:root {
  --bg: #0a0b10;
  --bg-2: #0f111a;
  --fg: #e7e9f0;
  --muted: #8b8fa3;
  --accent: #7c5cff;
  --accent-2: #34d3a6;
  --card: #14161f;
  --border: #222634;
  --warn: #ffb454;
  --danger: #ff6b6b;
  --radius: 14px;
  --maxw: 960px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

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

code, pre, .mono {
  font-family: ui-monospace, "JetBrains Mono", "Fira Code", monospace;
}

pre {
  background: #0b0d15;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  overflow: auto;
  font-size: 0.86rem;
}

code { background: #0b0d15; border: 1px solid var(--border); border-radius: 6px; padding: 1px 6px; font-size: 0.86em; }
pre code { background: none; border: 0; padding: 0; }

/* ---- top navigation ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 14px 24px;
  background: rgba(10, 11, 16, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.02em; }
.nav .brand img { height: 26px; width: 26px; border-radius: 6px; }
.nav a.link { color: var(--muted); font-weight: 500; }
.nav a.link:hover { color: var(--fg); text-decoration: none; }
.nav .spacer { flex: 1; }
.nav .cta {
  background: var(--accent); color: #fff; padding: 8px 16px; border-radius: 10px; font-weight: 600;
}
.nav .cta:hover { text-decoration: none; filter: brightness(1.1); }

/* ---- layout ---- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 24px 80px; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.hero {
  text-align: center;
  padding: 72px 24px 40px;
  background:
    radial-gradient(1200px 400px at 50% -10%, rgba(124, 92, 255, 0.18), transparent 60%),
    radial-gradient(900px 300px at 80% 10%, rgba(52, 211, 166, 0.10), transparent 60%);
}
.hero img.banner { max-width: 520px; width: 100%; height: auto; }
.hero h1 { font-size: 2.6rem; margin: 18px 0 6px; letter-spacing: 0.01em; }
.hero .tag { color: var(--muted); font-size: 1.15rem; max-width: 620px; margin: 0 auto; }
.hero .btns { margin-top: 28px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block; border: 0; border-radius: 10px; cursor: pointer;
  padding: 13px 24px; font-size: 1rem; font-weight: 600; text-align: center;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.1); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--fg); border: 1px solid var(--border); }
.btn.ghost:hover { border-color: var(--accent); text-decoration: none; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.section-title { font-size: 1.7rem; margin: 56px 0 6px; }
.section-sub { color: var(--muted); margin: 0 0 24px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px;
}
.card h3 { margin: 0 0 6px; font-size: 1.12rem; display: flex; align-items: center; gap: 8px; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.card .pill { font-size: 0.72rem; color: var(--accent-2); border: 1px solid var(--border); border-radius: 999px; padding: 2px 8px; }

.callout {
  border-left: 3px solid var(--accent); background: var(--bg-2);
  border-radius: 0 10px 10px 0; padding: 14px 18px; margin: 18px 0;
}
.callout.warn { border-left-color: var(--warn); }
.callout.danger { border-left-color: var(--danger); }
.callout .lbl { font-weight: 700; }
.callout.warn .lbl { color: var(--warn); }
.callout.danger .lbl { color: var(--danger); }

footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; padding: 32px 24px; text-align: center; }
footer a { color: var(--muted); }

/* ---- docs layout ---- */
.docs { display: grid; grid-template-columns: 220px 1fr; gap: 36px; align-items: start; }
.docs .side { position: sticky; top: 70px; }
.docs .side a { display: block; color: var(--muted); padding: 6px 0; }
.docs .side a.active, .docs .side a:hover { color: var(--fg); text-decoration: none; }
.docs .side .group { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: #5c6072; margin: 18px 0 4px; }
.docs article h1 { margin-top: 0; }
.docs article h2 { margin-top: 36px; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.docs article table { border-collapse: collapse; width: 100%; margin: 14px 0; }
.docs article th, .docs article td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; font-size: 0.92rem; }
.docs article th { background: var(--bg-2); }

.log {
  font-family: ui-monospace, monospace; font-size: 0.84rem; color: var(--muted);
  white-space: pre-wrap; margin-top: 16px; max-height: 260px; overflow: auto;
  background: #0b0d15; border: 1px solid var(--border); border-radius: 10px; padding: 12px;
}
.progress { height: 10px; background: #0b0d15; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; margin-top: 14px; }
.progress > i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width 0.25s; }

@media (max-width: 760px) {
  .docs { grid-template-columns: 1fr; }
  .docs .side { position: static; }
  .hero h1 { font-size: 2rem; }
}