.app-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 2rem;
  padding: 0 0.75rem;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-xs);
  background: var(--app-surface);
  color: var(--app-text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.app-btn:hover {
  border-color: var(--app-accent);
  color: var(--app-accent-strong);
  box-shadow: var(--app-shadow-sm);
}

.app-btn--primary {
  border-color: var(--app-accent);
  background: var(--app-accent);
  color: #fff;
  box-shadow: 0 3px 10px rgba(16, 185, 129, 0.24);
}

.app-btn--primary:hover {
  border-color: var(--app-accent-strong);
  background: var(--app-accent-strong);
  color: #fff;
}

.app-btn--ghost {
  background: transparent;
  box-shadow: none;
}

.app-icon-btn {
  position: relative;
  width: 1.9rem;
  height: 1.9rem;
  padding: 0;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-xs);
  background: var(--app-surface);
  color: var(--app-text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.app-icon-btn:hover {
  border-color: var(--app-accent);
  color: var(--app-accent-strong);
  box-shadow: var(--app-shadow-sm);
}

.app-view-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.12rem;
  padding: 0.18rem;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-sm);
  background: var(--app-surface-muted);
}

.app-view-toggle__item {
  padding: 0.2rem 0.7rem;
  border-radius: 0.32rem;
  color: var(--app-text-muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.app-view-toggle__item.is-active {
  background: var(--app-surface);
  color: var(--app-accent-strong);
  box-shadow: var(--app-shadow-sm);
}