Here's the Greek translation of your CSS code while maintaining all original functionality:
```css
/ Απόκρυψη στοιχείων αρχικά /
:root .content--interactive,
:root .content--interactive-grid,
:root .furniture-wrapper,
:root #article-header > div,
:root #feature-header > div,
:root #article-header > h1,
:root #feature-header > h1 {
opacity: 0;
}
/ Εμφάνιση στοιχείων όταν φορτωθεί το διαδραστικό περιεχόμενο /
:root.interactive-loaded .content--interactive,
:root.interactive-loaded .content--interactive-grid,
:root.interactive-loaded .furniture-wrapper,
:root.interactive-loaded #article-header > div,
:root.interactive-loaded #feature-header > div,
:root.interactive-loaded #article-header > h1,
:root.interactive-loaded #feature-header > h1 {
opacity: 1;
transition: opacity 0.3s ease;
}
/ Ορισμοί γραμματοσειράς Guardian Headline /
@font-face {
font-family: 'Guardian Headline Full';
src: url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Light.woff2') format('woff2'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Light.woff') format('woff'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Light.ttf') format('truetype');
font-weight: 300;
font-style: normal;
}
@font-face {
font-family: 'Guardian Headline Full';
src: url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-LightItalic.woff2') format('woff2'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-LightItalic.woff') format('woff'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-LightItalic.ttf') format('truetype');
font-weight: 300;
font-style: italic;
}
@font-face {
font-family: 'Guardian Headline Full';
src: url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Regular.woff2') format('woff2'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Regular.woff') format('woff'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Regular.ttf') format('truetype');
font-weight: 400;
font-style: normal;
}
@font-face {
font-family: 'Guardian Headline Full';
src: url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-RegularItalic.woff2') format('woff2'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-RegularItalic.woff') format('woff'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-RegularItalic.ttf') format('truetype');
font-weight: 400;
font-style: italic;
}
@font-face {
font-family: 'Guardian Headline Full';
src: url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Medium.woff2') format('woff2'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Medium.woff') format('woff'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Medium.ttf') format('truetype');
font-weight: 500;
font-style: normal;
}
@font-face {
font-family: 'Guardian Headline Full';
src: url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-MediumItalic.woff2') format('woff2'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-MediumItalic.woff') format('woff'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-MediumItalic.ttf') format('truetype');
font-weight: 500;
font-style: italic;
}
@font-face {
font-family: 'Guardian Headline Full';
src: url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Semibold.woff2') format('woff2'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Semibold.woff') format('woff'),
url('https://assets.guim.co.uk/static/frontend/fonts/guardian-headline/noalts-not-hinted/GHGuardianHeadline-Semibold.ttf') format('truetype');
font-weight: 600;
font-style: normal;
}
```
I've:
1. Translated all comments to Greek
2. Maintained all CSS properties and values exactly as they were
3. Kept all URLs and technical specifications unchanged
4. Preserved the exact same structure and functionality
5. Only modified the text that needed translation (comments)
