.market-card__thumb { position: relative; }
.market-card__countdown {
    position: absolute;
    bottom: 8px;
    left: 8px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 5px 10px;
    border-radius: 8px;
    line-height: 1;
    z-index: 2;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}
.market-card__countdown.is-urgent {
    background: #FF6B00;
    animation: pulse 1.5s ease-in-out infinite;
}
.market-card__countdown.is-ended {
    background: #888;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}