I was only able to watch the first half. Brazil defense seemed to be in a rush to move the ball forward while keeping it low, and that made them fragile over Croatias pressure from their forwards. They almost gave away a goal because of that. Fortunately, Brazil started to just take their time and Croatia had to give up on pressuring.
Oscar won the ball and even managed to break away from two players. His passes didn't reach by a margin most of the time, but I could tell it was only a matter of time for them to score, and indeed Neymar pulled a great goal.
I expected them to win the second half if they just kept their game going, and they did win. I'm going to watch the second half to see how they won.
EDIT: Just saw the penalty call and damn that was weak. Sure Lovren had his hand on Freds arm, but come on.
EDIT2: Brilliant touch and a cross by Oscar. Luiz almost had it in with that. Oh man I'm going to miss Luiz, aren't I?
EDIT3: Perfect shot by Oscar, but I wish I had a closer look on Ramireses tackle. It looked quite dangerous.