.stackattack-shell{background:linear-gradient(180deg,#f5fbff 0%,#eef4ff 100%);border:1px solid #d9e7ff;border-radius:18px;box-shadow:0 10px 30px rgba(64,92,170,.12);margin:20px 0;padding:16px}.stackattack-play-area{background:#101c3d;border-radius:16px;margin:0 auto;overflow:hidden;position:relative}.stackattack-play-area:fullscreen{border-radius:0;display:flex;flex-direction:column;height:100vh;padding:8px;width:100vw}.stackattack-topbar{align-items:center;background:rgba(8,16,38,.45);display:flex;justify-content:space-between;padding:8px 8px 0}.stackattack-topbar-stats{display:flex;gap:10px}.stackattack-topbar-stat{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.2);border-radius:12px;color:#fff;min-width:86px;padding:8px 12px}.stackattack-topbar-stat-label{display:block;font-size:11px;letter-spacing:.04em;opacity:.8;text-transform:uppercase}.stackattack-topbar-stat-value{display:block;font-size:20px;font-weight:700;line-height:1.1;margin-top:2px}.stackattack-topbar-actions{display:flex;gap:10px}@media(max-width:575px){.stackattack-topbar{align-items:stretch;flex-direction:column;gap:10px}.stackattack-topbar-stats,.stackattack-topbar-actions{justify-content:center}}.stackattack-topbar-btn{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);border-radius:12px;color:#fff;cursor:pointer;font-size:14px;font-weight:700;padding:10px 14px}.stackattack-topbar-btn:hover,.stackattack-topbar-btn:focus{background:rgba(255,255,255,.22);outline:none}.stackattack-topbar-btn.is-active{background:rgba(106,229,157,.25)}.stackattack-stage{align-items:center;background:#101c3d;display:flex;flex:1 1 auto;justify-content:center;min-height:772px;overflow:hidden;padding:4px;position:relative}#gameCanvas{background:transparent;border-radius:12px;display:block;height:auto;max-width:100%;width:100%}.stackattack-play-area,.stackattack-stage,#gameCanvas{overscroll-behavior:contain;touch-action:none}.stackattack-overlay{align-items:center;background:rgba(10,18,41,.66);display:flex;inset:4px;justify-content:center;padding:16px;position:absolute;z-index:5}.stackattack-overlay.is-hidden{display:none}.stackattack-panel{background:rgba(255,255,255,.97);border-radius:20px;box-shadow:0 16px 50px rgba(18,30,76,.28);color:#20315f;max-width:560px;padding:26px;text-align:center;width:100%}.stackattack-panel h2,.stackattack-panel h3{color:#24356c;margin-top:0}.stackattack-panel p,.stackattack-panel li{font-size:16px;line-height:1.55}.stackattack-actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:18px}.stackattack-input{border:2px solid #cad8ff;border-radius:12px;font-size:18px;margin-top:12px;padding:10px 14px;text-align:center;width:100%}.stackattack-status{color:#7b2248;font-weight:600;margin-top:12px;min-height:24px}.stackattack-hint-text{color:#1b4e86;font-size:26px;font-weight:700;margin-top:14px;min-height:42px;opacity:0}.stackattack-hint-text.show{animation:stackattackHintFade 3s linear forwards}.stackattack-list{margin:16px auto 0;max-width:430px;padding-left:20px;text-align:left}.stackattack-note{background:#eef4ff;border-radius:12px;color:#314777;margin-top:14px;padding:12px 14px}.stackattack-hud{margin-top:16px}.stackattack-card{background:#fff;border:1px solid #d9e7ff;border-radius:16px;box-shadow:0 8px 20px rgba(64,92,170,.08);height:100%;padding:16px}.stackattack-card h4{color:#24356c;font-size:16px;margin:0 0 10px}.stackattack-stat-grid{display:grid;gap:10px;grid-template-columns:repeat(2,minmax(0,1fr))}.stackattack-stat{background:#f6f9ff;border-radius:12px;padding:10px 12px}.stackattack-stat-label{color:#5d6f99;display:block;font-size:12px;text-transform:uppercase}.stackattack-stat-value{color:#24356c;display:block;font-size:22px;font-weight:700}.stackattack-meta{color:#314777;line-height:1.7;margin:0}.stackattack-controls{color:#314777;margin-bottom:10px;padding-left:18px}.stackattack-controls li+li{margin-top:6px}#stackattackNextPieceCanvas{background:linear-gradient(180deg,#1a2d5d 0%,#16254c 100%);border-radius:12px;display:block;height:120px;margin:0 auto;width:120px}@keyframes stackattackHintFade{0%{opacity:1}100%{opacity:0}}