/* ==========================================================================
   reidEXA — site.css
   Shared foundation for all pages.
   May 5, 2026: dimensional refactor — adds gradient/grain/elevation/glass
   primitives. All additions are token-driven so individual pages opt in
   via existing class hooks; no breaking change to consumers.
   ========================================================================== */
@font-face {
  font-family: 'Geist Fallback';
  src: local('Arial');
  size-adjust: 105%;
  ascent-override: 90%;
  descent-override: 22%;
  line-gap-override: 0%;
}

@font-face {
  font-family: 'Inter Tight Fallback';
  src: local('Arial');
  size-adjust: 102%;
  ascent-override: 92%;
  descent-override: 23%;
  line-gap-override: 0%;
}

:root {
  
  /* Type */
  --display: 'Geist', 'Geist Fallback', system-ui, sans-serif;
  --sans: 'Inter Tight', 'Inter Tight Fallback', system-ui, sans-serif;
  --mono: 'JetBrains Mono', monospace;

  /* ------------------------------------------------------------------------
     Color — HSL channel components (alpha overlays via hsl(var(--*-hsl) / a))
     ------------------------------------------------------------------------ */
  --midnight-hsl: 216 48% 11%;
  --midnight-2-hsl: 218 32% 15%;
  --midnight-3-hsl: 219 37% 21%;
  --midnight-4-hsl: 214 29% 25%;
  --electric-hsl: 212 74% 52%;
  --electric-soft-hsl: 212 77% 60%;
  --slate-hsl: 212 24% 31%;
  --slate-light-hsl: 210 27% 54%;
  --slate-dim-hsl: 212 28% 65%;
  --cloud-hsl: 213 31% 93%;
  --paper-hsl: 216 33% 97%;
  --white-hsl: 0 0% 100%;

  /* Color — Midnight family */
  --midnight: hsl(var(--midnight-hsl));
  --midnight-2: hsl(var(--midnight-2-hsl));
  --midnight-3: hsl(var(--midnight-3-hsl));
  --midnight-4: hsl(var(--midnight-4-hsl));

  /* Color — Electric accent */
  --electric: hsl(var(--electric-hsl));
  --electric-soft: hsl(var(--electric-soft-hsl));

  /* Color — Slate text family */
  --slate: hsl(var(--slate-hsl));
  --slate-light: hsl(var(--slate-light-hsl));
  --slate-dim: hsl(var(--slate-dim-hsl));

  /* Color — Surface family */
  --cloud: hsl(var(--cloud-hsl));
  --paper: hsl(var(--paper-hsl));
  --white: hsl(var(--white-hsl));

  /* ------------------------------------------------------------------------
     Elevation tokens — M3-inspired triple-shadow stack (umbra/penumbra/ambient)
     Tuned to the Midnight palette so dark sections carry depth, not just glow.
     Use as: box-shadow: var(--elev-2);
     ------------------------------------------------------------------------ */
  --elev-0: none;
  --elev-1:
    0 1px 1px hsl(var(--midnight-hsl) / 0.06),
    0 1px 2px hsl(var(--midnight-hsl) / 0.08),
    0 0 0 1px hsl(var(--midnight-hsl) / 0.02);
  --elev-2:
    0 1px 2px hsl(var(--midnight-hsl) / 0.08),
    0 4px 12px hsl(var(--midnight-hsl) / 0.10),
    0 0 0 1px hsl(var(--midnight-hsl) / 0.03);
  --elev-3:
    0 2px 4px hsl(var(--midnight-hsl) / 0.08),
    0 12px 28px hsl(var(--midnight-hsl) / 0.14),
    0 0 0 1px hsl(var(--midnight-hsl) / 0.04);
  --elev-4:
    0 4px 8px hsl(var(--midnight-hsl) / 0.10),
    0 24px 48px hsl(var(--midnight-hsl) / 0.18),
    0 0 0 1px hsl(var(--midnight-hsl) / 0.05);

  /* Dark-section elevation — for cards living over Midnight surfaces */
  --elev-dark-1:
    0 1px 1px hsl(0 0% 0% / 0.18),
    0 1px 2px hsl(0 0% 0% / 0.22);
  --elev-dark-2:
    0 1px 2px hsl(0 0% 0% / 0.22),
    0 8px 20px hsl(0 0% 0% / 0.32);
  --elev-dark-3:
    0 2px 4px hsl(0 0% 0% / 0.24),
    0 18px 40px hsl(0 0% 0% / 0.42);

  /* ------------------------------------------------------------------------
     Dimensional border — 1px translucent inner border that simulates light
     catching a bevel. Light variant for dark surfaces, dark variant for light.
     Apply as inset box-shadow alongside elevation (composable).
     ------------------------------------------------------------------------ */
  --bevel-light: inset 0 1px 0 hsl(var(--white-hsl) / 0.06);
  --bevel-light-strong: inset 0 1px 0 hsl(var(--white-hsl) / 0.10);
  --bevel-dark: inset 0 1px 0 hsl(var(--midnight-hsl) / 0.04);

  /* ------------------------------------------------------------------------
     Glass surface — restrained backdrop blur with high-transparency tint.
     Pair with --bevel-* and a faint border for the precision feel.
     ------------------------------------------------------------------------ */
  --glass-blur: saturate(140%) blur(14px);
  --glass-tint-light: hsl(var(--white-hsl) / 0.62);
  --glass-tint-dark: hsl(var(--midnight-2-hsl) / 0.62);
  --glass-edge-light: hsl(var(--white-hsl) / 0.10);
  --glass-edge-dark: hsl(var(--midnight-4-hsl) / 0.55);

  /* ------------------------------------------------------------------------
     Atmospheric backgrounds — subtle layered radials, restrained amplitude.
     The mesh sits at the body level; sections re-use it via ::before overlays.
     ------------------------------------------------------------------------ */
  --mesh-light:
    radial-gradient(1100px 720px at 12% -10%,
      hsl(var(--electric-hsl) / 0.06), transparent 60%),
    radial-gradient(900px 600px at 100% 0%,
      hsl(var(--electric-soft-hsl) / 0.04), transparent 55%),
    radial-gradient(1200px 800px at 60% 100%,
      hsl(var(--cloud-hsl) / 0.55), transparent 60%),
    linear-gradient(180deg, var(--white) 0%, var(--paper) 60%, var(--white) 100%);

  --mesh-dark:
    radial-gradient(900px 620px at 8% 0%,
      hsl(var(--electric-hsl) / 0.10), transparent 60%),
    radial-gradient(1100px 760px at 100% 100%,
      hsl(var(--midnight-3-hsl) / 0.85), transparent 55%),
    radial-gradient(700px 500px at 50% -10%,
      hsl(var(--electric-soft-hsl) / 0.05), transparent 60%),
    linear-gradient(180deg, var(--midnight) 0%, var(--midnight-2) 100%);

  /* Vignette spotlight — used to focus the eye toward central content */
  --vignette-light:
    radial-gradient(120% 80% at 50% 0%,
      transparent 40%, hsl(var(--midnight-hsl) / 0.03) 100%);
  --vignette-dark:
    radial-gradient(120% 80% at 50% 0%,
      transparent 40%, hsl(0 0% 0% / 0.18) 100%);

  /* ------------------------------------------------------------------------
     Motion + radius tokens — small set, used by the new tactile interactions
     ------------------------------------------------------------------------ */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 160ms;
  --dur-base: 220ms;
  --dur-slow: 360ms;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;
}

/* ==========================================================================
   Reset & base
   ========================================================================== */

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--midnight);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-weight: 400;
  /* tighter typographic rhythm for premium feel */
  text-rendering: optimizeLegibility;
  font-feature-settings: 'kern', 'ss01', 'cv11';
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ==========================================================================
   Atmospheric foundation — applied to <body> on every page automatically.
   Two pseudo-element layers compose the mesh gradient + grain overlay.
   No markup change required; opt-out by adding .no-atmosphere to <body>.
   ========================================================================== */

body::before {
  /* Mesh gradient layer — light theme by default */
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background: var(--mesh-light);
  pointer-events: none;
}

body::after {
  /* Fine-grain noise overlay — SVG fractalNoise, ~3% opacity, ~140px tile */
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.06  0 0 0 0 0.10  0 0 0 0 0.18  0 0 0 1 0'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
  background-size: 160px 160px;
  mix-blend-mode: multiply;
}

body.no-atmosphere::before,
body.no-atmosphere::after { display: none; }

/* Dark-themed body — opt in by adding .theme-dark to <body> */
body.theme-dark { background: var(--midnight); color: var(--white); }
body.theme-dark::before { background: var(--mesh-dark); }
body.theme-dark::after {
  opacity: 0.05;
  mix-blend-mode: screen;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.50  0 0 0 0 0.62  0 0 0 0 0.85  0 0 0 1 0'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
}

/* ==========================================================================
   Section atmospheres — utility classes for individual <section> elements
   that need a different ambient than the body. Composable.
   ========================================================================== */

.atmos-light,
.atmos-dark,
.atmos-paper {
  position: relative;
  isolation: isolate;
}
.atmos-light::before,
.atmos-dark::before,
.atmos-paper::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}
.atmos-light::before { background: var(--mesh-light); }
.atmos-dark::before  { background: var(--mesh-dark); }
.atmos-paper::before {
  background:
    radial-gradient(900px 500px at 100% 0%,
      hsl(var(--electric-hsl) / 0.04), transparent 60%),
    radial-gradient(700px 460px at 0% 100%,
      hsl(var(--cloud-hsl) / 0.70), transparent 60%),
    var(--paper);
}

/* Vignette — adds a soft inward fade. Use with .atmos-* parents. */
.vignette-light::after,
.vignette-dark::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}
.vignette-light, .vignette-dark { position: relative; isolation: isolate; }
.vignette-light::after { background: var(--vignette-light); }
.vignette-dark::after  { background: var(--vignette-dark); }

/* ==========================================================================
   Surface primitives — opt-in classes that compose elevation, bevel, glass.
   These are additive; existing card classes can include them or extend them.
   ========================================================================== */

.surface {
  background: var(--white);
  border-radius: var(--r-md);
  box-shadow: var(--elev-2), var(--bevel-dark);
  transition: box-shadow var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
}
.surface-elevated {
  background: var(--white);
  border-radius: var(--r-lg);
  box-shadow: var(--elev-3), var(--bevel-dark);
}
.surface-floating {
  background: var(--white);
  border-radius: var(--r-lg);
  box-shadow: var(--elev-4), var(--bevel-dark);
}
.surface-dark {
  background: var(--midnight-3);
  border-radius: var(--r-md);
  box-shadow: var(--elev-dark-2), var(--bevel-light);
}
.surface-dark-elevated {
  background: var(--midnight-3);
  border-radius: var(--r-lg);
  box-shadow: var(--elev-dark-3), var(--bevel-light-strong);
}

/* Glass — restrained, AA-respectful. The translucent fill sits over a
   parent surface, so contrast is determined by the parent, not the glass. */
.glass-light {
  background: var(--glass-tint-light);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-edge-light);
  box-shadow: var(--elev-2), var(--bevel-light-strong);
  border-radius: var(--r-md);
}
.glass-dark {
  background: var(--glass-tint-dark);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-edge-dark);
  box-shadow: var(--elev-dark-2), var(--bevel-light);
  border-radius: var(--r-md);
}

/* Fallback for browsers without backdrop-filter — bump opacity so contrast
   stays AA without relying on the blur. */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass-light { background: hsl(var(--white-hsl) / 0.92); }
  .glass-dark  { background: hsl(var(--midnight-2-hsl) / 0.92); }
}

/* Tactile interaction — composable hover state for any .surface-like card */
.tactile {
  transition:
    box-shadow var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out),
    background-color var(--dur-base) var(--ease-out);
}
.tactile:hover {
  transform: translateY(-2px);
  box-shadow: var(--elev-3), var(--bevel-dark);
}
.surface-dark.tactile:hover,
.surface-dark-elevated.tactile:hover {
  box-shadow: var(--elev-dark-3), var(--bevel-light-strong);
}

/* ==========================================================================
   Layout containers
   ========================================================================== */

.container { max-width: 1240px; margin: 0 auto; padding: 0 40px; position: relative; }
.container-narrow { max-width: 880px; margin: 0 auto; padding: 0 40px; position: relative; }

/* ==========================================================================
   Navigation — upgraded to a glass surface for sticky elevation, with a
   refined translucent border. Falls back to solid Midnight without backdrop.
   ========================================================================== */

.nav {
  background: hsl(var(--midnight-hsl) / 0.78);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  backdrop-filter: saturate(160%) blur(16px);
  padding: 18px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid hsl(var(--white-hsl) / 0.06);
  box-shadow:
    0 1px 0 hsl(var(--white-hsl) / 0.04) inset,
    0 8px 24px hsl(0 0% 0% / 0.18);
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .nav { background: var(--midnight); }
}
.nav-inner { display: flex; justify-content: space-between; align-items: center; }
.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-mark { width: 36px; height: 36px; }
.nav-name {
  color: var(--white);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.025em;
  font-family: var(--display);
}
.nav-name span { color: var(--electric); }
.nav-links { display: flex; gap: 34px; }
.nav-link {
  color: var(--slate-light);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.02em;
  transition: color var(--dur-fast) var(--ease-out);
  position: relative;
  padding: 6px 2px;
}
.nav-link::after {
  /* underline accent — appears on hover/active */
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 0;
  background: var(--electric);
  transition: width var(--dur-base) var(--ease-out);
}
.nav-link:hover, .nav-link.active { color: var(--white); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

/* ==========================================================================
   Section labels & titles (used across all pages)
   Slight tracking + size adjustments for a more architectural feel.
   ========================================================================== */

.section-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--electric);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}
.section-label::before {
  content: '';
  width: 24px;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--electric) 30%,
    var(--electric) 100%
  );
}

/* ==========================================================================
   Footer — matches nav glass treatment for symmetry
   ========================================================================== */

.footer {
  background: var(--midnight);
  padding: 32px 0;
  border-top: 1px solid var(--midnight-4);
  position: relative;
  isolation: isolate;
}
.footer::before {
  /* faint top-edge highlight for the bevel feel */
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    hsl(var(--white-hsl) / 0.08) 50%,
    transparent 100%
  );
  pointer-events: none;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px 24px;
}
.footer-url { font-family: var(--mono); color: var(--slate-light); font-size: 12px; }
.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  row-gap: 8px;
}
.footer-link {
  color: var(--slate-dim);
  font-size: 12px;
  transition: color var(--dur-fast) var(--ease-out);
}
.footer-link:hover { color: var(--white); }

/* ==========================================================================
   Accessibility utilities
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--electric);
  color: var(--white);
  padding: 12px 20px;
  border-radius: var(--r-sm);
  font-weight: 500;
  font-size: 14px;
  z-index: 9999;
  transition: top var(--dur-fast) var(--ease-out);
  box-shadow: var(--elev-3);
}
.skip-link:focus {
  top: 16px;
  outline: 2px solid var(--white);
  outline-offset: 2px;
}

:focus-visible {
  outline: 2px solid var(--electric);
  outline-offset: 3px;
  border-radius: 4px;
}
.nav-logo:focus-visible { outline-offset: 6px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .tactile:hover { transform: none; }
}

/* ==========================================================================
   CTA buttons — upgraded with elevation + tactile press
   ========================================================================== */

.cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 28px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--r-sm);
  letter-spacing: 0.01em;
  font-family: var(--sans);
  position: relative;
  isolation: isolate;
  transition:
    background-color var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}
.cta-primary {
  background: linear-gradient(
    180deg,
    hsl(var(--electric-soft-hsl)) 0%,
    hsl(var(--electric-hsl)) 100%
  );
  color: var(--white);
  border: 1px solid hsl(var(--electric-hsl) / 0.95);
  box-shadow:
    var(--elev-2),
    inset 0 1px 0 hsl(var(--white-hsl) / 0.18),
    inset 0 -1px 0 hsl(var(--midnight-hsl) / 0.18);
}
.cta-primary:hover {
  background: linear-gradient(
    180deg,
    hsl(var(--electric-soft-hsl)) 0%,
    hsl(var(--electric-soft-hsl)) 100%
  );
  border-color: var(--electric-soft);
  box-shadow:
    var(--elev-3),
    inset 0 1px 0 hsl(var(--white-hsl) / 0.22),
    inset 0 -1px 0 hsl(var(--midnight-hsl) / 0.18);
}
.cta-primary:active { transform: translateY(1px); box-shadow: var(--elev-1); }

.cta-secondary {
  background: hsl(var(--white-hsl) / 0.04);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: var(--white);
  border: 1px solid hsl(var(--white-hsl) / 0.20);
  box-shadow: inset 0 1px 0 hsl(var(--white-hsl) / 0.06);
}
.cta-secondary:hover {
  border-color: hsl(var(--white-hsl) / 0.45);
  background: hsl(var(--white-hsl) / 0.08);
}
.cta-secondary:active { transform: translateY(1px); }

/* ==========================================================================
   Hamburger button — hidden on desktop, shown on mobile
   ========================================================================== */

.nav-hamburger {
  display: none;            /* desktop: hidden */
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: hsl(var(--white-hsl) / 0.07);
  border: 1px solid hsl(var(--white-hsl) / 0.12);
  border-radius: var(--r-sm);
  color: var(--white);
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out);
}
.nav-hamburger:hover {
  background: hsl(var(--white-hsl) / 0.13);
  border-color: hsl(var(--white-hsl) / 0.22);
}
.nav-hamburger-icon { width: 20px; height: 20px; display: block; }

/* ==========================================================================
   Full-screen mobile overlay
   ========================================================================== */

.nav-mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  padding: 0 28px 40px;
  /* Entry animation: fade + subtle upward slide */
  opacity: 0;
  transform: translateY(12px);
  /* Closed state must not capture clicks — this is the critical fix.
     Without it, the fixed full-viewport overlay swallows every click
     across the whole site even while invisible (opacity:0). */
  pointer-events: none;
  transition:
    opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
  /* background detail — faint radial matches the site mesh */
  background:
    radial-gradient(900px 700px at 5% 0%,
      hsl(var(--electric-hsl) / 0.08), transparent 55%),
    radial-gradient(700px 500px at 95% 100%,
      hsl(var(--midnight-3-hsl) / 0.9), transparent 50%),
    var(--midnight);
}
/* Respect the `hidden` HTML attribute. A base `display: flex` rule normally
   defeats the browser's built-in [hidden]{display:none}, so we restore it
   explicitly. The overlay is fully removed from the layout when hidden. */
.nav-mobile-overlay[hidden] { display: none; }

/* Hard guard: the overlay can NEVER appear or capture clicks on desktop,
   regardless of JS state (e.g. resizing from mobile→desktop while open). */
@media (min-width: 901px) {
  .nav-mobile-overlay { display: none !important; }
}

.nav-mobile-overlay.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;   /* clickable only when open */
}
/* Scroll lock while overlay is visible */
body.nav-mobile-open { overflow: hidden; }

/* Header row inside overlay — mirrors the sticky nav */
.nav-mobile-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  border-bottom: 1px solid hsl(var(--white-hsl) / 0.07);
  margin-bottom: 12px;
  flex-shrink: 0;
}

/* Close button */
.nav-mobile-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: hsl(var(--white-hsl) / 0.07);
  border: 1px solid hsl(var(--white-hsl) / 0.12);
  border-radius: var(--r-sm);
  color: var(--white);
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out);
}
.nav-mobile-close:hover {
  background: hsl(var(--white-hsl) / 0.13);
  border-color: hsl(var(--white-hsl) / 0.22);
}

/* Large typographic link list */
.nav-mobile-links {
  display: flex;
  flex-direction: column;
  flex: 1;
  justify-content: center;
  gap: 0;
}
.nav-mobile-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  border-bottom: 1px solid hsl(var(--white-hsl) / 0.07);
  color: hsl(var(--white-hsl) / 0.45);
  font-family: var(--display);
  font-size: clamp(32px, 9vw, 48px);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav-mobile-link:hover { color: var(--white); }
.nav-mobile-link.active { color: var(--electric); }

/* Arrow icon beside each link */
.nav-mobile-arrow {
  width: clamp(18px, 4vw, 24px);
  height: clamp(18px, 4vw, 24px);
  opacity: 0;
  transform: translate(-4px, 4px);
  transition:
    opacity var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out);
  flex-shrink: 0;
  color: var(--electric);
}
.nav-mobile-link:hover .nav-mobile-arrow,
.nav-mobile-link.active .nav-mobile-arrow {
  opacity: 1;
  transform: translate(0, 0);
}

/* Footer wordmark */
.nav-mobile-footer {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.10em;
  color: hsl(var(--white-hsl) / 0.20);
  padding-top: 32px;
  flex-shrink: 0;
}

/* ==========================================================================
   Mobile (shared rules — page-specific overrides go in their own files)
   ========================================================================== */

@media (max-width: 900px) {
  .nav-links    { display: none; }
  .nav-hamburger { display: flex; }
  .container, .container-narrow { padding: 0 24px; }
  /* Soften the mesh on mobile so it doesn't compete with content */
  body::before { opacity: 0.85; }
}

/* ==========================================================================
   Footer — narrow-viewport layout
   May 5, 2026: with up to 4 footer links beside the © URL, the inner row
   wraps on narrow viewports so links never get clipped on mobile (where the
   primary nav also hides). Below 700px the row stacks vertically.
   ========================================================================== */

@media (max-width: 700px) {
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
  }
  .footer-links {
    width: 100%;
    gap: 18px;
  }
}

/* Active state for footer link representing the current page —
   mirrors the .nav-link.active treatment so the user always sees
   "you are here" in both nav and footer. */
.footer-link.active,
.footer-link[aria-current="page"] {
  color: var(--white);
}
.footer-link[aria-current="page"] {
  cursor: default;
}