.membership-upgrade-modal {
    position: fixed;
    inset: 0;
    z-index: 12000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(4, 4, 13, 0.72);
    backdrop-filter: blur(4px);
}
.membership-upgrade-modal[hidden] { display: none !important; }
.membership-upgrade-sheet {
    position: relative;
    width: min(420px, 100%);
    padding: 24px;
    border: 1px solid var(--rs-border-strong, rgba(255,255,255,.16));
    border-radius: var(--rs-radius-dialog, 20px);
    background: var(--rs-bg-raised, #171722);
    color: var(--rs-text-primary, #fff);
    box-shadow: 0 24px 64px rgba(0,0,0,.35);
}
.membership-upgrade-close {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 44px;
    height: 44px;
    border: 0;
    background: transparent;
    color: var(--rs-text-secondary, #a5a5b0);
    font-size: 26px;
    cursor: pointer;
}
.membership-upgrade-kicker {
    width: fit-content;
    margin-bottom: 12px;
    padding: 5px 10px;
    border-radius: 999px;
    background: rgba(10,132,255,.18);
    color: #5ac8fa;
    font-size: 12px;
    font-weight: 750;
    letter-spacing: .04em;
}
.membership-upgrade-sheet h2 {
    margin: 0;
    padding-right: 42px;
    font-size: 22px;
    line-height: 1.25;
}
.membership-upgrade-message,
.membership-upgrade-note {
    margin: 10px 0 0;
    color: var(--rs-text-secondary, #b3b3bd);
    font-size: 14px;
    line-height: 1.6;
}
.membership-upgrade-context {
    margin-top: 18px;
    border: 1px solid var(--rs-border-subtle, rgba(255,255,255,.1));
    border-radius: 14px;
    overflow: hidden;
}
.membership-upgrade-context > div {
    min-height: 46px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 0 14px;
    border-bottom: 1px solid var(--rs-border-subtle, rgba(255,255,255,.08));
    color: var(--rs-text-secondary, #aaa);
    font-size: 13px;
}
.membership-upgrade-context > div:last-child { border-bottom: 0; }
.membership-upgrade-context strong {
    color: var(--rs-text-primary, #fff);
    font-variant-numeric: tabular-nums;
}
.membership-upgrade-entitlement {
    display: flex;
    gap: 9px;
    align-items: flex-start;
    margin-top: 16px;
    color: var(--rs-text-primary, #fff);
    font-size: 14px;
    line-height: 1.45;
}
.membership-upgrade-check {
    display: inline-grid;
    place-items: center;
    flex: 0 0 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(48,209,88,.16);
    color: #30d158;
    font-weight: 800;
}
.membership-upgrade-actions {
    display: grid;
    gap: 8px;
    margin-top: 22px;
}
.membership-upgrade-actions button { min-height: 46px; justify-content: center; }
body.membership-upgrade-open { overflow: hidden; }
@media (max-width: 600px) {
    .membership-upgrade-modal {
        align-items: flex-end;
        padding: 0;
    }
    .membership-upgrade-sheet {
        width: 100%;
        border-radius: 22px 22px 0 0;
        padding: 24px 18px calc(18px + env(safe-area-inset-bottom));
    }
}