The article "The Bitcoin Lightning Network Summary" by lightning.network mentions:
"Lightning enables one to send funds down to 0.00000001 bitcoin without custodial risk. The bitcoin blockchain currently enforces a minimum output size many hundreds of times higher(1), and a fixed per-transaction fee(2) which makes micropayments impractical. Lightning allows minimal payments denominated in bitcoin, using actual bitcoin transactions."
(1) Is there in (standard) Bitcoin a limitation for minimum amount of payment (output size)?
(2) Is there a fixed per-transaction fee for payments in Bitcoin? And if yes, how much is this fee amount?