html {
    scroll-behavior: smooth;
}

.apply h2 {
    font-family: serif;
    z-index: 2;
    font-size: 1.6rem;
}

.apply {
    margin: 0px 20px;
    padding: 50px 0px;
    text-align: center;
}

.form_label {
    display: block;
    font-family: serif;
    margin-top: 30px;
}

.form_input {
    height: 40px;
    border: 1px solid #cccccc;
    width: 100%;
    max-width: 500px;
}

.required {
    color: white;
    background-color: red;
    padding: 1px 5px;
    font-size: .7rem;
    font-weight: bold;
}

.check {
    list-style-type: none;
    display: flex;
    justify-content: space-around;
    margin-top: 15px;
}

.button {
    border-radius: 5px;
    padding: 3px 48px;
    letter-spacing: .1rem;
    background-color: #333;
    color: #fff;
    font-family: serif;
}

textarea {
    width: 100%;
    height: 300px;
    border: 1px solid #cccccc;
    resize: none;
    max-width: 500px;
}

/* 追加 */
.invalid-feedback.invalid {
    display: block;
}