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CSS Theming experiment
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1"> | |
| <title></title> | |
| <link href="style.css" rel="stylesheet"> | |
| </head> | |
| <body> | |
| <main> | |
| <div class="contrast-element"> | |
| <h1> Sample text with contrast background</h1> | |
| </div> | |
| <div> | |
| <a href="javascript:document.body.className='dark'">Dark mode</a><br> | |
| <a href="javascript:document.body.className='light'">Light mode</a><br> | |
| <a href="javascript:document.body.className=''">No mode</a> | |
| </div> | |
| </main> | |
| </body> | |
| </html> |
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| body, body.light { | |
| --color-primary: #333; | |
| --color-secondary: #f0f0f0; | |
| --color-links: #00f; | |
| } | |
| body.dark { | |
| --color-primary: #f0f0f0; | |
| --color-secondary: #333; | |
| --color-links: #0ff; | |
| } | |
| /* For Browser/OS configured color preferences */ | |
| @media (prefers-color-scheme: light) { | |
| body { | |
| --color-primary: #333; | |
| --color-secondary: #f0f0f0; | |
| --color-links: #00f; | |
| } | |
| } | |
| @media (prefers-color-scheme: dark) { | |
| body { | |
| --color-primary: #f0f0f0; | |
| --color-secondary: #333; | |
| --color-links: #0ff; | |
| } | |
| } | |
| /* Common styles, no color definitions withouth variables beyone this point */ | |
| body { | |
| background-color: var(--color-secondary); | |
| color: var(--color-primary); | |
| } | |
| a { | |
| color: var(--color-links); | |
| } | |
| div { | |
| margin: 10px; | |
| } | |
| .contrast-element { | |
| border: solid 2px hwb(from var(--color-primary) h w calc( b - 10 )); | |
| border-radius: 5px; | |
| padding: 10px; | |
| color: var(--color-secondary); | |
| background-color: var(--color-primary); | |
| } |
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