:root {
  --navy-950: #061522;
  --navy-900: #081b2d;
  --navy-800: #102b43;
  --navy-700: #1b4567;
  --ink: #112235;
  --muted: #597087;
  --line: #d8e1e8;
  --paper: #f7f9fa;
  --white: #ffffff;
  --orange: #f26a2e;
  --orange-dark: #ca4815;
  --orange-soft: #fff0e8;
  --blue-soft: #eaf2f7;
  --max: 1240px;
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 106.25%; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 99;
  padding: .75rem 1rem;
  background: var(--white);
  color: var(--navy-900);
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto; column-gap: 1.5rem;
  align-items: center;
  min-height: 76px;
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  color: var(--white);
  background: rgba(6, 21, 34, .94);
  border-bottom: 1px solid rgba(255, 255, 255, .11);
  backdrop-filter: blur(16px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .68rem;
  width: fit-content;
  text-decoration: none;
  font-size: 1.23rem;
  font-weight: 760;
  letter-spacing: -.045em;
}
.brand-label { display: inline-flex; align-items: baseline; }
.brand-moving { color: currentColor; }
.brand-studio { color: var(--orange); margin-left: .18em; }
.brand-mark {
  position: relative;
  display: block;
  overflow: hidden;
  flex: 0 0 auto;
  background: var(--white);
}
.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.brand-mark-small {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: 0 0 0 1px rgba(255,255,255,.16);
}
nav { display: flex; gap: clamp(.8rem, 1.6vw, 1.6rem); flex-wrap: wrap; justify-content: center; }
nav a {
  color: rgba(255,255,255,.72);
  font-size: .95rem;
  text-decoration: none;
  transition: color .2s ease;
}
nav a:hover, nav a:focus-visible { color: var(--white); }
.product-status {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  color: rgba(255,255,255,.65);
  font-size: .95rem;
}
.product-status i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(242,106,46,.14);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(420px, .92fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: clamp(5rem, 9vw, 9rem) max(24px, calc((100vw - var(--max)) / 2));
  color: var(--white);
  overflow: hidden;
  background:
    linear-gradient(90deg, transparent 49.9%, rgba(255,255,255,.04) 50%, transparent 50.1%),
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px),
    radial-gradient(circle at 82% 40%, rgba(34, 98, 143, .5), transparent 34%),
    var(--navy-950);
  background-size: auto, 64px 64px, 64px 64px, auto, auto;
}
.hero::after {
  content: "";
  position: absolute;
  right: -7rem;
  top: 14%;
  width: 20rem;
  height: 20rem;
  border: 1px solid rgba(242,106,46,.33);
  border-radius: 50%;
}
.hero-copy, .hero-visual { position: relative; z-index: 1; }
.eyebrow, .section-index {
  margin: 0 0 1.4rem;
  color: var(--orange);
  font-size: .95rem;
  font-weight: 750;
  letter-spacing: .15em;
  text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 790px;
  margin-bottom: 1.8rem;
  font-size: clamp(3.5rem, 6.8vw, 7.3rem);
  font-weight: 690;
  letter-spacing: -.065em;
  line-height: .93;
}
h1 span { color: #a9c4d8; }
.hero-lead {
  max-width: 670px;
  margin-bottom: 2.3rem;
  color: rgba(255,255,255,.72);
  font-size: clamp(1.05rem, 1.5vw, 1.28rem);
  line-height: 1.65;
}
.hero-feature {
  max-width: 650px;
  margin: -0.6rem 0 1.8rem;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--orange);
  background: rgba(255,255,255,.055);
}
.hero-feature span {
  display: block;
  margin-bottom: .3rem;
  color: var(--orange);
  font-size: .95rem;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.hero-feature strong {
  color: rgba(255,255,255,.9);
  font-size: .98rem;
  line-height: 1.45;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 49px;
  padding: .8rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 100px;
  font-size: .95rem;
  font-weight: 680;
  text-decoration: none;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--orange); color: var(--white); }
.button-primary:hover { background: #ff793c; }
.button-secondary { border-color: rgba(255,255,255,.25); color: var(--white); }
.button-secondary:hover { border-color: rgba(255,255,255,.55); background: rgba(255,255,255,.06); }

.hero-visual { padding-top: 5.5rem; }
.mark-stage {
  position: relative;
  z-index: 2;
  width: clamp(170px, 16vw, 210px);
  aspect-ratio: 1;
  margin: 0 1.5rem -5rem auto;
  padding: .55rem;
  border: 1px solid rgba(255,255,255,.85);
  border-radius: 30px;
  background: var(--white);
  box-shadow: 0 30px 80px rgba(0,0,0,.34), 0 0 0 8px rgba(255,255,255,.06);
}
.brand-mark-hero {
  width: 100%;
  height: 100%;
  border-radius: 22px;
}
.system-card {
  position: relative;
  z-index: 1;
  padding: 1.1rem;
  padding-top: 6.6rem;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 24px;
  background: rgba(8,27,45,.72);
  box-shadow: 0 30px 80px rgba(0,0,0,.3);
  backdrop-filter: blur(18px);
}
.system-card-head {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap; gap: .5rem;
  padding: .3rem .5rem 1.1rem;
  color: rgba(255,255,255,.72);
  font-size: .95rem;
}
.live-label { color: var(--orange); }
.workflow { display: grid; gap: .55rem; margin: 0; padding: 0; list-style: none; }
.workflow li {
  display: grid;
  grid-template-columns: 42px 1fr;
  grid-template-areas: "number title" "number copy";
  align-items: center;
  padding: .86rem .9rem;
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 12px;
  background: rgba(255,255,255,.035);
}
.workflow li.active { border-color: rgba(242,106,46,.45); background: rgba(242,106,46,.09); }
.workflow span { grid-area: number; color: rgba(255,255,255,.38); font-size: .95rem; }
.workflow strong { grid-area: title; font-size: .95rem; }
.workflow small { grid-area: copy; color: rgba(255,255,255,.5); font-size: .95rem; }

.positioning, .transit-design, .model-families, .capabilities, .principles, .roadmap, .closing {
  width: min(var(--max), calc(100% - 48px));
  margin-inline: auto;
}
.positioning {
  display: grid;
  grid-template-columns: minmax(160px, .36fr) 1fr;
  gap: 4rem;
  padding: clamp(6rem, 10vw, 10rem) 0;
  border-bottom: 1px solid var(--line);
}
.positioning h2, .section-heading h2, .data-band h2, .closing h2 {
  margin-bottom: 1.5rem;
  font-size: clamp(2.5rem, 5vw, 5.2rem);
  font-weight: 660;
  letter-spacing: -.055em;
  line-height: 1;
}
.positioning > div > p {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.08rem;
}
.section-index { color: var(--orange-dark); }

.transit-design {
  position: relative;
  padding: clamp(6rem, 10vw, 10rem) 0;
  overflow: hidden;
}
.transit-design::before {
  content: "";
  position: absolute;
  right: -7rem;
  top: 8rem;
  width: 28rem;
  height: 28rem;
  border: 1px solid rgba(242,106,46,.18);
  border-radius: 50%;
  box-shadow: 0 0 0 4rem rgba(242,106,46,.035), 0 0 0 8rem rgba(16,43,67,.025);
  pointer-events: none;
}
.transit-intro {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(160px, .36fr) 1fr;
  gap: 4rem;
  align-items: start;
}
.transit-intro > div { max-width: 850px; }
.transit-kicker {
  width: fit-content;
  margin-bottom: 1.4rem;
  padding: .32rem .72rem;
  border-radius: 100px;
  color: #235f54;
  background: #e0f2ec;
  font-size: .95rem;
  font-weight: 760;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.transit-intro h2 {
  margin-bottom: 1.5rem;
  font-size: clamp(2.7rem, 5.5vw, 5.8rem);
  font-weight: 660;
  letter-spacing: -.058em;
  line-height: .98;
}
.transit-intro h2 span { color: var(--orange-dark); }
.transit-intro > div > p:last-child { max-width: 760px; color: var(--muted); font-size: 1.08rem; }
.transit-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: clamp(3.5rem, 6vw, 5rem);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}
.transit-grid article { min-height: 285px; padding: 2rem; background: var(--white); }
.transit-grid article:nth-child(2) { background: var(--blue-soft); }
.transit-grid article:nth-child(3) { background: var(--orange-soft); }
.transit-grid article > span {
  display: block;
  margin-bottom: 3.6rem;
  color: var(--orange-dark);
  font-size: .95rem;
  font-weight: 750;
  letter-spacing: .12em;
}
.transit-grid h3 { margin-bottom: .8rem; font-size: 1.25rem; letter-spacing: -.025em; }
.transit-grid p { margin-bottom: 0; color: var(--muted); font-size: .95rem; }
.transit-proof {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(150px, .28fr) 1fr;
  gap: 2rem;
  margin-top: 1rem;
  padding: 1.6rem 2rem;
  border-radius: var(--radius);
  color: var(--white);
  background: var(--navy-900);
}
.transit-proof strong { color: var(--orange); }
.transit-proof p { max-width: 830px; margin: 0; color: rgba(255,255,255,.68); }

.algorithm-edge {
  padding: clamp(5.5rem, 9vw, 8rem) max(24px, calc((100vw - var(--max)) / 2));
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(242,106,46,.12), transparent 28%),
    var(--navy-900);
}
.algorithm-edge .section-index { color: var(--orange); }
.algorithm-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: end;
}
.algorithm-intro h2 {
  margin-bottom: 0;
  font-size: clamp(2.8rem, 5.8vw, 6.2rem);
  font-weight: 660;
  letter-spacing: -.06em;
  line-height: .98;
}
.algorithm-intro h2 span { color: var(--orange); }
.algorithm-copy p {
  color: rgba(255,255,255,.7);
  font-size: 1.08rem;
}
.algorithm-copy p:first-child { color: var(--white); font-size: 1.22rem; }
.algorithm-stack {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: clamp(3.5rem, 6vw, 5rem);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.17);
  border-radius: 20px;
  background: rgba(255,255,255,.17);
}
.algorithm-stack article {
  min-height: 270px;
  padding: clamp(1.5rem, 2.4vw, 2.2rem);
  background: rgba(6,21,34,.82);
}
.algorithm-stack article:nth-child(2),
.algorithm-stack article:nth-child(5) { background: rgba(16,43,67,.92); }
.algorithm-stack article:nth-child(3) { background: rgba(242,106,46,.1); }
.algorithm-number {
  margin-bottom: 3.6rem;
  color: var(--orange);
  font-size: .95rem;
  font-weight: 750;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.algorithm-stack h3 {
  max-width: 260px;
  margin-bottom: .8rem;
  font-size: 1.25rem;
  letter-spacing: -.025em;
}
.algorithm-stack article > p:last-child {
  margin-bottom: 0;
  color: rgba(255,255,255,.62);
  font-size: .95rem;
}
.algorithm-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: clamp(3rem, 5vw, 4.5rem);
  border-top: 1px solid rgba(255,255,255,.18);
}
.algorithm-pillars article {
  min-height: 220px;
  padding: 2rem 2rem 1rem 0;
  border-right: 1px solid rgba(255,255,255,.18);
}
.algorithm-pillars article:not(:first-child) { padding-left: 2rem; }
.algorithm-pillars article:last-child { border-right: 0; }
.algorithm-pillars span {
  display: block;
  margin-bottom: 3.5rem;
  color: var(--orange);
  font-size: .95rem;
  font-weight: 750;
  letter-spacing: .12em;
}
.algorithm-pillars h3 { margin-bottom: .75rem; font-size: 1.25rem; }
.algorithm-pillars p { color: rgba(255,255,255,.62); font-size: .95rem; }
.benchmark-note {
  max-width: 680px;
  margin: 2rem 0 0;
  color: rgba(255,255,255,.46);
  font-size: .95rem;
}

.model-families { padding: clamp(6rem, 10vw, 10rem) 0; }
.model-families .section-heading { max-width: 940px; }
.model-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.model-card {
  min-height: 350px;
  padding: clamp(1.5rem, 2.4vw, 2.2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}
.model-card-accent { background: var(--orange-soft); border-color: #f1c2aa; }
.model-status {
  width: fit-content;
  margin-bottom: 3rem;
  padding: .3rem .65rem;
  border-radius: 100px;
  font-size: .95rem;
  font-weight: 760;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.status-research { color: #235f54; background: #e0f2ec; }
.status-integration { color: #a34317; background: var(--orange-soft); }
.model-card-accent .status-integration { background: var(--white); }
.model-card h3 { margin-bottom: .85rem; font-size: 1.4rem; letter-spacing: -.025em; }
.model-card > p:not(.model-status) { color: var(--muted); }
.model-methods {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}
.model-methods li {
  padding: .28rem .58rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  color: var(--navy-700);
  font-size: .95rem;
}
.model-scales {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: clamp(2rem, 5vw, 5rem);
  margin-top: 1rem;
  padding: clamp(2rem, 4vw, 3.5rem);
  border-radius: var(--radius);
  color: var(--white);
  background: var(--navy-900);
}
.model-scales-intro .model-status { margin-bottom: 2rem; }
.model-scales-intro h3 { margin-bottom: .8rem; font-size: clamp(1.7rem, 3vw, 2.6rem); letter-spacing: -.04em; }
.model-scales-intro > p:last-child { max-width: 500px; color: rgba(255,255,255,.62); }
.model-scales ol { display: grid; gap: .6rem; margin: 0; padding: 0; list-style: none; }
.model-scales li {
  display: grid;
  grid-template-columns: 44px 1fr;
  grid-template-areas: "number title" "number copy";
  align-items: center;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px;
  background: rgba(255,255,255,.045);
}
.model-scales li span { grid-area: number; color: var(--orange); font-size: .95rem; }
.model-scales li strong { grid-area: title; font-size: .95rem; }
.model-scales li small { grid-area: copy; color: rgba(255,255,255,.52); font-size: .95rem; }

.capabilities { padding: clamp(6rem, 10vw, 10rem) 0; }
.section-heading { max-width: 810px; margin-bottom: 3.5rem; }
.section-heading > p:last-child { max-width: 650px; color: var(--muted); font-size: 1.05rem; }
.capability-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; }
.capability {
  grid-column: span 4;
  min-height: 310px;
  padding: clamp(1.5rem, 2.4vw, 2.2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}
.capability-large { grid-column: span 7; }
.capability-large + .capability { grid-column: span 5; }
.capability-wide { grid-column: span 6; }
.capability-number {
  margin-bottom: 3.5rem;
  color: #93a5b4;
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .12em;
}
.capability h3 { margin-bottom: .85rem; font-size: 1.35rem; letter-spacing: -.025em; }
.capability > p:not(.capability-number) { color: var(--muted); }
.accent-card { background: var(--orange-soft); border-color: #f1c2aa; }
.dark-card { color: var(--white); background: var(--navy-900); border-color: var(--navy-900); }
.dark-card > p:not(.capability-number) { color: rgba(255,255,255,.65); }
.tag-list { display: flex; flex-wrap: wrap; gap: .45rem; margin: 1.5rem 0 0; padding: 0; list-style: none; }
.tag-list li { padding: .32rem .68rem; border: 1px solid var(--line); border-radius: 100px; color: var(--navy-700); font-size: .95rem; }
.scale-line { display: flex; align-items: center; gap: .75rem; margin-top: 2rem; color: var(--navy-700); font-size: .95rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.scale-line i { flex: 1; height: 1px; background: linear-gradient(90deg, var(--navy-700), var(--orange)); }

.principles {
  padding: 0 0 clamp(6rem, 10vw, 10rem);
}
.principle-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.principle-grid article { padding: 2rem 2rem 1rem 0; border-right: 1px solid var(--line); }
.principle-grid article:not(:first-child) { padding-left: 2rem; }
.principle-grid article:last-child { border-right: 0; }
.principle-grid strong { display: block; margin-bottom: 3rem; color: var(--orange-dark); font-size: .95rem; }
.principle-grid h3 { font-size: 1.1rem; }
.principle-grid p { color: var(--muted); font-size: .95rem; }

.data-band {
  padding: clamp(5rem, 9vw, 9rem) max(24px, calc((100vw - var(--max)) / 2));
  color: var(--white);
  background: var(--navy-800);
}
.data-band > p:not(.section-index) { max-width: 690px; color: rgba(255,255,255,.66); font-size: 1.05rem; }
.format-list { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 3rem; }
.format-list span { padding: .55rem .85rem; border: 1px solid rgba(255,255,255,.18); border-radius: 7px; color: rgba(255,255,255,.76); font-size: .95rem; }

.roadmap { padding: clamp(6rem, 10vw, 10rem) 0; }
.roadmap-columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.roadmap-columns article { padding: 2rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.status-label { width: fit-content; padding: .28rem .62rem; border-radius: 100px; font-size: .95rem; font-weight: 750; letter-spacing: .05em; text-transform: uppercase; }
.status-now { color: #235f54; background: #e0f2ec; }
.status-building { color: #a34317; background: var(--orange-soft); }
.status-direction { color: #355d7b; background: var(--blue-soft); }
.roadmap-columns h3 { margin: 1.5rem 0 1rem; font-size: 1.4rem; }
.roadmap-columns ul { margin: 0; padding-left: 1.1rem; color: var(--muted); }
.roadmap-columns li { margin-bottom: .55rem; }

.closing {
  padding: clamp(5rem, 9vw, 9rem) 0;
  border-top: 1px solid var(--line);
}
.closing h2 span { color: var(--orange); }
.closing > p:not(.eyebrow) { max-width: 660px; color: var(--muted); font-size: 1.08rem; }
.text-link { display: inline-flex; gap: .5rem; margin-top: 1.5rem; color: var(--navy-700); font-weight: 700; text-decoration: none; }
.text-link span { color: var(--orange); }

footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 2rem;
  align-items: center;
  padding: 2rem max(24px, calc((100vw - var(--max)) / 2));
  color: rgba(255,255,255,.55);
  background: var(--navy-950);
  font-size: .95rem;
}
.brand-footer { color: var(--white); }
footer p { margin: 0; }

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; }
  nav { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-visual { max-width: 640px; }
  .system-card { max-width: 640px; }
  .capability, .capability-large, .capability-large + .capability, .capability-wide { grid-column: span 6; }
  .principle-grid { grid-template-columns: repeat(2, 1fr); }
  .algorithm-intro { grid-template-columns: 1fr; gap: 2rem; }
  .algorithm-stack { grid-template-columns: repeat(2, 1fr); }
  .model-grid { grid-template-columns: repeat(2, 1fr); }
  .model-scales { grid-template-columns: 1fr; }
  .transit-grid { grid-template-columns: repeat(2, 1fr); }
  .algorithm-pillars { grid-template-columns: 1fr; }
  .algorithm-pillars article, .algorithm-pillars article:not(:first-child) { min-height: 0; padding: 1.7rem 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.18); }
  .algorithm-pillars article:last-child { border-bottom: 0; }
  .algorithm-pillars span { margin-bottom: 1.4rem; }
  .principle-grid article:nth-child(2) { border-right: 0; }
  .roadmap-columns { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .site-header { min-height: 66px; }
  .product-status { font-size: 0; }
  .hero { min-height: calc(100vh - 66px); padding-top: 4.5rem; }
  .hero-visual { padding-top: 3.5rem; }
  .mark-stage { width: 150px; margin-right: 1rem; margin-bottom: -3.5rem; border-radius: 24px; }
  .brand-mark-hero { border-radius: 17px; }
  .system-card { padding-top: 4.7rem; }
  h1 { font-size: clamp(3.1rem, 16vw, 5rem); }
  .positioning { grid-template-columns: 1fr; gap: 1rem; }
  .transit-intro { grid-template-columns: 1fr; gap: 1rem; }
  .transit-grid { grid-template-columns: 1fr; }
  .transit-grid article { min-height: 0; }
  .transit-grid article > span { margin-bottom: 2.2rem; }
  .transit-proof { grid-template-columns: 1fr; gap: .6rem; }
  .algorithm-stack { grid-template-columns: 1fr; }
  .algorithm-stack article { min-height: 0; }
  .algorithm-number { margin-bottom: 2.2rem; }
  .model-grid { grid-template-columns: 1fr; }
  .model-card { min-height: 0; }
  .model-status { margin-bottom: 2.2rem; }
  .capability-grid { display: block; }
  .capability { min-height: 0; margin-bottom: .8rem; }
  .capability-number { margin-bottom: 2.2rem; }
  .principle-grid { grid-template-columns: 1fr; }
  .principle-grid article, .principle-grid article:not(:first-child) { padding: 1.7rem 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .principle-grid strong { margin-bottom: 1.4rem; }
  footer { grid-template-columns: 1fr; gap: .5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}