:root {
  --navy: #21293A;
  --navy-deep: #141923;
  --navy-soft: #2d3648;
  --navy-light: #3d4a63;
  --steel: #546e7a;
  --accent: #3d4a63;
  --accent-soft: #eef1f6;
  --link: #21293A;
  --bg: #f5f6f8;
  --card-bg: #ffffff;
  --text: #1a1f2c;
  --muted: #5c6679;
  --border: #e1e4ea;
  --code-bg: #f0f2f5;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  background: var(--card-bg);
  border-radius: 0 0 8px 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.site-header {
  background: var(--navy);
  color: #fff;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.brand { display: flex; flex-direction: column; color: #fff; text-decoration: none; line-height: 1.1; }
.brand-mark { font-size: 1.2rem; font-weight: 700; letter-spacing: -0.01em; }
.brand-tag { font-size: 0.75rem; color: #9aa4b8; font-weight: 500; }
.header-controls { display: flex; gap: 0.75rem; align-items: center; }
.lang-switch {
  color: #fff;
  padding: 0.35rem 0.85rem;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 4px;
  font-size: 0.85rem;
  text-decoration: none;
  transition: background 0.15s;
}
.lang-switch:hover { background: rgba(255,255,255,0.08); text-decoration: none; }

.nav {
  background: var(--navy-deep);
  padding: 0.5rem 2rem;
  display: flex;
  gap: 0.25rem;
  align-items: center;
  flex-wrap: wrap;
  max-width: 1200px;
  margin: 0 auto;
}
.nav a {
  color: #cdd3df;
  padding: 0.45rem 0.9rem;
  border-radius: 4px;
  text-decoration: none;
  font-size: 0.85rem;
  transition: background 0.15s, color 0.15s;
}
.nav a:hover { background: rgba(255,255,255,0.08); color: #fff; text-decoration: none; }
.nav a.active { background: #fff; color: var(--navy); font-weight: 600; }
.nav .pdf {
  margin-left: auto;
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.25);
}
.nav .pdf:hover { background: rgba(255,255,255,0.2); color: #fff; }

h1 { font-size: 2rem; margin-bottom: 0.75rem; color: var(--navy); letter-spacing: -0.02em; }
h2 { font-size: 1.4rem; margin-top: 2.2rem; margin-bottom: 0.85rem; color: var(--navy); border-bottom: 2px solid var(--border); padding-bottom: 0.4rem; }
h3 { font-size: 1.1rem; margin-top: 1.6rem; margin-bottom: 0.55rem; color: var(--navy-soft); }
h4 { font-size: 0.95rem; margin-top: 1.2rem; margin-bottom: 0.4rem; color: var(--navy-soft); text-transform: uppercase; letter-spacing: 0.03em; }
p { margin-bottom: 0.85rem; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
main a { border-bottom: 1px solid transparent; transition: border-color 0.15s; }
main a:hover { border-bottom-color: var(--link); text-decoration: none; }
strong { color: var(--navy); font-weight: 600; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.9rem; }
th, td { border: 1px solid var(--border); padding: 0.55rem 0.8rem; text-align: left; vertical-align: top; }
th { background: var(--navy); color: #fff; font-weight: 600; }
tr:nth-child(even) td { background: #fafbfc; }
code { background: var(--code-bg); padding: 0.15em 0.4em; border-radius: 3px; font-size: 0.88em; color: var(--navy); }
blockquote {
  border-left: 4px solid var(--navy);
  padding: 0.8rem 1.2rem;
  margin: 1.2rem 0;
  background: var(--accent-soft);
  border-radius: 0 4px 4px 0;
}
blockquote p { margin: 0; }
img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin: 1.2rem 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
hr { border: none; border-top: 1px solid var(--border); margin: 1.8rem 0; }
ul, ol { margin: 0.5rem 0 0.85rem 1.6rem; }
li { margin-bottom: 0.3rem; }
.footer {
  max-width: 960px;
  margin: 2rem auto 0;
  padding: 1.2rem 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
}

/* Homepage cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.card {
  padding: 1.2rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover { border-color: var(--navy); transform: translateY(-1px); box-shadow: 0 4px 10px rgba(33,41,58,0.08); }
.card a { color: var(--navy); font-weight: 600; display: flex; align-items: center; gap: 0.65rem; margin-bottom: 0.4rem; }
.card a:hover { color: var(--navy); }
.card p { font-size: 0.88rem; color: var(--muted); margin: 0; padding-left: 2.4rem; }
.card .num { flex: 0 0 auto; width: 28px; height: 28px; line-height: 28px; text-align: center; border-radius: 50%; background: var(--navy); color: #fff; font-size: 0.8rem; font-weight: 600; }

@media print {
  body { background: #fff; }
  .site-header, .nav, .footer { display: none; }
  main { max-width: 100%; padding: 0; box-shadow: none; border-radius: 0; }
  img { max-width: 80%; box-shadow: none; }
  h1, h2, h3 { break-after: avoid; }
}