:root {
  --ink: #11120f;
  --ink-soft: #171915;
  --panel: #1d1f1a;
  --ivory: #f3eedf;
  --muted: #a8aa9d;
  --line: #35382f;
  --line-soft: #292c25;
  /* Martian red is the brand accent; the deep tone is reserved for interaction states. */
  --martian-red: #ff4700;
  --martian-red-deep: #e84200;
  --serif: "Iowan Old Style", Baskerville, "Times New Roman", serif;
  --sans: "Helvetica Neue", Inter, Arial, sans-serif;
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--ink);
  color: var(--ivory);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  border-right: 1px solid rgba(255, 71, 0, 0.025);
  border-left: 1px solid rgba(255, 71, 0, 0.025);
  content: "";
  pointer-events: none;
}

[hidden] {
  display: none !important;
}

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

a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--martian-red);
  outline-offset: 5px;
}

h1,
h2,
h3,
p,
dl,
dd {
  margin-top: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--martian-red);
  color: var(--ink);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: rgba(17, 18, 15, 0.96);
}

.header-inner,
.hero-shell,
.section-frame,
.principle-rail,
.site-footer {
  width: min(1512px, calc(100% - 64px));
  margin-inline: auto;
}

.header-inner {
  min-height: 82px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  width: max-content;
  font-size: 1.28rem;
  font-weight: 650;
  letter-spacing: -0.045em;
}

.brand-dot {
  width: 9px;
  height: 9px;
  margin-right: 11px;
  border-radius: 50%;
  background: var(--martian-red);
  box-shadow: 0 0 0 5px #252b19;
}

.header-note {
  color: #74786b;
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.desktop-nav {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 26px;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.desktop-nav a {
  padding-block: 10px;
  transition: color 180ms ease;
}

.desktop-nav a:hover,
.desktop-nav a:focus-visible {
  color: var(--ivory);
}

.desktop-nav .nav-beta {
  border-bottom: 1px solid var(--martian-red);
  color: var(--martian-red);
}

.account-nav-icon {
  position: relative;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 !important;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ivory);
}

.account-nav-icon:hover,
.account-nav-icon:focus-visible,
.account-nav-icon.is-authenticated {
  border-color: var(--martian-red);
}

.account-nav-icon svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.auth-indicator {
  position: absolute;
  top: -1px;
  right: -1px;
  width: 8px;
  height: 8px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--martian-red);
}

.account-body {
  min-height: 100vh;
}

.account-header .account-page-nav {
  gap: 20px;
}

.account-shell {
  width: min(1120px, calc(100% - 64px));
  min-height: calc(100vh - 82px);
  margin-inline: auto;
  display: grid;
  place-items: center;
  padding: 72px 0;
}

.account-panel {
  position: relative;
  width: min(880px, 100%);
  padding: clamp(42px, 7vw, 88px);
  border: 1px solid var(--line);
  background: var(--ink-soft);
}

.account-index {
  position: absolute;
  top: 30px;
  right: 30px;
  color: #63675a;
  font-size: 0.62rem;
  letter-spacing: 0.15em;
}

.account-panel h1 {
  max-width: 720px;
  font-size: clamp(3.4rem, 7vw, 6.7rem);
}

.account-lede {
  max-width: 680px;
  margin: 38px 0 0;
  color: #c7c6bb;
  font-size: clamp(1.02rem, 1.6vw, 1.25rem);
  line-height: 1.65;
}

.account-lede strong {
  color: var(--ivory);
  font-weight: 600;
}

.account-details {
  margin: 54px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.account-details div {
  min-width: 0;
  padding: 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.account-details dt,
.confirmation-note span {
  color: #74786b;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.account-details dd {
  margin: 8px 0 0;
  overflow-wrap: anywhere;
  color: var(--ivory);
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--martian-red);
}

.account-actions {
  margin-top: 46px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
}

.confirmation-panel {
  overflow: hidden;
}

.confirmation-mark {
  width: 74px;
  height: 74px;
  margin-bottom: 34px;
  color: var(--martian-red);
}

.confirmation-mark svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.confirmation-note {
  max-width: 680px;
  margin-top: 38px;
  padding: 24px 0 0 28px;
  border-top: 1px solid var(--line);
  border-left: 2px solid var(--martian-red);
}

.confirmation-note p {
  margin: 9px 0 0;
  color: var(--muted);
}

.mobile-nav {
  display: none;
}

.hero-shell {
  min-height: calc(100vh - 114px);
  display: grid;
  grid-template-columns: minmax(0, 58%) minmax(400px, 42%);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.hero-copy {
  min-height: 690px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 84px clamp(34px, 5vw, 82px) 50px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 28px;
  color: var(--martian-red);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 42px;
  height: 1px;
  background: var(--martian-red);
  content: "";
}

h1 {
  max-width: 790px;
  margin-bottom: 0;
  font-family: var(--serif);
  font-size: clamp(4.3rem, 6.3vw, 7.25rem);
  font-weight: 400;
  letter-spacing: -0.065em;
  line-height: 0.91;
  text-wrap: balance;
}

.hero-lede {
  width: min(620px, 87%);
  margin: 42px 0 0 9%;
  color: #c7c6bb;
  font-size: clamp(1.05rem, 1.35vw, 1.28rem);
  letter-spacing: -0.015em;
  line-height: 1.58;
}

.hero-actions {
  margin: 37px 0 0 9%;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border: 1px solid var(--line);
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  transition: border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.button:hover {
  border-color: var(--martian-red);
  transform: translateY(-2px);
}

.button-primary {
  border-color: var(--martian-red);
  background: var(--martian-red);
  color: var(--ink);
}

.button-primary:hover {
  background: var(--martian-red-deep);
}

.button-secondary span {
  margin-left: 22px;
  color: var(--martian-red);
  font-size: 0.9rem;
}

.hero-facts {
  margin: auto 0 0 9%;
  padding-top: 54px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
}

.hero-facts div {
  min-width: 0;
  padding: 16px 18px 15px 0;
  border-top: 1px solid var(--line);
}

.hero-facts dt {
  color: #686c60;
  font-size: 0.58rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-facts dd {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.72rem;
}

.memory-field {
  position: relative;
  min-height: 690px;
  border-left: 1px solid var(--line);
  background: var(--ink-soft);
  overflow: hidden;
}

.field-index {
  position: absolute;
  top: 32px;
  right: 32px;
  color: #63675a;
  font-size: 0.62rem;
  letter-spacing: 0.15em;
}

.memory-graph-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.field-activity {
  position: absolute;
  top: 32px;
  left: 31px;
  display: flex;
  align-items: center;
  gap: 9px;
  color: #63675a;
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.activity-marker {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--martian-red);
}

.field-caption {
  position: absolute;
  right: 31px;
  bottom: 28px;
  left: 31px;
  display: flex;
  justify-content: space-between;
  color: #777b6d;
  font-size: 0.58rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.principle-rail {
  min-height: 116px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.principle-rail p {
  margin: 0;
  padding: 31px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-right: 1px solid var(--line);
  color: #c7c6bb;
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2vw, 1.8rem);
}

.principle-rail p:last-child {
  border-right: 0;
}

.principle-rail span {
  color: var(--martian-red);
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.12em;
}

.section-frame {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.statement,
.model,
.contrast,
.security {
  display: grid;
  grid-template-columns: minmax(190px, 23%) 1fr;
}

.section-index {
  padding: 42px 31px;
  border-right: 1px solid var(--line);
}

.section-index span {
  color: var(--martian-red);
  font-size: 0.68rem;
  letter-spacing: 0.17em;
}

.section-index p {
  margin: 15px 0 0;
  color: #777b6d;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.statement-copy {
  padding: clamp(64px, 9vw, 130px) clamp(35px, 7vw, 108px);
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  align-items: end;
  gap: clamp(40px, 8vw, 120px);
}

.statement h2,
.model h2,
.contrast h2,
.security h2,
.beta h2 {
  margin-bottom: 0;
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.98;
  text-wrap: balance;
}

.statement h2 {
  font-size: clamp(3.2rem, 5.2vw, 6.4rem);
}

.statement-copy > p {
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.capability-grid article {
  min-height: 300px;
  padding: 35px 29px;
  border-right: 1px solid var(--line);
  transition: background 180ms ease;
}

.capability-grid article:last-child {
  border-right: 0;
}

.capability-grid article:hover {
  background: var(--panel);
}

.card-number,
.contrast-label {
  color: var(--martian-red);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.capability-grid h2 {
  margin: 105px 0 20px;
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: -0.035em;
}

.capability-grid p,
.contrast-grid p,
.security-list p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.65;
}

.model-content,
.contrast-content,
.security-content {
  padding: clamp(62px, 8vw, 118px) clamp(34px, 6vw, 94px);
}

.model-heading {
  max-width: 940px;
}

.model h2,
.security h2 {
  font-size: clamp(3rem, 5vw, 5.8rem);
}

.memory-steps {
  margin: 88px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.memory-steps li {
  min-height: 148px;
  padding: 27px 0;
  display: grid;
  grid-template-columns: 13% 1fr;
  align-items: start;
  border-bottom: 1px solid var(--line);
}

.step-number {
  padding-top: 8px;
  color: var(--martian-red);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
}

.memory-steps div {
  display: grid;
  grid-template-columns: minmax(150px, 0.5fr) minmax(240px, 1fr);
  gap: 40px;
}

.memory-steps h3,
.contrast-grid h3,
.security-list h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.7rem, 2.4vw, 2.7rem);
  font-weight: 400;
  letter-spacing: -0.04em;
}

.memory-steps p {
  max-width: 560px;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

.contrast h2 {
  max-width: 900px;
  font-size: clamp(3.2rem, 5.2vw, 6.1rem);
}

.contrast-grid {
  margin-top: 82px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.contrast-grid article {
  min-height: 320px;
  padding: 30px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.contrast-grid h3 {
  margin: 110px 0 19px;
  font-size: 2.1rem;
}

.contrast-grid .contrast-accent {
  background: var(--martian-red);
  color: var(--ink);
}

.contrast-accent .contrast-label,
.contrast-accent p {
  color: var(--ink);
}

.security-content {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: clamp(60px, 8vw, 130px);
}

.security-list {
  border-top: 1px solid var(--line);
}

.security-list article {
  padding: 27px 0 31px;
  display: grid;
  grid-template-columns: 44px minmax(150px, 0.8fr) minmax(220px, 1.2fr);
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.security-list span {
  color: var(--martian-red);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
}

.security-list h3 {
  font-size: 1.45rem;
}

.beta {
  min-height: 520px;
  padding: clamp(60px, 8vw, 110px);
  display: grid;
  grid-template-columns: 20% minmax(0, 1fr) 25%;
  align-items: end;
  gap: clamp(34px, 6vw, 90px);
  background: var(--ink-soft);
}

.beta-status {
  align-self: start;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--martian-red);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.beta-status span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--martian-red);
  box-shadow: 0 0 0 6px #273019;
}

.beta h2 {
  font-size: clamp(3.4rem, 5.8vw, 6.8rem);
}

.beta h2 + p {
  max-width: 700px;
  margin: 36px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.beta-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 26px;
}

.text-link {
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.text-link span {
  margin-left: 10px;
  color: var(--martian-red);
}

.site-footer {
  min-height: 118px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 30px;
  color: #777b6d;
  font-size: 0.68rem;
}

.site-footer .brand {
  color: var(--ivory);
}

.site-footer p {
  margin: 0;
}

.site-footer p:last-child {
  justify-self: end;
}

@media (max-width: 1100px) {
  .header-inner,
  .hero-shell,
  .section-frame,
  .principle-rail,
  .site-footer {
    width: min(100% - 32px, 1512px);
  }

  .header-note {
    display: none;
  }

  .header-inner {
    grid-template-columns: 1fr auto;
  }

  .hero-shell {
    grid-template-columns: 1fr;
  }

  .memory-field {
    min-height: 560px;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .statement-copy,
  .security-content {
    grid-template-columns: 1fr;
  }

  .capability-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .capability-grid article:nth-child(2) {
    border-right: 0;
  }

  .capability-grid article:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .contrast-grid {
    grid-template-columns: 1fr;
  }

  .contrast-grid article {
    min-height: 240px;
  }

  .contrast-grid h3 {
    margin-top: 64px;
  }

  .beta {
    grid-template-columns: 1fr;
    align-items: start;
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 74px;
  }

  .header-inner {
    min-height: 70px;
  }

  .desktop-nav {
    display: none;
  }

  .account-header .account-page-nav {
    display: flex;
  }

  .account-page-nav > a:not(.account-nav-icon) {
    display: none;
  }

  .mobile-nav {
    position: relative;
    display: block;
    justify-self: end;
  }

  .mobile-nav summary {
    cursor: pointer;
    color: var(--martian-red);
    font-size: 0.68rem;
    letter-spacing: 0.14em;
    list-style: none;
    text-transform: uppercase;
  }

  .mobile-nav summary::-webkit-details-marker {
    display: none;
  }

  .mobile-nav[open] nav {
    position: absolute;
    top: 41px;
    right: 0;
    width: min(280px, calc(100vw - 32px));
    display: grid;
    border: 1px solid var(--line);
    background: var(--ink);
  }

  .mobile-nav nav a {
    padding: 16px 18px;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  .mobile-nav nav a:last-child {
    border-bottom: 0;
    color: var(--martian-red);
  }

  .mobile-nav nav .mobile-account-link {
    width: 100%;
    height: auto;
    justify-content: flex-start;
    gap: 10px;
    padding: 16px 18px !important;
    border: 0;
    border-radius: 0;
  }

  .mobile-account-link .auth-indicator {
    top: 13px;
    right: 14px;
  }

  .account-shell {
    width: calc(100% - 32px);
    min-height: calc(100vh - 70px);
    place-items: start stretch;
    padding: 32px 0;
  }

  .account-panel {
    padding: 54px 24px 34px;
  }

  .account-index {
    top: 18px;
    right: 18px;
  }

  .account-panel h1 {
    font-size: clamp(2.75rem, 13vw, 4.2rem);
    overflow-wrap: anywhere;
  }

  .account-lede,
  .confirmation-note {
    margin-top: 28px;
  }

  .account-details {
    margin-top: 36px;
    grid-template-columns: 1fr;
  }

  .account-actions {
    margin-top: 34px;
    align-items: stretch;
    flex-direction: column;
    gap: 18px;
  }

  .account-actions .button {
    width: 100%;
  }

  .confirmation-mark {
    width: 62px;
    height: 62px;
    margin-bottom: 28px;
  }

  .confirmation-note {
    padding: 20px 0 0 18px;
  }

  .hero-copy {
    min-height: auto;
    padding: 70px 25px 50px;
  }

  h1 {
    font-size: clamp(3.55rem, 17vw, 5.6rem);
  }

  .hero-lede,
  .hero-actions,
  .hero-facts {
    width: 100%;
    margin-left: 0;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-facts {
    grid-template-columns: 1fr;
  }

  .memory-field {
    min-height: 460px;
  }

  .field-activity {
    top: 24px;
    left: 24px;
  }

  .principle-rail {
    grid-template-columns: repeat(2, 1fr);
  }

  .principle-rail p:nth-child(2) {
    border-right: 0;
  }

  .principle-rail p:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .statement,
  .model,
  .contrast,
  .security {
    grid-template-columns: 1fr;
  }

  .section-index {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 21px 25px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .section-index p {
    margin: 0;
  }

  .statement-copy,
  .model-content,
  .contrast-content,
  .security-content {
    padding: 68px 25px;
  }

  .capability-grid {
    grid-template-columns: 1fr;
  }

  .capability-grid article {
    min-height: 250px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .capability-grid article:last-child {
    border-bottom: 0;
  }

  .capability-grid h2 {
    margin-top: 78px;
  }

  .memory-steps li,
  .memory-steps div,
  .security-list article {
    grid-template-columns: 1fr;
  }

  .memory-steps li {
    gap: 16px;
  }

  .memory-steps div,
  .security-list article {
    gap: 14px;
  }

  .beta {
    min-height: auto;
    padding: 68px 25px;
  }

  .site-footer {
    padding-block: 34px;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .site-footer p:last-child {
    justify-self: start;
  }
}

@media (max-width: 420px) {
  .header-inner,
  .hero-shell,
  .section-frame,
  .principle-rail,
  .site-footer {
    width: calc(100% - 20px);
  }

  .brand {
    font-size: 1.12rem;
  }

  .account-shell {
    width: calc(100% - 20px);
  }

  .account-panel {
    padding-inline: 20px;
  }

  .field-caption {
    flex-direction: column;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}