/* ============================================================================
   nav.css — Cinematic navigation layer (additive; marketing pages only).
   Scoped to new classes so it never affects dashboard/admin/docs.
   Reuses tokens.css variables only.
   ============================================================================ */

/* ---- Scroll progress bar (top hairline) -------------------------------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--lime), var(--violet));
  box-shadow: 0 0 12px var(--lime-shadow);
  z-index: calc(var(--z-nav) + 1);
  pointer-events: none;
  will-change: transform;
}

/* ---- Menu toggle (bracket / hamburger) --------------------------------- */
.nav-menu-toggle {
  --bar: 2px;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 38px;
  padding: 0 14px 0 12px;
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-pill);
  background: var(--canvas-paper);
  font-family: var(--font-mono);
  font-size: var(--t-mono-sm);
  color: var(--ink);
  cursor: pointer;
  transition: border-color 0.3s var(--ease-out-cubic), transform 0.3s var(--ease-out-back),
    background 0.3s var(--ease-out-cubic);
}
.nav-menu-toggle:hover {
  border-color: var(--lime-deep);
  background: var(--canvas);
}
.nav-menu-toggle .nmt-bars {
  position: relative;
  width: 18px;
  height: 12px;
  flex: none;
}
.nav-menu-toggle .nmt-bars i {
  position: absolute;
  left: 0;
  width: 100%;
  height: var(--bar);
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.45s var(--ease-out-expo), opacity 0.3s, width 0.45s var(--ease-out-expo);
}
.nav-menu-toggle .nmt-bars i:nth-child(1) { top: 0; }
.nav-menu-toggle .nmt-bars i:nth-child(2) { top: 5px; width: 70%; }
.nav-menu-toggle .nmt-bars i:nth-child(3) { top: 10px; }
.nav-menu-toggle .nmt-label { letter-spacing: 0.06em; text-transform: uppercase; }
/* open state → X */
body.nav-open .nav-menu-toggle .nmt-bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
body.nav-open .nav-menu-toggle .nmt-bars i:nth-child(2) { opacity: 0; width: 0; }
body.nav-open .nav-menu-toggle .nmt-bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ---- Full-screen cinematic overlay menu -------------------------------- */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  background: var(--surface-dark);
  color: #f4f4ee;
  opacity: 0;
  visibility: hidden;
  clip-path: inset(0 0 100% 0);
  transition: clip-path 0.7s var(--ease-out-expo), opacity 0.4s ease, visibility 0s linear 0.7s;
}
body.nav-open .nav-overlay {
  opacity: 1;
  visibility: visible;
  clip-path: inset(0 0 0% 0);
  transition: clip-path 0.8s var(--ease-out-expo), opacity 0.3s ease, visibility 0s;
}
/* faint grid + grain inside overlay */
.nav-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 70% at 30% 30%, #000 30%, transparent 100%);
  pointer-events: none;
}

.nav-overlay-head {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px clamp(20px, 4vw, 56px);
  z-index: 6; /* above links + preview pane so the close button is always clickable */
}
.nav-overlay-head .ov-close { position: relative; z-index: 7; }
.nav-overlay-head .ov-brand {
  font-family: var(--font-mono);
  font-size: var(--t-mono);
  color: var(--lime);
  letter-spacing: 0.04em;
}
.nav-overlay-head .ov-close {
  font-family: var(--font-mono);
  font-size: var(--t-mono-sm);
  color: #f4f4ee;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  cursor: pointer;
  transition: border-color 0.3s, color 0.3s, background 0.3s;
}
.nav-overlay-head .ov-close:hover { border-color: var(--lime); color: var(--lime); }

/* left: link list */
.nav-overlay-links {
  align-self: center;
  padding: clamp(72px, 11vh, 120px) clamp(28px, 6vw, 110px) 84px;
  position: relative;
  z-index: 2;
}
.ov-link-grid {
  display: grid;
  grid-template-columns: repeat(2, max-content);
  column-gap: clamp(48px, 7vw, 110px);
  row-gap: clamp(4px, 0.8vh, 10px);
}
.ov-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--t-mono-sm);
  color: rgba(244, 244, 238, 0.45);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin-bottom: 18px;
}
.ov-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 14px;
  width: fit-content;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.2vw, 2.9rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: #f4f4ee;
  text-decoration: none;
  /* per-letter reveal handled by GSAP; start hidden via inline opacity in JS */
  transition: color 0.3s var(--ease-out-cubic);
}
.ov-link .ov-idx {
  font-family: var(--font-mono);
  font-size: var(--t-mono-sm);
  font-weight: 600;
  color: var(--lime);
  opacity: 0.6;
  transform: translateY(-0.4em);
}
.ov-link .ov-text { position: relative; }
.ov-link .ov-text::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0.08em;
  width: 0;
  height: 2px;
  background: var(--lime);
  box-shadow: 0 0 12px var(--lime-shadow);
  transition: width 0.4s var(--ease-out-expo);
}
.ov-link:hover { color: #fff; }
.ov-link:hover .ov-text::after,
.ov-link.is-active .ov-text::after { width: 100%; }
.ov-link.dim { color: rgba(244, 244, 238, 0.32); }

.nav-overlay-foot {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  align-items: center;
  padding: 22px clamp(28px, 6vw, 110px);
  font-family: var(--font-mono);
  font-size: var(--t-mono-sm);
  color: rgba(244, 244, 238, 0.55);
  z-index: 2;
}
.nav-overlay-foot a { color: rgba(244, 244, 238, 0.8); }
.nav-overlay-foot a:hover { color: var(--lime); }
.nav-overlay-foot .ov-tg {
  margin-left: auto;
  color: var(--surface-dark);
  background: var(--lime);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-weight: 600;
}

/* right: preview pane */
.nav-overlay-preview {
  position: relative;
  overflow: hidden;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  display: grid;
  place-items: center;
  z-index: 2;
}
.ov-preview-card {
  position: absolute;
  inset: clamp(40px, 8vh, 90px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-hero);
  background: linear-gradient(160deg, rgba(199, 248, 72, 0.08), rgba(123, 92, 255, 0.08));
  display: grid;
  place-content: center;
  text-align: center;
  gap: 14px;
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 0.45s var(--ease-out-cubic), transform 0.45s var(--ease-out-expo);
}
.ov-preview-card.show { opacity: 1; transform: scale(1); }
.ov-preview-glyph {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 9rem);
  color: var(--lime);
  text-shadow: 0 0 40px var(--lime-shadow);
  line-height: 1;
}
.ov-preview-title { font-family: var(--font-sans); font-weight: 600; font-size: var(--t-heading-3); }
.ov-preview-desc {
  font-family: var(--font-mono);
  font-size: var(--t-mono-sm);
  color: rgba(244, 244, 238, 0.55);
  max-width: 30ch;
  margin: 0 auto;
}

/* ---- Mega-panel: override the legacy sections.css grid (which squished the
   inner content into a single 25% column) → a centered, contained panel ---- */
.mega-panel {
  display: block !important;
  left: 50% !important;
  right: auto !important;
  transform: translateX(-50%) translateY(-8px);
  width: min(960px, 94vw);
  padding: 0;
  border: 1px solid var(--ink-line);
  border-radius: 0 0 var(--radius-module) var(--radius-module);
  background: var(--canvas-paper);
  box-shadow: var(--shadow-3);
  overflow: hidden;
}
.mega-panel.open { transform: translateX(-50%) translateY(0); }

.mega-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; padding: 18px; }
.mega-card {
  display: block;
  padding: 14px;
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-chip);
  background: var(--canvas-paper);
  text-decoration: none;
  color: var(--ink);
  opacity: 0;
  transform: translateY(8px);
  transition: border-color 0.3s var(--ease-out-cubic), transform 0.3s var(--ease-out-expo),
    box-shadow 0.3s;
}
.mega-panel.open .mega-card { opacity: 1; transform: translateY(0); }
.mega-card:hover { border-color: var(--lime-deep); box-shadow: var(--shadow-2); transform: translateY(-2px); }
.mega-card .mc-icon {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--lime-deep);
  display: block;
  margin-bottom: 8px;
}
.mega-card .mc-title { font-weight: 600; font-size: var(--t-body-sm); }
.mega-card .mc-desc { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-mute); margin-top: 4px; line-height: 1.4; }

/* ---- Responsive -------------------------------------------------------- */
@media (max-width: 760px) {
  .nav-overlay { grid-template-columns: 1fr; }
  .nav-overlay-preview { display: none; }
  .nav-overlay-links { padding-top: clamp(88px, 14vh, 150px); padding-bottom: 110px; }
  .ov-link-grid { grid-template-columns: 1fr; row-gap: 4px; }
  .nav-overlay-foot { font-size: 0.72rem; gap: 10px 16px; }
}
/* Menu toggle: show "MENU" label on desktop, hamburger-only on small */
@media (max-width: 560px) {
  .nav-menu-toggle .nmt-label { display: none; }
  .nav-menu-toggle { padding: 0 12px; }
}

/* Lock scroll when overlay open */
body.nav-open { overflow: hidden; }

@media (prefers-reduced-motion: reduce) {
  .nav-overlay,
  .nav-overlay *,
  .scroll-progress { transition-duration: 0.001ms !important; }
}