:root {
  color-scheme: dark;
  --ink: #0b0e0c;
  --panel: #121713;
  --panel-2: #171d18;
  --line: #303830;
  --paper: #eeeade;
  --muted: #929b91;
  --acid: #c7ff45;
  --amber: #ff9d3d;
  --red: #ff5e57;
  font-family: "IBM Plex Mono", "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.16;
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 32px 32px;
}

.topbar, footer {
  min-height: 58px;
  padding: 0 4vw;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  letter-spacing: .08em;
}

.brand { color: var(--paper); text-decoration: none; font-weight: 700; }
.live-indicator { color: var(--acid); display: flex; align-items: center; gap: 9px; }
.live-indicator b { font-weight: 400; }
.live-indicator.offline { color: var(--amber); }
.live-indicator.offline span { background: var(--amber); box-shadow: none; }
.live-indicator span { width: 7px; height: 7px; border-radius: 50%; background: var(--acid); box-shadow: 0 0 14px var(--acid); }

main { width: min(1440px, 92vw); margin: 0 auto; }
.hero { padding: 8vh 0 6vh; display: grid; grid-template-columns: 1.7fr 1fr; gap: 3rem; align-items: end; }
.eyebrow { grid-column: 1 / -1; color: var(--acid); font-size: 11px; letter-spacing: .14em; margin: 0; }
h1 { font-family: Arial, Helvetica, sans-serif; font-size: clamp(3rem, 7vw, 7.2rem); line-height: .89; letter-spacing: -.065em; margin: 0; max-width: 1000px; }
h1 em { color: var(--acid); font-style: normal; }
.lede { color: #b7beb5; line-height: 1.7; font-size: 14px; margin: 0 0 .5rem; max-width: 520px; }

.system-map { display: grid; grid-template-columns: 1fr 100px 1fr 100px 1fr; border: 1px solid var(--line); background: var(--panel); }
.system-node { min-height: 110px; padding: 22px; display: flex; align-items: center; gap: 18px; position: relative; }
.system-node strong, .system-node small { display: block; }
.system-node strong { font-size: 13px; letter-spacing: .05em; }
.system-node small { color: var(--muted); font-size: 10px; margin-top: 7px; }
.node-index { color: var(--muted); font-size: 10px; }
.system-node i { position: absolute; width: 8px; height: 8px; border-radius: 50%; right: 18px; top: 18px; background: #536054; transition: .25s; }
.system-node.active i { background: var(--acid); box-shadow: 0 0 18px var(--acid); }
.connector { display: grid; place-items: center; color: var(--muted); font-size: 9px; border-left: 1px solid var(--line); border-right: 1px solid var(--line); position: relative; overflow: hidden; }
.connector::after { content: ""; width: 100%; height: 1px; background: var(--line); position: absolute; }
.connector span { background: var(--panel); z-index: 1; padding: 4px; }

.workbench { display: grid; grid-template-columns: 1.35fr 1fr; margin-top: 22px; border: 1px solid var(--line); min-height: 500px; }
.scenario-panel, .evidence-panel { padding: 26px; background: var(--panel); }
.evidence-panel { border-left: 1px solid var(--line); background: var(--panel-2); }
.section-heading { display: flex; justify-content: space-between; color: var(--muted); font-size: 10px; letter-spacing: .1em; padding-bottom: 20px; }
.step { color: var(--acid); }
.scenario-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.scenario-grid button { min-height: 116px; border: 1px solid var(--line); background: #0f130f; color: var(--paper); text-align: left; padding: 18px; font: inherit; cursor: pointer; transition: .15s ease; position: relative; }
.scenario-grid button:hover, .scenario-grid button.selected { border-color: var(--acid); transform: translateY(-2px); }
.scenario-grid button:disabled { opacity: .5; cursor: wait; transform: none; }
.scenario-grid b { color: var(--acid); font-size: 10px; position: absolute; top: 15px; right: 15px; }
.scenario-grid span, .scenario-grid small { display: block; }
.scenario-grid span { font-weight: 700; font-size: 13px; margin-top: 22px; }
.scenario-grid small { color: var(--muted); font-size: 10px; margin-top: 8px; }

.empty-state { min-height: 390px; display: grid; place-content: center; text-align: center; color: var(--muted); }
.empty-state span { color: var(--paper); font-size: 13px; }
.empty-state p { max-width: 340px; line-height: 1.7; font-size: 11px; }
.result-summary { display: flex; gap: 20px; align-items: center; padding: 20px 0 24px; border-bottom: 1px solid var(--line); }
#result-code { font-family: Arial, sans-serif; font-size: 48px; font-weight: 800; color: var(--acid); }
.result-summary small, .result-summary strong { display: block; }
.result-summary small { color: var(--muted); font-size: 9px; }
.result-summary strong { margin-top: 5px; }
dl { margin: 0; }
dl div { display: grid; grid-template-columns: 140px 1fr; gap: 12px; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 10px; }
dt { color: var(--muted); } dd { margin: 0; overflow-wrap: anywhere; }
.timeline { list-style: none; margin: 18px 0 0; padding: 0; max-height: 190px; overflow: auto; }
.timeline li { display: grid; grid-template-columns: 48px 46px 1fr; padding: 7px 0; font-size: 10px; border-left: 1px solid var(--line); margin-left: 4px; padding-left: 14px; }
.timeline .out { color: var(--amber); } .timeline .in { color: var(--acid); }
.timeline time { color: var(--muted); }

.principle { margin: 22px 0 7vh; padding: 30px; border: 1px solid var(--line); display: grid; grid-template-columns: 180px 1fr; gap: 12px 30px; align-items: start; }
.principle span { color: var(--acid); font-size: 10px; }
.principle p { font-family: Arial, sans-serif; font-size: clamp(1.4rem, 3vw, 2.8rem); font-weight: 700; letter-spacing: -.03em; margin: 0; }
.principle div { grid-column: 2; color: var(--muted); font-size: 9px; letter-spacing: .1em; }
footer { border-top: 1px solid var(--line); border-bottom: 0; color: var(--muted); }
footer a { color: var(--acid); text-decoration: none; }
footer a:hover { text-decoration: underline; }

@media (max-width: 860px) {
  .hero, .workbench { grid-template-columns: 1fr; }
  .hero { padding-top: 6vh; }
  .lede { margin-top: 0; }
  .system-map { grid-template-columns: 1fr; }
  .connector { min-height: 35px; border: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .connector::after { width: 1px; height: 100%; }
  .evidence-panel { border-left: 0; border-top: 1px solid var(--line); }
  .principle { grid-template-columns: 1fr; }
  .principle div { grid-column: 1; }
}

@media (max-width: 540px) {
  main { width: min(94vw, 1440px); }
  .topbar { padding: 0 3vw; }
  .brand { font-size: 10px; }
  h1 { font-size: 2.8rem; }
  .scenario-grid { grid-template-columns: 1fr; }
  .scenario-panel, .evidence-panel { padding: 18px; }
}