:root {
  --navy: #0b1f3a;
  --teal: #0e8f8b;
  --muted: #5a6b7d;
  --line: #d8e0ea;
  --bg: #f4f7fb;
  --max: 760px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: Manrope, system-ui, sans-serif;
  background: var(--bg);
  color: #0e1a2b;
  line-height: 1.65;
  font-size: 17px;
}
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: rgba(244,247,251,.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--navy); }
.brand img { width: 36px; height: 36px; border-radius: 10px; }
.nav { display: flex; gap: 18px; font-size: 14px; font-weight: 600; color: var(--muted); }
.nav a { color: inherit; text-decoration: none; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 18px; border-radius: 999px; font-weight: 700; font-size: 14px;
  background: var(--teal); color: #fff !important; text-decoration: none !important;
}
.hero-blog {
  background: linear-gradient(160deg, #0b1f3a, #153456);
  color: #fff; padding: 56px 0 48px;
}
.hero-blog .kicker {
  font-size: 13px; font-weight: 800; letter-spacing: .06em;
  text-transform: uppercase; color: #7fdad7; margin-bottom: 12px;
}
.hero-blog h1 {
  font-size: clamp(28px, 4vw, 42px); line-height: 1.15;
  letter-spacing: -.03em; font-weight: 800; max-width: 18ch; margin-bottom: 14px;
}
.hero-blog p { color: rgba(255,255,255,.78); max-width: 52ch; font-size: 18px; }
.article-page { padding: 40px 0 80px; }
.article-card {
  max-width: var(--max); margin: 0 auto;
  background: #fff; border: 1px solid var(--line); border-radius: 22px;
  padding: 36px 40px; box-shadow: 0 12px 40px rgba(11,31,58,.06);
}
.meta { font-size: 13px; color: var(--muted); margin-bottom: 22px; }
.prose h2 {
  font-size: 24px; color: var(--navy); margin: 32px 0 12px;
  letter-spacing: -.02em; font-weight: 800;
}
.prose h3 {
  font-size: 18px; color: var(--navy); margin: 22px 0 10px; font-weight: 800;
}
.prose p { margin: 0 0 14px; color: #243447; }
.prose ul, .prose ol { margin: 0 0 16px 1.2em; color: #243447; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--navy); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }
.prose pre, .prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
}
.prose pre {
  background: #0b1f3a; color: #e8eef6; padding: 16px 18px;
  border-radius: 14px; overflow-x: auto; margin: 16px 0 20px;
  white-space: pre-wrap;
}
.prose table {
  width: 100%; border-collapse: collapse; margin: 16px 0 22px; font-size: 15px;
}
.prose th, .prose td {
  border: 1px solid var(--line); padding: 10px 12px; text-align: left;
}
.prose th { background: #f4f7fb; color: var(--navy); }
.cta-box {
  margin-top: 36px; padding: 22px; border-radius: 16px;
  background: linear-gradient(135deg, #0b1f3a, #153456); color: #fff;
}
.cta-box p { color: rgba(255,255,255,.82); margin-bottom: 14px; }
.cta-box .btn { background: #0e8f8b; }
.source {
  margin-top: 18px; font-size: 13px; color: var(--muted);
}
.list-grid {
  display: grid; grid-template-columns: 1fr; gap: 14px;
  max-width: 820px; margin: 28px auto 0;
}
.list-card {
  background: #fff; border: 1px solid var(--line); border-radius: 18px;
  padding: 22px 24px; text-decoration: none; color: inherit;
  transition: .15s ease;
}
.list-card:hover { border-color: #0e8f8b; text-decoration: none; transform: translateY(-1px); }
.list-card .tag {
  font-size: 12px; font-weight: 800; letter-spacing: .05em;
  text-transform: uppercase; color: var(--teal); margin-bottom: 8px;
}
.list-card h2 { font-size: 20px; color: var(--navy); margin-bottom: 8px; letter-spacing: -.02em; }
.list-card p { color: var(--muted); font-size: 15px; }
footer {
  padding: 28px 0 48px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 13px;
}
@media (max-width: 700px) {
  .nav { display: none; }
  .article-card { padding: 24px 18px; }
  .hero-blog { padding: 40px 0 36px; }
}