.supporter-introduction-banner {
    width: 100%;
    margin: 16px auto 20px;
    box-sizing: border-box;
}

.supporter-introduction-preview-label {
    margin-bottom: 8px;
    padding: 8px 12px;
    border: 2px solid #d97706;
    border-radius: 6px;
    background: #fffbeb;
    color: #92400e;
    font-weight: 700;
    text-align: center;
}

.supporter-introduction-banner-items {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.supporter-introduction-banner-link {
    display: block;
    flex: 1 1 0;
    min-width: 0;
    max-width: none;
    aspect-ratio: 3 / 1;
    overflow: hidden;
    border-radius: 6px;
    background: transparent;
    line-height: 0;
}

/* 市松模様は設定者本人が確認するプレビューだけに表示する。 */
.supporter-introduction-banner.is-preview .supporter-introduction-banner-link {
    background-color: #f8fafc;
    background-image: repeating-conic-gradient(#e2e8f0 0 25%, #fff 0 50%);
    background-size: 16px 16px;
}

.supporter-introduction-banner-image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 6px;
}

@media (max-width: 700px) {
    .supporter-introduction-banner {
        margin-top: 10px;
    }

    .supporter-introduction-banner-items {
        flex-direction: column;
        justify-content: center;
        gap: 8px;
    }

    .supporter-introduction-banner-link {
        width: 100%;
        flex: 0 0 auto;
    }

    .supporter-introduction-desktop-copy {
        display: none;
    }
}