/* RADIX — AI operating partner
   THESIS: A live operating knot, not a dashboard collage.
   OWN-WORLD: Neue Montreal on charcoal or cream, lime puncture, dotted field, wireframe torus. */

:root {
  --bg: #161616;
  --bg-deep: #0c0c0c;
  --ink: #f4f4f4;
  --muted: #b7b7b7;
  --line: rgba(244, 244, 244, 0.14);
  --lime: #d7efa8;
  --lime-ink: #11140c;
  --chip: #0b0b0b;
  --font: "Neue Montreal", "Schibsted Grotesk", "Helvetica Neue", sans-serif;
  --pad: clamp(1.1rem, 3vw, 2.4rem);
  --max: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --nav: 5.4rem;
}

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

html { scroll-behavior: smooth; }

html, body { min-height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: clamp(1.125rem, 1.15vw + 0.85rem, 1.375rem);
  line-height: 1.45;
  font-weight: 400;
  letter-spacing: -0.018em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.theme-light {
  --bg: #f4f1ec;
  --bg-deep: #ece7df;
  --ink: #141414;
  --muted: #4d4d4d;
  --line: rgba(20, 20, 20, 0.12);
  --chip: #111;
}

body.theme-void {
  --bg: #050505;
  --bg-deep: #000;
  --ink: #f6f6f6;
  --muted: #c2c2c2;
}

img, video {
  display: block;
  max-width: 100%;
  height: auto;
}
img[hidden],
video[hidden] { display: none !important; }

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

button, input, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
}

button { cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 0.8rem 1.1rem;
  background: var(--lime);
  color: var(--lime-ink);
}
.skip:focus { left: 1rem; top: 1rem; }

.back-link {
  position: fixed;
  left: max(0.7rem, env(safe-area-inset-left, 0px));
  right: auto;
  bottom: max(0.55rem, env(safe-area-inset-bottom, 0px));
  z-index: 8;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.28rem 0.55rem;
  border-radius: 0.4rem;
  background: var(--chip);
  color: #f4f4f4;
  opacity: 0.9;
  transition: opacity 0.28s var(--ease);
}
.back-link.is-tucked {
  opacity: 0;
  pointer-events: none;
}
body:has(.dissolve-hero) .back-link {
  opacity: 0;
  pointer-events: none;
}
body:has(.dissolve-hero) .back-link:not(.is-tucked) {
  opacity: 0.9;
  pointer-events: auto;
}

/* —— chrome —— */
.top {
  position: fixed;
  inset: 0.85rem var(--pad) auto;
  z-index: 80;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.75rem;
  pointer-events: none;
}
.top > * { pointer-events: auto; }

.chip,
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.85rem;
  padding: 0 0.95rem;
  border-radius: 0.7rem;
  background: var(--chip);
  color: #f4f4f4;
  font-size: 1.125rem;
  letter-spacing: 0.01em;
}

.chip--ghost {
  background: rgba(20, 20, 20, 0.55);
  backdrop-filter: blur(10px);
}

.theme-light .chip--ghost {
  background: rgba(20, 20, 20, 0.72);
}

.chip--cta { padding-right: 0.45rem; }

.go {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background: var(--lime);
  color: var(--lime-ink);
  display: grid;
  place-items: center;
}
.go svg { width: 0.85rem; height: 0.85rem; }

.brand {
  justify-self: center;
  min-width: min(22rem, 72vw);
  justify-content: space-between;
  padding-right: 0.7rem;
}
.brand-mark {
  font-weight: 400;
  letter-spacing: -0.03em;
}
.theme-void .brand-mark {
  letter-spacing: 0.22em;
  font-size: 1.125rem;
}
.theme-void .media-copy .display { color: #f6f6f6; }
.theme-void .media-copy .lede { color: #dedede; }
.brand-bars {
  width: 1.35rem;
  height: 0.7rem;
  display: grid;
  align-content: space-between;
}
.brand-bars i {
  display: block;
  height: 1.5px;
  background: #f4f4f4;
}
.brand--invert {
  background: #f4f4f4;
  color: #111;
}
.brand--invert .brand-bars i { background: #111; }

.menu {
  position: fixed;
  inset: 0;
  z-index: 70;
  display: grid;
  place-items: center;
  padding: 6rem var(--pad) 3rem;
  background: rgba(12, 12, 12, 0.92);
  color: #f4f4f4;
  backdrop-filter: blur(18px);
}
.theme-light .menu { background: rgba(244, 241, 236, 0.94); color: #141414; }
.menu[hidden] { display: none; }
.menu nav {
  display: grid;
  gap: 0.35rem;
  text-align: center;
}
.menu a {
  font-size: clamp(2rem, 6vw, 4.2rem);
  letter-spacing: -0.045em;
  line-height: 1.05;
}
.menu a:hover { color: var(--lime); }
.menu a:hover::after {
  content: "";
}
.menu a.is-here { color: var(--lime); }
.dots-bg {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image: radial-gradient(rgba(244, 244, 244, 0.16) 1px, transparent 1.2px);
  background-size: 5px 5px;
  mask-image: radial-gradient(ellipse at 50% 40%, #000 0, transparent 72%);
  opacity: 0.55;
}
.theme-light .dots-bg {
  background-image: radial-gradient(rgba(20, 20, 20, 0.12) 1px, transparent 1.2px);
}

main { position: relative; z-index: 1; }

/* —— type —— */
.kicker {
  margin: 0 0 1rem;
  font-size: 1.125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.display {
  margin: 0;
  font-size: clamp(2.6rem, 7.4vw, 5.1rem);
  line-height: 0.95;
  letter-spacing: -0.045em;
  font-weight: 400;
}
.lede {
  margin: 1.1rem 0 0;
  color: var(--muted);
  font-size: clamp(1.2rem, 1.7vw, 1.55rem);
  max-width: 38rem;
  line-height: 1.35;
}

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

.section {
  padding: clamp(4.5rem, 10vh, 7.5rem) 0;
}

.section-lg { padding: clamp(5.5rem, 14vh, 9rem) 0; }

/* —— hero —— */
.hero {
  height: 100svh;
  min-height: 100svh;
  max-height: 100svh;
  overflow: hidden;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  grid-template-areas: "copy" "stage";
  justify-items: center;
  text-align: center;
  padding: 18vh var(--pad) 5.2rem;
  position: relative;
}
.hero-copy {
  grid-area: copy;
  position: relative;
  z-index: 2;
  padding-bottom: 2.6rem;
  color: var(--ink);
}
.hero .display { max-width: none; margin-inline: auto; }
.hero .lede { margin-inline: auto; }
@media (min-width: 760px) {
  .hero .display { white-space: nowrap; }
}
.hero-stage {
  grid-area: stage;
  position: relative;
  inset: auto;
  z-index: 0;
  width: 100%;
  min-height: 0;
  height: 100%;
  overflow: hidden;
  align-self: stretch;
  pointer-events: none;
}
.hero-stage canvas,
.hero-stage img {
  width: 100%;
  height: 100%;
  max-height: 100%;
  object-fit: contain;
}
.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 6.5vh;
  z-index: 2;
  transform: translateX(-50%);
  display: grid;
  justify-items: center;
  gap: 0.25rem;
  color: var(--ink);
  font-size: 1.125rem;
  padding: 0.45rem 0.85rem 0.55rem;
  border-radius: 0.65rem;
  background: rgba(12, 12, 12, 0.78);
}
.scroll-cue i {
  width: 0.7rem;
  height: 0.7rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  animation: bob 1.6s var(--ease) infinite;
}
@keyframes bob {
  50% { transform: rotate(45deg) translate(3px, 3px); }
}

.split {
  display: grid;
  grid-template-columns: 1fr minmax(16rem, 0.9fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
}
.split--reverse { grid-template-columns: minmax(16rem, 0.9fr) 1fr; }
.split-media {
  position: relative;
  min-height: min(62vh, 34rem);
}
.split-media canvas,
.split-media video,
.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}
.split-media.contain {
  min-height: min(48vh, 26rem);
  background: transparent;
}
.split-media.contain img,
.split-media.contain canvas,
.split-media.contain video {
  object-fit: contain;
  background: transparent;
  mix-blend-mode: screen;
  filter: contrast(1.28) brightness(1.06);
  -webkit-mask-image: radial-gradient(ellipse 68% 68% at 50% 48%, #000 40%, transparent 72%);
  mask-image: radial-gradient(ellipse 68% 68% at 50% 48%, #000 40%, transparent 72%);
}

.layer-list {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}
.layer-list li {
  margin: 0;
  max-width: 38rem;
  color: var(--muted);
}
.layer-list strong {
  display: block;
  color: var(--ink);
  font-weight: 500;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.2rem;
}

.quote {
  max-width: 18ch;
  margin: 0 auto;
  text-align: center;
  font-size: clamp(2.1rem, 5.4vw, 3.8rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}
.quote-meta {
  margin: 1.4rem 0 0;
  text-align: center;
  color: var(--muted);
}
.quote-meta strong { display: block; color: var(--ink); font-weight: 500; }

.media-band {
  position: relative;
  min-height: 72vh;
  display: grid;
  align-items: end;
  overflow: hidden;
}
.media-band video,
.media-band img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5, 5, 5, 0.78), transparent 55%);
}
.media-copy {
  position: relative;
  z-index: 1;
  padding: clamp(2rem, 6vw, 4rem) var(--pad) 4rem;
  max-width: 46rem;
}
.media-copy .lede { color: #d8d8d8; }

.btn-row { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.4rem; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.8rem;
  padding: 0 1.05rem;
  border-radius: 0.65rem;
  border: 1px solid var(--line);
}
.btn--solid {
  background: var(--ink);
  color: var(--bg);
  border-color: transparent;
}
.theme-light .btn--solid { color: #f4f1ec; }

.stack { display: grid; gap: 2.4rem; }
.stack h2,
.stack h3 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  letter-spacing: -0.035em;
  font-weight: 400;
}
.stack p { margin: 0; color: var(--muted); max-width: 42rem; }

.functions {
  display: grid;
  gap: 0;
}
.fn {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 1.5rem;
  padding: 2.4rem 0;
  border-top: 1px solid var(--line);
}
.fn h3 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  letter-spacing: -0.04em;
  font-weight: 400;
}
.fn p { margin: 0 0 1rem; color: var(--muted); }
.fn .out { color: var(--ink); }

.dissolve-hero {
  position: relative;
  height: 100svh;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
}
.pixels {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: pixelated;
  pointer-events: none;
}
.dissolve-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 46%;
  background: linear-gradient(to top, var(--bg) 12%, transparent);
  pointer-events: none;
}
.dissolve-copy {
  position: relative;
  z-index: 1;
  padding: calc(var(--nav) + 4.5rem) 0 4.2rem;
}

.fronts { display: grid; gap: 0; }
.front {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.1rem 1.6rem;
  padding: 1.8rem 0;
  border-top: 1px solid var(--line);
}
.front b {
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--muted);
}
.front h3 {
  margin: 0;
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  letter-spacing: -0.03em;
  font-weight: 400;
}
.front p { margin: 0.35rem 0 0; color: var(--muted); grid-column: 2; }

.traps-block .display {
  position: relative;
  z-index: 2;
  margin: 0 0 0.75rem;
  padding: 0;
  background: var(--bg);
}
.traps {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  height: 22rem;
  margin-top: 0;
}
.traps-track {
  position: relative;
  z-index: 0;
  display: flex;
  flex-direction: column;
  animation: rise 28s linear infinite;
}
.traps-fade {
  position: absolute;
  left: 0;
  right: 0;
  z-index: 3;
  pointer-events: none;
}
.traps-fade--top {
  top: 0;
  height: 5.4rem;
  background: linear-gradient(to bottom, var(--bg) 0 4.5rem, transparent);
}
.traps-fade--bot {
  bottom: 0;
  height: 3rem;
  background: linear-gradient(to top, var(--bg), transparent);
}
.traps-row { flex-shrink: 0; padding-bottom: 0.35rem; }
.trap {
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
}
.trap strong {
  display: block;
  font-size: 1.55rem;
  letter-spacing: -0.03em;
  font-weight: 400;
}
.trap span { color: var(--muted); }
@keyframes rise {
  to { transform: translateY(-50%); }
}

.cta-band {
  text-align: center;
  padding: clamp(5rem, 14vh, 8rem) var(--pad) 5.6rem;
}
.cta-band .display { margin-inline: auto; max-width: 16ch; }

.page-hero {
  padding: calc(var(--nav) + 6.2rem) 0 3rem;
}

.photo {
  width: 100%;
  max-height: 72vh;
  object-fit: cover;
  border-radius: 0.2rem;
}

.founder {
  display: grid;
  grid-template-columns: minmax(12rem, 18rem) 1fr;
  gap: 2rem;
  align-items: center;
}
.founder img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
}

.articles { display: grid; gap: 0; }
.article {
  display: grid;
  grid-template-columns: minmax(8rem, 12rem) 1fr auto;
  gap: 1rem;
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}
.article small { color: var(--muted); }
.article h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  letter-spacing: -0.03em;
  font-weight: 400;
}

.form {
  display: grid;
  gap: 0.85rem;
  max-width: 36rem;
}
.form[hidden],
.form-ok[hidden] { display: none; }
.form label {
  display: grid;
  gap: 0.4rem;
}
.form input,
.form textarea,
.form select {
  width: 100%;
  padding: 0.85rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  background: transparent;
}
.form textarea { min-height: 8.5rem; resize: vertical; }
.form button {
  justify-self: start;
  min-height: 3rem;
  padding: 0 1.3rem;
  border-radius: 0.65rem;
  background: var(--ink);
  color: var(--bg);
}
.form-ok {
  color: var(--ink);
  font-size: clamp(1.45rem, 2.6vw, 2rem);
  line-height: 1.3;
  max-width: 22rem;
  margin: 0;
}

.faq details {
  padding: 1.3rem 0;
  border-top: 1px solid var(--line);
}
.faq summary {
  cursor: pointer;
  font-size: 1.45rem;
  letter-spacing: -0.03em;
}
.faq p { color: var(--muted); margin: 0.7rem 0 0; max-width: 44rem; }

.legal p { max-width: 46rem; color: var(--muted); }

.site-foot {
  padding: 3rem var(--pad) 4.6rem;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 1.4rem;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1.5rem;
}
.foot-grid a { display: block; padding: 0.18rem 0; color: var(--muted); }
.foot-grid a:hover { color: var(--ink); }
.foot-copy { color: var(--muted); font-size: 1.05rem; }

.reveal {
  opacity: 0;
  transform: translateY(18px);
  animation: in 0.8s var(--ease) forwards;
}
.reveal:nth-child(2) { animation-delay: 0.08s; }
.reveal:nth-child(3) { animation-delay: 0.16s; }
@keyframes in {
  to { opacity: 1; transform: none; }
}

@media (max-width: 860px) {
  .split,
  .split--reverse,
  .fn,
  .founder,
  .article,
  .foot-grid {
    grid-template-columns: 1fr;
  }
  .top {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.4rem;
  }
  .top > .chip--ghost { display: none; }
  .brand {
    min-width: 0;
    width: auto;
    justify-self: start;
    padding-inline: 0.7rem;
  }
  .chip {
    min-height: 2.55rem;
    padding-inline: 0.7rem;
  }
  .split-media { min-height: 22rem; }
  .hero { padding-top: 14vh; padding-bottom: 4.6rem; }
  .hero-copy { padding-bottom: 2.4rem; }
  .scroll-cue { bottom: 4.4rem; }
  .media-copy {
    padding-bottom: 3.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; animation: none; }
  .traps-track, .scroll-cue i { animation: none; }
}