.container {
  max-width: 1440px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
}

.site-header-inner {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2rem var(--container-padding);
}

.site-header .nav-list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-header .nav-list a {
  position: relative;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-l1);
  padding: 0.25rem 0;
}

.site-header .nav-list a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1.5px;
  background: var(--text-l0);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 220ms ease;
}

.site-header .nav-list a:hover::after,
.site-header .nav-list a.active::after {
  transform: scaleX(1);
}

.burger {
  display: none;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  z-index: 110;
}

.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-l0);
  position: relative;
  transition: transform 220ms ease, opacity 220ms ease;
}

.burger span::before,
.burger span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--text-l0);
  transition: transform 220ms ease;
}

.burger span::before { top: -7px; }
.burger span::after { top: 7px; }

.burger.open span {
  background: transparent;
}

.burger.open span::before {
  transform: translateY(7px) rotate(45deg);
}

.burger.open span::after {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1024px) {
  :root {
    --container-padding: 3rem;
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 1.25rem;
    --header-offset: 4.5rem;
  }

  .site-header-inner {
    padding: 1rem var(--container-padding);
  }

  .burger {
    display: flex;
  }

  .site-header .nav-list {
    position: fixed;
    inset: 0;
    background: var(--bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform 280ms ease;
    z-index: 105;
  }

  .site-header .nav-list.open {
    transform: translateX(0);
  }

  .site-header .nav-list a {
    font-size: 1.5rem;
  }
}