/* ===================================================
   Resilient Control — Design Tokens
   =================================================== */
:root {
  --paper: #F6F7F9;
  --paper-raised: #FFFFFF;
  --ink: #10161C;
  --ink-soft: #4A5560;
  --steel: #1C3B57;
  --steel-deep: #122A40;
  --brass: #B4884B;
  --brass-soft: #D9BE8F;
  --hairline: #D7DBE0;
  --hairline-strong: #B7BEC6;

  --font-display: "Space Grotesk", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --max-width: 1120px;
  --gutter: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

a { color: var(--steel); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--brass); outline-offset: 3px; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--brass);
  display: inline-block;
}

.hairline {
  border: none;
  border-top: 1px solid var(--hairline);
  margin: 0;
}

/* ---------------- Header ---------------- */
header.site {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 247, 249, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px var(--gutter);
  max-width: var(--max-width);
  margin: 0 auto;
}
.brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.brand .dot { color: var(--brass); }
.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  margin: 0; padding: 0;
  font-size: 14.5px;
}
.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.15s ease;
}
.nav-links a:hover { color: var(--steel); }
.nav-cta {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  background: var(--steel);
  color: var(--paper) !important;
  padding: 9px 18px;
  border-radius: 3px;
  text-decoration: none;
  white-space: nowrap;
}
.nav-cta:hover { background: var(--steel-deep); }
.menu-toggle { display: none; }

/* ---------------- Hero ---------------- */
.hero {
  padding: clamp(56px, 9vw, 108px) var(--gutter) 40px;
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(34px, 4.6vw, 54px);
  line-height: 1.08;
}
.hero h1 em {
  font-style: normal;
  color: var(--steel);
  border-bottom: 3px solid var(--brass-soft);
}
.hero p.lede {
  font-size: 18.5px;
  color: var(--ink-soft);
  max-width: 46ch;
  margin-top: 22px;
}
.hero-ctas {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.btn {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.03em;
  padding: 13px 22px;
  border-radius: 3px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--steel); color: var(--paper); }
.btn-primary:hover { background: var(--steel-deep); }
.btn-ghost { border-color: var(--hairline-strong); color: var(--ink); }
.btn-ghost:hover { border-color: var(--steel); color: var(--steel); }

.hero-meta {
  margin-top: 36px;
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-soft);
}
.hero-meta span { white-space: nowrap; }
.hero-meta strong { color: var(--ink); }

/* ---------------- Tension diagram (signature element) ---------------- */
.diagram-wrap {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 460px;
  margin: 0 auto;
}
#tension-svg { width: 100%; height: 100%; }
.node-line {
  stroke: var(--brass);
  stroke-width: 1.4;
  opacity: 0.55;
}
.node-line.shift { stroke: var(--steel); opacity: 0.85; }
.node-dot { fill: var(--paper-raised); stroke: var(--steel); stroke-width: 1.6; }
.node-dot.center { fill: var(--steel); stroke: var(--steel); }
.node-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  fill: var(--ink-soft);
  letter-spacing: 0.04em;
}
.node-label.center-label { fill: var(--paper); font-size: 10px; }

/* ---------------- Section shells ---------------- */
section { padding: 80px var(--gutter); }
.section-inner { max-width: var(--max-width); margin: 0 auto; }
.section-head { max-width: 62ch; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(26px, 3.2vw, 36px); line-height: 1.15; }
.section-head p { color: var(--ink-soft); font-size: 17px; margin-top: 14px; }

/* ---------------- Problem / framing ---------------- */
.framing {
  background: var(--steel);
  color: var(--paper);
}
.framing .eyebrow { color: var(--brass-soft); }
.framing .eyebrow::before { background: var(--brass-soft); }
.framing h2 { color: var(--paper); }
.framing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.framing-quote {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.3vw, 26px);
  line-height: 1.4;
  font-weight: 500;
}
.framing-quote span.strike { text-decoration: line-through; opacity: 0.55; }
.framing-body p { color: rgba(246,247,249,0.82); font-size: 16.5px; margin: 0 0 16px; }
.framing-body p:last-child { margin-bottom: 0; }

/* ---------------- Services / anchor points ---------------- */
.anchors {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}
.anchor {
  background: var(--paper-raised);
  padding: 32px 28px;
}
.anchor .code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--brass);
  letter-spacing: 0.06em;
}
.anchor h3 {
  font-size: 19px;
  margin-top: 10px;
  margin-bottom: 10px;
}
.anchor p {
  color: var(--ink-soft);
  font-size: 15px;
  margin: 0;
}

/* ---------------- Comparison ---------------- */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--hairline);
}
.compare-col { padding: 36px 32px; }
.compare-col + .compare-col { border-left: 1px solid var(--hairline); }
.compare-col.win { background: var(--paper-raised); }
.compare-col h3 {
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 20px;
  font-weight: 500;
}
.compare-col.win h3 { color: var(--steel); }
.compare-list { list-style: none; margin: 0; padding: 0; }
.compare-list li {
  padding: 12px 0;
  border-top: 1px solid var(--hairline);
  font-size: 15px;
  color: var(--ink-soft);
  display: flex;
  gap: 10px;
}
.compare-list li:first-child { border-top: none; }
.compare-list li::before { content: "–"; color: var(--hairline-strong); flex-shrink: 0; }
.compare-col.win .compare-list li::before { content: "✓"; color: var(--brass); }
.compare-col.win .compare-list li { color: var(--ink); }

/* ---------------- About ---------------- */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}
.credential-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ink-soft);
}
.credential-list li {
  padding: 10px 0;
  border-top: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.credential-list li:first-child { border-top: none; }
.credential-list li strong { color: var(--ink); font-weight: 500; }
.about-body p { margin: 0 0 16px; color: var(--ink-soft); }
.about-body p:last-child { margin-bottom: 0; }
.about-body strong { color: var(--ink); font-weight: 600; }

/* ---------------- CTA / Contact ---------------- */
.contact {
  background: var(--ink);
  color: var(--paper);
}
.contact .eyebrow { color: var(--brass-soft); }
.contact .eyebrow::before { background: var(--brass-soft); }
.contact h2 { color: var(--paper); font-size: clamp(28px, 3.6vw, 42px); max-width: 20ch; }
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: end;
  margin-top: 36px;
}
.contact-links {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.contact-link {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(246,247,249,0.25);
  padding-bottom: 12px;
  display: flex;
  justify-content: space-between;
  transition: border-color 0.15s ease;
}
.contact-link:hover { border-color: var(--brass-soft); }
.contact-link .arrow { color: var(--brass-soft); }
.contact-note { color: rgba(246,247,249,0.65); font-size: 14.5px; max-width: 40ch; }

/* ---------------- Footer ---------------- */
footer {
  padding: 28px var(--gutter);
  border-top: 1px solid var(--hairline);
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  flex-wrap: wrap;
  gap: 10px;
}

/* Content is always visible by default — no JS-gated opacity.
   Reliable for slow connections, JS failures and search crawlers. */

/* ---------------- Responsive ---------------- */
@media (max-width: 860px) {
  .nav-links { display: none; }
  .hero { grid-template-columns: 1fr; }
  .diagram-wrap { max-width: 320px; margin-top: 12px; }
  .framing-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .anchors { grid-template-columns: 1fr 1fr; }
  .compare { grid-template-columns: 1fr; }
  .compare-col + .compare-col { border-left: none; border-top: 1px solid var(--hairline); }
}
@media (max-width: 560px) {
  .anchors { grid-template-columns: 1fr; }
  section { padding: 56px var(--gutter); }
}