:root {
  --sky: #0a1f40;
  --sky-deep: #071a3a;
  --card: #ffffff;
  --ink: #1b2236;
  --muted: #5a6478;
  --accent: #ffd648;
  --link: #1f5fbf;
  --rule: #e3e7ef;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: linear-gradient(180deg, var(--sky-deep) 0%, var(--sky) 320px, #eef1f6 320px);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

header {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 16px 28px;
  display: flex;
  align-items: center;
  gap: 18px;
  color: #fff;
}

header img {
  width: 84px;
  height: 84px;
  border-radius: 19px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
  flex: none;
}

header a { color: inherit; text-decoration: none; }

header h1 {
  margin: 0;
  font-size: 34px;
  line-height: 1.1;
  color: var(--accent);
  letter-spacing: 0.3px;
}

header p { margin: 4px 0 0; color: #c9d4ea; }

nav {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 16px 14px;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

nav a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  opacity: 0.85;
}

nav a[aria-current="page"] { opacity: 1; border-bottom: 2px solid var(--accent); }

main {
  max-width: 760px;
  margin: 0 auto 40px;
  padding: 28px 24px 32px;
  background: var(--card);
  border-radius: 16px;
  box-shadow: 0 8px 28px rgba(10, 31, 64, 0.12);
}

@media (max-width: 800px) {
  main { margin: 0 16px 32px; padding: 22px 18px 26px; }
}

h2 { font-size: 22px; margin: 28px 0 8px; }
h2:first-child { margin-top: 0; }
h3 { font-size: 18px; margin: 20px 0 4px; }

p, ul { margin: 0 0 12px; }
ul { padding-left: 22px; }
li { margin-bottom: 6px; }

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

.meta { color: var(--muted); font-size: 15px; }

.summary {
  background: #f4f7fc;
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 12px 16px;
  margin: 0 0 20px;
}

.summary ul { margin: 0; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 8px 0 4px;
}

.cards a {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--rule);
  border-radius: 12px;
  text-decoration: none;
  color: var(--ink);
}

.cards a strong { display: block; font-size: 18px; color: var(--link); }

footer {
  max-width: 760px;
  margin: 0 auto 40px;
  padding: 0 16px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}