.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--border-subtle);background:var(--surface-card);color:var(--text-primary);cursor:pointer;transition:background .2s ease,border-color .2s ease,color .2s ease;flex-shrink:0}.theme-toggle:hover{background:var(--border-subtle);border-color:var(--accent-purple)}.theme-toggle svg{display:block}