.profile-cover {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    #0d7a6b 40%,
    #1a5276 100%
  );
}
.dark .profile-cover {
  background: linear-gradient(
    135deg,
    #064e3b 0%,
    #0d4d4a 40%,
    #0f2942 100%
  );
}

.skill-bar-track {
  background-color: var(--color-border);
  border-radius: 999px;
  height: 6px;
  overflow: hidden;
}
.skill-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    var(--color-primary),
    var(--color-primary-strong)
  );
  transition: width 1s ease;
}

.activity-line::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 28px;
  bottom: -8px;
  width: 1px;
  background: var(--color-border-subtle);
}
.activity-line:last-child::before {
  display: none;
}

.tab-btn {
  position: relative;
  padding: 0.625rem 1rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-muted);
  border-bottom: 2px solid transparent;
  transition: color 150ms, border-color 150ms;
  white-space: nowrap;
  flex-shrink: 0;
}
.tab-btn:hover {
  color: var(--color-heading);
}
.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-panel {
  display: none;
}
.tab-panel.active {
  display: block;
}