.site-header {
  position: fixed;
  z-index: var(--z-header);
  inset: 0 0 auto;
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  color: var(--white);
  transition: background-color 380ms var(--ease), color 380ms var(--ease), border-color 380ms var(--ease);
}

.site-header.is-solid,
.site-header.header-on-light {
  border-color: var(--line);
  background: rgba(246, 242, 233, 0.94);
  color: var(--ink);
  backdrop-filter: blur(1rem);
}

.site-header__inner {
  display: grid;
  width: min(calc(100% - clamp(1.5rem, 5vw, 6rem)), var(--container));
  height: 100%;
  margin-inline: auto;
  grid-template-columns: minmax(11rem, 1fr) auto minmax(11rem, 1fr);
  align-items: center;
  gap: 1rem;
}

.brand {
  justify-self: start;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.2vw, 2.35rem);
}

.site-nav a,
.header-action,
.lang-switch button,
.menu-button {
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-decoration: none;
  text-transform: uppercase;
}

.site-nav a {
  position: relative;
  padding-block: 0.6rem;
}

.site-nav a::after {
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  background: currentColor;
  transition: transform 260ms var(--ease);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-header__actions {
  display: flex;
  justify-self: end;
  align-items: center;
  gap: 1rem;
}

.lang-switch {
  display: flex;
  align-items: center;
}

.lang-switch button {
  padding: 0.4rem;
  opacity: 0.5;
}

.lang-switch button[aria-pressed="true"] {
  opacity: 1;
  text-decoration: underline;
  text-underline-offset: 0.3rem;
}

.header-action {
  padding: 0.55rem 0;
}

.menu-button {
  display: none;
  width: 2.65rem;
  height: 2.65rem;
  padding: 0;
}

.menu-button span,
.menu-button::before,
.menu-button::after {
  display: block;
  width: 1.4rem;
  height: 1px;
  margin: 0.3rem auto;
  content: "";
  background: currentColor;
  transition: transform 260ms var(--ease), opacity 260ms var(--ease);
}

.menu-button[aria-expanded="true"] span {
  opacity: 0;
}

.menu-button[aria-expanded="true"]::before {
  transform: translateY(0.38rem) rotate(45deg);
}

.menu-button[aria-expanded="true"]::after {
  transform: translateY(-0.38rem) rotate(-45deg);
}

.mobile-drawer {
  position: fixed;
  z-index: var(--z-drawer);
  inset: 0;
  display: grid;
  padding: calc(var(--header-h) + 2rem) clamp(1.5rem, 7vw, 4rem) 2rem;
  visibility: hidden;
  transform: translateX(100%);
  background: var(--graphite);
  color: var(--white);
  transition: transform 480ms var(--ease), visibility 480ms;
  align-content: space-between;
}

.mobile-drawer.is-open {
  visibility: visible;
  transform: translateX(0);
}

.mobile-drawer nav {
  display: grid;
  gap: 0.35rem;
}

.mobile-drawer nav a {
  padding-block: 0.25rem;
  font-family: var(--serif);
  font-size: clamp(2.3rem, 10vw, 4.5rem);
  line-height: 1.05;
  text-decoration: none;
}

.mobile-drawer__footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: rgba(255, 253, 248, 0.68);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.button,
.text-link {
  display: inline-flex;
  min-height: 3.2rem;
  align-items: center;
  justify-content: center;
  border: 1px solid currentColor;
  gap: 0.8rem;
  padding: 0.85rem 1.35rem;
  background: transparent;
  color: inherit;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color 220ms ease, color 220ms ease, border-color 220ms ease;
}

.button:hover {
  background: var(--ink);
  color: var(--white);
}

.button--light:hover {
  background: var(--white);
  color: var(--ink);
}

.button--solid {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--white);
}

.button--solid:hover {
  border-color: var(--gold);
  background: var(--gold);
}

.text-link {
  min-height: auto;
  padding: 0.3rem 0;
  border: 0;
  border-bottom: 1px solid currentColor;
}

.field {
  display: grid;
  gap: 0.48rem;
}

.field > span,
.field-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 3.2rem;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding: 0.8rem 0.1rem;
  background: transparent;
}

.field textarea {
  min-height: 8rem;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--gold);
  outline: none;
}

.form-message {
  min-height: 1.5rem;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.form-message[data-state="error"] {
  color: var(--danger);
}

.form-message[data-state="success"] {
  color: var(--success);
}

.site-footer {
  padding: var(--space-2xl) 0 var(--space-lg);
  background: var(--graphite);
  color: var(--white);
}

.site-footer__top {
  display: grid;
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--line-light);
  grid-template-columns: 1.3fr repeat(3, 0.7fr);
  gap: var(--space-lg);
}

.site-footer__brand {
  font-family: var(--serif);
  font-size: clamp(2.3rem, 4vw, 4.5rem);
  line-height: 0.95;
}

.site-footer h3 {
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-footer nav {
  display: grid;
  gap: 0.6rem;
}

.site-footer nav a {
  color: rgba(255, 253, 248, 0.72);
  font-size: 0.86rem;
  text-decoration: none;
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  padding-top: var(--space-lg);
  gap: 1rem;
  color: rgba(255, 253, 248, 0.55);
  font-size: 0.69rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 70rem) {
  .site-header__inner {
    grid-template-columns: 1fr auto;
  }

  .site-nav {
    display: none;
  }

  .menu-button {
    display: block;
  }
}

@media (max-width: 48rem) {
  .site-header__inner {
    width: calc(100% - 1.5rem);
  }

  .brand {
    font-size: 0.68rem;
    letter-spacing: 0.12em;
  }

  .header-action {
    white-space: nowrap;
  }

  .site-header__actions {
    gap: 0.45rem;
  }

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

  .site-footer__brand {
    grid-column: 1 / -1;
  }

  .site-footer__bottom {
    flex-direction: column;
  }
}

/* Home header: readable glass background on first viewport. */
body[data-page="home"] .site-header:not(.is-solid) {
  background: linear-gradient(180deg, rgba(22, 17, 12, 0.72) 0%, rgba(22, 17, 12, 0.56) 100%);
  border-bottom-color: rgba(255, 255, 255, 0.14);
  color: var(--white);
  -webkit-backdrop-filter: blur(10px) saturate(115%);
  backdrop-filter: blur(10px) saturate(115%);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.10);
}

/* Home header: navigation left, DNA mark centered, language/account right. */
body[data-page="home"] .site-header__inner {
  position: relative;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
}

body[data-page="home"] .site-nav--home {
  justify-self: start;
}

body[data-page="home"] .home-link {
  display: inline-flex;
  width: 1.55rem;
  height: 1.55rem;
  align-items: center;
  justify-content: center;
  padding: 0;
}

body[data-page="home"] .home-link svg {
  width: 1rem;
  height: 1rem;
  fill: currentColor;
}

body[data-page="home"] .home-link::after {
  display: none;
}

body[data-page="home"] .brand--signature {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translate(-50%, -50%);
  line-height: 1;
}

body[data-page="home"] .brand--signature .brand__mark {
  display: block;
  width: clamp(3rem, 4.3vw, 4.2rem);
  height: auto;
  object-fit: contain;
}

body[data-page="home"] .site-header__actions {
  grid-column: 3;
  justify-self: end;
}

@media (max-width: 70rem) {
  body[data-page="home"] .site-header__inner {
    grid-template-columns: 1fr auto 1fr;
  }

  body[data-page="home"] .site-nav--home {
    display: flex;
    gap: clamp(0.7rem, 1.6vw, 1.15rem);
  }

  body[data-page="home"] .site-nav--home a:not(.home-link) {
    display: none;
  }

  body[data-page="home"] .menu-button {
    display: block;
  }
}

@media (max-width: 48rem) {
  body[data-page="home"] .brand--signature .brand__mark {
    width: 2.65rem;
  }

  body[data-page="home"] .site-header__actions {
    gap: 0.35rem;
  }

  body[data-page="home"] .lang-switch button {
    padding-inline: 0.28rem;
  }

  body[data-page="home"] .header-action {
    font-size: 0.6rem;
  }
}