body {
  font-family: 'Noto Sans JP', sans-serif;
  background: linear-gradient(to bottom right, #ffffff, #e6f7ff);
  padding: 20px;
  margin: 0;
  text-align: center;
}

p {
  font-size: 3vw;
}
h1, h2 {
  font-size: 7vw;
  color: #007bff;
  margin: 30px 0;
}

form {
  background: #ffffff;
  padding: 30px;
  border-radius: 20px;
  box-shadow: 0 8px 16px rgba(0,0,0,0.2);
  display: inline-block;
  width: 95%;
  max-width: 500px;
}

button {
  display: block;
  width: 100%;
  margin: 20px 0;
  padding: 20px;
  background: #007bff;
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 6vw;
  font-weight: bold;
  transition: background 0.3s, transform 0.2s;
}
button:hover {
  background: #0056b3;
  transform: scale(1.08);
}

a {
  display: inline-block;
  margin-top: 30px;
  padding: 15px 30px;
  background: #ff7f50;
  color: white;
  text-decoration: none;
  border-radius: 12px;
  font-size: 5.5vw;
  font-weight: bold;
}
a:hover {
  background: #ff4500;
}

@media (min-width: 768px) {
  h1, h2 { font-size: 48px; }
  button { font-size: 28px; }
  a { font-size: 24px; }
}