:root {
  --green: #58cc02;
  --green-ink: #14350c;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #f8fafc;
  --card: #fff;
  --focus: #2563eb;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100dvh;
  font-family: Inter, system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: #15803d; }
a:hover { text-decoration: underline; }
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: #fff;
  padding: 8px 12px;
  z-index: 100;
}
.skip:focus { left: 8px; top: 8px; }

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 64px;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: #16a34a;
  text-decoration: none;
  font-size: 1.05rem;
}
.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}
.brand:hover { text-decoration: none; }

.lang {
  display: flex;
  gap: 8px;
  font-size: 0.9rem;
}
.lang a {
  color: var(--ink);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-weight: 600;
}
.lang a[aria-current='page'] {
  background: #dcfce7;
  border-color: #86efac;
  color: #166534;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(1.55rem, 4vw, 2rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.lead {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 1.05rem;
}

.toc {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
  margin-bottom: 28px;
}
.toc h2 {
  margin: 0 0 10px;
  font-size: 0.95rem;
}
.toc ol {
  margin: 0;
  padding-left: 1.2rem;
}
.toc li { margin: 6px 0; }
.toc a { color: var(--ink); font-weight: 600; text-decoration: none; }
.toc a:hover { color: #15803d; text-decoration: underline; }

.cat {
  margin: 32px 0 12px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

article.qa {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 18px 16px;
  margin-bottom: 14px;
}

article.qa h2 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  line-height: 1.35;
}

article.qa p { margin: 0 0 12px; }
article.qa p:last-child { margin-bottom: 0; }
article.qa ul {
  margin: 0 0 12px;
  padding-left: 1.2rem;
}
article.qa li { margin: 4px 0; }

.note {
  font-size: 0.92rem;
  color: var(--muted);
}

.sources {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.sources h2 {
  margin: 0 0 10px;
  font-size: 1.05rem;
}
.sources ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.92rem;
}
.sources li { margin: 6px 0; }

.cta {
  margin-top: 28px;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 14px;
  padding: 18px;
}
.cta h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}
.cta p {
  margin: 0 0 14px;
  color: var(--muted);
}
.cta-btn {
  display: inline-block;
  background: var(--green);
  color: var(--green-ink);
  font-weight: 800;
  text-decoration: none;
  padding: 12px 16px;
  border-radius: 12px;
}
.cta-btn:hover { text-decoration: none; filter: brightness(0.97); }

.footer {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}
.footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-bottom: 10px;
}
.footer a { color: var(--muted); }

@media (max-width: 520px) {
  article.qa { padding: 16px 14px; }
}