Яркая вывеска привлекла внимание.

Because вывеска is a feminine singular noun, and Russian adjectives must agree with the noun they describe in gender, number, and case.

• яркий = masculine singular
• яркая = feminine singular
• яркое = neuter singular
• яркие = plural

So:

• яркая вывеска = bright sign

Both words are in the nominative singular here, because this is the subject of the sentence.

In the past tense, Russian verbs agree with the subject in gender and number.

The subject is вывеска, which is feminine singular, so the verb is also feminine singular:

• привлёк = masculine
• привлекла = feminine
• привлекло = neuter
• привлекли = plural

So привлекла means attracted with a feminine singular subject.

Because Russian verbs agree with the subject, not the object.

In this sentence:

• Яркая вывеска = the subject
• привлекла = the verb
• внимание = the object

So the verb takes its feminine singular form from вывеска, not from внимание.

It is in the accusative case, because it is the direct object of the verb привлечь / привлекать.

The phrase привлечь внимание means to attract attention.

A useful detail: for this noun, the nominative and accusative singular look the same:

• nominative: внимание
• accusative: внимание

So even though the form does not change, the case is still accusative here because of its role in the sentence.

Russian does not have articles like English the and a/an.

So Яркая вывеска can mean:

• a bright sign
• the bright sign

Which one is intended depends on context. Russian usually leaves that information to the situation, word order, or extra words if needed.

This is a question of aspect.

• привлекла is perfective
• привлекала is imperfective

Here, привлекла presents the action as a completed whole: the sign caught or attracted attention.

By contrast, привлекала would suggest something more ongoing, repeated, or descriptive, such as:

• Яркая вывеска привлекала внимание прохожих.
  The bright sign used to attract / was attracting the attention of passers-by.

So in your sentence, the perfective form fits a single finished event or a simple statement of result.

Вывеска usually means a sign, especially a shop sign, business sign, or signboard attached to a building or storefront.

So it is more specific than any random sign in every context. Depending on the situation, it may suggest:

• a store sign
• a restaurant sign
• a business signboard

If you are imagining a bright sign outside a building, вывеска is a very natural word.

Yes. Russian word order is fairly flexible because case endings show grammatical roles.

The neutral order here is:

• Яркая вывеска привлекла внимание.

But other orders are possible, for example:

• Внимание привлекла яркая вывеска.
• Привлекла внимание яркая вывеска.

These versions can sound more emphatic or stylistically marked. English usually relies more on fixed word order, while Russian often uses word order to shift focus or emphasis.

The stress is:

• я́ркая
• вы́веска
• привлекла́
• внима́ние

So the sentence is pronounced approximately like:

• YAHR-kaya VY-ves-ka priv-lee-KLAH vnee-MAH-nee-ye

Stress matters in Russian, so it is worth learning words together with their stress.

It can mean bright in the literal sense, but it can also mean vivid, striking, showy, or eye-catching, depending on context.

With вывеска, яркая often suggests something visually noticeable, such as:

• brightly colored
• vivid
• flashy
• attention-grabbing

That is one reason the sentence sounds natural: a яркая вывеска is exactly the kind of thing that would привлечь внимание.