Det var ett smart drag.

Here det refers to a whole action, decision, or situation, not to a specific noun. In Swedish, that is very common.

So det var ett smart drag means something like that was a smart move or it was a smart move.

Swedish often uses det where English might use either it or that:

• Det var bra. = That was good.
• Det var dumt. = That was stupid.

So in this sentence, det is the natural choice.

Var is the past tense of är (is/are).

• är = is/am/are
• var = was/were

So:

• Det är ett smart drag. = It is a smart move.
• Det var ett smart drag. = It was a smart move.

The speaker is talking about something that has already happened, so var is used.

Because drag is an ett-word in Swedish. Swedish nouns have two grammatical genders:

• en words
• ett words

Since drag is neuter, its indefinite article is ett:

• ett drag = a move
• draget = the move

You simply have to learn the gender along with the noun.

Good question. Swedish adjectives usually change form depending on the noun.

With an indefinite ett-word, many adjectives add -t:

• en stor bil = a big car
• ett stort hus = a big house

But smart already ends in -t, so it does not visibly change:

• en smart idé
• ett smart drag

So the neuter form is still smart, not anything extra like smartt.

In this sentence, drag means move, step, tactic, or play in a strategic sense.

It can be used for:

• games
• negotiations
• social situations
• decisions
• clever actions in general

So ett smart drag is a natural way to say a smart move.

It does not mean a physical dragging action here.

Yes. Drag is related to dra (to pull/draw), but in this sentence the noun has developed a broader meaning.

Depending on context, drag can mean things like:

• a move
• a stroke
• a pull
• a feature or trait in some expressions

Here, the idiomatic meaning is move or tactical action.

Yes. Det var smart is perfectly natural and means That was smart.

The difference is:

• Det var smart. = general comment
• Det var ett smart drag. = more specific; it labels the action as a smart move

So the version with ett smart drag is a little more concrete and expressive.

It can match either one in English, depending on context.

In Swedish, det often covers both English it and that in sentences like this. So:

• Det var ett smart drag. could be translated as:
• That was a smart move.
• It was a smart move.

English usually chooses based on style and context, while Swedish naturally uses det here.

It is very natural. It sounds neutral, idiomatic, and common in everyday Swedish.

You could use it:

• after someone makes a clever decision
• after a good move in a game
• after a smart strategic choice
• after someone handles a situation well

It is neither especially formal nor especially slangy.

A careful pronunciation is roughly:

deh var ett smart drahg

A few helpful notes:

• det is often pronounced more like de in everyday speech
• var sounds roughly like vahr
• ett is short and unstressed
• drag has a long a sound, somewhat like drahg

In natural speech, the sentence may sound closer to:

De va ett smart drag.

That reduced pronunciation is very common in spoken Swedish.