:root {
  --bg: #f7f8f6;
  --surface: #ffffff;
  --surface-2: #eef1ec;
  --text: #1c2420;
  --muted: #5b675f;
  --border: #d9dfd8;
  --accent: #2f7d5b;
  --accent-2: #c2662d;
  --accent-soft: #e2efe8;
  --code-bg: #1d2521;
  --code-text: #e6ece8;
  --radius: 10px;
  --max: 1080px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121714;
    --surface: #1a211d;
    --surface-2: #222b26;
    --text: #e3e9e5;
    --muted: #9aa8a0;
    --border: #2f3a34;
    --accent: #5fbf91;
    --accent-2: #e8935a;
    --accent-soft: #1f3329;
    --code-bg: #0c100e;
    --code-text: #dbe4de;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }
code { font-size: .88em; background: var(--surface-2); padding: .1em .35em; border-radius: 4px; }

pre {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 16px 18px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: .86rem;
  line-height: 1.55;
}
pre code { background: none; padding: 0; color: inherit; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }

/* ---- header ---- */
header.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
header.top .wrap { display: flex; align-items: center; gap: 24px; height: 56px; }
.brand { font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 8px; }
.brand svg { color: var(--accent); }
nav.links { display: flex; gap: 18px; margin-left: auto; font-size: .92rem; }
nav.links a { color: var(--muted); }
nav.links a:hover { color: var(--text); text-decoration: none; }
@media (max-width: 720px) { nav.links a.opt { display: none; } }

/* ---- hero ---- */
.hero { padding: 72px 0 40px; }
.eyebrow { color: var(--accent); font-weight: 600; font-size: .85rem; letter-spacing: .06em; text-transform: uppercase; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.12; margin: 10px 0 16px; letter-spacing: -.02em; }
.hero p.lead { font-size: 1.15rem; color: var(--muted); max-width: 720px; margin: 0 0 28px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 10px 18px; border-radius: 8px; font-weight: 600;
  border: 1px solid var(--border); color: var(--text); background: var(--surface);
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn:hover { text-decoration: none; filter: brightness(1.05); }

.shot {
  margin: 40px 0 0; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; background: var(--surface);
}
.shot img { display: block; width: 100%; height: auto; }
.shot figcaption { padding: 10px 14px; font-size: .88rem; color: var(--muted); border-top: 1px solid var(--border); }

/* ---- sections ---- */
section { padding: 56px 0; border-top: 1px solid var(--border); }
section h2 { font-size: 1.75rem; margin: 0 0 8px; letter-spacing: -.01em; }
section p.sub { color: var(--muted); margin: 0 0 28px; max-width: 720px; }

.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px;
}
.card h3 { margin: 0 0 6px; font-size: 1.02rem; }
.card p { margin: 0; color: var(--muted); font-size: .94rem; }
.card .tag {
  display: inline-block; font-size: .72rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em;
  padding: 2px 8px; border-radius: 999px; margin-bottom: 8px;
  background: var(--accent-soft); color: var(--accent);
}
.card .tag.new { background: color-mix(in srgb, var(--accent-2) 16%, transparent); color: var(--accent-2); }
.card.star { border-color: var(--accent); }

/* ---- architecture diagram ---- */
.arch { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; overflow-x: auto; }
.arch svg { display: block; min-width: 680px; width: 100%; height: auto; }
.arch .box { fill: var(--surface-2); stroke: var(--border); }
.arch .box.ai { fill: var(--accent-soft); stroke: var(--accent); }
.arch .lbl { fill: var(--text); font: 600 13px Inter, system-ui, sans-serif; }
.arch .sm { fill: var(--muted); font: 11.5px Inter, system-ui, sans-serif; }
.arch .ln { stroke: var(--muted); stroke-width: 1.4; fill: none; marker-end: url(#arr); }
.arch #arr path { fill: var(--muted); }

/* ---- tables ---- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: .93rem; background: var(--surface); }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--surface-2); font-weight: 600; }
tr:last-child td { border-bottom: none; }

/* ---- roadmap timeline ---- */
.phases { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.phase {
  display: grid; grid-template-columns: 64px 1fr auto; gap: 16px; align-items: start;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px;
}
.phase .num {
  font-weight: 700; font-size: 1.4rem; color: var(--accent);
  width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center;
  background: var(--accent-soft);
}
.phase h3 { margin: 0 0 4px; font-size: 1.02rem; }
.phase p { margin: 0; color: var(--muted); font-size: .93rem; }
.phase .est { font-size: .82rem; color: var(--muted); white-space: nowrap; padding-top: 4px; }
@media (max-width: 600px) {
  .phase { grid-template-columns: 1fr; }
  .phase .est { padding-top: 0; }
}

.note {
  border-left: 3px solid var(--accent-2); background: var(--surface); padding: 12px 16px;
  border-radius: 0 var(--radius) var(--radius) 0; color: var(--muted); font-size: .94rem; margin-top: 20px;
}

footer { border-top: 1px solid var(--border); padding: 28px 0 40px; color: var(--muted); font-size: .88rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; }