/* 基本スタイル */
body {
  margin: 0;
  font-family: "Inter", "Noto Sans JP", sans-serif;
  background-color: #FDFBF7;
  color: #4A4A4A;
  line-height: 1.6;
  padding: 0 1rem;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #ddd;
}

.logo {
  font-size: 1.5rem;
  color: #6B8E23;
}

nav a {
  margin-left: 1rem;
  text-decoration: none;
  color: #4A4A4A;
}

.hero {
  text-align: center;
  padding: 4rem 1rem 2rem;
}

.catch {
  font-size: 2rem;
  color: #6B8E23;
}

.about, .products, .contact {
  display: flex;
  flex-direction: column;
  margin: 3rem 0;
  align-items: center;
}

h3 {
  color: #6B8E23;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.tech-stack {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.tech-stack li {
  background-color: #EFEFEF;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  font-size: 0.9rem;
}

.product-list {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
}

.product-card {
  background-color: #ffffff;
  padding: 1rem;
  border: 1px solid #ddd;
  border-radius: 12px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.product-card h4 {
  margin-top: 0;
  color: #4A4A4A;
}

.product-card a {
  color: #4A4A4A;
}

.contact ul {
  list-style: none;
  padding-left: 0;
}

.contact a {
  color: #4A4A4A;
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 2rem 0;
  border-top: 1px solid #ddd;
  font-size: 0.9rem;
  color: #888;
}