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

* {
  box-sizing: border-box;
}

html,
body {
  font-family: 'Poppins', sans-serif;
  font-size: 62.5%;
  font-weight: 500;
}

body {
  font-family: 'Poppins', sans-serif;
  font-size: 1.4rem;
  color: var(--white-color);
  height: 100vh;
  background-color: #fafafa;
}

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

.side-bar {
  width: 23.2rem;
  height: 100%;
  padding: 2.1rem 1.2rem;
  background-color: #17171e;
  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);
}



.category-list {
  padding-top: 2.1rem;
  padding-bottom: 0.9rem;
  color: var(--grey-color);
  list-style: none;
  font-size: 1.2rem;
  font-weight: 500;
  border-bottom: 1px solid #292932;
}

.category-header {
  font-size: 1.2rem;
  text-transform: uppercase;
  line-height: 1.8rem;
  color: var(--white-color);
  margin-bottom: 1.3rem;
  white-space: nowrap;
}

.category-item {
  position: relative;
  padding: 0.9rem 1.1rem;
  line-height: 1.8rem;
  cursor: pointer;
  white-space: nowrap;
}

.category-item-status {
  height: 0.8rem;
  width: 0.8rem;
  border-radius: 50%;
  border: none;
  background-color: white;
  display: inline-block;
}
.category-item-text {
  margin-left: 1rem;
  transition: opacity 0.6s ease;
  opacity: 1;
}

.category-item-number {
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
}

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

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

.side-bar.collapse .logo-name,
.side-bar.collapse .category-header,
.side-bar.collapse .chat-header,
.side-bar.collapse .chat-new-btn-text,
.side-bar.collapse .features-item-text,
.side-bar.collapse .inbox-number,
.side-bar.collapse .category-item-text,
.side-bar.collapse .category-item-number,
.side-bar.collapse .message-text,
.side-bar.collapse .chat-item-name,
.side-bar.collapse .chat-item-number,
.side-bar.collapse .chat-item-status {
  opacity: 0;
  pointer-events: none;
}

.side-bar.collapse .message-text {
  opacity: 0;
  pointer-events: none;
  transform: translateX(0);
}
.side-bar.collapse .message-icon {
  transform: translateX(0);
}
.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;
}