/* /css/main-website/nav.css
   ==========================================================================
   GFC – Main Website Navigation
   --------------------------------------------------------------------------
   Supports:
   - /partials/en/main-website/nav.html
   - /partials/de/main-website/nav.html
   - /js/main-website/nav.js
   - Desktop and mobile navigation
   - Active section tracking
   - Dedicated page links
   - Presale status CTA
   ========================================================================== */


/* ==========================================================================
   1. HEADER FOUNDATION
   ========================================================================== */

.site-header {
  --gfc-nav-bg: rgba(11, 17, 32, 0.9);
  --gfc-nav-bg-strong: rgba(11, 17, 32, 0.98);
  --gfc-nav-surface: rgba(255, 255, 255, 0.045);
  --gfc-nav-surface-hover: rgba(92, 200, 255, 0.09);
  --gfc-nav-border: rgba(255, 255, 255, 0.12);
  --gfc-nav-border-hover: rgba(92, 200, 255, 0.42);
  --gfc-nav-text: var(--text, #f5f7fb);
  --gfc-nav-muted: var(--muted, #a9b2c3);
  --gfc-nav-accent: var(--accent, #5cc8ff);
  --gfc-nav-active-text: var(--brand-ink, #07111f);
  --gfc-nav-radius: 999px;
  --gfc-nav-menu-radius: 18px;

  position: sticky;
  inset-block-start: 0;
  z-index: 1000;
  inline-size: 100%;
  border-block-end: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--gfc-nav-bg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.14);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  min-height: var(--header-h, 76px);
}

.gfc-header-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  border-radius: 14px;
  text-decoration: none;
}

.gfc-header-logo img {
  display: block;
  inline-size: clamp(48px, 5vw, 62px);
  block-size: auto;
  aspect-ratio: 1;
  object-fit: contain;
}

.gfc-header-logo:focus-visible {
  outline: var(--focus-ring, 3px solid rgba(92, 200, 255, 0.72));
  outline-offset: var(--focus-offset, 3px);
}

.site-nav {
  display: flex;
  justify-content: center;
  min-width: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: max-content;
}

.gfc-faq-page .gfc-header-logo {
  grid-column: 1;
}

.gfc-faq-page .site-nav {
  grid-column: 2;
}

.gfc-faq-page .header-actions {
  grid-column: 3;
}


/* ==========================================================================
   2. LANGUAGE SWITCH
   ========================================================================== */

.modal-lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  min-height: 48px;
  padding: 0.125rem 0.35rem;
  border: 1px solid var(--gfc-nav-border);
  border-radius: var(--gfc-nav-radius);
  background: var(--gfc-nav-surface);
}

.lang-pill-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding-inline: 0.35rem;
  border-radius: 999px;
  color: var(--gfc-nav-muted);
  font-size: 0.78rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition:
    background-color 160ms ease,
    color 160ms ease;
}

.lang-pill-btn:hover {
  background: var(--gfc-nav-surface-hover);
  color: var(--gfc-nav-accent);
}

.lang-pill-btn.is-active,
.lang-pill-btn[aria-current="page"] {
  background: linear-gradient(
    90deg,
    var(--brand-blue, #5cc8ff),
    var(--brand-green, #62e6a7)
  );
  color: var(--gfc-nav-active-text);
}

.lang-pill-btn:focus-visible {
  outline: var(--focus-ring, 3px solid rgba(92, 200, 255, 0.72));
  outline-offset: 2px;
}

.lang-sep {
  color: var(--gfc-nav-muted);
  font-size: 0.75rem;
  opacity: 0.65;
}


/* ==========================================================================
   3. NAVIGATION ROOT
   ========================================================================== */

.main-nav,
[data-nav-root] {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.nav-list,
[data-nav-list] {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  min-width: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list > li,
[data-nav-list] > li {
  min-width: 0;
}


/* ==========================================================================
   4. NAVIGATION LINKS
   ========================================================================== */

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 38px;
  max-width: 100%;
  padding: 0.5rem 0.72rem;
  border: 1px solid var(--gfc-nav-border);
  border-radius: var(--gfc-nav-radius);
  background: var(--gfc-nav-surface);
  color: var(--gfc-nav-text);
  font-size: 0.88rem;
  font-weight: 750;
  line-height: 1.15;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    box-shadow 160ms ease,
    transform 140ms ease;
}

.nav-link:hover {
  border-color: var(--gfc-nav-border-hover);
  background: var(--gfc-nav-surface-hover);
  color: var(--gfc-nav-accent);
}

.nav-link:focus-visible {
  outline: var(--focus-ring, 3px solid rgba(92, 200, 255, 0.72));
  outline-offset: var(--focus-offset, 3px);
  border-color: transparent;
}


/* Active landing-page section */

.nav-link.is-active,
.nav-link[aria-current="location"] {
  border-color: transparent;
  background: linear-gradient(
    90deg,
    var(--brand-blue, #5cc8ff),
    var(--brand-green, #62e6a7)
  );
  color: var(--gfc-nav-active-text);
  box-shadow: 0 8px 22px rgba(92, 200, 255, 0.2);
}


/* ==========================================================================
   5. SECONDARY PAGE LINKS
   ========================================================================== */

.nav-page-link {
  border-color: rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.018);
  color: var(--gfc-nav-muted);
}

.nav-page-link:hover {
  border-color: var(--gfc-nav-border-hover);
  background: var(--gfc-nav-surface-hover);
  color: var(--gfc-nav-accent);
}


/* ==========================================================================
   6. PRIMARY TRANSPARENCY CTA
   ========================================================================== */

.nav-cta {
  border-color: rgba(92, 200, 255, 0.5);
  background: rgba(92, 200, 255, 0.1);
  color: var(--gfc-nav-accent);
  font-weight: 850;
}

.nav-cta:hover {
  border-color: rgba(92, 200, 255, 0.75);
  background: rgba(92, 200, 255, 0.16);
  color: #8bddff;
  transform: translateY(-1px);
}


/* ==========================================================================
   7. NAVIGATION SEPARATOR
   ========================================================================== */

.main-nav .nav-separator {
  inline-size: 1px;
  block-size: 22px;
  flex: 0 0 1px;
  margin-inline: 0.2rem;
  background: rgba(255, 255, 255, 0.14);
}


/* ==========================================================================
   8. MOBILE TOGGLE
   ========================================================================== */

.nav-toggle,
[data-nav-toggle] {
  display: none;
}

.nav-toggle {
  align-items: center;
  justify-content: center;
  min-inline-size: 44px;
  min-block-size: 44px;
  padding: 0.55rem;
  border: 1px solid var(--gfc-nav-border);
  border-radius: var(--gfc-nav-radius);
  background: var(--gfc-nav-surface);
  color: var(--gfc-nav-text);
  cursor: pointer;
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    color 160ms ease,
    transform 140ms ease;
}

.nav-toggle:hover {
  border-color: var(--gfc-nav-border-hover);
  background: var(--gfc-nav-surface-hover);
  color: var(--gfc-nav-accent);
}

.nav-toggle:focus-visible {
  outline: var(--focus-ring, 3px solid rgba(92, 200, 255, 0.72));
  outline-offset: var(--focus-offset, 3px);
}

.nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  inline-size: 22px;
}

.nav-toggle-bar {
  display: block;
  inline-size: 22px;
  block-size: 2px;
  border-radius: 999px;
  background: currentColor;
  transform-origin: center;
  transition:
    transform 180ms ease,
    opacity 160ms ease;
}


/* Open-state icon */

[data-nav-root].is-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

[data-nav-root].is-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

[data-nav-root].is-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}


/* ==========================================================================
   9. DESKTOP NAVIGATION
   ========================================================================== */

@media (min-width: 1024px) {
  .nav-toggle,
  [data-nav-toggle] {
    display: none;
  }

  [data-nav-root] [data-nav-list] {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
  }
}


/* ==========================================================================
   10. COMPACT DESKTOP
   ========================================================================== */

@media (max-width: 1240px) and (min-width: 1024px) {
  .header-inner {
    gap: 0.75rem;
  }

  .nav-list,
  [data-nav-list] {
    gap: 0.3rem;
  }

  .nav-link {
    min-height: 44px;
    padding: 0.45rem 0.58rem;
    font-size: 0.8rem;
  }

  .modal-lang-switch {
    padding-inline: 0.4rem;
  }
}


/* ==========================================================================
   11. MOBILE NAVIGATION
   ========================================================================== */

@media (max-width: 1023px) {
.header-inner {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.65rem;
  min-height: 68px;
}

.gfc-header-logo {
  inline-size: 48px;
  block-size: 48px;
}

.gfc-header-logo img {
  inline-size: 48px;
  block-size: 48px;
  max-inline-size: 48px;
  max-block-size: 48px;
}

.site-nav {
  justify-content: flex-end;
  justify-self: end;
}

.header-actions {
  justify-self: end;
}

  .main-nav,
  [data-nav-root] {
    display: inline-flex;
    align-items: center;
    justify-content: flex-end;
  }

  .nav-toggle,
  [data-nav-toggle] {
    display: inline-flex;
  }

  .main-nav .nav-separator {
    display: none;
  }

  [data-nav-root] [data-nav-list] {
    position: fixed;
    inset-block-start: calc(var(--header-h, 68px) + 0.5rem);
    inset-inline-start: 0.75rem;
    inset-inline-end: auto;
    z-index: 10;
    display: none;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0.4rem;
    inline-size: min(340px, calc(100vw - 2rem));
    max-block-size: calc(100dvh - var(--header-h, 76px) - 2rem);
    margin: 0;
    padding: 0.75rem;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    border: 1px solid var(--gfc-nav-border);
    border-radius: var(--gfc-nav-menu-radius);
    background: var(--gfc-nav-bg-strong);
    box-shadow:
      0 24px 60px rgba(0, 0, 0, 0.42),
      0 0 0 1px rgba(255, 255, 255, 0.025);
    -webkit-backdrop-filter: blur(22px);
    backdrop-filter: blur(22px);
    -webkit-overflow-scrolling: touch;
  }

  [data-nav-root].is-open [data-nav-list]:not([hidden]) {
    display: flex;
  }

  [data-nav-root] [data-nav-list][hidden] {
    display: none !important;
  }

  [data-nav-root] [data-nav-list] > li {
    inline-size: 100%;
  }

  [data-nav-root] .nav-link {
    inline-size: 100%;
    min-block-size: 44px;
    justify-content: flex-start;
    padding: 0.7rem 0.8rem;
    border-radius: 12px;
    text-align: start;
    white-space: normal;
  }

  [data-nav-root] .nav-link.is-active,
  [data-nav-root] .nav-link[aria-current="location"] {
    box-shadow: none;
  }

  [data-nav-root] .nav-page-link {
    color: var(--gfc-nav-text);
  }

  [data-nav-root] .nav-cta {
    justify-content: center;
    margin-block-start: 0.25rem;
    text-align: center;
  }
}


/* ==========================================================================
   12. SMALL MOBILE
   ========================================================================== */

@media (max-width: 560px) {
.header-inner {
  grid-template-columns: 48px minmax(0, 1fr) auto;
  gap: 0.45rem;
}

  .modal-lang-switch {
    gap: 0.1rem;
    min-height: 48px;
    padding: 0.125rem 0.25rem;
  }

  .lang-pill-btn {
    min-width: 44px;
    min-height: 44px;
    padding-inline: 0.3rem;
    font-size: 0.72rem;
  }

  .nav-toggle {
    min-inline-size: 44px;
    min-block-size: 44px;
  }

  [data-nav-root] [data-nav-list] {
    inset-inline-start: 0.625rem;
    inset-inline-end: 0.625rem;
    inline-size: auto;
  }
}



/* ==========================================================================
   13. NO-JS FALLBACK + MOBILE SCROLL CONTAINMENT
   ========================================================================== */

.noscript-nav {
  border-block-end: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(11, 17, 32, 0.98);
}

.noscript-nav-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-block: 0.65rem;
}

.noscript-nav a {
  display: inline-flex;
  align-items: center;
  min-block-size: 40px;
  padding: 0.55rem 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text, #f5f7fb);
  font-size: 0.86rem;
  font-weight: 750;
  line-height: 1.15;
  text-decoration: none;
}

.noscript-nav a:focus-visible {
  outline: var(--focus-ring, 3px solid rgba(92, 200, 255, 0.72));
  outline-offset: var(--focus-offset, 3px);
}

@media (max-width: 1023px) {
  /* Modern browsers can lock the page without requiring a nav.js change. */
  html:has([data-nav-root].is-open),
  body:has([data-nav-root].is-open) {
    overflow: hidden;
    overscroll-behavior: none;
  }

  .noscript-nav-inner {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .noscript-nav a {
    justify-content: center;
    min-block-size: 44px;
    text-align: center;
  }
}

@media (max-width: 360px) {
  .noscript-nav-inner {
    grid-template-columns: 1fr;
  }
}



@media (min-width: 1024px) {
  .noscript-nav {
    display: none !important;
  }
}


/* ==========================================================================
   14. LIGHT COLOR SCHEME
   ========================================================================== */

@media (prefers-color-scheme: light) {
  .site-header {
    --gfc-nav-bg: rgba(255, 255, 255, 0.9);
    --gfc-nav-bg-strong: rgba(255, 255, 255, 0.985);
    --gfc-nav-surface: rgba(14, 24, 42, 0.035);
    --gfc-nav-surface-hover: rgba(20, 135, 190, 0.09);
    --gfc-nav-border: rgba(14, 24, 42, 0.13);
    --gfc-nav-border-hover: rgba(20, 135, 190, 0.42);
    --gfc-nav-text: var(--text, #111827);
    --gfc-nav-muted: var(--muted, #5f6b7d);
    --gfc-nav-accent: var(--accent, #087aaa);
    --gfc-nav-active-text: #07111f;

    border-block-end-color: rgba(14, 24, 42, 0.09);
    box-shadow: 0 8px 28px rgba(14, 24, 42, 0.08);
  }

  .main-nav .nav-separator {
    background: rgba(14, 24, 42, 0.14);
  }

  .nav-page-link {
    border-color: rgba(14, 24, 42, 0.1);
    background: rgba(14, 24, 42, 0.018);
  }

  .nav-link.is-active,
  .nav-link[aria-current="location"],
  .lang-pill-btn.is-active,
  .lang-pill-btn[aria-current="page"] {
    background: linear-gradient(90deg, #0ea5e9, #74d7ff);
    color: #07111f;
  }

  .noscript-nav {
    border-block-end-color: rgba(14, 24, 42, 0.09);
    background: rgba(255, 255, 255, 0.985);
  }

  .noscript-nav a {
    border-color: rgba(14, 24, 42, 0.13);
    background: rgba(14, 24, 42, 0.035);
    color: var(--text, #111827);
  }
}


/* ==========================================================================
   14B. EXPLICIT DARK PAGE OVERRIDE
   ========================================================================== */

html[data-color-scheme="dark"] .site-header {
  --gfc-nav-bg: rgba(11, 17, 32, 0.9);
  --gfc-nav-bg-strong: rgba(11, 17, 32, 0.98);
  --gfc-nav-surface: rgba(255, 255, 255, 0.045);
  --gfc-nav-surface-hover: rgba(92, 200, 255, 0.09);
  --gfc-nav-border: rgba(255, 255, 255, 0.12);
  --gfc-nav-border-hover: rgba(92, 200, 255, 0.42);
  --gfc-nav-text: #e5e7eb;
  --gfc-nav-muted: #9ca3af;
  --gfc-nav-accent: #5cc8ff;
  --gfc-nav-active-text: #020617;

  border-block-end-color: rgba(255, 255, 255, 0.08);
  background: var(--gfc-nav-bg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.14);
}

html[data-color-scheme="dark"] .main-nav .nav-separator {
  background: rgba(255, 255, 255, 0.14);
}

html[data-color-scheme="dark"] .nav-page-link {
  border-color: rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.018);
}

html[data-color-scheme="dark"] .nav-link.is-active,
html[data-color-scheme="dark"] .nav-link[aria-current="location"],
html[data-color-scheme="dark"] .lang-pill-btn.is-active,
html[data-color-scheme="dark"] .lang-pill-btn[aria-current="page"] {
  background: linear-gradient(
    90deg,
    var(--brand-blue, #0ea5e9),
    var(--brand-green, #5cc8ff)
  );
  color: #020617;
}

html[data-color-scheme="dark"] .noscript-nav {
  border-block-end-color: rgba(255, 255, 255, 0.08);
  background: rgba(11, 17, 32, 0.98);
}

html[data-color-scheme="dark"] .noscript-nav a {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: #e5e7eb;
}


/* ==========================================================================
   14C. WHITEPAPER – FORCE CONSISTENT DARK HEADER
   ========================================================================== */

.gfc-whitepaper-page .site-header {
  --gfc-nav-bg: rgba(11, 17, 32, 0.9);
  --gfc-nav-bg-strong: rgba(11, 17, 32, 0.98);
  --gfc-nav-surface: rgba(255, 255, 255, 0.045);
  --gfc-nav-surface-hover: rgba(92, 200, 255, 0.09);
  --gfc-nav-border: rgba(255, 255, 255, 0.12);
  --gfc-nav-border-hover: rgba(92, 200, 255, 0.42);
  --gfc-nav-text: #e5e7eb;
  --gfc-nav-muted: #9ca3af;
  --gfc-nav-accent: #5cc8ff;
  --gfc-nav-active-text: #020617;

  border-block-end-color: rgba(255, 255, 255, 0.08);
  background: var(--gfc-nav-bg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.14);
}

.gfc-whitepaper-page .lang-pill-btn.is-active,
.gfc-whitepaper-page .lang-pill-btn[aria-current="page"] {
  background: linear-gradient(
    90deg,
    var(--brand-blue, #0ea5e9),
    var(--brand-green, #5cc8ff)
  );
  color: #020617;
}

/* ==========================================================================
   15. REDUCED MOTION
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .nav-link,
  .nav-toggle,
  .nav-toggle-bar,
  .lang-pill-btn {
    transition: none;
  }

  .nav-link:hover,
  .nav-cta:hover {
    transform: none;
  }
}


/* ==========================================================================
   16. FORCED COLORS
   ========================================================================== */

@media (forced-colors: active) {
  .site-header {
    border-block-end: 1px solid CanvasText;
    background: Canvas;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .nav-link,
  .nav-toggle,
  .modal-lang-switch {
    border: 1px solid ButtonText;
    background: Canvas;
    color: CanvasText;
  }

  .nav-link.is-active,
  .nav-link[aria-current="location"],
  .lang-pill-btn.is-active,
  .lang-pill-btn[aria-current="page"] {
    border-color: Highlight;
    background: Highlight;
    color: HighlightText;
  }

  .main-nav .nav-separator {
    background: CanvasText;
  }
}


/* ==========================================================================
   17. PRINT
   ========================================================================== */

@media print {
  .site-header {
    position: static;
    border: 0;
    box-shadow: none;
    background: transparent;
  }

  .site-nav,
  .header-actions {
    display: none !important;
  }

  .header-inner {
    display: block;
    min-height: 0;
  }

  .gfc-header-logo img {
    inline-size: 48px;
  }
}