header {
  position: fixed;
  top: 0;
  z-index: 2;
  width: 100%;
  height: var(--header-height);
  display: flex;
  background-color: transparent;
  border-bottom: 1px solid #ededed;
  background-color: var(--color-secondary);
  transition: height 0.2s;
}

header nav {
  width: 100%;
  max-width: var(--max-width);
  height: 80px;
  margin: auto;
  padding-inline: var(--inline-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header nav a.logo {
  font-size: 0;
}

header nav a.logo img {
  width: 180px;
}

header nav .links {
  display: flex;
}

header nav .links a {
  position: relative;
  padding: 18px;
  font-size: var(--font-size-header);
  letter-spacing: 0.5px;
  text-decoration: none;
}

header nav .links a::after {
  content: "";
  position: absolute;
  bottom: 14px;
  left: 16px;
  width: calc(100% - 2 * 16px);
  height: 1px;
  background-color: var(--color-primary);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}

header nav .links a:hover::after,
header nav .links a.active::after {
  opacity: 1;
}

header nav .menu-btn-line {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  width: 100%;
  height: 80px;
  padding: 20px;
}

header nav .menu-btn {
  display: none;
  padding: 10px;
  justify-content: center;
  align-items: center;
  width: 50px;
  height: 50px;
  cursor: pointer;
  background-color: transparent;
}

header nav .menu-btn svg {
  stroke: var(--color-primary);
  stroke-width: 2px;
}

header nav #shadow {
  position: fixed;
  z-index: 1;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

header nav .menu {
  position: absolute;
  z-index: 1;
  top: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 0px;
  max-width: 100%;
  height: 100vh;
  padding-bottom: 80px;
  background-color: var(--color-secondary);
  overflow: auto;
  transition: width 0.2s;
}

header nav.open #shadow {
  opacity: 1;
  pointer-events: auto;
}

header nav.open .menu {
  width: 300px;
}

header nav .menu::-webkit-scrollbar {
  width: 16px;
}

header nav .menu::-webkit-scrollbar-thumb {
  background-color: #ededed;
  border-radius: 10px;
  border: 4px solid transparent;
  background-clip: content-box;
}

header nav .menu a {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 16px;
  text-decoration: none;
}

header nav .menu a div {
  margin: auto;
  position: relative;
  letter-spacing: 0.25px;
  white-space: nowrap;
  font-size: var(--font-size-text);
  width: max-content;
}

header nav .menu a div::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-primary);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}

header nav .menu a:hover div::after,
header nav .menu a:focus-visible div::after,
header nav .menu a.active div::after {
  opacity: 1;
}

@media screen and (max-width: 800px) {
  header nav .links {
    display: none;
  }
  header nav .menu-btn {
    display: flex;
  }
}