#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--bg-base);
}

/* TopBar */
#topbar {
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  height: var(--topbar-height);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-subtle);
  border-radius: 0;
  gap: var(--space-lg);
}

.logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--text-primary);
  white-space: nowrap;
}

.nav-tabs {
  display: flex;
  gap: var(--space-md);
  margin-left: auto;
}

.nav-tab {
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color 200ms var(--ease-out), border-color 200ms var(--ease-out);
  background: none;
}

.nav-tab:hover {
  color: var(--text-primary);
}

.nav-tab.active {
  color: var(--text-primary);
  border-bottom-color: var(--color-aloy);
}

.topbar-search {
  width: 180px; padding: 6px 12px;
  background: var(--bg-glass); border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md); color: var(--text-primary);
  font-family: var(--font-body); font-size: var(--text-xs); outline: none;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: border-color 200ms var(--ease-out), width 200ms var(--ease-out);
}
.topbar-search::placeholder { color: var(--text-muted); }
.topbar-search:focus { border-color: rgba(255,255,255,0.16); width: 220px; }

.settings-btn {
  font-size: var(--text-lg);
  padding: var(--space-xs);
  opacity: 0.6;
  transition: opacity 200ms var(--ease-out);
}

.settings-btn:hover {
  opacity: 1;
}

/* Main Content */
#main-content {
  flex: 1;
  overflow: hidden;
  display: flex;
}

.view-container {
  display: none;
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
  animation: fade-in 200ms var(--ease-out);
}

.view-container.active {
  display: flex;
  flex-direction: column;
}

/* Footer */
#footer {
  height: var(--footer-height);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  font-size: var(--text-xs);
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
}

/* Activity Ticker */
#activity-ticker {
  position: fixed;
  bottom: var(--footer-height);
  left: 0;
  right: 0;
  z-index: 50;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-subtle);
  transition: height 200ms var(--ease-out);
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  gap: var(--space-sm);
}

#activity-ticker.collapsed {
  height: 32px;
  overflow: hidden;
}

#activity-ticker.expanded {
  height: 200px;
  overflow-y: auto;
  align-items: flex-start;
  padding-top: var(--space-sm);
}

.ticker-toggle {
  font-size: var(--text-xs);
  padding: var(--space-xs);
  opacity: 0.6;
  flex-shrink: 0;
}

.ticker-toggle:hover {
  opacity: 1;
}

.ticker-content {
  flex: 1;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  overflow: hidden;
}

/* Modal Container */
#modal-container {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

#modal-container.open {
  display: flex;
}

/* Responsive */
@media (max-width: 767px) {
  #topbar {
    padding: 0 var(--space-sm);
    gap: var(--space-sm);
  }
  .nav-tab {
    padding: var(--space-sm);
    font-size: var(--text-xs);
  }
  .logo {
    font-size: var(--text-base);
  }
  .view-container {
    padding: var(--space-sm);
  }
  #footer {
    font-size: var(--text-xs);
    gap: var(--space-sm);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .view-container.active {
    flex-direction: column;
  }
}

@media (min-width: 1024px) {
  #view-dashboard.active {
    flex-direction: row;
  }
}