/* ===== 共通スタイル (Common Styles) ===== */

body {
    background-color: #000;
    color: #fff;
    font-family: 'Noto Serif JP', serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

h1 {
    font-size: 1.2rem;
    opacity: 0.8;
    margin-bottom: 20px;
    text-align: center;
}

.controls {
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

/* メイン操作ボタン */
button {
    padding: 10px 20px;
    border-radius: 99px;
    border: 1px solid #fff;
    background: #fff;
    color: #000;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.2s;
    font-family: 'Noto Serif JP', serif;
    text-decoration: none;
    display: inline-block;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.5);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* サイトナビゲーション用エリア */
.site-nav {
    margin-top: 30px;
    display: flex;
    gap: 15px;
    justify-content: center;
    font-size: 0.9rem;
}

/* ナビゲーションリンクボタン */
.nav-link {
    color: #ccc;
    text-decoration: none;
    border-bottom: 1px solid #666;
    padding-bottom: 2px;
    transition: color 0.2s, border-color 0.2s;
}

.nav-link:hover {
    color: #d35400;
    border-color: #d35400;
}