.theme-toggle {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-m);
    border: 1px solid var(--border);
    background: transparent;
    cursor: pointer;
}
.theme-toggle:hover { background: var(--surface-2); }
.theme-toggle svg { width: 16px; height: 16px; }