@font-face {
  font-family: Engine;
  src: local("Arial");
  font-display: swap;
}
:root {
  --bg: #080e15;
  --panel: #0d1620;
  --ink: #eef2f6;
  --muted: #9cabb9;
  --blue: #235a85;
  --accent: #84accb;
  --line: #25313c;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  color-scheme: dark;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 35px;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Engine, Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
a:hover {
  color: var(--accent);
}
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 7px;
}
::selection {
  background: var(--blue);
  color: #fff;
}
.wrap {
  width: min(1280px, calc(100% - 112px));
  margin-inline: auto;
}
.skip {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--ink);
  color: var(--bg);
  padding: 12px;
  z-index: 5;
}
.skip:focus {
  top: 12px;
}
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 106px;
  border-bottom: 1px solid var(--line);
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}
.brand-mark {
  width: 14px;
  height: 18px;
  border: 1px solid var(--accent);
  border-left: 5px solid var(--blue);
  transform: skewY(-20deg);
}
nav {
  display: flex;
  gap: 34px;
  font: 0.8125rem var(--mono);
  letter-spacing: 0.055em;
}
nav a {
  padding: 12px 0;
}
nav span {
  margin-left: 5px;
}
.hero {
  position: relative;
  min-height: 720px;
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(210px, 0.7fr);
  column-gap: 60px;
  align-items: center;
  padding-top: 84px;
  padding-bottom: 114px;
}
.eyebrow {
  font: 0.75rem/1.6 var(--mono);
  letter-spacing: 0.09em;
  color: var(--accent);
  margin: 0 0 30px;
}
.hero .eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
}
.line {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--blue);
}
h1 {
  font-size: clamp(2.5rem, 4.4vw, 4.4rem);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.055em;
  margin: 0 0 30px;
}
h1 span {
  color: var(--accent);
}
.intro {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--muted);
  margin: 0 0 30px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 26px;
  font-size: 0.9375rem;
  border-bottom: 1px solid var(--blue);
  padding: 12px 0;
}
.text-link span {
  font-size: 1.2rem;
  color: var(--accent);
}
.hero-foot {
  position: absolute;
  bottom: 30px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  font: 0.75rem var(--mono);
  letter-spacing: 0.075em;
  color: var(--muted);
}
.hero-foot a {
  display: flex;
  gap: 24px;
}
.hero-system {
  max-width: 310px;
  width: 100%;
  margin-top: 40px;
  position: relative;
}
.system-label {
  font: 0.625rem var(--mono);
  letter-spacing: 0.13em;
  color: var(--muted);
  text-align: center;
}
.wire-input {
  height: 64px;
  display: flex;
  justify-content: space-evenly;
  padding: 0 18px;
}
.wire-input span {
  width: 1px;
  background: var(--line);
  position: relative;
}
.wire-input span:before {
  content: "";
  position: absolute;
  top: 0;
  left: -2px;
  width: 5px;
  height: 5px;
  background: var(--blue);
}
.system-layer {
  border: 1px solid #314150;
  min-height: 61px;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 15px;
  font: 0.8125rem var(--mono);
  position: relative;
  background: var(--panel);
}
.system-layer:after {
  content: "";
  position: absolute;
  bottom: -16px;
  left: 50%;
  height: 15px;
  width: 1px;
  background: #405c72;
}
.system-layer span {
  color: var(--accent);
  font-size: 0.6875rem;
}
.system-layer i {
  width: 5px;
  height: 5px;
  border: 1px solid var(--accent);
  margin-left: auto;
}
.system-layer.accent {
  border-color: var(--blue);
  background: #10263a;
}
.system-layer.accent i {
  background: var(--accent);
  animation: pulse 5s ease-in-out infinite;
}
.output-wire {
  height: 29px;
  width: 1px;
  background: var(--blue);
  margin: auto;
}
.bottom-label {
  padding-top: 15px;
}
.section {
  border-top: 1px solid var(--line);
  padding-top: 86px;
  padding-bottom: 86px;
}
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 50px;
  margin-bottom: 56px;
}
.section-heading .eyebrow {
  min-width: 240px;
  margin-top: 8px;
}
h2 {
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.04em;
  margin: 0;
}
.section-heading h2 {
  width: 62%;
}
.architecture-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 80px;
}
.quiet-label {
  font: 0.75rem/1.6 var(--mono);
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 30px;
}
dl {
  margin: 0;
}
dl > div {
  margin-bottom: 28px;
}
dt {
  font: 0.8125rem var(--mono);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
dd {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
  max-width: 280px;
}
.pipeline {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
}
.pipeline li {
  display: grid;
  grid-template-columns: 38px 1fr auto;
  gap: 16px;
  align-items: center;
  font: 0.8125rem/1.5 var(--mono);
  min-height: 59px;
  padding: 17px 20px;
  border: 1px solid var(--line);
  margin-bottom: 12px;
  position: relative;
  background: var(--panel);
}
.pipeline li:not(:last-child):after {
  content: "";
  height: 12px;
  width: 1px;
  background: var(--blue);
  position: absolute;
  bottom: -13px;
  left: 38px;
}
.step-id {
  font-size: 0.6875rem;
  color: var(--accent);
}
.step-end {
  font-size: 0.625rem;
  color: var(--muted);
}
.pipeline .boundary {
  background: transparent;
  border-style: dashed;
}
.pipeline .reasoning {
  background: #112a3f;
  border-color: var(--blue);
}
.compact {
  margin-bottom: 38px;
}
.compact h2 {
  font-size: 2rem;
}
.capabilities {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.seo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.seo-grid article {
  background: var(--bg);
  padding: 34px;
}
.seo-grid h3 {
  margin: 0 0 18px;
  font-size: 1.15rem;
  font-weight: 500;
}
.seo-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}
@media (max-width: 820px) {
  .seo-grid { grid-template-columns: 1fr; }
}
.capabilities article {
  padding: 32px 30px 34px 0;
  border-top: 1px solid var(--line);
  min-height: 188px;
}
.capabilities article:not(:nth-child(3n + 1)) {
  border-left: 1px solid var(--line);
  padding-left: 30px;
}
.cap-number {
  font: 0.75rem var(--mono);
  color: var(--accent);
}
h3 {
  font-weight: 400;
}
.capabilities h3 {
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  margin: 24px 0 12px;
}
.capabilities p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--muted);
  max-width: 300px;
  margin: 0;
}
.adaptation {
  background: #0c141e;
  border-bottom: 1px solid var(--line);
}
.adaptation-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px 80px;
}
.adaptation h2 {
  font-size: clamp(2.5rem, 3.8vw, 3.8rem);
  line-height: 1.16;
}
.adaptation h2 span {
  color: var(--accent);
}
.model-adaptation {
  padding-top: 8px;
}
.model-adaptation h3 {
  font-size: 1.5rem;
  margin: 0 0 15px;
}
.model-adaptation > p:not(.quiet-label) {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}
.model-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 12px;
  padding: 24px 0;
  margin: 22px 0 0;
  border-top: 1px solid var(--line);
  font: 0.8125rem/1.5 var(--mono);
}
.model-adaptation p.adaptation-note {
  font-size: 0.8125rem;
  margin-bottom: 0;
  max-width: 390px;
}
.adaptation-flow {
  grid-column: 1/-1;
  list-style: none;
  display: flex;
  margin: 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--line);
  font: 0.8125rem/1.5 var(--mono);
  letter-spacing: 0.04em;
  justify-content: space-between;
  gap: 30px;
}
.adaptation-flow li {
  flex: 1;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.adaptation-flow li:not(:last-child):after {
  content: "→";
  color: var(--accent);
}
.relationship {
  border-top: 0;
}
.brand-relationship {
  display: grid;
  grid-template-columns: 1fr 150px 1fr;
  align-items: center;
  margin-top: 58px;
  margin-bottom: 65px;
  gap: 30px;
}
.brand-relationship h2 {
  font-size: 3.5rem;
}
.brand-relationship p {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 0;
}
.powers {
  font: 0.75rem var(--mono);
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 18px;
}
.powers span {
  font-size: 1.8rem;
  font-weight: normal;
}
.relationship-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line);
  padding-top: 25px;
  gap: 24px;
}
.product-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);margin:-28px 0 52px}.product-strip article{display:flex;flex-direction:column;gap:10px;padding:24px;background:var(--panel)}.product-strip b{font:1.35rem var(--mono);color:var(--accent)}.product-strip span{font-size:.85rem;line-height:1.5;color:var(--muted)}
.relationship-bottom h3 {
  font-size: 1rem;
  color: var(--muted);
  margin: 0;
}
footer {
  padding-block: 35px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
}
footer p,
footer a:not(.wordmark) {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
}
footer .wordmark {
  font-size: 0.8125rem;
}
.footer-company {
  text-align: right;
  letter-spacing: 0.045em;
}
.footer-company p {
  margin-bottom: 0;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 0.4;
  }
  50% {
    opacity: 1;
  }
}
@media (min-width: 1600px) {
  .hero {
    min-height: 800px;
  }
}
@media (max-width: 1050px) {
  .wrap {
    width: calc(100% - 64px);
  }
  .hero {
    column-gap: 30px;
    grid-template-columns: minmax(0, 1.8fr) minmax(180px, 0.7fr);
    min-height: 680px;
  }
  .hero h1 {
    font-size: clamp(2.35rem, 4.5vw, 3.5rem);
  }
  .architecture-layout {
    gap: 40px;
    grid-template-columns: 1fr 1.5fr;
  }
  .section-heading .eyebrow {
    min-width: 180px;
  }
  .section-heading {
    gap: 30px;
  }
  .brand-relationship {
    grid-template-columns: 1fr 90px 1fr;
    gap: 20px;
  }
  .brand-relationship h2 {
    font-size: 2.7rem;
  }
  .adaptation-inner {
    gap: 40px;
  }
}
@media (max-width: 760px) {
  .wrap {
    width: calc(100% - 40px);
  }
  .site-header {
    min-height: 94px;
    flex-wrap: wrap;
    gap: 6px;
    padding-block: 22px;
  }
  .site-header .wordmark {
    font-size: 0.875rem;
  }
  nav {
    gap: 20px;
    font-size: 0.75rem;
    flex-wrap: wrap;
  }
  .hero {
    grid-template-columns: 1fr;
    padding-top: 65px;
    padding-bottom: 95px;
    min-height: auto;
    gap: 45px;
  }
  .hero h1 {
    font-size: clamp(2rem, 6.7vw, 3.6rem);
  }
  .hero .eyebrow {
    font-size: 0.6875rem;
    letter-spacing: 0.025em;
    gap: 8px;
  }
  .hero .line {
    width: 15px;
  }
  .hero-system {
    width: min(100%, 330px);
    max-width: 330px;
    justify-self: center;
    margin-top: 0;
  }
  .wire-input {
    height: 35px;
  }
  .system-layer {
    min-height: 48px;
    margin-bottom: 12px;
  }
  .system-layer:after {
    bottom: -13px;
    height: 12px;
  }
  .hero-foot {
    font-size: 0.625rem;
    gap: 18px;
    line-height: 1.7;
  }
  .hero-foot > span {
    max-width: 165px;
  }
  .hero-foot a {
    align-items: center;
    gap: 10px;
  }
  .section {
    padding-block: 60px;
  }
  .section-heading {
    display: block;
    margin-bottom: 36px;
  }
  .section-heading .eyebrow {
    margin-bottom: 22px;
  }
  .section-heading h2 {
    width: auto;
    font-size: 2rem;
  }
  .architecture-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .architecture-notes {
    order: 2;
  }
  .architecture-notes .quiet-label {
    margin-bottom: 24px;
  }
  .architecture-notes dl {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .architecture-notes dl > div {
    margin: 0;
  }
  .pipeline li {
    grid-template-columns: 27px 1fr;
    gap: 12px;
    padding: 16px 14px;
    font-size: 0.75rem;
  }
  .step-end {
    display: none;
  }
  .capabilities {
    grid-template-columns: 1fr 1fr;
  }
  .capabilities article {
    padding: 25px 18px 25px 0;
    min-height: 190px;
  }
  .capabilities article:not(:nth-child(3n + 1)) {
    border-left: 0;
    padding-left: 0;
  }
  .capabilities article:nth-child(2n) {
    padding-left: 18px;
    border-left: 1px solid var(--line);
  }
  .capabilities h3 {
    font-size: 1rem;
    line-height: 1.4;
  }
  .capabilities p {
    font-size: 0.875rem;
  }
  .adaptation-inner {
    grid-template-columns: 1fr;
    gap: 35px;
  }
  .adaptation h2 {
    font-size: 2.5rem;
  }
  .adaptation-flow {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    font-size: 0.75rem;
  }
  .adaptation-flow li:nth-child(2):after {
    content: "↓";
  }
  .brand-relationship {
    grid-template-columns: 1fr;
    margin-block: 40px;
    gap: 27px;
  }
  .brand-relationship h2 {
    font-size: 2.8rem;
  }
  .powers {
    gap: 18px;
  }
  .powers span {
    transform: rotate(90deg);
  }
  .relationship-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }
  .product-strip{grid-template-columns:1fr;margin-top:0}
  footer {
    flex-wrap: wrap;
    gap: 24px;
  }
  .footer-company {
    margin-left: auto;
  }
  .model-list {
    gap: 18px 12px;
  }
  .intro {
    font-size: 1rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *:before,
  *:after {
    animation: none !important;
    transition: none !important;
  }
}

/* Supplied DeepThink brand artwork */
.brand-logo {
  display: block;
  width: 56px;
  height: 56px;
  object-fit: contain;
}
.hero {
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  column-gap: 40px;
}
.hero-logo {
  width: 100%;
  max-width: 470px;
  justify-self: center;
}
.hero-logo img {
  display: block;
  width: 100%;
  height: auto;
}
.hero-copy {
  min-width: 0;
}
@media (max-width: 1050px) and (min-width: 761px) {
  .hero {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    column-gap: 24px;
  }
  .hero h1 {
    font-size: clamp(2rem, 3.7vw, 3.5rem);
  }
}
@media (max-width: 760px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .hero-logo {
    max-width: 420px;
  }
  .brand-logo {
    width: 48px;
    height: 48px;
  }
}