/* =============================================================
   BLUESTONE — GLOBAL NAV (css/style.css)
   Ultra v4.2 ✨ mobile submenu = tap-to-open (closed by default)
   - Desktop unchanged (ink-bar, hover, CTA etc.)
   ============================================================= */

/* -------------------------------------------------------------
   Theme tokens
   ------------------------------------------------------------- */
:root {
  /* Colors */
  --nav-bg: rgba(13, 17, 27, 0.72);
  --nav-bg-solid: #0e1626;
  --nav-stroke: #1c2942;
  --nav-text: #e6edf3;
  --nav-muted: #a9b4c3;
  --nav-brand: #2563eb;
  --nav-accent: #f59e0b;
  --nav-green: #22c55e;

  /* Layout */
  --nav-radius: 16px;
  --nav-blur: 12px;
  --nav-shadow: 0 12px 32px rgba(0, 0, 0, 0.35), 0 6px 16px rgba(0, 0, 0, 0.22);
  --nav-max: 1400px;
  --nav-pad: clamp(8px, 2.5vw, 24px);

  /* Ink bar (set by JS) */
  --ink-x: 0px;
  --ink-w: 0px;
  --ink-o: 0;

  /* Cursor ring */
  --ring-size: 36px;
  --ring-border: 2px;
  --ring-color: rgba(241, 195, 10, 0.9);
  --ring-opacity: .85;

  /* Home bgfx (JS reads these; falls back if absent) */
  --bgfx-parallax: -0.80;
  --bgfx-cursor-range: 10;

  --ribbon-h: 4px;                    /* thickness */
  --ribbon-radius: 0;                 /* keep flat; set to 999px for pill */
  --ribbon-track: rgba(255,255,255,.06);
  --ribbon-grad: linear-gradient(90deg, var(--accent, #79b8ff), var(--accent-2, #8ef0d4));
}

/* -------------------------------------------------------------
   Base & reset
   ------------------------------------------------------------- */
html,
body {
  margin: 0;
  padding: 0;
}

body {
  color: var(--nav-text);
  background: #0b0f19;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* -------------------------------------------------------------
   Header shell
   ------------------------------------------------------------- */
.site-header {
  position: fixed;
  left: 50%;
  top: max(12px, env(safe-area-inset-top));
  transform: translate(-50%, -120%);
  width: min(100% - clamp(16px, 4vw, 48px), var(--nav-max));
  z-index: 1000;

  padding: clamp(.55rem, 1.2vw, .75rem) clamp(.8rem, 2vw, 1rem);
  border-radius: clamp(12px, 1.2vw, var(--nav-radius));

  color: var(--nav-text);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    var(--nav-bg);
  border: 1px solid var(--nav-stroke);
  backdrop-filter: blur(var(--nav-blur)) saturate(140%);
  box-shadow: var(--nav-shadow);
  opacity: 0;
  transition: transform .45s cubic-bezier(.2, .8, .2, 1), opacity .45s ease, background-color .3s ease;

  /* contain blending/effects so hidden header doesn't bleed */
  isolation: isolate;
}

.site-header.visible {
  transform: translate(-50%, 0);
  opacity: 1;
}

/* Gradient border halo */
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--nav-brand), var(--nav-accent));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: .55;
  transition: opacity .3s ease;
}

.site-header:hover::before { opacity: .9; }

/* Subtle animated shine */
.site-header::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: radial-gradient(600px 200px at 10% -30%, rgba(255, 255, 255, 0.10), transparent 60%);
  pointer-events: none;
  mix-blend-mode: overlay;
  opacity: .55;
  transition: opacity .3s ease;
}

.site-header:hover::after { opacity: .8; }

/* Compact + solid when scrolled (toggled via JS) */
body.scrolled .site-header {
  padding: clamp(.45rem, 1vw, .55rem) clamp(.7rem, 1.6vw, .85rem);
  background: var(--nav-bg-solid);
  transform: translate(-50%, 0) scale(.995);
}
body.scrolled .site-header::after { opacity: .45; }

/* Inner layout */
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(.5rem, 2vw, 1rem);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-weight: 900;
  color: var(--nav-text);
  text-decoration: none;
}
.logo img { height: clamp(28px, 5vw, 44px); width: auto; }

/* -------------------------------------------------------------
   Main nav (desktop) + Aurora Ink Bar
   ------------------------------------------------------------- */
.main-nav { position: relative; }

.main-nav .nav-list {
  list-style: none;
  display: flex;
  gap: clamp(.4rem, 1.5vw, 1rem);
  margin: 0;
  padding: 0;
}
.main-nav .nav-list>li { position: relative; }

.main-nav a {
  display: inline-block;
  color: var(--nav-text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: .2px;
  padding: clamp(.45rem, 1.4vw, .7rem) clamp(.55rem, 1.6vw, .8rem);
  border-radius: 12px;
  position: relative;
  transition: color .2s ease, transform .2s ease, background-color .2s ease;
  font-size: clamp(.92rem, 1.1vw, 1rem);
}
.main-nav a:hover { transform: translateY(-1px); background: rgba(255, 255, 255, 0.04); }

/* Active link: subtle ring + gradient text */
.main-nav a.active {
  outline: 2px solid color-mix(in oklab, var(--nav-brand) 45%, transparent);
  outline-offset: 2px;
  background-clip: text; -webkit-background-clip: text;
  color: transparent;
  background-image: linear-gradient(90deg, var(--nav-brand), var(--nav-accent));
}

/* Animated INK BAR */
.main-nav::after {
  content: "";
  position: absolute;
  left: var(--ink-x);
  bottom: 6px;
  width: var(--ink-w);
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--nav-brand), var(--nav-accent));
  opacity: var(--ink-o);
  pointer-events: none;
  filter: drop-shadow(0 0 8px color-mix(in oklab, var(--nav-brand) 60%, transparent));
  transition: left .35s cubic-bezier(.2, .8, .2, 1), width .35s cubic-bezier(.2, .8, .2, 1), opacity .2s ease;
}

/* Aurora glow layer */
.main-nav::before {
  content: "";
  position: absolute;
  left: calc(var(--ink-x) - 10px);
  bottom: 2px;
  width: calc(var(--ink-w) + 20px);
  height: 14px;
  border-radius: 10px;
  background:
    radial-gradient(40% 140% at 30% 50%, color-mix(in oklab, var(--nav-brand) 30%, transparent), transparent 70%),
    radial-gradient(40% 140% at 70% 50%, color-mix(in oklab, var(--nav-accent) 30%, transparent), transparent 70%);
  opacity: calc(var(--ink-o) * .55);
  pointer-events: none;
  filter: blur(8px);
  transition: left .35s cubic-bezier(.2, .8, .2, 1), width .35s cubic-bezier(.2, .8, .2, 1), opacity .2s ease;
}

/* Sparkle dot (JS appends .nav-ink-spark) */
.nav-ink-spark {
  position: absolute;
  bottom: 5px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  z-index: 2;
  background: radial-gradient(circle at 30% 30%, #fff, rgba(255, 255, 255, 0.2) 60%, transparent 70%);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.35), 0 0 24px color-mix(in oklab, var(--nav-brand) 50%, transparent);
}

/* Caret for items that have dropdowns */
.nav-list .has-dropdown>a::after {
  content: "";
  display: inline-block;
  width: .5em; height: .5em;
  margin-left: .35rem; vertical-align: middle;
  border: 2px solid currentColor;
  border-top: transparent; border-left: transparent;
  transform: rotate(45deg);
  transition: transform .25s ease;
}
.nav-list .has-dropdown:focus-within>a::after,
.nav-list .has-dropdown:hover>a::after {
  transform: rotate(225deg) translateY(2px);
}

/* Dropdown menus (desktop + keyboard) */
.nav-list .has-dropdown { position: relative; }

.nav-list .has-dropdown .dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  min-width: min(260px, 86vw);
  list-style: none;
  margin: 0;
  padding: .35rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    var(--nav-bg);
  border: 1px solid var(--nav-stroke);
  border-radius: 14px;
  box-shadow: var(--nav-shadow);
  transform-origin: top left;
  transform: perspective(800px) rotateX(-12deg) translateY(-4px) scale(.94);
  opacity: 0;
  pointer-events: none;
  filter: saturate(120%);
  transition: transform .35s cubic-bezier(.2, .8, .2, 1), opacity .25s ease;
  z-index: 1200;
}

/* Bridge to prevent hover gap flicker */
.nav-list .has-dropdown .dropdown::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: -14px; height: 14px;
}

.nav-list .has-dropdown:hover .dropdown,
.nav-list .has-dropdown:focus-within .dropdown {
  opacity: 1; pointer-events: auto;
  transform: perspective(800px) rotateX(0) translateY(0) scale(1);
}

/* Dropdown items */
.nav-list .has-dropdown .dropdown li { border-radius: 10px; overflow: hidden; }
.nav-list .has-dropdown .dropdown a {
  display: flex; align-items: center; gap: .6rem;
  padding: .6rem .7rem;
  color: var(--nav-text);
  border-radius: 10px;
  text-decoration: none;
  transition: background-color .2s ease, transform .2s ease;
  font-size: clamp(.9rem, 1vw, .95rem);
}
.nav-list .has-dropdown .dropdown a:hover,
.nav-list .has-dropdown .dropdown a.active {
  background: rgba(255, 255, 255, 0.06);
  transform: translateX(2px);
}

/* -------------------------------------------------------------
   Header actions (search, language, contact CTA, burger)
   ------------------------------------------------------------- */
.header-actions { display: flex; align-items: center; gap: clamp(.5rem, 1.4vw, .75rem); }

.search-btn {
  appearance: none;
  border: 1px solid var(--nav-stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--nav-text);
  width: 40px; height: 40px;
  border-radius: 12px; cursor: pointer;
  display: grid; place-items: center;
  transition: transform .2s ease, background-color .2s ease, box-shadow .2s ease;
}
.search-btn:hover { transform: translateY(-1px); background: rgba(255, 255, 255, 0.06); box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25); }
.search-btn:active { transform: translateY(0); }

.lang-switch {
  appearance: none;
  border: 1px solid var(--nav-stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--nav-text);
  height: 40px; padding: 0 .6rem;
  border-radius: 12px; cursor: pointer;
}
.lang-switch:focus-visible { outline: 2px solid color-mix(in oklab, var(--nav-accent) 45%, transparent); outline-offset: 2px; }

/* Contact CTA — pill gradient + sheen */
.nav-btn-contact {
  display: inline-block;
  color: #0b0f19; font-weight: 900; text-decoration: none;
  padding: .55rem .95rem; border-radius: 999px;
  background: linear-gradient(135deg, var(--nav-accent), var(--nav-brand));
  border: 1px solid color-mix(in oklab, var(--nav-brand) 40%, var(--nav-accent) 40%);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.35), 0 0 0 6px color-mix(in oklab, var(--nav-brand) 18%, transparent);
  position: relative; overflow: hidden;
  transition: transform .18s ease, box-shadow .25s ease, filter .25s ease;
  font-size: clamp(.9rem, 1vw, 1rem);
}
.nav-btn-contact::after {
  content: ""; position: absolute; top: -120%; left: -20%;
  width: 50%; height: 300%; transform: rotate(20deg);
  background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,.35) 50%, rgba(255,255,255,0) 100%);
  opacity: 0; transition: opacity .25s ease, transform .8s ease;
}
.nav-btn-contact:hover { transform: translateY(-1px); box-shadow: 0 16px 28px rgba(0, 0, 0, 0.45), 0 0 0 10px color-mix(in oklab, var(--nav-brand) 22%, transparent); }
.nav-btn-contact:hover::after { opacity: .6; transform: translateX(260%) rotate(20deg); }
.nav-btn-contact:active { transform: translateY(0); }
.nav-btn-contact:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }

/* Burger (hidden on desktop) */
.nav-toggle {
  appearance: none;
  border: 1px solid var(--nav-stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--nav-text);
  width: 40px; height: 40px;
  border-radius: 12px; cursor: pointer;
  display: none;
}
.nav-toggle:hover { background: rgba(255, 255, 255, 0.06); }

/* -------------------------------------------------------------
   Mobile / tablet navigation
   ------------------------------------------------------------- */
@media (max-width: 1200px) {
  .main-nav .nav-list { gap: clamp(.3rem, 1.2vw, .7rem); }
}

@media (max-width: 992px) {
  .nav-toggle { display: block; }
  .search-btn, .lang-switch, .nav-btn-contact { display: none; }

  .main-nav { position: static; }   /* keep anchor position */

  .main-nav .nav-list{ --nav-bg: rgba(13, 17, 27, 0.88); }
  .main-nav .nav-list {
    position: absolute;
    top: calc(100% + 10px);
    left: max(8px, var(--nav-pad));
    right: max(8px, var(--nav-pad));
    z-index: 1010;

    display: flex; flex-direction: column; gap: .25rem;
    margin: 0; padding: .6rem .5rem max(.5rem, env(safe-area-inset-bottom));
    border-radius: 14px; list-style: none;

    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
      var(--nav-bg);
    border: 1px solid var(--nav-stroke); box-shadow: var(--nav-shadow);

    /* Animation in/out */
    transform-origin: top right;
    transform: perspective(600px) rotateX(-10deg) scale(.92);
    opacity: 0; pointer-events: none;
    transition: transform .35s cubic-bezier(.2, .8, .2, 1), opacity .25s ease;

    /* Critical responsiveness fixes */
    max-height: calc(100dvh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
    overflow-y: auto; -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain; scrollbar-gutter: stable both-edges;
    touch-action: pan-y;
  }

  @supports (height: 100svh) {
    .main-nav .nav-list {
      max-height: calc(100svh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
    }
  }

  .main-nav.open .nav-list {
    opacity: 1;
    transform: perspective(600px) rotateX(0) scale(1);
    pointer-events: auto;
  }

  /* bigger tap targets on mobile */
  .main-nav .nav-list a {
    padding: .8rem .9rem;
    border-radius: 10px;
    font-size: 1rem;
  }
  .main-nav .nav-list a:hover { background: rgba(255, 255, 255, 0.06); }

  /* --- Mobile submenus: CLOSED by default; open with .sub-open --- */
  .nav-list .has-dropdown .dropdown {
    position: static;
    box-shadow: none;
    background: transparent;
    border: none;
    margin-left: .25rem;

    /* closed state */
    max-height: 0;
    padding: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      max-height .30s ease,
      opacity .25s ease,
      visibility .25s ease,
      padding .20s ease;
  }

  .nav-list .has-dropdown.sub-open .dropdown {
    max-height: 800px;              /* enough for all items */
    padding: .25rem 0;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  /* Rotate caret when submenu is open */
  .nav-list .has-dropdown.sub-open > a::after {
    transform: rotate(225deg) translateY(2px);
  }

  .nav-list .has-dropdown .dropdown a { padding: .65rem 1rem; }

  /* Hide ink bar on mobile menu */
  .main-nav::after, .main-nav::before { opacity: 0; }
}

/* Very small phones */
@media (max-width: 480px) {
  .site-header { width: min(100% - 16px, var(--nav-max)); border-radius: 12px; }
  .logo img { height: 32px; }
  .main-nav .nav-list {
    left: 8px; right: 8px;
    padding: .5rem .45rem max(.5rem, env(safe-area-inset-bottom));
  }
}

/* Ultra-wide desktops */
@media (min-width: 1600px) {
  :root { --nav-max: 1600px; }
}

/* -------------------------------------------------------------
   Accessibility & focus states
   ------------------------------------------------------------- */
.main-nav a:focus-visible,
.search-btn:focus-visible,
.lang-switch:focus-visible,
.nav-toggle:focus-visible,
.nav-btn-contact:focus-visible {
  outline: 2px solid color-mix(in oklab, var(--nav-accent) 45%, transparent);
  outline-offset: 2px;
}

@media (pointer: coarse) {
  .main-nav a { padding: .8rem 1rem; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .site-header,
  .main-nav::after,
  .main-nav::before,
  .nav-list .has-dropdown .dropdown,
  .nav-btn-contact,
  .nav-btn-contact::after {
    transition: none !important;
    animation: none !important;
  }
}

/* -------------------------------------------------------------
   Cursor ring
   ------------------------------------------------------------- */
#cursor-ring {
  position: fixed; left: 0; top: 0;
  width: var(--ring-size); height: var(--ring-size);
  margin: 0; padding: 0; border-radius: 999px;
  border: var(--ring-border) solid var(--ring-color);
  box-shadow:
    0 0 0 2px color-mix(in oklab, var(--ring-color) 20%, transparent),
    0 0 18px color-mix(in oklab, var(--ring-color) 40%, transparent);
  transform: translate(-50%, -50%);
  opacity: var(--ring-opacity);
  pointer-events: none; z-index: 9999;
  transition: width .12s ease, height .12s ease, border-color .12s ease, opacity .2s ease, box-shadow .2s ease;
}
#cursor-ring::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  border: var(--ring-border) solid var(--ring-color);
  opacity: 0; transform: scale(.6);
}
#cursor-ring.pulse::after { animation: ring-pulse .35s cubic-bezier(.2, .8, .2, 1); }
@keyframes ring-pulse {
  0% { opacity: .9; transform: scale(.6); }
  100% { opacity: 0; transform: scale(1.6); }
}
#cursor-ring.ring-tight {
  width: calc(var(--ring-size) * .80);
  height: calc(var(--ring-size) * .80);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--ring-color) 28%, transparent), 0 0 22px color-mix(in oklab, var(--ring-color) 60%, transparent);
}
body.ring-hide #cursor-ring { opacity: 0; }
@media (pointer: coarse) { #cursor-ring { display: none; } }
@media (prefers-reduced-motion: reduce) { #cursor-ring { transition: none; } }

/* -------------------------------------------------------------
   Interaction safety for hidden header
   ------------------------------------------------------------- */

/* Header should accept clicks by default */
.site-header { pointer-events: auto; }

/* while header has [inert], it must not capture any interaction */
.site-header[inert],
.site-header[inert] * { pointer-events: none !important; }

/* When not .visible and not explicitly .interactive, disable all pointers */
.site-header:not(.visible):not(.interactive),
.site-header:not(.visible):not(.interactive) * { pointer-events: none !important; }

/* If the browser supports :has(), also allow clicks when mobile menu is open */
@supports (selector(:has(*))) {
  .site-header:not(.visible):has(.main-nav.open) { pointer-events: auto !important; }
  body:has(.main-nav.open) { overflow: hidden; } /* nice-to-have */
}


/* ===== Scroll Progress Ribbon (global) ===== */


#scroll-ribbon{
  position: fixed;
  top: 0;
  left: 0; right: 0;
  height: var(--ribbon-h);
  z-index: 9999;
  pointer-events: none;               /* never blocks clicks */
  contain: layout style;
}

#scroll-ribbon::before{
  content: "";
  position: absolute; inset: 0;
  background: var(--ribbon-track);
  border-radius: var(--ribbon-radius);
}

#scroll-ribbon .bar{
  position: absolute; inset: 0;
  transform-origin: 0 50%;
  transform: scaleX(var(--scroll, 0));
  background: var(--ribbon-grad);
  border-radius: var(--ribbon-radius);
  box-shadow:
    0 0 8px rgb(var(--glow1, 255 255 255) / .20),
    0 0 22px rgb(var(--glow2, 11 201 205) / .28);
  will-change: transform;
}

/* Hide when there’s nothing to scroll */
#scroll-ribbon[data-hidden="1"]{ opacity: 0; }

/* Respect safe areas on notched devices */
@supports (padding: max(0px)){
  #scroll-ribbon{ padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right); }
}

/* Slightly thinner on very small phones */
@media (max-width: 420px){
  :root{ --ribbon-h: 3px; }
}