:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --ink: #0f172a;
  --ink-soft: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --accent: #2563eb;
  --accent-deep: #1e3a8a;
  --accent-muted: #dbeafe;
  --radius: 16px;
  --shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
  --max: 720px;
  --font: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, #dbeafe 0%, transparent 55%),
    radial-gradient(900px 400px at 100% 0%, #eff6ff 0%, transparent 50%),
    var(--bg);
  line-height: 1.6;
  min-height: 100vh;
}

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

.wrap {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
}

.site-header {
  padding: 1.25rem 0 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand:hover { text-decoration: none; }

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
  display: block;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.28);
  background: #1e3a8a;
}

.mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(145deg, #2563eb, #1e3a8a);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--muted);
}

.nav a { color: var(--ink-soft); }

.hero {
  margin: 2rem 0 1.5rem;
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
}

.hero h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: var(--accent-muted);
  color: var(--accent-deep);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.9rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 4px 18px rgba(15, 23, 42, 0.04);
}

.card h2 {
  margin: 0 0 0.7rem;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.card p, .card li {
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.card ul { padding-left: 1.2rem; margin: 0.4rem 0 0; }
.card li { margin: 0.35rem 0; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.85rem 1.15rem;
  border-radius: 999px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover { text-decoration: none; filter: brightness(1.03); }

.btn-primary {
  background: linear-gradient(145deg, #2563eb, #1e3a8a);
  color: #fff;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.35);
}

.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
}

.code-box {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  background: #0f172a;
  color: #fff;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 1.15rem;
  letter-spacing: 0.08em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.code-box button {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: 0;
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  font-weight: 700;
  cursor: pointer;
}

.muted { color: var(--muted); }
.small { font-size: 0.9rem; }

.site-footer {
  margin: 2.5rem 0 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  justify-content: space-between;
}

.legal-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

@media (max-width: 640px) {
  .hero { padding: 1.4rem; }
  .site-header { align-items: flex-start; flex-direction: column; }
}