:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --ink: #142033;
  --muted: #4f5f77;
  --accent: #0b63ce;
  --accent-soft: #dceafc;
  --border: #d9e2ef;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top right, #e7f0ff 0%, var(--bg) 35%, #f2f6ff 100%);
  line-height: 1.6;
}

a {
  color: var(--accent);
}

a:hover {
  text-decoration-thickness: 2px;
}

header {
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(4px);
}

.wrap {
  width: min(980px, 92vw);
  margin: 0 auto;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  gap: 1rem;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.4px;
  color: var(--ink);
  text-decoration: none;
}

.brand small {
  display: block;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--muted);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  font-weight: 600;
}

main {
  padding: 2.2rem 0 2.6rem;
}

.hero {
  background: linear-gradient(145deg, #0d2b52, #0b63ce 60%, #3988e6);
  color: #fff;
  border-radius: 18px;
  padding: 2rem;
  box-shadow: 0 16px 30px rgba(10, 27, 52, 0.18);
}

.hero p {
  color: #e7effb;
  max-width: 70ch;
}

.grid {
  margin-top: 1.5rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem 1.15rem;
}

.card h2,
.card h3 {
  margin-top: 0;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.1rem 1.3rem;
  margin-bottom: 1rem;
}

footer {
  border-top: 1px solid var(--border);
  background: #f0f5fc;
  padding: 1.2rem 0 2rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin: 0.5rem 0;
  padding: 0;
  list-style: none;
}

.footer-links a {
  text-decoration: none;
}

small,
.meta {
  color: var(--muted);
}

code {
  background: var(--accent-soft);
  padding: 0.05rem 0.25rem;
  border-radius: 4px;
}

@media (max-width: 680px) {
  .hero {
    padding: 1.4rem;
  }
}