@charset "UTF-8";.sum-game{min-height:100vh;display:flex;justify-content:center;align-items:center;background:transparent;color:#e5f9ff}.game-card{width:420px;padding:32px;border-radius:22px;background:rgba(255,255,255,.05);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.15);box-shadow:0 0 30px #6366f140,inset 0 0 20px #ffffff0d;text-align:center}.game-title{font-size:22px;font-weight:700;margin-bottom:22px;color:#a5b4fc;text-shadow:0 0 10px rgba(99,102,241,.6)}.math-board{background:linear-gradient(135deg,#1e1b4b,#312e81);border-radius:18px;padding:30px;margin-bottom:25px;box-shadow:0 0 25px #6366f166}.number{text-align:right;width:75%}.math-card{width:120px;margin:auto;padding:18px;border-radius:14px;background:#f8fafc;color:#020617;font-size:28px;font-weight:800;box-shadow:0 10px 20px #0000004d,0 0 15px #6366f166;position:relative}.operator{position:absolute;top:40px}.line{height:3px;background:#020617;margin:8px 0}.question{color:#4f46e5}.answers{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.answer-btn{background:linear-gradient(135deg,#4f46e5,#6366f1);color:#fff;border:none;padding:15px;border-radius:14px;font-size:18px;font-weight:600;cursor:pointer;transition:all .25s ease;box-shadow:0 0 15px #6366f166}.answer-btn:hover{transform:translateY(-2px) scale(1.03);box-shadow:0 0 25px #6366f1cc}.answer-btn:active{transform:scale(.97)}.status{margin-top:18px;font-weight:600;color:#c7d2fe}.popup-overlay{position:fixed;inset:0;background:rgba(0,0,0,.75);display:flex;align-items:center;justify-content:center;z-index:9999}.popup-box{width:320px;padding:30px;border-radius:22px;text-align:center;background:#020617;color:#fff;animation:popupIn .3s ease}.popup-win{border:2px solid #22c55e;box-shadow:0 0 30px #22c55eb3}.popup-win h2{color:#22c55e}.popup-lose{border:2px solid #ef4444;box-shadow:0 0 30px #ef4444b3}.popup-lose h2{color:#ef4444}.popup-text{margin:14px 0 22px;color:#cbd5f5}.popup-btn{background:linear-gradient(135deg,#4f46e5,#6366f1);border:none;color:#fff;padding:12px 20px;border-radius:14px;font-weight:600;cursor:pointer;transition:.2s}.popup-btn:hover{transform:scale(1.05);box-shadow:0 0 20px #6366f1b3}@keyframes popupIn{0%{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}