/* Silver Spuron Holdings Inc — Swiss-red architectural system
   Type: condensed grotesque headings at regular weight; bold reserved for labels and H3 */
:root {
  --bg: #fffdf9;
  --paper: #f5f1e8;
  --text: #23252a;
  --muted: #55575e;
  --accent: #be342d;
  --accent-dark: #9e2a24;
  --ink: #18191c;
  --rule: #dcd7ce;
  --font: Arial, Helvetica, sans-serif;
  --font-head: "Arial Narrow", "Helvetica Neue Condensed", "HelveticaNeue-CondensedBold", "Helvetica Condensed", "Liberation Sans Narrow", "Nimbus Sans Narrow", "Roboto Condensed", Arial, Helvetica, sans-serif;
  --gutter: 24px;
  --pad: 48px;
  --max: 1280px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
h1, h2, h3, h4, p, ul, ol, figure, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.on-dark a:focus-visible, .on-red a:focus-visible, .on-dark button:focus-visible, .site-footer a:focus-visible { outline-color: #fff; }

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 300;
  background: var(--ink); color: #fff; padding: 10px 14px; font-weight: 700; text-decoration: none;
}
.skip-link:focus { top: 12px; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gutter); }
section { scroll-margin-top: 90px; }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 100; background: var(--bg); border-bottom: 1px solid var(--rule); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 76px; }
.brand { text-decoration: none; font-weight: 700; font-size: 15px; line-height: 1.15; display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 14px; height: 14px; background: var(--accent); flex: none; }
.brand span span { display: block; }
.primary-nav { display: flex; align-items: center; gap: 36px; }
.primary-nav ul { display: flex; gap: 28px; }
.primary-nav a { text-decoration: none; font-size: 14px; padding: 6px 0; border-bottom: 2px solid transparent; }
.primary-nav a:hover { color: var(--accent); }
.primary-nav a[aria-current="page"] { border-bottom-color: var(--accent); font-weight: 700; }
.menu-toggle { display: none; width: 44px; height: 44px; background: transparent; border: 0; cursor: pointer; padding: 10px; }
.menu-toggle span { display: block; height: 2px; background: var(--text); margin: 5px 0; transition: transform .2s, opacity .2s; }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Buttons & links ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 46px; padding: 10px 22px;
  background: var(--accent); color: #fff; border: 2px solid var(--accent);
  font: 700 14px/1.2 var(--font); text-decoration: none; cursor: pointer;
}
.btn:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--text); }
.btn-ghost:hover { background: var(--text); color: var(--bg); border-color: var(--text); }
.on-dark .btn-ghost, .on-red .btn-ghost { color: #fff; border-color: #fff; }
.on-dark .btn-ghost:hover, .on-red .btn-ghost:hover { background: #fff; color: var(--ink); }
.on-red .btn:not(.btn-ghost) { background: #fff; color: var(--accent); border-color: #fff; }
.on-red .btn:not(.btn-ghost):hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn-small { min-height: 36px; padding: 7px 16px; font-size: 13px; }
.more { display: inline-flex; gap: 8px; align-items: center; font-size: 14px; font-weight: 700; color: var(--accent); text-decoration: none; padding: 6px 0; }
.more::after { content: "\2192"; transition: transform .2s; }
.more:hover { text-decoration: underline; }
.more:hover::after { transform: translateX(4px); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* ---------- Type scale ----------
   Headings: condensed, weight 400, tight leading.
   Labels: Arial 700, small, tracked uppercase.
   Lead copy is deliberately large so body text carries real weight next to the headings. */
.h-display, .h-section, .h-sub, .statement-text, .num, .giant {
  font-family: var(--font-head);
  font-stretch: condensed;
  font-weight: 400;
}
.h-display { font-size: clamp(34px, 4.4vw, 62px); line-height: 1.02; letter-spacing: -0.5px; }
.h-section { font-size: clamp(28px, 2.9vw, 42px); line-height: 1.06; letter-spacing: -0.3px; }
.h-sub { font-size: clamp(22px, 1.9vw, 27px); line-height: 1.15; }
h3, .h-item { font-family: var(--font-head); font-stretch: condensed; font-weight: 700; font-size: 20px; line-height: 1.2; }
.label {
  display: flex; align-items: center; gap: 10px;
  font: 700 12px/1.3 var(--font); letter-spacing: 1.4px; text-transform: uppercase; color: var(--muted);
}
.label::before { content: ""; width: 9px; height: 9px; background: var(--accent); flex: none; }
.label.plain::before { display: none; }
.on-red .label, .on-dark .label { color: rgba(255,255,255,.78); }
.on-red .label::before { background: #fff; }
.lead { font-size: clamp(18px, 1.55vw, 22px); line-height: 1.5; color: var(--text); }
.copy { color: var(--muted); }
.copy p + p { margin-top: 14px; }
.small { font-size: 14px; color: var(--muted); }
.num { color: var(--accent); line-height: .85; font-size: clamp(44px, 4.4vw, 64px); }
.rule { border-top: 1px solid var(--text); }
.rule-red { border-top: 4px solid var(--accent); }

/* ---------- Photos ---------- */
.photo { position: relative; overflow: hidden; background: var(--ink); margin: 0; aspect-ratio: 1 / 1; }
.photo img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(.9) contrast(1.05); }
.photo.wide { aspect-ratio: 2 / 1; }
.photo figcaption, .photo .cap {
  position: absolute; left: 0; bottom: 0; right: 0;
  padding: 30px 14px 12px; color: #fff; font-size: 13px; font-weight: 700; line-height: 1.25;
  background: linear-gradient(to top, rgba(16,17,19,.84), rgba(16,17,19,0));
}
.photo .marker { position: absolute; top: 0; left: 0; width: 22px; height: 22px; background: var(--accent); }
.photo .marker-num { position: absolute; top: 14px; left: 16px; color: var(--accent); font: 400 clamp(56px, 6vw, 92px)/.8 var(--font-head); font-stretch: condensed; text-shadow: 0 1px 0 rgba(0,0,0,.2); }
a.photo { text-decoration: none; display: block; }
a.photo img { transition: transform .5s ease; }
a.photo:hover img { transform: scale(1.03); }

/* =========================================================
   HOME
   ========================================================= */
.hero { padding: 80px 0 64px; }
.hero .label { margin-bottom: 28px; }
.hero h1 { grid-column: 1 / span 8; max-width: 13.5em; }
.hero-side { grid-column: 9 / span 4; align-self: end; border-left: 1px solid var(--text); padding-left: 20px; font-size: 14px; color: var(--muted); }
.hero-side dt { font-weight: 700; color: var(--text); margin-top: 12px; }
.hero-side dt:first-child { margin-top: 0; }
.hero-side a { color: var(--text); word-break: break-word; }
.hero-lower { margin-top: 48px; align-items: end; }
.hero-lower .lead { grid-column: 1 / span 7; }
.hero-lower .actions { grid-column: 9 / span 4; }

/* Layered capability directory */
.directory { padding: 0 0 96px; }
.directory-top { padding-top: 22px; margin-bottom: 44px; align-items: start; }
.directory-top h2 { grid-column: 1 / span 4; }
.directory-top p { grid-column: 6 / span 7; }
.layers { display: grid; grid-template-columns: 6fr 3fr 3fr; gap: var(--gutter); counter-reset: idx; }
.layer { border-top: 4px solid var(--text); padding-top: 18px; }
.layer:first-child { border-top-color: var(--accent); }
.layer-head { display: grid; grid-template-columns: auto 1fr; gap: 4px 16px; align-items: end; margin-bottom: 22px; }
.layer-head .num { grid-row: span 2; }
.layer-head .label { margin: 0; }
.layer-head h3 { font-size: 26px; font-weight: 400; }
.layer-intro { font-size: 15px; color: var(--muted); margin-bottom: 22px; }
.layer-caps { display: grid; gap: var(--gutter); }
.layer:first-child .layer-caps { grid-template-columns: 1fr 1fr; }
.cap-entry h4 { font: 700 16px/1.25 var(--font); margin-bottom: 10px; }
.cap-entry h4 a { text-decoration: none; }
.cap-entry h4 a:hover { color: var(--accent); text-decoration: underline; }
.idx { font-size: 14px; border-top: 1px solid var(--rule); }
.idx li { counter-increment: idx; display: grid; grid-template-columns: 28px 1fr; padding: 6px 0; border-bottom: 1px solid var(--rule); color: var(--muted); }
.idx li::before { content: counter(idx, decimal-leading-zero); color: var(--accent); font-weight: 700; font-size: 12px; padding-top: 2px; }
.cap-entry .more { margin-top: 8px; }

/* Brand statement + photo board */
.statement { padding-bottom: 96px; }
.board { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.board .red-block { grid-column: span 2; }
.red-block {
  background: var(--accent); color: #fff; padding: clamp(24px, 3.4vw, 48px);
  display: flex; flex-direction: column; justify-content: space-between; gap: 24px;
}
.statement-text { font-size: clamp(30px, 3.5vw, 52px); line-height: 1.02; letter-spacing: -0.3px; max-width: 12em; }
.red-block p:last-child { font-size: 16px; max-width: 34em; }
.statement-foot { margin-top: 40px; align-items: start; }
.statement-foot .label { grid-column: 1 / span 3; padding-top: 6px; }
.statement-foot .lead { grid-column: 4 / span 5; }
.statement-foot .copy { grid-column: 9 / span 4; font-size: 15px; }

/* Use cases */
.use-cases { padding-bottom: 96px; }
.uc { align-items: start; }
.uc > .photo { grid-column: 1 / span 5; }
.uc-body { grid-column: 7 / span 6; }
.uc-body h2 { margin: 16px 0 18px; }
.uc-body > .copy { margin-bottom: 32px; }
.scen li { display: grid; grid-template-columns: 56px 1fr; gap: 6px 16px; padding: 20px 0; border-top: 1px solid var(--rule); }
.scen li:last-child { border-bottom: 1px solid var(--rule); }
.scen .num { font-size: 40px; grid-row: span 3; }
.scen p { font-size: 15px; color: var(--muted); }
.scen .uses { font-size: 13px; color: var(--text); }
.scen .uses a { color: var(--accent); font-weight: 700; text-decoration: none; }
.scen .uses a:hover { text-decoration: underline; }

/* About index (home) */
.about-index { padding-bottom: 96px; }
.ai { padding-top: 22px; align-items: start; }
.ai-nav { grid-column: 1 / span 3; }
.ai-main { grid-column: 4 / span 5; }
.ai-facts { grid-column: 10 / span 3; display: grid; gap: 22px; }
.ai-nav ul { margin-top: 14px; }
.ai-nav li a { display: inline-block; padding: 5px 0; text-decoration: none; }
.ai-nav li a:hover { color: var(--accent); text-decoration: underline; }
.ai-main h2 { margin: 14px 0 18px; }
.ai-main .more { margin-top: 16px; }
.ai-facts h3 { font-size: 18px; margin-bottom: 4px; }
.ai-facts p, .ai-facts address { font-style: normal; font-size: 15px; color: var(--muted); }
.ai-facts a { color: var(--text); font-weight: 700; word-break: break-word; }

/* Approach track */
.approach { padding-bottom: 96px; }
.approach-top { padding-top: 22px; margin-bottom: 40px; align-items: end; }
.approach-top > div { grid-column: 1 / span 6; }
.approach-top > div h2 { margin-top: 14px; }
.approach-top > p { grid-column: 8 / span 5; }
.track { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); counter-reset: st; }
.track li { counter-increment: st; padding: 0 var(--gutter) 0 0; }
.track li::before {
  content: counter(st, decimal-leading-zero); display: block;
  font: 400 clamp(40px, 4vw, 56px)/1 var(--font-head); font-stretch: condensed; color: var(--text);
  padding-bottom: 14px; margin-bottom: 18px; border-bottom: 4px solid var(--text);
}
.track li:first-child::before { color: var(--accent); border-bottom-color: var(--accent); }
.track h3 { margin-bottom: 8px; }
.track p { font-size: 15px; color: var(--muted); }

/* Contact band */
.contact-band { background: var(--ink); color: #fff; padding: 72px 0 80px; }
.cb-title { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; padding-bottom: 28px; border-bottom: 1px solid #3a3c42; }
.giant { font-size: clamp(56px, 8vw, 116px); line-height: .9; letter-spacing: -1px; }
.cb-arrow { color: var(--accent); font-size: clamp(36px, 4vw, 56px); text-decoration: none; line-height: 1; }
.cb-arrow:hover { color: #fff; }
.cb-body { margin-top: 40px; align-items: start; }
.cb-body .photo { grid-column: 1 / span 5; }
.cb-text { grid-column: 7 / span 6; }
.cb-text h3 { font-size: 28px; font-weight: 400; margin-bottom: 14px; }
.cb-text p { color: #c3c3c7; }
.cb-text p + p { margin-top: 12px; }
.cb-meta { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gutter); margin: 28px 0; padding: 20px 0; border-top: 1px solid #3a3c42; border-bottom: 1px solid #3a3c42; }
.cb-meta dt { font-size: 12px; letter-spacing: 1.2px; text-transform: uppercase; color: #9a9ba1; margin-bottom: 4px; }
.cb-meta dd { font-weight: 700; word-break: break-word; }
.cb-meta address { font-style: normal; }
.cb-meta a { text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 4px; }

/* ---------- Footer ---------- */
.site-footer { background: #23252a; color: #c9c9cd; font-size: 14px; padding: 56px 0 28px; }
.on-dark + .site-footer, .on-red + .site-footer { border-top: 1px solid #3a3c42; }
.foot-grid { display: grid; grid-template-columns: 5fr 2fr 3fr 3fr; gap: var(--gutter); }
.foot-brand strong { display: block; color: #fff; font: 400 24px/1.1 var(--font-head); font-stretch: condensed; margin-bottom: 12px; }
.foot-brand p { max-width: 30em; }
.site-footer h2 { font: 700 12px/1.3 var(--font); letter-spacing: 1.2px; text-transform: uppercase; color: #fff; margin-bottom: 10px; }
.site-footer li a, .site-footer address a { text-decoration: none; display: inline-block; padding: 3px 0; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.site-footer address { font-style: normal; }
.site-footer address a { word-break: break-word; }
.foot-bottom { margin-top: 44px; padding-top: 18px; border-top: 1px solid #3a3c42; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12px; color: #9a9ba1; }

/* =========================================================
   INNER PAGES — shared
   ========================================================= */
.crumbs { padding: 22px 0 0; font-size: 13px; color: var(--muted); }
.crumbs ol { display: flex; flex-wrap: wrap; gap: 6px; }
.crumbs li + li::before { content: "/"; margin-right: 6px; color: #b5afa4; }
.crumbs a { text-decoration: none; }
.crumbs a:hover { color: var(--accent); text-decoration: underline; }
.crumbs [aria-current] { color: var(--text); font-weight: 700; }
.block { padding: 22px 0 88px; }
.block-head { margin-bottom: 36px; align-items: start; }
.block-head > div, .block-head > h2 { grid-column: 1 / span 5; }
.block-head > div h2 { margin-top: 14px; }
.block-head > p { grid-column: 7 / span 6; color: var(--muted); }

/* ---------- Capabilities overview ---------- */
.cat-intro { padding: 56px 0 72px; align-items: start; }
.cat-intro h1 { grid-column: 1 / span 6; }
.cat-intro .lead { grid-column: 8 / span 5; padding-top: 10px; }
.cat-main { padding-bottom: 24px; align-items: start; }
.cat-list { grid-column: 1 / span 5; }
.cat-list > h2 { margin-bottom: 26px; }
.quad { display: grid; grid-template-columns: 1fr 1fr; gap: 36px var(--gutter); }
.quad li { display: grid; grid-template-columns: auto 1fr; gap: 4px 14px; align-content: start; }
.quad .num { font-size: 46px; grid-row: span 4; }
.quad h3 { font-size: 17px; }
.quad .tag { font-size: 11px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; color: var(--muted); }
.quad p { font-size: 14px; color: var(--muted); }
.cat-main > .photo { grid-column: 7 / span 6; }
.cat-strip { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 12px; padding-bottom: 96px; }
.cat-strip .photo.wide { aspect-ratio: auto; }

.layer-band { padding: 0 0 8px; }
.layer-band > .block-head { padding-top: 22px; }
.lb { padding: 36px 0; border-top: 1px solid var(--rule); align-items: start; }
.lb:last-child { border-bottom: 1px solid var(--rule); }
.lb-key { grid-column: 1 / span 3; }
.lb-key .num { font-size: 88px; display: block; margin-bottom: 10px; }
.lb-key h3 { font-size: 28px; font-weight: 400; }
.lb-key p { font-size: 14px; color: var(--muted); margin-top: 8px; }
.lb-caps { grid-column: 5 / span 8; display: grid; gap: 28px; }
.lb-cap { display: grid; grid-template-columns: 5fr 4fr; gap: var(--gutter); }
.lb-cap + .lb-cap { padding-top: 28px; border-top: 1px dashed var(--rule); }
.lb-cap h4 { font: 700 18px/1.25 var(--font); margin-bottom: 8px; }
.lb-cap h4 a { text-decoration: none; }
.lb-cap h4 a:hover { color: var(--accent); text-decoration: underline; }
.lb-cap p { font-size: 15px; color: var(--muted); }
.lb-cap .sub { font-size: 12px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; display: block; margin-bottom: 8px; }
.ticks li { position: relative; padding: 3px 0 3px 16px; font-size: 14px; }
.ticks li::before { content: ""; position: absolute; left: 0; top: .7em; width: 6px; height: 6px; background: var(--accent); }

.cat-start { padding: 22px 0 96px; margin-top: 88px; align-items: start; }
.cat-start > h2 { grid-column: 1 / span 3; }
.cat-start > .photo { grid-column: 4 / span 3; }
.cat-start .opt { grid-column: span 3; }
.cat-start .opt .num { font-size: 40px; display: block; margin-bottom: 10px; }
.cat-start .opt h3 { margin-bottom: 8px; }
.cat-start .opt p { font-size: 15px; color: var(--muted); }
.cat-start .opt .btn { margin-top: 20px; }

/* ---------- Capability detail ---------- */
.det-head { padding: 44px 0 56px; align-items: end; }
.det-head .det-title { grid-column: 1 / span 8; }
.det-head .det-title .label { margin-bottom: 22px; }
.det-head .det-title .lead { margin-top: 26px; max-width: 34em; }
.stack { grid-column: 10 / span 3; border-top: 4px solid var(--text); }
.stack .sub { display: block; font-size: 12px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; padding: 10px 0; color: var(--muted); }
.stack li { border-top: 1px solid var(--rule); }
.stack li a, .stack li span { display: grid; grid-template-columns: 28px 1fr; gap: 8px; padding: 9px 0; font-size: 14px; text-decoration: none; }
.stack li a:hover { color: var(--accent); }
.stack li b { color: var(--muted); font-weight: 700; font-size: 12px; padding-top: 2px; }
.stack li [aria-current] { font-weight: 700; color: var(--accent); }
.stack li [aria-current] b { color: var(--accent); }
.det-feature { padding-bottom: 96px; align-items: stretch; }
.det-feature .photo { grid-column: 1 / span 5; }
.det-claim { grid-column: 6 / span 7; background: var(--paper); padding: clamp(24px, 3.4vw, 48px); display: flex; flex-direction: column; justify-content: space-between; gap: 28px; }
.det-claim .statement-text { font-size: clamp(28px, 2.9vw, 42px); color: var(--text); max-width: 14em; }
.det-claim dl { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gutter); font-size: 15px; border-top: 1px solid var(--text); padding-top: 16px; }
.det-claim dt { font-weight: 700; margin-bottom: 4px; }
.det-claim dd { color: var(--muted); }
.det-scen { padding: 22px 0 88px; }
.det-scen .block-head { margin-bottom: 28px; }
.scen-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--gutter); }
.scen-row li { padding: 22px 22px 26px; background: var(--ink); color: #fff; }
.scen-row li:first-child { background: var(--accent); }
.scen-row .num { color: #fff; font-size: 44px; display: block; margin-bottom: 22px; opacity: .9; }
.scen-row h3 { margin-bottom: 8px; }
.scen-row p { font-size: 15px; color: rgba(255,255,255,.82); }
.det-scope { padding: 22px 0 88px; align-items: start; }
.det-scope > header { grid-column: 1 / span 4; position: sticky; top: 100px; }
.det-scope > header h2 { margin: 14px 0 14px; }
.det-scope > header p { color: var(--muted); font-size: 15px; }
.scope { grid-column: 6 / span 7; counter-reset: sc; }
.scope li { counter-increment: sc; display: grid; grid-template-columns: 52px 1fr 1.3fr; gap: var(--gutter); padding: 18px 0; border-bottom: 1px solid var(--rule); align-items: baseline; }
.scope li:first-child { border-top: 1px solid var(--text); }
.scope li::before { content: counter(sc, decimal-leading-zero); color: var(--accent); font-weight: 700; font-size: 13px; }
.scope h3 { font-size: 18px; }
.scope p { font-size: 15px; color: var(--muted); }
.det-engage { padding: 22px 0 88px; }
.det-engage .track li::before { font-size: 40px; }
.det-consult { padding: 56px 0; }
.det-consult .grid { align-items: end; }
.det-consult h2 { grid-column: 1 / span 6; }
.det-consult .dc-text { grid-column: 8 / span 5; }
.det-consult .dc-text p { margin-bottom: 20px; color: rgba(255,255,255,.92); }
.siblings { padding: 64px 0 88px; }
.siblings h2 { margin-bottom: 20px; }
.siblings ul { border-top: 1px solid var(--text); }
.siblings li a { display: grid; grid-template-columns: 64px 1fr 2fr auto; gap: var(--gutter); align-items: center; padding: 16px 0; border-bottom: 1px solid var(--rule); text-decoration: none; }
.siblings li a:hover strong { color: var(--accent); text-decoration: underline; }
.siblings .num { font-size: 36px; }
.siblings strong { font: 700 17px/1.25 var(--font); }
.siblings span.s { font-size: 14px; color: var(--muted); }
.siblings span.arrow { color: var(--accent); font-size: 22px; }
.siblings .back { margin-top: 24px; }

/* ---------- About ---------- */
.ab-head { padding: 56px 0 56px; align-items: end; }
.ab-head .ab-title { grid-column: 1 / span 7; }
.ab-head .ab-title .lead { margin-top: 28px; }
.ab-head .photo { grid-column: 9 / span 4; }
.ab-wide { padding-bottom: 96px; align-items: stretch; }
.ab-wide .photo { grid-column: 1 / span 7; aspect-ratio: 16 / 10; }
.ab-wide .red-block { grid-column: 8 / span 5; }
.ab-wide .red-block .statement-text { font-size: clamp(26px, 2.6vw, 38px); }
.ab-layers > li { display: grid; grid-template-columns: 3fr 4fr 5fr; gap: var(--gutter); padding: 24px 0; border-top: 1px solid var(--rule); align-items: start; }
.ab-layers > li:first-child { border-top: 4px solid var(--accent); }
.ab-layers > li:last-child { border-bottom: 1px solid var(--rule); }
.ab-layers .key { display: flex; gap: 14px; align-items: baseline; }
.ab-layers .num { font-size: 44px; }
.ab-layers .key h3 { font-size: 24px; font-weight: 400; }
.ab-layers p { font-size: 15px; color: var(--muted); }
.ab-layers ul li + li { margin-top: 12px; }
.ab-layers ul p { font-size: 14px; }
.ab-layers ul a { font-weight: 700; text-decoration: none; display: inline-block; padding: 3px 0; }
.ab-layers ul a:hover { color: var(--accent); text-decoration: underline; }
.principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--gutter); }
.principles li { padding-top: 20px; border-top: 1px solid var(--text); }
.principles .num { font-size: 52px; display: block; margin-bottom: 18px; }
.principles h3 { margin-bottom: 8px; }
.principles p { font-size: 15px; color: var(--muted); }
.who { align-items: start; }
.who .h-sub { grid-column: 1 / span 7; }
.who .copy { grid-column: 9 / span 4; font-size: 15px; }
.facts-table { width: 100%; border-collapse: collapse; font-size: 16px; }
.facts-table th, .facts-table td { text-align: left; padding: 16px 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
.facts-table tr:first-child th, .facts-table tr:first-child td { border-top: 1px solid var(--text); }
.facts-table th { width: 32%; font-weight: 700; padding-right: 24px; font-size: 13px; letter-spacing: 1.2px; text-transform: uppercase; }
.facts-table td a { font-weight: 700; color: var(--accent); word-break: break-word; }

/* ---------- Contact ---------- */
.ct-head { padding: 56px 0 48px; align-items: end; }
.ct-head h1 { grid-column: 1 / span 7; }
.ct-head .lead { grid-column: 8 / span 5; }
.ct-main { padding-bottom: 88px; align-items: stretch; }
.ct-email { grid-column: 1 / span 8; background: var(--ink); color: #fff; padding: clamp(24px, 3.4vw, 44px); display: flex; flex-direction: column; gap: 18px; }
.ct-email .addr { font: 400 clamp(24px, 3.2vw, 44px)/1.1 var(--font-head); font-stretch: condensed; word-break: break-word; text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 8px; text-decoration-thickness: 2px; }
.ct-email .addr:hover { text-decoration-thickness: 4px; }
.ct-email p { color: #c3c3c7; }
.copy-status { font-size: 14px; color: #c3c3c7; min-height: 1.4em; }
.ct-side { grid-column: 9 / span 4; display: flex; flex-direction: column; gap: 24px; }
.ct-side .sub { font-size: 12px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.ct-side address { font: 400 26px/1.15 var(--font-head); font-stretch: condensed; }
.prep { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px var(--gutter); counter-reset: p; }
.prep li { counter-increment: p; border-top: 1px solid var(--text); padding-top: 14px; }
.prep li::before { content: counter(p, decimal-leading-zero); display: block; color: var(--accent); font: 400 34px/1 var(--font-head); font-stretch: condensed; margin-bottom: 12px; }
.prep h3 { margin-bottom: 6px; font-size: 18px; }
.prep p { font-size: 15px; color: var(--muted); }
.topics li { display: grid; grid-template-columns: 70px 1fr auto; gap: var(--gutter); padding: 18px 0; border-bottom: 1px solid var(--rule); align-items: center; }
.topics li:first-child { border-top: 1px solid var(--text); }
.topics .num { font-size: 36px; }
.topics .tag { font-size: 11px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; color: var(--muted); }
.topics h3 { font-size: 18px; }
.topics h3 a { text-decoration: none; }
.topics h3 a:hover { color: var(--accent); text-decoration: underline; }
.topics p { font-size: 14px; color: var(--muted); }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1100px) {
  :root { --pad: 32px; }
  .primary-nav ul { gap: 20px; }
  .layers { grid-template-columns: 1fr 1fr; }
  .layers .layer:first-child { grid-column: 1 / -1; }
  .foot-grid { grid-template-columns: 1fr 1fr; row-gap: 32px; }
  .track { grid-template-columns: 1fr 1fr; row-gap: 36px; }
  .lb-cap { grid-template-columns: 1fr; gap: 14px; }
  .cat-start .opt { grid-column: span 6; }
  .cat-start > h2, .cat-start > .photo { grid-column: span 6; }
  .scope li { grid-template-columns: 44px 1fr; }
  .scope li p { grid-column: 2; }
  .ab-layers > li { grid-template-columns: 1fr 1fr; }
  .ab-layers > li ul { grid-column: 2; }
  .siblings li a { grid-template-columns: 56px 1fr auto; }
  .siblings span.s { display: none; }
}

@media (max-width: 860px) {
  :root { --pad: 20px; --gutter: 16px; }
  body { font-size: 16px; }
  .menu-toggle { display: block; }
  .primary-nav {
    position: fixed; inset: 69px 0 0 0; z-index: 99; background: var(--bg);
    flex-direction: column; align-items: stretch; gap: 0; padding: 12px var(--pad) 32px;
    display: none; overflow-y: auto;
  }
  .primary-nav.is-open { display: flex; }
  .primary-nav ul { flex-direction: column; gap: 0; }
  .primary-nav li a { display: block; font: 400 30px/1.1 var(--font-head); font-stretch: condensed; padding: 16px 0; border-bottom: 1px solid var(--rule); }
  .primary-nav a[aria-current="page"] { border-bottom-color: var(--rule); color: var(--accent); }
  .primary-nav .btn { margin-top: 24px; min-height: 52px; font-size: 16px; }
  .header-inner { min-height: 68px; }
  body.menu-open { overflow: hidden; }

  .grid { grid-template-columns: minmax(0, 1fr); }
  .grid > * { grid-column: 1 / -1 !important; grid-row: auto !important; }

  .h-display { font-size: clamp(30px, 8.6vw, 38px); }
  .hero { padding: 36px 0 40px; }
  .hero .label { margin-bottom: 18px; }
  .hero-side { order: 3; border-left: 0; border-top: 1px solid var(--text); padding: 14px 0 0; margin-top: 8px; }
  .hero-lower { margin-top: 20px; }
  .directory, .statement, .use-cases, .about-index, .approach { padding-bottom: 64px; }
  .directory-top { margin-bottom: 28px; gap: 12px; }
  .layers { grid-template-columns: 1fr 1fr; gap: 28px 16px; }
  .layer:first-child .layer-caps { grid-template-columns: 1fr; }
  .layer-head { grid-template-columns: 1fr; }
  .layer-head .num { grid-row: auto; margin-bottom: 6px; }
  .layer-head h3 { font-size: 22px; }
  .board { grid-template-columns: 1fr 1fr; gap: 8px; }
  .board .red-block { grid-column: 1 / -1; order: -1; min-height: 0; }
  .statement-foot { margin-top: 28px; gap: 14px; }
  .uc-body h2 { margin-top: 12px; }
  .scen li { grid-template-columns: 40px 1fr; }
  .scen .num { font-size: 32px; }
  .ai-nav { order: 3; }
  .ai-facts { gap: 16px; }
  .approach-top { gap: 12px; margin-bottom: 28px; }
  .track { grid-template-columns: 1fr; row-gap: 28px; }
  .track li { padding-right: 0; }
  .contact-band { padding: 48px 0 56px; }
  .cb-meta { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }

  .block { padding-bottom: 64px; }
  .block-head { margin-bottom: 24px; gap: 12px; }
  .cat-intro { padding: 32px 0 40px; gap: 18px; }
  .cat-main { gap: 32px; }
  .quad { gap: 26px 16px; }
  .quad li { grid-template-columns: 1fr; }
  .quad .num { grid-row: auto; font-size: 40px; }
  .cat-strip { grid-template-columns: 1fr 1fr; gap: 8px; padding-bottom: 64px; }
  .cat-strip .photo.wide { grid-column: 1 / -1; aspect-ratio: 2 / 1; }
  .lb { padding: 28px 0; gap: 18px; }
  .lb-key .num { font-size: 60px; }
  .cat-start { margin-top: 56px; padding-bottom: 64px; gap: 24px; }

  .det-head { padding: 24px 0 36px; gap: 28px; }
  .det-feature { padding-bottom: 64px; }
  .det-claim dl { grid-template-columns: 1fr; gap: 12px; }
  .det-scen, .det-scope, .det-engage { padding-bottom: 64px; }
  .scen-row { grid-template-columns: 1fr; gap: 8px; }
  .scen-row .num { margin-bottom: 12px; }
  .det-scope > header { position: static; }
  .scope li { grid-template-columns: 36px 1fr; gap: 4px 12px; }
  .det-consult { padding: 40px 0; }
  .det-consult .grid { gap: 18px; }
  .siblings { padding: 48px 0 64px; }
  .siblings li a { grid-template-columns: 44px 1fr auto; gap: 12px; }
  .siblings .num { font-size: 28px; }

  .ab-head, .ct-head { padding: 32px 0 36px; gap: 24px; }
  .ab-wide { padding-bottom: 64px; gap: 8px; }
  .ab-layers > li { grid-template-columns: 1fr; gap: 10px; }
  .ab-layers > li ul { grid-column: 1; }
  .principles { grid-template-columns: 1fr; gap: 28px; }
  .who { gap: 16px; }
  .facts-table th { width: 38%; }
  .ct-main { padding-bottom: 64px; gap: 28px; }
  .prep { grid-template-columns: 1fr; }
  .topics li { grid-template-columns: 48px 1fr; gap: 6px 14px; }
  .topics .num { font-size: 30px; }
  .topics li .btn { grid-column: 2; justify-self: start; }
}

@media (max-width: 420px) {
  .quad { grid-template-columns: 1fr; }
  .facts-table th, .facts-table td { display: block; width: 100%; padding: 4px 0; border: 0 !important; }
  .facts-table tr { display: block; padding: 12px 0; border-bottom: 1px solid var(--rule); }
  .facts-table tr:first-child { border-top: 1px solid var(--text); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}