:root {
  --bg: #f6f4ef;
  --surface: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --border: #e5e5ea;
  --max-width: 720px;
  --radius: 16px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

.site-header {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff;
  padding: 2.5rem 1.25rem 2rem;
}

.site-header .inner,
.page-main .inner,
.site-footer .inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-header h1 { margin: 0 0 0.35rem; font-size: 1.75rem; font-weight: 700; }
.site-header p { margin: 0; opacity: 0.92; font-size: 1rem; }

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 1.25rem;
  font-size: 0.95rem;
}

.top-nav a { color: #fff; opacity: 0.95; }

.lang-switch {
  display: inline-flex;
  gap: 0.35rem;
  margin-left: auto;
  background: rgba(255, 255, 255, 0.18);
  padding: 0.25rem;
  border-radius: 999px;
}

.lang-switch button {
  border: 0;
  background: transparent;
  color: #fff;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
}

.lang-switch button.active {
  background: #fff;
  color: var(--accent);
  font-weight: 600;
}

.page-main { padding: 1.5rem 1.25rem 3rem; }

.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem;
  margin-bottom: 1.25rem;
}

.card h2 { margin: 0 0 1rem; font-size: 1.35rem; }
.card h3 { margin: 1.5rem 0 0.5rem; font-size: 1.05rem; }
.card p, .card li { color: var(--text); }
.card p, .card ul, .card ol { margin: 0 0 1rem; }
.card ul, .card ol { padding-left: 1.25rem; }

.meta { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1.25rem; }

.link-grid { display: grid; gap: 0.75rem; }

.link-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.15rem;
  background: var(--surface);
  border-radius: 14px;
  box-shadow: var(--shadow);
  color: var(--text);
  transition: transform 0.15s ease;
}

.link-card:hover { transform: translateY(-1px); text-decoration: none; }
.link-card span { color: var(--text-secondary); font-size: 0.9rem; }

.hero-card ul { margin: 0 0 1.25rem; padding-left: 1.25rem; }
.hero-cta { margin: 0; }

.cta-button {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
}

.cta-button:hover { text-decoration: none; opacity: 0.92; }

.site-footer {
  padding: 1.5rem 1.25rem 2.5rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-align: center;
}

[data-lang] { display: none; }
[data-lang].active { display: block; }

@media (min-width: 640px) {
  .site-header h1 { font-size: 2rem; }
  .card { padding: 2rem; }
}