/* Header, footer, grids */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-line);
  box-shadow: 0 6px 24px rgba(11, 18, 32, 0.04);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-h);
}

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

.brand img,
.brand svg {
  height: 40px;
  width: auto;
}

.site-header .brand img,
.site-header .brand svg {
  height: 42px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__links a {
  color: var(--color-ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.2s var(--ease);
}

.nav__links a:hover,
.nav__links a[aria-current="page"] {
  color: var(--color-accent-deep);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-line);
  border-radius: 12px;
  background: var(--color-bg);
  cursor: pointer;
  padding: 0;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  position: relative;
  transition: transform 0.25s var(--ease), opacity 0.2s;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bars::before {
  top: -6px;
}

.nav-toggle__bars::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  top: 0;
  transform: rotate(-45deg);
}

.site-footer {
  background: var(--color-ink);
  color: rgba(255, 255, 255, 0.72);
  padding: 4rem 0 1.75rem;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
}

.site-footer a:hover {
  color: #fff;
}

.site-footer .brand img,
.site-footer .brand svg {
  height: 36px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand p {
  margin-top: 1rem;
  color: rgba(255, 255, 255, 0.62);
  max-width: 18rem;
  font-size: 0.95rem;
}

.footer-col h3 {
  color: #fff;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.footer-col p,
.footer-address {
  margin: 0;
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.55;
}

.footer-address {
  margin-top: 0.85rem;
}

.footer-bottom {
  padding-top: 1.5rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.45);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

@media (max-width: 960px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

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

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

@media (max-width: 800px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    padding: 1.25rem 1.25rem 1.5rem;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--color-line);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s var(--ease), opacity 0.3s var(--ease), visibility 0.3s;
  }

  .nav.is-open {
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .nav__links {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }

  .nav__links a {
    display: block;
    padding: 0.85rem 0.5rem;
  }

  .nav .btn {
    width: 100%;
    justify-content: center;
  }

  body.nav-open {
    overflow: hidden;
  }
}

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}