body {
    font-family: 'Arial', sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100vh;
    margin: 0;
    background: linear-gradient(135deg, #464646, #000000);
    color: #f0f0f0;
}

.container {
    text-align: center;
    padding: 20px;
}

/* ルーレット */
.roulette-container {
    position: relative;
    margin: 0 auto 20px auto;
    width: 90%;
    max-width: 400px;
    aspect-ratio: 1/1;
}

/* テキストボックス */
textarea {
    width: 90%;
    max-width: 400px;
    height: 100px;
    margin-top: 20px;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid #444;
    background-color: #2c2c2e;
    color: #f0f0f0;
    font-size: 1em;
}

/* ボタン */
button {
    margin-top: 10px;
    padding: 10px 20px;
    font-size: 1.1em;
    background-color: #4a90e2;
    border: none;
    border-radius: 10px;
    color: white;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background-color: #357ab8;
}

/* 結果表示 */
#result {
    margin-top: 20px;
    font-size: 1.5em;
    font-weight: bold;
    color: #ffd700;
}

.share-buttons {
    margin-top: 10px;
    display: none; /* 初期は非表示 */
}

.share-buttons button {
    margin: 5px;
    padding: 8px 16px;
    font-size: 1em;
    border-radius: 8px;
    border: none;
    background-color: #1DA1F2; /* Twitterブルー */
    color: #fff;
    cursor: pointer;
    transition: 0.3s;
}

.share-buttons button:hover {
    background-color: #0d95e8;
}