:root {
  --bg: #070c1a;
  --card: #101830;
  --card2: #16203f;
  --text: #eef1ff;
  --muted: #9aa6c8;
  --green: #3ddc84;
  --red: #ff5c6c;
  --gold: #f5c518;
  --line: #232f52;
  --accent: #6ea8ff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
header, main, footer { max-width: 1080px; margin: 0 auto; padding: 20px; }
nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(7, 12, 26, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
nav .inner {
  max-width: 1080px; margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
nav .logo { font-weight: 800; letter-spacing: 0.08em; font-size: 17px; }
nav .logo span { color: var(--gold); }
nav a.nlink { color: var(--muted); font-size: 14px; text-decoration: none; }
nav a.nlink:hover, nav a.nlink.active { color: var(--text); }
nav .right { margin-left: auto; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
nav .status {
  font-size: 12px; color: var(--green);
  border: 1px solid #1e4d33; border-radius: 999px; padding: 3px 10px;
}
.btn {
  display: inline-block; background: var(--gold); color: #111;
  padding: 11px 18px; border-radius: 12px; font-weight: 700;
  border: 0; cursor: pointer; text-decoration: none;
  box-shadow: 0 6px 20px rgba(245, 197, 24, 0.22);
}
.btn:hover { text-decoration: none; filter: brightness(1.05); }
.btn2 {
  background: var(--card2); color: var(--text);
  border: 1px solid var(--line); box-shadow: none;
}
.btn-sm { padding: 8px 14px; font-size: 13px; }
.hero { padding: 40px 20px 12px; }
.eyebrow { font-size: 12px; letter-spacing: 0.14em; color: var(--gold); font-weight: 700; }
h1 { font-size: clamp(34px, 6.5vw, 58px); line-height: 1.05; margin: 12px 0; letter-spacing: -0.02em; }
h2 { margin-top: 36px; font-size: 24px; letter-spacing: -0.01em; }
h3 { margin: 0 0 8px; font-size: 17px; }
p { color: var(--muted); }
p.lead { color: var(--text); font-size: 18px; max-width: 720px; }
.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px; margin: 24px 0 8px;
}
.stat {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 14px 16px;
}
.stat b { display: block; font-size: 22px; color: var(--gold); }
.stat span { font-size: 13px; color: var(--muted); }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 18px; margin: 14px 0;
}
.grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 12px;
}
.small { font-size: 13px; color: var(--muted); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
.label {
  font-size: 11px; letter-spacing: 0.12em; color: var(--gold);
  font-weight: 700; margin: 28px 0 8px;
}
.product {
  background: linear-gradient(180deg, #12204a, #0d1730);
  border: 1px solid #2c3f74; border-radius: 20px; padding: 22px; margin-top: 12px;
}
input, textarea, select {
  width: 100%; background: var(--card2); border: 1px solid var(--line);
  color: var(--text); border-radius: 10px; padding: 10px; margin: 6px 0 12px; font: inherit;
}
button {
  background: var(--gold); color: #111; border: 0; border-radius: 10px;
  padding: 11px 16px; font-weight: 700; cursor: pointer;
}
button.ghost { background: var(--card2); color: var(--text); border: 1px solid var(--line); }
.out {
  background: #0a1228; border: 1px solid var(--line); border-radius: 12px;
  padding: 12px; min-height: 60px; white-space: pre-wrap; font-size: 13px;
}
.tag {
  display: inline-block; background: var(--card2); border: 1px solid var(--line);
  border-radius: 999px; padding: 3px 10px; font-size: 12px; color: var(--muted); margin-right: 6px;
}
.tag.win { color: var(--green); border-color: #1e4d33; }
.tag.loss { color: var(--red); border-color: #4d1e24; }
/* Selectable NFT card (marketplace "list your NFT" picker). Tapping a
   card picks that token to list, so the owner never has to remember
   its id. */
.pick { cursor: pointer; transition: border-color .15s, box-shadow .15s; }
.pick:hover { border-color: var(--gold); }
.pick.selected { border-color: var(--gold); box-shadow: 0 0 0 2px var(--gold); }
.pick.selected .tag.pick-tag { color: var(--gold); border-color: var(--gold); }
.arena-board {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; align-items: stretch;
}
@media (max-width: 700px) {
  .arena-board { grid-template-columns: 1fr; }
}
.vs {
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: var(--gold); font-size: 20px;
}
.agent-card {
  background: var(--card2); border: 1px solid var(--line);
  border-radius: 14px; padding: 16px;
}
.agent-card h3 { margin-top: 0; }
.score { font-size: 28px; font-weight: 800; color: var(--gold); }
footer {
  border-top: 1px solid var(--line); margin-top: 40px;
  padding: 24px 20px; color: var(--muted); font-size: 13px;
}
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li {
  counter-increment: step; position: relative;
  padding: 14px 14px 14px 54px; margin: 10px 0;
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
}
.steps li::before {
  content: counter(step); position: absolute; left: 14px; top: 14px;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--gold); color: #111; font-weight: 800;
  display: flex; align-items: center; justify-content: center; font-size: 13px;
}

/* Hamburger menu (phones): a dark circular button, the same look as the
   one in the screenshot. On desktop the links stay inline in the bar and
   the button is hidden. */
.menu-btn {
  display: none;
  width: 44px; height: 44px; border-radius: 50%;
  background: #1c2338; border: 1px solid var(--line); color: var(--text);
  font-size: 20px; line-height: 1; padding: 0; cursor: pointer;
  align-items: center; justify-content: center; flex: 0 0 auto;
  box-shadow: none;
}
.mobile-menu { display: none; }
@media (max-width: 900px) {
  nav .inner { gap: 10px; }
  /* The inline links and the status/wallet row move into the menu. */
  nav a.nlink, nav .right { display: none; }
  .menu-btn { display: inline-flex; margin-left: auto; }
  .mobile-menu {
    display: none;
    border-top: 1px solid var(--line);
    padding: 6px 20px 14px;
    background: rgba(7, 12, 26, 0.98);
  }
  .mobile-menu.open { display: block; }
  .mobile-menu a.mlink {
    display: block; padding: 12px 2px; font-size: 16px;
    color: var(--text); text-decoration: none;
    border-bottom: 1px solid var(--line);
  }
  .mobile-menu a.mlink.active { color: var(--gold); }
  .mobile-menu .status { margin: 12px 0 10px; display: inline-block; }
  .mobile-menu .btn { width: 100%; text-align: center; }
}
/* Phones and desktop: content never stretches past a readable width,
   and nothing on the page forces horizontal scrolling. */
img, video, canvas, svg { max-width: 100%; height: auto; }
@media (max-width: 700px) {
  header, main, footer { padding: 16px; }
  .hero { padding: 28px 16px 8px; }
  h1 { font-size: clamp(30px, 9vw, 40px); }
}