.page-container {
  margin-inline: auto;
  max-width: 1200px;
  padding-inline: var(--space-4);
  width: 100%;
}

.site-header {
  background: var(--color-neutral-50);
  border-bottom: 1px solid var(--color-border-default);
  height: 72px;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.site-header__inner {
  align-items: center;
  display: flex;
  gap: var(--space-4);
  height: 100%;
  justify-content: space-between;
}

.site-header__left {
  align-items: center;
  display: flex;
  gap: var(--space-3);
}

.site-brand {
  color: var(--color-neutral-900);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
}

.site-brand:hover {
  color: var(--color-primary-600);
}

.site-menu-toggle {
  align-items: center;
  background: var(--color-neutral-100);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-full);
  color: var(--color-neutral-700);
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  height: 44px;
  justify-content: center;
  padding: 0;
  width: 44px;
}

.site-menu-toggle:hover {
  border-color: var(--color-primary-300);
}

.site-menu-toggle:focus-visible {
  outline: 2px solid var(--color-primary-400);
  outline-offset: 2px;
}

.site-menu-toggle__line {
  background: currentColor;
  border-radius: var(--radius-full);
  display: block;
  height: 2px;
  width: 18px;
}

.site-nav {
  background: var(--color-neutral-50);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  box-shadow: var(--shadow-xl);
  bottom: 0;
  left: 0;
  padding: var(--space-6) var(--space-4);
  position: fixed;
  transform: translateY(110%);
  transition: transform var(--duration-normal) var(--ease-default);
  width: 100%;
  z-index: var(--z-dropdown);
}

.site-nav__list {
  display: grid;
  gap: var(--space-3);
}

.site-nav__link {
  align-items: center;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--color-neutral-600);
  display: inline-flex;
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-base);
  min-height: 44px;
  padding: 0 var(--space-3);
  position: relative;
  text-decoration: none;
}

.site-nav__link:hover {
  color: var(--color-primary-600);
}

.site-nav__link:focus-visible {
  outline: 2px solid var(--color-primary-400);
  outline-offset: 2px;
}

.site-nav__link::after {
  background: var(--color-primary-400);
  bottom: 0;
  content: "";
  height: 2px;
  left: var(--space-3);
  opacity: 0;
  position: absolute;
  right: var(--space-3);
  transform: scaleX(0.7);
  transform-origin: center;
  transition: opacity var(--duration-fast) var(--ease-default),
    transform var(--duration-fast) var(--ease-default);
}

.site-nav__link.is-active,
.site-nav__link[aria-current="page"] {
  background: var(--color-primary-50);
  border-color: var(--color-primary-100);
  color: var(--color-primary-600);
}

.site-nav__link.is-active::after,
.site-nav__link[aria-current="page"]::after {
  opacity: 1;
  transform: scaleX(1);
}

.site-header__right {
  align-items: center;
  display: inline-flex;
}

.site-user-menu {
  align-items: center;
  background: var(--color-neutral-100);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-full);
  color: var(--color-neutral-700);
  display: inline-flex;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-1) var(--space-2) var(--space-1) var(--space-1);
}

.site-user-menu:hover {
  border-color: var(--color-primary-300);
}

.site-user-menu:focus-visible {
  outline: 2px solid var(--color-primary-400);
  outline-offset: 2px;
}

.site-user-menu__avatar {
  align-items: center;
  background: var(--color-secondary-400);
  border-radius: var(--radius-full);
  color: var(--color-neutral-50);
  display: inline-flex;
  font-size: var(--text-sm);
  height: 32px;
  justify-content: center;
  width: 32px;
}

.site-user-menu__caret {
  color: var(--color-neutral-500);
  font-size: var(--text-xs);
}

.site-nav-backdrop {
  background: rgba(23, 21, 18, 0.6);
  border: 0;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  position: fixed;
  transition: opacity var(--duration-normal) var(--ease-default);
  z-index: 150;
}

body.is-menu-open {
  overflow: hidden;
}

body.is-menu-open .site-nav {
  transform: translateY(0);
}

body.is-menu-open .site-nav-backdrop {
  opacity: 1;
  pointer-events: auto;
}

.site-main {
  min-height: calc(100vh - 72px - 96px);
  padding-block: var(--space-10);
}

.site-main .btn {
  width: 100%;
}

.site-footer {
  background: var(--color-neutral-100);
  border-top: 1px solid var(--color-border-default);
  color: var(--color-neutral-600);
  padding-block: var(--space-6);
}

.site-footer__inner {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
}

.site-footer__links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.site-footer a {
  color: var(--color-neutral-600);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-primary-600);
}

.layout-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.layout-grid > * {
  min-width: 0;
}

@media (min-width: 768px) {
  .page-container {
    padding-inline: var(--space-6);
  }

  .site-header__inner {
    display: grid;
    gap: var(--space-6);
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .site-menu-toggle,
  .site-nav-backdrop {
    display: none;
  }

  .site-nav {
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    display: flex;
    justify-content: flex-start;
    padding: 0;
    position: static;
    transform: none;
    width: auto;
  }

  .site-nav__list {
    align-items: center;
    display: flex;
    gap: var(--space-3);
  }

  .site-nav__link {
    border: 0;
    border-radius: 0;
    padding-inline: var(--space-2);
  }

  .site-nav__link.is-active,
  .site-nav__link[aria-current="page"] {
    background: transparent;
    border-color: transparent;
  }

  .site-main .btn {
    width: auto;
  }

  .layout-grid {
    gap: var(--space-6);
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-container {
    padding-inline: var(--space-8);
  }

  .site-nav__list {
    gap: var(--space-4);
  }

  .layout-grid {
    gap: var(--space-6);
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .page-container {
    padding-inline: var(--space-8);
  }
}