.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container--narrow {
  max-width: var(--content-max);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  min-height: var(--header-height);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: var(--space-3);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
}

.site-logo:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.site-logo__icon {
  width: 2rem;
  height: 2rem;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 700;
}

.site-nav {
  display: none;
}

.site-nav__list {
  display: flex;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  text-decoration: none;
}

.site-nav__link:hover,
.site-nav__link--active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  text-decoration: none;
}

.site-nav__item--menu {
  position: relative;
}

.site-nav__dropdown {
  display: none;
  position: absolute;
  top: calc(100% - 0.25rem);
  left: 0;
  z-index: 20;
  min-width: 11rem;
  margin: 0;
  padding: var(--space-2);
  list-style: none;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.site-nav__item--menu:hover .site-nav__dropdown,
.site-nav__item--menu:focus-within .site-nav__dropdown {
  display: block;
}

.site-nav__dropdown-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text);
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.site-nav__dropdown-link:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
  text-decoration: none;
}

.header-search {
  display: none;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
}

.header-search__input {
  width: 9.5rem;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font: inherit;
  font-size: var(--text-sm);
  background: var(--color-bg);
  color: var(--color-text);
}

.header-search__input:focus {
  outline: 2px solid var(--color-primary-light);
  border-color: var(--color-primary);
}

.header-search__btn {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #fff;
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
}

.mobile-nav .header-search {
  display: flex;
  margin-bottom: var(--space-3);
}

.mobile-nav .header-search__input {
  flex: 1;
  width: auto;
}

.mobile-nav__link--sub {
  padding-left: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 1.25rem;
  height: 2px;
  background: var(--color-text);
  position: relative;
}

.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-text);
}

.nav-toggle__bar::before { top: -6px; }
.nav-toggle__bar::after { top: 6px; }

.mobile-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4);
  box-shadow: var(--shadow-md);
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav__link {
  display: block;
  padding: var(--space-3);
  color: var(--color-text);
  font-weight: 500;
  border-radius: var(--radius-md);
  text-decoration: none;
}

.mobile-nav__link:hover {
  background: var(--color-bg-alt);
  text-decoration: none;
}

.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0 var(--space-8);
  margin-top: var(--space-16);
}

.site-footer__grid {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.site-footer__title {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.site-footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__links li {
  margin-bottom: var(--space-2);
}

.site-footer__links a {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-decoration: none;
}

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

.site-footer__bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.page-header {
  padding: var(--space-10) 0 var(--space-8);
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

.page-header__title {
  margin-bottom: var(--space-3);
}

.page-header__desc {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 40rem;
  margin: 0;
}

.section {
  padding: var(--space-12) 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section__header {
  margin-bottom: var(--space-8);
}

.section__title {
  margin-bottom: var(--space-2);
}

.section__desc {
  color: var(--color-text-muted);
  margin: 0;
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .site-nav { display: block; }
  .nav-toggle { display: none; }
  .mobile-nav { display: none !important; }
  .site-header__inner > .header-search { display: flex; }
  .site-nav__item--wide { display: none; }

  .site-footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .site-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

@media (min-width: 1100px) {
  .site-nav__item--wide { display: list-item; }
}

@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}