@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;700&display=swap');

body {
    font-family: 'Noto Sans JP', sans-serif;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

.bounce {
    animation: bounce 2s infinite;
}

.menu-open {
    max-height: 300px;
    transition: max-height 0.3s ease-in-out;
}

.menu-closed {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-in-out;
}