/* ============================================================
   Privacy Scanner Website — Nav component styles
   Source: DESIGN_SPEC.md §7.1 (with prompt-level adaptations)

   Token dependencies (must load before this file):
     - All §6 surface, text, teal, border, shadow tokens
     - --font-sans, --font-mono
     - --fs-h4, --fs-body-sm, --fs-mono-sm, --fs-eyebrow
     - --sp-*, --r-*, --dur-*, --ease-*
     - --btn-h-sm, --btn-h-md, --btn-h-lg
     - --nav-h (72px), --nav-h-mobile (60px), --nav-bg, --nav-blur
     - --z-sticky, --z-modal
     - --focus-ring, --glow-teal-sm

   Token notes (prompt mentioned tokens that don't exist):
     - prompt --nav-h-desktop  → using --nav-h           (72px)
     - prompt --z-nav          → using --z-sticky        (100)
     - prompt --z-popover      → using --z-modal         (600)
     - prompt --focus-shadow   → using --focus-ring

   Reduced motion: all transitions use --dur-* tokens which are
   zeroed in tokens.css §6.6 under prefers-reduced-motion. No
   per-component override required here.
   ============================================================ */


/* ============================================================
   Nav bar — sticky top, blurred translucent background
   ============================================================ */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  width: 100%;
  height: var(--nav-h);
  background: var(--nav-bg);
  backdrop-filter: var(--nav-blur);
  -webkit-backdrop-filter: var(--nav-blur);
  border-block-end: 1px solid var(--border-soft);
}

/* Mobile: lighter blur (Safari iOS perf — see §7.1 impl note #1) */
@media (max-width: 600px) {
  .nav-bar {
    height: var(--nav-h-mobile);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
  }
}

.nav-inner {
  max-width: var(--maxw-wide);
  margin-inline: auto;
  height: 100%;
  padding-inline: var(--gutter-mobile);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}
@media (min-width: 600px)  { .nav-inner { padding-inline: var(--gutter-tablet); } }
@media (min-width: 1024px) { .nav-inner { padding-inline: var(--gutter-desktop); } }


/* ============================================================
   Brand mark — "PRIVACY/SCANNER" with teal ASCII slash
   ============================================================ */
.brand-mark {
  display: inline-flex;
  align-items: baseline;
  gap: 0;
  color: var(--text);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: var(--fs-h4);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  line-height: 1;
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease-out);
}
.brand-mark:hover,
.brand-mark:focus-visible { color: var(--text); }
.brand-mark:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--r-xs);
}
.brand-word { display: inline; }
.brand-slash {
  display: inline;
  color: var(--teal);
  font-weight: var(--fw-regular);  /* lighter than the words */
  margin: 0 1px;
  transition: text-shadow var(--dur-fast) var(--ease-out);
}
.brand-mark:hover .brand-slash,
.brand-mark:focus-visible .brand-slash {
  text-shadow: 0 0 8px var(--teal-glow);
}


/* ============================================================
   Anchor links (desktop only)
   ============================================================ */
.nav-links {
  display: none;
}
@media (min-width: 1024px) {
  .nav-links {
    display: flex;
    align-items: center;
    gap: var(--sp-5);
  }
}
.nav-links a {
  position: relative;
  padding-inline: var(--sp-2);
  padding-block: var(--sp-2);
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  color: var(--text-soft);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav-links a:hover,
.nav-links a:focus-visible { color: var(--text); }
.nav-links a:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--r-xs);
}
/* Sliding underline */
.nav-links a::after {
  content: "";
  position: absolute;
  left: var(--sp-2);
  right: var(--sp-2);
  bottom: 0;
  height: 2px;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-fast) var(--ease-out);
}
.nav-links a:hover::after,
.nav-links a:focus-visible::after { transform: scaleX(1); }


/* ============================================================
   Right cluster
   ============================================================ */
.nav-actions {
  position: relative;     /* anchors absolute listbox */
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}


/* ============================================================
   Language trigger
   ============================================================ */
.lang-trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  height: var(--btn-h-sm);
  padding-inline: var(--sp-3);
  background: var(--bg-2);
  color: var(--text-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  font-family: var(--font-sans);
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}
.lang-trigger:hover {
  border-color: var(--border-strong);
  color: var(--text);
}
.lang-trigger[aria-expanded="true"] {
  background: var(--bg-3);
  border-color: var(--border-teal);
  color: var(--text);
}
.lang-trigger:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.lang-chevron {
  flex-shrink: 0;
  transition: transform var(--dur-fast) var(--ease-out);
}
.lang-trigger[aria-expanded="true"] .lang-chevron {
  transform: rotate(180deg);
}


/* ============================================================
   Listbox panel
   ============================================================ */
.lang-listbox {
  position: absolute;
  right: 0;
  top: calc(100% + var(--sp-2));
  min-width: 220px;
  margin: 0;
  padding-block: var(--sp-2);
  padding-inline: 0;
  list-style: none;
  background: var(--bg-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-modal);
  font-size: var(--fs-body-sm);
  color: var(--text-soft);
}
/* Display rule — uses :not([hidden]) so we can animate in without
   fighting the [hidden] attribute (see §7.1 impl note #2). */
.lang-listbox { display: none; }
.lang-listbox:not([hidden]) {
  display: block;
  animation: lang-listbox-in var(--dur-normal) var(--ease-out);
}
@keyframes lang-listbox-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Options */
.lang-listbox [role="option"] {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  padding-inline: var(--sp-4);
  padding-block: var(--sp-2);
  margin-inline: var(--sp-2);
  border-radius: var(--r-sm);
  cursor: pointer;
  color: var(--text-soft);
  /* Inset box-shadow used for roving focus highlight (set below) */
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}
.lang-listbox [role="option"]:hover {
  background: var(--bg-3);
  color: var(--text);
}
/* Roving focus indicator — bg-3 + 2px teal inset left border via box-shadow.
   Distinct from plain hover (which is bg-3 only, no left border).
   :focus, NOT :focus-visible — listbox uses arrow keys, focus must always show. */
.lang-listbox [role="option"]:focus {
  outline: none;
  background: var(--bg-3);
  color: var(--text);
  box-shadow: inset 2px 0 0 var(--teal);
}
/* Selected option: bold + checkmark glyph */
.lang-listbox [role="option"][aria-selected="true"] {
  color: var(--text);
  font-weight: var(--fw-semibold);
}
.lang-listbox [role="option"][aria-selected="true"]::after {
  content: "✓";
  color: var(--teal);
  font-weight: var(--fw-bold);
  margin-inline-start: var(--sp-3);
}


/* ============================================================
   Primary CTA — nav variant (text + arrow, not App Store badge)
   ============================================================ */
.cta-primary--nav {
  display: none;
}
@media (min-width: 768px) {
  .cta-primary--nav {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    height: var(--btn-h-sm);
    padding-inline: var(--sp-4);
    background: var(--teal);
    color: var(--text-on-teal);
    border-radius: var(--r-md);
    font-family: var(--font-sans);
    font-size: var(--fs-body-sm);
    font-weight: var(--fw-semibold);
    text-decoration: none;
    white-space: nowrap;
    transition: background var(--dur-fast) var(--ease-out),
                box-shadow var(--dur-fast) var(--ease-out);
  }
  .cta-primary--nav:hover {
    background: var(--teal-hover);
    box-shadow: var(--glow-teal-sm);
  }
  .cta-primary--nav:active { background: var(--teal-active); }
  .cta-primary--nav:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
  }
}


/* ============================================================
   Hamburger
   ============================================================ */
.nav-hamburger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--btn-h-sm);
  height: var(--btn-h-sm);
  padding: 0;
  background: transparent;
  color: var(--text);
  border: 0;
  border-radius: var(--r-sm);
  cursor: pointer;
}
.nav-hamburger:hover { color: var(--teal); }
.nav-hamburger:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
@media (min-width: 1024px) {
  .nav-hamburger { display: none; }
}


/* ============================================================
   Mobile slide-in panel
   ============================================================ */
.nav-mobile-panel {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-modal) - 1);   /* below sticky CTA's z-sticky umbrella but above page */
  padding-block-start: calc(var(--nav-h-mobile) + var(--sp-5));
  padding-block-end: calc(var(--btn-h-lg) + var(--sp-7));
  padding-inline: var(--gutter-mobile);
  background: var(--bg-base);
  transform: translateX(100%);
  transition: transform var(--dur-normal) var(--ease-out);
}
.nav-mobile-panel { display: none; }
.nav-mobile-panel:not([hidden]) { display: block; }
.nav-mobile-panel.is-open { transform: translateX(0); }
.nav-mobile-panel nav {
  display: flex;
  flex-direction: column;
}
.nav-mobile-panel a {
  display: block;
  padding-block: var(--sp-4);
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  color: var(--text);
  text-decoration: none;
  border-block-end: 1px solid var(--border-soft);
}
.nav-mobile-panel a:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--r-xs);
}
.nav-mobile-panel a:hover { color: var(--teal); }
@media (min-width: 1024px) {
  .nav-mobile-panel { display: none !important; }
}


/* ============================================================
   Sticky-bottom mobile CTA
   ============================================================ */
.sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-sticky);
  padding: var(--sp-4) var(--gutter-mobile) calc(var(--sp-4) + env(safe-area-inset-bottom, 0px));
  background: linear-gradient(to top, var(--bg-base) 60%, color-mix(in srgb, var(--bg-base) 0%, transparent));
  pointer-events: none;   /* let scroll pass through the gradient */
}
.sticky-cta .cta-primary--sticky { pointer-events: auto; }
.cta-primary--sticky {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: var(--btn-h-lg);
  padding-inline: var(--sp-5);
  background: var(--teal);
  color: var(--text-on-teal);
  border-radius: var(--r-md);
  font-family: var(--font-sans);
  font-size: var(--fs-body-lg);
  font-weight: var(--fw-semibold);
  text-decoration: none;
  white-space: nowrap;
  box-shadow: var(--glow-teal-sm);
  transition: background var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}
.cta-primary--sticky:hover { background: var(--teal-hover); box-shadow: var(--glow-teal); }
.cta-primary--sticky:active { background: var(--teal-active); }
.cta-primary--sticky:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
@media (min-width: 768px) {
  .sticky-cta { display: none; }
}