/* ==========================================================================
   Rakana Technologies — homepage
   Light, editorial. Navy ink on warm paper, cyan used as a signal accent.
   ========================================================================== */

:root {
  --paper: #F5F3EE;
  --paper-2: #ECE8DF;
  --card: #FBFAF7;
  --ink: #071E43;
  --ink-2: #33415C;
  --muted: #6A7286;
  --rule: rgba(7, 30, 67, .14);
  --rule-strong: rgba(7, 30, 67, .32);
  --cyan: #00ADFD;
  --cyan-ink: #0070A8; /* cyan dark enough for text on paper */

  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;

  --wrap: 1200px;
  --gutter: clamp(16px, 4vw, 48px);
  --section: clamp(80px, 11vw, 150px);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 88px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-2);
  font: 400 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }

h1, h2, h3, h4 {
  color: var(--ink);
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -.015em;
  line-height: 1.08;
}
h1 em, h2 em { font-style: italic; font-weight: 300; }
p { margin: 0 0 1em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.sr-only, .skip:not(:focus) {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.skip:focus { position: fixed; top: 12px; left: 12px; z-index: 100; background: var(--ink); color: #fff; padding: 8px 14px; }

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

/* --- Shared type ------------------------------------------------------- */

.eyebrow {
  font: 500 12px/1.4 var(--mono);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 28px;
  display: flex; align-items: center; gap: 14px;
}
.eyebrow .num { color: var(--cyan-ink); }
.eyebrow .num::after {
  content: ""; display: inline-block; width: 36px; height: 1px;
  background: var(--rule-strong); vertical-align: middle; margin-left: 14px;
}

.section { padding: var(--section) 0; border-top: 1px solid var(--rule); }
.section-head { margin-bottom: clamp(48px, 6vw, 80px); }
.section-head h2 { font-size: clamp(36px, 5vw, 64px); max-width: 16ch; }
.section-head.split {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: end;
}
.section-intro { font-size: 18px; color: var(--ink-2); max-width: 46ch; margin: 0; }

/* --- Buttons & links --------------------------------------------------- */

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font: 500 15px/1 var(--sans);
  text-decoration: none;
  padding: 16px 26px;
  border-radius: 999px;
  transition: background .2s, color .2s, border-color .2s, transform .2s;
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: #0E2E63; transform: translateY(-1px); }
.btn-outline { border: 1px solid var(--rule-strong); color: var(--ink); }
.btn-outline:hover { border-color: var(--ink); }
.btn-link { color: var(--ink); padding-left: 6px; padding-right: 6px; }
.btn-link span, .inline-link span { transition: transform .2s; display: inline-block; }
.btn-link:hover span, .inline-link:hover span { transform: translateX(4px); }

.inline-link {
  display: inline-flex; gap: 8px;
  font: 500 14px/1 var(--mono);
  letter-spacing: .04em;
  color: var(--cyan-ink);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 4px;
}

/* --- Header ------------------------------------------------------------ */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(245, 243, 238, .86);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.site-header.scrolled { border-bottom-color: var(--rule); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand img { width: 168px; height: auto; }

.site-nav { display: flex; align-items: center; gap: 34px; }
.site-nav a {
  font: 500 14px/1 var(--sans);
  color: var(--ink-2);
  text-decoration: none;
  position: relative;
}
.site-nav a:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 1px;
  background: var(--ink); transform: scaleX(0); transform-origin: left; transition: transform .25s;
}
.site-nav a:not(.nav-cta):hover::after { transform: scaleX(1); }
.site-nav .nav-cta {
  color: var(--ink); border: 1px solid var(--rule-strong);
  padding: 11px 20px; border-radius: 999px; transition: background .2s, color .2s;
}
.site-nav .nav-cta:hover { background: var(--ink); color: #fff; }

.nav-toggle {
  display: none; background: none; border: 0; padding: 10px; margin-right: -10px; cursor: pointer;
}
.nav-toggle span:not(.sr-only) {
  display: block; width: 24px; height: 1.5px; background: var(--ink); margin: 6px 0; transition: transform .25s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(3.75px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-3.75px) rotate(-45deg); }

/* --- Hero -------------------------------------------------------------- */

.hero { padding: clamp(56px, 8vw, 110px) 0 clamp(64px, 8vw, 100px); }
.hero .eyebrow { display: block; }
.hero .eyebrow span { margin: 0 8px; }
.hero-grid {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(40px, 6vw, 96px); align-items: center;
}
.hero h1 {
  font-size: clamp(48px, 7.4vw, 104px);
  line-height: .98;
  letter-spacing: -.03em;
  margin-bottom: 36px;
}
.hero h1 em { color: var(--ink); }
.lede { font-size: clamp(18px, 1.6vw, 21px); line-height: 1.6; max-width: 38em; color: var(--ink-2); margin-bottom: 40px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px 24px; align-items: center; }

.hero-figure { margin: 0; }
.plan { width: 100%; height: auto; color: var(--ink); }
.plan .walls { fill: none; stroke: var(--ink); stroke-width: 1.5; opacity: .75; }
.plan .walls path:last-child { stroke-width: 1; opacity: .6; }
.plan .doors rect { fill: var(--paper); }
.plan .trail { fill: none; stroke: var(--cyan); stroke-width: 1.5; stroke-dasharray: 2 6; stroke-linecap: round; }
.plan .mover { fill: var(--cyan); }
.plan .ping circle { fill: var(--ink); }
.plan .ping .ring {
  fill: none; stroke: var(--cyan); stroke-width: 1.5;
  transform-box: fill-box; transform-origin: center;
  animation: ping 3.2s ease-out infinite; animation-delay: var(--d);
}
.plan .labels text { font: 500 10px var(--mono); letter-spacing: .08em; fill: var(--muted); }
@keyframes ping {
  0% { transform: scale(1); opacity: .9; }
  80%, 100% { transform: scale(6); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .plan .ping .ring { animation: none; opacity: .5; transform: scale(2.4); }
  .plan .mover { display: none; }
}
.hero-figure figcaption {
  margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--rule);
  font: 400 12px/1.4 var(--mono); letter-spacing: .06em; color: var(--muted);
}
.hero-figure figcaption span { color: var(--ink); margin-right: 10px; }

.figures {
  margin: clamp(64px, 8vw, 110px) 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--rule-strong);
}
.figures > div { padding: 28px 24px 0 0; border-right: 1px solid var(--rule); }
.figures > div + div { padding-left: 24px; }
.figures > div:last-child { border-right: 0; }
.figures dt {
  font: 300 clamp(40px, 4.4vw, 60px)/1 var(--serif); color: var(--ink); letter-spacing: -.02em; margin-bottom: 12px;
}
.figures dt span { color: var(--cyan-ink); }
.figures dd { margin: 0; font-size: 14px; line-height: 1.5; color: var(--muted); max-width: 22ch; }
.figures-note { margin: 28px 0 0; font: 400 12px var(--mono); letter-spacing: .04em; color: var(--muted); }

/* --- Purpose ----------------------------------------------------------- */

.purpose-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 96px); }
.purpose-item { border-top: 1px solid var(--ink); padding-top: 28px; }
.purpose-item h3 {
  font: 500 12px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--cyan-ink); margin-bottom: 22px;
}
.purpose-item p { font: 400 clamp(22px, 2.2vw, 28px)/1.4 var(--serif); color: var(--ink); letter-spacing: -.005em; margin: 0; }

.pull { margin: clamp(72px, 9vw, 120px) auto 0; max-width: 860px; text-align: center; }
.pull p {
  font: italic 300 clamp(30px, 3.8vw, 50px)/1.18 var(--serif); color: var(--ink); letter-spacing: -.02em; margin: 0;
}
.pull::before {
  content: ""; display: block; width: 10px; height: 10px; margin: 0 auto 32px;
  background: var(--cyan); clip-path: polygon(0 0, 0 100%, 100% 100%);
}

/* --- Applied AI -------------------------------------------------------- */

.ai-lanes { display: grid; grid-template-columns: 1fr 1.6fr; gap: clamp(32px, 5vw, 72px); }
.ai-lane { border-top: 1px solid var(--ink); padding-top: 28px; }
.ai-lane-label {
  font: 500 12px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--cyan-ink); margin-bottom: 22px;
}
.ai-lane h3 { font-size: clamp(26px, 2.6vw, 34px); margin-bottom: 18px; }
.ai-lane > p:last-child { max-width: 40ch; margin: 0; }

/* the lifecycle reads as a route: numbered stops joined by a dotted line */
.lifecycle {
  list-style: none; margin: 28px 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr); row-gap: 28px;
}
.lifecycle li {
  position: relative; padding: 26px 16px 0 0;
  font: 400 18px/1.3 var(--serif); color: var(--ink);
}
.lifecycle li::before { /* dotted route */
  content: ""; position: absolute; top: 5px; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, var(--cyan) 0 2px, transparent 2px 8px) 0 0 / 8px 1px repeat-x;
}
.lifecycle li::after { /* stop */
  content: ""; position: absolute; top: 0; left: 0; width: 11px; height: 11px; border-radius: 50%;
  background: var(--paper); border: 1.5px solid var(--ink);
}
.lifecycle li:nth-child(4n)::before { right: auto; width: 0; }
.lifecycle span {
  display: block; font: 500 11px/1 var(--mono); letter-spacing: .1em; color: var(--muted); margin-bottom: 8px;
}

/* a solid cyan stop travels 01 → 08 and loops, 2s per stage (8 × 2s = 16s cycle) */
.lifecycle li:nth-child(1) { --i: 0; }
.lifecycle li:nth-child(2) { --i: 1; }
.lifecycle li:nth-child(3) { --i: 2; }
.lifecycle li:nth-child(4) { --i: 3; }
.lifecycle li:nth-child(5) { --i: 4; }
.lifecycle li:nth-child(6) { --i: 5; }
.lifecycle li:nth-child(7) { --i: 6; }
.lifecycle li:nth-child(8) { --i: 7; }
.lifecycle li::after, .lifecycle span {
  animation: 16s linear infinite;
  animation-delay: calc(var(--i) * 2s);
}
.lifecycle li::after { animation-name: stage-dot; }
.lifecycle span { animation-name: stage-num; }
@keyframes stage-dot {
  0%, 100% { background: var(--paper); border-color: var(--ink); box-shadow: 0 0 0 0 rgba(0,173,253,0); }
  2%, 12.5% { background: var(--cyan); border-color: var(--cyan); box-shadow: 0 0 0 5px rgba(0,173,253,.18); }
  15% { background: var(--paper); border-color: var(--ink); box-shadow: 0 0 0 0 rgba(0,173,253,0); }
}
@keyframes stage-num {
  0%, 15%, 100% { color: var(--muted); }
  2%, 12.5% { color: var(--cyan-ink); }
}
@media (prefers-reduced-motion: reduce) {
  .lifecycle li::after, .lifecycle span { animation: none; }
}

.ai-test {
  margin-top: clamp(56px, 7vw, 96px);
  background: var(--ink); color: rgba(255,255,255,.8);
  border-radius: 4px;
  padding: clamp(32px, 5vw, 64px);
  position: relative; overflow: hidden;
}
.ai-test::after { /* logo triangle, echoing the portrait */
  content: ""; position: absolute; left: 0; bottom: 0; width: 56px; height: 68px;
  background: var(--cyan); clip-path: polygon(0 0, 0 100%, 100% 100%);
}
.ai-test .ai-lane-label { color: var(--cyan); }
.ai-test h3 { color: #fff; font-size: clamp(28px, 3.2vw, 42px); max-width: 22ch; }
.ai-test-head { margin-bottom: clamp(36px, 4vw, 56px); }
.ai-criteria {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(255,255,255,.22);
}
.ai-criteria li { padding: 28px 28px 0 0; }
.ai-criteria li + li { padding-left: 28px; border-left: 1px solid rgba(255,255,255,.14); }
.ai-criteria .num { font: italic 300 22px/1 var(--serif); color: var(--cyan); display: block; margin-bottom: 24px; }
.ai-criteria h4 { color: #fff; font-size: 28px; margin-bottom: 10px; }
.ai-criteria p { font-size: 15px; margin: 0; max-width: 30ch; }
.ai-verdict {
  margin: clamp(40px, 5vw, 64px) 0 0 auto; max-width: 40ch;
  font: italic 300 clamp(20px, 2vw, 26px)/1.35 var(--serif); color: #fff;
  padding-left: 24px; border-left: 2px solid var(--cyan);
}

/* --- Businesses: the stack -------------------------------------------- */

.businesses { background: var(--paper-2); }
.stack { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.layer {
  display: grid; grid-template-columns: 160px 1fr 260px; gap: 40px; align-items: start;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: clamp(28px, 3.4vw, 44px);
  position: relative;
  transition: border-color .3s, transform .3s;
}
.layer:hover { border-color: var(--rule-strong); }
/* the layers visually narrow as they rise — a stack, foundation widest */
.layer:nth-child(1) { margin: 0 clamp(0px, 4vw, 64px); }
.layer:nth-child(2) { margin: 0 clamp(0px, 2vw, 32px); }
.layer-base { background: var(--ink); border-color: var(--ink); }
.layer-base h3, .layer-base .layer-body p { color: #fff; }
.layer-base .layer-body p { opacity: .82; }
.layer-base .layer-index .num { color: var(--cyan); }
.layer-base .layer-tag { color: rgba(255,255,255,.6); }
.layer-base .chips li { color: #fff; border-color: rgba(255,255,255,.28); }
.layer-base .inline-link { color: var(--cyan); }

.layer-index { display: flex; flex-direction: column; gap: 10px; }
.layer-index .num { font: 300 56px/1 var(--serif); color: var(--cyan-ink); letter-spacing: -.02em; }
.layer-tag { font: 500 11px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.layer-body h3 { font-size: clamp(26px, 2.6vw, 34px); margin-bottom: 16px; }
.layer-body p { margin-bottom: 20px; max-width: 54ch; }
.layer-body p:last-child { margin-bottom: 0; }

.chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; align-content: flex-start; }
.chips li {
  font: 400 12px/1 var(--mono); letter-spacing: .03em; color: var(--ink-2);
  border: 1px solid var(--rule-strong); border-radius: 999px; padding: 9px 13px;
}

/* --- Portfolio --------------------------------------------------------- */

.company {
  display: grid; grid-template-columns: 1.5fr 1fr;
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  background: var(--card);
}
.company-main { padding: clamp(32px, 5vw, 64px); }
.company-logo { width: 220px; height: auto; margin-bottom: 40px; }
.company-kicker { font: 500 12px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--cyan-ink); margin-bottom: 18px; }
.company-main h3 { font-size: clamp(26px, 2.8vw, 38px); line-height: 1.15; margin-bottom: 24px; max-width: 22ch; }
.company-main p { max-width: 56ch; margin-bottom: 36px; }
.company-side { padding: clamp(32px, 5vw, 64px); border-left: 1px solid var(--rule); }
.company-side h4 {
  font: 500 11px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px;
}
.company-side h4:not(:first-child) { margin-top: 40px; }
.sectors { list-style: none; margin: 0; padding: 0; }
.sectors li {
  font: 400 19px/1.3 var(--serif); color: var(--ink);
  padding: 12px 0; border-bottom: 1px solid var(--rule);
}

/* --- Approach ---------------------------------------------------------- */

.principles {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--ink);
}
.principles li { padding: 32px 28px 0 0; }
.principles li + li { padding-left: 28px; border-left: 1px solid var(--rule); }
.principles .num { font: italic 300 22px/1 var(--serif); color: var(--cyan-ink); display: block; margin-bottom: 36px; }
.principles h3 { font-size: 26px; margin-bottom: 14px; }
.principles p { font-size: 15px; color: var(--ink-2); margin: 0; }

/* --- Leadership -------------------------------------------------------- */

.leadership { background: var(--paper-2); }
.leader { display: grid; grid-template-columns: 380px 1fr; gap: clamp(40px, 7vw, 110px); align-items: start; }
.portrait {
  aspect-ratio: 352 / 504; /* matches the portrait image so nothing is cropped */
  background:
    linear-gradient(135deg, rgba(0,173,253,.10), transparent 55%),
    var(--ink);
  border-radius: 4px;
  display: grid; place-items: center;
  position: relative; overflow: hidden;
}
.portrait::after { /* the logo's corner triangle, in front of the photo */
  content: ""; position: absolute; left: 0; bottom: 0; z-index: 2; width: 22%; aspect-ratio: 62 / 75;
  background: var(--cyan); clip-path: polygon(0 0, 0 100%, 100% 100%);
}
.portrait img { /* transparent cut-out, full width, anchored to the bottom edge */
  position: absolute; left: 0; bottom: 0; z-index: 1;
  width: 100%; height: auto;
}
.leader-name { font-size: clamp(44px, 5.4vw, 72px); letter-spacing: -.025em; margin-bottom: 18px; }
.leader-role {
  font: 400 13px/1.8 var(--mono); letter-spacing: .03em; color: var(--cyan-ink);
  padding-bottom: 28px; margin-bottom: 32px; border-bottom: 1px solid var(--rule-strong);
}
.leader-body > p:not(.leader-role):not(.leader-meta) { font-size: 18px; max-width: 58ch; }
.leader-meta { font-size: 14px; color: var(--muted); margin: 28px 0 32px; }

/* --- Contact ----------------------------------------------------------- */

.contact-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 64px; align-items: end; }
.contact h2 { font-size: clamp(44px, 6.4vw, 88px); letter-spacing: -.03em; margin-bottom: 28px; }
.contact .section-intro { margin-bottom: 48px; }
.email {
  display: inline-block;
  font: 300 clamp(30px, 4vw, 52px)/1.1 var(--serif);
  color: var(--ink); text-decoration: none; letter-spacing: -.02em;
  background: linear-gradient(var(--cyan), var(--cyan)) 0 100% / 100% 2px no-repeat;
  padding-bottom: 8px;
  transition: background-size .3s;
}
.email:hover { background-size: 100% 6px; }
.address {
  font: 400 17px/1.7 var(--sans); font-style: normal; color: var(--ink);
  border-top: 1px solid var(--ink); padding-top: 24px;
}
.address-label, .coords {
  display: block; font: 500 11px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted);
}
.address-label { margin-bottom: 18px; }
.coords { margin-top: 22px; letter-spacing: .08em; }

/* --- Footer ------------------------------------------------------------ */

.site-footer { background: var(--ink); color: rgba(255,255,255,.66); padding: 64px 0 36px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 32px; flex-wrap: wrap; }
.footer-inner img { width: 160px; height: auto; }
.footer-inner nav { display: flex; gap: 28px; flex-wrap: wrap; }
.footer-inner nav a { color: #fff; text-decoration: none; font-size: 14px; opacity: .8; }
.footer-inner nav a:hover { opacity: 1; }
.footer-base {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  margin-top: 48px; padding-top: 24px; position: relative;
  font: 400 12px/1.5 var(--mono); letter-spacing: .03em;
}
.footer-base::before {
  content: ""; position: absolute; top: 0; left: var(--gutter); right: var(--gutter);
  height: 1px; background: rgba(255,255,255,.14);
}
.footer-base p { margin: 0; }

/* --- Reveal on scroll --------------------------------------------------- */

.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s ease, transform .8s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* --- Responsive -------------------------------------------------------- */

@media (max-width: 1080px) {
  .site-nav { gap: 22px; }
  .ai-lanes { grid-template-columns: 1fr; }
  .layer { grid-template-columns: 110px 1fr; }
  .layer .chips { grid-column: 2; }
  .principles { grid-template-columns: 1fr 1fr; row-gap: 48px; }
  .principles li:nth-child(3) { padding-left: 0; border-left: 0; }
  .leader { grid-template-columns: 300px 1fr; }
}

@media (max-width: 900px) {
  .site-nav {
    position: fixed; inset: 76px 0 auto 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--rule);
    padding: 8px var(--gutter) 28px;
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: opacity .2s, transform .2s, visibility .2s;
  }
  .site-nav.open { transform: none; opacity: 1; visibility: visible; }
  .site-nav a { font-size: 18px; padding: 16px 0; width: 100%; border-bottom: 1px solid var(--rule); }
  .site-nav a:not(.nav-cta)::after { display: none; }
  .site-nav .nav-cta { margin-top: 20px; width: auto; border-bottom: 1px solid var(--rule-strong); padding: 14px 24px; }
  .nav-toggle { display: block; }

  .lifecycle { grid-template-columns: 1fr 1fr; }
  .lifecycle li:nth-child(2n)::before { right: auto; width: 0; }
  .hero-grid, .section-head.split, .purpose-grid, .company, .leader, .contact-grid { grid-template-columns: 1fr; }
  .section-head.split { gap: 24px; }
  .hero-figure { max-width: 480px; }
  .figures { grid-template-columns: 1fr 1fr; }
  .figures > div { padding: 24px 16px 28px 0; border-bottom: 1px solid var(--rule); }
  .figures > div:nth-child(2n) { border-right: 0; padding-left: 16px; }
  .figures > div:nth-child(2n+1) { padding-left: 0; }
  .company-side { border-left: 0; border-top: 1px solid var(--rule); }
  .leader .portrait { max-width: 320px; }
  .contact-grid { gap: 48px; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .brand img { width: 140px; }
  .layer { grid-template-columns: 1fr; gap: 20px; }
  .layer .chips { grid-column: auto; }
  .layer:nth-child(1), .layer:nth-child(2) { margin: 0; }
  .layer-index { flex-direction: row; align-items: baseline; gap: 14px; }
  .layer-index .num { font-size: 40px; }
  .lifecycle { grid-template-columns: 1fr; row-gap: 0; margin-top: 20px; }
  .lifecycle li { padding: 0 0 22px 30px; }
  .lifecycle li::before { top: 11px; bottom: 0; left: 5px; right: auto; width: 1px; height: auto;
    background: linear-gradient(180deg, var(--cyan) 0 2px, transparent 2px 7px) 0 0 / 1px 7px repeat-y; }
  .lifecycle li:nth-child(n)::before { right: auto; width: 1px; }
  .lifecycle li:last-child::before { display: none; }
  .lifecycle li::after { top: 2px; }
  .lifecycle span { display: inline-block; margin: 0 10px 0 0; }
  .ai-criteria { grid-template-columns: 1fr; }
  .ai-criteria li, .ai-criteria li + li { padding: 24px 0 0; border-left: 0; }
  .ai-criteria li + li { border-top: 1px solid rgba(255,255,255,.14); margin-top: 24px; }
  .ai-criteria .num { margin-bottom: 14px; }
  .ai-verdict { margin-left: 0; }
  .principles { grid-template-columns: 1fr; }
  .principles li, .principles li + li { padding: 28px 0 0; border-left: 0; }
  .principles li + li { border-top: 1px solid var(--rule); margin-top: 28px; }
  .principles .num { margin-bottom: 18px; }
  .email { font-size: 28px; word-break: break-word; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}