/* BRS Technology — site styles */
:root {
  --ink: #13232b;
  --ink-2: #1c3240;
  --paper: #f2f5f6;
  --surface: #ffffff;
  --line: #d5dee1;
  --muted: #536872;
  --cold: #2c6fb0;
  --cold-deep: #173a6b;
  --teal: #3fa3a0;
  --warm: #eaa13a;
  --brand: #43d643;
  --brand-hover: #6be36b;
  --brand-deep: #1f8a2b;
  --brand-grey: #ababab;
  --hot: #d2522f;
  --on-dark: #e9eff1;
  --on-dark-muted: #9fb3bb;
  --radius-s: 4px;
  --radius-m: 10px;
  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --font: "Archivo", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  font-variation-settings: "wdth" 100;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--brand-deep); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
.on-dark a:not(.btn) { color: var(--brand); }
.on-dark a:not(.btn):hover { color: var(--brand-hover); }
:focus-visible { outline: 3px solid var(--brand); outline-offset: 3px; border-radius: 2px; }

h1, h2, h3 {
  font-stretch: 118%;
  font-variation-settings: "wdth" 118;
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: 0 0 0.5em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.2rem, 4.3vw, 3.5rem); font-weight: 760; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.6rem); font-weight: 720; }
h3 { font-size: 1.3rem; font-weight: 680; line-height: 1.2; }
p { margin: 0 0 1em; max-width: 66ch; }
.lead { font-size: clamp(1.1rem, 1.6vw, 1.3rem); line-height: 1.55; color: var(--muted); max-width: 58ch; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--brand); color: var(--ink); padding: 8px 14px; z-index: 100; font-weight: 600; }
.skip:focus { left: 8px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 0.85em 1.35em;
  border-radius: var(--radius-s);
  font-weight: 640; font-size: 1rem; line-height: 1.1;
  text-decoration: none; border: 2px solid transparent;
  transition: background-color .15s, color .15s, border-color .15s;
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: var(--ink-2); color: #fff; }
.btn-warm { background: var(--brand); color: var(--ink); }
.btn-warm:hover { background: var(--brand-hover); color: var(--ink); }
.btn-ghost { border-color: currentColor; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.on-dark .btn-ghost { color: var(--on-dark); }
.on-dark .btn-ghost:hover { background: var(--on-dark); color: var(--ink); border-color: var(--on-dark); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 1.75rem; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(19, 35, 43, .96); backdrop-filter: blur(8px); color: var(--on-dark); }
.site-header .wrap { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; margin-right: auto; }
.brand:hover { color: #fff; }
.brand img { height: 40px; width: auto; }
.site-footer .brand img { height: 30px; }
.brand-name { font-stretch: 125%; font-variation-settings: "wdth" 125; font-weight: 800; font-size: 1.25rem; letter-spacing: -0.01em; line-height: 1; }
.brand-name span { font-weight: 400; color: var(--on-dark-muted); }
.nav ul { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.nav a { color: var(--on-dark); text-decoration: none; padding: 8px 12px; border-radius: var(--radius-s); font-weight: 520; }
.nav a:hover { background: rgba(255,255,255,.08); color: #fff; }
.nav a[aria-current="page"] { color: #fff; box-shadow: inset 0 -2px 0 var(--brand); border-radius: 0; }
.header-cta { padding: .6em 1.05em; }
.nav-toggle { display: none; background: none; border: 1px solid rgba(255,255,255,.3); color: #fff; border-radius: var(--radius-s); padding: 8px 12px; font: inherit; font-weight: 600; cursor: pointer; }

@media (max-width: 880px) {
  .nav-toggle { display: inline-block; }
  .header-cta { display: none; }
  .nav { position: absolute; left: 0; right: 0; top: 100%; background: var(--ink); border-top: 1px solid rgba(255,255,255,.1); display: none; }
  .nav.open { display: block; }
  .nav ul { flex-direction: column; padding: 8px var(--gutter) 20px; }
  .nav a { display: block; padding: 12px 4px; font-size: 1.1rem; }
  .nav a[aria-current="page"] { box-shadow: none; color: var(--brand); }
}

/* Hero */
.hero { background: var(--ink); color: var(--on-dark); overflow: hidden; position: relative; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(24px, 4vw, 56px); align-items: center; padding-top: clamp(48px, 8vw, 104px); padding-bottom: clamp(48px, 7vw, 96px); }
.hero h1 { color: #fff; }
.hero .lead { color: var(--on-dark-muted); }
.thermal { margin: 0; }
.thermal-frame { position: relative; }
.thermal img { width: 100%; filter: saturate(1.05); }
.thermal-scale { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; margin-top: 14px; font-size: .85rem; color: var(--on-dark-muted); }
.thermal-scale .bar { height: 8px; border-radius: 4px; background: linear-gradient(90deg, #173a6b 0%, #2c6fb0 25%, #3fa3a0 45%, #c9c46a 62%, #eaa13a 80%, #d2522f 100%); }
.thermal figcaption { margin-top: 10px; font-size: .9rem; color: var(--on-dark-muted); max-width: 52ch; }
.zone { position: absolute; font-size: .8rem; font-weight: 600; color: var(--on-dark); background: rgba(19,35,43,.7); padding: 3px 8px; border-radius: 3px; }
.zone-in { right: 6%; top: 14%; }
.zone-out { left: 1%; top: 14%; }
@media (max-width: 880px) { .hero .wrap { grid-template-columns: 1fr; } }

/* reveal of the thermal map — the one orchestrated motion moment */
@media (prefers-reduced-motion: no-preference) {
  .thermal img { animation: heat-in 1.6s cubic-bezier(.2,.7,.2,1) both .15s; }
  @keyframes heat-in { from { clip-path: inset(0 0 0 100%); filter: saturate(0) brightness(.6); } to { clip-path: inset(0 0 0 0); filter: saturate(1.05); } }
}

/* Clients strip */
.clients { border-bottom: 1px solid var(--line); background: var(--surface); }
.clients .wrap { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 28px; padding-top: 22px; padding-bottom: 22px; color: var(--muted); }
.clients strong { color: var(--ink); font-stretch: 112%; font-variation-settings: "wdth" 112; font-weight: 700; font-size: 1.15rem; }

/* Sections */
.section { padding: clamp(56px, 8vw, 112px) 0; }
.section-light { background: var(--surface); }
.section-dark { background: var(--ink); color: var(--on-dark); }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark p { color: var(--on-dark-muted); }
.section-head { max-width: 760px; margin-bottom: clamp(28px, 4vw, 48px); }

/* Capabilities — ruled rows, not cards */
.capabilities { border-top: 2px solid var(--ink); }
.cap { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr) auto; gap: 12px 40px; padding: 28px 0; border-bottom: 1px solid var(--line); align-items: start; }
.cap h3 { margin: 0; }
.cap p { margin: 0; color: var(--muted); }
.cap .cap-link { white-space: nowrap; font-weight: 600; }
.cap-swatch { display: inline-block; width: 12px; height: 12px; border-radius: 2px; margin-right: 10px; vertical-align: 1px; }
@media (max-width: 760px) { .cap { grid-template-columns: 1fr; } }

/* Split layout */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.split-wide { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); }
@media (max-width: 880px) { .split, .split-wide { grid-template-columns: 1fr; } }

.feature-list { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 18px 28px; }
.feature-list li { padding-left: 18px; border-left: 3px solid var(--brand); }
.feature-list strong { display: block; font-weight: 680; }
.feature-list span { color: var(--muted); font-size: .97rem; }
.section-dark .feature-list span { color: var(--on-dark-muted); }
@media (max-width: 560px) { .feature-list { grid-template-columns: 1fr; } }

.panel { background: var(--ink); border-radius: var(--radius-m); padding: clamp(20px, 3vw, 32px); color: var(--on-dark); }
.panel-light { background: var(--paper); color: var(--ink); border: 1px solid var(--line); }

/* Projects */
.project { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(28px, 5vw, 64px); align-items: center; padding: clamp(36px, 5vw, 56px) 0; border-top: 1px solid var(--line); }
.project:first-of-type { border-top: 0; padding-top: 0; }
.project:nth-of-type(even) .project-art { order: 2; }
.project-art { background: var(--paper); border-radius: var(--radius-m); border: 1px solid var(--line); padding: clamp(16px, 3vw, 28px); }
.project-client { color: var(--muted); font-weight: 600; margin-bottom: .4em; }
@media (max-width: 880px) { .project { grid-template-columns: 1fr; } .project:nth-of-type(even) .project-art { order: 0; } }

/* Prose pages */
.page-hero { background: var(--ink); color: var(--on-dark); padding: clamp(48px, 7vw, 88px) 0 clamp(40px, 6vw, 72px); }
.page-hero h1 { color: #fff; max-width: 18ch; }
.page-hero .lead { color: var(--on-dark-muted); }
.crumbs { font-size: .9rem; color: var(--on-dark-muted); margin-bottom: 1.25rem; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0; }
.crumbs li + li::before { content: "/"; margin-right: 6px; opacity: .6; }
.on-dark .crumbs a, .crumbs a { color: var(--on-dark); }
.prose h2 { margin-top: 1.6em; }
.prose h2:first-child { margin-top: 0; }
.prose ul { padding-left: 1.2em; max-width: 64ch; }
.prose li { margin-bottom: .4em; }

.principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 40px); }
.principles > div { border-top: 3px solid var(--ink); padding-top: 18px; }
.principles > div { border-color: var(--brand); }
.principles p { color: var(--muted); }
@media (max-width: 760px) { .principles { grid-template-columns: 1fr; } }

.users { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; margin: 1rem 0 0; }
.users li { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 6px 14px; font-weight: 560; }
.trusted { color: var(--muted); max-width: 70ch; }

/* FAQ */
.faq details { border-bottom: 1px solid var(--line); padding: 4px 0; }
.faq details:first-child { border-top: 2px solid var(--ink); }
.faq summary { cursor: pointer; list-style: none; padding: 18px 36px 18px 0; font-weight: 680; font-size: 1.15rem; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 12px; font-size: 1.6rem; font-weight: 400; color: var(--muted); }
.faq details[open] summary::after { content: "–"; }
.faq details > div { padding: 0 0 18px; color: var(--muted); }

/* CTA band */
.cta-band { background: var(--ink-2); border-top: 4px solid var(--brand); color: var(--on-dark); padding: clamp(48px, 7vw, 88px) 0; }
.cta-band h2 { color: #fff; max-width: 22ch; }
.cta-band p { color: var(--on-dark-muted); }
.cta-band .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px 48px; align-items: end; }
@media (max-width: 760px) { .cta-band .wrap { grid-template-columns: 1fr; } }

/* Contact */
.contact-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(32px, 5vw, 72px); }
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }
.form { display: grid; gap: 18px; }
.form label { display: block; font-weight: 620; margin-bottom: 6px; }
.form input, .form textarea { width: 100%; font: inherit; color: var(--ink); background: var(--surface); border: 1.5px solid #b9c7cc; border-radius: var(--radius-s); padding: 12px 14px; }
.form input:focus, .form textarea:focus { outline: none; border-color: var(--brand-deep); box-shadow: 0 0 0 3px rgba(67,214,67,.3); }
.form textarea { min-height: 170px; resize: vertical; }
.form .hint { font-size: .9rem; color: var(--muted); margin: 0; }
.form .error { color: #a3341b; font-size: .92rem; margin: 6px 0 0; }
.contact-details dl { margin: 0; }
.contact-details dt { font-weight: 680; margin-top: 18px; }
.contact-details dt:first-child { margin-top: 0; }
.contact-details dd { margin: 4px 0 0; color: var(--muted); }

/* Footer */
.site-footer { background: #0e1a20; color: var(--on-dark-muted); padding: 56px 0 28px; font-size: .95rem; }
.site-footer a { color: var(--on-dark); text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 32px; }
.footer-grid h2 { font-size: 1rem; color: #fff; font-stretch: 100%; font-variation-settings: "wdth" 100; letter-spacing: 0; margin-bottom: .8em; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-grid address { font-style: normal; line-height: 1.7; }
.footer-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: 44px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.1); font-size: .88rem; }
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

.notfound { min-height: 60vh; display: flex; align-items: center; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

@media (max-width: 400px) { .brand img { height: 28px; } }

/* News */
.news-list { border-top: 2px solid var(--ink); max-width: 860px; }
.news-item { padding: 26px 0; border-bottom: 1px solid var(--line); }
.news-item h2 { font-size: clamp(1.3rem, 2.2vw, 1.7rem); margin: 0 0 .35em; }
.news-item h2 a { color: var(--ink); text-decoration: none; }
.news-item h2 a:hover { color: var(--brand-deep); text-decoration: underline; }
.news-item p { color: var(--muted); margin: 0; }
.news-date { font-size: .92rem; font-weight: 600; margin-bottom: 6px !important; }
.post-body { max-width: 70ch; font-size: 1.1rem; }
.post-body h2 { font-size: 1.6rem; margin-top: 1.6em; }
.post-body h3 { margin-top: 1.4em; }