/* Global navbar */

:root {
  --navbar-fade-duration: 950ms;
  --navbar-fade-easing: ease-in-out;
}

/* A transform on body makes fixed descendants scroll with the document.
   Keep the global page fade, without translating the body. */
body {
  animation: sitePageFade .28s ease backwards;
  transition: opacity .28s ease;
}

body.site-page-leaving {
  transform: none;
}

@keyframes sitePageFade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 100%;
  height: 76px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(var(--shadow-rgb), .08);
  background: rgba(var(--bg-rgb), .8);
  backdrop-filter: blur(18px) saturate(135%);
  -webkit-backdrop-filter: blur(18px) saturate(135%);
  box-shadow: 0 8px 30px rgba(var(--shadow-rgb), .035);
  transition:
    opacity var(--navbar-fade-duration) var(--navbar-fade-easing),
    transform var(--navbar-fade-duration) var(--navbar-fade-easing),
    background .35s ease,
    border-color .35s ease;
}

.site-header.is-hidden {
  transform: translate3d(0, -10px, 0);
  opacity: 0;
  pointer-events: none;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-weight: 700;
  letter-spacing: -.04em;
  font-size: 19px;
}

.logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 28px;
  color: var(--text-soft);
  font-size: 13px;
}

.nav-links a {
  position: relative;
  transition: color .25s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 1px;
  background: var(--accent);
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left center;
  transition:
    opacity .2s ease,
    transform .32s cubic-bezier(.2, .75, .2, 1);
}

.nav-links a:hover,
.nav-links a[aria-current] {
  color: var(--text);
}

.nav-links a[aria-current]::after {
  opacity: 1;
  transform: scaleX(1);
}

.contact-btn {
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 9px 17px;
  font-size: 12px;
}

.contact-btn:hover {
  background: var(--accent);
  color: var(--accent-contrast);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.language-switch {
  display: flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
}

.language-switch button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 10px;
  font-weight: 600;
  line-height: 1;
  min-width: 30px;
  min-height: 30px;
  padding: 8px 6px;
  cursor: pointer;
  transition: background-color .25s ease, color .25s ease;
}

.language-switch button[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-contrast);
}

@media (hover: hover) {
  .language-switch button:not([aria-pressed="true"]):hover {
    background: rgba(var(--accent-rgb), .1);
    color: var(--accent);
  }
}

.language-switch button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Dark variation — Trayectoria */

.trajectory-nav {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 100%;
  height: 76px;
  border-bottom: 1px solid var(--on-dark-line);
  background: rgba(var(--night-rgb), .8);
  color: var(--trajectory-text);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  transition:
    opacity var(--navbar-fade-duration) var(--navbar-fade-easing),
    transform var(--navbar-fade-duration) var(--navbar-fade-easing),
    background .35s ease,
    border-color .35s ease;
}

.trajectory-nav.is-hidden {
  transform: translate3d(0, -10px, 0);
  opacity: 0;
  pointer-events: none;
}

.trajectory-nav .nav-links {
  color: var(--on-dark-muted);
}

.trajectory-nav .nav-links a:hover,
.trajectory-nav .nav-links a[aria-current] {
  color: var(--trajectory-text);
}

.trajectory-nav .contact-btn {
  border-color: rgba(var(--accent-rgb), .5);
}

.trajectory-nav .contact-btn:hover {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-contrast);
}

.trajectory-nav .language-switch {
  border-color: rgba(var(--accent-rgb), .3);
}

.trajectory-nav .language-switch button {
  color: var(--on-dark-muted);
}

.trajectory-nav .language-switch button[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-contrast);
}

@media (hover: hover) {
  .trajectory-nav .language-switch button:not([aria-pressed="true"]):hover {
    background: rgba(var(--accent-rgb), .14);
    color: var(--accent);
  }
}

.menu-toggle,
.mobile-menu-footer { display: none; }

@media (max-width: 1000px) {
  .site-header {
    height: 76px;
    padding: 0;
  }
  .site-header.is-hidden {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }
  .nav {
    width: calc(100% - 32px);
    gap: 8px;
  }
  .logo { font-size: clamp(16px, 4.5vw, 19px); white-space: nowrap; }
  .nav-actions { gap: 6px; }
  .menu-toggle {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: inherit;
    cursor: pointer;
  }
  .menu-toggle svg { width: 24px; height: 24px; }
  .menu-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
  .menu-toggle[aria-expanded="true"] { background: rgba(var(--accent-rgb), .08); }
  .nav-links {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    height: calc(100vh - 76px);
    height: calc(100dvh - 76px);
    padding: 24px 24px max(32px, env(safe-area-inset-bottom));
    box-sizing: border-box;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    background: var(--bg);
    color: var(--text);
    flex-direction: column;
    gap: 0;
  }
  .trajectory-nav .nav-links { background: var(--night); color: var(--trajectory-text); }
  .site-header.is-menu-open .nav-links { display: flex; }
  .nav-links > a {
    flex-shrink: 0;
    padding: 24px 0;
    font-size: clamp(27px, 7vw, 38px);
    letter-spacing: -.035em;
    line-height: 1.15;
    border-bottom: 1px solid var(--line-strong);
  }
  .nav-links > a[data-nav-key="home"] { display: none; }
  .nav-links a::after { display: none; }
  .nav-links > a[aria-current] { font-weight: 600; }
  .mobile-menu-footer {
    display: block;
    margin-top: auto;
    padding-top: 40px;
    flex-shrink: 0;
  }
  .site-header .mobile-menu-footer .contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 14px 22px;
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  body {
    animation: none;
    transition: none;
  }

  .site-header,
  .trajectory-nav {
    transform: none;
    transition: opacity 180ms linear;
  }

  .site-header.is-hidden,
  .trajectory-nav.is-hidden {
    transform: none;
  }

  .nav-links a,
  .nav-links a::after,
  .language-switch button {
    transition: none;
  }
}