.gw-extra-options {
    margin: 15px 0;
    padding: 16px 20px;
    background: rgba(0,0,0,0.25);
    border: 1px solid rgba(212,168,83,0.15);
    border-radius: 12px;
}
.gw-extra-options__title {
    font-size: 14px;
    font-weight: 600;
    color: #d4a853;
    margin-bottom: 12px;
    font-family: 'Nunito Sans', sans-serif;
}
.gw-extra-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    cursor: pointer;
    user-select: none;
}
.gw-extra-option.is-hidden { display: none; }
.gw-extra-option__check {
    width: 18px;
    height: 18px;
    min-width: 18px;
    border-radius: 50%;
    border: 1.5px solid #555;
    background: transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    cursor: pointer;
}
.gw-extra-option.is-active .gw-extra-option__check {
    border-color: #d4a853;
    background: #d4a853;
}
.gw-extra-option.is-active .gw-extra-option__check::after {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #1a1a2e;
}
.gw-extra-option__label {
    flex: 1;
    font-size: 13px;
    color: #ccc;
    font-family: 'Nunito Sans', sans-serif;
}
.gw-extra-option.is-active .gw-extra-option__label { color: #fff; }
.gw-extra-option__cost {
    font-size: 13px;
    color: #999;
    white-space: nowrap;
    font-family: 'Nunito Sans', sans-serif;
}
.gw-extra-option.is-active .gw-extra-option__cost { color: #d4a853; }
.gw-extra-option__tip-wrap {
    display: none;
    padding: 6px 0 2px 28px;
}
.gw-extra-option.is-active .gw-extra-option__tip-wrap { display: flex; }
.gw-extra-option__tip-wrap input {
    width: 120px;
    padding: 6px 10px;
    background: rgba(255,255,255,0.07);
    border: 1px solid #555;
    border-radius: 6px;
    color: #fff;
    font-size: 13px;
    font-family: 'Nunito Sans', sans-serif;
}
.gw-extra-option__tip-wrap input:focus {
    border-color: #d4a853;
    outline: none;
}
.gw-extra-option__tip-currency {
    font-size: 13px;
    color: #999;
    margin-left: 6px;
    line-height: 32px;
}
.gw-extra-options__total {
    display: none;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 13px;
    color: #d4a853;
    font-family: 'Nunito Sans', sans-serif;
}
.gw-extra-options__total.is-visible { display: block; }

@media (max-width: 768px) {
    .gw-extra-options { padding: 12px 14px; }
    .gw-extra-option__label { font-size: 12px; }
    .gw-extra-option__cost { font-size: 12px; }
}
@media (max-width: 360px) {
    .gw-extra-option__tip-wrap { padding-left: 0; }
    .gw-extra-option__tip-wrap input { width: 100%; }
}