.popup-overlay{position:fixed;inset:0;background-color:rgba(0,0,0,.6);z-index:9999;display:flex;justify-content:center;align-items:center}.popup-content{background:#fff;padding:20px;border-radius:10px;width:90%;max-width:400px;max-height:80vh;overflow-y:auto;box-shadow:0 0 10px rgba(0,0,0,.3);position:relative}.close-btn{position:absolute;top:10px;right:14px;background:transparent;border:none;font-size:1.2rem;cursor:pointer}.popup-content h3{text-align:center;margin-bottom:15px;font-size:18px}.size-chart-images{display:flex;flex-direction:column;gap:12px}.size-chart-item{text-align:center}.size-chart-item img{max-width:100%;height:auto;border:1px solid #ddd;border-radius:6px}@media (max-width:480px){.popup-content{max-width:90%;padding:15px}.popup-content h3{font-size:16px}.close-btn{font-size:1rem}}