:root {
  --bg: #050b14;
  --panel: #081526;
  --ink: #f2f4f6;
  --muted: #909ba6;
  --line: rgba(220, 230, 239, .14);
  --signal: #7fa9cf;
  --signal-dim: rgba(127, 169, 207, .13);
  --warm: #a8bac9;
  --pad: max(clamp(1.5rem, 4vw, 4rem), calc((100vw - 1360px) / 2));
  --sans: "DM Sans", system-ui, sans-serif;
  --mono: "Space Mono", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 6rem; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.55;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  opacity: .15;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.15'/%3E%3C/svg%3E");
}
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
::selection { background: var(--signal); color: var(--bg); }

.skip-link { position: fixed; left: -999px; }
.skip-link:focus { left: 1rem; top: 1rem; z-index: 100; background: var(--ink); color: var(--bg); padding: .7rem 1rem; }

.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 15;
  height: 5.5rem;
  padding: 0 var(--pad);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  transition: background .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled { background: rgba(6, 8, 13, .84); backdrop-filter: blur(14px); border-color: var(--line); }
.brand { display: inline-flex; align-items: center; gap: .65rem; width: fit-content; font-weight: 600; letter-spacing: -.06em; font-size: 1.35rem; }
.brand b { color: var(--signal); font-weight: 600; }
.brand i { width: .45rem; height: .45rem; border-radius: 50%; background: var(--signal); box-shadow: 0 0 12px rgba(127,169,207,.4); }
.nav-links { display: flex; gap: 2.2rem; }
.nav-links a, .nav-contact {
  font-family: var(--mono);
  font-size: .65rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  transition: color .2s;
}
.nav-links a:hover, .nav-contact:hover { color: var(--ink); }
.nav-contact { justify-self: end; color: var(--ink); }
.nav-contact span { color: var(--signal); margin-left: .35rem; }
.nav-toggle { display: none; border: 0; background: none; width: 2rem; }
.nav-toggle span { display: block; height: 1px; background: var(--ink); margin: .45rem 0; transition: transform .3s; }
.nav-toggle.open span:first-child { transform: translateY(4px) rotate(45deg); }
.nav-toggle.open span:last-child { transform: translateY(-4px) rotate(-45deg); }
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 14;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--pad);
  gap: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s;
}
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-menu a { font-size: clamp(2rem, 8vw, 4rem); letter-spacing: -.05em; }

.overline {
  font-family: var(--mono);
  color: var(--signal);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .66rem;
}
.section-no {
  font-family: var(--mono);
  color: var(--muted);
  font-size: .68rem;
  letter-spacing: .1em;
}

.hero {
  position: relative;
  min-height: 100svh;
  padding: 9rem var(--pad) 3rem;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
#scene { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.hero-shade {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(5,11,20,.97) 0%, rgba(5,11,20,.76) 45%, rgba(5,11,20,.08) 75%),
    linear-gradient(0deg, var(--bg), transparent 24%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; width: min(760px, 68vw); }
.hero h1 {
  margin-top: 1.8rem;
  font-size: clamp(3.1rem, 5.5vw, 5.8rem);
  line-height: .97;
  letter-spacing: -.065em;
  font-weight: 500;
}
.hero h1 em, .signature-copy h2 em, .contact h2 em {
  color: var(--signal);
  font-style: normal;
}
.hero-lede {
  width: min(570px, 80%);
  margin-top: 2.2rem;
  font-size: clamp(1rem, 1.35vw, 1.2rem);
  color: #b4b9b8;
  line-height: 1.65;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-bottom: .35rem;
  border-bottom: 1px solid var(--signal);
  font-family: var(--mono);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.text-link span { color: var(--signal); transition: transform .2s; }
.text-link:hover span { transform: translateY(4px); }
.hero-index {
  position: absolute;
  z-index: 2;
  left: var(--pad);
  right: var(--pad);
  bottom: 1.4rem;
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  color: #596162;
  font-size: .57rem;
  letter-spacing: .12em;
}

.manifesto, .oxford, .system, .signature, .proof, .contact {
  padding: clamp(5.5rem, 8vw, 8.5rem) var(--pad);
  border-bottom: 1px solid var(--line);
}
.manifesto {
  position: relative;
  background: var(--ink);
  color: var(--bg);
}
.manifesto .section-no { position: absolute; top: clamp(5.5rem, 8vw, 8.5rem); right: var(--pad); color: #737a77; }
.manifesto .overline { color: #315d83; }
.manifesto h2, .system h2, .signature h2, .proof h2, .contact h2 {
  margin-top: 1.5rem;
  font-weight: 500;
  letter-spacing: -.065em;
  line-height: .98;
}
.manifesto h2 { font-size: clamp(3rem, 5.6vw, 6rem); max-width: 1100px; }
.manifesto h2 span { color: #9da39f; }
.manifesto-detail {
  margin: clamp(3rem, 7vw, 7rem) 0 0 auto;
  width: min(680px, 62%);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
}
.manifesto-detail p { color: #525957; font-size: clamp(1rem, 1.35vw, 1.18rem); }

/* Education pilot: authentic learning and gaming imagery */
.oxford { background: #06182a; }
.oxford-head {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 8vw;
  align-items: end;
}
.oxford h2 {
  margin-top: 1.5rem;
  font-size: clamp(3rem, 5.2vw, 5.6rem);
  font-weight: 500;
  letter-spacing: -.065em;
  line-height: .98;
}
.oxford h2 em { color: var(--warm); font-style: normal; }
.oxford-images {
  display: grid;
  grid-template-columns: 1.5fr .7fr;
  gap: clamp(1rem, 2.4vw, 2.5rem);
  align-items: end;
  margin-top: clamp(4rem, 8vw, 8rem);
}
.oxford figure { margin: 0; }
.oxford-primary { aspect-ratio: 1.65; }
.oxford-secondary { aspect-ratio: .82; transform: translateY(12%); }
.oxford figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.58) contrast(1.08);
  transition: filter .5s, transform .7s cubic-bezier(.2,.7,.2,1);
}
.oxford figure { overflow: hidden; position: relative; }
.oxford figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 55%, rgba(5,11,20,.72));
}
.oxford figure:hover img { filter: saturate(.9) contrast(1.03); transform: scale(1.015); }
.oxford figcaption {
  position: absolute;
  z-index: 2;
  inset: auto 1rem .85rem;
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
}
.oxford figcaption span { color: var(--ink); font-size: .62rem; }
.oxford figcaption small { color: #a7afaa; font-size: .48rem; text-align: right; }
.pilot-pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: clamp(6rem, 10vw, 10rem);
  border-top: 1px solid var(--line);
}
.pilot-pillars > div { padding: 1.5rem 1.3rem 1.5rem 0; border-right: 1px solid var(--line); }
.pilot-pillars > div:not(:first-child) { padding-left: 1.3rem; }
.pilot-pillars > div:last-child { border-right: 0; }
.pilot-pillars span { color: #657069; font-family: var(--mono); font-size: .56rem; }
.pilot-pillars h3 { margin-top: 2.2rem; font-size: 1.35rem; font-weight: 500; letter-spacing: -.03em; }
.pilot-pillars p { margin-top: .55rem; color: var(--muted); font-size: .88rem; }
.oxford-note {
  width: min(680px, 75%);
  margin: 3rem 0 0 auto;
  padding-left: 1.2rem;
  border-left: 1px solid var(--warm);
  color: #aab0aa;
}

.system { background: var(--bg); }
.section-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8vw;
  align-items: end;
}
.system h2 { font-size: clamp(3.3rem, 5.3vw, 5.7rem); }
.section-intro { max-width: 520px; color: var(--muted); font-size: clamp(1rem, 1.4vw, 1.25rem); }
.sequence { list-style: none; margin-top: clamp(4rem, 8vw, 8rem); border-top: 1px solid var(--line); }
.sequence li {
  display: grid;
  grid-template-columns: 8vw 9vw 1fr;
  gap: 2rem;
  padding: 2.2rem 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.step-no { font-family: var(--mono); color: #5f6868; font-size: .65rem; padding-top: .45rem; }
.step-mark { height: 2.7rem; display: flex; align-items: center; position: relative; }
.step-mark::before { content: ""; height: 1px; width: 100%; background: #2f3838; }
.step-mark i { position: absolute; left: 0; width: .5rem; height: .5rem; border-radius: 50%; background: var(--signal); box-shadow: 0 0 8px rgba(127,169,207,.35); transition: left .7s cubic-bezier(.2,.7,.2,1); }
.sequence li:hover .step-mark i { left: calc(100% - .5rem); }
.sequence li > div:last-child { display: grid; grid-template-columns: .7fr 1.3fr; gap: 3rem; }
.sequence h3 { font-size: clamp(1.6rem, 2.7vw, 2.7rem); font-weight: 500; letter-spacing: -.045em; }
.sequence p { color: var(--muted); max-width: 470px; }

.signature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 900px;
  padding-left: var(--pad);
  gap: 5vw;
  align-items: center;
  background: var(--panel);
}
.signature-visual { display: flex; flex-direction: column; justify-content: center; min-height: 590px; padding-right: 5vw; border-right: 1px solid var(--line); }
.spectral-panel {
  width: 100%;
  max-width: 640px;
  border: 1px solid rgba(127,169,207,.22);
  background: #07111d;
  box-shadow: 0 28px 80px rgba(0,0,0,.3), inset 0 0 50px rgba(127,169,207,.025);
  overflow: visible;
}
.signature-ui-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.25rem 1.35rem;
  border-bottom: 1px solid var(--line);
}
.signature-ui-head span, .spectral-meta, .concept-caption {
  font-family: var(--mono);
  font-size: .55rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: #687581;
}
.signature-ui-head strong { display: block; margin-top: .45rem; font-size: 1.15rem; font-weight: 500; letter-spacing: -.025em; }
.signature-ui-head i { padding: .35rem .55rem; border: 1px solid rgba(127,169,207,.28); color: var(--signal); font-family: var(--mono); font-size: .52rem; font-style: normal; text-transform: uppercase; letter-spacing: .07em; }
.spectral-meta { display: flex; justify-content: space-between; gap: 1rem; padding: .75rem 1.35rem; border-bottom: 1px solid var(--line); }
.spectral-body { display: grid; grid-template-columns: minmax(260px, 1fr) 200px; gap: 1.1rem; align-items: center; padding: 1.1rem 1.25rem 1.25rem; overflow: visible; }
.spectral-chart { display: block; width: 100%; height: auto; overflow: visible; }
.spectral-grid circle, .spectral-grid line { fill: none; stroke: rgba(220,230,239,.12); stroke-width: 1; vector-effect: non-scaling-stroke; }
.spectral-grid circle:first-child { stroke: rgba(127,169,207,.28); }
.spectral-axis-labels text {
  fill: #9ba9b5;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .06em;
}
.spectral-axis-labels tspan { fill: inherit; }
.spectral-previous { fill: rgba(127,169,207,.035); stroke: rgba(127,169,207,.25); stroke-width: 1.4; stroke-dasharray: 4 5; vector-effect: non-scaling-stroke; }
.spectral-current {
  fill: url(#signatureFill);
  stroke: var(--signal);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
  filter: drop-shadow(0 0 5px rgba(127,169,207,.25));
  stroke-dasharray: 900;
  stroke-dashoffset: 900;
  animation: signature-draw 1.8s cubic-bezier(.2,.7,.2,1) forwards;
}
.spectral-points circle { fill: #a8bac9; stroke: #07111d; stroke-width: 2; transform-box: fill-box; transform-origin: center; animation: spectral-point 3s ease-in-out infinite; }
.spectral-points circle:nth-child(2) { animation-delay: -.5s; }.spectral-points circle:nth-child(3) { animation-delay: -1s; }
.spectral-points circle:nth-child(4) { animation-delay: -1.5s; }.spectral-points circle:nth-child(5) { animation-delay: -2s; }
.spectral-legend { list-style: none; }
.spectral-legend li { display: grid; grid-template-columns: 1fr auto; gap: .55rem .7rem; padding: .85rem 0; border-bottom: 1px solid rgba(220,230,239,.09); }
.spectral-legend li:last-child { border-bottom: 0; }
.spectral-legend span { font-size: .72rem; color: #aeb8c0; line-height: 1.3; }
.spectral-legend span b { display: inline-block; width: 1.6rem; color: #536270; font-family: var(--mono); font-size: .48rem; font-weight: 400; }
.spectral-legend strong { color: var(--signal); font-family: var(--mono); font-size: .58rem; font-weight: 400; }
.spectral-legend i { grid-column: 1 / -1; display: block; height: 2px; margin-top: .15rem; background: rgba(220,230,239,.07); }
.spectral-legend i::after { content: ""; display: block; width: calc(var(--e) * 100%); height: 100%; background: var(--signal); opacity: .7; }
.spectral-foot { display: flex; justify-content: space-between; gap: 1rem; padding: .8rem 1.35rem; border-top: 1px solid var(--line); font-family: var(--mono); color: #687581; font-size: .48rem; text-transform: uppercase; letter-spacing: .06em; }
.spectral-foot span:first-child::before, .spectral-foot span:nth-child(2)::before { content: ""; display: inline-block; width: 14px; margin-right: .4rem; border-top: 1px dashed rgba(127,169,207,.4); vertical-align: middle; }
.spectral-foot span:nth-child(2)::before { border-top-style: solid; border-color: var(--signal); }
.concept-caption { width: 100%; max-width: 640px; margin-top: .75rem; text-align: right; color: #505d68; }
@keyframes signature-draw { to { stroke-dashoffset: 0; } }
@keyframes spectral-point { 0%, 100% { transform: scale(.85); opacity: .7; } 50% { transform: scale(1.15); opacity: 1; } }
.signature-copy { padding-right: 0; }
.signature-copy h2 { font-size: clamp(3.2rem, 5vw, 5.4rem); }
.signature-copy > p:not(.overline) { color: var(--muted); margin-top: 2.5rem; max-width: 550px; font-size: 1.08rem; }
.signature-copy > .framework-note {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: #7f8888;
  font-size: .78rem;
  line-height: 1.65;
}
.framework-note a { color: #aeb9c4; text-decoration: underline; text-decoration-color: rgba(127,169,207,.42); text-underline-offset: 3px; }
.framework-note a:hover { color: var(--signal); }
.audiences { margin-top: 3.5rem; border-top: 1px solid var(--line); }
.audiences > div { display: grid; grid-template-columns: 1fr 1.5fr; gap: 2rem; padding: 1.25rem 0; border-bottom: 1px solid var(--line); }
.audiences span { font-family: var(--mono); color: var(--signal); font-size: .63rem; text-transform: uppercase; letter-spacing: .08em; }
.audiences p { color: var(--muted); font-size: .92rem; }

.proof { background: var(--warm); color: #101b25; }
.proof .overline { color: #354f65; }
.proof-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 6vw; align-items: end; margin-top: 2rem; }
.proof h2 { font-size: clamp(3rem, 5vw, 5.4rem); }
.proof-grid > p { color: #344858; font-size: 1.1rem; }
.proof ul { list-style: none; border-top: 1px solid rgba(16,27,37,.25); }
.proof li { padding: .85rem 0; border-bottom: 1px solid rgba(16,27,37,.25); font-family: var(--mono); font-size: .66rem; text-transform: uppercase; letter-spacing: .08em; }
.neet-note {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 6vw;
  align-items: start;
  margin-top: clamp(4rem, 7vw, 7rem);
  padding-top: clamp(2rem, 4vw, 3.5rem);
  border-top: 1px solid rgba(16,27,37,.28);
}
.neet-note strong { font-size: clamp(4rem, 8vw, 8rem); line-height: .8; font-weight: 500; letter-spacing: -.07em; }
.neet-note span { display: block; font-family: var(--mono); font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; }
.neet-note p { max-width: 710px; margin-top: 1rem; color: #344858; font-size: 1.05rem; }
.neet-note a { display: inline-block; margin-top: 1.2rem; color: #243c50; font-family: var(--mono); font-size: .58rem; text-transform: uppercase; letter-spacing: .06em; border-bottom: 1px solid rgba(16,27,37,.4); }

.contact { min-height: 80svh; display: flex; flex-direction: column; justify-content: space-between; }
.contact-top, .contact-bottom { display: flex; justify-content: space-between; align-items: flex-start; }
.contact h2 { font-size: clamp(4rem, 7.7vw, 8rem); max-width: 1200px; }
.contact-bottom { align-items: end; }
.contact-bottom > p { color: var(--muted); max-width: 380px; }
.contact-mail { font-size: clamp(1.3rem, 2.5vw, 2.4rem); letter-spacing: -.035em; border-bottom: 1px solid var(--signal); padding-bottom: .3rem; }
.contact-mail span { color: var(--signal); }

footer {
  padding: 2rem var(--pad);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .58rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}
footer p:last-child { justify-self: end; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1); transition-delay: var(--delay, 0s); }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .nav { grid-template-columns: 1fr auto; }
  .nav-links, .nav-contact { display: none; }
  .nav-toggle { display: block; justify-self: end; }
  .hero-content { width: 92%; }
  .hero-shade { background: linear-gradient(90deg, rgba(5,11,20,.96), rgba(5,11,20,.48)), linear-gradient(0deg, var(--bg), transparent 24%); }
  .manifesto { grid-template-columns: 1fr; gap: 2rem; }
  .manifesto-detail { width: 100%; }
  .oxford-head, .section-head, .signature, .proof-grid { grid-template-columns: 1fr; }
  .section-head { gap: 2.5rem; }
  .signature { min-height: auto; }
  .signature-visual { padding-right: 0; padding-bottom: 4rem; border-right: 0; border-bottom: 1px solid var(--line); min-height: 560px; }
  .signature-copy { padding: 3rem 0 0; }
  .proof-grid { align-items: start; }
  .neet-note { grid-template-columns: 1fr; gap: 2.5rem; }
  .sequence li { grid-template-columns: 3rem 6rem 1fr; }
  .sequence li > div:last-child { grid-template-columns: 1fr; gap: .5rem; }
  .pilot-pillars { grid-template-columns: 1fr 1fr; }
  .pilot-pillars > div:nth-child(2) { border-right: 0; }
  .pilot-pillars > div:nth-child(n+3) { border-top: 1px solid var(--line); }
}

@media (max-width: 600px) {
  .nav { height: 4.5rem; }
  .hero { padding-top: 7rem; }
  .hero h1 { font-size: clamp(2.8rem, 13vw, 4.6rem); }
  .hero-lede { width: 100%; }
  .hero-index span:nth-child(2) { display: none; }
  .manifesto, .oxford, .system, .signature, .proof, .contact { padding-block: 5.5rem; }
  .manifesto-detail { grid-template-columns: 1fr; }
  .manifesto-detail { width: 100%; }
  .oxford-images { grid-template-columns: 1fr; }
  .oxford-primary { aspect-ratio: 1.25; }
  .oxford-secondary { width: 72%; aspect-ratio: .85; margin-left: auto; transform: translateY(-7%); }
  .pilot-pillars { grid-template-columns: 1fr; margin-top: 2rem; }
  .pilot-pillars > div, .pilot-pillars > div:not(:first-child) { padding: 1.2rem 0; border-right: 0; border-top: 1px solid var(--line); }
  .pilot-pillars h3 { margin-top: .8rem; }
  .oxford-note { width: 100%; }
  .sequence li { grid-template-columns: 2.5rem 1fr; gap: 1rem; }
  .step-mark { display: none; }
  .signature-visual { min-height: 430px; }
  .signature-ui-head, .spectral-meta { padding-inline: .9rem; }
  .spectral-meta { flex-direction: column; }
  .spectral-body { grid-template-columns: 1fr; padding: .9rem; }
  .spectral-chart { width: min(100%, 340px); margin-inline: auto; }
  .spectral-foot { flex-wrap: wrap; padding-inline: .9rem; }
  .audiences > div { grid-template-columns: 1fr; gap: .5rem; }
  .contact { min-height: 650px; }
  .contact-bottom { flex-direction: column; align-items: flex-start; gap: 2.5rem; }
  footer { grid-template-columns: 1fr 1fr; }
  footer p:last-child { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .spectral-current { animation: none; stroke-dashoffset: 0; }
  .spectral-points circle { animation: none; }
}