:root {
  --industrial-white: #f6f8fb;
  --surface: #ffffff;
  --system-navy: #0e2a47;
  --graphite: #111827;
  --structural-gray: #5b6675;
  --grid-gray: #d9e2ec;
  --precision-cyan: #00a9c6;
  --signal-mint: #00b884;
  --hazard-amber: #ff8a00;
  --failure-red: #d64545;
  --border: rgba(14, 42, 71, 0.14);
  --soft-border: rgba(14, 42, 71, 0.08);
  --shadow: 0 24px 80px rgba(17, 24, 39, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans", "Inter", "Segoe UI", Arial, sans-serif;
  color: var(--graphite);
  background:
    linear-gradient(to right, rgba(217, 226, 236, 0.42) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(217, 226, 236, 0.42) 1px, transparent 1px),
    var(--industrial-white);
  background-size: 64px 64px;
}

a { color: inherit; text-decoration: none; }

/* ---- SHELL ---- */
.shell {
  width: min(1180px, calc(100vw - 40px));
  margin: 0 auto;
}

/* ---- HEADER ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--soft-border);
  background: rgba(246, 248, 251, 0.88);
  backdrop-filter: blur(14px);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 86px;
  height: auto;
  display: block;
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-name {
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--system-navy);
}

.brand-system {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  color: var(--structural-gray);
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 13px;
  color: var(--structural-gray);
}

.nav-links a:hover { color: var(--system-navy); }

/* ---- BUTTONS ---- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid var(--system-navy);
  border-radius: 4px;
  background: var(--system-navy);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.button:hover { transform: translateY(-1px); }

.button.secondary {
  background: transparent;
  color: var(--system-navy);
}

.button.ghost {
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.5);
  color: var(--system-navy);
}

/* ---- EYEBROW ---- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  color: var(--structural-gray);
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--signal-mint);
  border-radius: 50%;
}

/* ---- TYPOGRAPHY ---- */
h1, h2, h3 {
  margin: 0;
  color: var(--system-navy);
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  letter-spacing: 0;
}

h1 {
  max-width: 860px;
  font-size: clamp(44px, 7vw, 84px);
  line-height: 0.94;
}

h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.05;
}

h3 { font-size: 22px; }

/* ---- HERO ---- */
.hero {
  padding: 100px 0 80px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.82fr);
  gap: 44px;
  align-items: center;
}

.lead {
  max-width: 700px;
  margin: 26px 0 0;
  font-size: 18px;
  line-height: 1.72;
  color: var(--structural-gray);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.54);
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  color: var(--structural-gray);
}

/* ---- DIAGNOSTIC PANEL ---- */
.scan-panel {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
  border-radius: 6px;
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 18px 14px;
  border-bottom: 1px solid var(--soft-border);
}

.panel-title {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  color: var(--system-navy);
}

.status-pill {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  color: var(--signal-mint);
}

.risk-stack { padding: 18px; }

.risk-row {
  display: grid;
  grid-template-columns: 36px 1fr;
  align-items: center;
  gap: 14px;
  min-height: 52px;
  border-bottom: 1px solid var(--soft-border);
}

.risk-row:last-child { border-bottom: 0; }

.risk-code {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-weight: 700;
  font-size: 15px;
  color: var(--system-navy);
}

.risk-name {
  font-size: 14px;
  color: var(--graphite);
}

/* ---- SECTIONS ---- */
.section {
  padding: 74px 0;
  border-top: 1px solid var(--soft-border);
}

.section.compact { padding: 48px 0; }

.section-heading {
  display: grid;
  gap: 14px;
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.05;
}

.section-heading p {
  margin: 0;
  color: var(--structural-gray);
  line-height: 1.7;
  font-size: 17px;
}

/* ---- CARDS ---- */
.card {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.72);
  border-radius: 6px;
}

.matrix {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.matrix-card {
  min-height: 184px;
  padding: 18px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.72);
  border-radius: 6px;
}

.matrix-code {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--precision-cyan);
}

.matrix-card h3 { margin-top: 18px; font-size: 19px; }

.matrix-card p {
  margin: 12px 0 0;
  color: var(--structural-gray);
  line-height: 1.62;
  font-size: 14px;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.text-card {
  padding: 22px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.72);
  border-radius: 6px;
}

.text-card h3 { font-size: 20px; }

.text-card p {
  margin: 12px 0 0;
  color: var(--structural-gray);
  line-height: 1.62;
  font-size: 14px;
}

/* ---- FDE CALLOUT ---- */
.fde-callout {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.72);
  border-radius: 6px;
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}

.fde-callout .eyebrow { margin-bottom: 12px; }

.fde-callout h3 { font-size: 24px; margin-bottom: 8px; }

.fde-callout p {
  margin: 0;
  color: var(--structural-gray);
  line-height: 1.62;
  font-size: 14px;
  max-width: 560px;
}

/* ---- ALIGNMENT LINE ---- */
.alignment-accent {
  width: 100%;
  height: 1px;
  background: var(--precision-cyan);
  opacity: 0.38;
  margin: 0 0 40px;
}

/* ---- FOOTER ---- */
.site-footer {
  padding: 34px 0;
  border-top: 1px solid var(--soft-border);
  color: var(--structural-gray);
  font-size: 13px;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-grid a { color: var(--system-navy); }
.footer-grid a:hover { text-decoration: underline; }

/* ---- RESPONSIVE ---- */
@media (max-width: 940px) {
  .hero-grid,
  .two-col,
  .fde-callout {
    grid-template-columns: 1fr;
  }

  .matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .nav-links { display: none; }

  .hero { padding: 68px 0 52px; }
}

@media (max-width: 620px) {
  .shell { width: min(100vw - 28px, 1180px); }

  .matrix,
  .two-col {
    grid-template-columns: 1fr;
  }

  .brand-system { display: none; }

  .footer-grid { flex-direction: column; text-align: center; }
}