#topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--accent);
  height: 43px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

#app {
  max-width: 960px;
  margin: 0 auto;
}

#profile-header {
  background: var(--panel);
  border: 1px solid var(--border);
  border-top: none;
}

#body-wrap {
  max-width: 960px;
  margin: 8px auto;
  display: flex;
  gap: var(--gap);
}

.col-left {
  width: 300px;
  flex-shrink: 0;
}

.col-right {
  flex: 1;
  min-width: 0;
}

#login-root,
#setup-root {
  max-width: 960px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  #body-wrap { flex-direction: column; padding: 0 8px; }
  .col-left { width: 100%; }
  #topnav .inner { flex-wrap: wrap; height: auto; padding: 6px 8px; gap: 6px; }
  #topnav input[type="search"] { width: 120px; flex: 1; }
  #topnav .nav-actions { gap: 4px; }
  #topnav .nav-actions button { padding: 4px 6px; font-size: 11px; }
  .chat-window { width: calc(100vw - 20px); right: 10px !important; }
  .chat-window + .chat-window,
  .chat-window + .chat-window + .chat-window { display: none; }
  .profile-pic { width: 100px; height: 100px; margin-top: -50px; }
  .profile-strip { height: auto; padding-bottom: 8px; }
  #app { padding: 0; }
}