body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  margin: 0;
  background: #f4f6f8;
  color: #222;
  text-align: center;
}

/* HEADER */
header {
  background: #1e3a5f;
  color: white;
  padding: 16px 10px;
}

header h1 {
  margin: 0;
  font-size: 1.6rem;
}

nav {
  margin-top: 8px;
}

nav a {
  color: #ddd;
  margin: 0 10px;
  text-decoration: none;
  font-size: 14px;
}

nav a:hover {
  color: white;
}

/* MAIN */
main {
  max-width: 760px;
  margin: 20px auto;
  padding: 20px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.05);
}

/* HERO ANSWER */
.answer {
  font-size: 2rem;
  font-weight: bold;
  margin: 20px 0;
}

/* CARDS */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.card {
  background: #f2f7fa;
  padding: 12px;
  border-radius: 8px;
}

/* ADS */
.ad-top, .ad-mid, .ad-bottom {
  margin: 20px auto;
  padding: 12px;
  background: #eaeaea;
  max-width: 728px;
}

/* FOOTER */
footer {
  background: #1e3a5f;
  color: white;
  padding: 20px;
  margin-top: 40px;
}

footer nav a {
  color: #ccc;
  margin: 0 8px;
  font-size: 13px;
}

.footer-small {
  margin-top: 10px;
  font-size: 12px;
  color: #aaa;
}

.definition {
  text-align: left;
  margin-top: 30px;
  line-height: 1.6;
  color: #444;
}

.definition h2 {
  margin-top: 20px;
  color: #1e3a5f;
}