@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@400;500;600;700&display=swap');

:root {
  --ink: #07162c;
  --navy: #06162d;
  --navy-2: #0a203a;
  --navy-3: #142c48;
  --mist: #edf1f6;
  --paper: #f7f9fc;
  --white: #ffffff;
  --cyan: #9db7d2;
  --cyan-2: #2b63ad;
  --lime: #4f86d9;
  --muted: #94a5b8;
  --line: rgba(255,255,255,.12);
  --line-dark: rgba(7,16,25,.13);
  --mono: "DM Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
  --sans: "Manrope", Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
body.nav-open { overflow: hidden; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
svg { display: block; }
.shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 10px; left: 10px; z-index: 100; padding: 10px 14px; color: var(--ink); background: var(--lime); border-radius: 8px; transform: translateY(-150%); transition: transform .2s; }
.skip-link:focus { transform: translateY(0); }

.site-header { position: fixed; inset: 0 0 auto; z-index: 50; height: 78px; color: var(--white); border-bottom: 1px solid transparent; transition: background .25s, border-color .25s, backdrop-filter .25s; }
.site-header.scrolled { background: rgba(6,16,25,.86); border-color: var(--line); backdrop-filter: blur(16px); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; font-size: .9rem; font-weight: 700; letter-spacing: .14em; }
.brand b { color: var(--cyan); font-weight: 700; }
.brand-emblem { position: relative; width: 40px; height: 40px; overflow: hidden; flex: 0 0 40px; border-radius: 12px; background: white; box-shadow: 0 5px 18px rgba(0,0,0,.18); }
.brand-emblem img { display: block; width: 100%; height: 100%; object-fit: contain; transform: scale(1.04); }
.main-nav { display: flex; align-items: center; gap: 30px; font-size: .88rem; font-weight: 600; }
.main-nav a { text-decoration: none; color: rgba(255,255,255,.76); transition: color .2s; }
.main-nav a:hover, .main-nav a:focus-visible { color: var(--white); }
.language-switch { display: inline-flex; align-items: center; gap: 2px; padding: 3px; border: 1px solid var(--line); border-radius: 999px; }
.main-nav .language-switch a { min-width: 32px; padding: 4px 7px; border: 0; border-radius: 999px; font: 500 .68rem/1.4 var(--mono); text-align: center; }
.main-nav .language-switch a[aria-current="page"] { color: var(--white); background: rgba(79,134,217,.34); }
.main-nav .nav-cta { padding: 10px 17px; color: var(--ink); background: var(--lime); border-radius: 999px; }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); color: white; background: transparent; border-radius: 12px; align-items: center; justify-content: center; flex-direction: column; gap: 6px; }
.menu-toggle > span:not(.sr-only) { width: 19px; height: 1px; background: currentColor; transition: transform .2s; }

.hero { position: relative; min-height: 760px; height: min(900px, 100svh); overflow: hidden; display: flex; align-items: center; background: var(--navy); color: var(--white); }
.hero-media { position: absolute; inset: 0; background-image: linear-gradient(90deg, rgba(6,16,25,.99) 3%, rgba(6,16,25,.86) 35%, rgba(6,16,25,.25) 70%, rgba(6,16,25,.1)), linear-gradient(0deg, #061019 0%, transparent 34%), url("assets/lokirail-hero.png"); background-size: cover; background-position: center; opacity: .92; transform: scale(1.01); }
.hero-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(94,144,207,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(94,144,207,.045) 1px, transparent 1px); background-size: 80px 80px; mask-image: linear-gradient(90deg, black, transparent 68%); }
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0,1.1fr) minmax(390px,.8fr); gap: 60px; align-items: center; padding-top: 72px; }
.hero-copy { max-width: 720px; }
.eyebrow, .kicker { margin: 0 0 20px; font: 500 .76rem/1.2 var(--mono); letter-spacing: .13em; text-transform: uppercase; }
.eyebrow { color: var(--cyan); }
.eyebrow > span { display: inline-block; width: 22px; height: 1px; margin: 0 10px 3px 0; background: var(--lime); }
.hero h1, h2, h3, p { margin-top: 0; }
.hero h1 { max-width: 720px; margin-bottom: 24px; font-size: clamp(3.35rem, 6.2vw, 6.15rem); line-height: .98; letter-spacing: -.06em; font-weight: 500; }
.hero h1 em { color: var(--lime); font-style: normal; }
.hero-lead { max-width: 650px; margin-bottom: 32px; color: rgba(255,255,255,.72); font-size: clamp(1.02rem, 1.5vw, 1.17rem); line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 12px; padding: 0 20px; border: 1px solid transparent; border-radius: 999px; text-decoration: none; font-size: .92rem; font-weight: 700; transition: transform .2s, background .2s, border-color .2s; }
.button:hover { transform: translateY(-2px); }
.button svg { width: 20px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.button-primary { color: var(--white); background: var(--lime); box-shadow: 0 12px 35px rgba(55,103,172,.22); }
.button-primary:hover { background: #6598e4; }
.button-ghost { color: var(--white); border-color: rgba(255,255,255,.24); background: rgba(6,16,25,.28); backdrop-filter: blur(8px); }
.button-ghost:hover { border-color: rgba(255,255,255,.5); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 24px; margin: 38px 0 0; padding: 0; list-style: none; color: rgba(255,255,255,.54); font: 400 .72rem/1.2 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.hero-tags li::before { content: "+"; color: var(--cyan); margin-right: 8px; }

.signal-card { align-self: end; margin-bottom: 50px; padding: 20px; background: rgba(7,20,38,.78); border: 1px solid rgba(94,144,207,.28); border-radius: var(--radius); box-shadow: 0 30px 90px rgba(0,0,0,.35); backdrop-filter: blur(18px); }
.signal-topline { display: flex; justify-content: space-between; align-items: center; padding-bottom: 18px; border-bottom: 1px solid var(--line); color: rgba(255,255,255,.55); font: 400 .69rem/1.2 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.live-pill { display: flex; align-items: center; gap: 7px; color: var(--lime); }
.live-pill i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; box-shadow: 0 0 0 5px rgba(55,103,172,.14); }
.signal-visual { min-height: 285px; display: grid; grid-template-columns: minmax(190px,1.2fr) 34px minmax(110px,.8fr); align-items: center; }
.sensor-stack { display: grid; gap: 8px; }
.sensor-stack > span { display: grid; grid-template-columns: 45px 1fr; align-items: center; padding: 9px 11px; color: var(--cyan); border: 1px solid rgba(94,144,207,.2); border-radius: 8px; background: rgba(94,144,207,.06); font: 500 .68rem/1.2 var(--mono); }
.sensor-stack small { color: rgba(255,255,255,.4); font-size: .57rem; text-transform: uppercase; }
.sensor-stack > .sensor-optional { grid-template-columns: 45px minmax(0,1fr); align-items: start; padding: 8px 9px; border-style: dashed; border-color: rgba(94,144,207,.42); background: rgba(94,144,207,.035); }
.sensor-optional b { padding-top: 1px; font: inherit; }
.sensor-optional-content { display: grid; min-width: 0; gap: 3px; }
.sensor-optional-top { display: flex; min-width: 0; align-items: center; justify-content: space-between; gap: 5px; }
.sensor-optional-top small { min-width: 0; }
.sensor-optional em { color: rgba(255,255,255,.54); font: normal .47rem/1.35 var(--mono); }
.sensor-optional i { flex: 0 0 auto; padding: 3px 5px; border: 1px solid rgba(94,144,207,.42); border-radius: 999px; color: var(--lime); font: normal 500 .42rem/1 var(--mono); letter-spacing: .04em; text-transform: uppercase; }
.signal-lines { display: grid; gap: 34px; overflow: hidden; }
.signal-lines i { width: 100%; height: 1px; background: linear-gradient(90deg, var(--cyan), rgba(94,144,207,.1)); position: relative; }
.signal-lines i::after { content: ""; position: absolute; width: 18px; height: 1px; background: var(--lime); animation: flow 2s linear infinite; }
.signal-lines i:nth-child(2)::after { animation-delay: .3s; }
.signal-lines i:nth-child(3)::after { animation-delay: .6s; }
.signal-lines i:nth-child(4)::after { animation-delay: .9s; }
.signal-lines i:nth-child(5)::after { animation-delay: 1.2s; }
@keyframes flow { from { transform: translateX(-20px); } to { transform: translateX(50px); } }
.engine-node { position: relative; width: 105px; height: 105px; margin: auto; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 1px solid rgba(79,134,217,.45); border-radius: 50%; color: var(--white); background: radial-gradient(circle, rgba(79,134,217,.18), rgba(6,22,45,.92) 66%); box-shadow: 0 0 42px rgba(79,134,217,.12); }
.engine-node b { font-size: 1.35rem; letter-spacing: -.03em; }
.engine-node small { color: var(--muted); font: .53rem var(--mono); text-transform: uppercase; }
.node-orbit { position: absolute; inset: -10px; border: 1px dashed rgba(94,144,207,.3); border-radius: 50%; animation: spin 16s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.signal-output { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; padding-top: 14px; border-top: 1px solid var(--line); }
.signal-output div { padding: 10px; border-radius: 8px; background: rgba(255,255,255,.035); }
.signal-output span, .signal-output strong { display: block; }
.signal-output span { color: var(--muted); font-size: .63rem; }
.signal-output strong { margin-top: 2px; font: 500 .65rem var(--mono); color: var(--white); }
.hero-foot { position: absolute; z-index: 3; bottom: 25px; left: 50%; transform: translateX(-50%); display: flex; align-items: center; gap: 18px; color: rgba(255,255,255,.36); font: .61rem var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.track-line { position: relative; flex: 1; height: 1px; background: rgba(255,255,255,.18); }
.track-line::after { content: ""; position: absolute; right: 28%; top: -3px; width: 7px; height: 7px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 12px var(--lime); }

.section { padding: 120px 0; }
.section-heading { margin-bottom: 56px; }
.section-heading.two-col, .proof-heading { display: grid; grid-template-columns: 1.15fr .85fr; gap: 80px; align-items: end; }
.kicker { color: #526f93; }
h2 { margin-bottom: 0; font-size: clamp(2.2rem, 4.2vw, 4rem); line-height: 1.08; letter-spacing: -.055em; font-weight: 500; }
.section-heading > p, .section-lead { margin-bottom: 4px; color: #50616a; font-size: 1.02rem; line-height: 1.75; }
.challenge-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
.challenge-card { position: relative; min-height: 300px; padding: 30px; overflow: hidden; border: 1px solid var(--line-dark); border-radius: var(--radius); background: var(--white); transition: transform .3s, border-color .3s, box-shadow .3s; }
.challenge-card:hover { transform: translateY(-5px); border-color: rgba(43,99,173,.45); box-shadow: 0 20px 45px rgba(7,22,44,.09); }
.card-index { position: absolute; top: 24px; right: 26px; color: #9da8ac; font: .65rem var(--mono); }
.icon-box { position: relative; width: 62px; height: 62px; margin-bottom: 42px; display: grid; place-items: center; color: rgba(255,255,255,.94); border: 1px solid rgba(94,144,207,.28); border-radius: 18px; background: linear-gradient(145deg,#102d4e,#071c35); box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 10px 24px rgba(7,28,53,.16); transition: transform .3s, background .3s, box-shadow .3s; }
.icon-box svg { width: 36px; height: 36px; fill: none; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
.icon-box .icon-node { fill: #6aa7f7; stroke: none; }
.challenge-card:hover .icon-box { transform: translateY(-2px); background: linear-gradient(145deg,#17477b,#0a274a); box-shadow: inset 0 1px 0 rgba(255,255,255,.1), 0 14px 30px rgba(7,28,53,.22); }
.challenge-card h3 { margin-bottom: 12px; font-size: 1.22rem; letter-spacing: -.03em; }
.challenge-card p { margin-bottom: 0; color: #66747b; font-size: .92rem; }

.technology { overflow: hidden; color: var(--white); background: var(--navy); }
.technology .kicker { color: var(--cyan); }
.technology-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 80px; align-items: center; }
.technology-copy h2 { margin-bottom: 28px; }
.technology-copy .section-lead { color: rgba(255,255,255,.6); }
.mode-tabs { display: flex; gap: 5px; width: fit-content; margin-top: 34px; padding: 5px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.035); }
.mode-tabs button { padding: 8px 14px; border: 0; color: rgba(255,255,255,.55); background: transparent; border-radius: 999px; font-size: .78rem; cursor: pointer; }
.mode-tabs button[aria-selected="true"] { color: var(--ink); background: var(--lime); }
.mode-panel { margin-top: 20px; padding: 20px 0 0; border-top: 1px solid var(--line); }
.mode-panel p { margin: 10px 0 0; color: rgba(255,255,255,.57); font-size: .88rem; }
.mode-status { display: inline-flex; align-items: center; gap: 9px; font: .7rem var(--mono); color: var(--white); }
.mode-status i { width: 7px; height: 7px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 5px rgba(55,103,172,.14); }
.rail-map { position: relative; min-height: 540px; overflow: hidden; border: 1px solid rgba(94,144,207,.24); border-radius: 28px; background-color: #081b32; background-image: linear-gradient(rgba(94,144,207,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(94,144,207,.045) 1px, transparent 1px); background-size: 42px 42px; box-shadow: 0 45px 100px rgba(0,0,0,.35); }
.map-topbar { position: absolute; z-index: 2; inset: 0 0 auto; display: flex; justify-content: space-between; padding: 17px 20px; border-bottom: 1px solid var(--line); color: rgba(255,255,255,.35); font: .62rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.map-lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.topology-muted { fill: none; stroke: rgba(94,144,207,.2); stroke-width: 2; }
.active-route { fill: none; stroke: rgba(79,134,217,.28); stroke-width: 18; filter: url(#glow); }
.route-core { fill: none; stroke: var(--lime); stroke-width: 2.5; stroke-dasharray: 9 8; animation: routeFlow 8s linear infinite; }
@keyframes routeFlow { to { stroke-dashoffset: -170; } }
.position-node .node-pulse { fill: rgba(94,144,207,.08); stroke: var(--cyan); animation: pulse 2s ease-out infinite; }
.position-node .node-core { fill: var(--white); stroke: var(--cyan); stroke-width: 4; filter: url(#glow); }
@keyframes pulse { 0% { r: 11px; opacity: 1; } 100% { r: 32px; opacity: 0; } }
.switch-node { fill: rgba(94,144,207,.2); stroke: var(--cyan); stroke-width: 1; }
.map-readout { position: absolute; inset: auto 18px 18px; display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; }
.map-readout div { padding: 13px 14px; background: rgba(5,14,22,.8); border: 1px solid var(--line); border-radius: 10px; backdrop-filter: blur(10px); }
.map-readout span, .map-readout b { display: block; }
.map-readout span { color: var(--muted); font-size: .6rem; }
.map-readout b { margin-top: 4px; color: var(--lime); font: 500 .7rem var(--mono); }
.process { margin-top: 80px; }
.process ol { display: grid; grid-template-columns: repeat(4,1fr); margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.process li { position: relative; display: flex; gap: 17px; align-items: flex-start; padding: 26px 24px 0 0; }
.process li:not(:last-child)::after { content: ""; position: absolute; right: 20px; top: -4px; width: 7px; height: 7px; border-radius: 50%; background: #284260; }
.process li > span { color: var(--cyan); font: .65rem var(--mono); }
.process b, .process small { display: block; }
.process b { font-size: .9rem; }
.process small { margin-top: 3px; color: var(--muted); font-size: .7rem; }

.proof { color: var(--ink); background: #e9eef4; }
.proof-heading > p { color: #53636b; }
.metric-grid { display: grid; grid-template-columns: 1.15fr 1fr 1fr; gap: 14px; }
.metric-card { min-height: 360px; display: flex; flex-direction: column; padding: 30px; border: 1px solid var(--line-dark); border-radius: var(--radius); background: rgba(255,255,255,.6); }
.metric-featured { color: var(--white); background: var(--navy-2); border-color: transparent; }
.metric-label { margin-bottom: auto; color: #617078; font: .69rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.metric-featured .metric-label { color: var(--cyan); }
.metric-value { display: flex; align-items: baseline; margin: 58px 0 16px; line-height: 1; }
.metric-value strong { font-size: clamp(3.5rem, 6vw, 5.9rem); font-weight: 500; letter-spacing: -.07em; }
.metric-value span { margin-left: 6px; color: #789098; font: 500 1rem var(--mono); }
.metric-card > p:nth-of-type(3) { max-width: 300px; margin-bottom: 28px; color: #596a72; font-size: .87rem; }
.metric-featured > p:nth-of-type(3) { color: rgba(255,255,255,.58); }
.metric-rule { height: 3px; margin-top: auto; background: rgba(7,16,25,.1); }
.metric-rule i { display: block; height: 100%; background: var(--cyan-2); }
.mini-track { position: relative; height: 22px; margin-top: auto; }
.mini-track i { position: absolute; top: 10px; left: 0; width: 100%; height: 1px; background: rgba(94,144,207,.38); }
.mini-track b { position: absolute; top: 7px; right: 21%; width: 7px; height: 7px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 12px var(--lime); }
.proof-note { display: flex; align-items: flex-start; gap: 10px; max-width: 850px; margin: 25px 0 0; color: #69777d; font-size: .72rem; }
.proof-note svg { flex: 0 0 18px; width: 18px; margin-top: 1px; fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: round; }

.uses { background: var(--paper); }
.use-list { border-top: 1px solid var(--line-dark); }
.use-list article { display: grid; grid-template-columns: 70px 1fr 50px; gap: 20px; align-items: center; min-height: 150px; border-bottom: 1px solid var(--line-dark); transition: padding .25s, background .25s; }
.use-list article:hover { padding-inline: 20px; background: var(--white); }
.use-number { color: #7f8f96; font: .65rem var(--mono); }
.use-list h3 { margin-bottom: 7px; font-size: 1.35rem; letter-spacing: -.035em; }
.use-list p { max-width: 690px; margin-bottom: 0; color: #66757c; font-size: .9rem; }
.use-arrow { justify-self: end; color: #2b63ad; font-size: 1.4rem; }

.principles { color: var(--white); background: #0d202c; }
.principles-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 100px; }
.principles .kicker { color: var(--cyan); }
.principles-copy > p { max-width: 720px; color: rgba(255,255,255,.66); font-size: 1.1rem; line-height: 1.8; }
.principle-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px 36px; margin-top: 46px; padding-top: 40px; border-top: 1px solid var(--line); }
.principle-grid b, .principle-grid span { display: block; }
.principle-grid b { margin-bottom: 7px; color: var(--lime); font-size: .84rem; }
.principle-grid span { color: rgba(255,255,255,.48); font-size: .78rem; }

.contact { color: var(--white); background: var(--navy); }
.contact-card { position: relative; min-height: 410px; display: grid; grid-template-columns: 1fr auto; gap: 70px; align-items: center; overflow: hidden; padding: 65px 70px; border: 1px solid rgba(79,134,217,.42); border-radius: 30px; background: linear-gradient(135deg, rgba(79,134,217,.15), rgba(157,183,210,.05) 48%, transparent); }
.contact-copy { position: relative; z-index: 2; max-width: 720px; }
.contact .kicker { color: var(--lime); }
.contact h2 { font-size: clamp(2.3rem, 4.7vw, 4.7rem); }
.contact-copy > p:last-child { max-width: 630px; margin: 25px 0 0; color: rgba(255,255,255,.57); }
.button-light { position: relative; z-index: 2; color: var(--ink); background: var(--white); white-space: nowrap; cursor: pointer; }
.contact-route { position: absolute; right: -120px; bottom: -105px; width: 620px; height: 250px; transform: rotate(-11deg); opacity: .55; }
.contact-route i { position: absolute; width: 100%; height: 1px; border-top: 1px dashed var(--cyan); border-radius: 50%; }
.contact-route i:nth-child(1) { top: 10px; }
.contact-route i:nth-child(2) { top: 70px; }
.contact-route i:nth-child(3) { top: 130px; border-color: var(--lime); }

.site-footer { padding: 66px 0 28px; color: rgba(255,255,255,.65); background: #040a0f; }
.footer-main { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 50px; align-items: start; }
.footer-logo-link { width: 180px; display: block; padding: 10px; overflow: hidden; border-radius: 15px; background: white; box-shadow: 0 12px 35px rgba(0,0,0,.22); }
.footer-logo { display: block; width: 100%; height: auto; }
.footer-main > p { margin: 0; font-size: .83rem; }
.footer-meta { justify-self: end; display: flex; flex-direction: column; gap: 8px; text-align: right; font-size: .75rem; }
.footer-meta a { color: var(--cyan); text-underline-offset: 4px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 30px; margin-top: 50px; padding-top: 20px; border-top: 1px solid var(--line); color: rgba(255,255,255,.32); font: .62rem var(--mono); }

[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; transition-delay: var(--delay, 0ms); }
[data-reveal].visible { opacity: 1; transform: none; }
:focus-visible { outline: 2px solid var(--lime); outline-offset: 4px; }

@media (max-width: 1050px) {
  .main-nav { gap: 20px; }
  .hero { height: auto; min-height: 900px; }
  .hero-inner { grid-template-columns: 1fr; padding-top: 145px; padding-bottom: 100px; }
  .signal-card { width: min(520px, 100%); margin: 0 0 0 auto; }
  .technology-layout { grid-template-columns: 1fr; }
  .technology-copy { max-width: 680px; }
  .rail-map { min-height: 500px; }
  .principles-layout { gap: 60px; }
}

@media (max-width: 820px) {
  .shell { width: min(100% - 28px, 680px); }
  .site-header { height: 68px; }
  .menu-toggle { display: flex; }
  .main-nav { position: absolute; inset: 68px 0 auto; height: calc(100vh - 68px); height: calc(100dvh - 68px); display: flex; flex-direction: column; align-items: stretch; gap: 0; padding: 30px 24px; overflow-y: auto; overscroll-behavior: contain; background: #061019; transform: translateX(100%); transition: transform .25s; }
  body.nav-open { overflow: hidden; }
  body.nav-open .main-nav { transform: translateX(0); }
  .main-nav a { padding: 17px 0; border-bottom: 1px solid var(--line); font-size: 1.1rem; }
  .language-switch { align-self: flex-start; margin-top: 20px; }
  .main-nav .language-switch a { min-width: 44px; padding: 8px 12px; border: 0; font-size: .82rem; }
  .main-nav .nav-cta { margin-top: 24px; padding: 13px 20px; text-align: center; border: 0; }
  body.nav-open .menu-toggle span:nth-child(2) { transform: translateY(3.5px) rotate(45deg); }
  body.nav-open .menu-toggle span:nth-child(3) { transform: translateY(-3.5px) rotate(-45deg); }
  .hero { min-height: auto; }
  .hero-media { background-image: linear-gradient(90deg, rgba(6,16,25,.98), rgba(6,16,25,.63)), linear-gradient(0deg, #061019 0%, transparent 45%), url("assets/lokirail-hero.png"); background-position: 62% center; }
  .hero-inner { padding: 125px 0 90px; gap: 55px; }
  .hero h1 { font-size: clamp(3.05rem, 13vw, 5rem); }
  .hero-foot { display: none; }
  .section { padding: 88px 0; }
  .section-heading.two-col, .proof-heading, .principles-layout { grid-template-columns: 1fr; gap: 28px; }
  .section-heading { margin-bottom: 40px; }
  .challenge-grid, .metric-grid { grid-template-columns: 1fr; }
  .challenge-card { min-height: 260px; }
  .metric-card { min-height: 300px; }
  .process ol { grid-template-columns: 1fr 1fr; gap: 30px; }
  .process li:nth-child(2)::after { display: none; }
  .contact-card { grid-template-columns: 1fr; gap: 35px; padding: 48px 34px; }
  .button-light { justify-self: start; }
  .footer-main { grid-template-columns: 1fr; gap: 28px; }
  .footer-meta { justify-self: start; text-align: left; }
}

@media (max-width: 520px) {
  .hero-actions .button { width: 100%; }
  .hero-tags { gap: 12px 18px; }
  .signal-card { padding: 14px; border-radius: 18px; }
  .signal-visual { grid-template-columns: minmax(0,1fr) 22px 86px; min-height: 285px; }
  .sensor-stack > span { grid-template-columns: 40px 1fr; padding: 8px; }
  .sensor-stack small { font-size: .49rem; }
  .sensor-stack > .sensor-optional { grid-template-columns: 40px minmax(0,1fr); }
  .sensor-optional-top { align-items: flex-start; }
  .sensor-optional em { font-size: .46rem; }
  .engine-node { width: 82px; height: 82px; }
  .signal-output { gap: 4px; }
  .signal-output div { padding: 8px 5px; }
  .rail-map { min-height: 430px; }
  .map-topbar span:last-child { display: none; }
  .map-readout { grid-template-columns: 1fr; left: auto; width: 130px; }
  .process ol { grid-template-columns: 1fr; }
  .process li::after { display: none; }
  .use-list article { grid-template-columns: 38px 1fr; padding: 26px 0; }
  .use-arrow { display: none; }
  .use-list article:hover { padding-inline: 12px; }
  .principle-grid { grid-template-columns: 1fr; }
  .contact-card { padding: 42px 24px; }
  .contact .button { width: 100%; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}