.bg-black { background-color: #000 }
.bg-mercury { background-color: #e8e8e8 }
.bg-san-marino { background-color: #3f7b9f }
.bg-white { background-color: #fff }

.border-black { border-color: #000 }
.border-white { border-color: #fff }

.hover-bg-white:hover { background-color: #fff }

.hover-color-white:hover { color: #fff }

.transition-all { transition: 500ms ease all }
.transition-bg { transition: 500ms ease background-color }
.transition-color { transition: 500ms ease color }

.text-black { color: #000 }
.text-shark { color: #333537 }
.text-white { color: #fff }