@import url('https://fonts.googleapis.com/css2?family=Mochiy+Pop+One&display=swap');

body {
  font-family: 'Mochiy Pop One', sans-serif;
  text-align: center;
  background: linear-gradient(to bottom, #f8fff8, #fffaf0);
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.intro-box {
  background: #fffbe7;
  border: 2px solid #ffcc00;
  border-radius: 14px;
  padding: 25px;
  margin-bottom: 30px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  animation: floatUp 1s ease-out;
}

@keyframes floatUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.intro-box h2 {
  font-size: 1.7em;
  color: #e65100;
  margin-bottom: 15px;
}

.intro-box p {
  font-size: 1.15em;
  line-height: 1.6;
}

.vs-image {
  width: 100%;
  border-radius: 10px;
  margin-bottom: 20px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.happy-aoi {
  margin-top: 20px;
  width: 70%;
}

button {
  padding: 12px 24px;
  font-size: 18px;
  background-color: #ff69b4;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}
button:hover {
  background-color: #e056a1;
}

.hidden {
  display: none;
}

#linkToKatsumaru a {
  font-size: 1.1em;
  font-weight: bold;
  text-decoration: none;
  color: #d9534f;
  background: #fff1f1;
  padding: 10px 16px;
  border-radius: 8px;
  display: inline-block;
  margin-top: 20px;
  transition: all 0.2s ease;
}

#linkToKatsumaru a:hover {
  background: #ffe3e3;
  color: #c9302c;
}

#linkToAoi a {
  font-size: 1.1em;
  font-weight: bold;
  text-decoration: none;
  color: #1976d2;
  background: #e3f2fd;
  padding: 10px 16px;
  border-radius: 8px;
  display: inline-block;
  margin-top: 20px;
  transition: all 0.2s ease;
}

#linkToAoi a:hover {
  background: #bbdefb;
  color: #0d47a1;
}