body {
  margin: 0;
  font-family: 'Noto Sans JP', sans-serif;
  line-height: 1.6;
  background-color: #ffffff;
  color: #333349;
}

header {
  background-color: #393d4f;
  color: #d8d8eb;
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}h1 {
  color: white;
}

nav a {
  color: white;
  text-decoration: none;
  margin-left: 15px;
}

.hero {
  text-align: center;
  padding: 80px 20px;
  background-color: #d3ddee;
}

section {
  padding: 50px 20px;
  max-width: 1000px;
  margin: auto;
}

.card-container {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.card {
  background: white;
  padding: 20px;
  width: 33%;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

footer {
  text-align: center;
  padding: 20px;
  background-color: #8fb4e8;
  color: white;
}
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #ffffff;
}
button:hover {
  background-color: #656977;
}

.card-container {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.card {
  width: calc(50% - 10px);
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(31, 20, 183, 0.273);
  box-sizing: border-box;
}

iframe {
  width: 100%;
  height: 500px;
  border: none;
}