menu-btn{display:none;background:0 0;border:none;padding:.5rem;cursor:pointer;color:var(--obrk-white);transition:transform .2s ease;z-index:1001}.mobile-menu-btn:hover{transform:scale(1.05)}.mobile-menu-btn:focus-visible{outline:2px solid var(--obrk-green-secondary);outline-offset:2px;border-radius:var(--radius-sm,4px)}.hamburger{display:flex;flex-direction:column;gap:4px;width:28px;height:20px}.hamburger .bar{display:block;width:100%;height:3px;background:var(--obrk-white);border-radius:2px;transition:all .3s ease}.mobile-menu-btn[aria-expanded=true] .bar:first-child{transform:translateY(7px) rotate(45deg)}.mobile-menu-btn[aria-expanded=true] .bar:nth-child(2){opacity:0}.mobile-menu-btn[aria-expanded=true] .bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.mobile-menu{position:fixed;top:0;left:0;width:100%;height:100vh;height:100dvh;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;z-index:1000;pointer-events:none}.mobile-menu.active{opacity:1;visibility:visible;pointer-events:all}.mobile-menu-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.7);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.mobile-menu-content{position:absolute;top:0;right:0;width:min(85%,400px);height:100%;background:linear-gradient(180deg,rgba(26,26,26,.98),rgba(26,26,26,.95));-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);padding:2rem;display:flex;flex-direction:column;gap:2rem;transform:translateX(100%);transition:transform .3s cubic-bezier(.4, 0, .2, 1);overflow-y:auto;box-shadow:-4px 0 24px rgba(0,0,0,.3)}.mobile-menu.active .mobile-menu-content{transform:translateX(0)}.mobile-menu-header{display:flex;align-items:center;justify-content:space-between;padding-bottom:1.5rem;border-bottom:1px solid rgba(255,255,255,.1)}.mobile-logo{display:flex;align-items:center;gap:.75rem}.mobile-logo-img{width:var(--mobile-logo-width);height:auto;max-height:var(--mobile-logo-max-height);object-fit:contain}img.mobile-logo-img:not([src]),img.mobile-logo-img[src*=placeholder],img.mobile-logo-img[src='']{display:none}.mobile-menu-close{background:0 0;border:none;color:var(--obrk-white);cursor:pointer;padding:.5rem;transition:color .2s ease,transform .2s ease}.mobile-menu-close:hover{color:var(--obrk-green-secondary);transform:rotate(90deg)}.mobile-menu-close .material-symbols-outlined{font-size:2rem}.mobile-nav{flex:1}.mobile-nav-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.25rem}.mobile-nav-link{display:flex;align-items:center;gap:1rem;padding:1rem .75rem;color:var(--obrk-white);text-decoration:none;font-size:1.1rem;font-weight:var(--font-weight-medium,500);border-radius:var(--radius-md,8px);transition:all .2s ease}.mobile-nav-link .material-symbols-outlined{font-size:1.5rem;transition:transform .2s ease}.mobile-nav-link.active,.mobile-nav-link:hover{background:rgba(116,170,31,.15);color:var(--obrk-green-secondary);padding-left:1.25rem}.mobile-nav-link.active .material-symbols-outlined,.mobile-nav-link:hover .material-symbols-outlined{transform:scale(1.15)}.mobile-menu-actions{display:flex;flex-direction:column;gap:1rem;padding-top:1rem;border-top:1px solid rgba(255,255,255,.1)}.mobile-phone-btn{display:flex;align-items:center;justify-content:center;gap:.75rem;padding:1rem;color:var(--obrk-white);text-decoration:none;font-weight:var(--font-weight-semibold,600);border:2px solid var(--obrk-green-secondary);border-radius:var(--radius-md,8px);transition:all .2s ease}.mobile-phone-btn:hover{background:var(--obrk-green-secondary);color:var(--obrk-black);transform:translateY(-2px);box-shadow:0 4px 12px rgba(116,170,31,.3)}.mobile-phone-btn .material-symbols-outlined{font-size:1.5rem}.mobile-menu-footer{padding-top:1rem;border-top:1px solid rgba(255,255,255,.1);text-align:center;color:rgba(255,255,255,.6)}@media (min-width:993px) and (max-width:1280px){.nav-link{padding:.6rem .6rem;font-size:.85rem;gap:.3rem}.nav-link .material-symbols-outlined{font-size:1.05rem}}@media (max-width:992px){:root{--logo-width:180px;--logo-max-height:40px;--mobile-logo-width:160px;--mobile-logo-max-height:36px}.header-nav{display:none}.header-phone .phone-text{display:none}.header-actions .btn{display:none}.mobile-menu-btn{display:flex}}@media (max-width:768px){:root{--logo-width:150px;--logo-max-height:34px;--mobile-logo-width:140px;--mobile-logo-max-height:32px}.header-container{padding:.75rem 0}.header-content{gap:1rem}.logo-text{font-size:1.25rem}.header-phone{padding:.5rem}.mobile-menu-content{width:min(90%,350px);padding:1.5rem}}body.mobile-menu-open{overflow:hidden}@media (prefers-reduced-motion:no-preference){.logo-img,.mobile-logo-img{animation:logo-reveal .7s ease-out both}.nav-link::before{content:'';position:absolute;bottom:0;left:50%;width:0;height:2px;background:var(--obrk-green-secondary);transition:width .3s ease,left .3s ease}.nav-link:hover::before{width:calc(100% - 2rem);left:1rem}.mobile-nav-item{animation:slideInRight .3s ease forwards;opacity:0}.mobile-menu.active .mobile-nav-item:first-child{animation-delay:.1s}.mobile-menu.active .mobile-nav-item:nth-child(2){animation-delay:.15s}.mobile-menu.active .mobile-nav-item:nth-child(3){animation-delay:.2s}.mobile-menu.active .mobile-nav-item:nth-child(4){animation-delay:.25s}.mobile-menu.active .mobile-nav-item:nth-child(5){animation-delay:.3s}@keyframes slideInRight{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}@keyframes logo-reveal{from{opacity:0;transform:translateY(4px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}}@media (prefers-reduced-motion:reduce){*,::after,::before{animation-duration:0s!important;animation-iteration-count:1!important;transition-duration:0s!important}}:focus{outline:0}:focus-visible{outline:2px solid var(--obrk-green-secondary);outline-offset:2px}@media (prefers-contrast:high){header{border-bottom:2px solid var(--obrk-white)}.mobile-nav-link,.nav-link{border:1px solid transparent}.mobile-nav-link.active,.mobile-nav-link:hover,.nav-link.active,.nav-link:hover{border-color:var(--obrk-green-secondary)}}.nav-link{transition:background .2s ease,transform .2s ease}@media (prefers-reduced-motion:no-preference){.nav-link::before{left:1rem;right:1rem;width:auto;transform:scaleX(0);transform-origin:center;transition:transform .3s ease}.nav-link:hover::before{width:auto;left:1rem;transform:scaleX(1)}}.mobile-nav-link{transition:background .2s ease,color .2s ease,transform .2s ease}.mobile-nav-link.active,.mobile-nav-link:hover{padding-left:.75rem;transform:translateX(.5rem)}.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden;z-index:2001}.skip-link:focus{left:1rem;top:1rem;width:auto;height:auto;overflow:visible;padding:.65rem 1rem;background:var(--obrk-green-primary);color:var(--obrk-white);border-radius:6px;text-decoration:none;outline:2px solid var(--obrk-white);outline-offset:2px}header{min-height:72px}.header-container{min-height:72px;display:flex;align-items:center}header.scrolled .header-container{min-height:64px}