/* ===== メッセージページ専用スタイル ===== */

.message-section {
    padding: 60px 0;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    min-height: calc(100vh - 200px);
}

.message-container {
    max-width: 850px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 25px rgba(0,0,0,0.1);
    overflow: hidden;
}

/* メッセージヘッダー */
.message-header {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    padding: 40px 30px;
    text-align: center;
}

.message-title {
    font-size: 26px;
    font-weight: 700;
    color: white;
    margin: 0;
    letter-spacing: 1px;
}

/* メッセージ本文 */
.message-body {
    padding: 50px 60px;
}

.message-opening {
    font-size: 16px;
    color: #333;
    margin-bottom: 35px;
    line-height: 2.0;
    text-align: left;
}

.message-paragraph {
    font-size: 16px;
    color: #333;
    margin-bottom: 28px;
    line-height: 2.0;
    text-indent: 1em;
}

.message-paragraph strong {
    color: #1e3a8a;
    font-weight: 700;
    font-size: 17px;
    background: linear-gradient(transparent 60%, #fde68a 60%);
    padding: 2px 4px;
}

.message-closing {
    font-size: 16px;
    color: #333;
    margin: 35px 0 40px 0;
    text-align: right;
    padding-right: 20px;
    font-weight: 500;
}

.message-date-signature {
    margin-top: 45px;
    text-align: right;
    padding-right: 10px;
}

.message-date {
    font-size: 15px;
    color: #555;
    margin-bottom: 15px;
    font-weight: 500;
}

.message-signature {
    font-size: 16px;
    color: #1e3a8a;
    font-weight: 700;
    line-height: 1.8;
}

/* アクションボタン */
.message-actions {
    padding: 35px 60px 50px 60px;
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-back {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
    color: white;
}

.btn-back:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(100, 116, 139, 0.4);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .message-section {
        padding: 40px 0;
    }

    .message-header {
        padding: 30px 20px;
    }

    .message-title {
        font-size: 22px;
    }

    .message-body {
        padding: 35px 25px;
    }

    .message-opening,
    .message-paragraph {
        font-size: 15px;
        line-height: 1.9;
        margin-bottom: 24px;
    }

    .message-paragraph {
        text-indent: 0;
    }

    .message-closing {
        font-size: 15px;
        margin: 30px 0 35px 0;
        padding-right: 10px;
    }

    .message-date-signature {
        margin-top: 35px;
        padding-right: 5px;
    }

    .message-date {
        font-size: 14px;
        margin-bottom: 12px;
    }

    .message-signature {
        font-size: 15px;
    }

    .message-actions {
        padding: 25px 20px 35px 20px;
        flex-direction: column;
        gap: 15px;
    }

    .message-actions .btn {
        width: 100%;
    }
}