.app-header{height:76px;padding:12px 16px;display:flex;align-items:center;justify-content:space-between;background:rgba(243,245,249,.92);backdrop-filter:blur(12px);position:sticky;top:0;z-index:10}.brand{display:flex;gap:10px;align-items:center}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--blue);color:#fff;font-weight:900;font-size:21px}.brand strong{display:block;font-size:16px;letter-spacing:-.05em}.brand strong span{color:var(--blue)}.brand small,.refresh-button small{display:block;font-size:10px;color:var(--muted);margin-top:2px}.refresh-button{background:transparent;color:var(--blue);display:flex;gap:6px;align-items:center}.bottom-nav{position:fixed;z-index:20;bottom:0;left:50%;transform:translateX(-50%);width:min(100%,480px);height:70px;background:rgba(255,255,255,.96);border-top:1px solid var(--line);display:flex;justify-content:space-around;padding:8px 4px env(safe-area-inset-bottom)}.nav-item{background:transparent;color:#98a2b3;display:flex;flex-direction:column;align-items:center;gap:3px;font-size:10px;min-width:58px}.nav-item .icon{font-weight:900;font-size:19px}.nav-item.is-active{color:var(--blue)}.desktop-sidebar{display:none}