:root {
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --ink: #0f172a;
  --text: #1f2937;
  --muted: #64748b;
  --border: #e5e7eb;
  --accent: #2563eb;
  --accent-ink: #1d4ed8;
  --logo: #f5c518;
  --radius: 14px;
  --shadow: 0 24px 60px -20px rgba(15, 23, 42, 0.28);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 500px at 50% -200px, #eef2ff 0%, rgba(238, 242, 255, 0) 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
h1, h2 { color: var(--ink); letter-spacing: -0.02em; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  text-decoration: none; font-weight: 600; font-size: 0.95rem;
  padding: 0.72rem 1.3rem; border-radius: 10px; border: 1px solid transparent;
  transition: transform 0.08s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 10px 24px -8px rgba(37, 99, 235, 0.6);
}
.btn-primary:hover { background: var(--accent-ink); transform: translateY(-1px); }
.btn-ghost { color: var(--ink); border-color: var(--border); background: #fff; }
.btn-ghost:hover { border-color: var(--muted); }

/* ---- Nav ---- */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1120px; margin: 0 auto; padding: 1.1rem 1.5rem;
}
.brand { font-weight: 700; font-size: 1.05rem; display: inline-flex; align-items: center; gap: 0.55rem; color: var(--ink); }
.brand.small { font-size: 0.95rem; }
.brand-dot {
  width: 20px; height: 20px; border-radius: 50%;
  background: #0b1220; box-shadow: inset 0 0 0 5px var(--logo);
}

/* ---- Hero ---- */
.hero {
  max-width: 1120px; margin: 0 auto; padding: 3.5rem 1.5rem 3rem;
  display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center;
}
.badge {
  display: inline-block; font-size: 0.8rem; font-weight: 600; color: var(--accent-ink);
  background: #eff2ff; border: 1px solid #dbe3ff; padding: 0.25rem 0.7rem; border-radius: 999px;
}
.hero h1 { font-size: clamp(2.2rem, 4.5vw, 3.4rem); line-height: 1.08; margin: 1.1rem 0 0.9rem; }
.accent { color: var(--accent); }
.tagline { font-size: 1.12rem; color: var(--muted); margin: 0 0 1.6rem; max-width: 34rem; }
.hero-actions { display: flex; gap: 0.8rem; flex-wrap: wrap; }
.hero-note { color: var(--muted); font-size: 0.85rem; margin-top: 1rem; }

/* ---- App mockup ---- */
.mock {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: #fff; box-shadow: var(--shadow); overflow: hidden; font-size: 11px;
}
.mock-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 12px; border-bottom: 1px solid var(--border); background: var(--bg-soft);
}
.dot { width: 9px; height: 9px; border-radius: 50%; }
.dot.r { background: #ff5f57; } .dot.y { background: #febc2e; } .dot.g { background: #28c840; }
.mock-title { margin-left: 8px; color: var(--muted); font-weight: 600; }
.mock-body { display: grid; grid-template-columns: 92px 1fr 84px; min-height: 220px; }
.mock-tree { border-right: 1px solid var(--border); padding: 8px 6px; color: var(--muted); display: grid; gap: 4px; align-content: start; }
.mock-db { color: var(--ink); font-weight: 600; }
.mock-schema { padding-left: 8px; }
.mock-table { padding-left: 14px; }
.mock-table.active { background: #eef2ff; color: var(--accent-ink); border-radius: 5px; }
.mock-center { padding: 8px; border-right: 1px solid var(--border); display: grid; gap: 8px; align-content: start; }
.mock-sql { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 6px; padding: 8px; color: var(--ink); }
.mock-sql .k { color: var(--accent); font-weight: 700; }
.mock-grid { border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.mock-row { display: grid; grid-template-columns: repeat(4, 1fr); }
.mock-row span { padding: 5px 8px; border-bottom: 1px solid #f1f5f9; text-align: right; font-variant-numeric: tabular-nums; }
.mock-row.mock-head span { background: var(--bg-soft); color: var(--muted); font-weight: 600; text-align: left; }
.mock-diag { padding: 8px 6px; display: grid; gap: 8px; align-content: start; }
.mock-col { display: grid; gap: 3px; color: var(--muted); }
.mock-col svg { width: 100%; height: 14px; }
.mock-col polyline { fill: none; stroke: #8b5cf6; stroke-width: 1.4; }

/* ---- Features ---- */
.features {
  max-width: 1120px; margin: 2rem auto 1rem; padding: 0 1.5rem;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem;
}
.feature {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.6rem; transition: transform 0.1s ease, box-shadow 0.15s ease;
}
.feature:hover { transform: translateY(-3px); box-shadow: 0 18px 40px -22px rgba(15, 23, 42, 0.35); }
.feature-icon {
  display: inline-flex; width: 42px; height: 42px; border-radius: 11px;
  align-items: center; justify-content: center; color: var(--accent); background: #eff2ff; margin-bottom: 1rem;
}
.feature-icon svg { width: 22px; height: 22px; }
.feature h2 { font-size: 1.12rem; margin: 0 0 0.4rem; }
.feature p { color: var(--muted); margin: 0; font-size: 0.95rem; }

/* ---- Download ---- */
.download {
  max-width: 760px; margin: 4.5rem auto; padding: 3rem 1.5rem;
  text-align: center; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 20px;
}
.download h2 { font-size: 1.8rem; margin: 0 0 0.3rem; }
.download-version { color: var(--muted); margin: 0 0 1.5rem; }
.download-list { display: flex; flex-wrap: wrap; gap: 0.9rem; justify-content: center; }
.dl-btn {
  display: inline-flex; align-items: center; gap: 0.5rem; min-width: 140px; justify-content: center;
  text-decoration: none; color: var(--ink); font-weight: 600;
  padding: 0.8rem 1.3rem; border: 1px solid var(--border); border-radius: 11px; background: #fff;
  transition: transform 0.08s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
.dl-btn:hover { transform: translateY(-1px); border-color: var(--muted); }
.dl-btn-current {
  border-color: var(--accent); color: var(--accent-ink);
  box-shadow: 0 10px 24px -12px rgba(37, 99, 235, 0.6);
}
.download-note { color: var(--muted); font-size: 0.85rem; margin-top: 1.4rem; }

/* ---- Footer ---- */
.footer {
  max-width: 1120px; margin: 0 auto; padding: 2rem 1.5rem 3rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; flex-wrap: wrap;
}
.muted { color: var(--muted); }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; gap: 2rem; padding-top: 2rem; }
  .mock { order: 2; }
}