:root {
  color-scheme: dark;
  --bg: #030608;
  --ink: #f3fff9;
  --muted: #9eb1ad;
  --line: rgba(209, 255, 238, 0.16);
  --cyan: #56f2ff;
  --green: #6effb7;
  --pink: #ff4fd8;
  --gold: #f4c96c;
  --panel: rgba(7, 13, 16, 0.66);
  --glass: rgba(255, 255, 255, 0.055);
  --mx: 0.5;
  --my: 0.5;
  --scroll: 0;
}

* {
  box-sizing: border-box;
}

html {
  height: 100%;
  min-width: 320px;
  background: var(--bg);
  scroll-behavior: smooth;
  overflow: hidden;
}

body {
  position: relative;
  height: 100%;
  min-width: 320px;
  margin: 0;
  overflow: hidden;
  background:
    linear-gradient(135deg, #020304 0%, #071013 42%, #020405 100%);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  isolation: isolate;
}

body::selection {
  background: rgba(86, 242, 255, 0.32);
  color: #ffffff;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

#shader-field,
#three-field,
#particle-field {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

#shader-field {
  z-index: 0;
}

#three-field {
  z-index: 1;
  opacity: 1;
  mix-blend-mode: normal;
}

#particle-field {
  z-index: 2;
  opacity: 0.78;
  mix-blend-mode: screen;
}

.noise {
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: 0.13;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at 50% 50%, black, transparent 78%);
}

.chromatic-veil {
  position: fixed;
  inset: -6vmax;
  z-index: 12;
  pointer-events: none;
  opacity: 0.32;
  background:
    linear-gradient(90deg, transparent 0 31%, rgba(86, 242, 255, 0.065) 33%, transparent 35% 63%, rgba(255, 79, 216, 0.055) 66%, transparent 68%),
    radial-gradient(circle at 72% 32%, rgba(255, 79, 216, 0.12), transparent 28%),
    radial-gradient(circle at 18% 76%, rgba(86, 242, 255, 0.1), transparent 26%);
  mix-blend-mode: screen;
  animation: chroma-drift 7s ease-in-out infinite alternate;
}

.scan-beam {
  position: fixed;
  left: -18vw;
  top: -20vh;
  z-index: 13;
  width: 32vw;
  height: 150vh;
  pointer-events: none;
  opacity: 0.28;
  background: linear-gradient(90deg, transparent, rgba(86, 242, 255, 0.22), rgba(110, 255, 183, 0.16), transparent);
  filter: blur(10px);
  transform: rotate(18deg) translateX(-60vw);
  animation: scan-sweep 5.4s cubic-bezier(0.78, 0, 0.22, 1) infinite;
}

.corner-hud {
  position: fixed;
  z-index: 19;
  display: grid;
  grid-template-columns: auto auto;
  gap: 2px 8px;
  min-width: 118px;
  padding: 12px 14px;
  border: 1px solid rgba(209, 255, 238, 0.14);
  border-radius: 14px;
  background: rgba(3, 9, 12, 0.46);
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(14px);
}

.corner-hud-left {
  right: clamp(18px, 4vw, 58px);
  bottom: clamp(176px, 22vh, 232px);
}

.corner-hud-right {
  right: clamp(18px, 4vw, 58px);
  bottom: clamp(96px, 13vh, 132px);
}

.corner-hud span {
  grid-column: 1 / -1;
  color: rgba(110, 255, 183, 0.82);
  font-size: 10px;
  font-weight: 900;
  text-transform: uppercase;
}

.corner-hud strong {
  color: #f7fffc;
  font: 800 28px/0.9 Space Grotesk, sans-serif;
}

.corner-hud small {
  align-self: end;
  color: rgba(223, 244, 239, 0.68);
  font-size: 10px;
  font-weight: 800;
}

.data-marquee {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 17;
  display: flex;
  gap: 0;
  overflow: hidden;
  border-top: 1px solid rgba(209, 255, 238, 0.11);
  background: rgba(1, 5, 7, 0.5);
  color: rgba(207, 255, 240, 0.5);
  font: 900 11px/1 Space Grotesk, sans-serif;
  letter-spacing: 0;
  text-transform: uppercase;
  backdrop-filter: blur(12px);
}

.data-marquee span {
  flex: 0 0 auto;
  padding: 10px 0;
  white-space: nowrap;
  animation: marquee-run 18s linear infinite;
}

.site-shell {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 20;
  padding: 22px clamp(18px, 4vw, 58px) 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-width: 0;
  padding: 12px 12px 12px 14px;
  border: 1px solid rgba(209, 255, 238, 0.13);
  border-radius: 999px;
  background: rgba(3, 7, 9, 0.48);
  box-shadow: 0 16px 80px rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(86, 242, 255, 0.46);
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, rgba(110, 255, 183, 0.32), transparent 40%),
    rgba(255, 255, 255, 0.04);
  color: #ffffff;
  font: 800 15px/1 Space Grotesk, sans-serif;
  box-shadow: inset 0 0 22px rgba(86, 242, 255, 0.16), 0 0 34px rgba(86, 242, 255, 0.16);
}

.brand-copy {
  display: grid;
  min-width: 0;
}

.brand-copy strong {
  color: #f9fffc;
  font-size: 13px;
  line-height: 1.05;
  text-transform: uppercase;
}

.brand-copy small {
  overflow: hidden;
  color: var(--muted);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid rgba(209, 255, 238, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
  color: #d9e8e4;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease, color 180ms ease;
}

.nav-links a:hover {
  border-color: rgba(86, 242, 255, 0.55);
  color: #ffffff;
}

main {
  position: fixed;
  inset: 0;
  z-index: 10;
  transform: translate3d(0, calc(var(--scene-index, 0) * -100svh), 0);
  will-change: transform;
}

.panel {
  position: relative;
  display: grid;
  height: 100svh;
  min-height: 100svh;
  overflow: hidden;
  padding: clamp(112px, 16vh, 180px) clamp(18px, 6vw, 86px) clamp(54px, 8vh, 90px);
  opacity: 0.18;
  transform: translate3d(0, 8vh, 0) scale(0.94);
  transform-origin: center;
  transition: opacity 760ms ease, transform 1100ms cubic-bezier(0.18, 0.82, 0.18, 1);
  will-change: opacity, transform;
}

.panel.is-active {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
}

.panel.is-before {
  transform: translate3d(0, -10vh, 0) scale(0.94);
}

.panel.is-after {
  transform: translate3d(0, 10vh, 0) scale(0.94);
}

.hero {
  align-items: end;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1120px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--green);
  font: 800 12px/1.2 Space Grotesk, sans-serif;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  position: relative;
  max-width: 1120px;
  margin-bottom: 28px;
  color: var(--ink);
  font-family: Space Grotesk, Inter, sans-serif;
  font-size: clamp(60px, 12.2vw, 184px);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 0.84;
  text-wrap: balance;
}

h1::before,
h1::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  z-index: -1;
  max-width: 1120px;
  pointer-events: none;
  opacity: 0;
  color: transparent;
  -webkit-text-stroke: 1px rgba(86, 242, 255, 0.22);
}

h1::before {
  transform: translate3d(-5px, 2px, 0);
  text-shadow: 8px 0 rgba(255, 79, 216, 0.4);
  animation: title-glitch-a 3.6s steps(2, end) infinite;
}

h1::after {
  transform: translate3d(6px, -2px, 0);
  text-shadow: -8px 0 rgba(110, 255, 183, 0.34);
  animation: title-glitch-b 4.1s steps(2, end) infinite;
}

h1 span {
  display: block;
  color: transparent;
  background: linear-gradient(92deg, #ffffff 0%, var(--cyan) 31%, var(--green) 64%, var(--pink) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  filter: drop-shadow(0 0 34px rgba(86, 242, 255, 0.2));
}

.hero-lede {
  max-width: 680px;
  margin-bottom: 30px;
  color: #c2d4d0;
  font-size: clamp(17px, 1.8vw, 24px);
  line-height: 1.6;
}

.hero-actions,
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.primary-action,
.ghost-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.primary-action {
  border: 1px solid rgba(110, 255, 183, 0.66);
  background: linear-gradient(135deg, rgba(110, 255, 183, 0.94), rgba(86, 242, 255, 0.86));
  color: #031011;
  box-shadow: 0 0 42px rgba(86, 242, 255, 0.25);
}

.ghost-action {
  border: 1px solid rgba(209, 255, 238, 0.17);
  background: rgba(255, 255, 255, 0.055);
  color: #e7f7f3;
  backdrop-filter: blur(12px);
}

.scroll-indicator {
  position: absolute;
  right: clamp(18px, 6vw, 86px);
  bottom: clamp(28px, 7vh, 64px);
  display: grid;
  justify-items: center;
  gap: 10px;
  color: rgba(225, 246, 240, 0.74);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}

.scroll-indicator span {
  width: 1px;
  height: 72px;
  background: linear-gradient(transparent, var(--cyan), transparent);
  animation: pulse-line 1.7s ease-in-out infinite;
}

.chapter {
  grid-template-columns: minmax(130px, 0.26fr) minmax(0, 0.76fr) minmax(320px, 0.86fr);
  align-items: center;
  gap: clamp(24px, 5vw, 72px);
}

.chapter-flip {
  grid-template-columns: minmax(130px, 0.22fr) minmax(320px, 0.9fr) minmax(0, 0.74fr);
}

.chapter-index {
  align-self: center;
  color: rgba(86, 242, 255, 0.54);
  font: 800 clamp(44px, 8vw, 120px)/0.9 Space Grotesk, sans-serif;
  text-shadow: 0 0 36px rgba(86, 242, 255, 0.24);
}

.chapter-copy {
  max-width: 760px;
}

.chapter-copy h2,
.final-copy h2 {
  margin-bottom: 22px;
  color: #f7fffc;
  font-family: Space Grotesk, Inter, sans-serif;
  font-size: clamp(38px, 6.4vw, 92px);
  line-height: 0.93;
  letter-spacing: 0;
  text-wrap: balance;
}

.chapter-copy p,
.final-copy p {
  max-width: 620px;
  color: #bbceca;
  font-size: clamp(16px, 1.55vw, 21px);
  line-height: 1.68;
}

.signal-grid {
  display: grid;
  gap: 14px;
}

#stack {
  grid-template-columns: minmax(44vw, 1fr) minmax(420px, 0.78fr);
  grid-template-rows: minmax(0, 0.48fr) auto auto minmax(0, 0.16fr);
  grid-template-areas:
    "index ."
    "index copy"
    "index cards"
    ". .";
  align-content: stretch;
  align-items: end;
  column-gap: clamp(36px, 5vw, 82px);
  row-gap: clamp(16px, 2.6vh, 28px);
  padding-left: clamp(22px, 5vw, 72px);
  padding-right: clamp(36px, 7vw, 112px);
  padding-top: clamp(124px, 16vh, 170px);
}

#stack .chapter-copy {
  grid-area: copy;
  justify-self: end;
  width: min(560px, 100%);
  max-width: 560px;
  margin-left: 0;
  text-align: right;
  z-index: 3;
}

#stack .chapter-copy h2 {
  font-size: clamp(38px, 4.8vw, 68px);
  line-height: 0.96;
}

#stack .chapter-copy p {
  max-width: 520px;
  margin-left: auto;
}

#stack .chapter-index {
  grid-area: index;
  align-self: end;
  justify-self: start;
  margin-bottom: clamp(22px, 7vh, 78px);
  opacity: 0.58;
}

#stack .signal-grid {
  grid-area: cards;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  justify-self: end;
  width: min(560px, 100%);
  margin-top: -22px;
  z-index: 3;
}

#stack .signal-card:first-child {
  grid-column: 1 / -1;
}

#stack .signal-card {
  padding: 15px 16px;
}

#stack .signal-card span {
  margin-bottom: 10px;
}

#stack .signal-card strong {
  margin-bottom: 6px;
  font-size: 21px;
}

#stack .signal-card p {
  font-size: 13px;
  line-height: 1.42;
}

.signal-card,
.terminal-card {
  position: relative;
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(140deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.026)),
    var(--panel);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.36);
  overflow: hidden;
  backdrop-filter: blur(18px);
  transform-style: preserve-3d;
}

.signal-card::before,
.terminal-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  opacity: 0;
  background: radial-gradient(circle at var(--card-x, 50%) var(--card-y, 50%), rgba(86, 242, 255, 0.28), transparent 34%);
  transition: opacity 160ms ease;
}

.signal-card:hover::before,
.terminal-card:hover::before {
  opacity: 1;
}

.signal-card span {
  position: relative;
  display: inline-flex;
  margin-bottom: 32px;
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.signal-card strong {
  position: relative;
  display: block;
  margin-bottom: 10px;
  color: #f8fffd;
  font: 700 24px/1.08 Space Grotesk, sans-serif;
}

.signal-card p {
  position: relative;
  margin: 0;
  color: #9fb3af;
  font-size: 14px;
  line-height: 1.62;
}

.kinetic-type {
  display: grid;
  gap: 12px;
  transform: perspective(900px) rotateY(calc((var(--mx) - 0.5) * -16deg));
}

.kinetic-type span {
  display: block;
  color: transparent;
  background:
    linear-gradient(92deg, rgba(255, 255, 255, 0.94), rgba(86, 242, 255, 0.9), rgba(255, 79, 216, 0.82));
  -webkit-background-clip: text;
  background-clip: text;
  font: 800 clamp(48px, 8vw, 112px)/0.86 Space Grotesk, sans-serif;
  letter-spacing: 0;
  filter: drop-shadow(0 0 30px rgba(86, 242, 255, 0.18));
  transform: translateX(calc((var(--scroll) - 0.5) * 32px));
}

.kinetic-type span:nth-child(even) {
  transform: translateX(calc((0.5 - var(--scroll)) * 42px));
}

#motion {
  grid-template-columns: minmax(96px, 0.18fr) minmax(0, 560px) minmax(34vw, 1fr);
  grid-template-rows: minmax(0, 0.18fr) auto minmax(18px, 0.08fr) auto minmax(0, 0.18fr);
  grid-template-areas:
    "index . ."
    "index kinetic ."
    "index . ."
    "index copy ."
    "index . .";
  align-content: stretch;
  align-items: start;
  column-gap: clamp(22px, 4vw, 58px);
  row-gap: 0;
  padding-top: clamp(176px, 23vh, 220px);
  padding-right: clamp(24px, 8vw, 112px);
}

#motion .kinetic-type {
  grid-area: kinetic;
  max-width: 560px;
  z-index: 3;
}

#motion .kinetic-type span {
  font-size: clamp(48px, 6.6vw, 88px);
}

#motion .chapter-copy {
  grid-area: copy;
  width: min(620px, 100%);
  max-width: 620px;
  z-index: 3;
}

#motion .chapter-copy h2 {
  font-size: clamp(34px, 4.2vw, 58px);
  line-height: 0.98;
}

#motion .chapter-copy p {
  max-width: 580px;
}

.final-panel {
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.52fr);
  grid-template-areas:
    "index copy"
    "index terminal";
  align-content: start;
  justify-items: end;
  gap: clamp(14px, 2.4vw, 28px);
  padding-left: clamp(18px, 5vw, 70px);
  padding-right: clamp(190px, 15vw, 240px);
  padding-top: clamp(118px, 14vh, 150px);
}

.final-copy {
  grid-area: copy;
  width: min(500px, 100%);
  max-width: 500px;
  text-align: right;
}

.final-panel .chapter-index {
  grid-area: index;
  align-self: end;
  justify-self: start;
  margin-left: clamp(0px, 3vw, 42px);
  margin-bottom: clamp(18px, 5vh, 72px);
  opacity: 0.58;
}

.final-copy .eyebrow {
  color: var(--pink);
}

.final-copy h2 {
  margin-bottom: 18px;
  font-size: clamp(38px, 3.8vw, 54px);
  line-height: 0.98;
}

.final-copy p {
  margin-left: auto;
  font-size: clamp(15px, 1.28vw, 18px);
  line-height: 1.52;
}

.signal-signature {
  display: inline-grid;
  grid-template-columns: auto auto;
  gap: 4px 12px;
  min-width: min(300px, 100%);
  margin-top: 6px;
  padding: 12px 14px;
  border: 1px solid rgba(110, 255, 183, 0.18);
  border-radius: 8px;
  background: rgba(3, 9, 12, 0.42);
  box-shadow: inset 0 0 28px rgba(86, 242, 255, 0.055);
  text-align: left;
}

.signal-signature span {
  grid-column: 1 / -1;
  color: rgba(110, 255, 183, 0.74);
  font: 900 10px/1.1 Space Grotesk, sans-serif;
  text-transform: uppercase;
}

.signal-signature strong {
  color: #f7fffc;
  font: 800 22px/0.95 Space Grotesk, sans-serif;
  text-transform: uppercase;
}

.signal-signature small {
  align-self: end;
  color: rgba(223, 244, 239, 0.66);
  font-size: 11px;
  font-weight: 800;
}

.terminal-card {
  grid-area: terminal;
  width: min(410px, 100%);
  min-height: 320px;
  justify-self: end;
}

.final-panel .terminal-card {
  min-height: 164px;
  padding: 18px;
  background:
    linear-gradient(140deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.02)),
    rgba(7, 12, 16, 0.58);
}

#contact .terminal-card {
  border-color: rgba(255, 79, 216, 0.2);
}

.final-panel .terminal-bar {
  margin-bottom: 18px;
}

.terminal-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
}

.terminal-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--pink);
  box-shadow: 0 0 18px rgba(255, 79, 216, 0.6);
}

.terminal-bar span:nth-child(2) {
  background: var(--gold);
  box-shadow: 0 0 18px rgba(244, 201, 108, 0.6);
}

.terminal-bar span:nth-child(3) {
  background: var(--green);
  box-shadow: 0 0 18px rgba(110, 255, 183, 0.6);
}

pre {
  position: relative;
  margin: 0;
  color: #dffdf1;
  font-size: clamp(15px, 1.35vw, 19px);
  line-height: 1.7;
  white-space: pre-wrap;
}

.progress-rail {
  position: fixed;
  right: clamp(14px, 2vw, 28px);
  top: 50%;
  z-index: 18;
  display: grid;
  gap: 12px;
  transform: translateY(-50%);
}

.progress-rail::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -70px;
  width: 1px;
  height: 54px;
  background: rgba(209, 255, 238, 0.12);
}

.progress-fill {
  position: absolute;
  left: 50%;
  top: -70px;
  width: 1px;
  height: calc(var(--scroll) * 54px);
  background: linear-gradient(var(--cyan), var(--green));
  transform: translateX(-50%);
}

.progress-rail a {
  width: 10px;
  height: 10px;
  border: 1px solid rgba(209, 255, 238, 0.3);
  border-radius: 50%;
  background: rgba(4, 10, 12, 0.74);
}

.progress-rail a.is-active {
  border-color: var(--green);
  background: var(--green);
  box-shadow: 0 0 22px rgba(110, 255, 183, 0.68);
}

.magnetic {
  transform: translate3d(var(--mag-x, 0), var(--mag-y, 0), 0);
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
  will-change: transform;
}

@keyframes pulse-line {
  0%,
  100% {
    transform: scaleY(0.65);
    opacity: 0.45;
  }
  50% {
    transform: scaleY(1);
    opacity: 1;
  }
}

@keyframes chroma-drift {
  from {
    transform: translate3d(-1.5vw, -1vh, 0) rotate(-1deg);
  }
  to {
    transform: translate3d(1.5vw, 1vh, 0) rotate(1deg);
  }
}

@keyframes scan-sweep {
  0%,
  48% {
    transform: rotate(18deg) translateX(-64vw);
  }
  68%,
  100% {
    transform: rotate(18deg) translateX(164vw);
  }
}

@keyframes marquee-run {
  to {
    transform: translateX(-100%);
  }
}

@keyframes title-glitch-a {
  0%,
  88%,
  100% {
    opacity: 0;
    clip-path: inset(0 0 0 0);
  }
  90% {
    opacity: 0.85;
    clip-path: inset(8% 0 64% 0);
  }
  92% {
    opacity: 0.5;
    clip-path: inset(72% 0 9% 0);
  }
}

@keyframes title-glitch-b {
  0%,
  78%,
  100% {
    opacity: 0;
    clip-path: inset(0 0 0 0);
  }
  80% {
    opacity: 0.76;
    clip-path: inset(48% 0 22% 0);
  }
  82% {
    opacity: 0.45;
    clip-path: inset(14% 0 70% 0);
  }
}

@media (max-width: 980px) {
  .chapter,
  .chapter-flip,
  .final-panel {
    grid-template-columns: 1fr;
    align-items: start;
  }

  #stack,
  #motion {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    grid-template-areas: none;
  }

  #stack .chapter-index,
  #stack .chapter-copy,
  #stack .signal-grid,
  #motion .kinetic-type,
  #motion .chapter-copy {
    grid-area: auto;
    grid-column: auto;
    grid-row: auto;
  }

  #stack .chapter-copy {
    margin-left: 0;
    text-align: left;
  }

  #stack {
    align-content: end;
    padding-top: clamp(260px, 38vh, 360px);
    padding-right: clamp(22px, 7vw, 72px);
  }

  #stack .chapter-copy {
    justify-self: end;
    width: min(520px, 70vw);
    max-width: 520px;
    text-align: right;
  }

  #stack .chapter-copy p {
    max-width: 440px;
  }

  #stack .signal-grid {
    justify-self: end;
    width: min(620px, 100%);
    margin-top: 0;
  }

  #stack .signal-card:first-child {
    grid-column: auto;
  }

  #motion {
    align-content: center;
    padding-top: clamp(170px, 26vh, 260px);
    padding-right: clamp(18px, 7vw, 72px);
  }

  #motion .chapter-copy {
    width: min(560px, 72vw);
    max-width: 560px;
  }

  .final-panel {
    grid-template-areas:
      "index"
      "copy"
      "terminal";
    justify-items: start;
    padding-right: clamp(18px, 6vw, 86px);
  }

  .final-copy {
    width: min(640px, 100%);
    text-align: left;
  }

  .final-copy p {
    margin-left: 0;
  }

  .final-panel .chapter-index,
  .final-panel .terminal-card {
    justify-self: start;
    margin-left: 0;
  }

  .chapter-index {
    font-size: 48px;
  }

  .signal-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .terminal-card {
    min-height: 260px;
  }
}

@media (max-width: 760px) {
  .site-shell {
    padding: 12px 12px 0;
  }

  .topbar {
    width: 100%;
    min-width: 0;
    border-radius: 22px;
  }

  .brand {
    flex: 1 1 auto;
  }

  .brand-copy small {
    display: none;
  }

  .nav-links a {
    display: none;
  }

  .panel {
    min-height: 100svh;
    overflow: hidden;
    padding: 104px 18px 56px;
  }

  .chapter-copy,
  .final-copy {
    position: relative;
    z-index: 3;
    width: 100%;
    max-width: calc(100vw - 36px);
    min-width: 0;
  }

  .hero-content {
    width: calc(100vw - 36px);
    max-width: calc(100vw - 36px);
    min-width: 0;
  }

  h1 {
    max-width: 100%;
    font-size: clamp(48px, 15.8vw, 66px);
  }

  h1 span {
    max-width: 7ch;
  }

  .hero-lede {
    font-size: 16px;
  }

  .hero-actions {
    width: 100%;
    max-width: 340px;
  }

  .primary-action,
  .ghost-action {
    flex: 1 1 100%;
    width: 100%;
    min-width: 0;
  }

  .signal-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .chapter,
  .chapter-flip,
  .final-panel {
    align-content: center;
    gap: 14px;
  }

  #stack {
    align-content: start;
    gap: 12px;
    padding-top: 28vh;
  }

  #stack .chapter-copy {
    justify-self: stretch;
    box-sizing: border-box;
    width: calc(100vw - 36px) !important;
    max-width: calc(100vw - 36px) !important;
    margin-left: 0;
    padding-left: clamp(118px, 36vw, 152px);
  }

  #stack .chapter-copy h2 {
    font-size: clamp(27px, 7.8vw, 36px);
  }

  #stack .chapter-copy p {
    max-width: min(236px, 62vw);
    margin-left: auto;
  }

  #stack .signal-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    justify-self: stretch;
    width: calc(100vw - 36px) !important;
    max-width: calc(100vw - 36px) !important;
  }

  #stack .signal-card:first-child {
    grid-column: 1 / -1;
  }

  #stack .signal-card {
    padding: 13px 15px;
  }

  #stack .signal-card span {
    margin-bottom: 8px;
  }

  #motion {
    align-content: start;
    gap: 12px;
    padding-top: 24vh;
  }

  #motion .chapter-copy {
    width: min(326px, 78vw);
    max-width: 326px;
  }

  #motion .chapter-copy h2 {
    font-size: clamp(30px, 8.8vw, 40px);
  }

  .final-panel {
    align-content: end;
    padding-top: 42vh;
  }

  .final-copy {
    text-align: left;
  }

  .signal-signature {
    min-width: 0;
    width: min(330px, 100%);
    margin-top: 2px;
  }

  #contact .terminal-card {
    width: min(360px, 100%);
    min-height: 152px;
    padding: 14px;
  }

  .chapter-index {
    display: none;
  }

  .chapter-copy h2,
  .final-copy h2 {
    margin-bottom: 12px;
    font-size: clamp(32px, 10vw, 44px);
    line-height: 0.98;
  }

  .chapter-copy p,
  .final-copy p {
    width: 100%;
    max-width: min(320px, calc(100vw - 44px));
    font-size: 14px;
    line-height: 1.5;
    overflow-wrap: anywhere;
  }

  .signal-card,
  .terminal-card {
    padding: 15px;
  }

  .signal-card span {
    margin-bottom: 10px;
  }

  .signal-card strong {
    margin-bottom: 4px;
    font-size: 18px;
  }

  .signal-card p {
    font-size: 13px;
    line-height: 1.42;
  }

  .kinetic-type {
    display: none;
  }

  .terminal-card {
    min-height: 180px;
  }

  .terminal-bar {
    margin-bottom: 18px;
  }

  .scroll-indicator,
  .progress-rail,
  .corner-hud,
  .data-marquee {
    display: none;
  }

  #three-field {
    opacity: 0.92;
  }

  .chromatic-veil,
  .scan-beam {
    opacity: 0.18;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  .chromatic-veil,
  .scan-beam,
  .data-marquee {
    opacity: 0.08;
  }
}

@media (max-width: 420px) {
  .brand-copy strong {
    max-width: 78px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

}

/* ---- help panel ---- */

.help-panel {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms ease;
}

.help-panel.is-open {
  opacity: 1;
  pointer-events: auto;
}

.help-panel-inner {
  position: relative;
  width: min(440px, 90vw);
  max-height: 80vh;
  overflow-y: auto;
  padding: clamp(28px, 5vw, 44px);
  border-radius: 18px;
  background: rgba(5, 13, 18, 0.96);
  border: 1px solid rgba(209, 255, 238, 0.14);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  color: #e8fff8;
  transform: translateY(12px) scale(0.97);
  transition: transform 280ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.help-panel.is-open .help-panel-inner {
  transform: translateY(0) scale(1);
}

body[data-surface="raycast"][data-raycast-theme="light"] .help-panel-inner,
body[data-surface="raycast"]:not([data-raycast-theme="dark"]) .help-panel-inner {
  background: rgba(251, 252, 253, 0.98);
  border-color: rgba(13, 19, 23, 0.1);
  color: #0d1317;
}

.help-panel-inner h2 {
  margin: 0 0 20px;
  font: 700 24px/1 "Space Grotesk", sans-serif;
  letter-spacing: -0.02em;
}

.help-panel-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid rgba(209, 255, 238, 0.2);
  border-radius: 999px;
  background: transparent;
  color: inherit;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

body[data-surface="raycast"]:not([data-raycast-theme="dark"]) .help-panel-close {
  border-color: rgba(13, 19, 23, 0.16);
}

.help-list {
  display: grid;
  gap: 12px;
  margin: 0;
}

.help-list dt {
  display: flex;
  gap: 4px;
  align-items: center;
  font: 700 13px/1 "Space Grotesk", monospace;
  opacity: 0.7;
}

.help-list dd {
  margin: 0 0 16px;
  font: 500 14px/1.4 Inter, sans-serif;
  opacity: 0.85;
}

.help-list kbd {
  display: inline-block;
  min-width: 22px;
  padding: 4px 7px;
  border: 1px solid currentColor;
  border-radius: 5px;
  font: 800 11px/1 "Space Grotesk", sans-serif;
  text-align: center;
  opacity: 0.9;
}

.help-hint {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(209, 255, 238, 0.12);
  font: 500 12px/1.4 Inter, sans-serif;
  opacity: 0.55;
}

body[data-surface="raycast"]:not([data-raycast-theme="dark"]) .help-hint {