body {
  margin: 0;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  background: #f6f4fb;
  color: #222;
}

header {
  background: linear-gradient(135deg, #7a3cff, #ff66b3);
  color: white;
  text-align: center;
  padding: 40px 20px;
}

header h1 {
  margin: 0 0 10px;
  font-size: 36px;
}

header p {
  margin: 0;
  font-size: 18px;
}

nav {
  display: flex;
  justify-content: center;
  gap: 20px;
  background: white;
  padding: 15px;
  border-bottom: 1px solid #ddd;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  color: #7a3cff;
  font-weight: bold;
}

main {
  max-width: 900px;
  margin: 30px auto;
  padding: 0 20px;
}

.card {
  background: white;
  border-radius: 16px;
  padding: 25px;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

footer {
  text-align: center;
  padding: 20px;
  background: #eee;
  margin-top: 40px;
}