/*
  nav.css
  Logo guide (KOM_Consulting_Logo_Guide / identity page):
  - White lockup on dark surfaces, black lockup on light. Never recolour the PNG.
  - Header lockup is 84px wide so the bar stays a thin horizontal strip.
    Height is auto so the artwork is not stretched. The footer lockup stays larger.

  WCAG 2.5.8 Target Size: theme and language controls use a 44px hit area
  even though the drawn pills are smaller.
  WCAG 2.4.11 / 1.4.10: the bar wraps instead of forcing horizontal scroll.
*/

.site-header {
  position: fixed;
  top: 1.25rem;
  left: 0;
  right: 0;
  z-index: 20;
  width: 100%;
}

/*
  Full-width strip, same span as the footer. Solid fill so labels stay
  readable when the page scrolls underneath (1.4.3). No blur, border, or pill.
*/
.nav-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem 1.25rem;
  width: 100%;
  padding: 0.45rem var(--shell-inset);
  background: var(--bg);
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.brand {
  display: flex;
  align-items: center;
  flex: none;
  padding: 0.15rem 0.5rem 0.15rem 0;
}

.brand img {
  width: 84px;
  height: auto;
}

[data-theme="dark"] .logo-on-light,
[data-theme="light"] .logo-on-dark {
  display: none;
}

.nav-links {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.35rem;
}

.nav-links a {
  font-weight: 500;
  font-size: 1rem;
  color: var(--text-soft);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-md);
  white-space: nowrap;
}

.nav-links a[aria-current="page"] {
  background: var(--bg-elevated);
  color: var(--text);
}

/*
  Page-centering the links puts About on top of the language control from
  1681px up. They stay in the row until there is a clear gap, which is
  wider for Spanish and Portuguese. Narrower layouts are unchanged.
*/
@media (max-width: 1880px) {
  .nav-links {
    position: static;
    left: auto;
    top: auto;
    transform: none;
    flex: 1;
    gap: 1rem;
  }
}

@media (min-width: 1321px) and (max-width: 2000px) {
  html[data-lang="es"] .nav-links,
  html[data-lang="pt"] .nav-links {
    position: static;
    left: auto;
    top: auto;
    transform: none;
    flex: 1;
    gap: 1rem;
  }
}

.nav-links a[aria-current="page"],
.nav-links a[data-emphasis="true"] {
  font-weight: 700;
  color: var(--text);
}

.nav-links a:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--white) 12%, transparent);
}

[data-theme="light"] .nav-links a:hover {
  background: color-mix(in srgb, var(--dark-500) 6%, transparent);
}

.nav-tools {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

.icon-btn,
.theme-toggle {
  display: grid;
  place-items: center;
  flex: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  background: var(--dark-500);
  border: 0;
  border-radius: var(--radius-sm);
  box-shadow: none;
  color: var(--white);
}

.icon-btn:hover,
.theme-toggle:hover {
  background: var(--dark-400);
}

[data-theme="light"] .icon-btn,
[data-theme="light"] .theme-toggle {
  background: var(--white);
  color: var(--dark-500);
  box-shadow: inset 0 0 0 1px var(--border);
}

[data-theme="light"] .icon-btn:hover,
[data-theme="light"] .theme-toggle:hover {
  background: var(--gray-50);
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  width: auto;
  padding: 0 0.7rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.lang-current {
  line-height: 1;
}

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

.lang-flag {
  display: block;
  width: 1.15rem;
  height: 0.78rem;
  flex: none;
  border-radius: 2px;
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.45),
    inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.lang-btn .lang-flag {
  display: none;
}

html[data-lang="es"] .lang-btn [data-flag="es"],
html[data-lang="pt"] .lang-btn [data-flag="pt"],
html:not([data-lang="es"]):not([data-lang="pt"]) .lang-btn [data-flag="en"] {
  display: block;
}

.icon-btn .icon,
.theme-toggle img {
  width: 1.125rem;
  height: 1.125rem;
}

[data-theme="light"] .theme-toggle img {
  filter: brightness(0);
}

.lang {
  position: relative;
}

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 0.4rem);
  min-width: 11.5rem;
  padding: 0.35rem;
  background: color-mix(in srgb, var(--dark-500) 55%, transparent);
  border: 1px solid color-mix(in srgb, var(--white) 22%, transparent);
  border-radius: 16px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28), inset 0 1px 0 color-mix(in srgb, var(--white) 20%, transparent);
  backdrop-filter: blur(24px) saturate(1.6);
  -webkit-backdrop-filter: blur(24px) saturate(1.6);
}

[data-theme="light"] .lang-menu {
  background: color-mix(in srgb, var(--white) 70%, transparent);
  border-color: color-mix(in srgb, var(--white) 80%, transparent);
}

.lang-menu[hidden] {
  display: none;
}

.lang-menu button {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  width: 100%;
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-radius: 6px;
}

.lang-menu button[aria-selected="true"] {
  background: var(--bg-muted);
  font-weight: 700;
}

.nav-cta {
  --mark: 2.15rem;
  --mark-right: 0.25rem;
  --mark-radius: 6px;
  --fill-scale: 14;
  --ease-fill: cubic-bezier(0.785, 0.135, 0.15, 0.86);

  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: none;
  height: 2.75rem;
  padding: 0.25rem var(--mark-right) 0.25rem 0.9rem;
  border: 1px solid color-mix(in srgb, var(--dark-500) 14%, transparent);
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 500;
  font-size: 0.9375rem;
  line-height: 1;
  white-space: nowrap;
  overflow: hidden;
}

.nav-cta__label {
  position: relative;
  z-index: 1;
}

.nav-cta__fill,
.nav-cta__ghost,
.nav-cta__mark {
  pointer-events: none;
}

.nav-cta__fill {
  position: absolute;
  z-index: 2;
  top: 50%;
  right: var(--mark-right);
  width: var(--mark);
  height: var(--mark);
  border-radius: var(--mark-radius);
  background: var(--dark-500);
  transform: translateY(-50%) scale(1);
  transform-origin: center;
}

.nav-cta__ghost {
  position: absolute;
  z-index: 2;
  inset: 0;
  display: flex;
  align-items: center;
  padding: 0 0.9rem;
  color: var(--accent);
  clip-path: inset(
    calc(50% - var(--mark) / 2)
    var(--mark-right)
    calc(50% - var(--mark) / 2)
    calc(100% - var(--mark-right) - var(--mark))
    round var(--mark-radius)
  );
}

.nav-cta__mark {
  position: relative;
  z-index: 3;
  display: grid;
  place-items: center;
  flex: none;
  width: var(--mark);
  height: var(--mark);
  border-radius: var(--mark-radius);
  background: transparent;
  color: var(--white);
  overflow: hidden;
}

.nav-cta__arrow {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0.95rem;
  height: 0.95rem;
  transform-origin: center;
}

.nav-cta__arrow--in {
  transform: translate(-170%, -50%) scale(0);
}

.nav-cta__arrow--out {
  transform: translate(-50%, -50%);
}

[data-theme="light"] .nav-cta__fill {
  background: var(--white);
}

[data-theme="light"] .nav-cta__mark {
  color: var(--dark-500);
}

[data-theme="light"] .nav-cta__ghost {
  color: var(--orange-minus-700);
}

.nav-cta.is-ready .nav-cta__fill {
  transition: transform 500ms var(--ease-fill);
}

.nav-cta.is-ready .nav-cta__ghost {
  transition: clip-path 500ms var(--ease-fill);
}

.nav-cta.is-ready .nav-cta__arrow {
  transition: transform 500ms var(--ease-fill);
}

.nav-cta.is-ready:is(:hover, :focus-visible, [data-pressed="true"]) .nav-cta__fill {
  transform: translateY(-50%) scale(var(--fill-scale));
}

.nav-cta.is-ready:is(:hover, :focus-visible, [data-pressed="true"]) .nav-cta__ghost {
  clip-path: inset(
    calc(50% - var(--mark) / 2 * var(--fill-scale))
    calc(var(--mark-right) + var(--mark) / 2 * (1 - var(--fill-scale)))
    calc(50% - var(--mark) / 2 * var(--fill-scale))
    calc(100% - var(--mark-right) - var(--mark) / 2 * (1 + var(--fill-scale)))
    round calc(var(--mark-radius) * var(--fill-scale))
  );
}

.nav-cta.is-ready:is(:hover, :focus-visible, [data-pressed="true"]) .nav-cta__arrow--in {
  transform: translate(-50%, -50%) scale(1);
}

.nav-cta.is-ready:is(:hover, :focus-visible, [data-pressed="true"]) .nav-cta__arrow--out {
  transform: translate(70%, -50%) scale(0);
}

@media (prefers-reduced-motion: reduce) {
  .nav-cta.is-ready .nav-cta__fill,
  .nav-cta.is-ready .nav-cta__ghost,
  .nav-cta.is-ready .nav-cta__arrow {
    transition: none;
  }
}

.nav-links a.nav-cta:hover,
[data-theme="light"] .nav-links a.nav-cta:hover {
  background: var(--accent);
  color: var(--on-accent);
}

.nav-cta--menu {
  display: none;
}

[data-theme="dark"] .theme-icon--light,
[data-theme="light"] .theme-icon--dark {
  display: none;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  background: var(--dark-500);
  border: 0;
  border-radius: var(--radius-sm);
}

.menu-toggle:hover {
  background: var(--dark-400);
}

[data-theme="light"] .menu-toggle {
  background: var(--white);
  box-shadow: inset 0 0 0 1px var(--border);
}

[data-theme="light"] .menu-toggle:hover {
  background: var(--gray-50);
}

[data-theme="light"] .menu-toggle span,
[data-theme="light"] .menu-toggle span::before,
[data-theme="light"] .menu-toggle span::after {
  background: var(--dark-500);
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 1rem;
  height: 2px;
  background: var(--white);
  position: relative;
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.menu-toggle span::before {
  top: -6px;
}

.menu-toggle span::after {
  top: 6px;
}

@media (max-width: 960px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    transform: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem clamp(1.25rem, 4vw, 2rem) 0.85rem;
    background: var(--bg);
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    padding: 0.85rem 0.75rem;
  }

  .nav-tools .nav-cta {
    display: none;
  }

  .nav-links a.nav-cta--menu {
    display: flex;
    align-self: stretch;
    justify-content: space-between;
    height: 2.75rem;
    margin: 0.5rem 0.75rem 0.15rem;
    padding: 0.25rem 0.25rem 0.25rem 0.9rem;
    color: var(--on-accent);
  }

  .nav-links a.nav-cta--menu:hover {
    background: var(--accent);
    color: var(--on-accent);
  }

  .nav-bar {
    flex-wrap: nowrap;
    gap: 0.5rem;
    padding-inline: var(--shell-inset);
  }

  .nav-tools {
    margin-left: auto;
  }

  .menu-toggle {
    order: 2;
  }
}

/*
  Spanish and Portuguese labels are longer than English. Below this width
  they meet the diagnostic button, so those languages use the menu earlier.
*/
@media (max-width: 1320px) {
  html[data-lang="es"] .menu-toggle,
  html[data-lang="pt"] .menu-toggle {
    display: inline-flex;
    order: 2;
  }

  html[data-lang="es"] .nav-links,
  html[data-lang="pt"] .nav-links {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    transform: none;
    flex: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem clamp(1.25rem, 4vw, 2rem) 0.85rem;
    background: var(--bg);
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }

  html[data-lang="es"] .nav-links.is-open,
  html[data-lang="pt"] .nav-links.is-open {
    display: flex;
  }

  html[data-lang="es"] .nav-links a,
  html[data-lang="pt"] .nav-links a {
    padding: 0.85rem 0.75rem;
  }

  html[data-lang="es"] .nav-tools .nav-cta,
  html[data-lang="pt"] .nav-tools .nav-cta {
    display: none;
  }

  html[data-lang="es"] .nav-links a.nav-cta--menu,
  html[data-lang="pt"] .nav-links a.nav-cta--menu {
    display: flex;
    align-self: stretch;
    justify-content: space-between;
    height: 2.75rem;
    margin: 0.5rem 0.75rem 0.15rem;
    padding: 0.25rem 0.25rem 0.25rem 0.9rem;
    color: var(--on-accent);
  }

  html[data-lang="es"] .nav-bar,
  html[data-lang="pt"] .nav-bar {
    flex-wrap: nowrap;
    gap: 0.5rem;
  }

  html[data-lang="es"] .nav-tools,
  html[data-lang="pt"] .nav-tools {
    margin-left: auto;
  }
}