.back-header{z-index:1000;background:var(--card);border-bottom:1px solid var(--border);align-items:center;width:100%;height:64px;transition:all .3s;display:flex;position:fixed;top:0;left:0}.back-header--scrolled{background:var(--card);box-shadow:var(--shadow-sm)}.back-header__container{width:100%;max-width:1400px;padding:0 calc(var(--spacing) * 4);align-items:center;gap:calc(var(--spacing) * 3);height:100%;margin:0 auto;display:flex}.back-header__back-btn{border-radius:var(--radius);width:40px;height:40px;color:var(--foreground);cursor:pointer;background:0 0;border:none;flex-shrink:0;justify-content:center;align-items:center;transition:all .2s;display:flex}.back-header__back-btn:hover{background:var(--secondary);color:var(--primary)}.back-header__back-btn:active{transform:scale(.95)}.back-header__title{color:var(--foreground);white-space:nowrap;text-overflow:ellipsis;flex:1;margin:0;font-size:1.125rem;font-weight:700;overflow:hidden}.back-header__right{align-items:center;gap:calc(var(--spacing) * 2);flex-shrink:0;display:flex}@media (max-width:768px){.back-header{height:56px}.back-header__container{padding:0 calc(var(--spacing) * 3);gap:calc(var(--spacing) * 2)}.back-header__back-btn{width:36px;height:36px}.back-header__title{font-size:1rem}}