/* Site header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-surface-container-lowest);
  border-bottom: 1px solid var(--color-border-subtle);
}

.utility-bar {
  background-color: var(--color-surface-container);
  border-bottom: 1px solid var(--color-border-subtle);
  min-height: var(--utility-bar-height);
}

.utility-bar__inner {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: var(--utility-bar-height);
  gap: 8px;
}

.utility-bar__link {
  font: var(--text-label-md);
  color: var(--color-on-surface-variant);
  text-decoration: none;
  padding: 8px 12px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.utility-bar__link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.utility-bar__separator {
  color: var(--color-outline-variant);
  user-select: none;
}

.main-header {
  min-height: var(--header-height);
}

.main-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: var(--header-height);
  padding-block: 12px;
}

.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo:hover {
  text-decoration: none;
  opacity: 0.9;
}

.site-logo__img {
  height: 56px;
  width: auto;
  object-fit: contain;
}

@media (max-width: 767px) {
  .site-logo__img {
    height: 44px;
  }
}

/* Main navigation */
.main-nav {
  display: flex;
  justify-content: center;
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav__link {
  font: 600 0.9375rem/1.25rem var(--font-body);
  color: var(--color-on-tertiary-fixed);
  text-decoration: none;
  padding: 10px 16px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-default);
}

.main-nav__link:hover,
.main-nav__link--active {
  background-color: var(--color-surface-container-low);
  color: var(--color-primary);
  text-decoration: none;
}

.main-nav__link--active {
  font-weight: 700;
}

/* Header search */
.header-search {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-search__form {
  display: flex;
  align-items: center;
  gap: 4px;
}

.header-search__input {
  width: 200px;
  min-height: 44px;
  padding: 8px 12px;
  font: var(--text-body-md);
  border: 1px solid rgba(28, 37, 38, 0.2);
  border-radius: var(--radius-default);
  background: var(--color-surface-container-lowest);
}

.header-search__input:focus {
  width: 260px;
  border-color: var(--color-primary);
}

.header-search__submit {
  min-width: 44px;
  min-height: 44px;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-default);
  color: var(--color-on-surface);
  cursor: pointer;
}

.menu-toggle__icon {
  width: 24px;
  height: 24px;
}

@media (max-width: 1023px) {
  .main-header__inner {
    grid-template-columns: auto 1fr auto;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface-container-lowest);
    border-bottom: 1px solid var(--color-border-subtle);
    box-shadow: var(--shadow-ambient);
    padding: 16px var(--gutter);
  }

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

  .main-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .main-nav__link {
    width: 100%;
    padding: 14px 16px;
  }

  .header-search__input {
    width: 0;
    padding: 0;
    border: none;
    opacity: 0;
    pointer-events: none;
  }

  .header-search__input.is-visible {
    width: 160px;
    padding: 8px 12px;
    border: 1px solid rgba(28, 37, 38, 0.2);
    opacity: 1;
    pointer-events: auto;
  }

  .main-header {
    position: relative;
  }
}

@media (max-width: 767px) {
  .utility-bar__separator {
    display: none;
  }

  .utility-bar__inner {
    justify-content: center;
    flex-wrap: wrap;
  }
}

/* Hero */
.hero {
  background: linear-gradient(
    180deg,
    var(--color-surface-container-lowest) 0%,
    var(--color-surface) 100%
  );
  padding-block: clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--color-border-subtle);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero__content {
  max-width: 560px;
}

.hero__eyebrow {
  font: var(--text-label-md);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: 16px;
}

.hero__title {
  margin-bottom: 20px;
  color: var(--color-on-tertiary-fixed);
}

.hero__desc {
  font: var(--text-body-lg);
  color: var(--color-on-surface-variant);
  margin-bottom: 32px;
}

.hero__search {
  max-width: 480px;
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__mark {
  width: min(280px, 100%);
  opacity: 0.9;
}

@media (max-width: 1023px) {
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__content {
    max-width: none;
    margin-inline: auto;
  }

  .hero__search {
    margin-inline: auto;
  }

  .hero__visual {
    order: -1;
  }

  .hero__mark {
    width: 180px;
  }
}

/* Quick access grid */
.quick-access {
  padding-block: clamp(3rem, 6vw, 5rem);
}

.quick-access__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.quick-access__card {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-height: 100%;
}

.quick-access__card:hover {
  text-decoration: none;
}

.quick-access__card:hover .card__title {
  color: var(--color-primary);
}

@media (max-width: 1199px) {
  .quick-access__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Valves section */
.valves-section {
  background-color: var(--color-surface-container-low);
}

.valves-section__layout {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  align-items: start;
}

.valves-section__intro h2 {
  margin-bottom: 16px;
}

.valves-section__intro p {
  color: var(--color-on-surface-variant);
  margin-bottom: 24px;
}

.valves-panel {
  background: var(--color-surface-container-lowest);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
}

@media (max-width: 1023px) {
  .valves-section__layout {
    grid-template-columns: 1fr;
  }
}

/* News grid */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.news-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.news-card .card {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 28px;
}

.news-card .card__title {
  font: 600 1.125rem/1.5rem var(--font-display);
  flex: 1;
}

.news-card .card__footer {
  margin-top: auto;
  padding-top: 16px;
}

@media (max-width: 1199px) {
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .quick-access__grid.scroll-row,
  .news-grid.scroll-row {
    display: flex;
    grid-template-columns: unset;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: var(--gutter);
    gap: 16px;
    margin-inline: calc(-1 * var(--gutter));
    padding-inline: var(--gutter);
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
  }

  .scroll-row > .quick-access__card,
  .scroll-row > .news-card {
    flex: 0 0 68%;
    scroll-snap-align: start;
    scroll-margin-inline: var(--gutter);
  }

  .scroll-row > .quick-access__card .card,
  .scroll-row > .news-card .card {
    height: 100%;
  }

  .quick-access__card .card {
    padding: 24px;
  }
}

@media (max-width: 767px) and (prefers-reduced-motion: reduce) {
  .quick-access__grid.scroll-row,
  .news-grid.scroll-row {
    scroll-snap-type: none;
  }
}


/* Footer */
.site-footer {
  background-color: var(--color-inverse-surface);
  color: var(--color-inverse-on-surface);
  padding-block: 64px 32px;
}

.site-footer a {
  color: var(--color-inverse-on-surface);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-inverse-primary);
  text-decoration: underline;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand__logo {
  height: 48px;
  width: auto;
  margin-bottom: 16px;
  filter: brightness(0) invert(1);
  opacity: 0.95;
}

.footer-brand__desc {
  font: var(--text-body-md);
  color: rgba(233, 243, 243, 0.8);
  max-width: 32ch;
}

.footer-col__title {
  font: var(--text-label-md);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-inverse-on-surface);
  margin-bottom: 16px;
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col__link {
  font: var(--text-body-md);
  padding: 4px 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(233, 243, 243, 0.15);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-bottom__legal {
  font: var(--text-body-md);
  color: rgba(233, 243, 243, 0.7);
}

.footer-bottom__links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

@media (max-width: 1023px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}