:root {
  --bg: #f4f7f8;
  --card: #ffffff;
  --ink: #1a2a2e;
  --muted: #5a6b70;
  --brand: #2e7d8a;
  --brand-dark: #1f5a64;
  --line: #dde3e6;
  --accent: #f4a259;
}

* { box-sizing: border-box; }

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

a { color: var(--brand-dark); }

.wrap {
  width: min(820px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  background: var(--brand);
  color: #fff;
  padding: 1rem 0;
}

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

.brand {
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
}

.site-header nav {
  display: flex;
  gap: 1rem;
}

.site-header nav a {
  color: #e8f4f6;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.site-header nav a[aria-current="page"],
.site-header nav a:hover {
  color: #fff;
  text-decoration: underline;
}

.doc {
  background: var(--card);
  margin: 1.5rem auto 2.5rem;
  padding: 1.75rem 1.5rem 2rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

h1 {
  margin: 0 0 0.35rem;
  font-size: 1.85rem;
  line-height: 1.25;
  color: var(--brand-dark);
}

h2 {
  margin-top: 1.75rem;
  font-size: 1.2rem;
  color: var(--brand-dark);
}

h3 {
  margin-top: 1.1rem;
  font-size: 1.05rem;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0;
}

.note {
  margin-top: 2rem;
  padding: 0.9rem 1rem;
  background: rgba(244, 162, 89, 0.12);
  border-left: 3px solid var(--accent);
  color: #6a4a1e;
  font-size: 0.92rem;
}

ul { padding-left: 1.25rem; }
li { margin: 0.35rem 0; }

.cards {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}

@media (min-width: 640px) {
  .cards { grid-template-columns: 1fr 1fr; }
}

.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.25rem 1.35rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  border-color: var(--brand);
  box-shadow: 0 4px 14px rgba(46, 125, 138, 0.12);
}

.card h2 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.hero {
  padding: 2.5rem 0 0.5rem;
}

.hero h1 {
  font-size: 2rem;
}

.site-footer {
  padding: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

.site-footer a { color: var(--brand-dark); }

.btn-download {
  display: inline-block;
  background: var(--brand);
  color: #fff !important;
  text-decoration: none;
  font-weight: 700;
  padding: 0.9rem 1.35rem;
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(46, 125, 138, 0.25);
}

.btn-download:hover {
  background: var(--brand-dark);
}

.steps {
  padding-left: 1.25rem;
}

.steps > li {
  margin: 0.85rem 0;
}

code {
  background: #eef3f4;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.92em;
}