/* Ant-swarm project page — light, minimal, technical. */
:root {
  --ink: #18181b;
  --muted: #6b7280;
  --faint: #9aa1ab;
  --paper: #fafafa;
  --surface: #ffffff;
  --line: #e6e8ec;
  --teal: #00bb7f;
  --cyan: #00b7d7;
  --violet: #8d54ff;
  --red: #ff2357;
  --amber: #f99c00;
  --shadow: 0 18px 50px rgba(24, 30, 45, 0.08);
  --max: 940px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Geist, Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 1.02rem;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

img, video { display: block; max-width: 100%; }
a { color: var(--ink); text-decoration-color: rgba(0, 183, 215, .5); text-underline-offset: 3px; }
a:hover { color: var(--cyan); }

.mono {
  font-family: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------------------------------------------------------------- topbar */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; justify-content: space-between; align-items: center; gap: 18px;
  padding: 14px clamp(18px, 4vw, 32px);
  background: rgba(250, 250, 250, .86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.topbar .inner {
  display: flex; justify-content: space-between; align-items: center;
  gap: 18px; width: 100%; max-width: var(--max); margin: 0 auto;
}
.mark {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: .82rem; letter-spacing: .14em; text-transform: uppercase;
  text-decoration: none; color: var(--ink);
}
.topbar nav { display: flex; gap: 20px; flex-wrap: wrap; }
.topbar nav a {
  font-size: .84rem; color: var(--muted); text-decoration: none;
}
.topbar nav a:hover { color: var(--ink); }

/* ------------------------------------------------------------------ hero */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 clamp(18px, 4vw, 32px); }

.hero { padding: clamp(48px, 8vw, 96px) 0 clamp(24px, 4vw, 40px); }
.eyebrow {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: .78rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--teal); margin: 0 0 18px;
}
.hero h1 {
  margin: 0; font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.08;
  letter-spacing: -.02em; font-weight: 650;
}
.lede { margin: 22px 0 0; font-size: 1.14rem; color: var(--muted); max-width: 62ch; }
.byline {
  margin: 20px 0 0; font-family: "Geist Mono", ui-monospace, monospace;
  font-size: .8rem; color: var(--faint);
}
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 0; }
.button {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface); color: var(--ink); text-decoration: none;
  font-size: .9rem; transition: border-color .15s, transform .15s;
}
.button:hover { border-color: var(--cyan); transform: translateY(-1px); color: var(--ink); }
.button--primary { background: var(--ink); color: #fff; border-color: var(--ink); }
.button--primary:hover { background: #000; color: #fff; }

/* --------------------------------------------------------------- section */
.section { padding: clamp(30px, 5vw, 54px) 0; border-top: 1px solid var(--line); }
.section > h2 {
  margin: 0 0 8px; font-size: clamp(1.4rem, 2.6vw, 1.85rem);
  line-height: 1.2; letter-spacing: -.01em; font-weight: 620;
}
.section > h2 .num {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: .75em; color: var(--cyan); margin-right: .5em;
}
.section h3 {
  margin: 34px 0 6px; font-size: 1.08rem; font-weight: 620;
}
.section p { margin: 14px 0; }
.section p strong, .section li strong { font-weight: 620; }
em { color: var(--ink); }

/* ---------------------------------------------------------------- figures */
figure { margin: 30px 0; }
figure img, figure video {
  width: 100%; border: 1px solid var(--line); border-radius: 14px;
  background: var(--surface); box-shadow: var(--shadow);
}
figcaption {
  margin-top: 12px; font-size: .9rem; color: var(--muted); line-height: 1.6;
}
.figure-row {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin: 30px 0;
}
.figure-row figure { margin: 0; }
.figure-row figcaption { font-size: .84rem; margin-top: 10px; }
.figure-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 30px 0; }
.figure-pair figure { margin: 0; }
@media (max-width: 720px) {
  .figure-row, .figure-pair { grid-template-columns: 1fr; }
}

/* ----------------------------------------------------------------- tables */
table {
  width: 100%; border-collapse: collapse; margin: 24px 0;
  font-size: .94rem; background: var(--surface);
  border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
}
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); }
thead th {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: .76rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--muted); background: #f6f7f9; font-weight: 500;
}
tbody tr:last-child td { border-bottom: 0; }
td.num, th.num { font-family: "Geist Mono", ui-monospace, monospace; }
.fail { color: var(--red); font-family: "Geist Mono", ui-monospace, monospace; }
.pass { color: var(--teal); font-family: "Geist Mono", ui-monospace, monospace; }

/* ------------------------------------------------------------------- code */
pre {
  margin: 22px 0; padding: 16px 18px; overflow-x: auto;
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  font-family: "Geist Mono", ui-monospace, monospace; font-size: .87rem; line-height: 1.6;
}
code {
  font-family: "Geist Mono", ui-monospace, monospace; font-size: .9em;
  background: #f2f4f7; padding: .12em .4em; border-radius: 5px;
}
pre code { background: none; padding: 0; }

/* ---------------------------------------------------------------- callout */
.callout {
  margin: 26px 0; padding: 18px 20px; border-radius: 14px;
  background: var(--surface); border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
}
.callout p { margin: 0; }
.callout--result { border-left-color: var(--teal); }
.callout--fail { border-left-color: var(--red); }

.result-number {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: clamp(1.5rem, 3.6vw, 2.2rem); font-weight: 600; color: var(--teal);
  display: block; line-height: 1.2;
}

/* ----------------------------------------------------------------- footer */
.footer {
  border-top: 1px solid var(--line); margin-top: 40px;
  padding: 30px clamp(18px, 4vw, 32px) 60px;
  color: var(--muted); font-size: .9rem;
}
.footer .inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap;
}
.footer a { color: var(--muted); text-decoration: none; margin-left: 16px; }
.footer a:hover { color: var(--ink); }

/* ---------------------------------------------------------------- sandbox */
.sandbox { margin: 30px 0 18px; }
.sandbox iframe {
  width: 100%; height: 760px; border: 1px solid var(--line);
  border-radius: 14px; background: #1e1e1e; box-shadow: var(--shadow);
}
@media (max-width: 720px) {
  .sandbox iframe { height: 560px; }
}