Science fiction need not be "hard" SF, but rigor is appreciated. Fantasy can be folkloric, medieval, contemporary, surreal, etc. Horror can be supernatural or psychological, so long as it is frightening. There are no barriers as to levels of profanity, gore, or sexuality allowed, but high amounts of profanity, gore, and sexuality are generally used poorly. Be sure to use them well if you do use them.
Length: 1,000-8,000 words
Payment: 10¢ per word up to 4000 words, 5¢ per word after
Submission Guidelines: http://clarkesworldmagazine.com/submissions/