/* ABOUTME: V2 design system for rayze.xyz — Geist type, Space Grotesk wordmark, icon rows, layered diagrams. */
/* ABOUTME: Dark/light themeable via data-theme on <html>; mint accent + glow; hairline line separators; no photography. */

/* ============================================================= Tokens */
:root {
  --fs-hero:    clamp(2.75rem, 6.4vw, 5.625rem);
  --fs-display: clamp(2.5rem, 5.2vw, 4rem);
  --fs-h2:      clamp(1.75rem, 1.4rem + 1.4vw, 2.5rem);
  --fs-h3:      clamp(1.375rem, 1rem + 1vw, 1.75rem);
  --fs-lead:    clamp(1.125rem, .9rem + .9vw, 1.375rem);
  --fs-body:    1.0625rem;
  --fs-small:   1rem;
  --fs-label:   0.875rem;

  --tracking-tight:   -0.03em;
  --tracking-tighter: -0.04em;
  --tracking-wide:     0.14em;

  --lh-tight: 1.06;
  --lh-head:  1.12;
  --lh-body:  1.6;

  --container: 1280px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --section-y: clamp(5rem, 11vh, 9.5rem);
  --radius: 14px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: dark;
}

/* Dark (default) */
:root, [data-theme="dark"] {
  --bg: #000000;
  --bg-elevated: #0B0F0E;
  --bg-soft: #0E1413;
  --mint: #08FFB5;
  --mint-ink: #04140F;
  --mint-dim: rgba(8, 255, 181, 0.12);
  --mint-glow: rgba(8, 255, 181, 0.55);
  --text: #FFFFFF;
  --text-muted: #9AA5A1;
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(255, 255, 255, 0.22);
}
/* Light — cream */
[data-theme="light"] {
  color-scheme: light;
  --bg: #F4F3ED;
  --bg-elevated: #FFFFFF;
  --bg-soft: #ECEBE3;
  --mint: #03B37E;
  --mint-ink: #FFFFFF;
  --mint-dim: rgba(3, 179, 126, 0.12);
  --mint-glow: rgba(3, 179, 126, 0.45);
  --text: #0B0F0E;
  --text-muted: #55605C;
  --line: rgba(0, 0, 0, 0.14);
  --line-strong: rgba(0, 0, 0, 0.26);
}

/* ============================================================= Reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Geist", system-ui, -apple-system, sans-serif;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .4s var(--ease), color .4s var(--ease);
}
svg { display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; }
h1, h2, h3, h4 { font-weight: 500; line-height: var(--lh-head); letter-spacing: var(--tracking-tight); }

/* ============================================================= Layout */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section-y); }
.section--tight { padding-block: clamp(3rem, 7vh, 6rem); }
.divider { border: 0; border-top: 1px solid var(--line); }
main { display: block; }

/* ============================================================= Type helpers */
.eyebrow {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-muted);
}
.eyebrow--mint { color: var(--mint); }
.hero-title { font-size: var(--fs-hero); letter-spacing: var(--tracking-tighter); line-height: var(--lh-tight); font-weight: 500; }
.display { font-size: var(--fs-display); letter-spacing: var(--tracking-tighter); line-height: var(--lh-tight); }
.h2 { font-size: var(--fs-h2); }
.h3 { font-size: var(--fs-h3); }
.lead { font-size: var(--fs-lead); color: var(--text-muted); line-height: 1.5; letter-spacing: var(--tracking-tight); font-weight: 400; }
.muted { color: var(--text-muted); }
.mint { color: var(--mint); }
.measure { max-width: 62ch; }
.measure-sm { max-width: 46ch; }

/* ============================================================= Buttons (all glow) */
.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  padding: .6rem 1.1rem; border-radius: 100px; font-size: var(--fs-small); line-height: 1.2; white-space: nowrap;
  font-size: var(--fs-small); font-weight: 500; letter-spacing: -0.01em;
  border: 1px solid transparent; transition: all .25s var(--ease); white-space: nowrap;
  box-shadow: 0 0 22px -8px var(--mint-glow);
}
.btn svg { width: 1.05em; height: 1.05em; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 34px -6px var(--mint-glow); }
.btn--primary { background: var(--mint); color: var(--mint-ink); }
.btn--ghost { border-color: var(--line-strong); color: var(--text); }
.btn--ghost:hover { border-color: var(--mint); }
.btn--lg { padding: .7rem 1.3rem; font-size: var(--fs-small); }

.link-arrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: var(--fs-small); font-weight: 500; color: var(--text);
  border-bottom: 1px solid var(--line-strong); padding-bottom: 3px; transition: all .2s var(--ease);
}
.link-arrow:hover { color: var(--mint); border-color: var(--mint); gap: .8rem; }

/* ============================================================= Header / nav */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 104px; }
.logo { display: inline-flex; align-items: center; gap: 16px; }
.logo-mark { width: 72px; height: 50px; display: block; flex: none; overflow: visible; }
.logo-mark .lm-brk { stroke: color-mix(in srgb, var(--text) 45%, transparent); }
.logo-mark .lm-r { stroke: var(--text); }
.logo-mark .lm-sl { stroke: var(--mint); }
.logo-ascii {
  font-family: "Geist Mono", ui-monospace, monospace; font-weight: 600;
  font-size: 2rem; letter-spacing: -0.06em; line-height: 1;
  color: var(--text); display: inline-flex; align-items: baseline; flex: none;
}
.logo-ascii .la-sym { color: var(--mint); }
.footer-brand .logo-ascii { font-size: 1.5rem; }
.logo-word {
  font-family: "Space Grotesk", "Geist", sans-serif;
  font-size: 2.7rem; font-weight: 600; letter-spacing: -0.025em; color: var(--text); line-height: 1;
}
.nav-links { display: flex; align-items: center; gap: clamp(1.25rem, 2.6vw, 2.4rem); }
.nav-links a { font-size: var(--fs-small); color: var(--text-muted); transition: color .2s var(--ease); }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 1rem; }
.nav-item { position: relative; display: flex; align-items: center; }
.nav-item > a { display: inline-flex; align-items: center; gap: .3rem; }
.nav-caret { width: 14px; height: 14px; transition: transform .2s var(--ease); }
.has-sub:hover .nav-caret, .has-sub:focus-within .nav-caret { transform: rotate(180deg); }
.sub-menu {
  position: absolute; top: calc(100% + 14px); left: 50%; transform: translate(-50%, -6px);
  min-width: 200px; padding: .5rem; display: grid; gap: 2px;
  background: var(--bg-elevated); border: 1px solid var(--line-strong); border-radius: 10px;
  box-shadow: 0 18px 40px -18px rgba(0, 0, 0, .8);
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .18s var(--ease), transform .18s var(--ease), visibility 0s linear .18s;
}
.sub-menu::before { content: ""; position: absolute; left: 0; right: 0; top: -14px; height: 14px; }
.has-sub:hover .sub-menu, .has-sub:focus-within .sub-menu {
  opacity: 1; visibility: visible; pointer-events: auto; transform: translate(-50%, 0); transition-delay: 0s;
}
.sub-menu a { display: block; padding: .6rem .85rem; border-radius: 6px; font-size: var(--fs-small); color: var(--text-muted); white-space: nowrap; }
.sub-menu a:hover, .sub-menu a:focus-visible { color: var(--text); background: color-mix(in srgb, var(--mint) 12%, transparent); }

.theme-toggle {
  width: 38px; height: 38px; border-radius: 100px; border: 1px solid var(--line-strong);
  display: inline-grid; place-items: center; color: var(--text-muted); transition: all .2s var(--ease);
}
.theme-toggle:hover { color: var(--text); border-color: var(--text); }
.theme-toggle svg { width: 19px; height: 19px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }
.nav-toggle { display: none; }
.nav-cta-mobile { display: none; }

/* ============================================================= Hero (typographic, no photos) */
.hero { position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, #000 55%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 55%, transparent 100%);
  background:
    radial-gradient(50% 60% at 15% 62%, var(--mint-dim), transparent 65%),
    radial-gradient(45% 50% at 100% 0%, var(--mint-dim), transparent 60%);
}
.hero-inner { position: relative; z-index: 1; padding-block: clamp(5.5rem, 17vh, 11rem) var(--section-y); }
.hero .eyebrow { margin-bottom: 1.6rem; }
.hero-title { max-width: 17ch; }
.hero-sub { margin-top: 1.8rem; max-width: 52ch; }
.hero-inner:not(:has(.hero-cta)) { padding-block: clamp(5.5rem, 17vh, 11rem) clamp(4.5rem, 13vh, 8.5rem); }
.hero-cta { margin-top: 2.6rem; display: flex; flex-wrap: wrap; gap: .9rem; }

/* ============================================================= Section header */
.sec-head { display: grid; gap: 1.1rem; max-width: 72ch; margin-bottom: clamp(2.5rem, 5vw, 4rem); }

/* ============================================================= Function list (icon + text, line-divided) */
.flist { display: grid; }
.fitem {
  display: grid; grid-template-columns: auto minmax(0,1fr); gap: clamp(1.25rem, 4vw, 3rem);
  padding-block: clamp(2rem, 5vh, 3.25rem); border-top: 1px solid var(--line); align-items: start;
}
.flist .fitem:last-child { border-bottom: 1px solid var(--line); }
.ficon {
  width: 56px; height: 56px; border-radius: 12px; border: 1px solid var(--line-strong);
  display: grid; place-items: center; color: var(--mint); background: var(--mint-dim);
}
.ficon svg { width: 26px; height: 26px; }
.fitem-label { font-family: "Geist Mono", monospace; font-size: var(--fs-label);
  letter-spacing: var(--tracking-wide); text-transform: uppercase; color: var(--mint); margin-bottom: .7rem; }
.fitem h3 { font-size: var(--fs-h3); margin-bottom: .7rem; }
.fitem p { color: var(--text-muted); max-width: 64ch; }

/* ============================================================= Steps / How we partner */
.step {
  display: grid; grid-template-columns: auto minmax(0,1fr); gap: clamp(1.2rem,4vw,3.5rem);
  padding-block: clamp(2rem, 5vh, 3.5rem); border-top: 1px solid var(--line); align-items: baseline;
}
.steps .step:last-child { border-bottom: 1px solid var(--line); }
.step-num { font-family: "Geist Mono", monospace; font-size: var(--fs-small); color: var(--text-muted); padding-top: .5rem; }
.step-metric { font-size: var(--fs-h2); letter-spacing: var(--tracking-tight); line-height: 1.1; }
.step-metric b { color: var(--mint); font-weight: 500; }
.step-desc { margin-top: .8rem; max-width: 48ch; color: var(--text-muted); }

/* ============================================================= Cards */
.grid { display: grid; gap: 1.25rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--bg-elevated); border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(1.6rem, 3vw, 2.2rem); transition: border-color .25s var(--ease), transform .25s var(--ease);
}
.card:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.card-icon { width: 46px; height: 46px; border-radius: 11px; display: grid; place-items: center;
  background: var(--mint-dim); color: var(--mint); margin-bottom: 1.3rem; }
.card-icon svg { width: 23px; height: 23px; }
.card h3 { font-size: 1.25rem; margin-bottom: .6rem; }
.card p { color: var(--text-muted); font-size: var(--fs-small); }

/* Stat bar */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.stat { background: var(--bg); padding: clamp(1.5rem, 3vw, 2.3rem); }
.stat-num { font-size: clamp(1.9rem, 3.5vw, 2.85rem); letter-spacing: var(--tracking-tight); line-height: 1; }
.stat-num b { color: var(--mint); font-weight: 500; }
.stat-label { margin-top: .6rem; font-size: var(--fs-small); color: var(--text-muted); }

/* Industries (stacked cards with arrow) */
.industries { display: grid; }
.ind {
  display: grid; grid-template-columns: auto minmax(0,1fr) auto; gap: clamp(1.25rem, 3vw, 2rem); align-items: center;
  padding-block: clamp(1.9rem, 4.5vh, 3rem); border-top: 1px solid var(--line);
  transition: padding-left .25s var(--ease), background-color .25s var(--ease);
}
.industries .ind:last-child { border-bottom: 1px solid var(--line); }
.ind:hover { padding-left: .7rem; }
.ind h3 { font-size: var(--fs-h3); margin-bottom: .55rem; letter-spacing: var(--tracking-tight); }
.ind p { color: var(--text-muted); max-width: 62ch; }
.ind-arrow { width: 48px; height: 48px; border-radius: 100px; border: 1px solid var(--line-strong);
  display: grid; place-items: center; color: var(--text); transition: all .25s var(--ease); }
.ind-arrow svg { width: 20px; height: 20px; }
.ind:hover .ind-arrow { background: var(--mint); color: var(--mint-ink); border-color: var(--mint); box-shadow: 0 0 26px -6px var(--mint-glow); }

/* Chips */
.chips { display: flex; flex-wrap: wrap; gap: .55rem; }
.chip { font-family: "Geist Mono", monospace; font-size: .85rem; letter-spacing: -0.01em;
  padding: .45rem .85rem; border: 1px solid var(--line-strong); border-radius: 100px; color: var(--text-muted); }

/* ============================================================= Layered stack diagram (Atlas-style) */
.layers { display: grid; gap: .6rem; }
.layer {
  border: 1px solid var(--line-strong); border-radius: 12px; padding: 1.1rem 1.4rem;
  background: var(--bg-elevated); display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.layer:hover { border-color: var(--mint); box-shadow: 0 0 30px -12px var(--mint-glow); }
.layer-name { font-weight: 500; letter-spacing: -0.01em; }
.layer-name span { display: block; font-size: .85rem; color: var(--text-muted); font-weight: 400; margin-top: .2rem; }
.layer-tag { font-family: "Geist Mono", monospace; font-size: .75rem; letter-spacing: var(--tracking-wide);
  text-transform: uppercase; color: var(--mint); white-space: nowrap; }
.layer--accent { border-color: var(--mint); background: var(--mint-dim); }

/* ============================================================= Numbered principle list */
.principle { display: grid; grid-template-columns: auto 1fr; gap: clamp(1rem,3vw,2.5rem);
  padding-block: clamp(1.7rem, 4vh, 2.7rem); border-top: 1px solid var(--line); align-items: start; }
.principles .principle:last-child { border-bottom: 1px solid var(--line); }
.principle-k { font-family: "Geist Mono", monospace; font-size: var(--fs-small); color: var(--mint); padding-top: .35rem; }
.principle h3 { font-size: var(--fs-h3); margin-bottom: .6rem; }
.principle p { color: var(--text-muted); max-width: 60ch; }

/* ============================================================= Case-study card */
.case { display: flex; flex-direction: column; }
.case h3 { font-size: var(--fs-h3); margin: .8rem 0 .7rem; }
.case > p { color: var(--text-muted); font-size: var(--fs-small); }
.case-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
  margin-top: auto; padding-top: 1.6rem; border-top: 1px solid var(--line); }
.metric-num { font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: var(--tracking-tight); line-height: 1; color: var(--mint); }
.metric-label { margin-top: .4rem; font-size: .85rem; color: var(--text-muted); }

/* ============================================================= CTA band */
.cta-band { text-align: center; }
.cta-band .display { max-width: 20ch; margin-inline: auto; }
.cta-band .btn { margin-top: 2.2rem; }

/* ============================================================= Footer */
.site-footer { border-top: 1px solid var(--line); padding-block: clamp(3rem, 6vh, 5rem) 2.5rem; }
.footer-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2rem; }
.footer-brand { max-width: 30ch; }
.footer-brand .logo { margin-bottom: 1rem; }
.footer-brand p { color: var(--text-muted); font-size: var(--fs-small); }
.footer-cols { display: flex; gap: clamp(2rem, 6vw, 5rem); flex-wrap: wrap; }
.footer-col h4 { font-family: "Geist Mono", monospace; font-size: var(--fs-label); letter-spacing: var(--tracking-wide);
  text-transform: uppercase; color: var(--text-muted); margin-bottom: 1rem; font-weight: 500; }
.footer-col a { display: block; font-size: var(--fs-small); color: var(--text-muted); padding-block: .35rem; transition: color .2s; }
.footer-col a:hover { color: var(--text); }
.footer-social { display: flex; gap: 1rem; }
.footer-social a { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 8px;
  display: grid; place-items: center; color: var(--text-muted); transition: all .2s; }
.footer-social a:hover { color: var(--text); border-color: var(--line-strong); }
.footer-social svg { width: 18px; height: 18px; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem;
  margin-top: clamp(2.5rem, 5vh, 4rem); padding-top: 1.6rem; border-top: 1px solid var(--line);
  font-size: var(--fs-small); color: var(--text-muted); }
.footer-bottom a:hover { color: var(--text); }

/* ============================================================= Reveal motion */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }

/* ============================================================= Responsive */
@media (max-width: 860px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .step, .fitem { grid-template-columns: 1fr; gap: .6rem; }
  .step-num { padding-top: 0; }
  .nav { height: 76px; }
  .logo { gap: 10px; }
  .logo-ascii { font-size: 1.35rem; }
  .logo-word { font-size: 1.8rem; }
  .nav-actions { gap: .6rem; }
  .nav-actions .btn { padding: .55rem .95rem; font-size: .82rem; }
  .nav-links { display: none; }
  .nav-toggle { display: inline-grid; place-items: center; width: 38px; height: 38px;
    border: 1px solid var(--line-strong); border-radius: 100px; color: var(--text); }
  .nav-toggle svg { width: 19px; height: 19px; }
  .nav-links.open {
    display: flex; position: absolute; left: 0; right: 0; top: 76px; flex-direction: column;
    align-items: flex-start; gap: .3rem; padding: 1.2rem var(--gutter) 1.8rem;
    background: var(--bg); border-bottom: 1px solid var(--line); }
  .nav-links.open a { font-size: 1.15rem; padding-block: .5rem; }
  .nav-links.open .nav-cta-mobile { display: inline-flex; margin-top: .6rem; color: var(--mint); }
  .nav-links.open .nav-item { flex-direction: column; align-items: flex-start; width: 100%; }
  .nav-links.open .nav-caret { display: none; }
  .nav-links.open .sub-menu { position: static; transform: none; opacity: 1; visibility: visible; pointer-events: auto;
    border: 0; box-shadow: none; background: transparent; padding: 0 0 .4rem 1rem; min-width: 0; }
  .nav-links.open .sub-menu a { font-size: 1rem; padding: .35rem 0; color: var(--text-muted); }
}
@media (max-width: 560px) {
  .nav-actions > .btn { display: none; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
}

/* ============================================================= Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .btn:hover { transform: none; }
}

/* ============================================================= Hero motion canvas */
.hero-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%; display: block; z-index: 0; pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, #000 55%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 55%, transparent 100%);
}

/* ============================================================= Industry row icon */
.ind-icon {
  width: 54px; height: 54px; border-radius: 13px; flex: none;
  border: 1px solid var(--line-strong); background: var(--mint-dim);
  display: grid; place-items: center; color: var(--mint);
  transition: border-color .25s var(--ease), background-color .25s var(--ease);
}
.ind-icon svg { width: 26px; height: 26px; }
.ind:hover .ind-icon { border-color: var(--mint); }
@media (max-width: 560px) {
  .ind { grid-template-columns: minmax(0,1fr) auto; }
  .ind-icon { display: none; }
}

/* ============================================================= Sigma block (two-up: copy + layer stack) */
.sigma-block {
  display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  gap: clamp(2.5rem, 6vw, 6rem); align-items: center;
}
.sigma-copy .lead { max-width: 40ch; }
@media (max-width: 960px) {
  .sigma-block { grid-template-columns: 1fr; gap: clamp(2.5rem, 6vw, 4rem); }
  .sigma-copy .lead { max-width: 56ch; }
}

/* ============================================================= Sigma emblem (landing) */
.sigma-emblem { display: grid; place-items: center; }
.sigma-emblem svg { width: min(100%, 430px); height: auto; overflow: visible; display: block; }
.sg-axis { stroke: var(--line); stroke-width: 1; stroke-dasharray: 3 7; }
.sg-plate path { fill: none; stroke: var(--line-strong); stroke-width: 1.6; }
.sg-plate {
  animation: sgfloat 9s var(--ease) infinite;
  animation-delay: calc(var(--i) * -1.15s);
  transform-origin: 200px 200px;
}
.sg-plate--accent path { stroke: var(--mint); fill: var(--mint-dim); }
.sg-inner { stroke: var(--mint); stroke-width: 1.4; fill: none; opacity: .7; }
.sg-pulse path { fill: var(--mint); }
.sg-pulse { animation: sgrise 5.4s linear infinite; }
@keyframes sgfloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
@keyframes sgrise {
  0% { transform: translateY(0); opacity: 0; }
  10% { opacity: 1; }
  86% { opacity: 1; }
  100% { transform: translateY(-216px); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .sg-plate, .sg-pulse { animation: none !important; }
  .sg-pulse { opacity: 1; }
}

/* ============================================================= Sigma block diagram */
.sig { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(260px, .85fr); gap: clamp(2rem, 4vw, 3.5rem); align-items: center; }
.sig-frame {
  position: relative; padding: clamp(2.6rem, 5vw, 3.6rem) clamp(1.4rem, 3vw, 2.4rem) clamp(1.4rem, 3vw, 2.4rem);
  border: 1px solid var(--line-strong); border-radius: 18px;
  background:
    radial-gradient(60% 55% at 15% 100%, var(--mint-dim), transparent 65%),
    radial-gradient(50% 45% at 100% 0%, var(--mint-dim), transparent 60%),
    var(--bg-elevated);
  box-shadow: 0 24px 60px -34px rgba(0,0,0,.85);
}
.blk {
  appearance: none; font: inherit; cursor: default; width: 100%; text-align: left;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  min-height: 78px; padding: .85rem clamp(.9rem, 2vw, 1.3rem);
  border: 1px solid var(--line-strong); border-radius: 8px;
  background: color-mix(in srgb, var(--bg) 55%, transparent);
  color: var(--text-muted); font-size: 1.05rem; letter-spacing: -0.01em;
  transition: background-color .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.blk:hover, .blk:focus-visible {
  color: var(--text); border-color: var(--mint);
  background: color-mix(in srgb, var(--mint) 18%, var(--bg-elevated));
  box-shadow: 0 0 40px -14px var(--mint-glow), inset 0 1px 0 color-mix(in srgb, var(--mint) 40%, transparent);
}
.blk:focus-visible { outline: 2px solid var(--mint); outline-offset: 2px; }
.blk-txt { display: grid; gap: .28rem; min-width: 0; }
.blk-name { font-size: 1.02rem; letter-spacing: -0.01em; color: inherit; }
.blk-sub { font-family: "Geist Mono", monospace; font-size: .69rem; line-height: 1.5; letter-spacing: .01em;
  color: color-mix(in srgb, var(--text-muted) 88%, transparent); text-wrap: pretty; }
.blk-tag { flex: none; font-family: "Geist Mono", monospace; font-size: .62rem; font-weight: 500;
  letter-spacing: var(--tracking-wide); text-transform: uppercase;
  color: var(--text-muted); opacity: .75; transition: color .22s var(--ease), opacity .22s var(--ease); }
.blk:hover .blk-tag, .blk:focus-visible .blk-tag { color: var(--mint); opacity: 1; }
.sig-three .blk { flex-direction: column; align-items: flex-start; justify-content: flex-start; gap: .5rem; }
.sig-three .blk-tag { order: -1; }
.sig-pill {
  position: absolute; top: 0; left: 50%; transform: translate(-50%, -50%);
  width: auto; min-height: 0; padding: .55rem 1.25rem; border-radius: 100px;
  background: var(--bg); color: var(--text); font-size: .92rem; font-weight: 500;
  border-color: var(--line-strong); white-space: nowrap; max-width: none;
}
.sig-pill:hover, .sig-pill:focus-visible { background: var(--bg); color: var(--mint); box-shadow: 0 0 34px -12px var(--mint-glow); }
.sig-rows { display: grid; gap: clamp(.6rem, 1.2vw, .85rem); }
.sig-three { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(.6rem, 1.2vw, .85rem); }
/* the semantic layer reads as the anchor until something else is hovered */
.sig:not(:has(.blk:hover)):not(:has(.blk:focus-visible)) .blk[data-k="sem"] .blk-tag { color: var(--mint); opacity: 1; }
.sig:not(:has(.blk:hover)):not(:has(.blk:focus-visible)) .blk[data-k="sem"] {
  color: var(--text); border-color: var(--mint);
  background: color-mix(in srgb, var(--mint) 18%, var(--bg-elevated));
  box-shadow: 0 0 40px -14px var(--mint-glow), inset 0 1px 0 color-mix(in srgb, var(--mint) 40%, transparent);
}
.sig-detail { min-height: 12rem; }
.sig-d { display: none; }
.sig:not(:has(.blk:hover)):not(:has(.blk:focus-visible)) .sig-d[data-k="sem"] { display: block; }
.sig:has(.blk[data-k="gov"]:hover) .sig-d[data-k="gov"],
.sig:has(.blk[data-k="gov"]:focus-visible) .sig-d[data-k="gov"] { display: block; }
.sig:has(.blk[data-k="chan"]:hover) .sig-d[data-k="chan"],
.sig:has(.blk[data-k="chan"]:focus-visible) .sig-d[data-k="chan"] { display: block; }
.sig:has(.blk[data-k="agent"]:hover) .sig-d[data-k="agent"],
.sig:has(.blk[data-k="agent"]:focus-visible) .sig-d[data-k="agent"] { display: block; }
.sig:has(.blk[data-k="sem"]:hover) .sig-d[data-k="sem"],
.sig:has(.blk[data-k="sem"]:focus-visible) .sig-d[data-k="sem"] { display: block; }
.sig:has(.blk[data-k="ctx"]:hover) .sig-d[data-k="ctx"],
.sig:has(.blk[data-k="ctx"]:focus-visible) .sig-d[data-k="ctx"] { display: block; }
.sig:has(.blk[data-k="model"]:hover) .sig-d[data-k="model"],
.sig:has(.blk[data-k="model"]:focus-visible) .sig-d[data-k="model"] { display: block; }
.sig:has(.blk[data-k="integ"]:hover) .sig-d[data-k="integ"],
.sig:has(.blk[data-k="integ"]:focus-visible) .sig-d[data-k="integ"] { display: block; }
.sig-d-kicker { font-family: "Geist Mono", monospace; font-size: .72rem; font-weight: 500; letter-spacing: var(--tracking-wide);
  text-transform: uppercase; color: var(--mint); margin: 0 0 .7rem; }
.sig-d h3 { font-size: var(--fs-h3); letter-spacing: var(--tracking-tight); margin: 0 0 .8rem; }
.sig-d p:last-child { color: var(--text-muted); margin: 0; text-wrap: pretty; }
.sig-d em { font-family: "Geist Mono", monospace; font-style: normal; color: var(--text); font-size: .85em; }
@media (max-width: 860px) {
  .sig { grid-template-columns: 1fr; }
  .sig-detail { min-height: 0; }
  .blk { min-height: 68px; }
}
@media (max-width: 520px) {
  .sig-three { grid-template-columns: 1fr; }
  .sig-pill { font-size: .8rem; padding: .45rem 1rem; }
}
@media (prefers-reduced-motion: reduce) { .blk { transition: none; } }

/* ============================================================= Industry pages */
.subnav { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: clamp(2rem, 4vh, 3rem); }
.subnav a { font-family: "Geist Mono", monospace; font-size: .78rem; letter-spacing: .02em; padding: .5rem .95rem; white-space: nowrap;
  border: 1px solid var(--line-strong); border-radius: 100px; color: var(--text-muted);
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease); }
.subnav a:hover { color: var(--text); border-color: var(--text-muted); }
.subnav a[aria-current="page"] { color: var(--mint); border-color: var(--mint); background: var(--mint-dim); }
.probs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(1.5rem, 3vw, 2.5rem) clamp(2rem, 4vw, 4rem); }
.prob { display: grid; gap: 1.4rem; padding-top: clamp(1.8rem, 3.5vh, 2.6rem); border-top: 1px solid var(--line); }
.prob-stat { display: grid; gap: .5rem; }
.prob-num { font-size: clamp(2.6rem, 5vw, 4rem); letter-spacing: var(--tracking-tighter); line-height: 1; color: var(--mint); font-weight: 500; }
.prob-src { font-family: "Geist Mono", monospace; font-size: .72rem; letter-spacing: .02em; color: var(--text-muted); }
.prob-body h3 { font-size: var(--fs-h3); letter-spacing: var(--tracking-tight); margin-bottom: .8rem; text-wrap: pretty; }
.prob-body p { color: var(--text-muted); max-width: 58ch; }
.prob-ai { margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--line-strong); }
.prob-ai b { color: var(--mint); font-weight: 500; }
@media (max-width: 820px) { .probs { grid-template-columns: 1fr; } }
