.board-container{display:flex;flex-direction:column;justify-content:center;align-items:center;padding:10px;background:var(--panel-bg);border-radius:12px;box-shadow:0 0 30px #00d9ff26;width:100%;max-width:600px;min-height:400px;position:relative;transition:background-color .3s}.hypercube-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr);gap:8px;width:100%}.interaction-hint{margin-top:15px;font-size:.8rem;color:var(--accent-cyan);text-transform:uppercase;letter-spacing:1px;opacity:.8;text-align:center}.cpu-thinking-hint{color:var(--accent-orange);animation:text-pulse 1s infinite alternate}@keyframes text-pulse{0%{opacity:.4}to{opacity:1}}.sector{background:#8080800d;border:1px solid var(--panel-border);padding:4px;border-radius:4px;display:flex;flex-direction:column;transition:transform .2s,background .2s,border-color .3s}.sector.mini{cursor:pointer}.sector.mini:hover{background:#8080801a;border-color:var(--accent-cyan);transform:scale(1.02)}.sector-label{font-size:.6rem;color:var(--text-color);opacity:.6;text-align:center;margin-bottom:2px;font-family:monospace;display:flex;align-items:center;justify-content:center;gap:10px}.sector.zoomed .sector-label{font-size:1.2rem;color:var(--accent-cyan);margin-bottom:15px;padding:0 10px;opacity:1}.back-btn{background:var(--btn-bg);color:var(--btn-text);border:1px solid var(--panel-border);padding:4px 12px;border-radius:20px;font-size:.8rem;cursor:pointer;transition:background .2s}.back-btn:hover{filter:brightness(1.2)}.sector-grid{display:flex;flex-direction:column;gap:2px}.sector.zoomed .sector-grid{gap:8px}.sector-row{display:flex;gap:2px;justify-content:center}.sector.zoomed .sector-row{gap:8px}.cell{width:14px;height:14px;background:#8080801a;border:1px solid var(--panel-border);border-radius:2px;cursor:default;transition:all .2s;position:relative;overflow:visible}.sector.zoomed .cell{width:60px;height:60px;border-radius:6px;border-width:2px}.cell-valid{cursor:pointer}.cell-ready{animation:cell-breathe 2.5s infinite ease-in-out}@keyframes cell-breathe{0%{opacity:.3;background:#8080801a}50%{opacity:.7;background:#80808033}to{opacity:.3;background:#8080801a}}.cell-ready:before{content:"";position:absolute;top:15%;right:15%;bottom:15%;left:15%;border:1px solid transparent;border-radius:4px;pointer-events:none;transition:border-color .3s ease;z-index:1}.board-container.player-1 .cell-ready:before{border-color:#00d9ff66;animation:reticle-pulse 2s infinite ease-in-out}.board-container.player-2 .cell-ready:before{border-color:#ff5e0066;animation:reticle-pulse 2s infinite ease-in-out}@keyframes reticle-pulse{0%{transform:scale(.85);opacity:.3}50%{transform:scale(1.05);opacity:1;border-width:2px}to{transform:scale(.85);opacity:.3}}.cell-thinking{background:#ff5e0033;border-color:var(--accent-orange);box-shadow:0 0 15px var(--accent-orange);animation:cpu-target .4s infinite alternate;z-index:5}@keyframes cpu-target{0%{transform:scale(1);opacity:.6}to{transform:scale(1.3);opacity:1}}.sector.zoomed .cell-thinking{animation:cpu-target-zoomed .4s infinite alternate}@keyframes cpu-target-zoomed{0%{transform:scale(1);opacity:.6}to{transform:scale(1.1);opacity:1;box-shadow:0 0 25px var(--accent-orange)}}.sector.zoomed .cell-valid:hover{background:#80808026;box-shadow:inset 0 0 10px #8080801a}.cell-1{background:var(--accent-cyan);box-shadow:0 0 8px var(--accent-cyan);border-color:#fff;animation:cell-spawn .3s ease-out}.cell-2{background:var(--accent-orange);box-shadow:0 0 8px var(--accent-orange);border-color:#fff;animation:cell-spawn .3s ease-out}@keyframes cell-spawn{0%{transform:scale(0);opacity:0}to{transform:scale(1);opacity:1}}.cell-win{z-index:100;border-color:#fff!important}.p1-win{animation:celebrate-p1 1.5s infinite ease-in-out}.p2-win{animation:celebrate-p2 1.5s infinite ease-in-out}@keyframes celebrate-p1{0%{transform:scale(1);box-shadow:0 0 10px var(--accent-cyan)}50%{transform:scale(1.15);box-shadow:0 0 30px var(--accent-cyan),0 0 15px #fff;filter:brightness(1.5)}to{transform:scale(1);box-shadow:0 0 10px var(--accent-cyan)}}@keyframes celebrate-p2{0%{transform:scale(1);box-shadow:0 0 10px var(--accent-orange)}50%{transform:scale(1.15);box-shadow:0 0 30px var(--accent-orange),0 0 15px #fff;filter:brightness(1.5)}to{transform:scale(1);box-shadow:0 0 10px var(--accent-orange)}}.cell-win:before{content:"";position:absolute;top:-20%;left:-20%;width:140%;height:140%;background:radial-gradient(circle,rgba(255,255,255,.9) 0%,transparent 70%);opacity:0;animation:shimmer-win 2s infinite linear;pointer-events:none;z-index:2}@keyframes shimmer-win{0%{opacity:0;transform:scale(.5)}30%{opacity:.6}to{opacity:0;transform:scale(1.5)}}.cell-last:after{content:"";display:block;width:4px;height:4px;background:#fff;margin:5px auto;border-radius:50%;opacity:.8}.sector.zoomed .cell-last:after{width:12px;height:12px;margin:24px auto}.zoom-overlay{width:100%;height:100%;display:flex;justify-content:center;align-items:center;animation:fade-in .3s cubic-bezier(.4,0,.2,1)}@keyframes fade-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(max-width:600px){.cell{width:10px;height:10px}.hypercube-grid{gap:4px}.sector.zoomed .cell{width:50px;height:50px}}:root{--bg-color: #02020a;--text-color: #e0e0e0;--panel-bg: #111111;--panel-border: #333333;--accent-cyan: #00d9ff;--accent-orange: #ff5e00;--btn-bg: #333333;--btn-text: #ffffff;--header-glow: rgba(0, 217, 255, .2);--transition-speed: .3s}body.light-mode{--bg-color: #f0f2f5;--text-color: #1a1a1a;--panel-bg: #ffffff;--panel-border: #d1d1d1;--accent-cyan: #008eb4;--accent-orange: #e65100;--btn-bg: #e0e0e0;--btn-text: #1a1a1a;--header-glow: rgba(0, 0, 0, .05)}body{margin:0;font-family:Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);overflow-x:hidden;transition:background-color var(--transition-speed) ease,color var(--transition-speed) ease}h1,h2,h3{margin:0;font-weight:300;letter-spacing:2px;text-transform:uppercase}button,select{cursor:pointer;font-family:inherit}select{background:var(--btn-bg);color:var(--btn-text);border:1px solid var(--panel-border);padding:4px 8px;border-radius:4px;font-size:.8rem;outline:none}select:focus{border-color:var(--accent-cyan)}.app-layout{display:flex;flex-direction:column;align-items:center;min-height:100vh;padding:20px}.header{margin-bottom:20px;text-align:center}.header h1{background:linear-gradient(90deg,var(--accent-cyan),var(--accent-orange));-webkit-background-clip:text;-webkit-text-fill-color:transparent;font-size:2.5rem;font-weight:800;text-shadow:0 0 20px var(--header-glow)}.controls-bar{display:flex;gap:15px;margin-bottom:20px;background:var(--panel-bg);padding:10px 20px;border-radius:50px;border:1px solid var(--panel-border);flex-wrap:wrap;justify-content:center;transition:background-color var(--transition-speed),border-color var(--transition-speed);box-shadow:0 4px 15px #0000004d}.control-group{display:flex;align-items:center;gap:8px;font-size:.85rem}.btn{background:var(--btn-bg);color:var(--btn-text);border:none;padding:8px 16px;border-radius:4px;transition:background .2s,transform .1s,color var(--transition-speed);font-weight:600;font-size:.8rem;text-transform:uppercase}.btn:hover{filter:brightness(1.1)}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--accent-cyan);color:#fff}.game-area{display:flex;flex-direction:column;align-items:center;gap:20px}.status-panel{display:flex;justify-content:space-between;width:100%;max-width:500px;background:var(--panel-bg);padding:15px;border-radius:8px;border-left:4px solid var(--panel-border);transition:background-color var(--transition-speed),border-color var(--transition-speed)}.status-panel.p1{border-left-color:var(--accent-cyan)}.status-panel.p2{border-left-color:var(--accent-orange)}.turn-indicator{font-size:1.2rem;font-weight:700}.variant-info{margin-top:10px;max-width:600px;text-align:center;font-size:.9rem;color:var(--text-color);opacity:.6;line-height:1.4;background:var(--panel-bg);padding:10px;border-radius:4px}