.game-shell{width:100%;min-height:calc(100vh - 80px);padding:24px;display:grid;place-items:start center;}.game-stage{width:min(1180px,100%);padding:22px;border:1px solid var(--line);border-radius:8px;background:var(--panel);backdrop-filter:blur(12px);}.game-header{display:flex;align-items:end;justify-content:space-between;gap:18px;padding:2px 2px 20px;}.eyebrow{margin:0 0 5px;color:var(--accent-light);font-size:0.78rem;font-weight:700;text-transform:uppercase;}h1{margin:0;font-size:2.15rem;line-height:1;font-weight:800;}.turn-pill{min-width:128px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 14px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,0.04);font-weight:700;white-space:nowrap;}.turn-dot{width:10px;height:10px;border-radius:50%;}.turn-dot--black{background:#1A1A1A;box-shadow:0 0 0 4px rgba(0,0,0,0.4);}.turn-dot--white{background:#F5F8FC;box-shadow:0 0 0 4px rgba(105,192,255,0.25);}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:22px;align-items:stretch;}.board-column{min-width:0;display:grid;place-items:center;}.board{--grid:15;width:min(100%,70vh,640px);aspect-ratio:1 / 1;position:relative;border-radius:6px;border:1px solid var(--line);background:linear-gradient(rgba(105,192,255,0.12) 1px,transparent 1px) 0 0 / calc(100% / (var(--grid) - 1)) calc(100% / (var(--grid) - 1)),linear-gradient(90deg,rgba(105,192,255,0.12) 1px,transparent 1px) 0 0 / calc(100% / (var(--grid) - 1)) calc(100% / (var(--grid) - 1)),rgba(255,255,255,0.06);padding:calc(50% / (var(--grid) - 1));box-sizing:border-box;}.board__inner{position:absolute;inset:calc(50% / (var(--grid) - 1));}.point{position:absolute;width:calc(100% / (var(--grid) - 1));height:calc(100% / (var(--grid) - 1));translate:-50% -50%;display:grid;place-items:center;background:transparent;border:0;cursor:pointer;}.stone{width:80%;height:80%;border-radius:50%;position:relative;}.stone--black{background:radial-gradient(circle at 32% 30%,#4a4a4a 0%,#1a1a1a 60%,#000 100%);box-shadow:inset 0 -3px 6px rgba(0,0,0,0.6),0 2px 6px rgba(0,0,0,0.5);}.stone--white{background:radial-gradient(circle at 32% 30%,#ffffff 0%,#e8edf3 60%,#c8cfd6 100%);border:1px solid rgba(105,192,255,0.4);box-shadow:inset 0 -3px 6px rgba(0,0,0,0.15),0 2px 6px rgba(0,0,0,0.4);}.point.is-last .stone::after{content:"";position:absolute;inset:-10%;border-radius:50%;border:2px solid var(--accent);pointer-events:none;}.point.is-win .stone{animation:winPulse 0.9s ease-in-out infinite alternate;}@keyframes winPulse{to{box-shadow:0 0 12px var(--accent-light),inset 0 -3px 6px rgba(0,0,0,0.4);}}.side-panel{display:flex;flex-direction:column;gap:14px;padding:16px;border:1px solid var(--line);border-radius:8px;background:rgba(255,255,255,0.04);}.status-block,.mode-block,.history-block{border:1px solid var(--line);border-radius:8px;background:rgba(255,255,255,0.03);padding:14px 16px;}.section-kicker{display:block;margin-bottom:8px;color:var(--muted);font-size:0.82rem;font-weight:700;}.status-message{margin:0;font-size:1.35rem;line-height:1.25;font-weight:800;}.check-message{margin:6px 0 0;color:var(--accent-light);font-size:0.9rem;font-weight:700;min-height:1.1em;}.mode-options{display:flex;flex-direction:column;gap:6px;font-size:0.92rem;}.mode-options label{cursor:pointer;}.mode-options input{accent-color:var(--accent);margin-right:6px;}.controls{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;}.control-button{min-height:42px;border:1px solid var(--line);border-radius:8px;color:var(--ink);background:rgba(255,255,255,0.06);font-weight:800;cursor:pointer;transition:background 0.14s,border-color 0.14s,transform 0.14s;}.control-button:hover,.control-button:focus-visible{background:rgba(105,192,255,0.1);border-color:var(--accent-light);transform:translateY(-1px);outline:none;}.control-button--primary{background:var(--accent);border-color:var(--accent);color:#fff;}.control-button--primary:hover{background:var(--accent-light);border-color:var(--accent-light);}.history-block{flex:1;display:flex;flex-direction:column;padding:0;}.history-head{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--line);font-weight:800;}.history-head span:last-child{color:var(--muted);font-size:0.86rem;}.move-list{margin:0;padding:8px 14px 12px 38px;max-height:240px;overflow:auto;}.move-list li{padding:6px 0;color:var(--muted);font-size:0.92rem;}.move-list li:last-child{color:var(--ink);font-weight:800;}@media (max-width:980px){.game-layout{grid-template-columns:1fr;}.controls{grid-template-columns:1fr;}}