/* ============================================================
   MAIN — "The Technical Sublime"
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--f-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--bp-ink);
  background: var(--bp-void);
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { font-family: var(--f-display); font-weight: 600; line-height: 0.98; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }

/* FOUT gate: hold display text until webfont ready */
.fonts-pending .fout { opacity: 0; }
.fonts-ready .fout { opacity: 1; transition: opacity 0.5s ease; }

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }

/* mono eyebrow / metadata */
.eyebrow {
  font-family: var(--f-mono); font-size: var(--fs-mono);
  letter-spacing: 0.14em; text-transform: uppercase; font-weight: 500;
  display: inline-flex; align-items: center; gap: var(--s3);
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; opacity: 0.6; }
.mono { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }

/* ---- Section lighting keys ---- */
.section { position: relative; padding-block: var(--sec-pad); }
.key-blueprint { background: var(--bp-void); color: var(--bp-ink); }
.key-vellum { background: var(--vl-paper); color: var(--vl-ink); }
.key-carbon { background: var(--cb-black); color: var(--cb-bone); }

/* blueprint grid texture */
.bp-grid::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(var(--bp-line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--bp-line-soft) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, #000 55%, transparent 100%);
          mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, #000 55%, transparent 100%);
  opacity: 0.5;
}
.vl-grid::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(var(--vl-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--vl-grid) 1px, transparent 1px);
  background-size: 40px 40px; opacity: 0.35;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 45%, transparent 100%);
          mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 45%, transparent 100%);
}
.section > .container { position: relative; z-index: 1; }

/* ---- Revision seam (threshold between lighting keys) ---- */
.rev-seam {
  display: flex; align-items: center; gap: var(--s4);
  font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.12em;
  text-transform: uppercase; opacity: 0.6; padding-block: var(--s4);
}
.rev-seam .line { flex: 1; height: 1px; background: currentColor; opacity: 0.35; }
.rev-seam .tick { color: var(--red); }

/* section heading block */
.sec-head { max-width: 62ch; margin-bottom: var(--s8); }
.sec-head .eyebrow { margin-bottom: var(--s5); color: var(--red); }
.sec-head h2 { font-size: var(--fs-h2); }
.sec-head .lede { margin-top: var(--s4); font-size: 1.05rem; opacity: 0.72; max-width: 52ch; }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s5); padding: var(--s4) var(--gutter);
  transition: background var(--t-base) var(--e-out), border-color var(--t-base);
  border-bottom: 1px solid transparent;
}
.nav.scrolled,
.nav.nav--solid {
  background: color-mix(in srgb, var(--bp-void) 82%, transparent);
  backdrop-filter: blur(10px) saturate(120%);
  border-bottom: 1px solid var(--bp-line-soft);
}
/* active page marker (uses the existing accent language) */
.nav-links a[aria-current="page"] { color: var(--bp-ink); opacity: 1; }
.nav-links a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -5px; height: 1px; background: var(--red); }
.brand { display: flex; align-items: center; gap: var(--s3); font-family: var(--f-mono); font-size: var(--fs-small); letter-spacing: 0.04em; color: var(--bp-ink); }
.brand .mark {
  width: 28px; height: 28px; border: 1px solid var(--bp-draft); position: relative; flex: none;
  display: grid; place-items: center;
}
.brand .mark::before, .brand .mark::after { content: ""; position: absolute; background: var(--red); }
.brand .mark::before { width: 10px; height: 1.5px; }
.brand .mark::after { width: 1.5px; height: 10px; }
.brand b { font-family: var(--f-display); font-weight: 600; letter-spacing: -0.01em; }
.brand span { opacity: 0.55; }
.nav-links { display: flex; gap: var(--s6); align-items: center; }
.nav-links a { font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.08em; text-transform: uppercase; opacity: 0.7; transition: opacity var(--t-micro); position: relative; }
.nav-links a:hover { opacity: 1; }
.nav-cta {
  font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.08em; text-transform: uppercase;
  border: 1px solid var(--red); color: var(--bp-ink); padding: var(--s2) var(--s4);
  transition: background var(--t-micro), color var(--t-micro);
}
.nav-cta:hover { background: var(--red); color: #fff; }
.nav-burger { display: none; align-items: center; gap: var(--s2); font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--bp-ink); border: 1px solid var(--bp-line); padding: var(--s2) var(--s4); }
.nav-burger::before { content: ""; width: 14px; height: 8px; border-top: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; }

/* Mobile menu overlay */
.mobile-menu {
  position: fixed; inset: 0; z-index: 99; background: color-mix(in srgb, var(--bp-void) 97%, transparent);
  backdrop-filter: blur(8px); display: flex; align-items: center;
  opacity: 0; visibility: hidden; transition: opacity var(--t-base) var(--e-out), visibility var(--t-base);
}
.mobile-menu::before { content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--bp-line-soft) 1px, transparent 1px), linear-gradient(90deg, var(--bp-line-soft) 1px, transparent 1px);
  background-size: 48px 48px; opacity: 0.3; }
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-menu-inner { position: relative; width: 100%; padding: 0 var(--gutter); display: flex; flex-direction: column; gap: var(--s2); }
.mobile-menu-inner a { font-family: var(--f-display); font-weight: 600; font-size: clamp(2rem, 9vw, 3rem); letter-spacing: -0.02em; color: var(--bp-ink); display: flex; align-items: baseline; gap: var(--s4); padding: var(--s3) 0; border-bottom: 1px solid var(--bp-line-soft); transition: color var(--t-micro), padding-left var(--t-micro); }
.mobile-menu-inner a:hover, .mobile-menu-inner a:focus-visible { color: var(--bp-draft); padding-left: var(--s3); }
.mobile-menu-inner .mm-idx { font-family: var(--f-mono); font-size: 0.8rem; color: var(--red); font-weight: 500; }
.mobile-menu-inner .mm-cta { justify-content: center; font-family: var(--f-mono); font-size: var(--fs-small); font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; border-bottom: 0; margin-top: var(--s6); color: #fff; }
body.menu-open { overflow: hidden; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  display: inline-flex; align-items: center; gap: var(--s3);
  font-family: var(--f-mono); font-size: var(--fs-small); letter-spacing: 0.06em; text-transform: uppercase;
  background: var(--red); color: #fff; padding: var(--s4) var(--s6);
  transition: transform var(--t-micro) var(--e-out), background var(--t-micro);
  position: relative;
}
.btn-primary:hover { background: var(--red-deep); transform: translateY(-2px); }
.btn-primary .arrow { transition: transform var(--t-base) var(--e-out); }
.btn-primary:hover .arrow { transform: translateX(5px); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: var(--s3);
  font-family: var(--f-mono); font-size: var(--fs-small); letter-spacing: 0.06em; text-transform: uppercase;
  border: 1px solid currentColor; padding: var(--s4) var(--s6); opacity: 0.85;
  transition: opacity var(--t-micro), background var(--t-micro);
}
.btn-ghost:hover { opacity: 1; background: color-mix(in srgb, currentColor 8%, transparent); }

/* ============================================================
   01 · HERO
   ============================================================ */
.hero { position: relative; min-height: 100svh; background: var(--bp-void); overflow: hidden; display: flex; flex-direction: column; }
.hero-photo {
  position: absolute; inset: 0; z-index: 0; object-fit: cover; width: 100%; height: 100%;
  opacity: 0.5; filter: grayscale(0.15) contrast(1.08) brightness(0.82) saturate(1.05);
  -webkit-mask-image: radial-gradient(ellipse 82% 92% at 78% 52%, #000 0%, rgba(0,0,0,0.55) 46%, transparent 82%);
          mask-image: radial-gradient(ellipse 82% 92% at 78% 52%, #000 0%, rgba(0,0,0,0.55) 46%, transparent 82%);
}
/* cyanotype wash so the photo belongs to the blueprint world */
.hero-photo-wash { position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(90deg, var(--bp-void) 30%, color-mix(in srgb, var(--bp-void) 30%, transparent) 78%),
              linear-gradient(180deg, transparent 55%, var(--bp-void) 100%);
  mix-blend-mode: normal; }
.hero-grid {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background-image:
    linear-gradient(var(--bp-line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--bp-line-soft) 1px, transparent 1px);
  background-size: 54px 54px; opacity: 0.42;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 72%, transparent 100%);
          mask-image: linear-gradient(180deg, #000 0%, #000 72%, transparent 100%);
}
/* content zone — grows to fill; centered content, clear of the map band below */
.hero-inner {
  position: relative; z-index: 3; width: 100%; max-width: 1460px;
  margin-inline: auto; padding: 112px var(--gutter) var(--s7);
  flex: 1 1 auto; display: flex; flex-direction: column; justify-content: center;
}
/* system-map zone — its own row, aligned to the content width */
.hero-map {
  position: relative; z-index: 2; width: 100%; max-width: 1460px;
  margin-inline: auto; padding: 0 var(--gutter) var(--s5);
}
.hero-map .hero-svg { position: relative; z-index: 2; width: 100%; height: auto; display: block; overflow: visible; }
.hero-map-cue {
  display: block; font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--bp-draft); opacity: 0.7; margin-bottom: var(--s4);
}
@media (min-width: 1680px) { .hero h1 { font-size: clamp(6rem, 8.6vw, 9.5rem); } .hero-sub { max-width: 52ch; } }
/* short viewports (laptops ~768/800 tall): shrink hero content so nothing dips below the fold */
@media (max-height: 860px) and (min-width: 901px) {
  .hero-inner { padding-top: 88px; padding-bottom: var(--s5); }
  .hero h1 { font-size: clamp(2.6rem, 6.2vw, 4.4rem); }
  .hero-sub { margin-top: var(--s5); max-width: 50ch; }
  .hero-actions { margin-top: var(--s6); }
  .hero-meta { margin-top: var(--s6); }
}
.hero-eyebrow { color: var(--bp-draft); margin-bottom: var(--s5); }
.hero-eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan-live); box-shadow: 0 0 10px var(--cyan-live); }
.hero h1 {
  font-size: var(--fs-mega); font-weight: 600; letter-spacing: -0.035em; line-height: 0.92;
  max-width: 15ch; text-wrap: balance;
}
.hero h1 .accent { color: var(--bp-draft); position: relative; }
.hero h1 .accent::after {
  /* callout underline mark */
  content: ""; position: absolute; left: 0; bottom: 0.06em; width: 100%; height: 2px;
  background: var(--red); transform-origin: left; transform: scaleX(0);
}
.fonts-ready .hero h1 .accent::after { animation: drawline 0.7s var(--e-out) 1.1s forwards; }
@keyframes drawline { to { transform: scaleX(1); } }
.hero-sub { margin-top: var(--s6); max-width: 46ch; font-size: 1.14rem; color: color-mix(in srgb, var(--bp-ink) 82%, transparent); }
.hero-actions { margin-top: var(--s7); display: flex; gap: var(--s4); flex-wrap: wrap; align-items: center; }
.hero-meta { margin-top: var(--s7); display: flex; gap: var(--s7); flex-wrap: wrap; align-items: baseline; }
.hero-meta span { font-family: var(--f-body); font-size: 0.95rem; color: color-mix(in srgb, var(--bp-ink) 70%, transparent); display: inline-flex; gap: 0.5ch; align-items: baseline; }
.hero-meta b { font-family: var(--f-display); font-weight: 600; font-size: 1.5rem; color: var(--bp-ink); letter-spacing: -0.01em; }

/* hero title-block strip (bottom) */
.hero-titleblock {
  position: relative; z-index: 3; width: 100%; flex: 0 0 auto;
  display: flex; gap: 0; border-top: 1px solid var(--bp-line);
  font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--bp-draft); background: color-mix(in srgb, var(--bp-void) 70%, transparent); backdrop-filter: blur(4px);
}
.hero-titleblock div { padding: var(--s3) var(--gutter); border-right: 1px solid var(--bp-line-soft); white-space: nowrap; }
.hero-titleblock div:last-child { border-right: 0; margin-left: auto; color: var(--red); }
.hero-titleblock b { color: var(--bp-ink); }

/* Hero-specific: brighter, thicker line-work so the schematic reads as content, not wallpaper */
.hero-svg .trace { stroke: #5FA0BC; stroke-width: 2.2; }
.hero-svg .node-ring { stroke: #4E88A0; }
.hero-svg .node-dot { fill: var(--bp-surface-2); stroke: #B7DBE8; stroke-width: 2; }
.hero-svg .node-label { fill: #BBDCEA; font-size: 12px; }
.hero-svg .hnode[data-k="web"] .node-dot { fill: var(--cyan-live); stroke: var(--cyan-live); }
/* live focal node = the WEB request target */
.hero-pulse { fill: none; stroke: var(--cyan-live); stroke-width: 1.5; transform-box: fill-box; transform-origin: center; transform: scale(1); }
.fonts-ready .hero-pulse { animation: nodepulse 3s var(--e-out) infinite; }
@keyframes nodepulse { 0% { transform: scale(1); opacity: 0.9; } 70%, 100% { transform: scale(2.6); opacity: 0; } }

/* SVG node styling (shared) */
.node-dot { fill: var(--bp-surface); stroke: var(--bp-draft); stroke-width: 1.5; }
.node-dot.active { stroke: var(--cyan-live); }
.node-ring { fill: none; stroke: var(--bp-line); stroke-width: 1; }
.trace { fill: none; stroke: var(--bp-line); stroke-width: 1.5; }
.trace-live { stroke: var(--cyan-live); filter: drop-shadow(0 0 4px color-mix(in srgb, var(--cyan-live) 60%, transparent)); }
.node-label { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.1em; fill: var(--bp-draft); text-transform: uppercase; }
.leader { stroke: var(--red); stroke-width: 1.25; fill: none; stroke-dasharray: 3 3; }

/* scroll cue */
.scroll-cue {
  position: absolute; bottom: 58px; left: 50%; transform: translateX(-50%); z-index: 4;
  font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--bp-draft); display: flex; flex-direction: column; align-items: center; gap: var(--s2); opacity: 0.8;
}
.scroll-cue .bar { width: 1px; height: 34px; background: linear-gradient(var(--bp-draft), transparent); }

/* ============================================================
   02 · AT A GLANCE  (blueprint domain drawing)
   ============================================================ */
.glance-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border: 1px solid var(--bp-line-soft); border-radius: 2px;
  background:
    linear-gradient(var(--bp-line-soft) 1px, transparent 1px) 0 0 / 100% 33.33%,
    var(--bp-surface);
}
.domain {
  position: relative; padding: var(--s7) var(--s5); min-height: 210px;
  border-right: 1px solid var(--bp-line-soft); border-bottom: 1px solid var(--bp-line-soft);
  cursor: pointer; overflow: hidden; transition: background var(--t-base) var(--e-out);
}
.domain:hover, .domain.open { background: var(--bp-surface-2); }
.domain .num { font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--bp-draft); opacity: 0.6; }
.domain h3 { font-size: 1.35rem; margin-top: var(--s5); letter-spacing: -0.01em; }
.domain .glyph { position: absolute; top: var(--s5); right: var(--s5); width: 30px; height: 30px; color: var(--bp-draft); opacity: 0.6; transition: color var(--t-base), opacity var(--t-base); }
.domain:hover .glyph, .domain.open .glyph { color: var(--red); opacity: 1; }
/* L1 is always visible at rest (no empty cards); hover/open reveals the L3 specs */
.domain .l1 { margin-top: var(--s4); font-size: 0.95rem; color: color-mix(in srgb, var(--bp-ink) 74%, transparent); max-width: 30ch; }
.domain .l3 { margin-top: var(--s4); display: flex; flex-wrap: wrap; gap: var(--s2); max-height: 0; opacity: 0; overflow: hidden; transition: max-height var(--t-slow) var(--e-out), opacity var(--t-slow), margin var(--t-slow); margin-top: 0; }
.domain:hover .l3, .domain.open .l3 { max-height: 90px; opacity: 1; margin-top: var(--s4); }
.chip { font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.06em; padding: 3px 7px; border: 1px solid var(--bp-line); color: var(--bp-draft); border-radius: 2px; }
.domain .expand { position: absolute; bottom: var(--s4); left: var(--s5); font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--red); opacity: 0; transition: opacity var(--t-base); }
.domain:hover .expand { opacity: 0.9; }

/* ============================================================
   03 · WHAT I SOLVE  (vellum editorial)
   ============================================================ */
.solve-list { border-top: 1px solid var(--vl-line); }
.solve-row {
  position: relative; display: grid; grid-template-columns: 64px 1fr 38%; align-items: center; gap: var(--s6);
  padding: var(--s8) var(--s5) var(--s8) var(--s6); border-bottom: 1px solid var(--vl-line);
  transition: background var(--t-base) var(--e-out);
}
/* red diagnostic accent bar grows on hover */
.solve-row::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--red); transform: scaleY(0); transform-origin: center; transition: transform var(--t-base) var(--e-out); }
.solve-row:hover { background: color-mix(in srgb, var(--vl-ink) 4%, transparent); }
.solve-row:hover::before { transform: scaleY(1); }
.solve-row .idx { font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--red); letter-spacing: 0.06em; align-self: start; padding-top: 0.4em; }
.solve-row .q { font-family: var(--f-display); font-weight: 600; font-size: clamp(1.7rem, 3.6vw, 3.05rem); letter-spacing: -0.025em; color: var(--vl-ink); line-height: 1.0; }
.solve-row .a { font-size: 1.02rem; line-height: 1.5; color: var(--vl-ink-soft); align-self: center; padding-left: var(--s5); border-left: 1px solid var(--vl-line); }
.solve-row:hover .q { color: var(--red-deep); }

/* ============================================================
   04 · TRACE THE SYSTEM  (scrollytelling)
   ============================================================ */
.trace-wrap { position: relative; background: var(--bp-void); color: var(--bp-ink); }
/* full-height faint grid (override the masked bp-grid so deep steps aren't undifferentiated black) */
.trace-wrap.bp-grid::before { -webkit-mask-image: none; mask-image: none; opacity: 0.16; background-size: 54px 54px; }
.trace-cols { display: grid; grid-template-columns: 42% 1fr; gap: var(--gutter); }
.trace-steps { padding-block: 8vh; padding-left: var(--s7); position: relative; }
/* persistent progress rail so no step frame sits in an empty void */
.trace-steps::before { content: ""; position: absolute; left: 5px; top: 8vh; bottom: 8vh; width: 1px; background: linear-gradient(var(--bp-line-soft), var(--bp-line) 30%, var(--bp-line) 70%, var(--bp-line-soft)); }
.trace-step { position: relative; min-height: 52vh; display: flex; flex-direction: column; justify-content: center; opacity: 0.4; transition: opacity var(--t-slow) var(--e-out); }
.trace-step::before { content: ""; position: absolute; left: 0; top: 50%; width: 12px; height: 12px; border-radius: 50%; border: 1px solid var(--bp-line); background: var(--bp-void); transform: translate(-5.5px, -50%); transition: border-color var(--t-base), background var(--t-base), box-shadow var(--t-base); }
.trace-step.active::before { border-color: var(--cyan-live); background: var(--cyan-live); box-shadow: 0 0 10px color-mix(in srgb, var(--cyan-live) 70%, transparent); }
.trace-step.active { opacity: 1; }
.trace-step h3 { color: var(--bp-ink); }
.trace-step .hop { font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--red); margin-bottom: var(--s4); display: flex; gap: var(--s3); align-items: center; }
.trace-step .hop .n { color: var(--bp-draft); }
.trace-step h3 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); letter-spacing: -0.02em; }
.trace-step p { margin-top: var(--s4); max-width: 40ch; color: color-mix(in srgb, var(--bp-ink) 78%, transparent); }
.trace-step .l3 { margin-top: var(--s5); font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.04em; color: var(--bp-draft); border-left: 2px solid var(--bp-line); padding-left: var(--s4); }
.trace-sticky { position: sticky; top: 0; height: 100svh; display: flex; align-items: center; }
.trace-sticky svg { width: 100%; height: 82%; }
.trace-caption { position: absolute; left: 0; right: 0; bottom: 8vh; text-align: center; font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--bp-draft); opacity: 0; transition: opacity var(--t-slow); }
.trace-caption.show { opacity: 0.85; }

/* ============================================================
   05 · INFRASTRUCTURE EXPERIENCE  (carbon strata + annotated photo)
   ============================================================ */
.exp { position: relative; }
.exp-figure { position: relative; margin-top: var(--s8); border: 1px solid var(--cb-line); overflow: hidden; background: #000; }
.exp-figure img { width: 100%; height: clamp(360px, 60vh, 640px); object-fit: cover; filter: grayscale(0.2) contrast(1.06) brightness(0.9) saturate(1.05); }
.exp-figure::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(180deg, transparent 55%, color-mix(in srgb, var(--cb-black) 60%, transparent) 100%); }
.exp-figure .overlay { position: absolute; inset: 0; pointer-events: none; }
.anno-label {
  position: absolute; font-family: var(--f-mono); font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--cb-bone); background: color-mix(in srgb, var(--cb-black) 55%, transparent);
  border-left: 2px solid var(--red); padding: 4px 8px; backdrop-filter: blur(2px);
}
.anno-label .v { color: var(--cyan-live); }
.exp-strata { margin-top: var(--s8); display: grid; gap: 0; border-top: 1px solid var(--cb-line); }
.strata-row { display: grid; grid-template-columns: 180px 1fr auto; gap: var(--s5); align-items: center; padding: var(--s5) 0; border-bottom: 1px solid var(--cb-line); transition: background var(--t-base); }
.strata-row:hover { background: var(--cb-surface); }
.strata-row .layer { font-family: var(--f-display); font-weight: 600; font-size: 1.15rem; letter-spacing: -0.01em; }
.strata-row .desc { color: var(--cb-bone-soft); font-size: 0.98rem; }
.strata-row .tag { font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--bp-draft); letter-spacing: 0.06em; }

/* ============================================================
   06 · SERVICES  (vellum editorial list, expandable)
   ============================================================ */
.svc-list { border-top: 1px solid var(--vl-line); }
.svc { border-bottom: 1px solid var(--vl-line); }
.svc-head { display: grid; grid-template-columns: 64px 1fr auto; gap: var(--s5); align-items: center; padding: var(--s6) 0; cursor: pointer; transition: padding-left var(--t-base) var(--e-out); }
.svc:hover .svc-head { padding-left: var(--s4); }
.svc-head .sid { font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--red); }
.svc-head .name { font-family: var(--f-display); font-weight: 500; font-size: clamp(1.4rem, 2.6vw, 2.2rem); letter-spacing: -0.02em; color: var(--vl-ink); }
.svc-head .promise { grid-column: 2; font-size: 0.98rem; color: var(--vl-ink-soft); margin-top: 2px; }
.svc-head .plus { width: 26px; height: 26px; position: relative; }
.svc-head .plus::before, .svc-head .plus::after { content: ""; position: absolute; background: var(--vl-ink); transition: transform var(--t-base) var(--e-out); }
.svc-head .plus::before { top: 50%; left: 0; width: 100%; height: 1.5px; transform: translateY(-50%); }
.svc-head .plus::after { left: 50%; top: 0; height: 100%; width: 1.5px; transform: translateX(-50%); }
.svc.open .plus::after { transform: translateX(-50%) scaleY(0); }
.svc-body { max-height: 0; overflow: hidden; transition: max-height var(--t-slow) var(--e-inout); }
.svc.open .svc-body { max-height: 260px; }
.svc-body-inner { padding: 0 0 var(--s6) 64px; display: grid; grid-template-columns: 1fr auto; gap: var(--s6); align-items: start; }
.svc-body .l2 { max-width: 60ch; color: var(--vl-ink); }
.svc-body .l3 { display: flex; flex-wrap: wrap; gap: var(--s2); justify-content: flex-end; max-width: 320px; }
.svc-body .l3 .chip { color: var(--vl-ink-soft); border-color: var(--vl-line); }

/* ============================================================
   07 · CASE STUDIES  (carbon pinboard)
   ============================================================ */
.case { display: grid; grid-template-columns: 1.15fr 1fr; gap: var(--s8); align-items: stretch; }
.case-figure { position: relative; border: 1px solid var(--cb-line); overflow: hidden; min-height: 380px; background: #000; }
.case-figure img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; filter: grayscale(0.15) contrast(1.05) brightness(0.86) saturate(1.05); }
.case-figure .revblock { position: absolute; bottom: 0; left: 0; right: 0; font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--bp-draft); background: color-mix(in srgb, var(--cb-black) 68%, transparent); border-top: 1px solid var(--cb-line); padding: var(--s3) var(--s4); display: flex; justify-content: space-between; }
.case-body .placeholder-tag { color: var(--red); }
.case-steps { margin-top: var(--s6); display: grid; gap: 0; }
.case-steps .cs { display: grid; grid-template-columns: 120px 1fr; gap: var(--s5); padding: var(--s4) 0; border-top: 1px solid var(--cb-line); }
.case-steps .cs .k { font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--bp-draft); }
.case-steps .cs .val { color: var(--cb-bone); }
.metrics { display: flex; gap: var(--s7); margin-top: var(--s7); flex-wrap: wrap; }
.metric .big { font-family: var(--f-display); font-weight: 600; font-size: clamp(2.2rem, 4vw, 3.4rem); color: var(--cyan-live); letter-spacing: -0.02em; }
.metric .lbl { font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--cb-bone-soft); margin-top: var(--s2); }

/* ============================================================
   08 · TECHNOLOGY ECOSYSTEM  (blueprint constellation)
   ============================================================ */
.eco { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s6); margin-top: var(--s8); }
.eco-cluster { border: 1px solid var(--bp-line-soft); padding: var(--s6); background: color-mix(in srgb, var(--bp-surface) 60%, transparent); transition: border-color var(--t-base), background var(--t-base); }
.eco-cluster:hover { border-color: var(--bp-draft); background: var(--bp-surface); }
.eco-cluster .clabel { font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--red); }
.eco-tags { margin-top: var(--s5); display: flex; flex-wrap: wrap; gap: var(--s3); }
.eco-tags span { font-family: var(--f-mono); font-size: 0.82rem; color: var(--bp-ink); padding: var(--s2) var(--s3); border: 1px solid var(--bp-line); border-radius: 2px; transition: color var(--t-micro), border-color var(--t-micro); }
.eco-tags span:hover { color: var(--cyan-live); border-color: var(--cyan-live); }

/* ============================================================
   09 · PROCESS  (vellum survey line)
   ============================================================ */
.process-line { position: relative; margin-top: var(--s9); }
.process-track { position: absolute; top: 11px; left: 0; right: 0; height: 1px; background: var(--vl-line); }
.process-track .fill { position: absolute; left: 0; top: 0; height: 1px; width: 0; background: var(--red); }
.process-stations { display: grid; grid-template-columns: repeat(7, 1fr); gap: var(--s4); position: relative; }
.station .tick { width: 22px; height: 22px; border: 1px solid var(--vl-ink); border-radius: 50%; display: grid; place-items: center; background: var(--vl-paper); position: relative; }
.station .tick::after { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--red); transform: scale(0); transition: transform var(--t-base) var(--e-out); }
.station.on .tick::after { transform: scale(1); }
.station .no { font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--vl-ink-soft); margin-top: var(--s4); }
.station h4 { font-family: var(--f-display); font-weight: 600; font-size: 1.1rem; margin-top: var(--s2); color: var(--vl-ink); letter-spacing: -0.01em; }
.station p { margin-top: var(--s2); font-size: 0.86rem; color: var(--vl-ink-soft); max-width: 22ch; }

/* ============================================================
   10 · FINAL CTA
   ============================================================ */
.cta { position: relative; overflow: hidden; text-align: center; }
.cta-photo { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.28; filter: grayscale(0.6) contrast(1.1) brightness(0.5); -webkit-mask-image: radial-gradient(ellipse 80% 90% at 50% 40%, #000, transparent 78%); mask-image: radial-gradient(ellipse 80% 90% at 50% 40%, #000, transparent 78%); }
.cta .container { position: relative; z-index: 2; }
.cta h2 { font-size: clamp(2.4rem, 6vw, 5rem); letter-spacing: -0.03em; max-width: 18ch; margin-inline: auto; text-wrap: balance; }
.cta .sub { margin-top: var(--s5); font-size: 1.2rem; color: var(--cb-bone-soft); }
.cta .btn-primary { margin-top: var(--s8); }
.cta .pulse-dot { display: inline-flex; align-items: center; gap: var(--s3); margin-top: var(--s8); font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--cb-bone-soft); }
.cta .pulse-dot i { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan-live); box-shadow: 0 0 12px var(--cyan-live); animation: heartbeat 3.2s ease-in-out infinite; }
@keyframes heartbeat { 0%,100% { opacity: 0.3; transform: scale(0.8); } 8% { opacity: 1; transform: scale(1.25); } 16% { opacity: 0.4; transform: scale(0.9); } 24% { opacity: 0.9; transform: scale(1.1); } 32% { opacity: 0.3; transform: scale(0.8); } }

/* ============================================================
   FOOTER
   ============================================================ */
.foot { background: var(--cb-black); color: var(--cb-bone-soft); border-top: 1px solid var(--cb-line); }
.foot .container { display: flex; flex-wrap: wrap; gap: var(--s5); justify-content: space-between; align-items: center; padding-block: var(--s7); }
.foot .tb { display: flex; flex-wrap: wrap; gap: var(--s6); font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.06em; text-transform: uppercase; }
.foot .tb b { color: var(--cb-bone); }
.foot a:hover { color: var(--red); }
/* footer navigation (global, all pages) */
.foot .container { row-gap: var(--s6); }
.foot-nav { flex-basis: 100%; display: flex; flex-wrap: wrap; gap: var(--s6); font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.08em; text-transform: uppercase; padding-bottom: var(--s6); border-bottom: 1px solid var(--cb-line); }
.foot-nav a { color: var(--cb-bone-soft); }
.foot-nav a:hover { color: var(--red); }
.foot-nav a[aria-current="page"] { color: var(--cb-bone); }

/* ============================================================
   REVEAL (scroll-in) util
   ============================================================ */
.reveal { opacity: 0; transform: translateY(24px); }
.fonts-ready .reveal.in { opacity: 1; transform: none; transition: opacity 0.7s var(--e-out), transform 0.7s var(--e-out); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .glance-grid { grid-template-columns: repeat(2, 1fr); }
  .eco { grid-template-columns: repeat(2, 1fr); }
  .case { grid-template-columns: 1fr; }
}

/* ---- tablet & below: collapse nav, drop the landscape hero topology ---- */
@media (max-width: 900px) {
  .nav-links, .nav-cta { display: none; }
  .nav-burger { display: inline-flex; }
  .brand span { display: none; }
  .nav { padding-block: var(--s3); }

  /* hero: photo carries it; the landscape spine collides with copy at portrait */
  .hero-map { display: none; }
  .hero-photo { opacity: 0.44; filter: grayscale(0.18) contrast(1.06) brightness(0.78) saturate(1.02);
    -webkit-mask-image: radial-gradient(ellipse 130% 70% at 72% 40%, #000 0%, rgba(0,0,0,.4) 55%, transparent 90%);
            mask-image: radial-gradient(ellipse 130% 70% at 72% 40%, #000 0%, rgba(0,0,0,.4) 55%, transparent 90%); }
  /* stronger wash so headline stays crisp over the photo */
  .hero-photo-wash { background:
      linear-gradient(180deg, var(--bp-void) 6%, color-mix(in srgb, var(--bp-void) 62%, transparent) 46%, color-mix(in srgb, var(--bp-void) 30%, transparent) 78%, var(--bp-void) 100%),
      linear-gradient(90deg, var(--bp-void) 40%, color-mix(in srgb, var(--bp-void) 20%, transparent) 82%); }
  .hero-inner { padding-top: 96px; }
  .hero-meta { gap: var(--s6); }

  /* Trace: stack (schematic pins above the steps) */
  .trace-cols { grid-template-columns: 1fr; }
  .trace-sticky { position: sticky; top: 54px; height: 40vh; background: color-mix(in srgb, var(--bp-void) 88%, transparent); backdrop-filter: blur(2px); z-index: 5; margin-inline: calc(-1 * var(--gutter)); padding-inline: var(--gutter); }
  .trace-sticky svg { height: 100%; }
  .trace-caption { display: none; }
  .trace-step { min-height: 52vh; }
}

@media (max-width: 760px) {
  .hero-inner { padding-top: 88px; }
  .hero h1 { font-size: clamp(2.6rem, 12vw, 4rem); }
  .hero-titleblock { display: none; }
  .scroll-cue { display: none; }
  .glance-grid { grid-template-columns: 1fr; }
  .domain { min-height: auto; padding-block: var(--s6); }
  .domain .l1 { max-height: 200px; opacity: 1; margin-top: var(--s4); }
  .domain .expand { display: none; }
  .eco { grid-template-columns: 1fr; }
  .solve-row { grid-template-columns: 40px 1fr; }
  .solve-row .a { grid-column: 2; margin-top: var(--s3); }
  .strata-row { grid-template-columns: 1fr; gap: var(--s2); }
  .svc-head { grid-template-columns: 44px 1fr auto; }
  .svc-head .name { font-size: clamp(1.3rem, 5.5vw, 1.7rem); }
  .svc-body-inner { grid-template-columns: 1fr; padding-left: 0; }
  .svc-body .l3 { justify-content: flex-start; }
  .process-stations { grid-template-columns: 1fr; gap: var(--s6); }
  .process-track { display: none; }
  .metrics { gap: var(--s5); }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  .fonts-ready .hero h1 .accent::after { transform: scaleX(1); animation: none; }
  .cta .pulse-dot i { animation: none; opacity: 0.7; }
}