.private-s3-download__button,
.private-s3-download-modal .private-s3-download-modal__submit {
    box-sizing: border-box;
    appearance: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 24px;
    border: 1px solid #000;
    border-radius: 0;
    background: #000;
    color: #fff;
    font: inherit;
    font-weight: 700;
    line-height: 1.5;
    cursor: pointer;
}
/* テーマ共通のbutton疑似要素（左右のマスク装飾）を、この機能だけ無効にします。 */
.private-s3-download__button::before,
.private-s3-download__button::after,
.private-s3-download-modal button::before,
.private-s3-download-modal button::after { content: none; display: none; }
.private-s3-download__button:hover,
.private-s3-download-modal .private-s3-download-modal__submit:hover { border-color: #222; background: #222; }
.private-s3-download-modal {
    box-sizing: border-box;
    position: fixed;
    inset: 0;
    width: min(440px, calc(100% - 32px));
    max-width: none;
    max-height: calc(100% - 32px);
    /* 記事末尾のmargin:0より中央配置を優先します。モーダル本体だけが対象です。 */
    margin: auto !important;
    padding: 36px 28px 28px;
    border: 0;
    border-radius: 12px;
    background: #fff;
    color: #242424;
    box-shadow: 0 16px 64px #0004;
    font-family: inherit;
    font-size: 16px;
    line-height: 1.6;
    text-align: left;
    overflow: auto;
}
.private-s3-download-modal:not([open]) { display: none; }
.private-s3-download-modal::backdrop { background: rgb(0 0 0 / 55%); }
.private-s3-download-modal .private-s3-download-modal__close {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 0;
    border-radius: 4px;
    background: transparent;
    color: #555;
    font: inherit;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
}
.private-s3-download-modal .private-s3-download-modal__title {
    width: auto;
    margin: 0 16px 12px 0;
    padding: 0;
    border: 0;
    background: none;
    color: inherit;
    font-size: 22px;
    font-weight: 700;
    line-height: 1.5;
}
.private-s3-download-modal .private-s3-download-modal__description { margin: 0 0 24px; font-size: 14px; line-height: 1.7; }
.private-s3-download-modal .private-s3-download-modal__form { margin: 0; }
.private-s3-download-modal .private-s3-download-modal__label { display: block; margin: 0 0 8px; font-weight: 700; }
.private-s3-download-modal .private-s3-download-modal__input {
    box-sizing: border-box;
    display: block;
    width: 100%;
    height: 48px;
    padding: 10px 12px;
    border: 1px solid #999;
    border-radius: 6px;
    background: #fff;
    color: #242424;
    font: inherit;
    font-size: 16px;
}
.private-s3-download-modal .private-s3-download-modal__input[aria-invalid="true"] { border-color: #bc0c16; }
.private-s3-download-modal .private-s3-download-modal__error { margin: 10px 0 0; color: #bc0c16; font-size: 14px; line-height: 1.6; }
.private-s3-download-modal .private-s3-download-modal__error[hidden] { display: none; }
.private-s3-download-modal .private-s3-download-modal__submit { width: 100%; margin: 24px 0 0; }
.private-s3-download-modal .private-s3-download-modal__submit:disabled { opacity: .65; cursor: wait; }
.private-s3-download__button:focus-visible,
.private-s3-download-modal button:focus-visible,
.private-s3-download-modal input:focus-visible { outline: 3px solid #2872c6; outline-offset: 3px; }
@media (max-width: 480px) {
    .private-s3-download-modal { padding: 36px 20px 24px; }
    .private-s3-download-modal .private-s3-download-modal__title { font-size: 20px; }
}