:root{--kps-shell-blue:#2563eb;--kps-shell-dark:#0f172a;--kps-shell-line:#dbeafe}
#kps-game-shell{position:fixed;z-index:999990;left:10px;right:10px;top:10px;display:flex;justify-content:space-between;align-items:center;gap:8px;pointer-events:none;font-family:Arial,sans-serif}
#kps-game-shell .kps-shell-group{display:flex;align-items:center;gap:7px;pointer-events:auto;background:rgba(255,255,255,.94);border:1px solid var(--kps-shell-line);box-shadow:0 8px 26px rgba(15,23,42,.12);border-radius:999px;padding:6px 8px;backdrop-filter:blur(8px)}
#kps-game-shell a,#kps-game-shell button{border:0;text-decoration:none;cursor:pointer;border-radius:999px;padding:8px 11px;font-weight:800;font-size:12px;line-height:1;background:#eff6ff;color:#1d4ed8}
#kps-game-shell button{background:#fff1f2;color:#be123c}
#kps-game-shell .kps-student-chip{display:flex;align-items:center;gap:7px;color:var(--kps-shell-dark);font-size:12px;font-weight:700;max-width:48vw}
#kps-game-shell .kps-student-chip img{width:30px;height:30px;border-radius:50%;object-fit:cover;background:#e2e8f0}
#kps-game-shell .kps-student-chip span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#kps-shell-loader{position:fixed;z-index:999999;inset:0;background:linear-gradient(135deg,#eff6ff,#fdf4ff);display:flex;align-items:center;justify-content:center;font-family:Arial,sans-serif;color:#1e3a8a}
#kps-shell-loader .box{background:white;border-radius:24px;padding:22px 28px;box-shadow:0 18px 50px rgba(37,99,235,.16);text-align:center;font-weight:800}
#kps-shell-loader .dot{display:inline-block;animation:kpsPulse 1s infinite alternate}
@keyframes kpsPulse{to{transform:scale(1.35);opacity:.5}}
@media(max-width:600px){#kps-game-shell{top:6px;left:6px;right:6px}#kps-game-shell .kps-shell-group{padding:4px 5px}#kps-game-shell a,#kps-game-shell button{padding:7px 9px;font-size:11px}.kps-shell-hide-mobile{display:none!important}}