:root {
  --void: #080807;
  --void-raised: #101010;
  --void-soft: #1a1a17;
  --paper: #e9e5dc;
  --paper-bright: #f6f2e9;
  --paper-soft: #c4bfb4;
  --paper-muted: #8f8a80;
  --paper-faint: #7d776e;
  --amber: #f2991f;
  --amber-bright: #ffb84d;
  --amber-deep: #c2711a;
  /* On paper: --orange is display-scale only (3.2:1); --orange-ink carries
     small text at 5.0:1. Splitting them fixes a real AA failure. */
  --orange: #d9541f;
  --orange-ink: #a83c17;
  /* On the amber ground, --orange-ink only reaches 2.8:1. --ember carries
     small text there at 5.0:1. */
  --ember: #6b2409;
  /* Cool accent for keyboard focus. */
  --cyan: #5cc9d2;
  --line: rgba(233, 229, 220, 0.18);
  --line-soft: rgba(233, 229, 220, 0.09);
  --line-paper: rgba(9, 9, 8, 0.17);
  --display: "Switzer", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "Spline Sans Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --shell: 1500px;
  --gutter: clamp(1rem, 4vw, 4.6rem);
  --header-height: 4.85rem;
  --scene-progress: 0;
  --scroll-velocity: 0;
  --pointer-x: 0;
  --pointer-y: 0;
  --pointer-nx: 0;
  --pointer-ny: 0;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-line: cubic-bezier(0.16, 1, 0.3, 1);
  --track-display: -0.04em;   /* >= 8rem  */
  --track-mid: -0.028em;      /* 3-8rem   */
  --track-tight: -0.012em;    /* < 3rem   */
  --tight: var(--track-display);
  /* One rail for every left-edge inset, so the indent reads as a system. */
  --indent: clamp(1.25rem, 5.6vw, 6.2rem);
  /* Compact labels stay readable at small viewport sizes. */
  --mono-sm: 0.75rem;
  --mono-md: 0.75rem;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  background: var(--void);
  color: var(--paper);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background: var(--void);
  color: var(--paper);
  font-family: var(--display);
  font-weight: 400;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body.menu-open,
body.menu-is-open { overflow: hidden; }

[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
section[id] { scroll-margin-top: 6rem; }
button { color: inherit; font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

img, svg, canvas { display: block; max-width: 100%; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 5px;
}

.shell {
  width: min(var(--shell), calc(100% - (var(--gutter) * 2)));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 110;
  top: 0.75rem;
  left: 1rem;
  padding: 0.65rem 0.9rem;
  background: var(--amber);
  color: var(--void);
  font-family: var(--mono);
  font-size: var(--mono-md);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transform: translateY(-150%);
  transition: transform 180ms ease;
}

.skip-link:focus { transform: translateY(0); }

/* Loader ---------------------------------------------------------------- */

.loader {
  position: fixed;
  z-index: 100;
  inset: 0;
  display: grid;
  align-content: center;
  width: 100%;
  padding: var(--gutter);
  background: var(--void);
  color: var(--paper);
  font-family: var(--mono);
  font-size: var(--mono-md);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: opacity 600ms var(--ease), visibility 600ms var(--ease);
}

.loader.is-loaded {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.has-js:not([data-loader-complete="true"]) .loader.is-loaded {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
}

.loader-topline {
  display: flex;
  justify-content: space-between;
  width: min(24rem, 100%);
  margin-inline: auto;
}

.loader-line {
  width: min(24rem, 100%);
  height: 1px;
  margin: 1rem auto 0;
  background: var(--line);
}

.loader-line span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--amber);
  transform: scaleX(var(--loader-progress, 0));
  transform-origin: left;
}

.loader-skip {
  justify-self: end;
  margin: 3rem max(0px, calc((100% - 24rem) / 2)) 0 0;
  padding: 0.3rem 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--paper-muted);
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
}

.loader-skip:hover,
.loader-skip:focus-visible { color: var(--amber-bright); border-color: var(--amber); }

/* Persistent field ------------------------------------------------------ */

.field-layer {
  position: fixed;
  z-index: 0;
  inset: 0;
  overflow: hidden;
  background: var(--void);
  pointer-events: none;
  transform: translate3d(calc(var(--pointer-nx, 0) * 14px), calc(var(--pointer-ny, 0) * 14px), 0);
  transition: transform 1.2s var(--ease);
}

.field-fallback,
#coherence-field,
.field-grid,
.field-vignette {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.field-fallback {
  background:
    radial-gradient(ellipse at 56% 44%, rgba(242, 153, 31, 0.12), transparent 36%),
    radial-gradient(ellipse at 53% 75%, rgba(194, 113, 26, 0.10), transparent 30%),
    repeating-radial-gradient(ellipse at 56% 44%, transparent 0 1.45rem, rgba(242, 153, 31, 0.07) 1.52rem 1.58rem, transparent 1.66rem 3rem),
    linear-gradient(135deg, #090908 10%, #11100e 70%, #090908);
}

.field-fallback::before,
.field-fallback::after {
  position: absolute;
  content: "";
}

/* The canvas draws the real field; this ring is only the no-JS stand-in, and
   at small widths it reads as a stray outline over the raster. */
.has-js .field-fallback::after { display: none; }

.field-fallback::before {
  inset: 0;
  background-image:
    linear-gradient(rgba(233, 229, 220, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(233, 229, 220, 0.05) 1px, transparent 1px);
  background-size: clamp(3rem, 6vw, 6rem) clamp(3rem, 6vw, 6rem);
  -webkit-mask-image: radial-gradient(90% 80% at 56% 44%, #000, transparent 78%);
  mask-image: radial-gradient(90% 80% at 56% 44%, #000, transparent 78%);
}

.field-fallback::after {
  top: 24%;
  left: 42%;
  width: min(30vw, 26rem);
  aspect-ratio: 1;
  border: 1px solid rgba(242, 153, 31, 0.26);
  border-radius: 50%;
  box-shadow:
    0 0 0 1.5rem rgba(242, 153, 31, 0.025),
    0 0 0 4rem rgba(242, 153, 31, 0.03),
    0 0 7rem rgba(242, 153, 31, 0.07);
  transform: rotate(-16deg) scaleY(0.62);
}

#coherence-field { z-index: 1; }
.field-grid { z-index: 2; opacity: 0.14; background-image: linear-gradient(90deg, transparent 49.95%, rgba(242, 153, 31, 0.16) 50%, transparent 50.05%); }
.field-vignette { z-index: 3; background: radial-gradient(ellipse at 56% 44%, transparent 40%, rgba(8, 8, 7, 0.52) 100%); }

/* Instrument header ----------------------------------------------------- */

.site-header {
  position: fixed;
  z-index: 50;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-height);
  color: var(--paper-bright);
  pointer-events: none;
  transition: color 250ms ease;
}

.instrument-nav {
  position: relative;
  z-index: 46;
  display: grid;
  grid-template-columns: auto auto;
  align-items: center;
  width: min(540px, calc(100% - (var(--gutter) * 2)));
  min-height: 3.7rem;
  margin-top: 0.85rem;
  padding: 0.45rem 1.1rem;
  justify-content: space-between;
  gap: 1.5rem;
  border: 1px solid rgba(233, 229, 220, 0.2);
  background: rgba(9, 9, 8, 0.72);
  box-shadow: 0 0.8rem 2.5rem rgba(0, 0, 0, 0.12);
  backdrop-filter: blur(16px);
  pointer-events: auto;
  transition: width 380ms var(--ease), background 300ms ease, border-color 300ms ease, transform 300ms var(--ease);
}

.site-header.is-scrolled .instrument-nav,
.site-header.is-condensed .instrument-nav { transform: translateY(-0.25rem) scale(0.97); background: rgba(9, 9, 8, 0.9); }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding-block: 0.4rem;
  color: var(--paper-bright);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: var(--track-tight);
  line-height: 1;
}

.brand-name span { color: var(--amber-bright); }

.brand-mark {
  position: relative;
  display: grid;
  width: 1rem;
  height: 1rem;
  place-items: center;
  border: 1px solid rgba(242, 153, 31, 0.82);
  border-radius: 50%;
}

.brand-mark::before,
.brand-mark::after {
  position: absolute;
  border: 1px solid rgba(130, 219, 225, 0.48);
  border-radius: 50%;
  content: "";
}

.brand-mark::before { inset: -0.23rem; }
.brand-mark::after { inset: -0.42rem; opacity: 0.45; }
.brand-mark span { width: 0.3rem; height: 0.3rem; border-radius: 50%; background: var(--amber-bright); box-shadow: 0 0 0.7rem rgba(255, 184, 77, 0.9); }

.header-progress { display: flex; align-items: center; justify-content: center; gap: 0.5rem; min-width: 0; margin-inline: 0.65rem; color: var(--paper-muted); font-family: var(--mono); font-size: var(--mono-sm); letter-spacing: 0.04em; }
.progress-ticks { display: flex; align-items: center; gap: 0.22rem; margin: 0; padding: 0; list-style: none; }
.progress-ticks li { display: block; width: 0.7rem; height: 1px; background: var(--line); transition: background 250ms ease, transform 250ms var(--ease); }
.progress-ticks li.is-complete { background: var(--paper-faint); }
.progress-ticks li.is-active,
.progress-ticks li[aria-current="step"] { background: var(--amber-bright); transform: scaleY(2); }
.progress-index { color: var(--paper-bright); }
.progress-total { color: #847e75; }

.header-actions { display: flex; align-items: center; gap: 1.5rem; }
.header-signup { padding-block: 0.85rem; color: var(--paper-soft); font-family: var(--mono); font-size: var(--mono-sm); letter-spacing: 0.04em; text-transform: uppercase; transition: color 180ms ease; }
.header-signup span { color: var(--amber-bright); font-size: 0.8rem; }
.header-signup:hover,
.header-signup:focus-visible { color: var(--paper-bright); }

.menu-toggle { display: inline-flex; align-items: center; gap: 0.42rem; min-height: 44px; padding: 0.5rem 0; border: 0; background: transparent; cursor: pointer; font-family: var(--mono); font-size: var(--mono-sm); letter-spacing: 0.06em; text-transform: uppercase; }
.menu-toggle-icon { display: grid; gap: 3px; width: 0.95rem; }
.menu-toggle-icon i { display: block; height: 1px; background: currentColor; transition: transform 180ms ease; }
.menu-toggle[aria-expanded="true"] .menu-toggle-icon i:first-child { transform: translateY(2px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle-icon i:last-child { transform: translateY(-2px) rotate(-45deg); }

.frame-corner { position: fixed; z-index: 45; width: 0.8rem; height: 0.8rem; border-color: rgba(233, 229, 220, 0.32); border-style: solid; pointer-events: none; }
.frame-corner-tl { top: 1.15rem; left: var(--gutter); border-width: 1px 0 0 1px; }
.frame-corner-tr { top: 1.15rem; right: var(--gutter); border-width: 1px 1px 0 0; }
.frame-corner-bl { bottom: 1.15rem; left: var(--gutter); border-width: 0 0 1px 1px; }
.frame-corner-br { right: var(--gutter); bottom: 1.15rem; border-width: 0 1px 1px 0; }

/* The monogram frames the viewport the way registration marks frame a plate:
   the page reads as something mounted in an instrument, not a document. */
.frame-letter {
  position: fixed;
  z-index: 44;
  color: var(--paper-bright);
  font-size: clamp(1.5rem, 2.6vw, 2.6rem);
  font-weight: 400;
  letter-spacing: -0.05em;
  line-height: 1;
  opacity: 0.17;
  pointer-events: none;
  transition: opacity 400ms var(--ease), color 400ms ease;
}
.frame-letter-tl { top: 2.2rem; left: var(--gutter); }
.frame-letter-tr { top: 2.2rem; right: var(--gutter); }

.menu-backdrop {
  position: fixed;
  z-index: 40;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: rgba(4, 5, 4, 0.72);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  -webkit-backdrop-filter: blur(16px) saturate(0.75);
  backdrop-filter: blur(16px) saturate(0.75);
  transition: opacity 300ms ease, visibility 300ms ease;
}

.menu-backdrop.is-visible,
.menu-open .menu-backdrop,
.menu-is-open .menu-backdrop { opacity: 1; pointer-events: auto; visibility: visible; }

/* The panel and header use the same width token in the open state, turning
   the compact nav into one centered terminal object. */
.menu-panel {
  position: fixed;
  z-index: 45;
  top: 4.5rem;
  left: 50%;
  display: grid;
  width: min(380px, calc(100% - (var(--gutter) * 2)));
  max-height: calc(100svh - 5.5rem);
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  border: 1px solid rgba(233, 229, 220, 0.2);
  background: #0b0c0a;
  box-shadow: 0 1.8rem 5rem rgba(0, 0, 0, 0.42);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -0.7rem);
  visibility: hidden;
  transition: width 380ms var(--ease), opacity 260ms ease, transform 380ms var(--ease), visibility 260ms ease, border-color 380ms ease;
}

.menu-panel[hidden] { display: none; }
.menu-panel.is-open,
.menu-open .menu-panel,
.menu-is-open .menu-panel { opacity: 1; pointer-events: auto; transform: translate(-50%, 0); visibility: visible; }

.menu-open .instrument-nav,
.menu-is-open .instrument-nav {
  width: min(760px, calc(100% - (var(--gutter) * 2)));
  border-color: rgba(242, 153, 31, 0.52);
  background: rgba(11, 12, 10, 0.96);
  transform: translateY(0) scale(1);
}

.menu-open .menu-panel,
.menu-is-open .menu-panel { width: min(760px, calc(100% - (var(--gutter) * 2))); border-color: rgba(242, 153, 31, 0.52); border-top-color: rgba(242, 153, 31, 0.14); }

.menu-panel-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 3.3rem; padding: 0.8rem 1rem; border-bottom: 1px solid rgba(233, 229, 220, 0.18); color: var(--paper-muted); font-family: var(--mono); font-size: var(--mono-sm); letter-spacing: 0.07em; text-transform: uppercase; }
.menu-panel-status { display: flex; align-items: center; gap: 0.9rem; color: var(--paper-faint); font-size: var(--mono-sm); text-align: right; }
.menu-panel-status [data-menu-signal] { display: inline-flex; align-items: center; gap: 0.35rem; color: var(--cyan); }
.menu-panel-status [data-menu-signal] i { display: inline-block; width: 0.35rem; height: 0.35rem; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0.55rem var(--cyan); }

.menu-panel-links { display: grid; border-bottom: 2px solid var(--void); }
.menu-panel-links a {
  position: relative;
  display: grid;
  grid-template-columns: 3.5rem 1fr 3.5rem;
  align-items: center;
  min-height: clamp(2.9rem, 7vh, 4rem);
  padding: 0 1rem;
  border-bottom: 2px solid var(--void);
  color: var(--paper-bright);
  letter-spacing: var(--track-mid);
  line-height: 1;
  opacity: 0;
  transform: translateY(0.65rem);
  transition: color 180ms ease, background 220ms ease, opacity 320ms var(--ease), transform 420ms var(--ease);
  transition-delay: 0ms, 0ms, calc(var(--row-index, 0) * 28ms), calc(var(--row-index, 0) * 28ms);
}

.menu-panel.is-open .menu-panel-links a,
.menu-open .menu-panel-links a,
.menu-is-open .menu-panel-links a { opacity: 1; transform: translateY(0); }

.menu-row-index { align-self: center; color: var(--paper-faint); font-family: var(--mono); font-size: var(--mono-md); letter-spacing: 0.03em; transition: color 180ms ease; }
.menu-row-label { display: block; color: var(--paper-bright); font-size: clamp(1.4rem, 2.5vw, 2rem); font-weight: 500; text-align: center; transition: color 180ms ease, transform 300ms var(--ease); }
.menu-row-mark { justify-self: end; width: 0.6rem; height: 0.6rem; border: 1px solid var(--paper-faint); transform: rotate(45deg); transition: background 180ms ease, border-color 180ms ease, transform 300ms var(--ease); }
.menu-panel-links a:nth-child(2n) .menu-row-mark { border-color: var(--amber); border-radius: 50%; }
.menu-panel-links a:hover,
.menu-panel-links a:focus-visible { background: var(--amber); color: var(--void); }
.menu-panel-links a:hover .menu-row-index,
.menu-panel-links a:focus-visible .menu-row-index { color: rgba(9, 9, 8, 0.62); }
.menu-panel-links a:hover .menu-row-label,
.menu-panel-links a:focus-visible .menu-row-label { color: var(--void); transform: translateX(0.15rem); }
.menu-panel-links a:hover .menu-row-mark,
.menu-panel-links a:focus-visible .menu-row-mark { border-color: var(--void); background: var(--void); transform: rotate(45deg) scale(0.84); }
.menu-panel-links a.is-current,
.menu-panel-links a[aria-current="page"] { background: rgba(242, 153, 31, 0.08); box-shadow: inset 2px 0 0 var(--amber); }
.menu-panel-links a.is-current .menu-row-index,
.menu-panel-links a[aria-current="page"] .menu-row-index { color: var(--amber-bright); }
.menu-panel-links a.is-current .menu-row-mark,
.menu-panel-links a[aria-current="page"] .menu-row-mark { border-color: var(--amber); background: var(--amber); }
.menu-panel-links:has(a:hover) a.is-current:focus-visible:not(:hover),
.menu-panel-links:has(a:hover) a[aria-current="page"]:focus-visible:not(:hover) { background: rgba(242, 153, 31, 0.08); color: var(--paper-bright); box-shadow: inset 2px 0 0 var(--amber); }
.menu-panel-links:has(a:hover) a.is-current:focus-visible:not(:hover) .menu-row-index,
.menu-panel-links:has(a:hover) a[aria-current="page"]:focus-visible:not(:hover) .menu-row-index { color: var(--amber-bright); }
.menu-panel-links:has(a:hover) a.is-current:focus-visible:not(:hover) .menu-row-label,
.menu-panel-links:has(a:hover) a[aria-current="page"]:focus-visible:not(:hover) .menu-row-label { color: var(--paper-bright); transform: none; }
.menu-panel-links:has(a:hover) a.is-current:focus-visible:not(:hover) .menu-row-mark,
.menu-panel-links:has(a:hover) a[aria-current="page"]:focus-visible:not(:hover) .menu-row-mark { border-color: var(--amber); background: var(--amber); }

.menu-ascii { position: relative; display: block; height: 14.5rem; min-height: 14.5rem; margin: 0; padding: 1rem 1.2rem; overflow: hidden; border-bottom: 2px solid var(--void); background: #050605; color: rgba(233, 229, 220, 0.53); font-family: var(--mono); font-size: clamp(0.45rem, 0.62vw, 0.58rem); letter-spacing: 0.07em; line-height: 1.62; opacity: 0; text-shadow: 0 0 0.55rem rgba(242, 153, 31, 0.20); transform: translateY(0.5rem); transition: opacity 350ms var(--ease), transform 350ms var(--ease); white-space: pre; }
.menu-panel.is-open .menu-ascii,
.menu-open .menu-ascii,
.menu-is-open .menu-ascii { opacity: 1; transform: none; transition-delay: 180ms; }
.menu-ascii::before,
.menu-ascii::after { position: absolute; inset: 0; content: ""; pointer-events: none; }
.menu-ascii::before { background: linear-gradient(102deg, rgba(242, 153, 31, 0.20), transparent 24%, transparent 65%, rgba(242, 153, 31, 0.12)); mix-blend-mode: screen; }
.menu-ascii::after { background: linear-gradient(180deg, transparent 68%, rgba(242, 153, 31, 0.14)); -webkit-mask-image: linear-gradient(180deg, #000 0 82%, transparent 100%); mask-image: linear-gradient(180deg, #000 0 82%, transparent 100%); }

.menu-utility { display: grid; grid-template-columns: repeat(2, 1fr); border-bottom: 2px solid var(--void); }
.menu-utility a { display: grid; grid-template-columns: 1fr auto; grid-template-rows: auto auto; align-items: center; min-height: 4.15rem; padding: 0.7rem 1rem; border-right: 2px solid var(--void); color: var(--paper-bright); opacity: 0; transform: translateY(0.5rem); transition: background 200ms ease, color 180ms ease, opacity 350ms var(--ease), transform 350ms var(--ease); transition-delay: 0ms, 0ms, 230ms, 230ms; }
.menu-utility a:last-child { border-right: 0; transition-delay: 290ms, 0ms, 290ms, 290ms; }
.menu-panel.is-open .menu-utility a,
.menu-open .menu-utility a,
.menu-is-open .menu-utility a { opacity: 1; transform: none; }
.menu-utility a span { grid-column: 1 / -1; color: var(--paper-muted); font-family: var(--mono); font-size: var(--mono-sm); letter-spacing: 0.08em; text-transform: uppercase; }
.menu-utility a b { font-size: 1.05rem; font-weight: 500; letter-spacing: var(--track-tight); }
.menu-utility a i { justify-self: end; color: var(--amber); font-size: 1rem; font-style: normal; }
.menu-utility a:hover,
.menu-utility a:focus-visible { background: var(--amber); color: var(--void); }
.menu-utility a:hover span,
.menu-utility a:focus-visible span,
.menu-utility a:hover i,
.menu-utility a:focus-visible i { color: var(--void); }

.menu-channel-rail { display: grid; grid-template-columns: repeat(3, 1fr); height: 0.55rem; }
.menu-channel-rail span { display: block; transition: opacity 250ms ease, transform 450ms var(--ease); transform: scaleX(0); transform-origin: left; }
.menu-channel-rail span:nth-child(1) { background: var(--amber); }
.menu-channel-rail span:nth-child(2) { background: var(--amber-deep); transition-delay: 80ms; }
.menu-channel-rail span:nth-child(3) { background: var(--paper); transition-delay: 160ms; }
.menu-panel.is-open .menu-channel-rail span,
.menu-open .menu-channel-rail span,
.menu-is-open .menu-channel-rail span { transform: scaleX(1); }

.is-theme-paper { color: var(--void); }
/* updateHeader() writes data-theme; the is-theme-paper class it was written
   against is never set, so the header never inverted over the light sections. */
.site-header.is-theme-paper .instrument-nav,
.site-header[data-theme="paper"] .instrument-nav,
.site-header[data-theme="amber"] .instrument-nav { border-color: rgba(9, 9, 8, 0.22); background: rgba(240, 236, 227, 0.9); }
.site-header.is-theme-paper .brand,
.site-header.is-theme-paper .header-signup,
.site-header.is-theme-paper .progress-index,
.site-header[data-theme="paper"] .brand,
.site-header[data-theme="paper"] .header-signup,
.site-header[data-theme="paper"] .progress-index,
.site-header[data-theme="amber"] .brand,
.site-header[data-theme="amber"] .header-signup,
.site-header[data-theme="amber"] .progress-index { color: var(--void); }
.site-header[data-theme="paper"] .menu-toggle,
.site-header[data-theme="amber"] .menu-toggle { color: var(--void); }
.site-header[data-theme="paper"] .progress-total,
.site-header[data-theme="amber"] .progress-total { color: rgba(9, 9, 8, 0.55); }
.site-header[data-theme="paper"] .progress-ticks li,
.site-header[data-theme="amber"] .progress-ticks li { background: rgba(9, 9, 8, 0.26); }
.site-header.is-theme-paper .brand-name span,
.site-header.is-theme-paper .header-signup span,
.site-header[data-theme="paper"] .brand-name span,
.site-header[data-theme="paper"] .header-signup span,
.site-header[data-theme="amber"] .brand-name span,
.site-header[data-theme="amber"] .header-signup span { color: var(--orange-ink); }
.site-header[data-theme="paper"] .progress-ticks li.is-complete,
.site-header[data-theme="amber"] .progress-ticks li.is-complete { background: rgba(9, 9, 8, 0.45); }
.site-header[data-theme="paper"] .progress-ticks li.is-active,
.site-header[data-theme="amber"] .progress-ticks li.is-active { background: var(--orange-ink); }
.site-header[data-theme="paper"] .frame-letter,
.site-header[data-theme="amber"] .frame-letter { color: var(--void); opacity: 0.22; }
.site-header[data-theme="paper"] .frame-corner,
.site-header[data-theme="amber"] .frame-corner { border-color: rgba(9, 9, 8, 0.3); }

/* Scene scaffold -------------------------------------------------------- */

.scene {
  position: relative;
  z-index: 2;
  min-height: 0;
  overflow: hidden;
  isolation: isolate;
}

.section-ink { background: rgba(8, 8, 7, 0.88); color: var(--paper); }
.section-paper { background: var(--paper); color: var(--void); }
.section-amber { background: var(--amber); color: var(--void); }

.scene::before {
  position: absolute;
  top: 0;
  right: var(--gutter);
  left: var(--gutter);
  height: 1px;
  background: var(--line);
  content: "";
}

.scene::after {
  position: absolute;
  top: 0;
  left: var(--gutter);
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent, var(--line) 22%, var(--line) 78%, transparent);
  content: "";
  opacity: 0.42;
}

.section-paper::before { background: var(--line-paper); }
.section-paper::after { background: linear-gradient(180deg, transparent, var(--line-paper) 20%, var(--line-paper) 80%, transparent); }
.section-amber::before { background: rgba(9, 9, 8, 0.22); }
.section-amber::after { background: linear-gradient(180deg, transparent, rgba(9, 9, 8, 0.22) 20%, rgba(9, 9, 8, 0.22) 80%, transparent); }

.scene-frame { position: relative; z-index: 1; min-height: 0; padding-top: 6rem; padding-bottom: 6rem; }

.scene-progress { position: absolute; z-index: 2; top: 6rem; right: var(--gutter); font-family: var(--mono); font-size: var(--mono-md); letter-spacing: 0.08em; line-height: 1; text-transform: uppercase; }
.scene-hero .scene-progress { display: none; }
.scene-progress::before { display: inline-block; width: 2rem; height: 1px; margin: 0 0.65rem 0.2rem 0; background: currentColor; content: ""; opacity: 0.6; }
.scene-progress span { color: var(--amber-bright); }
.section-paper .scene-progress span { color: var(--orange-ink); }
.section-amber .scene-progress span { color: var(--ember); }

.scene-heading { display: flex; align-items: center; gap: 1rem; color: var(--paper-muted); font-family: var(--mono); font-size: var(--mono-md); letter-spacing: 0.09em; line-height: 1.4; text-transform: uppercase; }
.section-paper .scene-heading,
.section-amber .scene-heading { color: rgba(9, 9, 8, 0.78); }
.section-label { display: flex; align-items: baseline; gap: 0.55rem; margin: 0; }
.section-label span { color: var(--amber); }
.section-paper .section-label span { color: var(--orange-ink); }
.section-amber .section-label span { color: var(--ember); }
.heading-rule { display: block; width: clamp(3rem, 14vw, 11rem); height: 1px; background: currentColor; opacity: 0.5; }

[data-line] { display: block; }

/* Masked line rise. The mask box is extended below the baseline and pulled
   back with a negative margin so descenders are not clipped at rest while
   line-height stays at its display value. */
.reveal-ready [data-line] {
  overflow: hidden;
  padding-bottom: 0.16em;
  margin-bottom: -0.16em;
}
.reveal-ready [data-line] > .line-in {
  display: inline-block;
  vertical-align: top;
  max-width: 100%;
  transform: translateY(112%);
  transition: transform 720ms var(--ease-line);
  transition-delay: var(--line-delay, 0ms);
  will-change: transform;
}
.reveal-ready .is-revealed [data-line] > .line-in,
.reveal-ready [data-reveal].is-revealed [data-line] > .line-in { transform: none; }

/* Headings that animate line by line must not also fade as a block. */
.reveal-ready h1[data-reveal],
.reveal-ready h2[data-reveal] { opacity: 1; transform: none; transition: none; }
[data-depth-word] { display: inline-block; transition: transform 900ms var(--ease); transform: translate3d(calc(var(--pointer-nx, 0) * 0.05em), calc(var(--scene-progress, 0) * -0.08em), 0); }

[data-scene].is-current .scene-heading { color: var(--paper-soft); }
[data-scene].section-paper.is-current .scene-heading { color: rgba(9, 9, 8, 0.72); }
[data-scene].is-current::before { opacity: 0.95; }

/* Hero ------------------------------------------------------------------ */

.scene-hero { min-height: 100svh; background: rgba(8, 8, 7, 0.08); }
.scene-hero .scene-frame { display: flex; flex-direction: column; justify-content: space-between; min-height: 100svh; padding-top: 6.5rem; padding-bottom: clamp(1rem, 2.2vh, 1.7rem); }
.scene-meta,
.scene-foot,
.eyebrow,
.detail-index,
.loop-caption,
.footer-bottom {
  font-family: var(--mono);
  font-size: var(--mono-md);
  letter-spacing: 0.08em;
  line-height: 1.45;
  text-transform: uppercase;
}

.scene-meta { display: flex; justify-content: space-between; gap: 1rem; color: var(--paper-muted); }
.scene-meta > span:first-child { color: var(--paper-soft); }
.signal-dot { display: inline-block; width: 0.42rem; height: 0.42rem; margin-right: 0.42rem; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0.8rem rgba(130, 219, 225, 0.9); }
.hero-copy { margin-block: auto; padding: 2rem 0; }
.eyebrow { display: flex; align-items: center; gap: 0.75rem; margin: 0 0 clamp(1.1rem, 2vw, 1.9rem) 0.1rem; color: var(--amber-bright); }
.eyebrow span { color: var(--paper-muted); }

.hero-copy h1,
.thesis-body h2,
.system-intro h2,
.loop-copy h2,
.research-layout h2,
.contact-body h2 {
  margin: 0;
  font-weight: 400;
  letter-spacing: var(--track-display);
  line-height: 0.89;
}

.hero-copy h1 { max-width: none; color: var(--paper-bright); font-size: clamp(4rem, min(11.8vw, 19vh), 11.5rem); }
.title-slash { color: var(--amber-bright); font-style: normal; font-weight: 400; }
.title-period { color: var(--amber); }
.hero-lower { display: flex; align-items: flex-end; flex-wrap: wrap; gap: 2rem; margin: 2rem 0 0; }
.hero-deck { flex: 1 1 22rem; max-width: 31rem; margin: 0; color: var(--paper-soft); font-size: clamp(1rem, 1.5vw, 1.25rem); letter-spacing: -0.018em; line-height: 1.42; }
.hero-actions { display: flex; align-items: center; flex: 0 0 auto; gap: clamp(1.4rem, 3vw, 2.8rem); margin: 0; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 1.35rem; min-height: 3.35rem; padding: 0.8rem 1.15rem 0.75rem 1.3rem; border: 1px solid transparent; font-family: var(--mono); font-size: var(--mono-md); letter-spacing: 0.08em; line-height: 1; text-transform: uppercase; transition: background 200ms ease, color 200ms ease, transform 200ms var(--ease), translate 220ms var(--ease); }
.button span { font-size: 1rem; line-height: 0; }
.button:hover { transform: translateY(-2px); }
.button-amber { background: var(--amber); color: var(--void); }
.button-amber:hover,
.button-amber:focus-visible { background: var(--amber-bright); }
.button-dark { background: var(--void); color: var(--paper-bright); }
.button-dark:hover,
.button-dark:focus-visible { background: var(--void-soft); }

.text-link { display: inline-flex; align-items: center; gap: 1.25rem; padding-block: 0.4rem; border-bottom: 1px solid var(--line); color: var(--paper-bright); font-family: var(--mono); font-size: var(--mono-md); letter-spacing: 0.06em; text-transform: uppercase; transition: gap 220ms var(--ease), border-color 180ms ease, color 180ms ease; }
.text-link span { color: var(--amber-bright); font-size: 1rem; line-height: 0; }
.text-link:hover,
.text-link:focus-visible { gap: 1.7rem; border-color: var(--amber); }
.text-link-dark { border-color: var(--line-paper); color: var(--void); }
.text-link-dark span { color: var(--orange-ink); }
.text-link-dark:hover,
.text-link-dark:focus-visible { border-color: var(--orange); }

.scene-foot { display: flex; justify-content: space-between; gap: 1rem; margin-top: auto; color: var(--paper-muted); }
.scene-foot span { display: flex; align-items: center; }
.scene-foot b { margin-left: 0.6rem; color: var(--amber); font-size: 1rem; font-weight: 400; }

/* Thesis ---------------------------------------------------------------- */

.scene-thesis { min-height: 0; }
.thesis-frame { display: flex; flex-direction: column; }
.thesis-body { margin: auto 0; padding: clamp(2rem, 4vw, 4rem) 0 0; }
.thesis-body h2 { max-width: none; color: var(--void); font-size: clamp(2.75rem, 6.5vw, 6.8rem); line-height: 1; }
.thesis-body h2 em { color: var(--orange); font-style: normal; }
.thesis-note { display: flex; align-items: end; justify-content: space-between; gap: 2rem; max-width: 46rem; margin: clamp(2.5rem, 5vw, 4.5rem) 0 0 auto; }
.thesis-note p { max-width: 28rem; margin: 0; color: rgba(9, 9, 8, 0.72); font-size: clamp(1.04rem, 0.94rem + 0.45vw, 1.34rem); letter-spacing: -0.018em; line-height: 1.44; }

/* System ---------------------------------------------------------------- */

.scene-system { min-height: 0; }
.system-frame { padding-bottom: 6rem; }
.system-intro { display: grid; grid-template-columns: minmax(0, 2fr) minmax(13rem, 1fr); align-items: end; gap: 4rem; margin-top: 3rem; }
.system-intro h2 { max-width: none; color: var(--paper-bright); font-size: clamp(3rem, 6vw, 6rem); line-height: 1; }
.system-intro h2 em { color: var(--amber-bright); font-style: normal; }
.system-intro > p { max-width: 19rem; margin: 0 0 0.55rem; color: var(--paper-soft); font-size: clamp(1rem, 0.94rem + 0.28vw, 1.2rem); letter-spacing: -0.015em; line-height: 1.44; }
/* Native disclosures expose real platform details, including without JS. */
.module-list { margin-top: 3rem; border-top: 1px solid var(--line); }
.module { border-bottom: 1px solid var(--line); }
.module-row { display: grid; grid-template-columns: 2.5rem 1fr 1.2fr 1.5rem; align-items: center; gap: 1.5rem; min-height: 6.5rem; padding: 1.2rem 1rem; cursor: pointer; list-style: none; transition: background 200ms ease; }
.module-row::-webkit-details-marker { display: none; }
.module-row:hover, .module[open] .module-row { background: rgba(242,153,31,0.055); }
.module-number { color: var(--amber-bright); font: var(--mono-md) var(--mono); }
.module-title { color: var(--paper-bright); font-size: clamp(2rem, 3.5vw, 3.5rem); letter-spacing: var(--track-mid); line-height: 1.1; }
.module-description { max-width: 24rem; color: var(--paper-soft); font-size: 1rem; }
.module-arrow { color: var(--amber); font-size: 1.7rem; transition: transform 200ms var(--ease); }
.module[open] .module-arrow { transform: rotate(45deg); }
.module-detail { padding: 1rem 4rem 2.5rem; max-width: 62rem; }
.module-detail > p { max-width: 45rem; color: var(--paper-soft); font-size: 1.0625rem; }
.module-detail dl { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 2rem; margin: 2rem 0; }
.module-detail dt { color: var(--amber-bright); font: var(--mono-md) var(--mono); text-transform: uppercase; margin-bottom: 0.65rem; }
.module-detail dd { margin: 0; color: var(--paper); font-size: 1rem; }

/* A small, reproducible experiment replaces the decorative loop. */
.scene-loop { min-height: 0; background: #10100e; }
.experiment-heading { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 4rem; align-items: end; margin: 3rem 0; }
.experiment-heading h2 { margin: 0; color: var(--paper-bright); font-size: clamp(2.5rem,5vw,5rem); line-height: 1; font-weight: 400; letter-spacing: var(--track-display); }
.experiment-heading h2 em { color: var(--amber-bright); font-style: normal; }
.experiment-heading > p { margin: 0; color: var(--paper-soft); max-width: 28rem; font-size: 1.0625rem; }
.experiment { border: 1px solid var(--line); background: var(--void); }
.experiment-topline, .experiment-bottomline { display: flex; justify-content: space-between; gap: 1.5rem; padding: 1.25rem 1.5rem; }
.experiment-topline { border-bottom: 1px solid var(--line); color: var(--paper-soft); font: var(--mono-md)/1.5 var(--mono); }
.experiment-controls { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); border-bottom: 1px solid var(--line); }
.experiment-controls button { display: flex; justify-content: space-between; gap: 0.5rem; min-height: 4rem; padding: 1rem 1.5rem; border: 0; border-right: 1px solid var(--line); background: transparent; cursor: pointer; color: var(--paper-soft); text-align: left; }
.experiment-controls button:last-child { border-right: 0; }
.experiment-controls button span { font: var(--mono-md)/1.5 var(--mono); }
.experiment-controls button:hover { background: var(--void-soft); color: var(--paper-bright); }
.experiment-controls button[aria-pressed="true"] { background: var(--amber); color: var(--void); }
.experiment-controls button:focus-visible { outline-offset: -4px; outline-color: currentColor; }
.experiment-workspace { display: grid; grid-template-columns: 1fr 1fr; }
.experiment-panels { min-width: 0; padding: 2rem; border-right: 1px solid var(--line); }
.example-panel { min-height: 26rem; }
.example-panel + .example-panel { margin-top: 2rem; }
.experiment.is-interactive .example-panel { margin-top: 0; }
.example-panel h3 { margin: 0 0 1.25rem; font-size: clamp(1.75rem,2.5vw,2.5rem); letter-spacing: var(--track-mid); font-weight: 400; line-height: 1.15; }
.example-panel p { color: var(--paper-soft); font-size: 1rem; }
.example-panel .detail-index { color: var(--amber-bright); font-size: var(--mono-md); }
.example-panel pre { white-space: pre-wrap; overflow-wrap: anywhere; padding: 1rem; border: 1px solid var(--line); color: var(--paper-bright); font: 0.875rem/1.6 var(--mono); }
.artifact-values { margin: 1.5rem 0 0; display: grid; gap: 1rem; }
.artifact-values dt, .example-panel .artifact-label { font: var(--mono-md)/1.5 var(--mono); color: var(--paper-soft); }
.artifact-values dd, .example-panel .artifact-output { margin: 0.4rem 0 0; color: var(--amber-bright); font: 0.9375rem/1.6 var(--mono); overflow-wrap: anywhere; }
.signal-chart { margin: 0; min-width: 0; align-self: center; padding: 2rem; }
.signal-chart svg { width: 100%; height: auto; overflow: visible; }
.chart-grid { fill: none; stroke: var(--line); stroke-width: 1; }
.chart-labels { fill: var(--paper-soft); font: 14px var(--mono); }
.chart-reference { fill: none; stroke: var(--paper-soft); stroke-width: 2; stroke-dasharray: 5 7; }
.chart-output { fill: none; stroke: var(--amber-bright); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.signal-chart figcaption { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.5rem; color: var(--paper-soft); font: var(--mono-md)/1.5 var(--mono); }
.signal-chart figcaption span::before { content: ''; display: inline-block; vertical-align: middle; width: 1.2rem; margin-right: 0.5rem; border-top: 2px solid var(--amber-bright); }
.signal-chart figcaption .legend-reference::before { border-color: var(--paper-soft); border-top-style: dashed; }
.chart-metric { text-align: center; margin-top: 2rem; font: var(--mono-md)/1.6 var(--mono); color: var(--paper-soft); }
.experiment-bottomline { align-items: center; border-top: 1px solid var(--line); }
.experiment-bottomline p { max-width: 40rem; margin: 0; font-size: 0.9375rem; color: var(--paper-soft); }
.experiment-bottomline .text-link { flex-shrink: 0; }

/* Research -------------------------------------------------------------- */

.scene-research { min-height: 0; }
.research-frame { display: flex; flex-direction: column; }
.research-layout { display: grid; grid-template-columns: minmax(16rem, 0.85fr) minmax(0, 1.15fr); align-items: start; gap: 4rem; margin: 3rem 0 0; padding: 0; }
.research-layout h2 { max-width: none; color: var(--void); font-size: clamp(2.75rem, 5.5vw, 5.5rem); line-height: 1; }
.research-layout h2 em { color: var(--orange); font-style: normal; }
.research-body { padding-top: 0.5rem; }
.research-lede { max-width: 35rem; margin: 0; padding-bottom: 2rem; border-bottom: 1px solid var(--line-paper); color: var(--void); font-size: clamp(1.35rem, 1.2rem + 0.7vw, 2rem); letter-spacing: var(--track-mid); line-height: 1.2; }
.research-details { display: grid; grid-template-columns: 1fr; gap: 0; padding-top: 0; }
.research-details article { padding-right: clamp(0rem, 2vw, 2rem); }
.detail-index { margin: 0 0 1.2rem; color: var(--orange-ink); }
.research-details article > p:last-child { max-width: 20rem; margin: 0; color: rgba(9, 9, 8, 0.74); font-size: clamp(0.97rem, 0.92rem + 0.26vw, 1.14rem); letter-spacing: -0.014em; line-height: 1.46; }
.research-link { margin-top: clamp(3rem, 7vw, 7rem); }

/* Contact + footer ------------------------------------------------------ */

.scene-contact { min-height: 0; }
.contact-frame { display: flex; flex-direction: column; padding-bottom: clamp(1.5rem, 3vh, 2.5rem); }
.contact-body { margin: auto 0; padding: clamp(1.5rem, 3vw, 3rem) 0; }
.contact-body h2 { max-width: none; color: var(--void); font-size: clamp(2.75rem, 7vw, 7.4rem); line-height: 0.98; }
.contact-body h2 em {
  display: inline-block;
  padding: 0.1em 0.1em 0.145em;
  background: var(--void);
  color: var(--amber);
  font-style: normal;
  line-height: 0.76;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
.contact-actions { display: flex; align-items: center; gap: 2rem; margin: 2rem 0 0; }
.site-footer { position: relative; z-index: 2; padding: clamp(2rem, 5vw, 5rem) 0 1.7rem; }
.footer-top { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 2rem; align-items: start; padding-bottom: 4rem; }
.footer-brand { font-size: 1.1rem; }
.footer-note { margin: 0; color: var(--paper-muted); font-family: var(--mono); font-size: var(--mono-md); letter-spacing: 0.07em; line-height: 1.6; text-transform: uppercase; }
.footer-links { display: flex; justify-content: flex-end; gap: clamp(1rem, 2.3vw, 2.5rem); color: var(--paper-soft); font-family: var(--mono); font-size: var(--mono-md); letter-spacing: 0.05em; text-transform: uppercase; }
.footer-links a { position: relative; display: inline-block; padding-block: 0.42rem; transition: color 180ms ease; }
.footer-links a::after { position: absolute; right: 0; bottom: 0.1rem; left: 0; height: 1px; background: currentColor; content: ""; transform: scaleX(0); transform-origin: right; transition: transform 280ms var(--ease); }
.footer-links a:hover,
.footer-links a:focus-visible { color: var(--paper-bright); }
.footer-links a:hover::after,
.footer-links a:focus-visible::after { transform: scaleX(1); transform-origin: left; }
.footer-wordmark { max-width: 100%; overflow: hidden; color: var(--paper-bright); font-size: clamp(4rem, 16.6vw, 19rem); font-weight: 500; letter-spacing: -0.06em; line-height: 0.68; white-space: nowrap; }
.footer-wordmark span { color: var(--amber); }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; margin-top: clamp(2.5rem, 6vw, 6rem); color: var(--paper-faint); }
.footer-bottom p { margin: 0; }
.footer-bottom p:last-child span { padding-left: 0.3rem; color: var(--amber); }

.cursor-readout {
  position: fixed;
  z-index: 60;
  top: 0;
  left: 0;
  padding: 0.45rem 0.6rem;
  border: 1px solid rgba(92, 201, 210, 0.42);
  background: rgba(9, 9, 8, 0.86);
  color: var(--cyan);
  font-family: var(--mono);
  font-size: var(--mono-sm);
  letter-spacing: 0.08em;
  line-height: 1;
  opacity: 0;
  pointer-events: none;
  text-transform: uppercase;
  visibility: hidden;
  white-space: nowrap;
  transform: translate3d(var(--cursor-x, 0px), var(--cursor-y, 0px), 0);
  transition: transform 240ms var(--ease), opacity 170ms ease, visibility 170ms;
}
.cursor-readout.is-visible { opacity: 1; visibility: visible; }

.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; }

/* Reveals default to visible if JS is missing. */
.reveal-ready [data-reveal] { opacity: 0; transform: translateY(1.1rem); transition: opacity 620ms var(--ease), transform 620ms var(--ease); transition-delay: var(--reveal-delay, 0ms); }
.reveal-ready [data-reveal].is-visible,
.reveal-ready [data-reveal].is-revealed { opacity: 1; transform: none; }

/* Responsive ------------------------------------------------------------ */

/* Content sections share a rhythm, with room for dense evidence. */
.research-entry { display: block; padding: 1.8rem 0; border-bottom: 1px solid var(--line-paper); }
.research-entry h3 { margin: 0.75rem 0; font-size: 1.6rem; font-weight: 500; line-height: 1.15; letter-spacing: var(--track-tight); }
.research-entry p { color: #4a453e; font-size: 1rem; }
.research-entry-action { display: flex; justify-content: space-between; margin-top: 1.5rem; font: var(--mono-md)/1.5 var(--mono); text-transform: uppercase; color: var(--orange-ink); }
.research-entry:hover h3 { color: var(--orange-ink); }
.research-provenance { margin-top: 1.5rem; color: #4a453e; font-size: 0.9375rem; }
.contact-deck { max-width: 37rem; font-size: 1.125rem; margin: 2rem 0 0; }
.contact-address { font: 0.9375rem/1.5 var(--mono); overflow-wrap: anywhere; }
.menu-open .site-header[data-theme] .menu-toggle { color: var(--paper-bright); }
.menu-open .site-header .instrument-nav { background: #0b0c0a; color: var(--paper-bright); }
.menu-open .site-header .brand, .menu-open .site-header .header-signup { color: var(--paper-bright); }
.menu-open .site-header .brand-name span, .menu-open .site-header .header-signup span { color: var(--amber-bright); }

@media (max-width: 980px) {
  .system-intro, .research-layout, .experiment-heading { gap: 2rem; }
  .hero-lower { align-items: start; }
  .hero-actions { gap: 1.2rem; }
  .experiment-panels, .signal-chart { padding: 1.5rem; }
  .experiment-bottomline { align-items: start; flex-direction: column; }
  .experiment-controls button { padding: 1rem; }
}

@media (max-width: 760px) {
  :root { --gutter: clamp(1rem, 5vw, 1.5rem); --header-height: 4.5rem; }
  .instrument-nav { width: calc(100% - (var(--gutter) * 2)); min-height: 3.45rem; margin-top: 0.6rem; padding: 0.3rem 0.8rem; gap: 1rem; }
  .brand-name { display: inline; }
  .header-signup { display: none; }
  .menu-panel { top: 4.02rem; width: calc(100% - (var(--gutter) * 2)); max-height: calc(100svh - 5rem); }
  .menu-open .instrument-nav, .menu-is-open .instrument-nav, .menu-open .menu-panel, .menu-is-open .menu-panel { width: calc(100% - (var(--gutter) * 2)); }
  .menu-panel-head { min-height: 2.7rem; padding: 0.7rem 0.8rem; }
  .menu-panel-status { display: none; }
  .menu-panel-links a { min-height: 3.5rem; grid-template-columns: 2rem 1fr 2rem; padding-inline: 0.8rem; }
  .menu-row-label { font-size: 1.45rem; }
  .menu-utility a { min-height: 4rem; padding: 0.75rem; }
  .menu-utility a b { font-size: 0.9375rem; }
  .frame-letter { display: none; }
  .frame-corner { width: 0.5rem; height: 0.5rem; }
  .frame-corner-tl, .frame-corner-bl { left: 0.5rem; }
  .frame-corner-tr, .frame-corner-br { right: 0.5rem; }
  .scene-frame { padding-block: 4.5rem; }
  .scene-progress { top: 4.5rem; font-size: 0.625rem; }
  .scene-progress::before { display: none; }
  .scene-heading { font-size: 0.6875rem; padding-right: 4.5rem; }
  .heading-rule { display: none; }
  .scene-meta { flex-direction: column; gap: 0.4rem; }
  .scene-meta span:last-child { display: none; }
  .scene-hero .scene-frame { min-height: max(42rem, 100svh); padding-top: 6rem; padding-bottom: 1.5rem; }
  .hero-copy { padding-block: 2rem; }
  .eyebrow { font-size: 0.6875rem; }
  .hero-copy h1 { font-size: clamp(2.9rem, 15.4vw, 6.8rem); }
  .hero-lower { margin: 1.75rem 0 0; gap: 1.5rem; }
  .hero-deck { flex-basis: 100%; font-size: 1.0625rem; max-width: 32rem; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 1rem; }
  .scene-foot { font-size: 0.625rem; gap: 1rem; }
  .scene-foot span:last-child { text-align: right; }
  .thesis-body h2 { font-size: clamp(2.4rem, 10.5vw, 4rem); }
  .thesis-note { margin: 2rem 0 0; align-items: start; flex-direction: column; }
  .system-intro, .research-layout, .experiment-heading { display: block; margin-top: 2.5rem; }
  .system-intro h2, .research-layout h2 { font-size: clamp(2.5rem, 11vw, 4rem); }
  .system-intro > p { max-width: 32rem; margin: 1.5rem 0 0; }
  .module-row { grid-template-columns: 1.5rem 1fr 1.5rem; gap: 0.75rem; padding: 1.3rem 0.5rem; min-height: 6rem; }
  .module-description { grid-column: 2 / 4; grid-row: 2; }
  .module-arrow { grid-column: 3; grid-row: 1; }
  .module-detail { padding: 0.5rem 0.5rem 2rem 2.75rem; }
  .module-detail dl { grid-template-columns: 1fr; gap: 1.5rem; }
  .experiment-heading > p { margin-top: 1.5rem; }
  .experiment-topline { flex-direction: column; gap: 0.5rem; padding: 1rem; }
  .experiment-controls button { flex-direction: column; gap: 0.4rem; padding: 0.75rem 0.5rem; font-size: 0.875rem; min-height: 4.5rem; }
  .experiment-workspace { grid-template-columns: 1fr; }
  .experiment-panels { padding: 1.5rem 1rem; border-right: 0; }
  .example-panel { min-height: 27rem; }
  .signal-chart { padding: 1rem; border-top: 1px solid var(--line); }
  .experiment-bottomline { padding: 1rem; }
  .research-body { margin-top: 2rem; }
  .research-entry h3 { font-size: 1.5rem; }
  .contact-body h2 { font-size: clamp(2.5rem, 10vw, 4.5rem); }
  .contact-body h2 em { line-height: 1; padding: 0.04em 0.08em; }
  .contact-actions { align-items: start; flex-direction: column; gap: 1.2rem; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 2rem 1rem; }
  .footer-note { grid-column: 1 / -1; grid-row: 2; }
  .footer-links { grid-column: 2; grid-row: 1; flex-direction: column; align-items: flex-end; gap: 0.5rem; }
  .footer-wordmark { font-size: 16vw; }
  .footer-bottom { align-items: start; flex-direction: column; gap: 0.75rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; scroll-behavior: auto !important; transition: none !important; }
  .field-layer, [data-depth-word] { transform: none; }
  .loop-tracer { display: none; }
  .reveal-ready [data-reveal] { opacity: 1; transform: none; }
  .reveal-ready [data-line] { overflow: visible; padding-bottom: 0; margin-bottom: 0; }
  .reveal-ready [data-line] > .line-in { transform: none; }
}