#tosg-orphan-message {
    position: fixed;
    z-index: 2147483647;
    left: 50%;
    bottom: 24px;
    width: min(92vw, 620px);
    transform: translateX(-50%) translateY(16px);
    box-sizing: border-box;
    padding: 14px 18px;
    border: 1px solid #8f1d16;
    border-radius: 6px;
    background: #fff7f6;
    color: #58130f;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.24);
    font: 600 15px/1.45 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    opacity: 0;
    pointer-events: none;
    transition: opacity 160ms ease, transform 160ms ease;
}

#tosg-orphan-message.tosg-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.tc_seat_unit.tosg-orphan-seat {
    outline: 3px solid #b42318 !important;
    outline-offset: 2px;
    animation: tosg-orphan-pulse 700ms ease-in-out 2;
}

@keyframes tosg-orphan-pulse {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.45); }
}

@media (prefers-reduced-motion: reduce) {
    #tosg-orphan-message,
    .tc_seat_unit.tosg-orphan-seat {
        animation: none;
        transition: none;
    }
}