:root {
  --yellow: #FFD41D;
  --orange: #FFA240;
  --red-dark: #D73535;
  --red-light: #FF4646;
}

* {
  box-sizing: border-box;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  margin: 0;
  background: #f9fafb;
  color: #222;
}

.hero {
  background: linear-gradient(135deg, var(--yellow), var(--orange));
  padding: 3rem 1.5rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.7rem;
  margin-bottom: 0.6rem;
}

.hero p {
  font-size: 1.1rem;
  max-width: 850px;
  margin: auto;
}

.content {
  max-width: 1200px;
  margin: auto;
  padding: 3rem 1.5rem;
}

.section {
  margin-bottom: 4rem;
}

.section h2 {
  font-size: 1.8rem;
  margin-bottom: 0.4rem;
}

.note {
  color: #555;
  margin-bottom: 1.4rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.4rem;
}

.card {
  background: white;
  padding: 1.3rem;
  border-radius: 14px;
  box-shadow: 0 8px 22px rgba(0,0,0,0.08);
  font-weight: 600;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  border-top: 4px solid var(--yellow);
}

.card span {
  display: block;
  margin-top: 0.35rem;
  font-weight: 500;
  color: var(--orange);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 14px 30px rgba(0,0,0,0.15);
}

.card.highlight {
  border-top: 4px solid var(--red-light);
  background: linear-gradient(180deg, #fff, #fff4f4);
}

.card.danger {
  border-top: 4px solid var(--red-dark);
  background: linear-gradient(180deg, #fff, #ffeaea);
}

.footnote {
  margin-top: 1.2rem;
  font-size: 0.9rem;
  color: #666;
}