/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background var(--duration) var(--ease-soft),
    box-shadow var(--duration) var(--ease-soft),
    color var(--duration) var(--ease-soft);
  color: var(--color-white);
}

.site-header.is-scrolled,
.site-header.is-solid {
  background: rgba(251, 248, 244, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--color-line);
  color: var(--color-ink);
}

.site-header__inner {
  width: var(--container-wide);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-sm);
}

.logo {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1;
  justify-self: start;
}

.logo__mark {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.2vw, 1.9rem);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.logo__tag {
  margin-top: 0.35rem;
  font-size: 0.62rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  opacity: 0.78;
  font-weight: 400;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 2.5vw, 2.25rem);
  justify-self: center;
}

.nav a {
  font-size: var(--fs-small);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  position: relative;
  padding-block: 0.35rem;
  opacity: 0.88;
  transition: opacity 0.3s var(--ease-soft);
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease-out);
}

.nav a:hover,
.nav a.is-active {
  opacity: 1;
}

.nav a:hover::after,
.nav a.is-active::after {
  transform: scaleX(1);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  justify-self: end;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.lang-switch a {
  opacity: 0.55;
  transition: opacity 0.25s;
}

.lang-switch a.is-active,
.lang-switch a:hover {
  opacity: 1;
}

.lang-switch__sep {
  opacity: 0.35;
}

.menu-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  position: relative;
  z-index: 120;
  color: inherit;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 1.35rem;
  height: 1px;
  background: currentColor;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  transition: transform 0.35s var(--ease-out), opacity 0.25s;
}

.menu-toggle span {
  top: 50%;
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
}

.menu-toggle span::before {
  top: -7px;
}

.menu-toggle span::after {
  top: 7px;
}

.menu-toggle.is-open span {
  background: transparent;
}

.menu-toggle.is-open span::before {
  top: 0;
  transform: translateX(-50%) rotate(45deg);
}

.menu-toggle.is-open span::after {
  top: 0;
  transform: translateX(-50%) rotate(-45deg);
}

/* Footer */
.site-footer {
  background: var(--color-ink);
  color: rgba(251, 248, 244, 0.88);
  padding: var(--space-2xl) 0 var(--space-lg);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-xl);
}

.footer-brand .logo__mark {
  letter-spacing: 0.2em;
}

.footer-brand p {
  margin-top: var(--space-md);
  max-width: 28ch;
  color: rgba(251, 248, 244, 0.62);
  font-size: 0.95rem;
}

.footer-col h3 {
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-champagne);
  margin-bottom: var(--space-md);
  font-weight: 500;
}

.footer-col ul {
  display: grid;
  gap: 0.7rem;
}

.footer-col li,
.footer-col a {
  font-size: 0.95rem;
  color: rgba(251, 248, 244, 0.72);
}

.footer-bottom {
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(251, 248, 244, 0.12);
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
  flex-wrap: wrap;
  font-size: var(--fs-small);
  color: rgba(251, 248, 244, 0.45);
  letter-spacing: 0.06em;
}

/* WhatsApp float */
.whatsapp-float {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 120;
  width: 3.6rem;
  height: 3.6rem;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 12px 30px rgba(37, 211, 102, 0.35);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s;
}

.whatsapp-float:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 18px 36px rgba(37, 211, 102, 0.45);
}

.whatsapp-float svg {
  width: 1.7rem;
  height: 1.7rem;
  fill: currentColor;
}

@media (max-width: 980px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .site-header {
    z-index: 200;
  }

  .site-header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: min(100% - 1.5rem, var(--container-wide));
  }

  .logo {
    position: relative;
    z-index: 120;
  }

  .header-tools {
    position: relative;
    z-index: 120;
    gap: 0.75rem;
    margin-left: auto;
  }

  .nav,
  body > .nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 190;
    width: 100vw;
    max-width: 100vw;
    min-width: 100vw;
    height: 100vh;
    height: 100dvh;
    min-height: 100vh;
    min-height: 100dvh;
    margin: 0;
    padding: calc(var(--header-h) + 1.5rem) 1.5rem 2rem;
    box-sizing: border-box;
    background: var(--color-paper);
    color: var(--color-ink);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.75rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: none;
    transition: opacity 0.35s var(--ease-out), visibility 0.35s;
  }

  .nav.is-open,
  body > .nav.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-header.is-nav-open,
  .site-header.is-nav-open.is-scrolled,
  .site-header.is-nav-open.is-solid {
    background: var(--color-paper);
    color: var(--color-ink);
    box-shadow: none;
  }

  .menu-toggle.is-open {
    color: var(--color-ink);
  }

  .nav a {
    font-size: 1.05rem;
    letter-spacing: 0.2em;
  }

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

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}