.header {
  background: var(--header-color);
  padding: 1rem 0;
  position: fixed;
  top: 0px;
  left: 0px;
  width: 100%;
  z-index: 1000;
}

.header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--gap-size);
}

.logo {
  font-size: var(--title-size);
  font-weight: bold;
  margin-right: 2rem;
}

.nav ul {
  display: flex;
  position: relative;
  align-items: center;
  list-style: none;
  gap: var(--gap);
  margin-bottom: 1rem;
}

.nav a {
  padding-bottom: 0.5rem;
  position: relative;
}

.nav a.active {
  color: var(--accent-color);
}

.nav a.active::after {
  content: '';
  display: block;
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 0.2rem;
  border-radius: 1rem;
  background: var(--accent-color);
  color: var(--accent-color);
}

.header .links {
  margin-left: 1rem;
}

.header-indent {
  height: 4rem;
}