Mini Rest: Minimum 1 hour. Regain (1d4 +Con modifier) HP. Spellcasters gain +1 spell slot (of level 1 or 2) and 1/2 of spent cantrips. No sleep required.
Short Rest: Minimum 4 hours. Regain (class HD + Con mod) HP. Spellcasters gain +1 spent spell slot per spell level (1 level 1, 1 level 2, etc.) & all cantrips. Regain any racial traits/features spent. Recover 1 level of exhaustion. Must sleep at least 1 hour.
Long Rest: Minimum 8 hours. Regain 1/2 of any lost HP. Spellcasters regain 2 spent spell slots per spell level (2 level 1, 2 level 2, etc.) & all cantrips. Regain all racial and class traits/features spent. Recover 2 levels of exhaustion. Must sleep at least 6 hours.
Extended Rest: Minimum 12 hours. Regain all lost HP. Replenish all spent spell slots, racial and class traits/features. Recover from all levels of exhaustion. Must sleep at least 8 hours.