:root {
  color-scheme: dark;
  --ink: #070a08;
  --paper: #f0f2eb;
  --muted: #8f978e;
  --line: #2c332d;
  --signal: #afff3f;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
}

.skip {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px;
  background: var(--signal);
  color: #050706;
  transform: translateY(-150%);
}

.skip:focus { transform: none; }

header {
  display: flex;
  min-height: 74px;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
}

.brand,
nav a {
  color: inherit;
  text-decoration: none;
}

.brand { display: flex; align-items: center; gap: 10px; font-size: 12px; letter-spacing: .12em; }
.brand span { display: grid; width: 32px; height: 32px; place-items: center; background: var(--signal); color: #050706; font: 800 11px Consolas, monospace; }
nav { display: flex; gap: 22px; color: var(--muted); font-size: 12px; }
nav a:hover, nav a:focus-visible { color: var(--signal); }

main {
  display: grid;
  min-height: calc(100vh - 74px);
  grid-template-columns: minmax(0, 1fr) minmax(400px, .9fr);
}

.intro,
.test-card { padding: clamp(48px, 8vw, 110px) clamp(24px, 6vw, 90px); }
.intro { border-right: 1px solid var(--line); }
.eyebrow { color: var(--signal); font: 700 10px Consolas, monospace; letter-spacing: .14em; }
h1 { max-width: 760px; margin: 30px 0; font-size: clamp(48px, 7vw, 104px); line-height: .88; letter-spacing: -.06em; }
.intro > p:not(.eyebrow) { max-width: 620px; color: #aab1a8; font-size: 17px; line-height: 1.65; }
.boundary { display: grid; max-width: 620px; grid-template-columns: 150px 1fr; gap: 24px; padding: 19px 0; border-top: 1px solid var(--line); font-size: 12px; line-height: 1.5; }
.boundary strong { color: var(--signal); font: 700 9px Consolas, monospace; letter-spacing: .08em; text-transform: uppercase; }
.boundary span { color: var(--muted); }
.powered { display: flex; align-items: center; gap: 14px; margin-top: 44px; color: var(--muted); font: 700 9px Consolas, monospace; letter-spacing: .1em; text-transform: uppercase; }
.powered img { width: 145px; filter: invert(1); opacity: .75; }
.test-card { align-self: center; }
.agent-button,
.modal-button { width: 100%; min-height: 48px; margin: 16px 0 0; border: 1px solid var(--signal); background: transparent; color: var(--signal); cursor: pointer; font-weight: 800; }
.modal-button { margin-top: 10px; border-color: var(--line); color: var(--paper); }
.agent-button:disabled { border-color: var(--line); color: #596058; cursor: not-allowed; }
.agent-button:focus-visible,
.modal-button:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }
.status, .server-note { color: var(--muted); font-size: 12px; line-height: 1.55; }
.result { display: grid; grid-template-columns: 1fr 1fr; margin: 26px 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.result div { padding: 16px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.result dt { margin-bottom: 8px; color: var(--muted); font: 700 8px Consolas, monospace; letter-spacing: .1em; text-transform: uppercase; }
.result dd { margin: 0; overflow-wrap: anywhere; font-size: 12px; }
.server-note { padding-top: 18px; border-top: 1px solid var(--line); }

@media (max-width: 850px) {
  main { grid-template-columns: 1fr; }
  .intro { border-right: 0; border-bottom: 1px solid var(--line); }
  nav { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}