.modal {
    display: none; /* 初期非表示 */
    position: fixed;
    z-index: 1000;
    left: 0; top: 0;
    width: 100%; height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: #fff;
    margin: 10% auto;
    padding: 20px;
    width: 500px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    position: relative;
}

.close {
    position: absolute;
    top: 10px; right: 15px;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
}

.modal-content label {
    display: block;
    margin-top: 10px;
    font-weight: bold;
}

.modal-content input {
    width: 100%;
    padding: 6px 10px;
    margin-top: 4px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

.modal-buttons {
    margin-top: 15px;
    text-align: right;
}

.modal-buttons button {
    padding: 6px 12px;
    margin-left: 10px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.modal-buttons button[type="submit"] {
    background-color: #007BFF;
    color: #fff;
}

.modal-buttons button[type="button"] {
    background-color: #ccc;
}