/* ============================================================
   CATBACK nav — retro OS toolbar + full-screen terminal menu.
   Owns ALL styling for #site-nav and #mobile-menu.
   ============================================================ */

/* ---------------- toolbar shell ---------------- */

.site-nav {
  --nav-slim-h: 34px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 18px);
  padding: 0 clamp(10px, 2.2vw, 24px);
  /* BRANCH SIGNAGE: the toolbar is a sign board fixed above the
     entrance — opaque stone-cream face, a brass hairline along the
     bottom edge and a soft cast shadow onto the wall behind. */
  background-color: var(--ink-2);
  border-bottom: var(--px) solid var(--forest-2);
  box-shadow:
    inset 0 var(--px) 0 var(--ink-3),
    inset 0 calc(-3 * var(--px)) 0 calc(-1 * var(--px)) var(--brass),
    0 6px 16px var(--shade-soft),
    0 0 14px var(--glow-soft);
  transition:
    height var(--dur-med) var(--ease-mech),
    background-color var(--dur-med) var(--ease-mech),
    border-color var(--dur-med) var(--ease-mech);
}

/* slim state stays legible over the detailed room — it dims, never
   dissolves (the old 55% wash let wall texture through the labels) */
.site-nav[data-state="slim"] {
  height: var(--nav-slim-h);
  background-color: var(--ink);
  background-color: color-mix(in srgb, var(--ink) 92%, transparent);
  border-bottom-color: var(--forest-2);
}

/* ---------------- brand ---------------- */

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-pixel);
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--terminal-soft);
  white-space: nowrap;
  transform-origin: left center;
  transition: transform var(--dur-med) var(--ease-mech), color var(--dur-fast) var(--ease-snap);
}
.nav-brand:hover { color: var(--terminal); }
.nav-brand-note {
  width: 24px;
  height: auto;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}
.site-nav[data-state="slim"] .nav-brand { transform: scale(0.88); }

/* ---------------- center links ---------------- */

.nav-main {
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: center;
}
.nav-main,
.nav-social {
  transition:
    opacity var(--dur-med) var(--ease-mech),
    transform var(--dur-med) var(--ease-mech),
    visibility var(--dur-med);
}
.site-nav[data-state="slim"] .nav-main,
.site-nav[data-state="slim"] .nav-social {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  pointer-events: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.7vw, 24px);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  display: inline-block;
  font-family: var(--font-term);
  font-size: 18px;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--terminal-soft);
  padding: 6px 2px;
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease-snap), text-shadow var(--dur-fast) var(--ease-snap);
}
/* reserved-width marker: no layout shift when it lights up */
.nav-links a::before {
  content: '▸ ';
  color: var(--terminal);
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease-snap);
}
.nav-links a:hover {
  color: var(--terminal);
  text-shadow: 0 0 10px var(--glow-terminal);
}
.nav-links a[aria-current="true"] {
  color: var(--terminal);
  text-shadow: 0 0 8px var(--glow-soft);
}
.nav-links a[aria-current="true"]::before { opacity: 1; }

/* ---------------- social chips ---------------- */

.nav-social {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-term);
  font-size: 15px;
  line-height: 1.3;
  letter-spacing: 1px;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--terminal);
  background: var(--ink-3);
  border: var(--px) solid var(--forest-2);
  padding: 2px 8px;
  transition:
    transform var(--dur-fast) var(--ease-snap),
    box-shadow var(--dur-fast) var(--ease-snap),
    color var(--dur-fast) var(--ease-snap);
}
a.nav-chip:hover {
  color: var(--sol-cyan);
  transform: translateY(-1px);
  box-shadow: 0 0 10px var(--glow-soft);
}
.nav-chip.is-tba {
  color: var(--terminal-dim);
  border-color: var(--forest);
  cursor: not-allowed;
}
.nav-chip.is-tba i {
  font-style: normal;
  font-size: 12px;
  padding: 0 4px;
  color: var(--amber);
  background: var(--forest);
}

/* ---------------- burger ---------------- */

.nav-burger {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 12px;
  margin-left: auto;
  background: var(--ink-3);
  color: var(--terminal);
  border: var(--px) solid var(--forest-2);
  font-family: var(--font-pixel);
  font-size: 10px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-snap), box-shadow var(--dur-fast) var(--ease-snap);
}
.nav-burger:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 10px var(--glow-soft);
}
/* pixel "bars" icon: three 2px lines */
.nav-burger-bars {
  width: 14px;
  height: 14px;
  background: repeating-linear-gradient(
    0deg,
    var(--terminal) 0 var(--px),
    transparent var(--px) 6px
  );
}
/* slim mode keeps MENU reachable even on desktop, compacted to fit */
.site-nav[data-state="slim"] .nav-burger {
  display: inline-flex;
  min-height: 26px;
  padding: 3px 9px;
  font-size: 9px;
}

/* ---------------- breakpoints ---------------- */

@media (min-width: 900px) and (max-width: 1120px) {
  .nav-links a { font-size: 16px; }
  .nav-chip { font-size: 13px; }
}

/* Brand + six links + four social chips need ~1260px. Below that the centered
   link row overflows its track and collides with both neighbours.
   1120-1279: drop the decorative TBA tag so the chips fit (the sr-only
   "link to be announced" and aria-disabled carry the meaning either way).
   900-1119: no room at all — the chips move into the menu, which already
   carries them, and the burger comes back so they stay reachable. */
@media (min-width: 1180px) and (max-width: 1279.98px) {
  .nav-chip i { display: none; }
}

@media (min-width: 900px) and (max-width: 1179.98px) {
  .nav-social { display: none; }
  .nav-burger { display: inline-flex; }
}

@media (max-width: 899.98px) {
  .site-nav { --nav-slim-h: 46px; }
  .nav-main,
  .nav-social { display: none; }
  .nav-burger { display: inline-flex; }
  .site-nav[data-state="slim"] .nav-burger {
    min-height: 40px;
    padding: 8px 12px;
    font-size: 10px;
  }
}

/* ---------------- mobile terminal menu ---------------- */

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  display: flex;
  flex-direction: column;
  padding: 16px 18px 100px; /* bottom clearance for the fixed audio toggle */
  overflow-y: auto;
  overflow-x: hidden;
  background:
    repeating-linear-gradient(0deg, transparent 0 2px, var(--scanline) 2px 4px),
    linear-gradient(180deg, var(--ink-2), var(--ink));
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--dur-med) var(--ease-snap), transform var(--dur-med) var(--ease-snap);
}
.mobile-menu[data-open="true"] {
  opacity: 1;
  transform: none;
}
.mobile-menu[hidden] { display: none !important; }

/* body scroll lock while the menu dialog is open */
body.cb-menu-lock { overflow: hidden; }

.mm-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: var(--px) solid var(--forest-2);
}
.mm-title {
  font-family: var(--font-pixel);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--terminal-dim);
}
.mm-close {
  min-height: 44px;
  padding: 10px 14px;
  background: var(--ink-3);
  color: var(--terminal);
  border: var(--px) solid var(--forest-2);
  font-family: var(--font-pixel);
  font-size: 10px;
  letter-spacing: 1px;
  cursor: pointer;
}
.mm-close:hover { color: var(--sol-cyan); }

.mm-nav ul {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mm-link {
  display: flex;
  align-items: center;
  gap: 2px;
  min-height: 52px;
  padding: 6px 4px;
  font-family: var(--font-term);
  font-size: clamp(28px, 7vw, 42px);
  line-height: 1.05;
  text-transform: uppercase;
  color: var(--terminal-soft);
  transition: color var(--dur-fast) var(--ease-snap), text-shadow var(--dur-fast) var(--ease-snap);
}
.mm-prefix { color: var(--terminal-dim); }
.mm-link:hover,
.mm-link:hover .mm-prefix {
  color: var(--terminal);
  text-shadow: 0 0 12px var(--glow-terminal);
}
.mm-link[aria-current="true"],
.mm-link[aria-current="true"] .mm-prefix {
  color: var(--terminal);
}
/* blinking block caret while an entry is typing in */
.mm-link.is-typing .mm-text::after {
  content: '▮';
  margin-left: 2px;
  color: var(--terminal);
  animation: cb-mm-caret 0.8s steps(1, end) infinite;
}
@keyframes cb-mm-caret {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.mm-foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 26px;
}
.mm-social {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.mm-social .nav-chip {
  font-size: 19px;
  padding: 8px 14px;
  min-height: 40px;
}
.mm-ca-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.mm-ca-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  font-family: var(--font-term);
  font-size: 19px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--terminal);
  background: var(--ink-3);
  border: var(--px) solid var(--forest-2);
  cursor: pointer;
}
.mm-ca-chip.is-tba {
  color: var(--terminal-dim);
  border-color: var(--forest);
  cursor: not-allowed;
}
.mm-ca-feedback {
  font-family: var(--font-term);
  font-size: 18px;
  color: var(--amber);
  min-height: 1em;
}

/* ============================================================
   post-launch polish (additive only — no behavior/breakpoint
   changes above this line were made).
   ============================================================ */

/* ----- 1px energy line under the toolbar ---------------------
   Hue drifts between green and cyan over ~20s; gradient position
   and opacity only. */
.site-nav::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(-1 * var(--px));
  height: 1px;
  background: linear-gradient(90deg,
    var(--c-emerald) 0%, var(--gold) 35%,
    var(--c-emerald) 65%, var(--gold) 100%);
  background-size: 320% 100%;
  opacity: 0.55;
  pointer-events: none;
  animation: cb-nav-energy 20s var(--ease-mech) infinite alternate;
}
@keyframes cb-nav-energy {
  0%   { background-position: 0% 0;   opacity: 0.35; }
  50%  { background-position: 50% 0;  opacity: 0.6;  }
  100% { background-position: 100% 0; opacity: 0.35; }
}

/* ----- faint scanline texture on the slim bar ----- */
.site-nav::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg, transparent 0 2px, var(--scanline) 2px 4px);
  opacity: 0;
  transition: opacity var(--dur-med) var(--ease-mech);
  pointer-events: none;
}
.site-nav[data-state="slim"]::before { opacity: 0.6; }

/* ----- stepped underline tick on link hover -----
   2px pixel dashes revealed in chunky steps (clip on a 2px strip,
   paint-only). */
.nav-links a { position: relative; }
.nav-links a::after {
  content: '';
  position: absolute;
  left: 2px;
  right: 2px;
  bottom: 1px;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--terminal) 0 5px, transparent 5px 9px);
  opacity: 0;
  clip-path: inset(0 100% 0 0);
  transition: clip-path 160ms steps(6, end), opacity var(--dur-fast) var(--ease-snap);
  pointer-events: none;
}
.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  opacity: 1;
  clip-path: inset(0 0 0 0);
}

/* ----- brand note: tiny 2-frame tilt on hover ----- */
.nav-brand:hover .nav-brand-note,
.nav-brand:focus-visible .nav-brand-note {
  animation: cb-brand-tilt 0.42s steps(1, end) infinite;
}
@keyframes cb-brand-tilt {
  0%, 100% { transform: rotate(0deg); }
  50%      { transform: rotate(-7deg); }
}

/* ----- active-section marker: soft glow pulse (opacity only) ----- */
.nav-links a[aria-current="true"]::before {
  text-shadow: 0 0 7px var(--glow-terminal);
  animation: cb-active-pulse 2.4s var(--ease-mech) infinite;
}
@keyframes cb-active-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}

/* ----- terminal menu: prefix nudge on hover/focus ----- */
.mm-link .mm-prefix {
  display: inline-block;
  transition: transform var(--dur-fast) steps(2, end);
}
.mm-link:hover .mm-prefix,
.mm-link:focus-visible .mm-prefix { transform: translateX(6px); }

/* ----- terminal menu: drifting pixel motes (CSS only) -----
   Square pixels via 0-blur box-shadows on tiny pseudo layers,
   z:-1 keeps them under the menu content but over its bg. */
.mobile-menu::before,
.mobile-menu::after {
  content: '';
  position: absolute;
  z-index: -1;
  top: 0;
  left: 0;
  width: 3px;
  height: 3px;
  background: transparent;
  pointer-events: none;
  opacity: 0.4;
}
.mobile-menu::before {
  box-shadow:
    8vw 18vh 0 var(--terminal-dim), 24vw 66vh 0 var(--forest-2),
    37vw 32vh 0 var(--moss),        52vw 78vh 0 var(--terminal-dim),
    66vw 22vh 0 var(--forest-2),    81vw 58vh 0 var(--terminal-dim),
    91vw 84vh 0 var(--moss),        14vw 88vh 0 var(--forest-2);
  animation: cb-mote-a 24s ease-in-out infinite alternate;
}
.mobile-menu::after {
  width: 2px;
  height: 2px;
  box-shadow:
    12vw 44vh 0 var(--forest-2), 30vw 12vh 0 var(--terminal-dim),
    47vw 56vh 0 var(--forest-2), 61vw 90vh 0 var(--moss),
    74vw 38vh 0 var(--forest-2), 88vw 14vh 0 var(--terminal-dim);
  animation: cb-mote-b 32s ease-in-out infinite alternate;
}
@keyframes cb-mote-a {
  from { transform: translateY(0); }
  to   { transform: translateY(-26px); }
}
@keyframes cb-mote-b {
  from { transform: translateY(0); }
  to   { transform: translateY(18px); }
}

/* ----- terminal menu: REPLAY INTRO entry (injected by nav.js) ----- */
.mm-replay {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 16px;
  background: var(--ink-3);
  color: var(--gold);
  border: var(--px) solid var(--forest-2);
  font-family: var(--font-pixel);
  font-size: 10px;
  letter-spacing: 1px;
  cursor: pointer;
  transition:
    transform var(--dur-fast) var(--ease-snap),
    color var(--dur-fast) var(--ease-snap),
    box-shadow var(--dur-fast) var(--ease-snap);
}
.mm-replay:hover,
.mm-replay:focus-visible {
  color: var(--sol-cyan);
  transform: translateY(-1px);
  box-shadow: 0 0 10px var(--glow-soft);
}

/* ----- reduced motion -----
   base.css's body[data-motion="reduce"] gate freezes all of the
   above; these rules also hide the motes entirely and cover the
   pre-boot paint via the media query. :not([data-motion="full"])
   keeps the ?motion=full testing override working. */
body[data-motion="reduce"] .mobile-menu::before,
body[data-motion="reduce"] .mobile-menu::after { display: none; }
body[data-motion="reduce"] .site-nav::after,
body[data-motion="reduce"] .nav-brand:hover .nav-brand-note,
body[data-motion="reduce"] .nav-brand:focus-visible .nav-brand-note,
body[data-motion="reduce"] .nav-links a[aria-current="true"]::before { animation: none; }

@media (prefers-reduced-motion: reduce) {
  body:not([data-motion="full"]) .mobile-menu::before,
  body:not([data-motion="full"]) .mobile-menu::after { display: none; }
  body:not([data-motion="full"]) .site-nav::after,
  body:not([data-motion="full"]) .nav-brand:hover .nav-brand-note,
  body:not([data-motion="full"]) .nav-brand:focus-visible .nav-brand-note,
  body:not([data-motion="full"]) .nav-links a[aria-current="true"]::before { animation: none; }
}