.biocodeusa-ack-open,
.biocodeusa-ack-submit {
    background: linear-gradient(135deg, #0057b8 0%, #14b8d4 100%);
    color: #fff;
    border: 0;
    padding: 14px 20px;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 700;
    box-shadow: 0 10px 22px rgba(0, 87, 184, .22);
    line-height: 1.3;
}

.biocodeusa-ack-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99999;
}

.biocodeusa-ack-modal.is-open {
    display: block;
}

.biocodeusa-ack-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(2, 25, 54, .68);
}

.biocodeusa-ack-dialog {
    position: relative;
    background: #fff;
    width: min(980px, 92vw);
    max-height: 90vh;
    overflow: auto;
    margin: 4vh auto;
    border-radius: 18px;
    padding: 24px;
    box-shadow: 0 24px 60px rgba(0, 57, 115, .28);
    border-top: 6px solid #14b8d4;
}

.biocodeusa-ack-close {
    position: sticky;
    top: 0;
    float: right;
    border: 0;
    background: transparent;
    font-size: 32px;
    line-height: 1;
    cursor: pointer;
}

.biocodeusa-ack-content h2,
.biocodeusa-ack-content h3,
.biocodeusa-ack-content h4 {
    margin-top: 0;
}

.biocodeusa-ack-version {
    color: #4b6f8f;
    font-size: 13px;
}

.biocodeusa-ack-document {
    border: 1px solid #c9e8f3;
    padding: 18px;
    border-radius: 14px;
    background: linear-gradient(180deg, #f4fbff 0%, #ffffff 100%);
    max-height: 420px;
    overflow: auto;
    margin-bottom: 24px;
}

.biocodeusa-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.biocodeusa-ack-form p {
    margin: 0 0 16px;
}

.biocodeusa-ack-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
}

.biocodeusa-ack-form input[type="text"],
.biocodeusa-ack-form input[type="email"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #b9ddec;
    border-radius: 6px;
}

.biocodeusa-checkbox label {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    font-weight: 500;
}

.biocodeusa-ack-response {
    margin-top: 12px;
    font-weight: 600;
}

.biocodeusa-ack-response.success { color: #087f5b; }
.biocodeusa-ack-response.error { color: #b3261e; }

.biocodeusa-ack-content h2 { color: #063a73; }
.biocodeusa-ack-content h3 { color: #0057b8; }
.biocodeusa-ack-content h4 { color: #0077a8; }
.biocodeusa-ack-form input:focus { outline: none; border-color: #14b8d4; box-shadow: 0 0 0 3px rgba(20, 184, 212, .16); }

body.biocodeusa-ack-modal-open {
    overflow: hidden;
}

@media (max-width: 768px) {
    .biocodeusa-grid {
        grid-template-columns: 1fr;
    }
    .biocodeusa-ack-dialog {
        width: 96vw;
        padding: 16px;
    }
}