/* ═══════════════════════════════════════════════════════════
   Frontier Forge Technologies — Design System
   Dark · Precise · Systems-grade
   ═══════════════════════════════════════════════════════════ */
:root {
  --bg-void: #050507;
  --bg-deep: #08080b;
  --bg-surface: #0c0c10;
  --bg-elevated: #111116;
  --bg-panel: #0e0e13;
  --border: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.1);
  --text-primary: #f4f4f5;
  --text-secondary: #a8a8b0;
  --text-muted: #8e8e98;
  --text-dim: #80808a;
  --silver: #c8c8d0;
  --accent: #7a8fa8;
  --accent-soft: rgba(122, 143, 168, 0.15);
  --accent-glow: rgba(122, 143, 168, 0.35);
  --line: rgba(200, 200, 210, 0.08);
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --nav-h: 72px;
  --section-pad: clamp(4rem, 8vw, 6.5rem);
  --content: 1120px;
  --content-wide: 1280px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-void);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  font-weight: 400;
  font-size: 16px;
}

::selection {
  background: rgba(122, 143, 168, 0.35);
  color: var(--text-primary);
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; color: inherit; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ─── Layout ─── */
.wrap {
  width: min(100% - 2.5rem, var(--content));
  margin-inline: auto;
}
.wrap-wide {
  width: min(100% - 2.5rem, var(--content-wide));
  margin-inline: auto;
}

/* ─── Nav ─── */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background 0.4s var(--ease-soft), border-color 0.4s, backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(5, 5, 7, 0.82);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-bottom-color: var(--border);
}
.nav-inner {
  width: min(100% - 2.5rem, var(--content-wide));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  letter-spacing: 0.02em;
}
.logo-mark {
  width: 52px;
  height: auto;
  flex-shrink: 0;
  display: block;
}
.logo-wordmark {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  line-height: 1.1;
}
.logo-wordmark .logo-line-1 {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-primary);
}
.logo-wordmark .logo-line-2 {
  font-size: 0.5625rem;
  font-weight: 400;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  transition: color 0.25s var(--ease-soft);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-cta {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
}
.nav-cta:hover {
  border-color: rgba(200, 200, 210, 0.28);
  background: rgba(255, 255, 255, 0.03);
  box-shadow: 0 0 24px rgba(122, 143, 168, 0.08);
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 16px;
  height: 1px;
  background: var(--text-primary);
  position: relative;
  transition: transform 0.3s var(--ease-soft);
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-toggle span::before { top: -5px; }
.nav-toggle span::after { top: 5px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.95rem 1.75rem;
  transition: background 0.3s var(--ease-soft), border-color 0.3s, color 0.3s, box-shadow 0.3s, transform 0.3s var(--ease-out);
  position: relative;
}
.btn-primary {
  background: var(--text-primary);
  color: var(--bg-void);
  border: 1px solid var(--text-primary);
}
.btn-primary:hover {
  background: #fff;
  box-shadow: 0 0 40px rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
  padding-left: 0;
  padding-right: 0;
  letter-spacing: 0.06em;
  text-transform: none;
  font-weight: 400;
}
.btn-ghost:hover { color: var(--text-primary); }
.btn-ghost .arrow {
  transition: transform 0.3s var(--ease-out);
  display: inline-block;
}
.btn-ghost:hover .arrow { transform: translateX(4px); }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}
.btn-outline:hover {
  border-color: rgba(200, 200, 210, 0.35);
  background: rgba(255, 255, 255, 0.03);
  box-shadow: 0 0 32px rgba(122, 143, 168, 0.1);
}

/* ─── Typography helpers ─── */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--accent);
  opacity: 0.7;
}
.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--text-primary);
  max-width: 18ch;
}
.section-lead {
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 42ch;
}
.section-header {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: clamp(3rem, 6vw, 4.5rem);
}
@media (min-width: 768px) {
  .section-header {
    grid-template-columns: 1fr 1fr;
    align-items: end;
    gap: 3rem;
  }
  .section-header .section-lead { justify-self: end; text-align: left; }
}

/* ─── Reveal ─── */
/* Only hide content when JS is running to reveal it again */
.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ─── Hero ─── */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-h) + 2rem) 0 4rem;
  overflow: hidden;
}
.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}
.hero-grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 10%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 10%, transparent 75%);
  opacity: 0.7;
}
.hero-vignette {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(122, 143, 168, 0.06), transparent 55%),
    radial-gradient(ellipse 60% 40% at 70% 60%, rgba(122, 143, 168, 0.04), transparent 50%),
    linear-gradient(to bottom, transparent 60%, var(--bg-void) 100%);
}
.hero-content {
  position: relative;
  z-index: 3;
  width: min(100% - 2.5rem, var(--content));
  margin-inline: auto;
  padding-top: 1rem;
}
.hero-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 2.25rem;
}
.hero-logo {
  width: clamp(180px, 24vw, 260px);
  height: auto;
}
.hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.85rem;
}
.hero-kicker .pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  animation: pulse 2.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}
.hero h1 {
  font-size: clamp(2.35rem, 5.8vw, 4.25rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.08;
  max-width: 14ch;
  color: var(--text-primary);
  margin-bottom: 1.75rem;
}
.hero h1 em {
  font-style: normal;
  color: var(--silver);
}
.hero-sub {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  font-weight: 300;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 38ch;
  margin-bottom: 2.75rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem 2.25rem;
}
.hero-meta {
  position: relative;
  z-index: 3;
  width: min(100% - 2.5rem, var(--content));
  margin: auto auto 0;
  padding-top: 4rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border-top: 1px solid var(--border);
}
.hero-meta-item {
  padding: 1.5rem 1.25rem 0 0;
}
.hero-meta-item:not(:last-child) {
  border-right: 1px solid var(--border);
  padding-right: 1.5rem;
}
.hero-meta-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}
.hero-meta-value {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: -0.01em;
}

/* ─── Sections shared ─── */
section {
  position: relative;
  padding: var(--section-pad) 0;
}
.section-line {
  width: min(100% - 2.5rem, var(--content));
  margin: 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}

/* ─── Mission ─── */
.mission {
  background: var(--bg-deep);
}
.mission-layout {
  display: grid;
  gap: 3.5rem;
}
@media (min-width: 900px) {
  .mission-layout {
    grid-template-columns: 1fr 1.15fr;
    gap: 5rem;
    align-items: start;
  }
}
.mission-quote {
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  font-weight: 300;
  letter-spacing: -0.025em;
  line-height: 1.4;
  color: var(--text-primary);
  border-left: 1px solid var(--accent);
  padding-left: 1.75rem;
}
.mission-quote mark {
  background: none;
  color: var(--silver);
}
.mission-body p {
  font-size: 1.0625rem;
  font-weight: 300;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}
.mission-body p:last-child { margin-bottom: 0; }
.mission-body strong {
  color: var(--text-primary);
  font-weight: 500;
}

/* ─── What We Build ─── */
.build-grid {
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
@media (min-width: 700px) {
  .build-grid { grid-template-columns: 1fr 1fr; }
}
.build-card {
  background: var(--bg-void);
  padding: clamp(1.75rem, 3vw, 2.5rem);
  position: relative;
  overflow: hidden;
  transition: background 0.4s var(--ease-soft);
}
.build-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(122, 143, 168, 0.4), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}
.build-card:hover {
  background: var(--bg-surface);
}
.build-card:hover::before { opacity: 1; }
.build-card-num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}
.build-card-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 1.5rem;
  color: var(--accent);
  opacity: 0.85;
}
.build-card h3 {
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
  color: var(--text-primary);
}
.build-card p {
  font-size: 0.9375rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 36ch;
}

/* Working principles band (under services) */
.principles-band {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  padding: clamp(1.5rem, 3vw, 2rem);
  border: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.02), transparent 50%),
    var(--bg-deep);
}
.principles-band-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  margin-bottom: 1.35rem;
}
.principles-band-head h3 {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-primary);
}
.principles-band-head p {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.principles-grid {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .principles-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1000px) {
  .principles-grid { grid-template-columns: repeat(5, 1fr); gap: 0.75rem; }
}
.principle-chip {
  padding: 0.85rem 0.9rem;
  border: 1px solid var(--border);
  background: var(--bg-void);
  min-height: 100%;
}
.principle-chip-num {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  margin-bottom: 0.45rem;
}
.principle-chip-title {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--silver);
  line-height: 1.35;
}

/* ─── Example build ─── */
.example-build {
  background: var(--bg-deep);
  overflow: hidden;
}
.system-panel {
  display: grid;
  gap: 0;
  border: 1px solid var(--border);
  background: var(--bg-void);
  position: relative;
}
@media (min-width: 900px) {
  .system-panel { grid-template-columns: 1.1fr 0.9fr; }
}
.system-copy {
  padding: clamp(2rem, 4vw, 3.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.system-copy h2 {
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  line-height: 1.2;
}
.system-copy p {
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  max-width: 42ch;
}
.system-copy p:last-of-type { margin-bottom: 1.5rem; }
.system-status {
  list-style: none;
  display: grid;
  gap: 0.55rem;
  margin: 0 0 1.75rem;
  padding: 0;
}
.system-status li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.8125rem;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.45;
}
.system-status .dot {
  width: 6px;
  height: 6px;
  margin-top: 0.4rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  flex-shrink: 0;
}
.system-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.system-tag {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.system-visual {
  position: relative;
  min-height: 360px;
  background: var(--bg-panel);
  border-left: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.system-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 55% 45% at 50% 50%, rgba(122, 143, 168, 0.1), transparent 70%);
  z-index: 1;
}
.system-visual-caption {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-align: center;
}
@media (max-width: 899px) {
  .system-visual {
    border-left: none;
    border-top: 1px solid var(--border);
    min-height: 280px;
  }
}
.system-diagram {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
}

/* ─── Mission pillars ─── */
.philosophy-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 3.5rem;
  border: 1px solid var(--border);
  background: var(--border);
}
.pillar {
  background: var(--bg-void);
  padding: 1.75rem 1.25rem;
  text-align: center;
}
.pillar-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.pillar-desc {
  font-size: 0.875rem;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ─── Company (quiet reality layer) ─── */
.company {
  background: var(--bg-deep);
  padding-top: calc(var(--section-pad) * 0.65);
  padding-bottom: calc(var(--section-pad) * 0.65);
}
.company-panel {
  border: 1px solid var(--border);
  background: var(--bg-void);
  display: grid;
  gap: 0;
}
@media (min-width: 800px) {
  .company-panel { grid-template-columns: 1.05fr 0.95fr; }
}
.company-main {
  padding: clamp(1.75rem, 3.5vw, 2.75rem);
  border-bottom: 1px solid var(--border);
}
@media (min-width: 800px) {
  .company-main {
    border-bottom: none;
    border-right: 1px solid var(--border);
  }
}
.company-main h2 {
  font-size: clamp(1.25rem, 2.2vw, 1.55rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin-bottom: 1rem;
  max-width: 22ch;
}
.company-main p {
  font-size: 0.9375rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 48ch;
}
.company-facts {
  display: grid;
  grid-template-columns: 1fr;
}
@media (min-width: 480px) {
  .company-facts { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 800px) {
  .company-facts { grid-template-columns: 1fr; }
}
.company-fact {
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  border-bottom: 1px solid var(--border);
}
.company-fact:last-child { border-bottom: none; }
@media (min-width: 480px) and (max-width: 799px) {
  .company-fact:nth-child(odd) { border-right: 1px solid var(--border); }
  .company-fact:nth-child(1),
  .company-fact:nth-child(2) { border-bottom: 1px solid var(--border); }
  .company-fact:nth-child(3),
  .company-fact:nth-child(4) { border-bottom: none; }
}
.company-fact-label {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
}
.company-fact-value {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* ─── Closing CTA ─── */
.closing {
  padding-bottom: clamp(6rem, 12vw, 9rem);
  position: relative;
  overflow: hidden;
}
.closing-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 50% 40% at 50% 100%, rgba(122, 143, 168, 0.08), transparent 70%);
}
.closing-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  padding: clamp(3rem, 6vw, 4.5rem) 1.5rem;
  border: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.015), transparent 40%),
    var(--bg-surface);
}
.closing-inner::before,
.closing-inner::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  border: 1px solid rgba(200, 200, 210, 0.25);
}
.closing-inner::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.closing-inner::after { bottom: -1px; right: -1px; border-left: none; border-top: none; }
.closing h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.35rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 1.25rem;
}
.closing p {
  font-size: 1.0625rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 2.25rem;
  max-width: 42ch;
  margin-inline: auto;
}
.closing-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

/* ─── Footer ─── */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0 3rem;
}
.footer-inner {
  width: min(100% - 2.5rem, var(--content-wide));
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.footer-mark {
  width: 34px;
  height: auto;
  opacity: 0.85;
}
.footer-brand {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.footer-meta {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* ─── Mobile nav ─── */
@media (max-width: 768px) {
  .js .nav-toggle { display: flex; }
  .js .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(5, 5, 7, 0.96);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 0 1rem;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    visibility: hidden; /* keeps closed-menu links out of the tab order */
    transition: transform 0.4s var(--ease-out), opacity 0.3s, visibility 0s linear 0.4s;
  }
  .js .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
    transition-delay: 0s;
  }
  .js .nav-links li a,
  .js .nav-links li .nav-cta {
    display: block;
    padding: 0.9rem 1.5rem;
    border: none;
  }
  .js .nav-links li .nav-cta {
    margin: 0.5rem 1.25rem 0;
    text-align: center;
    border: 1px solid var(--border-strong);
  }
  /* Without JS there's no menu toggle, so wrap the links beside the logo */
  html:not(.js) .nav { height: auto; min-height: var(--nav-h); padding: 0.75rem 0; }
  html:not(.js) .nav-links { flex-wrap: wrap; justify-content: flex-end; gap: 0.35rem 0.9rem; }
  html:not(.js) .nav-cta { padding: 0.35rem 0.7rem; }
  .hero-meta {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .hero-meta-item {
    border-right: none !important;
    border-bottom: 1px solid var(--border);
    padding: 1.15rem 0;
  }
  .hero-meta-item:last-child { border-bottom: none; }
  .philosophy-pillars { grid-template-columns: 1fr; }
  .logo-wordmark .logo-line-2 { display: none; }
  .hero-logo { display: none; } /* the nav already shows the anvil */
  .principles-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .hero-kicker .pulse { animation: none; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ═══════════════════════════════════════════════════════════
   Arm pages — Ascella · GPM (extends design system)
   ═══════════════════════════════════════════════════════════ */
.nav-links a.is-active { color: var(--text-primary); }
.nav-links {
  gap: 1.15rem;
}
@media (min-width: 900px) {
  .nav-links { gap: 1.35rem; }
}
.nav-links a {
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  white-space: nowrap;
}
.nav-arms-label {
  display: none;
}
@media (min-width: 1100px) {
  .nav-arms-label {
    display: inline;
    font-family: var(--font-mono);
    font-size: 0.5625rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-right: 0.15rem;
    padding-left: 0.75rem;
    border-left: 1px solid var(--border);
  }
}

/* Page hero (subpages) */
.page-hero {
  position: relative;
  min-height: min(72vh, 640px);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: calc(var(--nav-h) + 3rem) 0 3.5rem;
  overflow: hidden;
}
.page-hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}
.page-hero-grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 70% 55% at 40% 40%, black 10%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 55% at 40% 40%, black 10%, transparent 75%);
  opacity: 0.65;
}
.page-hero-vignette {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    radial-gradient(ellipse 70% 50% at 30% 20%, rgba(122, 143, 168, 0.07), transparent 55%),
    linear-gradient(to bottom, transparent 50%, var(--bg-void) 100%);
}
.page-hero-content {
  position: relative;
  z-index: 3;
  width: min(100% - 2.5rem, var(--content));
  margin-inline: auto;
}
.page-crumb {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}
.page-crumb a { color: var(--text-muted); transition: color 0.2s; }
.page-crumb a:hover { color: var(--text-primary); }
.page-crumb span { color: var(--text-dim); }
.page-hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.5rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.08;
  max-width: 16ch;
  margin-bottom: 1.25rem;
}
.page-hero h1 em {
  font-style: normal;
  color: var(--silver);
}
.page-hero-lead {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  font-weight: 300;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 44ch;
  margin-bottom: 2rem;
}
.page-hero-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  max-width: 720px;
}
.page-hero-meta .hero-meta-item { padding: 0 1rem 0 0; }
.page-hero-meta .hero-meta-item:not(:last-child) {
  border-right: 1px solid var(--border);
  padding-right: 1.25rem;
}
@media (max-width: 640px) {
  .page-hero-meta { grid-template-columns: 1fr; }
  .page-hero-meta .hero-meta-item {
    border-right: none !important;
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
  }
  .page-hero-meta .hero-meta-item:last-child { border-bottom: none; }
}

.prose-block p {
  font-size: 1.0625rem;
  font-weight: 300;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 1.15rem;
  max-width: 62ch;
}
.prose-block p:last-child { margin-bottom: 0; }
.prose-block strong {
  color: var(--text-primary);
  font-weight: 500;
}

.split-2 {
  display: grid;
  gap: 2.5rem;
}
@media (min-width: 900px) {
  .split-2 {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 4rem;
    align-items: start;
  }
}

.feature-grid {
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
@media (min-width: 700px) {
  .feature-grid.cols-2 { grid-template-columns: 1fr 1fr; }
  .feature-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
}
.feature-card {
  background: var(--bg-void);
  padding: clamp(1.5rem, 2.5vw, 2rem);
  transition: background 0.35s var(--ease-soft);
}
.feature-card:hover { background: var(--bg-surface); }
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 0.65rem;
}
.feature-card p {
  font-size: 0.9rem;
  font-weight: 300;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 38ch;
}
.feature-card .num {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  margin-bottom: 1rem;
}

.bg-deep { background: var(--bg-deep); }

.product-strip {
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
@media (min-width: 800px) {
  .product-strip { grid-template-columns: 1.2fr 1fr 1fr; }
}
.product-cell {
  background: var(--bg-void);
  padding: 1.75rem 1.5rem;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background 0.35s;
}
.product-cell:hover { background: var(--bg-surface); }
.product-cell .tag {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.product-cell h3 {
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.product-cell p {
  font-size: 0.875rem;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.55;
}

.page-cta {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  padding: clamp(2.5rem, 5vw, 3.5rem) 1.5rem;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.015), transparent 40%), var(--bg-surface);
}
.page-cta h2 {
  font-size: clamp(1.4rem, 2.8vw, 1.9rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}
.page-cta p {
  font-size: 1rem;
  font-weight: 300;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
  line-height: 1.65;
}

/* Product links inside cards, inline fact links */
.build-card .btn-ghost { margin-top: 1.25rem; }
.fact-link {
  color: var(--silver);
  border-bottom: 1px solid rgba(200, 200, 210, 0.25);
}
.fact-link:hover { border-bottom-color: var(--silver); }
.product-cell .btn-ghost { margin-top: 1rem; }