body {
    font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
    background: #fff9f9;
    color: #333;
    margin: 0;
    padding: 0;
    text-align: center;
    background-image: url('../image/top_background.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

h1 {
    font-size: 2.5rem;
    margin-top: 60px;
    color: #ff6f91;
}

p {
    font-size: 1.2rem;
    margin: 0.5em auto 2em;
}

.button-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    width: 90%;
    max-width: 400px;
    margin: 0 auto;
}

.link-button {
    background: #fff;
    border: 2px solid #ffb6c1;
    border-radius: 16px;
    padding: 1em;
    text-decoration: none;
    color: #ff4f87;
    font-weight: bold;
    box-shadow: 0 3px 6px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.link-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.button-container {
    position: absolute;
    bottom: 60px; /* キャラの下あたりに調整 */
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 400px;
    padding: 0 1rem;
}

footer {
    position: absolute;
    bottom: 10px; /* 足元の少し上。必要に応じて調整してOK */
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.9rem;
    color: #aaa;
    background-color: rgba(255, 255, 255, 0.6); /* 背景がごちゃつかないように少し透過 */
    padding: 4px 12px;
    border-radius: 12px;
}