:root {
  --navy: #1A237E;
  --yellow: #FFD400;
  --white: #FFFFFF;
  --text: #0F172A;
  --muted: #64748B;
  --divider: #E2E8F0;
  --bg: #F8FAFC;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
}

header {
  background: var(--navy);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

header .wordmark {
  font-size: 24px;
  font-weight: 900;
  color: var(--yellow);
  letter-spacing: -0.5px;
}

header .subtitle {
  font-size: 11px;
  font-weight: 700;
  color: rgba(255,255,255,0.7);
  letter-spacing: 3px;
  text-transform: uppercase;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

h1 {
  font-size: 28px;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 8px;
}

.meta {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--divider);
}

h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
  margin: 32px 0 10px;
}

p { margin-bottom: 14px; }
p:last-child { margin-bottom: 0; }

ul, ol {
  padding-left: 22px;
  margin-bottom: 14px;
}

li { margin-bottom: 6px; }

a { color: var(--navy); font-weight: 600; }
a:hover { opacity: 0.75; }

.back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
  text-decoration: none;
  margin-bottom: 28px;
}

.back::before { content: "←"; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.card {
  background: var(--white);
  border: 1px solid var(--divider);
  border-radius: 12px;
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  transition: box-shadow 0.15s;
}

.card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.08); }

.card-icon { font-size: 28px; margin-bottom: 10px; }
.card-title { font-weight: 700; color: var(--navy); margin-bottom: 4px; }
.card-desc { font-size: 13px; color: var(--muted); }

.hero {
  background: var(--navy);
  color: var(--white);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 32px;
}

.hero h1 { color: var(--yellow); margin-bottom: 10px; }
.hero p { color: rgba(255,255,255,0.85); margin: 0; }

footer {
  text-align: center;
  padding: 32px 24px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--divider);
}

@media (max-width: 600px) {
  h1 { font-size: 22px; }
  .container { padding: 24px 16px 60px; }
}