/* Sticky site header and navigation. */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(97% 0.018 85 / 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 2px solid transparent;
  transition:
    border-color var(--duration-normal) var(--ease-out-expo),
    box-shadow var(--duration-normal) var(--ease-out-expo),
    background var(--duration-normal) var(--ease-out-expo);
}

.site-header.is-scrolled {
  border-bottom-color: var(--c-ink);
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-block: 0.85rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
  color: var(--c-ink);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  background: var(--c-rosa);
  color: var(--c-cream);
  border: 2px solid var(--c-ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 2px 2px 0 var(--c-ink);
}

.brand-name b {
  font-weight: 600;
}

.brand-name span {
  color: var(--c-rosa-deep);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.6rem, 1.5vw, 1.6rem);
  list-style: none;
  padding: 0;
}

.nav-links a {
  position: relative;
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  padding: 0.4rem 0.2rem;
  color: var(--c-ink-soft);
  transition: color var(--duration-fast) var(--ease-out-expo);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 3px;
  background: var(--c-rosa);
  border-radius: 3px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.nav-links a:hover,
.nav-links a.is-current {
  color: var(--c-ink);
}

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

/* Keep links, lang switcher, and CTA on one row on desktop. */
.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-cta {
  flex-shrink: 0;
}

.nav-cta .btn {
  padding: 0.6rem 1.2rem;
  font-size: var(--text-sm);
  box-shadow: 3px 3px 0 var(--c-ink);
}

/* Language switcher: a segmented pill that sits quietly between nav links and CTA. */
.lang-switcher {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  background: var(--c-cream-deep);
  border: 1.5px solid oklch(43% 0.035 50 / 0.45);
  border-radius: var(--radius-pill);
  padding: 0.18rem;
  gap: 0.18rem;
}

.lang-btn {
  padding: 0.28rem 0.65rem;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  background: transparent;
  color: var(--c-ink-soft);
  border: none;
  border-radius: var(--radius-pill);
  transition:
    background var(--duration-fast) var(--ease-out-expo),
    color var(--duration-fast) var(--ease-out-expo);
}

.lang-btn.is-active {
  background: var(--c-talavera);
  color: var(--c-cream);
}

.lang-btn:hover:not(.is-active) {
  background: var(--c-cream);
  color: var(--c-ink);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 2.8rem;
  height: 2.8rem;
  padding: 0.6rem;
  background: var(--c-sunflower);
  border: 2px solid var(--c-ink);
  border-radius: var(--radius-sm);
  box-shadow: 2px 2px 0 var(--c-ink);
}

.nav-toggle span {
  display: block;
  height: 2.5px;
  background: var(--c-ink);
  border-radius: 2px;
  transition: transform var(--duration-fast) var(--ease-out-expo),
    opacity var(--duration-fast) var(--ease-out-expo);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(82vw, 22rem);
    clip-path: inset(0 0 0 100%);
    visibility: hidden;
    pointer-events: none;
    transition:
      clip-path var(--duration-normal) var(--ease-out-expo),
      visibility 0s linear var(--duration-normal);
    background: var(--c-cream-deep);
    border-left: 5px solid var(--c-rosa);
    box-shadow: var(--shadow-lg);
    padding: 6rem 2rem 2rem;
    flex-direction: column;
    gap: 1.6rem;
    overflow-y: auto;
  }

  .primary-nav.is-open {
    clip-path: inset(0 0 0 0);
    visibility: visible;
    pointer-events: auto;
    transition: clip-path var(--duration-normal) var(--ease-out-expo);
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.2rem;
  }

  .nav-links a {
    font-size: var(--text-xl);
    font-family: var(--font-display);
  }

  .lang-switcher {
    align-self: flex-start;
  }

  .nav-cta {
    width: 100%;
  }

  .nav-cta .btn {
    width: 100%;
    font-size: var(--text-base);
    padding: 0.85rem 1.2rem;
  }
}