:root {
  --ink: #171716;
  --paper: #f3f0e8;
  --paper-deep: #e9e5da;
  --blue: #335cff;
  --blue-deep: #1736bd;
  --acid: #c9ff57;
  --orange: #ff6b35;
  --line: rgba(23, 23, 22, 0.17);
  --muted: #67665f;
  --mono: "DM Mono", monospace;
  --sans: "Manrope", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  padding: .8rem 1rem;
  background: var(--acid);
  transition: top .2s;
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  height: 76px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 clamp(1.25rem, 4vw, 4.5rem);
  border-bottom: 1px solid transparent;
  transition: background .25s, border-color .25s, height .25s;
}
.site-header.scrolled {
  height: 66px;
  background: rgba(243, 240, 232, .92);
  border-color: var(--line);
  backdrop-filter: blur(16px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  width: fit-content;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -.045em;
  text-decoration: none;
  font-size: 1.08rem;
}
.brand > span:last-child > span { color: var(--blue); }
.brand-mark { display: flex; align-items: flex-end; gap: 2px; height: 20px; }
.brand-mark i { display: block; width: 4px; background: var(--blue); border-radius: 4px; }
.brand-mark i:nth-child(1) { height: 10px; }
.brand-mark i:nth-child(2) { height: 18px; }
.brand-mark i:nth-child(3) { height: 14px; background: var(--orange); }
.site-header nav { display: flex; gap: 2rem; }
.site-header nav a {
  font-size: .76rem;
  font-family: var(--mono);
  text-transform: uppercase;
  text-decoration: none;
  letter-spacing: .04em;
}
.site-header nav a:hover { color: var(--blue); }
.header-cta {
  justify-self: end;
  padding: .72rem 1rem;
  background: var(--ink);
  color: white;
  font-size: .72rem;
  font-family: var(--mono);
  text-transform: uppercase;
  text-decoration: none;
  transition: transform .2s, background .2s;
}
.header-cta:hover { transform: translateY(-2px); background: var(--blue); }

.hero {
  position: relative;
  min-height: 100svh;
  padding: clamp(8rem, 15vh, 11rem) clamp(1.25rem, 6vw, 7rem) 2rem;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  grid-template-rows: 1fr auto;
  gap: 3rem;
  align-items: center;
}
.hero-grid, .product-grid {
  position: absolute;
  inset: 0;
  opacity: .35;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, black, transparent 86%);
}
.hero-glow { position: absolute; border-radius: 50%; filter: blur(2px); opacity: .6; }
.glow-one {
  width: 34rem; height: 34rem; right: -10rem; top: -15rem;
  background: radial-gradient(circle, rgba(51,92,255,.24), transparent 68%);
}
.glow-two {
  width: 28rem; height: 28rem; left: 30%; bottom: -19rem;
  background: radial-gradient(circle, rgba(255,107,53,.16), transparent 70%);
}
.hero-copy { position: relative; z-index: 2; max-width: 760px; }
.eyebrow, .section-index, .product-status, .product-kicker {
  font-family: var(--mono);
  font-size: .69rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.eyebrow { display: flex; align-items: center; gap: .7rem; margin: 0 0 2.3rem; }
.eyebrow span, .product-status span { width: 7px; height: 7px; background: var(--orange); border-radius: 50%; }
.hero h1 {
  margin: 0;
  font-size: clamp(4.5rem, 9.8vw, 10.5rem);
  line-height: .78;
  letter-spacing: -.09em;
  font-weight: 600;
}
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-intro {
  max-width: 620px;
  margin: clamp(2.4rem, 5vw, 4rem) 0 0;
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  line-height: 1.65;
  color: #4e4d48;
}
.hero-actions { display: flex; align-items: center; gap: 1.8rem; margin-top: 2.1rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.6rem;
  min-width: 220px;
  padding: 1rem 1.15rem;
  font-family: var(--mono);
  font-size: .72rem;
  text-transform: uppercase;
  text-decoration: none;
  transition: transform .2s, box-shadow .2s;
}
.button:hover { transform: translateY(-3px); box-shadow: 0 9px 24px rgba(23,23,22,.13); }
.button-primary { color: white; background: var(--blue); }
.text-link { font-family: var(--mono); font-size: .72rem; text-transform: uppercase; text-underline-offset: 4px; }

.learning-system {
  position: relative;
  z-index: 2;
  justify-self: center;
  width: min(40vw, 550px);
  aspect-ratio: 1;
}
.orbit {
  position: absolute;
  border: 1px solid rgba(23,23,22,.24);
  border-radius: 50%;
  inset: 10%;
}
.orbit-two { inset: 24%; border-style: dashed; animation: spin 24s linear infinite; }
.system-core {
  position: absolute;
  inset: 35%;
  border-radius: 50%;
  background: var(--ink);
  color: white;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  box-shadow: 0 0 0 12px rgba(51,92,255,.12);
}
.system-core strong { margin: .5rem 0; font-size: clamp(1rem, 2vw, 1.5rem); color: var(--acid); }
.system-core small, .core-label { font-family: var(--mono); font-size: .52rem; text-transform: uppercase; }
.system-core small { opacity: .55; }
.orbit-node {
  position: absolute;
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: .75rem .9rem;
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 5px 5px 0 var(--ink);
  font-family: var(--mono);
  font-size: .62rem;
  text-transform: uppercase;
}
.orbit-node span { color: var(--blue); }
.node-one { left: 2%; top: 25%; }
.node-two { right: 0; top: 34%; }
.node-three { bottom: 8%; left: 39%; }
.hero-foot {
  z-index: 2;
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
  font-family: var(--mono);
  font-size: .59rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
}
.hero-foot-line { height: 1px; background: var(--line); }

.section-shell { padding: clamp(5rem, 10vw, 10rem) clamp(1.25rem, 6vw, 7rem); }
.section-index { margin: 0 0 3rem; color: var(--blue-deep); }
.manifesto { background: var(--ink); color: white; }
.manifesto .section-index { color: var(--acid); }
.manifesto-layout { display: grid; grid-template-columns: 1.35fr .65fr; gap: 8vw; }
.manifesto h2, .section-heading h2, .closing h2 {
  margin: 0;
  font-size: clamp(2.8rem, 6vw, 6.8rem);
  line-height: .96;
  letter-spacing: -.065em;
  font-weight: 500;
}
.manifesto-copy { align-self: end; }
.manifesto-copy p { margin: 0 0 1.6rem; color: #b9b8b2; font-size: 1.08rem; line-height: 1.7; }
.manifesto-copy strong { color: white; font-weight: 500; }

.approach { background: var(--paper-deep); }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 2rem; margin-bottom: 4rem; }
.section-heading .section-index { margin-bottom: 1.3rem; }
.section-heading > p { max-width: 310px; margin: 0; color: var(--muted); line-height: 1.6; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ink); }
.principle {
  min-height: 430px;
  position: relative;
  padding: 1.5rem 1.8rem;
  border-right: 1px solid var(--ink);
  overflow: hidden;
}
.principle:first-child { border-left: 1px solid var(--ink); }
.principle-top { display: flex; justify-content: space-between; font-family: var(--mono); font-size: .65rem; }
.principle-top i { font-style: normal; font-size: 1.2rem; }
.principle h3 { margin: 6rem 0 1.1rem; font-size: clamp(1.8rem, 3vw, 3rem); letter-spacing: -.055em; }
.principle p { margin: 0; max-width: 330px; color: var(--muted); line-height: 1.65; }
.signal { position: absolute; inset: auto 1.8rem 1.8rem; height: 80px; display: flex; align-items: end; gap: 7px; }
.signal b { display: block; background: var(--blue); }
.signal-clear b { width: 25%; }
.signal-clear b:nth-child(1) { height: 24%; opacity: .3; }
.signal-clear b:nth-child(2) { height: 43%; opacity: .5; }
.signal-clear b:nth-child(3) { height: 66%; opacity: .7; }
.signal-clear b:nth-child(4) { height: 100%; }
.signal-active { align-items: center; justify-content: center; }
.signal-active b { width: 42px; height: 42px; border-radius: 50%; }
.signal-active b:nth-child(1) { opacity: .25; }
.signal-active b:nth-child(2) { width: 62px; height: 62px; background: var(--orange); }
.signal-active b:nth-child(3) { opacity: .55; }
.signal-stick b { flex: 1; height: 7px; }
.signal-stick b:nth-child(2) { transform: translateY(-14px); }
.signal-stick b:nth-child(3) { transform: translateY(-28px); background: var(--orange); }
.signal-stick b:nth-child(4) { transform: translateY(-14px); }

.products { background: var(--paper); }
.product-card {
  min-height: 610px;
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  background: var(--blue);
  color: white;
  text-decoration: none;
  overflow: hidden;
}
.product-copy { padding: clamp(2rem, 4vw, 4rem); display: flex; flex-direction: column; justify-content: space-between; }
.product-status { display: flex; align-items: center; gap: .7rem; margin: 0; }
.product-status span { background: var(--acid); }
.product-kicker { opacity: .65; }
.product-copy h3 { margin: .5rem 0 1rem; font-size: clamp(4rem, 9vw, 9rem); line-height: .9; letter-spacing: -.085em; }
.product-copy h3 span { color: var(--acid); }
.product-description { max-width: 390px; margin: 0; font-size: 1rem; line-height: 1.7; color: #dbe1ff; }
.product-link { font-family: var(--mono); font-size: .7rem; text-transform: uppercase; }
.product-link b { display: inline-block; margin-left: .45rem; transition: transform .2s; }
.product-card:hover .product-link b { transform: translate(4px, -4px); }
.product-visual { position: relative; background: var(--acid); min-height: 610px; }
.product-grid { opacity: .23; mask-image: none; }
.lesson-stack { position: absolute; inset: 12% 12% 8%; perspective: 1000px; }
.lesson-card {
  position: absolute;
  width: 62%;
  height: 60%;
  left: 18%;
  top: 19%;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  color: var(--ink);
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: 12px 12px 0 var(--ink);
  transition: transform .4s ease;
}
.lesson-card span { font-family: var(--mono); font-size: .66rem; }
.lesson-card strong { margin: auto 0 1rem; font-size: clamp(2rem, 5vw, 4.4rem); letter-spacing: -.07em; }
.lesson-card small { margin-top: 1.3rem; color: var(--muted); }
.lesson-card-back { transform: translate(20%, -17%) rotate(8deg); background: var(--orange); }
.lesson-card-mid { transform: translate(-18%, -7%) rotate(-7deg); background: white; }
.lesson-card-front { transform: rotate(1deg); }
.product-card:hover .lesson-card-back { transform: translate(28%, -22%) rotate(12deg); }
.product-card:hover .lesson-card-mid { transform: translate(-25%, -10%) rotate(-10deg); }
.product-card:hover .lesson-card-front { transform: translateY(-5px) rotate(0); }
.lesson-progress { height: 7px; background: #d5d1c7; }
.lesson-progress i { display: block; width: 68%; height: 100%; background: var(--blue); }

.closing { position: relative; background: var(--orange); overflow: hidden; }
.closing .section-index { color: var(--ink); }
.closing-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.3fr .7fr; gap: 7vw; align-items: end; }
.closing-inner > div { max-width: 420px; }
.closing-inner p { font-size: 1.15rem; line-height: 1.65; margin: 0 0 2rem; }
.button-light { background: var(--paper); }
.closing-orbit { position: absolute; width: 48rem; height: 48rem; right: -19rem; bottom: -28rem; border: 1px solid rgba(23,23,22,.3); border-radius: 50%; }
.closing-orbit i { position: absolute; inset: 18%; border: 1px dashed rgba(23,23,22,.3); border-radius: 50%; }
.closing-orbit i:nth-child(2) { inset: 36%; background: var(--acid); border-style: solid; }
.closing-orbit i:nth-child(3) { inset: 47%; background: var(--ink); }

footer {
  min-height: 160px;
  padding: 2.5rem clamp(1.25rem, 6vw, 7rem);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: end;
  border-top: 1px solid var(--line);
}
footer p, .footer-meta { font-size: .72rem; font-family: var(--mono); }
footer p { text-align: center; color: var(--muted); }
.footer-meta { display: flex; justify-content: flex-end; gap: 1.6rem; }
.footer-meta a { text-underline-offset: 3px; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 8.5rem; }
  .hero h1 { font-size: clamp(4.5rem, 17vw, 8rem); }
  .learning-system { width: min(86vw, 520px); margin-top: 1rem; }
  .manifesto-layout, .closing-inner { grid-template-columns: 1fr; }
  .manifesto-copy { max-width: 580px; }
  .principles { grid-template-columns: 1fr; }
  .principle { min-height: 360px; border-left: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
  .principle h3 { margin-top: 3.5rem; }
  .product-card { grid-template-columns: 1fr; }
  .product-visual { min-height: 520px; }
  footer { grid-template-columns: 1fr; gap: 1rem; align-items: start; }
  footer p { text-align: left; }
  .footer-meta { justify-content: space-between; }
}

@media (max-width: 560px) {
  .site-header { padding-inline: 1rem; }
  .header-cta { padding: .7rem .8rem; font-size: .62rem; }
  .hero { padding-inline: 1rem; }
  .hero h1 { font-size: 19vw; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .learning-system { margin-block: 2rem; }
  .orbit-node { font-size: .5rem; padding: .58rem .65rem; }
  .node-three { left: 30%; }
  .hero-foot { grid-template-columns: 1fr; gap: .6rem; }
  .hero-foot-line { display: none; }
  .section-shell { padding-inline: 1rem; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .product-card, .product-visual { min-height: 500px; }
  .lesson-card { width: 75%; left: 12%; padding: 1.4rem; }
  .closing h2 { font-size: 15vw; }
  footer { padding-inline: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}