the home site for me: also iteration 3 or 4 of my site
dunkirk.sh
1#theme-toggle-label i.icon {
2 --icon-dark: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M12 21q-3.775 0-6.388-2.613T3 12q0-3.45 2.25-5.988T11 3.05q.625-.075.975.45t-.025 1.1q-.425.65-.638 1.375T11.1 7.5q0 2.25 1.575 3.825T16.5 12.9q.775 0 1.538-.225t1.362-.625q.525-.35 1.075-.037t.475.987q-.35 3.45-2.937 5.725T12 21Zm0-2q2.2 0 3.95-1.213t2.55-3.162q-.5.125-1 .2t-1 .075q-3.075 0-5.238-2.163T9.1 7.5q0-.5.075-1t.2-1q-1.95.8-3.163 2.55T5 12q0 2.9 2.05 4.95T12 19Zm-.25-6.75Z'/%3E%3C/svg%3E");
3
4 --icon-light: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M12 15q1.25 0 2.125-.875T15 12q0-1.25-.875-2.125T12 9q-1.25 0-2.125.875T9 12q0 1.25.875 2.125T12 15Zm0 2q-2.075 0-3.538-1.463T7 12q0-2.075 1.463-3.538T12 7q2.075 0 3.538 1.463T17 12q0 2.075-1.463 3.538T12 17ZM2 13q-.425 0-.713-.288T1 12q0-.425.288-.713T2 11h2q.425 0 .713.288T5 12q0 .425-.288.713T4 13H2Zm18 0q-.425 0-.713-.288T19 12q0-.425.288-.713T20 11h2q.425 0 .713.288T23 12q0 .425-.288.713T22 13h-2Zm-8-8q-.425 0-.713-.288T11 4V2q0-.425.288-.713T12 1q.425 0 .713.288T13 2v2q0 .425-.288.713T12 5Zm0 18q-.425 0-.713-.288T11 22v-2q0-.425.288-.713T12 19q.425 0 .713.288T13 20v2q0 .425-.288.713T12 23ZM5.65 7.05L4.575 6q-.3-.275-.288-.7t.288-.725q.3-.3.725-.3t.7.3L7.05 5.65q.275.3.275.7t-.275.7q-.275.3-.687.288T5.65 7.05ZM18 19.425l-1.05-1.075q-.275-.3-.275-.713t.275-.687q.275-.3.688-.287t.712.287L19.425 18q.3.275.288.7t-.288.725q-.3.3-.725.3t-.7-.3ZM16.95 7.05q-.3-.275-.288-.687t.288-.713L18 4.575q.275-.3.7-.288t.725.288q.3.3.3.725t-.3.7L18.35 7.05q-.3.275-.7.275t-.7-.275ZM4.575 19.425q-.3-.3-.3-.725t.3-.7l1.075-1.05q.3-.275.712-.275t.688.275q.3.275.288.688t-.288.712L6 19.425q-.275.3-.7.288t-.725-.288ZM12 12Z'/%3E%3C/svg%3E");
5
6 --icon-toggle: var(--icon-light);
7
8 -webkit-mask-image: var(--icon-toggle);
9 mask-image: var(--icon-toggle);
10 background-color: var(--accent);
11 color: var(--accent);
12
13 width: 1.2rem;
14 height: 1.2rem;
15 transform: translateY(0.25rem);
16 overflow: visible;
17}