Werewolf (Loup garou) rules: how to play

The game

Six to eighteen players, each alone; the owner starts the table once six are seated. No bots: it's a game of talking.
About one player in four is a werewolf: 1 for 6 or 7 players, 2 for 8 to 11, 3 for 12 to 15, 4 for 16 to 18.
The special roles, one each (the owner may leave any out): the Seer, the Witch, the Hunter and Cupid. The Sheriff is elected. Everyone else is a Villager. Everyone knows which roles are in play, not who has them.
The roles are dealt at random; you see only your own card. The dead don't see the others' cards either; every card is shown at the end.

Everyone sleeps; the roles wake one after the other:

Cupid (the first night only) names two players, himself if he likes, who fall in love. Each lover learns who the other is, not their role.
The Seer looks at one player's card.
The werewolves see each other and choose a victim together: each points at someone and may change their mind; when all agree, it's done. When time runs out, the most pointed-at is the victim (a tie is drawn at random); nobody pointed at, nobody is eaten.
The Witch learns who the werewolves chose. She has two potions for the whole game, each used once: the potion of life saves tonight's victim (herself too), the potion of death kills anyone. She may use both the same night, or neither.
At dawn the night's dead are announced, with their cards turned over.

A dead player's card is shown to everyone. The dead no longer vote or talk with the living.
The lovers: when one dies, the other dies of grief at once.
The Hunter: when he dies, by night or by day, he shoots one living player, who dies too.
The Sheriff: when he dies, he names his successor among the living; if he names nobody in time, the village has no Sheriff any more.

The first day, the village elects a Sheriff: the most votes wins (a tie is drawn at random).
The village talks, then votes to eliminate one player. Votes are open, like a show of hands, and the Sheriff's counts double.
The most votes is eliminated and their card shown. A tie: the Sheriff chooses among the tied; with no Sheriff, or with nobody voting, nobody is eliminated.
Then night falls again.

The villagers win when no werewolf is left alive.
The werewolves win when only werewolves are left alive.
Lovers who are a werewolf and a non-werewolf play together against everyone: they win if they're the last two alive.
The game ends as soon as a side wins, and every card is shown.

A chat: by day the living talk to everyone; by night the werewolves talk among themselves; the dead talk only among themselves. Everything written is shown at the end.
Every step has a time limit and ends early once whoever must act has acted. The debate lasts up to three minutes, and ends early when most of the living ask for the vote.
A player who drops out does nothing until they're back.