/* Groundfloor AI — shared styles.
   Layout concept: a black "site plan". Thin measured grid lines, hours as the unit of everything,
   one amber highlight that always means "this is the bottleneck". */
:root {
  --bg: #0a0a0b;          /* page: black, as requested */
  --panel: #141416;       /* raised surfaces */
  --panel-2: #1c1c1f;
  --line: #2a2a2e;        /* hairlines and grid */
  --fg: #f2efe9;          /* warm off-white text */
  --muted: #a4a19b;
  --dim: #6e6c68;
  --amber: #f0b54a;       /* the bottleneck colour, used sparingly */
  --amber-ink: #1a1203;
  --sky: #8fb8d8;         /* "after" / fixed state in charts */
  --good: #8fcf9c;
  --f-display: "Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;
  --f-body: "Public Sans", "Segoe UI", Roboto, Arial, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --wrap: 72rem;
  --radius: 10px;
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 400 1.0625rem/1.6 var(--f-body);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
a { color: var(--fg); text-decoration-color: var(--amber); text-underline-offset: 3px; }
a:hover { color: var(--amber); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3, h4 { font-family: var(--f-display); font-weight: 600; line-height: 1.1; text-wrap: balance; margin: 0; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 5.6vw, 4.4rem); font-weight: 700; letter-spacing: -0.035em; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.8rem); }
h3 { font-size: 1.3rem; letter-spacing: -0.01em; }
p { margin: 0; }
.mono { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
.eyebrow { font: 500 0.78rem/1 var(--f-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.eyebrow b { color: var(--amber); font-weight: 500; }
.lede { font-size: 1.2rem; color: var(--muted); max-width: 40rem; }
.hl { color: var(--amber); }

.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: clamp(16px, 4vw, 40px); }
section { padding-block: clamp(4rem, 9vw, 7rem); border-top: 1px solid var(--line); }
.section-head { display: grid; gap: 1rem; margin-bottom: 3rem; max-width: 46rem; }

/* header */
.site-head { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10; background: rgba(10,10,11,0.86); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 0.9rem; }
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; font: 700 1.1rem/1 var(--f-display); letter-spacing: -0.02em; }
.brand svg { width: 28px; height: 28px; flex: none; }
.nav { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; justify-content: flex-end; }
.nav a { text-decoration: none; color: var(--muted); font-size: 0.95rem; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--fg); }
@media (max-width: 760px) { .nav a:not(.btn) { display: none; } .nav a.keep { display: inline; } }

.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.8rem 1.25rem; border-radius: 999px; background: var(--amber); color: var(--amber-ink) !important; font: 600 0.98rem/1 var(--f-body); text-decoration: none; border: 0; cursor: pointer; white-space: nowrap; }
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--fg) !important; border: 1px solid var(--line); }
.btn.ghost:hover { border-color: var(--muted); }
.btn.sm { padding: 0.6rem 1rem; font-size: 0.9rem; }

/* hero */
.hero { border-top: 0; padding-block: clamp(3rem, 7vw, 6rem); background:
  linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 64px,
  linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 64px 100%; background-color: var(--bg); }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero-copy { display: grid; gap: 1.5rem; min-width: 0; }
.hero-copy .actions { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center; }
.hero-copy .note { font-size: 0.9rem; color: var(--dim); }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } }

/* panels and figures */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
figure { margin: 0; }
figcaption { font: 400 0.82rem/1.5 var(--f-mono); color: var(--dim); margin-top: 0.75rem; }
.chart text { fill: var(--muted); font-family: var(--f-mono); font-size: 12px; }
.chart .strong { fill: var(--fg); }

/* stat row */
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.stat { background: var(--bg); padding: 1.75rem; display: grid; gap: 0.6rem; align-content: start; }
.stat .num { font: 700 clamp(2.4rem, 5vw, 3.4rem)/1 var(--f-display); letter-spacing: -0.04em; }
.stat p { color: var(--muted); font-size: 0.98rem; }
.stat .src { font: 0.75rem/1.4 var(--f-mono); color: var(--dim); }
.stat .src a { color: var(--dim); }
@media (max-width: 760px) { .stats { grid-template-columns: 1fr; } }

/* process */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.25rem; counter-reset: s; }
.step { padding: 1.5rem; display: grid; gap: 0.9rem; align-content: start; position: relative; }
.step .ico { width: 44px; height: 44px; }
.step .when { font: 500 0.78rem/1 var(--f-mono); color: var(--amber); letter-spacing: 0.06em; text-transform: uppercase; }
.step p { color: var(--muted); font-size: 0.96rem; }
.steps-track { height: 2px; background: linear-gradient(90deg, var(--amber) 0 25%, var(--line) 25%); margin-bottom: 1.25rem; border-radius: 2px; }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } .steps-track { display: none; } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

/* two-col */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.split > * { min-width: 0; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.ticks { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.9rem; }
.ticks li { display: grid; grid-template-columns: 22px 1fr; gap: 0.75rem; color: var(--muted); }
.ticks li::before { content: ""; width: 14px; height: 14px; margin-top: 0.4rem; border: 2px solid var(--amber); border-radius: 3px; }
.ticks b { color: var(--fg); font-weight: 600; }

/* paper mock (the one-page diagnosis) */
.paper { background: #f4f1ea; color: #1b1a17; border-radius: 6px; padding: 1.75rem; box-shadow: 0 30px 60px -20px rgba(0,0,0,0.8); transform: rotate(-1.2deg); font-size: 0.86rem; line-height: 1.45; display: grid; gap: 0.9rem; max-width: 30rem; margin-inline: auto; }
.paper h4 { font: 700 1.15rem/1.2 var(--f-display); color: #1b1a17; }
.paper .k { font: 500 0.68rem/1 var(--f-mono); letter-spacing: 0.1em; text-transform: uppercase; color: #6b665c; }
.paper .row { display: grid; grid-template-columns: 7.5rem 1fr; gap: 0.75rem; border-top: 1px solid #d9d3c6; padding-top: 0.7rem; }
.paper .big { font: 700 1.5rem/1 var(--f-display); color: #a86a00; }
.paper .stamp { justify-self: end; font: 600 0.7rem/1 var(--f-mono); letter-spacing: 0.1em; color: #6b665c; border: 1px solid #b7b0a2; padding: 0.35rem 0.5rem; border-radius: 3px; }

/* sector cards */
.sectors { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.sector { padding: 1.75rem; display: grid; gap: 1rem; align-content: start; }
.sector svg.pic { width: 100%; height: auto; display: block; border-radius: 6px; background: var(--panel-2); }
.sector p { color: var(--muted); font-size: 0.96rem; }
.sector .offer { border-top: 1px dashed var(--line); padding-top: 1rem; font-size: 0.92rem; color: var(--fg); }
.sector .offer span { display: block; font: 500 0.72rem/1 var(--f-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--amber); margin-bottom: 0.5rem; }
@media (max-width: 900px) { .sectors { grid-template-columns: 1fr; } }

/* resource tiles (case studies + whitepapers) */
.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.tile { display: grid; grid-template-columns: 120px 1fr; gap: 1.25rem; padding: 1.25rem; text-decoration: none; align-items: center; transition: border-color .15s; }
.tile:hover { border-color: var(--amber); color: var(--fg); }
.tile .cover { aspect-ratio: 3 / 4; border-radius: 6px; background: var(--panel-2); display: grid; place-items: center; overflow: hidden; max-width: 100%; }
.tile .cover svg { width: 100%; height: 100%; }
.tile h3 { font-size: 1.1rem; }
.tile p { color: var(--muted); font-size: 0.92rem; margin-top: 0.4rem; }
.tile .tag { font: 500 0.7rem/1 var(--f-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--amber); }
@media (max-width: 760px) { .tiles { grid-template-columns: 1fr; } .tile { grid-template-columns: 84px 1fr; } }

/* labels */
.badge { display: inline-flex; align-items: center; gap: 0.4rem; font: 500 0.72rem/1 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--amber); border: 1px solid rgba(240,181,74,0.45); border-radius: 999px; padding: 0.4rem 0.7rem; width: fit-content; }
.notice { border: 1px solid rgba(240,181,74,0.4); background: rgba(240,181,74,0.07); border-radius: var(--radius); padding: 1rem 1.25rem; color: var(--fg); font-size: 0.95rem; }

/* about */
.about { display: grid; grid-template-columns: 220px 1fr; gap: clamp(1.5rem, 4vw, 3rem); align-items: start; }
.about .portrait { aspect-ratio: 1; border-radius: var(--radius); background: var(--panel-2); border: 1px solid var(--line); display: grid; place-items: center; max-width: 100%; }
.about .body { display: grid; gap: 1rem; color: var(--muted); max-width: 40rem; min-width: 0; }
.about .body strong { color: var(--fg); }
.facts { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.facts span { font: 0.8rem/1 var(--f-mono); border: 1px solid var(--line); border-radius: 999px; padding: 0.5rem 0.75rem; color: var(--fg); }
@media (max-width: 700px) { .about { grid-template-columns: 1fr; } .about .portrait { width: 140px; } }

/* faq */
.faq { display: grid; gap: 0; border-top: 1px solid var(--line); max-width: 52rem; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 1rem; padding-block: 1.25rem; font: 600 1.15rem/1.3 var(--f-display); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 1.5rem/1 var(--f-mono); color: var(--amber); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--muted); padding-bottom: 1.25rem; max-width: 44rem; }

/* contact */
.contact { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(2rem, 5vw, 4rem); }
.contact > * { min-width: 0; }
form.enquiry { display: grid; gap: 1rem; padding: clamp(1.25rem, 3vw, 2rem); }
form.enquiry label { display: grid; gap: 0.4rem; font-size: 0.9rem; color: var(--muted); }
form.enquiry input, form.enquiry textarea { width: 100%; font: inherit; color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 0.75rem 0.9rem; }
form.enquiry input:focus, form.enquiry textarea:focus { outline: none; border-color: var(--amber); }
form.enquiry textarea { min-height: 7rem; resize: vertical; }
.form-msg { font-size: 0.92rem; color: var(--good); }
.form-msg.err { color: var(--amber); }
@media (max-width: 860px) { .contact { grid-template-columns: 1fr; } }

/* footer */
.site-foot { border-top: 1px solid var(--line); padding-block: 2.5rem; color: var(--dim); font-size: 0.9rem; }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between; }
.site-foot a { color: var(--muted); }
.site-foot nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }

/* long-form pages (case studies, whitepapers) */
.page-hero { border-top: 0; padding-block: clamp(3rem, 6vw, 5rem) clamp(2rem, 4vw, 3rem); }
.page-hero .wrap { display: grid; gap: 1.25rem; }
.case { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.case > * { min-width: 0; }
.case .body { display: grid; gap: 1.25rem; }
.case .body p { color: var(--muted); }
.case dl { display: grid; grid-template-columns: 9rem 1fr; gap: 0.75rem 1rem; margin: 0; font-size: 0.96rem; }
.case dt { font: 500 0.75rem/1.6 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--dim); }
.case dd { margin: 0; color: var(--fg); }
.case .not { color: var(--muted); }
@media (max-width: 860px) { .case { grid-template-columns: 1fr; } .case dl { grid-template-columns: 1fr; gap: 0.2rem; } .case dd { margin-bottom: 0.75rem; } }
.legend { display: flex; gap: 1.25rem; flex-wrap: wrap; font: 0.78rem/1 var(--f-mono); color: var(--muted); margin-top: 0.75rem; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 0.4rem; vertical-align: -1px; }

.article { max-width: 44rem; margin: 0 auto; display: grid; gap: 1.25rem; }
.article p, .article li { color: #d6d2ca; }
.article h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 1.5rem; }
.article h3 { margin-top: 0.75rem; }
.article ul, .article ol { margin: 0; padding-left: 1.25rem; display: grid; gap: 0.5rem; }
.article figure { margin-block: 1rem; padding: 1.25rem; }
.article .callout { border-left: 3px solid var(--amber); padding: 0.25rem 0 0.25rem 1.25rem; font: 500 1.2rem/1.45 var(--f-display); color: var(--fg); }
.article table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.article th, .article td { text-align: left; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.article th { font: 500 0.72rem/1.4 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--dim); }
.table-scroll { overflow-x: auto; }
.meta { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; font: 0.82rem/1.4 var(--f-mono); color: var(--dim); }
.sources { font-size: 0.85rem; }
.sources li { color: var(--muted); }
.sources a { color: var(--muted); }
.paper-cta { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between; padding: 1.5rem; margin-top: 2rem; }
.paper-cta p { color: var(--muted); max-width: 30rem; }
.back { font: 0.85rem/1 var(--f-mono); color: var(--muted); text-decoration: none; }

/* ---------- home page: fixed network-graph backdrop, content scrolls over it ---------- */
.backdrop { position: fixed; inset: 0; z-index: 0; pointer-events: none; background: var(--bg); }
.backdrop canvas { width: 100%; height: 100%; display: block; }
.backdrop::after { content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 40%, rgba(10,10,11,0.05), rgba(10,10,11,0.5) 80%); }
body.home > main, body.home > footer { position: relative; z-index: 1; }
body.home > .site-head { z-index: 10; }
body.home .site-head { background: rgba(10,10,11,0.7); }
body.home section { border-top: 0; }
body.home .panel { background: rgba(20,20,22,0.82); backdrop-filter: blur(6px); }
body.home .site-foot { background: rgba(10,10,11,0.8); }
.hero-lean { min-height: min(86vh, 52rem); display: grid; align-items: center; padding-block: clamp(4rem, 10vw, 8rem); }
.hero-lean .wrap { width: 100%; display: grid; gap: 1.75rem; justify-items: start; }
.hero-lean h1 { font-size: clamp(2.8rem, 7.5vw, 6rem); max-width: 14ch; }
.hero-lean .lede { font-size: clamp(1.15rem, 2vw, 1.4rem); max-width: 34rem; color: #cfcbc4; }
.hero-lean .actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.scroll-cue { font: 0.78rem/1 var(--f-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--dim); text-decoration: none; }
.lean-head { display: grid; gap: 0.9rem; margin-bottom: 2.25rem; max-width: 40rem; }

/* why-now story: three linked steps */
.story { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; counter-reset: none; }
.story-step { padding: 1.75rem; display: grid; gap: 0.9rem; align-content: start; position: relative; }
.story-step .num { font: 700 clamp(2.4rem, 5vw, 3.4rem)/1 var(--f-display); letter-spacing: -0.04em; }
.story-step p { color: var(--muted); font-size: 0.98rem; }
.story-step .src { font: 0.75rem/1.4 var(--f-mono); color: var(--dim); }
.story-step .src a { color: var(--dim); }
.story-n { font: 500 0.75rem/1 var(--f-mono); color: var(--amber); width: 1.75rem; height: 1.75rem; border: 1px solid rgba(240,181,74,0.5); border-radius: 50%; display: grid; place-items: center; }
.story-step:not(:last-child)::after { content: ""; position: absolute; top: 2.6rem; right: -1.25rem; width: 1.25rem; height: 1px; background: rgba(240,181,74,0.5); }
.story-viz { width: 100%; height: auto; display: block; margin-block: 0.25rem; }
.story-close { margin-top: 2rem; font: 500 clamp(1.15rem, 2vw, 1.4rem)/1.4 var(--f-display); max-width: 40rem; }
.story-close a { color: var(--amber); }
@media (max-width: 860px) { .story { grid-template-columns: 1fr; } .story-step:not(:last-child)::after { display: none; } }

/* larger type for the Why now and How it works sections */
.big-type .lean-head { max-width: 56rem; gap: 1.1rem; margin-bottom: 2.75rem; }
.big-type .eyebrow { font-size: 0.92rem; }
.big-type h2 { font-size: clamp(2.2rem, 4.8vw, 3.8rem); }
.big-type .story-step { padding: 2rem; gap: 1.1rem; }
.big-type .story-step .num { font-size: clamp(3rem, 6.2vw, 4.6rem); }
.big-type .story-step p { font-size: clamp(1.1rem, 1.5vw, 1.25rem); line-height: 1.5; color: #cfcbc4; }
.big-type .story-step .src { font-size: 0.82rem; }
.big-type .story-n { width: 2.1rem; height: 2.1rem; font-size: 0.9rem; }
.big-type .story-close { font-size: clamp(1.35rem, 2.6vw, 1.9rem); max-width: 50rem; }
.big-type .step { padding: 1.75rem; gap: 1.1rem; }
.big-type .step .ico { width: 56px; height: 56px; }
.big-type .step .when { font-size: 0.9rem; }
.big-type .step h3 { font-size: clamp(1.4rem, 2vw, 1.75rem); line-height: 1.15; }

/* every section heading on the home page uses the same size */
body.home section h2 { font-size: clamp(2.2rem, 4.8vw, 3.8rem); }
.sector-links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; border-top: 1px dashed var(--line); padding-top: 1rem; }
.sector-links a { font: 500 0.92rem/1.3 var(--f-body); color: var(--amber); text-decoration: none; }
.sector-links a:hover { text-decoration: underline; }
.sector-more { margin-top: 1.75rem; color: var(--muted); font-size: 1.05rem; }
.sector-more a { color: var(--fg); }
.big-type .sector h3 { font-size: clamp(1.3rem, 1.8vw, 1.55rem); }
.big-type .sector p { font-size: 1.08rem; }