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

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

header {
  position: sticky;
  top: 0;
  background: #333;
  color: #fff;
  padding: 10px 20px;
  z-index: 1000;
}

header nav a {
  color: #fff;
  margin-right: 20px;
  text-decoration: none;
}

header nav a:hover {
  text-decoration: underline;
}

.top-image {
  width: 100%;
  height: auto;
  display: block;
}

section {
  padding: 40px 20px;
}

#about {
  background: #f9f9f9;
}

#links {
  background: #efefef;
}

footer {
  background: #333;
  color: #fff;
  text-align: center;
  padding: 20px;
}

.container {
  max-width: 960px;
  margin: 0 auto;
}

.link-list {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap; /* スマホ対応：折り返し可 */
  margin-top: 20px;
}

.link-list li {
  display: flex;
  align-items: center;
}

.link-list li a {
  display: flex;
  align-items: center;
  font-size: 1rem;
  text-decoration: none;
  color: #333;
  transition: opacity 0.2s ease;
  padding: 10px 15px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #fff;
}

.link-list li a:hover {
  opacity: 0.8;
  background: #f0f0f0;
}

.icon {
  width: 50px;
  height: 50px;
}