body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background: linear-gradient(135deg, #ffe4ec, #ffd6e7);
  color: #333;
}

.container {
  max-width: 800px;
  margin: auto;
  padding: 20px;
}

header {
  background: rgba(255,255,255,0.9);
  text-align: center;
  padding: 30px 10px;
  border-bottom: 2px solid #f8b4c6;
}

h1 {
  margin: 0;
  color: #c2185b;
}

.small {
  font-size: 0.8em;
  display: block;
}

.subtitle {
  font-size: 0.9em;
}

.card {
  background: white;
  border-radius: 16px;
  padding: 20px;
  margin: 20px 0;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.highlight {
  border: 2px solid #f48fb1;
  text-align: center;
}

.theme {
  font-size: 1.8em;
  color: #ad1457;
}

.gradient {
  background: linear-gradient(135deg, #ec407a, #d81b60);
  color: white;
}

.gradient .email {
  background: white;
  color: #d81b60;
  padding: 10px;
  border-radius: 8px;
  text-align: center;
  font-weight: bold;
}

.email-label {
  margin-top: 15px;
  font-size: 0.9em;
}

.note {
  font-size: 0.8em;
  margin-top: 10px;
}

footer {
  text-align: center;
  padding: 20px;
  background: rgba(255,255,255,0.8);
  border-top: 2px solid #f8b4c6;
  margin-top: 40px;
}