:root {
  --ink: #101828;
  --muted: #556274;
  --line: #d9e1ea;
  --surface: #ffffff;
  --surface-alt: #f4f7fa;
  --navy: #081426;
  --navy-2: #10243d;
  --gold: #d9ad21;
  --gold-bright: #f5c542;
  --gold-soft: #fff7d6;
  --cyan: #26b7d5;
  --cyan-soft: #e2f7fb;
  --green: #1f9d75;
  --green-soft: #e4f6ef;
  --red: #dc5c5c;
  --radius: 20px;
  --shadow: 0 20px 55px rgba(8, 20, 38, 0.12);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 78px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.68;
}
img { display: block; max-width: 100%; height: auto; }
a { color: #076d84; }
button, a { -webkit-tap-highlight-color: transparent; }
code, pre { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }

.container { width: min(1180px, calc(100% - 42px)); margin: 0 auto; }
.narrow-container { width: min(860px, calc(100% - 42px)); margin: 0 auto; }

.skip-link {
  position: fixed;
  left: -9999px;
  top: 12px;
  z-index: 1000;
  padding: 10px 14px;
  border-radius: 9px;
  color: #fff;
  background: var(--navy);
}
.skip-link:focus { left: 12px; }

.top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
  background: rgba(8, 20, 38, 0.94);
  backdrop-filter: blur(14px);
}
.nav-inner { min-height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 900; letter-spacing: 0.08em; }
.brand-logo {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  object-fit: contain;
}
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a { color: #dce8f5; text-decoration: none; font-size: .94rem; font-weight: 700; }
.nav-links a:hover, .nav-links a:focus-visible { color: #fff; }
.nav-links .nav-paper { padding: 7px 15px; border: 1px solid rgba(255,255,255,.35); border-radius: 999px; }

.site-header {
  position: relative;
  overflow: hidden;
  padding: 72px 0 78px;
  color: #fff;
  background:
    radial-gradient(circle at 87% 13%, rgba(38, 183, 213, .22), transparent 28%),
    radial-gradient(circle at 7% 80%, rgba(245, 197, 66, .16), transparent 30%),
    linear-gradient(135deg, #07111f 0%, #0c1e34 58%, #15314d 100%);
}
.site-header::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .34;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
}
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(390px, .95fr); gap: 52px; align-items: center; }
.eyebrow, .section-kicker { margin: 0 0 12px; color: var(--gold-bright); font-size: .78rem; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
h1, h2, h3, h4, p { overflow-wrap: break-word; }
h1 { margin: 0; font-size: clamp(2.15rem, 4.4vw, 4.35rem); line-height: 1.04; letter-spacing: -.045em; }
h2 { margin: 0 0 18px; font-size: clamp(1.85rem, 3.4vw, 3rem); line-height: 1.12; letter-spacing: -.035em; }
h3 { margin: 0 0 10px; font-size: 1.24rem; line-height: 1.28; }
h4 { margin: 0; font-size: .98rem; }
.hero-summary { max-width: 760px; margin: 24px 0 0; color: #d8e4f1; font-size: 1.14rem; }
.authors { margin: 27px 0 3px; font-weight: 800; }
.affiliation { margin: 0; color: #b9c8d8; }
.button-row { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 28px; }
.button {
  display: inline-flex; min-height: 44px; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border: 1px solid rgba(255,255,255,.34); border-radius: 999px;
  color: #fff; background: rgba(255,255,255,.04); text-decoration: none; font-weight: 800;
  transition: transform .15s ease, background-color .15s ease, border-color .15s ease;
}
.button:hover, .button:focus-visible { transform: translateY(-2px); background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.62); }
.button.primary { border-color: var(--gold-bright); color: #2b2307; background: var(--gold-bright); }
.hero-visual { margin: 0; padding: 16px; border: 1px solid rgba(255,255,255,.17); border-radius: 24px; background: rgba(255,255,255,.96); box-shadow: var(--shadow); transform: rotate(.5deg); }
.hero-visual a { display: block; }
.hero-visual img { width: 100%; border-radius: 12px; }
.hero-visual figcaption { padding: 11px 5px 0; color: #566477; font-size: .86rem; line-height: 1.45; }

.quick-facts { position: relative; z-index: 5; margin-top: -31px; }
.facts-grid { display: grid; grid-template-columns: repeat(4, 1fr); overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: 0 18px 44px rgba(8,20,38,.1); }
.facts-grid article { min-height: 132px; display: flex; flex-direction: column; justify-content: center; padding: 24px 26px; border-right: 1px solid var(--line); }
.facts-grid article:last-child { border-right: 0; }
.facts-grid strong { color: var(--navy); font-size: clamp(1.7rem, 3vw, 2.5rem); letter-spacing: -.04em; }
.facts-grid span { color: var(--muted); font-size: .94rem; line-height: 1.45; }

.section { padding: 86px 0; }
.section-alt { background: var(--surface-alt); }
.section-dark { color: #f5f8fc; background: linear-gradient(145deg, #071321, #10253e); }
.section-heading { max-width: 850px; margin-bottom: 38px; }
.section-heading > p:last-child { color: var(--muted); font-size: 1.06rem; }
.section-heading.inverted > p:last-child { color: #bfd0e2; }
.text-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: 70px; align-items: start; }
.prose p { margin: 0 0 18px; }
.lead-prose { color: #334155; font-size: 1.08rem; }

.figure-shell { padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.figure-shell-dark { border-color: rgba(255,255,255,.14); }
.figure-shell img { width: 100%; }
.equivalence-grid { display: grid; grid-template-columns: .82fr .82fr 1.36fr; gap: 18px; margin-top: 22px; }
.equation-card { min-height: 210px; padding: 25px; border: 1px solid rgba(255,255,255,.14); border-radius: 18px; background: rgba(255,255,255,.065); }
.card-label { color: var(--gold-bright); font-size: .75rem; font-weight: 900; letter-spacing: .14em; text-transform: uppercase; }
.equation { margin: 15px 0 12px; color: #fff; font-family: Georgia, "Times New Roman", serif; font-size: clamp(1.55rem, 2.5vw, 2.2rem); }
.equation-card > p:last-child { margin-bottom: 0; color: #c6d5e5; }
.illustration-card { display: grid; place-items: center; padding: 12px; background: #fff; }
.illustration-card img { height: auto; }

.paper-figure { margin: 0; padding: 15px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 10px 35px rgba(8,20,38,.08); }
.paper-figure img { width: 100%; }
.paper-figure figcaption { padding: 13px 7px 2px; color: var(--muted); font-size: .9rem; }
.wide-figure { width: 100%; }
.node-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 19px; margin-top: 26px; }
.node-card { padding: 25px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.node-card p { margin: 8px 0 0; color: var(--muted); }
.node-icon { width: 25px; height: 25px; margin-bottom: 17px; border: 3px solid #162136; border-radius: 50%; }
.base-node .node-icon { background: #fff; }
.joint-node .node-icon { background: #d7dce3; }
.contact-node .node-icon { background: #101828; }
.split-section { display: grid; grid-template-columns: .78fr 1.22fr; gap: 48px; align-items: center; }
.section-copy > p { color: var(--muted); }
.check-list { margin: 24px 0 0; padding: 0; list-style: none; }
.check-list li { position: relative; margin: 11px 0; padding-left: 29px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--green); font-weight: 900; }

.result-block { margin-top: 28px; padding: 32px; border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: 0 10px 34px rgba(8,20,38,.055); }
.result-block + .result-block { margin-top: 26px; }
.result-heading { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr); gap: 32px; align-items: end; margin-bottom: 26px; }
.result-heading p { margin: 0; color: var(--muted); }
.result-number { display: block; margin-bottom: 7px; color: var(--gold); font-size: .78rem; font-weight: 900; letter-spacing: .15em; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; }
table { width: 100%; min-width: 720px; border-collapse: collapse; font-variant-numeric: tabular-nums; }
caption { padding: 12px 15px; color: var(--muted); background: #f8fafc; text-align: left; font-size: .84rem; }
th, td { padding: 13px 15px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: center; }
th:last-child, td:last-child { border-right: 0; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
thead th { color: #17243a; background: #eef3f7; font-size: .88rem; }
thead th span { color: var(--muted); font-weight: 600; }
tbody th { background: #f8fafc; text-align: left; }
.highlight-row th, .highlight-row td { background: var(--gold-soft); }
.delta-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; margin-top: 18px; }
.delta-grid div { padding: 17px; border-radius: 14px; background: var(--cyan-soft); }
.delta-grid strong { display: block; color: #08768b; font-size: 1.65rem; letter-spacing: -.04em; }
.delta-grid span { color: #315763; font-size: .83rem; line-height: 1.35; }

.bar-legend { display: flex; flex-wrap: wrap; gap: 19px; margin: 0 0 19px; color: var(--muted); font-size: .85rem; font-weight: 700; }
.bar-legend span::before { content: ""; display: inline-block; width: 12px; height: 12px; margin-right: 7px; border-radius: 3px; vertical-align: -1px; }
.legend-zero::before { background: #9ba8b8; }
.legend-one::before { background: var(--cyan); }
.legend-five::before { background: var(--green); }
.bar-chart { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
.bar-group { padding: 19px; border: 1px solid var(--line); border-radius: 15px; background: #fbfcfe; }
.bar-group h4 { margin-bottom: 12px; }
.bar-row { display: grid; grid-template-columns: 44px 1fr 48px; gap: 9px; align-items: center; margin-top: 7px; color: var(--muted); font-size: .78rem; }
.bar-row strong { color: var(--ink); font-size: .78rem; text-align: right; }
.bar-track { height: 10px; overflow: hidden; border-radius: 999px; background: #e8edf2; }
.bar { display: block; width: var(--bar); height: 100%; border-radius: inherit; }
.bar.zero { background: #9ba8b8; }
.bar.one { background: var(--cyan); }
.bar.five { background: var(--green); }
.chart-note { margin: 14px 0 0; color: var(--muted); font-size: .82rem; }
.data-details { margin-top: 20px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.data-details summary { cursor: pointer; padding: 15px 18px; font-weight: 800; }
.data-details[open] summary { border-bottom: 1px solid var(--line); }
.data-details .table-wrap { border: 0; border-radius: 0 0 14px 14px; }
.dense-table { min-width: 930px; }
.dense-table th, .dense-table td { padding: 11px 12px; font-size: .79rem; white-space: nowrap; }
.sim2real-block .paper-figure { margin-top: 3px; }
.real-metrics { display: grid; grid-template-columns: repeat(2, 1fr); gap: 17px; margin-top: 18px; }
.real-metrics article { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 22px; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: #f9fbfd; }
.robot-name { grid-column: 1 / -1; margin: 0; font-weight: 900; }
.real-metrics div strong { display: block; color: var(--navy); font-size: 1.65rem; letter-spacing: -.04em; }
.real-metrics div span { color: var(--muted); font-size: .8rem; }

.paper-section { color: #fff; background: linear-gradient(145deg, #0a1729, #132e4b); }
.citation-grid { display: grid; grid-template-columns: .68fr 1.32fr; gap: 50px; align-items: center; }
.paper-section p { color: #c5d4e4; }
.dark-button { margin-top: 9px; border-color: var(--gold-bright); color: #2b2307; background: var(--gold-bright); }
.contact-line { margin-top: 24px; }
.contact-line a { color: #9fe8f5; }
.citation-card { padding: 22px; border: 1px solid rgba(255,255,255,.14); border-radius: 18px; background: rgba(255,255,255,.06); }
.citation-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 12px; }
.citation-toolbar h3 { margin: 0; }
.copy-button { padding: 7px 13px; border: 1px solid rgba(255,255,255,.25); border-radius: 999px; color: #fff; background: transparent; cursor: pointer; font-weight: 800; }
.copy-button:hover, .copy-button:focus-visible { background: rgba(255,255,255,.1); }
pre { overflow-x: auto; margin: 0; padding: 18px; border-radius: 12px; color: #d8e7f7; background: #06101e; line-height: 1.55; font-size: .8rem; }
.copy-status { min-height: 1.4em; margin: 9px 0 0; color: #9fe8f5 !important; font-size: .82rem; }
.acknowledgements { padding-top: 54px; padding-bottom: 54px; text-align: center; }
.acknowledgements p:last-child { margin: 0; color: var(--muted); }
.site-footer { padding: 28px 0; color: #b9c7d6; background: #040b14; }
.footer-grid { display: flex; justify-content: space-between; gap: 22px; }
.site-footer p { margin: 0; font-size: .88rem; }

@media (max-width: 980px) {
  .hero-grid, .split-section, .citation-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 720px; transform: none; }
  .facts-grid { grid-template-columns: repeat(2, 1fr); }
  .facts-grid article:nth-child(2) { border-right: 0; }
  .facts-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .text-grid { grid-template-columns: 1fr; gap: 18px; }
  .equivalence-grid { grid-template-columns: 1fr 1fr; }
  .illustration-card { grid-column: 1 / -1; }
  .node-grid { grid-template-columns: 1fr; }
  .delta-grid { grid-template-columns: repeat(2, 1fr); }
  .result-heading { grid-template-columns: 1fr; gap: 7px; }
}

@media (max-width: 700px) {
  .container, .narrow-container { width: min(100% - 28px, 1180px); }
  .nav-links a:not(.nav-paper) { display: none; }
  .site-header { padding-top: 54px; }
  .hero-grid { grid-template-columns: 1fr; gap: 35px; }
  .quick-facts { margin-top: -20px; }
  .facts-grid { grid-template-columns: 1fr; }
  .facts-grid article { min-height: 105px; border-right: 0; border-bottom: 1px solid var(--line); }
  .facts-grid article:last-child { border-bottom: 0; }
  .section { padding: 64px 0; }
  .equivalence-grid, .bar-chart, .real-metrics { grid-template-columns: 1fr; }
  .illustration-card { grid-column: auto; }
  .delta-grid { grid-template-columns: 1fr 1fr; }
  .result-block { padding: 21px; }
  .real-metrics article { grid-template-columns: 1fr; }
  .robot-name { grid-column: auto; }
  .footer-grid { flex-direction: column; }
}

@media (max-width: 480px) {
  h1 { font-size: 2.1rem; }
  .button-row { flex-direction: column; }
  .button { width: 100%; }
  .delta-grid { grid-template-columns: 1fr; }
  .bar-row { grid-template-columns: 41px 1fr 42px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}

/* Prevent intrinsically wide code blocks and tables from expanding grid items. */
.citation-grid > *,
.citation-card,
.result-block,
.data-details,
.table-wrap,
.split-section > * {
  min-width: 0;
}
.citation-card pre {
  max-width: 100%;
}


/* --------------------------------------------------------------------------
   Wide hero layout and unmodified paper figures
   -------------------------------------------------------------------------- */
.hero-wide {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
}
.hero-copy-wide {
  width: 100%;
  max-width: none;
}
.hero-copy-wide h1 {
  width: 100%;
  max-width: none;
  font-size: clamp(2.65rem, 4.15vw, 4.65rem);
  line-height: 1.02;
  letter-spacing: -0.047em;
  text-wrap: balance;
}
.hero-copy-wide .hero-summary { max-width: 980px; }

/* Every paper figure is displayed from the original file in iros2026.zip.
   No fixed height, cropping, object-fit cover, or altered aspect ratio is used. */
.figure-shell img,
.paper-figure img,
.illustration-card img {
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: contain;
  aspect-ratio: auto;
}
.illustration-card { overflow: visible; }

/* --------------------------------------------------------------------------
   Embedded YouTube videos
   -------------------------------------------------------------------------- */
.hero-video-shell {
  width: 100%;
  margin: 0;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, .17);
  border-radius: 24px;
  background: rgba(255, 255, 255, .96);
  box-shadow: var(--shadow);
}
.hero-video-wide { max-width: none; }
.video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 14px;
  background: #000;
}
.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.video-caption {
  margin: 11px 5px 0;
  color: #566477;
  font-size: .86rem;
  line-height: 1.45;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
.video-card {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 10px 35px rgba(8, 20, 38, .08);
}

/* Only the sim-to-real evaluation remains in the Results section. */
#results .section-heading { max-width: 930px; }
#results .result-block { margin-top: 0; }

@media (min-width: 1280px) {
  .hero-wide.container { width: min(1320px, calc(100% - 72px)); }
  .hero-copy-wide h1 { font-size: clamp(3.1rem, 4.25vw, 5.15rem); }
}
@media (max-width: 980px) {
  .hero-wide { gap: 32px; }
  .video-grid { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .hero-copy-wide h1 {
    font-size: clamp(2.15rem, 10vw, 3.25rem);
    line-height: 1.04;
  }
  .hero-video-shell {
    padding: 10px;
    border-radius: 18px;
  }
}
@media (max-width: 480px) {
  .hero-copy-wide h1 { font-size: 2.05rem; }
}

/* --------------------------------------------------------------------------
   Paper-like mathematical typesetting
   -------------------------------------------------------------------------- */
.paper-equation {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  min-height: 92px;
  margin: 14px 0 16px;
  padding: 10px 2px 10px 18px;
  color: #fff;
}
.math-display {
  min-width: 0;
  text-align: center;
  font-size: clamp(1.55rem, 2.55vw, 2.35rem);
  line-height: 1.2;
}
.math-display mjx-container {
  margin: 0 !important;
  color: inherit;
}
.equation-number {
  min-width: 2.3em;
  padding-left: 10px;
  color: #d7e2ee;
  font-family: "Times New Roman", Times, serif;
  font-size: 1rem;
  text-align: right;
}

/* --------------------------------------------------------------------------
   Future-work section
   -------------------------------------------------------------------------- */
.future-work-section {
  /* Keep adjacent chapters visually distinct: Results uses the cool-gray
     surface-alt background, while Future Works uses a restrained warm tone. */
  background:
    radial-gradient(circle at 8% 10%, rgba(245, 197, 66, .13), transparent 30%),
    linear-gradient(180deg, #fffaf0 0%, #fffdf8 100%);
  border-top: 1px solid rgba(217, 173, 33, .18);
}
.future-work-section .section-heading { max-width: 980px; }
.future-direction { margin-top: 18px; }
.future-work-section .video-card h3 {
  margin: 18px 4px 7px;
  color: var(--navy);
}
.future-work-section .video-card > p {
  margin: 0 4px 4px;
  color: var(--muted);
  font-size: .92rem;
}
.result-conclusion {
  max-width: 930px;
  margin: 24px 4px 0;
  color: var(--muted);
}

@media (max-width: 700px) {
  .paper-equation {
    grid-template-columns: 1fr;
    padding-left: 0;
  }
  .equation-number {
    justify-self: end;
    margin-top: 4px;
  }
}
.math-display mjx-container[display="true"] { display: block; width: 100%; }
.math-display svg { display: inline-block; max-width: 100%; height: auto; }

/* --------------------------------------------------------------------------
   KING architecture: balanced editorial layout
   -------------------------------------------------------------------------- */
.architecture-section {
  overflow: hidden;
  background:
    radial-gradient(circle at 96% 8%, rgba(38, 183, 213, .08), transparent 24%),
    linear-gradient(180deg, #ffffff 0%, #fbfcfe 100%);
}
.architecture-intro {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  gap: clamp(38px, 6vw, 86px);
  align-items: end;
  margin-bottom: 34px;
}
.architecture-title h2 {
  max-width: 760px;
  margin-bottom: 0;
  font-size: clamp(2rem, 3.25vw, 3.25rem);
  text-wrap: balance;
}
.architecture-summary {
  max-width: 720px;
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.75;
}
.architecture-figure {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: clamp(12px, 1.7vw, 20px);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(8, 20, 38, .11);
}
.architecture-figure a {
  display: block;
}
.architecture-figure figcaption {
  padding: 14px 8px 2px;
  text-align: center;
}
.architecture-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 26px;
}
.architecture-step {
  position: relative;
  min-width: 0;
  padding: 23px 23px 21px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: rgba(255, 255, 255, .9);
  box-shadow: 0 8px 28px rgba(8, 20, 38, .045);
}
.architecture-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  width: 48px;
  height: 3px;
  border-radius: 0 0 999px 999px;
  background: var(--cyan);
}
.architecture-step:nth-child(2)::before { background: var(--gold); }
.architecture-step:nth-child(3)::before { background: var(--green); }
.architecture-step-number {
  display: block;
  margin-bottom: 8px;
  color: #78879a;
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .16em;
}
.architecture-step h3 {
  margin-bottom: 8px;
  font-size: 1.08rem;
}
.architecture-step p {
  margin: 0;
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.62;
}

@media (max-width: 900px) {
  .architecture-intro {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .architecture-summary { max-width: 820px; }
  .architecture-steps { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .architecture-title h2 { font-size: clamp(1.8rem, 9vw, 2.45rem); }
  .architecture-summary { font-size: .98rem; }
  .architecture-figure { padding: 9px; border-radius: 17px; }
  .architecture-figure figcaption { padding-top: 10px; font-size: .8rem; }
  .architecture-step { padding: 20px; }
}