.dashboard-header {
  grid-area: header;
  display: flex;
  align-items: center;
  gap: var(--length-md1);
  padding: var(--length-sm2) 0;
}

.dashboard-header img {
  height: 40px;
  width: auto;
}

.dashboard-header h1 {
  font-size: var(--length-md2);
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.container {
  padding: var(--length-md1);
  display: grid;
  grid-gap: var(--length-md1);
  grid-template-columns: repeat(2, 1fr);
  grid-template-areas:
    "header header"
    "headline1 headline2"
    "list list"
    "growth growth"
    "engagement engagement"
    "regions regions"
    "network collaborators"
    "activity activity";
}

@media only screen and (min-width: 600px) {
  .container {
    grid-template-areas:
      "header header"
      "headline1 headline2"
      "list list"
      "growth growth"
      "engagement regions"
      "network collaborators"
      "activity activity";
  }
}

@media only screen and (min-width: 800px) {
  .container {
    grid-template-columns: repeat(4, 1fr);
    grid-template-areas:
      "header header header header"
      "headline1 headline2 list list"
      "engagement growth growth regions"
      "network network collaborators collaborators"
      "activity activity activity activity";
    width: 800px;
    margin: 0 auto;
  }
}

@keyframes hide {
  0%, 50% { opacity: 1; visibility: visible; }
  100% { opacity: 0; visibility: hidden; }
}

.preloader {
  position: fixed;
  z-index: 2;
  top: 0;
  left: 0;
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  background: var(--color-background);
  opacity: 0; 
  visibility: hidden;
  animation: hide 1s linear;
}

@keyframes spin {
  100% { transform: rotate(360deg); }
}

.spinner {
  width: var(--length-xl1);
  height: var(--length-xl1);
  border-radius: 50%;
  border: var(--length-sm2) solid var(--color-default);
  border-top-color: var(--color-primary);
  animation: spin 1s infinite linear;
}

.sidebar {
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  display: none;
  flex-direction: column;
  align-items: stretch;
  justify-content: space-between;
  width: var(--length-lg2);
  height: 100%;
  background: var(--color-card);
}

.sidebar .uil {
  font-size: var(--length-md3);
  cursor: pointer;
}

@media only screen and (min-width: 800px) {
  .sidebar {
    display: flex;
  }
}

.sidebar-top,
.sidebar-bottom {
  display: grid;
  place-items: center;
  height: var(--length-lg3);
}

.collaborator-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.collaborator-item {
  display: flex;
  align-items: center;
  gap: var(--length-md1);
  padding: var(--length-md1) 0;
  border-bottom: 1px solid var(--color-border);
}

.collaborator-item:last-child {
  border-bottom: none;
}

.collaborator-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.collaborator-info {
  flex: 1;
}

.collaborator-name {
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 var(--length-sm1);
}

.collaborator-title {
  font-size: 0.9em;
  color: var(--color-text-light);
  margin: 0 0 var(--length-sm1);
}

.collaborator-affiliation {
  font-size: 0.85em;
  color: var(--color-text-lighter);
  margin: 0;
}