:root {
  --bg: #0b1120;
  --bg-2: #0f172a;
  --surface: #131c31;
  --surface-2: #18233c;
  --line: rgba(148, 163, 184, .14);
  --line-2: rgba(148, 163, 184, .24);
  --text: #e6ebf5;
  --muted: #94a3b8;
  --amber: #f59e0b;
  --amber-2: #fbbf24;
  --cyan: #38bdf8;
  --ok: #22c55e;
  --mid: #f59e0b;
  --high: #f97316;
  --vhigh: #ef4444;
  --radius: 18px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--display); line-height: 1.12; letter-spacing: -.022em; margin: 0; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.9rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 650; letter-spacing: -.01em; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--amber-2); outline-offset: 3px; border-radius: 6px; }

.wrap { width: min(1180px, 100% - 32px); margin-inline: auto; }
.narrow { width: min(820px, 100% - 32px); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--amber); color: #111; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
.mono { font-family: var(--mono); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  padding: .85em 1.35em; border-radius: 999px;
  background: linear-gradient(135deg, var(--amber-2), var(--amber));
  color: #1a1203; font-weight: 650; text-decoration: none; white-space: nowrap;
  box-shadow: 0 8px 30px -8px rgba(245, 158, 11, .55), inset 0 1px 0 rgba(255, 255, 255, .35);
  transition: transform .2s ease, box-shadow .2s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 14px 38px -10px rgba(245, 158, 11, .7), inset 0 1px 0 rgba(255, 255, 255, .35); }
.btn-ghost { background: rgba(255, 255, 255, .04); color: var(--text); box-shadow: inset 0 0 0 1px var(--line-2); }
.btn-ghost:hover { background: rgba(255, 255, 255, .08); box-shadow: inset 0 0 0 1px var(--line-2); }
.btn-small { padding: .55em 1em; font-size: .9rem; }
.btn-lg { padding: 1em 1.7em; font-size: 1.05rem; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px);
  background: rgba(11, 17, 32, .72); border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; letter-spacing: -.01em; }
.brand img { border-radius: 8px; }
.brand em { font-style: normal; color: var(--amber); }
.nav nav { margin-left: auto; }
.nav-links { display: flex; gap: 26px; list-style: none; margin: 0; padding: 0; font-size: .93rem; }
.nav-links a { text-decoration: none; color: var(--muted); transition: color .15s; }
.nav-links a:hover { color: var(--text); }

/* Hero */
.hero { position: relative; padding: clamp(48px, 8vw, 96px) 0 clamp(64px, 9vw, 110px); overflow: hidden; }
.glow { position: absolute; border-radius: 50%; pointer-events: none; }
.glow-a { width: 900px; height: 900px; background: radial-gradient(circle, rgba(245, 158, 11, .16), transparent 65%); top: -380px; right: -300px; }
.glow-b { width: 800px; height: 800px; background: radial-gradient(circle, rgba(56, 189, 248, .10), transparent 65%); bottom: -420px; left: -340px; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 75%);
  opacity: .5;
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: .8rem; font-weight: 650; letter-spacing: .12em; text-transform: uppercase; color: var(--amber-2); margin-bottom: 18px; }
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 4px rgba(245, 158, 11, .2); }
h1 { font-size: clamp(2.3rem, 5.2vw, 4rem); font-weight: 750; letter-spacing: -.035em; }
.grad { background: linear-gradient(100deg, var(--amber-2), #fb923c 60%, var(--amber)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { margin-top: 22px; font-size: clamp(1.05rem, 1.5vw, 1.2rem); color: #b8c3d6; max-width: 36em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.ticks { display: flex; flex-wrap: wrap; gap: 8px 22px; list-style: none; padding: 0; margin: 28px 0 0; color: var(--muted); font-size: .92rem; }
.ticks li::before { content: "✓"; color: var(--ok); font-weight: 700; margin-right: 8px; }

.hero-visual { position: relative; display: flex; justify-content: center; }
.phone {
  position: relative; width: min(330px, 82vw); aspect-ratio: 9 / 18.5;
  border-radius: 46px; padding: 12px;
  background: linear-gradient(160deg, #2a3550, #0d1424 40%, #1c2640);
  box-shadow: 0 50px 100px -30px rgba(0, 0, 0, .8), 0 0 0 1px rgba(255, 255, 255, .08), inset 0 0 0 1px rgba(255, 255, 255, .05);
}
.phone canvas { width: 100%; height: 100%; border-radius: 36px; background: #070b14; }
.phone-notch { position: absolute; top: 22px; left: 50%; translate: -50% 0; width: 96px; height: 28px; border-radius: 20px; background: #000; z-index: 3; }
.hud { position: absolute; left: 26px; right: 26px; display: flex; justify-content: space-between; gap: 8px; z-index: 2; pointer-events: none; }
.hud-top { top: 62px; }
.hud-bottom { bottom: 28px; background: rgba(11, 17, 32, .7); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border: 1px solid var(--line-2); border-radius: 18px; padding: 10px 14px; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 5px 11px; border-radius: 999px; font-size: .74rem; font-weight: 650; background: rgba(11, 17, 32, .75); border: 1px solid var(--line-2); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.chip b { font-variant-numeric: tabular-nums; }
.chip-rec i { width: 7px; height: 7px; border-radius: 50%; background: var(--vhigh); animation: blink 1.2s infinite; }
#hud-reba { transition: background .3s, border-color .3s; }
.readout { display: flex; flex-direction: column; line-height: 1.2; }
.readout small { font-size: .62rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.readout b { font-size: .98rem; font-variant-numeric: tabular-nums; }
@keyframes blink { 50% { opacity: .25; } }

.float-card {
  position: absolute; z-index: 4; display: flex; flex-direction: column; gap: 4px;
  padding: 14px 16px; border-radius: 16px; min-width: 190px;
  background: rgba(19, 28, 49, .82); border: 1px solid var(--line-2);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 24px 50px -20px rgba(0, 0, 0, .7);
  animation: float 7s ease-in-out infinite;
}
.float-card small { font-size: .7rem; color: var(--muted); }
.float-card strong { font-size: 1.1rem; }
.fc-1 { top: 16%; left: -6%; }
.fc-2 { bottom: 14%; right: -8%; animation-delay: -3.5s; }
@keyframes float { 50% { transform: translateY(-10px); } }
.pill { display: inline-block; width: fit-content; font-size: .7rem; font-weight: 650; padding: 2px 9px; border-radius: 999px; margin-top: 2px; }
.pill-warn { background: rgba(245, 158, 11, .16); color: var(--amber-2); }
.pill-ok { background: rgba(34, 197, 94, .14); color: #4ade80; }
.demo-note { position: absolute; bottom: -30px; font-size: .72rem; color: var(--muted); letter-spacing: .04em; }

/* Stats band */
.band { border-block: 1px solid var(--line); background: linear-gradient(180deg, rgba(255, 255, 255, .015), transparent); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 30px 22px; display: flex; flex-direction: column; gap: 6px; }
.stat + .stat { border-left: 1px solid var(--line); }
.stat b { font-family: var(--display); font-size: clamp(2rem, 3.6vw, 2.8rem); font-weight: 750; letter-spacing: -.03em; color: #fff; }
.stat span { color: var(--muted); font-size: .92rem; }

/* Sections */
.section { padding: clamp(72px, 10vw, 120px) 0; position: relative; }
.section-alt { background: linear-gradient(180deg, var(--bg-2), var(--bg)); border-block: 1px solid var(--line); }
.section-dark { background: radial-gradient(ellipse 80% 70% at 50% 0%, rgba(245, 158, 11, .09), transparent 70%), #080d19; border-block: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: 52px; }
.sub { margin-top: 18px; color: var(--muted); font-size: 1.08rem; }
.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: start; }
.split-media { align-items: center; }
.prose p + p { margin-top: 16px; }
.prose p { color: #b8c3d6; font-size: 1.06rem; }
.prose h2 { margin-bottom: 20px; }
.prose strong { color: var(--text); }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; list-style: none; padding: 0; margin: 0; }
.card {
  position: relative; padding: 30px 28px; border-radius: var(--radius);
  background: linear-gradient(180deg, var(--surface), rgba(19, 28, 49, .4));
  border: 1px solid var(--line);
  transition: border-color .25s, transform .25s;
}
.card:hover { border-color: rgba(245, 158, 11, .4); transform: translateY(-3px); }
.card p { color: var(--muted); margin-top: 10px; }
.step-n { display: block; font-family: var(--mono); font-size: .85rem; color: var(--amber); margin-bottom: 26px; }
.step-n::after { content: ""; display: block; width: 40px; height: 2px; margin-top: 10px; background: linear-gradient(90deg, var(--amber), transparent); }

/* Methods */
.methods { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.method { padding: 28px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); display: flex; flex-direction: column; gap: 14px; }
.method-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.method h3 { font-size: 1.6rem; font-weight: 750; letter-spacing: -.02em; }
.tag { font-size: .72rem; padding: 4px 10px; border-radius: 999px; background: rgba(56, 189, 248, .12); color: #7dd3fc; font-weight: 600; }
.method p { color: var(--muted); flex: 1; }
.meter { height: 6px; border-radius: 99px; background: rgba(255, 255, 255, .06); overflow: hidden; }
.meter i { display: block; height: 100%; width: var(--w); border-radius: inherit; background: linear-gradient(90deg, var(--ok), var(--amber) 55%, var(--vhigh)); transition: width 1.4s cubic-bezier(.2, .7, .2, 1) .2s; }
.js .method:not(.in) .meter i { width: 0; }
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin: 28px 0 0; padding: 0; list-style: none; border-radius: var(--radius); overflow: hidden; background: var(--line); border: 1px solid var(--line); }
.facts li { background: var(--bg-2); padding: 20px; color: var(--muted); font-size: .92rem; }
.facts b { display: block; color: var(--text); font-size: 1rem; margin-bottom: 4px; }

/* LiDAR */
.lidar-visual { border-radius: 24px; padding: 24px; background: radial-gradient(ellipse at 50% 100%, rgba(245, 158, 11, .1), transparent 60%), var(--surface); border: 1px solid var(--line); }
.lidar-svg .grid path { stroke: rgba(148, 163, 184, .22); fill: none; }
.lidar-svg .shelf { fill: #334155; }
.lidar-svg .shelf-leg { stroke: #334155; stroke-width: 4; }
.lidar-svg .measure line { stroke: var(--amber-2); stroke-width: 1.5; }
.lidar-svg .measure text { fill: var(--amber-2); font: 600 13px var(--font); }
.lidar-svg .ping { fill: var(--cyan); transform-box: fill-box; transform-origin: center; animation: ping 2.4s ease-out infinite; }
.lidar-svg .p2 { animation-delay: .8s; }
.lidar-svg .p3 { animation-delay: 1.6s; }
@keyframes ping { 0% { opacity: 1; transform: scale(.6); } 70% { opacity: .15; transform: scale(2.2); } 100% { opacity: 0; transform: scale(2.4); } }

/* Bento */
.bento { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.tile { padding: 28px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); position: relative; overflow: hidden; }
.tile p { color: var(--muted); margin-top: 10px; }
.tile-wide { grid-column: span 2; display: flex; flex-direction: column; background: radial-gradient(ellipse at 100% 0%, rgba(245, 158, 11, .12), transparent 55%), var(--surface); }
.tile-wide h3 { font-size: 1.5rem; }
.tile-icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: rgba(245, 158, 11, .12); margin-bottom: 18px; }
.tile-icon svg { width: 22px; height: 22px; fill: none; stroke: var(--amber-2); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.spark { margin-top: auto; padding-top: 28px; }
.spark svg { width: 100%; height: 90px; }
.spark path { fill: none; stroke: var(--amber); stroke-width: 2; stroke-dasharray: 1; transition: stroke-dashoffset 2s ease .3s; }
.spark path { stroke-dashoffset: 0; }
.js .tile-wide:not(.in) .spark path { stroke-dashoffset: 1; }

/* Chain */
.chain { display: flex; align-items: stretch; gap: 0; overflow-x: auto; padding: 8px 2px 18px; scrollbar-width: thin; }
.block { flex: 1 0 200px; display: flex; flex-direction: column; gap: 6px; padding: 18px; border-radius: 16px; background: var(--surface); border: 1px solid var(--line-2); position: relative; }
.block small { font-family: var(--mono); color: var(--amber); font-size: .78rem; }
.block b { font-size: 1rem; }
.block code { font-family: var(--mono); font-size: .74rem; color: var(--muted); }
.block-live { border-color: rgba(34, 197, 94, .5); box-shadow: 0 0 0 4px rgba(34, 197, 94, .08), 0 20px 50px -20px rgba(34, 197, 94, .35); }
.seal { position: absolute; top: 14px; right: 14px; font-size: .7rem; font-weight: 650; color: #4ade80; }
.link { flex: 0 0 34px; align-self: center; height: 2px; background: repeating-linear-gradient(90deg, var(--amber) 0 6px, transparent 6px 10px); background-size: 20px 2px; animation: flow 1s linear infinite; }
@keyframes flow { to { background-position: 20px 0; } }
.three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 44px; }
.three p { color: var(--muted); margin-top: 8px; }

/* Privacy */
.checklist { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.checklist li { position: relative; padding: 16px 18px 16px 52px; border-radius: 14px; background: var(--surface); border: 1px solid var(--line); color: var(--muted); }
.checklist li::before { content: ""; position: absolute; left: 18px; top: 19px; width: 20px; height: 20px; border-radius: 50%; background: rgba(34, 197, 94, .15) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-7' fill='none' stroke='%234ade80' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 20px no-repeat; }
.checklist b { color: var(--text); }

/* Server */
.server-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.panel-mock { border-radius: 18px; overflow: hidden; border: 1px solid var(--line-2); background: #0c1322; box-shadow: 0 40px 80px -30px rgba(0, 0, 0, .7); }
.pm-bar { display: flex; align-items: center; gap: 6px; padding: 12px 14px; border-bottom: 1px solid var(--line); background: var(--surface); }
.pm-bar i { width: 10px; height: 10px; border-radius: 50%; background: #334155; }
.pm-bar span { margin-left: 10px; font-size: .78rem; color: var(--muted); }
.pm-body { padding: 18px; display: grid; gap: 16px; }
.pm-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.pm-kpis div { padding: 12px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); }
.pm-kpis small { display: block; font-size: .7rem; color: var(--muted); }
.pm-kpis b { font-size: 1.4rem; }
.pm-kpis .warn { color: var(--high); }
.pm-chart { display: flex; align-items: flex-end; gap: 8px; height: 110px; padding: 12px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); }
.pm-chart i { flex: 1; height: var(--h); border-radius: 4px 4px 2px 2px; background: linear-gradient(180deg, var(--amber-2), rgba(245, 158, 11, .25)); transition: height 1.2s cubic-bezier(.2, .7, .2, 1); }
.js .panel-mock:not(.in) .pm-chart i { height: 8%; }
.pm-rows { display: grid; gap: 8px; }
.pm-rows div { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 10px 12px; border-radius: 10px; background: var(--surface); border: 1px solid var(--line); font-size: .84rem; }
.pm-rows em { font-style: normal; font-size: .74rem; font-weight: 650; padding: 2px 9px; border-radius: 999px; white-space: nowrap; }
.r-high { background: rgba(249, 115, 22, .16); color: #fdba74; }
.r-mid { background: rgba(245, 158, 11, .16); color: var(--amber-2); }
.r-low { background: rgba(34, 197, 94, .14); color: #4ade80; }
.feature-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.feature-list li { padding-left: 20px; border-left: 2px solid rgba(245, 158, 11, .5); color: var(--muted); }
.feature-list b { color: var(--text); }

/* Audience + plans */
.audience { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 48px; }
.audience span { padding: 9px 16px; border-radius: 999px; border: 1px solid var(--line-2); background: rgba(255, 255, 255, .02); font-size: .92rem; }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.plan { position: relative; padding: 32px 28px; border-radius: 22px; background: var(--surface); border: 1px solid var(--line); }
.plan h3 { font-size: 1.35rem; }
.plan-price { margin-top: 6px; color: var(--amber-2); font-weight: 600; }
.plan ul { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 10px; color: var(--muted); }
.plan li { display: flex; gap: 10px; }
.plan li::before { content: "—"; color: var(--amber); }
.plan-pro { background: linear-gradient(180deg, rgba(245, 158, 11, .1), var(--surface) 60%); border-color: rgba(245, 158, 11, .45); box-shadow: 0 30px 70px -30px rgba(245, 158, 11, .35); }
.badge { position: absolute; top: -12px; left: 28px; padding: 3px 12px; border-radius: 999px; font-size: .74rem; font-weight: 700; background: var(--amber); color: #1a1203; }

/* FAQ */
.faq { display: grid; gap: 12px; }
.faq details { border-radius: 14px; background: var(--surface); border: 1px solid var(--line); padding: 4px 20px; transition: border-color .2s; }
.faq details[open] { border-color: rgba(245, 158, 11, .35); }
.faq summary { cursor: pointer; list-style: none; padding: 16px 28px 16px 0; font-weight: 600; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 50%; translate: 0 -50%; font-size: 1.4rem; color: var(--amber); transition: rotate .2s; }
.faq details[open] summary::after { rotate: 45deg; }
.faq details p { color: var(--muted); padding-bottom: 18px; }

/* CTA + footer */
.cta { padding: clamp(80px, 10vw, 120px) 0; text-align: center; background: radial-gradient(ellipse 60% 80% at 50% 100%, rgba(245, 158, 11, .16), transparent 70%); }
.cta-inner { display: flex; flex-direction: column; align-items: center; gap: 18px; }
.cta p { color: var(--muted); font-size: 1.1rem; max-width: 34em; margin-bottom: 12px; }
.footer { border-top: 1px solid var(--line); padding: 40px 0 48px; }
.footer-inner { display: grid; grid-template-columns: auto 1fr auto; gap: 16px 32px; align-items: center; }
.disclaimer { color: var(--muted); font-size: .86rem; }
.footer-links { display: flex; gap: 20px; font-size: .9rem; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--text); }
.small { grid-column: 1 / -1; color: #64748b; font-size: .8rem; }

/* Reveal */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s cubic-bezier(.2, .7, .2, 1); }
.js .reveal.in { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 980px) {
  .hero-grid, .split, .server-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { margin-top: 10px; }
  .fc-1 { left: 0; }
  .fc-2 { right: 0; }
  .methods, .steps, .three, .plans { grid-template-columns: 1fr; }
  .bento { grid-template-columns: 1fr 1fr; }
  .tile-wide { grid-column: 1 / -1; }
  .facts { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(3) { border-left: 0; }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--line); }
}
@media (max-width: 760px) {
  .nav nav { display: none; }
  .nav .btn-small { margin-left: auto; }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .bento, .facts { grid-template-columns: 1fr; }
  .float-card { position: static; min-width: 0; animation: none; }
  .hero-visual { flex-direction: column; align-items: center; gap: 14px; }
  .demo-note { position: static; }
  .chain { flex-direction: column; }
  .link { width: 2px; height: 26px; flex-basis: 26px; background: repeating-linear-gradient(180deg, var(--amber) 0 6px, transparent 6px 10px); animation: none; }
  .block { flex-basis: auto; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}