:root {
  --bg: #f6f8ff;
  --surface: #ffffff;
  --border: #e2e8f5;
  --text: #1b2130;
  --muted: #5a6579;
  --primary: #2f6bff;
  --primary-dark: #1f4fd1;
  --primary-soft: #eaf0ff;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(31, 79, 209, 0.08);
  --maxw: 960px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(246, 248, 255, 0.85);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  font-size: 1.05rem;
}

.brand img { width: 28px; height: 28px; border-radius: 6px; }

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.95rem;
}

.nav-links {
  display: inline-flex;
  align-items: center;
  gap: 22px;
}
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); text-decoration: none; }

.lang-switch { display: flex; gap: 8px; align-items: center; }
.lang-switch a {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}
.lang-switch a[aria-current="true"] {
  background: var(--primary-soft);
  border-color: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 600;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.05s ease, background 0.15s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-outline { background: transparent; color: var(--primary-dark); border-color: var(--border); }
.btn-outline:hover { background: var(--primary-soft); }

/* Hero */
.hero {
  padding: 72px 0 48px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.hero h1 .hero-kicker {
  display: block;
  text-transform: uppercase;
  color: var(--primary);
  letter-spacing: 0.02em;
}
.hero .subtitle {
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  color: var(--muted);
  max-width: 640px;
  margin: 0 0 28px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* Sections */
section { padding: 40px 0; }
section h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}
.card p { margin: 0; color: var(--muted); }
.card .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-soft);
  margin-bottom: 14px;
  font-size: 1.3rem;
}
.icon svg { width: 24px; height: 24px; fill: var(--primary-dark); display: block; }

/* Blog */
.breadcrumb { font-size: 0.85rem; color: var(--muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--muted); }
.article-meta { color: var(--muted); font-size: 0.9rem; margin: -4px 0 28px; }
a.card { display: block; color: inherit; }
a.card:hover { text-decoration: none; border-color: var(--primary); transform: translateY(-2px); }
a.card .article-meta { margin: 8px 0 0; }
.disclaimer {
  background: var(--primary-soft);
  border-radius: 12px;
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--muted);
  margin: 32px 0;
}
.cta-block { margin-top: 28px; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.95rem;
}
.prose th, .prose td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
}
.prose th { background: var(--primary-soft); font-weight: 600; }
.table-scroll { overflow-x: auto; }

/* Prose (privacy) */
.prose { max-width: 760px; }
.prose h2 { margin-top: 36px; font-size: 1.4rem; }
.prose h3 { margin-top: 26px; margin-bottom: 6px; font-size: 1.08rem; }
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 28px 0;
}
.toc strong { display: block; margin-bottom: 10px; }
.toc ol { margin: 0; padding-left: 20px; }
.toc li { margin-bottom: 5px; }
.toc a { color: var(--muted); }
.toc a:hover { color: var(--primary-dark); }
.prose p, .prose ul { color: var(--text); }
.prose .updated { color: var(--muted); font-size: 0.9rem; }
.prose ul { padding-left: 20px; }
.prose li { margin-bottom: 6px; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 40px;
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
}
.site-footer nav { display: flex; gap: 18px; flex-wrap: wrap; }

@media (max-width: 600px) {
  .nav .nav-links { display: none; }
  .hero { padding: 48px 0 32px; }
}