@font-face { font-family: "Erica One"; src: url("assets/fonts/EricaOne-Regular.ttf") format("truetype"); font-display: swap; }
@font-face { font-family: "Jura"; src: url("assets/fonts/Jura-Medium.ttf") format("truetype"); font-display: swap; }
@font-face { font-family: "Geist Mono"; src: url("assets/fonts/GeistMono-Regular.ttf") format("truetype"); font-display: swap; }

:root {
  --deep: #091514;
  --deep-soft: #102421;
  --mint: #bdf7db;
  --aqua: #4dd7c7;
  --violet: #a88cf5;
  --paper: #e7f1e8;
  --ink: #10201d;
  --muted: #678078;
  --line-dark: rgba(189, 247, 219, .21);
  --line-light: rgba(16, 32, 29, .18);
  --display: "Erica One", sans-serif;
  --body: "Jura", sans-serif;
  --meta: "Geist Mono", monospace;
  --ease: cubic-bezier(.16, 1, .3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: clip; color: var(--mint); background: var(--deep); font-family: var(--body); }
button, input, select, textarea { font: inherit; }
a { color: inherit; }
svg, canvas { display: block; }
::selection { color: var(--deep); background: var(--violet); }
:focus-visible { outline: 3px solid var(--violet); outline-offset: 4px; }
.skip-link { position: fixed; z-index: 1000; inset: 12px auto auto 12px; padding: 12px 16px; color: var(--deep); background: var(--mint); transform: translateY(-160%); }
.skip-link:focus { transform: none; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 90; min-height: 74px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 24px; padding: 14px clamp(18px, 3vw, 48px); border-bottom: 1px solid var(--line-dark); background: rgba(9, 21, 20, .78); backdrop-filter: blur(16px); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--meta); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.brand > span { display: grid; place-items: center; width: 36px; height: 36px; color: var(--deep); background: var(--mint); border-radius: 50%; font-family: var(--display); font-size: 20px; }
.site-header nav { display: flex; gap: clamp(20px, 3.4vw, 52px); font-family: var(--meta); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
.site-header nav a { position: relative; text-decoration: none; }
.site-header nav a::before { content: ""; position: absolute; left: -12px; top: 50%; width: 5px; height: 5px; border-radius: 50%; background: var(--aqua); opacity: 0; transform: translateY(-50%) scale(0); transition: .35s var(--ease); }
.site-header nav a:hover::before, .site-header nav a:focus-visible::before { opacity: 1; transform: translateY(-50%) scale(1); }
.header-cta { justify-self: end; min-height: 44px; padding: 10px 16px; color: var(--deep); background: var(--mint); border: 0; border-radius: 999px; cursor: pointer; font-family: var(--meta); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; transition: background .3s, transform .4s var(--ease); }
.header-cta:hover { background: var(--violet); transform: translateY(-2px); }

.hero { position: relative; min-height: 100svh; overflow: hidden; }
#helix-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-grid { position: absolute; inset: 0; opacity: .16; background-image: linear-gradient(var(--line-dark) 1px, transparent 1px), linear-gradient(90deg, var(--line-dark) 1px, transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(to bottom, #000, transparent 86%); }
.hero-copy { position: relative; z-index: 3; width: min(100%, 1500px); min-height: 100svh; display: flex; flex-direction: column; justify-content: center; padding: 120px clamp(18px, 4vw, 64px) 100px; }
.eyebrow, .section-label { margin: 0 0 25px; font-family: var(--meta); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; }
.hero h1 { max-width: 1050px; margin: 0; font-family: var(--display); font-size: clamp(66px, 10.5vw, 178px); font-weight: 400; line-height: .78; letter-spacing: -.045em; }
.hero h1 span, .hero h1 em { display: block; }
.hero h1 em { margin-left: clamp(24px, 8vw, 130px); color: var(--violet); font-family: var(--body); font-size: .55em; font-style: normal; letter-spacing: -.07em; }
.hero-lede { max-width: 43ch; margin: 38px 0 0 clamp(24px, 8vw, 130px); color: #9bc7b7; font-size: clamp(16px, 1.5vw, 22px); line-height: 1.5; }
.hero-actions { display: flex; align-items: center; gap: 24px; margin: 30px 0 0 clamp(24px, 8vw, 130px); }
.button, .text-button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 12px 19px; border: 0; cursor: pointer; font-family: var(--meta); font-size: 10px; letter-spacing: .07em; text-decoration: none; text-transform: uppercase; }
.button-primary { color: var(--deep); background: var(--mint); border-radius: 999px; transition: background .3s, transform .4s var(--ease); }
.button-primary:hover { background: var(--violet); transform: translateY(-3px); }
.text-button { gap: 14px; padding-inline: 0; color: var(--mint); background: transparent; border-bottom: 1px solid var(--line-dark); }
.hero-status { position: absolute; z-index: 4; right: clamp(18px, 4vw, 64px); bottom: 48px; display: grid; grid-template-columns: repeat(3, auto); gap: 34px; }
.hero-status p { margin: 0; padding-left: 15px; border-left: 1px solid var(--line-dark); }
.hero-status span { display: block; color: #78998e; font-family: var(--meta); font-size: 8px; letter-spacing: .12em; text-transform: uppercase; }
.hero-status strong { display: block; margin-top: 7px; font: 28px/1 var(--meta); }
.hero-scroll { position: absolute; z-index: 4; left: clamp(18px, 4vw, 64px); bottom: 48px; display: flex; align-items: center; gap: 12px; color: #78998e; font-family: var(--meta); font-size: 8px; letter-spacing: .12em; text-transform: uppercase; }
.hero-scroll i { width: 52px; height: 1px; background: var(--line-dark); overflow: hidden; }
.hero-scroll i::after { content: ""; display: block; width: 50%; height: 100%; background: var(--aqua); animation: scan 1.8s ease-in-out infinite alternate; }
@keyframes scan { to { transform: translateX(100%); } }

.signal-strip { overflow: hidden; color: var(--deep); background: var(--aqua); }
.signal-strip > div { min-width: max-content; display: flex; justify-content: space-around; gap: 42px; padding: 15px clamp(18px, 4vw, 64px); font-family: var(--meta); font-size: 10px; letter-spacing: .09em; text-transform: uppercase; }
.signal-strip b { display: grid; place-items: center; width: 24px; height: 24px; border: 1px solid var(--deep); border-radius: 50%; font-weight: 400; }

.section-pad { padding: clamp(90px, 13vw, 190px) clamp(18px, 4vw, 64px); }
.manifesto { color: var(--ink); background: var(--paper); }
.manifesto h2, .platform h2, .evidence h2, .explorer h2, .principles h2, .contact h2 { margin: 0; font-family: var(--display); font-size: clamp(52px, 8.2vw, 132px); font-weight: 400; line-height: .84; letter-spacing: -.045em; }
.manifesto h2 span { color: var(--muted); font-family: var(--body); font-size: .58em; letter-spacing: -.06em; }
.manifesto > p:last-child { max-width: 55ch; margin: 55px 0 0 auto; font-size: clamp(17px, 1.6vw, 24px); line-height: 1.55; }

.platform { color: var(--mint); background: var(--deep); }
.platform-intro { display: grid; grid-template-columns: .35fr 1fr; gap: 48px; border-bottom: 1px solid var(--line-dark); }
.platform-stage { height: 360vh; }
.platform-pin { position: sticky; top: 0; min-height: 100svh; display: grid; grid-template-columns: 1fr 1fr; padding-top: 74px; }
.proof-visual { position: relative; display: grid; place-items: center; overflow: hidden; background: var(--deep-soft); }
.proof-visual svg { position: relative; z-index: 2; width: min(72%, 620px); overflow: visible; }
.proof-rings { position: absolute; inset: 10%; }
.proof-rings i { position: absolute; inset: 0; border: 1px solid var(--line-dark); border-radius: 50%; }
.proof-rings i:nth-child(2) { inset: 12%; border-style: dashed; transform: rotate(30deg); }
.proof-rings i:nth-child(3) { inset: 29%; border-color: rgba(168, 140, 245, .4); }
.proof-readout { position: absolute; left: 30px; bottom: 26px; color: #779b90; font-family: var(--meta); font-size: 9px; letter-spacing: .13em; }
.proof-steps { padding: 9vh 5vw; }
.proof-step { min-height: calc((100svh - 74px) / 3); display: grid; align-content: center; padding: 34px 0; color: #6f8e84; border-bottom: 1px solid var(--line-dark); transition: color .5s var(--ease), transform .6s var(--ease); }
.proof-step > span, .evidence-card > span { font-family: var(--meta); font-size: 9px; letter-spacing: .12em; text-transform: uppercase; }
.proof-step h3 { margin: 14px 0 12px; font-size: clamp(24px, 2.5vw, 40px); font-weight: 500; letter-spacing: -.04em; }
.proof-step p { max-width: 46ch; margin: 0; line-height: 1.55; }
.proof-step ul { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 0; padding: 0; list-style: none; }
.proof-step li { padding: 7px 10px; border: 1px solid currentColor; border-radius: 999px; font-family: var(--meta); font-size: 8px; letter-spacing: .05em; text-transform: uppercase; }
.proof-step.is-active { color: var(--mint); transform: translateX(16px); }
.proof-step.is-active > span { color: var(--aqua); }

.evidence { color: var(--ink); background: var(--mint); }
.evidence-heading { display: grid; grid-template-columns: .35fr 1.1fr .55fr; align-items: end; gap: 48px; }
.evidence-heading p:last-child { max-width: 36ch; line-height: 1.55; }
.evidence-grid { display: grid; grid-template-columns: 1.4fr .6fr; gap: 12px; margin-top: clamp(70px, 10vw, 140px); }
.evidence-card { min-height: 340px; display: flex; flex-direction: column; justify-content: flex-end; padding: clamp(24px, 3vw, 44px); color: var(--mint); background: var(--deep); }
.evidence-card-wide { grid-row: span 2; min-height: 692px; justify-content: space-between; }
.evidence-card strong { margin: auto 0 16px; font: clamp(70px, 9vw, 145px)/.8 var(--display); }
.evidence-card h3 { max-width: 20ch; margin: 12px 0 8px; font-size: clamp(23px, 2.5vw, 38px); font-weight: 500; line-height: 1; letter-spacing: -.045em; }
.evidence-card p { max-width: 38ch; margin: 0; color: #93b4a9; line-height: 1.5; }
.evidence-violet { color: var(--deep); background: var(--violet); }
.evidence-violet p { color: #32294b; }
.chart { width: 100%; }
.chart svg { width: 100%; overflow: visible; }
.data-note { margin: 18px 0 0; font-family: var(--meta); font-size: 8px; letter-spacing: .08em; text-transform: uppercase; }

.explorer { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(50px, 9vw, 140px); color: var(--mint); background: var(--deep); }
.explorer > div:first-child > p:last-child { max-width: 38ch; margin-top: 28px; color: #78998e; line-height: 1.55; }
.resolution-control { align-self: end; }
.resolution-control label { display: flex; justify-content: space-between; font-family: var(--meta); font-size: 10px; letter-spacing: .09em; text-transform: uppercase; }
.resolution-control input { width: 100%; margin: 22px 0 32px; accent-color: var(--aqua); }
.sample-field { --count: 64; min-height: 430px; display: grid; grid-template-columns: repeat(8, 1fr); gap: 8px; padding: clamp(18px, 3vw, 38px); background: var(--deep-soft); border: 1px solid var(--line-dark); }
.sample-field i { display: block; aspect-ratio: 1; border-radius: 50%; background: var(--aqua); opacity: calc(.24 + var(--signal, .5) * .76); transform: scale(calc(.45 + var(--signal, .5) * .55)); transition: opacity .4s, transform .4s var(--ease), background .4s; }
.sample-field i:nth-child(5n) { background: var(--violet); }
.resolution-control > p { color: #78998e; font-family: var(--meta); font-size: 8px; letter-spacing: .08em; text-transform: uppercase; }

.principles { color: var(--ink); background: var(--paper); }
.principle-list { margin-top: clamp(60px, 9vw, 130px); border-top: 1px solid var(--line-light); }
.principle-list article { display: grid; grid-template-columns: .18fr .55fr 1fr; gap: 30px; padding: 30px 0; border-bottom: 1px solid var(--line-light); }
.principle-list span { font-family: var(--meta); font-size: 10px; }
.principle-list h3 { margin: 0; font-size: clamp(22px, 2.4vw, 36px); font-weight: 500; letter-spacing: -.04em; }
.principle-list p { max-width: 50ch; margin: 0; color: var(--muted); line-height: 1.55; }

.contact { position: relative; min-height: 100svh; display: grid; place-items: center; align-content: center; overflow: hidden; text-align: center; }
#contact-canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .45; }
.contact > *:not(canvas) { position: relative; z-index: 2; }
.contact h2 { max-width: 1100px; }
.contact .button { margin: 40px 0 20px; }
.contact > p:last-child { color: #78998e; }

footer { display: grid; grid-template-columns: 1fr auto 1fr; align-items: end; gap: 30px; padding: 42px clamp(18px, 4vw, 64px); border-top: 1px solid var(--line-dark); color: #78998e; font-size: 12px; line-height: 1.5; }
footer nav { display: flex; gap: 28px; font-family: var(--meta); font-size: 9px; letter-spacing: .08em; text-transform: uppercase; }
footer p { justify-self: end; margin: 0; text-align: right; }

.contact-dialog { width: min(92vw, 680px); max-height: 92svh; padding: 0; color: var(--mint); background: var(--deep-soft); border: 1px solid var(--line-dark); }
.contact-dialog::backdrop { background: rgba(4, 12, 11, .82); backdrop-filter: blur(10px); }
.dialog-close { position: absolute; right: 16px; top: 14px; }
.dialog-close button { width: 44px; height: 44px; color: var(--mint); background: transparent; border: 1px solid var(--line-dark); cursor: pointer; font-size: 26px; }
.contact-form { display: grid; gap: 18px; padding: clamp(34px, 7vw, 72px); }
.contact-form h2 { max-width: 12ch; margin: 0 0 12px; font-size: clamp(36px, 5vw, 62px); line-height: .94; letter-spacing: -.05em; }
.contact-form label { display: grid; gap: 7px; font-family: var(--meta); font-size: 8px; letter-spacing: .1em; text-transform: uppercase; }
.contact-form input, .contact-form select, .contact-form textarea { min-height: 48px; padding: 11px 12px; color: var(--mint); background: transparent; border: 1px solid var(--line-dark); border-radius: 0; }
.contact-form textarea { resize: vertical; }
.contact-form .button { justify-self: start; }
.form-status { margin: 0; color: #78998e; font-size: 12px; }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .hero-status { right: 18px; grid-template-columns: 1fr; gap: 12px; }
  .hero-status p { display: none; }
  .hero-status p:first-child { display: block; }
  .platform-intro, .evidence-heading { grid-template-columns: .28fr 1fr; }
  .evidence-heading > p:last-child { grid-column: 2; }
  .platform-stage { height: auto; }
  .platform-pin { position: relative; min-height: 0; grid-template-columns: 1fr; padding-top: 0; }
  .proof-visual { min-height: 76svh; }
  .proof-steps { padding: 7vw 5vw; }
  .proof-step { min-height: 42svh; }
  .explorer { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .site-header { min-height: 64px; padding-block: 10px; }
  .header-cta { padding-inline: 12px; }
  .hero-copy { padding-top: 100px; }
  .hero h1 { font-size: clamp(62px, 21vw, 98px); }
  .hero h1 em, .hero-lede, .hero-actions { margin-left: 0; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .hero-scroll, .hero-status { bottom: 20px; }
  .signal-strip > div { justify-content: flex-start; }
  .platform-intro, .evidence-heading { grid-template-columns: 1fr; }
  .evidence-heading > p:last-child { grid-column: auto; }
  .proof-visual { min-height: 62svh; }
  .proof-visual svg { width: 88%; }
  .evidence-grid { grid-template-columns: 1fr; }
  .evidence-card-wide { grid-row: auto; min-height: 520px; }
  .sample-field { min-height: 300px; gap: 5px; }
  .principle-list article { grid-template-columns: auto 1fr; }
  .principle-list p { grid-column: 2; }
  footer { grid-template-columns: 1fr; align-items: start; }
  footer nav { flex-wrap: wrap; }
  footer p { justify-self: start; text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .platform-stage { height: auto; }
  .platform-pin { position: relative; min-height: 0; }
}