:root {
  --bg:      #060918;
  --bg2:     #0c1225;
  --bg3:     #111d35;
  --border:  #1a2840;
  --text:    #eef1f8;
  --text2:   #7d90b0;
  --text3:   #3d5070;
  --navy:    #4080e0;
  --blue:    #4080e0;
  --live:    #22c55e;
  --red:     #e05050;
  --amber:   #d97706;
  --mono:    'IBM Plex Mono', monospace;
  --sans:    'IBM Plex Sans', system-ui, sans-serif;
  --cond:    'IBM Plex Sans Condensed', system-ui, sans-serif;
}
html { scroll-behavior: smooth; }
body { font-family: var(--sans); background: var(--bg); color: var(--text); overflow-x: hidden; }

nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px; height: 56px;
  background:rgba(6,9,24,.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-logo { font-family: var(--cond); font-size: 18px; font-weight: 700; letter-spacing: .06em; color: var(--navy); text-transform: uppercase; }
.nav-logo span { color: var(--text); }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 15px; font-weight: 400; color: var(--text2); transition: color .15s; }
.nav-links a:hover { color: var(--text); }
.nav-cta { font-size: 13px; font-weight: 600; background: var(--navy); color: #fff; border: none; padding: 8px 20px; cursor: pointer; transition: background .15s; border-radius: 2px; }
.nav-cta:hover { background: var(--blue); }
.nav-login { font-size: 13px; font-weight: 500; color: var(--text2); padding: 8px 16px; border: 1px solid var(--border); border-radius: 2px; transition: border-color .15s, color .15s; }
.nav-login:hover { border-color: var(--text2); color: var(--text); }

/* HERO */
.hero {
  padding: 80px 56px 72px;
  border-bottom: 1px solid var(--border);
  max-width: 900px;
}
.eyebrow {
  font-family: var(--mono); font-size: 10px; letter-spacing: .18em;
  color: var(--blue); text-transform: uppercase; margin-bottom: 24px;
  display: flex; align-items: center; gap: 10px;
}
.eyebrow::before { content: ''; display: block; width: 24px; height: 1px; background: var(--blue); }
h1 {
  font-family: var(--cond); font-size: clamp(44px, 6vw, 72px);
  font-weight: 700; letter-spacing: .02em;
  line-height: 1.02; color: var(--text); margin-bottom: 24px;
}
.hero-sub {
  font-size: 17px; color: var(--text2);
  line-height: 1.75; max-width: 640px; margin-bottom: 40px;
}
.manifesto {
  font-family: var(--mono); font-size: 13px; letter-spacing: .12em;
  color: var(--navy);
  border-left: 3px solid var(--navy); padding-left: 16px;
  margin-bottom: 40px;
}
.hero-actions { display: flex; gap: 12px; }
.btn-primary {
  font-size: 14px; font-weight: 600;
  background: var(--navy); color: #fff; border: none;
  padding: 12px 28px; cursor: pointer; transition: background .15s; border-radius: 2px; display: inline-block; text-align: center;
}
.btn-primary:hover { background: var(--blue); }
.btn-secondary {
  font-size: 14px; font-weight: 500;
  background: transparent; color: var(--text2); border: 1px solid var(--border);
  padding: 12px 28px; cursor: pointer; transition: color .15s, border-color .15s; border-radius: 2px;
  display: inline-block; text-align: center;
}
.btn-secondary:hover { color: var(--text); border-color: var(--text2); }

/* GRAPH VIZ */
.graph-viz-wrap {
  border-bottom: 1px solid var(--border);
  background: var(--bg2); padding: 48px 56px;
  overflow-x: auto;
}
.graph-label {
  font-family: var(--mono); font-size: 10px; letter-spacing: .15em;
  color: var(--text3); text-transform: uppercase; margin-bottom: 24px;
}
.graph-canvas {
  display: flex; align-items: center; gap: 0;
  min-width: 800px;
}
.g-node {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  flex-shrink: 0;
}
.g-node-box {
  border: 1px solid var(--border); background:var(--bg2);
  padding: 8px 14px; min-width: 130px; text-align: center;
  border-radius: 2px; box-shadow: 0 1px 4px rgba(15,76,129,.06);
}
.g-node-box.active { border-color: var(--navy); background: rgba(15,76,129,.04); }
.g-node-box.risk { border-color: var(--red); background: rgba(220,38,38,.04); }
.g-node-box.warn { border-color: var(--amber); background: rgba(217,119,6,.04); }
.g-node-type { font-family: var(--mono); font-size: 9px; letter-spacing: .14em; color: var(--text3); text-transform: uppercase; margin-bottom: 3px; }
.g-node-name { font-family: var(--mono); font-size: 11px; color: var(--text); }
.g-node-meta { font-family: var(--mono); font-size: 10px; color: var(--text2); }
.g-edge {
  display: flex; align-items: center; flex-direction: column;
  flex-shrink: 0; padding: 0 4px;
}
.g-edge-line { width: 32px; height: 1px; background: var(--border); }
.g-edge-label { font-family: var(--mono); font-size: 8px; letter-spacing: .1em; color: var(--text3); text-transform: uppercase; white-space: nowrap; margin-top: 4px; }
.g-arrow { font-size: 10px; color: var(--text3); margin-left: -6px; }
.g-cluster { display: flex; flex-direction: column; gap: 8px; }

/* TRAVERSAL CAPABILITIES */
.capabilities {
  display: grid; grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--border);
}
.cap-cell {
  padding: 40px 40px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cap-cell:nth-child(2n) { border-right: none; }
.cap-cell:nth-child(3), .cap-cell:nth-child(4) { border-bottom: none; }
.cap-code {
  font-family: var(--mono); font-size: 10px; letter-spacing: .18em;
  color: var(--blue); text-transform: uppercase; margin-bottom: 16px;
  display: flex; align-items: center; gap: 8px;
}
.cap-code::before { content: '▸'; font-size: 10px; }
.cap-title {
  font-family: var(--cond); font-size: 20px; font-weight: 700;
  letter-spacing: .02em; margin-bottom: 14px; color: var(--text);
}
.cap-body { font-size: 15px; color: var(--text2); line-height: 1.75; }

/* HOP DIAGRAM */
.hop-diagram {
  display: flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 10px; margin-top: 16px;
  flex-wrap: wrap;
}
.hop { background: var(--bg3); border: 1px solid var(--border); padding: 4px 10px; color: var(--text2); white-space: nowrap; border-radius: 2px; }
.hop.h0 { border-color: var(--navy); color: var(--navy); }
.hop.h-end { border-color: var(--live); color: var(--live); }
.hop.h-risk { border-color: var(--red); color: var(--red); }
.hop-arrow { color: var(--text3); font-size: 9px; }

/* SCENARIOS */
.scenarios-header {
  padding: 48px 56px 32px;
  border-bottom: 1px solid var(--border);
}
.scenarios-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.scenario-cell {
  padding: 36px 32px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.scenario-cell:nth-child(3n) { border-right: none; }
.scenario-cell:nth-child(4), .scenario-cell:nth-child(5), .scenario-cell:nth-child(6) { border-bottom: none; }
.sc-num {
  font-family: var(--mono); font-size: 10px; letter-spacing: .16em;
  color: var(--text3); text-transform: uppercase; margin-bottom: 20px;
  padding-bottom: 16px; border-bottom: 1px solid var(--border);
}
.sc-title {
  font-family: var(--cond); font-size: 17px; font-weight: 700;
  letter-spacing: .02em; margin-bottom: 14px;
  color: var(--text);
}
.sc-setup { font-size: 14px; color: var(--text2); line-height: 1.75; margin-bottom: 16px; }
.sc-resolution {
  font-size: 14px; color: var(--text);
  line-height: 1.75; padding-top: 16px;
  border-top: 1px solid var(--border);
}
.sc-outcome {
  font-family: var(--mono); font-size: 11px; color: var(--live);
  margin-top: 12px; letter-spacing: .04em;
}
.sc-outcome.risk { color: var(--red); }
.sc-outcome.warn { color: var(--amber); }

/* CTA */
.cta-wrap {
  padding: 80px 56px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 48px; flex-wrap: wrap; border-bottom: 1px solid var(--border);
  background: var(--bg2);
}
.cta-h2 {
  font-family: var(--cond); font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 700; letter-spacing: .02em; margin-bottom: 12px; color: var(--text);
}
.cta-p { font-size: 16px; color: var(--text2); line-height: 1.7; max-width: 480px; }

footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 28px 40px; flex-wrap: wrap; gap: 16px; border-top: 1px solid var(--border);
}
.footer-logo { font-family: var(--cond); font-size: 14px; font-weight: 700; letter-spacing: .06em; color: var(--navy); text-transform: uppercase; }
.footer-logo span { color: var(--text2); }
.footer-links { display: flex; gap: 28px; }
.footer-links a { font-size: 13px; color: var(--text3); transition: color .15s; }
.footer-links a:hover { color: var(--text2); }
.footer-copy { font-size: 12px; color: var(--text3); }

/* Modal */
.overlay { display: none; position: fixed; inset: 0; background: rgba(13,27,42,.55); z-index: 200; align-items: center; justify-content: center; }
.overlay.open { display: flex; }
.modal { background:var(--bg2); border: 1px solid var(--border); padding: 40px; width: 420px; max-width: 92vw; box-shadow: 0 20px 60px rgba(13,27,42,.18); }
.modal-eyebrow { font-family: var(--mono); font-size: 10px; letter-spacing: .15em; color: var(--blue); text-transform: uppercase; margin-bottom: 16px; }
.modal h3 { font-family: var(--cond); font-size: 24px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.modal p { font-size: 15px; color: var(--text2); margin-bottom: 28px; line-height: 1.6; }
.modal label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 5px; }
.modal input { width: 100%; padding: 10px 12px; background: var(--bg2); border: 1px solid var(--border); color: var(--text); font-size: 14px; margin-bottom: 14px; outline: none; font-family: var(--sans); transition: border-color .15s; border-radius: 2px; }
.modal input:focus { border-color: var(--blue); background:var(--bg2); }
.modal-btns { display: flex; gap: 10px; margin-top: 4px; }
.btn-cancel { flex: 1; background: transparent; border: 1px solid var(--border); color: var(--text2); padding: 10px; font-size: 13px; cursor: pointer; font-family: var(--sans); border-radius: 2px; }
.btn-submit { flex: 2; background: var(--navy); color: #fff; border: 1px solid var(--navy); padding: 10px; font-size: 13px; font-weight: 600; cursor: pointer; font-family: var(--sans); border-radius: 2px; transition: background .15s; }
.btn-submit:hover { background: var(--blue); border-color: var(--blue); }

@media(max-width:768px){
  nav{padding:0 20px;}
  .nav-links a:not(.nav-login){display:none;}
  .nav-links{gap:12px;}
  .hero{padding:56px 24px 48px;}
  .graph-viz-wrap{padding:32px 24px;}
  .capabilities{grid-template-columns:1fr;}
  .cap-cell{border-right:none;border-bottom:1px solid var(--border);}
  .cap-cell:last-child{border-bottom:none;}
  .scenarios-grid{grid-template-columns:1fr;}
  .scenario-cell{border-right:none;}
  .cta-wrap{padding:56px 24px;flex-direction:column;}
  .scenarios-header{padding:40px 24px 28px;}
  footer{padding:20px 24px;}
}
.data-bar {
  height: 36px; background: #f4f6f9; border-bottom: 1px solid #d8dde5;
  display: flex; align-items: center; justify-content: center; gap: 32px;
}
.data-bar-item { font-size: 12px; color: #8a9aac; display: flex; align-items: center; gap: 6px; }
.data-bar-item strong { color: #4a6078; font-weight: 500; }
.data-bar-sep { color: #d8dde5; }