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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #f5f5f5;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

header {
  background: #fff;
  color: #000;
  padding: 1.25rem 0 1rem;
  border-bottom: 4px solid #0055FF;
}

.banner {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 0.5rem;
}

.tagline {
  margin-top: 0.4rem;
  color: #444;
  font-size: 1.05rem;
  text-align: center;
}

.hero {
  padding: 2.5rem 0 1rem;
}

.hero p {
  font-size: 1.15rem;
  color: #222;
}

.products {
  padding: 1.5rem 0 2rem;
}

.products h2,
.about h2 {
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
  color: #0055FF;
  border-bottom: 1px solid #ddd;
  padding-bottom: 0.4rem;
}

.cards {
  display: grid;
  gap: 1.25rem;
}

.card {
  background: #fff;
  border: 1px solid #e0e0e0;
  border-left: 4px solid #0055FF;
  border-radius: 4px;
  padding: 1.25rem 1.4rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.card h3 {
  font-size: 1.1rem;
  color: #000;
  margin-bottom: 0.5rem;
}

.card p {
  color: #333;
  font-size: 0.98rem;
}

.note {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: #666;
  font-style: italic;
}

.about {
  padding: 0.5rem 0 2.5rem;
}

.about p {
  margin-bottom: 0.9rem;
  color: #333;
}

footer {
  background: #0055FF;
  color: #fff;
  padding: 1.5rem 0;
  font-size: 0.85rem;
  text-align: center;
}

footer p {
  margin-bottom: 0.3rem;
}

.contact {
  color: rgba(255,255,255,0.85);
}

@media (max-width: 600px) {
  .container {
    padding: 0 1.1rem;
  }
}