:root {
  --white-color: #fafafb;
  --background-color: #17171e;
  --grey-color: #b5b5be;
  --dark-grey-color: #292932;
}

* {
  box-sizing: border-box;
}



.lead { font-size: 1.5rem; font-weight: 300; }
.container { margin: 150px auto; max-width: 960px; color: #000; }

.side-bar {
  width: 50.2rem;
  height: 100%;
  padding: 2.1rem 1.2rem;
  background-color: #FFFFFF;
  position: fixed;
  transition: all 0.5s ease;
  top: 0;
}

.logo-name-wrapper {
  position: relative;
  margin-bottom: 2.1rem;
  display: flex;
  font-size: 1.2rem;
}

.logo-name {
  display: flex;
  align-items: center;
}

.logo-name__name {
  margin-left: 0.9rem;
  white-space: nowrap;
}
.logo-name__button {
  position: absolute;
  top: 50%;
  right: 0;
  font-size: 1.8rem;
  transform: translateY(-50%);
  background-color: transparent;
  border: none;
  cursor: pointer;
}
.logo-name__icon {
  font-size: 1.8rem;
  color: var(--grey-color);
}





.side-bar.collapse {
  width: 6.4rem;
}

.side-bar.collapse .tooltip {
  display: block;
}

.side-bar.collapse .logo-name,
.side-bar.collapse .chat-item-status {
  opacity: 0;
  pointer-events: none;
}


.side-bar.collapse .logo-name__button {
  right: 0.5rem;
}

.side-bar.collapse .inbox-icon .status,
.side-bar.collapse .chat-item-avatar-wrapper::before {
  opacity: 1;
}