:root{--font-geist-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-geist-mono:"SFMono-Regular", Consolas, "Liberation Mono", monospace;--font-noto-sans-sc:-apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;--font-noto-serif-sc:"Songti SC";--ink:#17201d;--muted:#6f7d77;--line:#d9ddd8;--soft-line:#e8ebe6;--paper:#f4f5f1;--panel:#fbfcf8;--jade:#0d715b;--jade-deep:#084d41;--jade-light:#dfece5;--gold:#b6853e;--board:#d6aa6c;--board-dark:#704924;--shadow:0 20px 50px #1f2b2617}*{box-sizing:border-box}html,body{touch-action:manipulation;min-height:100%}html{scroll-behavior:smooth}body{color:var(--ink);font-family:var(--font-noto-sans-sc), "PingFang SC", "Microsoft YaHei", sans-serif;-moz-text-size-adjust:100%;text-size-adjust:100%;background:radial-gradient(circle at 14% 0,#0d715b0e,#0000 31rem),linear-gradient(135deg,#f8f9f5 0%,#eff1ec 100%);margin:0}button{color:inherit;font:inherit}button:focus-visible{outline:2px solid var(--jade);outline-offset:3px}.app-shell{min-height:100vh}.topbar{z-index:10;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#fbfcf8e6;border-bottom:1px solid #7a88813d;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;min-height:78px;padding:12px clamp(20px,3vw,52px);display:grid;position:relative}.brand-lockup,.brand-line,.topbar-center,.local-badge,.mode-card,.setting-row,.record-title,.players-bar,.player,.game-controls,.control-group,.turn-indicator,.brain-identity,.subheading,.candidate,.candidate-main>div,.thought-head,.chart-legend,.engine-selector button{align-items:center;display:flex}.brand-lockup{gap:13px}.brand-mark{object-fit:cover;border-radius:8px;flex:none;width:43px;height:43px;display:block;transform:rotate(45deg)}.brand-line{gap:10px}.brand-line h1{font-family:var(--font-noto-serif-sc), "Songti SC", serif;letter-spacing:.08em;background:linear-gradient(100deg,#17201d 0% 34%,#084d41 41%,#0d715b 45%,#2ec4a0 50%,#0d715b 55%,#084d41 59%,#17201d 66% 100%) 100% 0/250% 100%;color:#0000;-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:0;font-size:20px;font-weight:700;animation:3.2s ease-in-out infinite brand-shine}@keyframes brand-shine{0%,40%{background-position:100% 0}to{background-position:-130% 0}}@media (prefers-reduced-motion:reduce){.brand-line h1{color:var(--ink);-webkit-text-fill-color:var(--ink);animation:none}}.brand-line span{color:#8b9892;font:600 9px/1 var(--font-geist-mono), monospace;letter-spacing:.12em;border-left:1px solid #cfd5d0;padding-left:10px}.brand-lockup p{color:#8b958f;letter-spacing:.22em;margin:4px 0 0;font-size:10px}.topbar-center{border:1px solid var(--line);color:#74817b;background:#fff9;border-radius:99px;gap:12px;min-height:36px;padding:0 18px;font-size:11px}.topbar-center strong{color:#2b3833;font-weight:650}.engine-dot{background:var(--jade);border-radius:50%;width:7px;height:7px;box-shadow:0 0 0 4px #0d715b1a}.engine-dot.pulse,.thought-pulse.active{animation:1.25s ease-in-out infinite pulse}.divider{background:#d8deda;width:1px;height:14px}.local-badge{color:#6d7a75;letter-spacing:.08em;gap:8px;font-size:11px}.topbar-right{justify-self:end;align-items:center;gap:10px;display:flex}.menu-toggle{cursor:pointer;background:#fff;border:1px solid #d5ddd7;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:40px;height:40px;display:none}.menu-toggle i{background:#33413b;width:16px;height:1.5px;transition:all .2s;display:block}.menu-toggle.open i:first-child{transform:translateY(6.5px)rotate(45deg)}.menu-toggle.open i:nth-child(2){opacity:0}.menu-toggle.open i:nth-child(3){transform:translateY(-6.5px)rotate(-45deg)}.drawer-backdrop,.drawer-head,.drawer-play-engine{display:none}.signal-bars{align-items:flex-end;gap:2px;height:13px;display:inline-flex}.signal-bars i{background:var(--jade);border-radius:2px;width:2px}.signal-bars i:first-child{opacity:.55;height:5px}.signal-bars i:nth-child(2){opacity:.75;height:8px}.signal-bars i:nth-child(3){height:12px}.workspace{grid-template-columns:252px minmax(560px,1fr) 390px;grid-template-areas:"modes game brain";width:min(1780px,100%);min-height:calc(100vh - 78px);margin:0 auto;display:grid}.play-stack{display:contents}.board-sticky{flex-direction:column;align-items:stretch;gap:0;width:min(68vh,700px,100%);max-width:100%;margin-inline:auto;display:flex}.panel{background:#fbfcf8c2}.mode-panel{border-right:1px solid var(--line);flex-direction:column;grid-area:modes;gap:25px;padding:30px 22px 24px;display:flex}.brain-panel{border-left:1px solid var(--line);grid-area:brain;padding:28px 26px 24px}.section-label{color:#74817b;letter-spacing:.24em;text-transform:uppercase;justify-content:space-between;align-items:center;margin-bottom:14px;font-size:10px;font-weight:700;display:flex}.section-label b{color:#acb6b1;font:500 9px var(--font-geist-mono), monospace}.section-label:after{content:"";background:var(--soft-line);flex:1;order:1;height:1px;margin:0 9px}.section-label b{order:2}.mode-list{gap:7px;display:grid}.mode-card{text-align:left;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:4px;gap:10px;width:100%;padding:10px;transition:all .2s;position:relative}.mode-card:hover{background:#f1f4ef}.mode-card.active{box-shadow:inset 3px 0 0 var(--jade);background:linear-gradient(90deg,#e9f0ea,#f3f6f1);border-color:#0d715b33}.mode-mark{color:#68746f;width:33px;height:33px;font-family:var(--font-noto-serif-sc), serif;background:#f9faf7;border:1px solid #d8ded9;flex:none;place-items:center;font-size:14px;display:grid;transform:rotate(45deg)}.mode-mark i{font-style:normal;transform:rotate(-45deg)}.mode-card.active .mode-mark{border-color:var(--jade);background:var(--jade);color:#fff}.mode-copy{flex:1;gap:3px;display:grid}.mode-copy strong{font-size:13px;font-weight:650}.mode-copy small{color:#8a9690;font-size:9px}.mode-arrow{color:#a2aca7;font-size:20px;font-weight:300}.mode-card.active .mode-arrow{color:var(--jade)}.settings-section{border-top:1px solid var(--soft-line);padding-top:22px}.settings-section>.section-label{margin-bottom:28px}.mode-panel>section>.section-label,.drawer-play-engine>.section-label{margin-bottom:16px}.setting-row{background:0 0;border:0;justify-content:space-between;gap:24px;width:100%;min-height:40px;font-size:11px}.setting-row>span:not(.segmented){color:#33413b;flex:none}.setting-row>.segmented{flex:0 auto}.setting-row>.segmented.fill,.setting-row-fill>.segmented{flex:auto;width:auto;min-width:0}.setting-row-fill>.segmented{width:100%}button.setting-row{cursor:pointer;padding:0}.segmented{background:#eff2ee;border:1px solid #dce1dc;min-width:0;max-width:100%;padding:2px;display:flex}.segmented button{color:#83908a;white-space:nowrap;cursor:pointer;background:0 0;border:0;flex:none;justify-content:center;align-items:center;gap:5px;height:28px;padding:0 10px;font-size:10px;display:flex}.segmented.fill button{flex:1 1 0;min-width:0;padding:0 8px}.segmented button.selected{color:var(--ink);background:#fff;box-shadow:0 1px 4px #1a282217}.segmented button:disabled{cursor:not-allowed;opacity:.66}.switch{background:#cfd5d1;border-radius:12px;width:30px;height:16px;padding:2px;transition:all .2s}.switch i{background:#fff;border-radius:50%;width:12px;height:12px;transition:all .2s;display:block;box-shadow:0 1px 3px #0003}.switch.on{background:var(--jade)}.switch.on i{transform:translate(14px)}.study-picker-note{color:var(--jade-deep);font:500 9px/1.4 var(--font-geist-mono), monospace;margin:2px 0 10px;font-style:normal;display:block}.settings-section>.study-picker-note{text-align:right}.play-engine-block{z-index:6;position:relative}.brain-head.desktop-play-engine,.drawer-play-engine{z-index:6;position:relative;overflow:visible}.engine-rule-tip{z-index:12;color:#7a6428;font:500 10px/1.45 var(--font-noto-serif-sc), serif;background:#fffaecf7;border:1px solid #c49a2a52;align-items:flex-start;gap:8px;margin:0;padding:8px 10px;display:flex;position:absolute;top:calc(100% + 6px);left:0;right:0;box-shadow:0 8px 20px #46370a1f}.engine-rule-tip p{flex:1;margin:0}.engine-rule-tip button{color:#9a8240;cursor:pointer;background:0 0;border:0;flex:none;width:22px;height:22px;margin:-2px -4px 0 0;font-size:16px;line-height:1}.engine-rule-tip button:hover{color:#5c4a1c}.mini-stone{border-radius:50%;width:10px;height:10px;display:inline-block}.mini-stone.black{background:linear-gradient(145deg,#46504c,#0a0c0b)}.mini-stone.white{background:linear-gradient(145deg,#fff,#d6d8d4);border:1px solid #c8ceca}.record-card{border:1px solid #0d715b33;border-left:3px solid var(--jade);background:linear-gradient(135deg,#eaf1ebf5,#ffffffe6);padding:16px 14px;box-shadow:0 10px 24px #0d715b1a}.record-card-sidebar{margin-bottom:4px}.record-card-mobile{width:min(760px,100%);margin-bottom:12px;display:none}.record-title{letter-spacing:.12em;justify-content:space-between;align-items:center;margin-bottom:12px;font-size:11px;font-weight:700;display:flex}.record-title span{color:var(--jade-deep)}.record-title em,.subheading em{color:#7f8d86;font:600 8px var(--font-geist-mono), monospace;letter-spacing:.1em;font-style:normal}.record-grid{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.record-grid div{text-align:center;background:#ffffff9e;border:1px solid #0d715b1a;border-radius:2px;gap:4px;padding:8px 4px;display:grid}.record-grid div.highlight{background:#eaf1ebe6;border-color:#0d715b47}.record-grid strong{font:600 clamp(22px, 2.4vw, 28px) var(--font-geist-mono), monospace;color:#1f2a25;line-height:1}.record-grid div.highlight strong{color:var(--jade-deep)}.record-grid strong small{font-size:11px}.record-grid span{color:#6d7a74;font-size:9px;font-weight:600}.record-actions{grid-template-columns:1fr 1fr;gap:6px;margin-top:10px;display:grid}.record-reset,.record-history{color:#6a7871;letter-spacing:.08em;cursor:pointer;background:#ffffffb8;border:1px solid #0d715b2e;width:100%;min-height:30px;margin-top:0;font-size:9px;font-weight:650}.record-reset:hover{color:#a43b30;background:#fff7f5f2;border-color:#c2403259}.record-history:hover{color:var(--jade-deep);background:#eaf1ebf2;border-color:#0d715b59}.game-stage{flex-direction:column;grid-area:game;align-items:center;min-width:0;padding:24px clamp(26px,3.4vw,64px) 22px;display:flex}.players-bar{justify-content:center;gap:clamp(16px,3vw,52px);width:min(760px,100%);margin-bottom:17px}.player{opacity:.64;border-bottom:2px solid #0000;gap:12px;min-width:195px;padding:8px 11px;transition:all .2s}.player.active{opacity:1;border-color:var(--jade);background:linear-gradient(90deg,#0d715b0a,#0000)}.white-player{text-align:right;justify-content:flex-end}.white-player.active{background:linear-gradient(-90deg,#0d715b0a,#0000)}.player-stone{border-radius:50%;flex:none;width:37px;height:37px;box-shadow:0 5px 10px #1f27242e}.player-stone.black{background:radial-gradient(circle at 34% 28%,#58615d,#151917 48%,#050606 78%)}.player-stone.white{background:radial-gradient(circle at 32% 27%,#fff,#f4f4ef 50%,#c8cbc7 100%);border:1px solid #c9ceca}.player div{flex:1;gap:2px;display:grid}.player div small{color:#929e98;font:600 8px var(--font-geist-mono), monospace;letter-spacing:.09em}.player div strong{font-family:var(--font-noto-serif-sc), serif;font-size:13px}.player-used{color:#7d8a84;font:500 11px/1.2 var(--font-geist-mono), monospace;letter-spacing:.04em}.player.active .player-used{color:var(--jade-deep)}.player>b{color:#7d8a84;font:500 14px var(--font-geist-mono), monospace}.player>b small{font:500 8px inherit}.versus{color:#88948e;justify-items:center;gap:2px;min-width:52px;display:grid}.versus span,.versus small{letter-spacing:.08em;font-size:8px}.versus i{color:var(--gold);font:italic 500 15px Georgia,serif}.challenge-banner{color:#79613d;background:#f7f3e9;border:1px solid #b6853e40;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;width:min(720px,100%);margin-bottom:12px;padding:9px 12px;display:grid}.challenge-banner span{font:600 11px var(--font-noto-serif-sc), serif;white-space:nowrap}.challenge-banner .challenge-no{color:#c44d1a;font-weight:800}.challenge-banner .challenge-note{text-overflow:ellipsis;white-space:nowrap;text-align:center;color:#8a7350;min-width:0;font-size:11px;font-style:normal;font-weight:500;overflow:hidden}.challenge-banner .challenge-nav{flex-shrink:0;gap:6px;display:flex}.challenge-banner .challenge-nav button{color:#865f29;height:28px;font:650 10px var(--font-noto-serif-sc), serif;cursor:pointer;background:#fffdf8;border:1px solid #b6853e59;padding:0 10px}.challenge-banner .challenge-nav button:hover:not(:disabled){border-color:var(--jade);color:var(--jade)}.challenge-banner .challenge-nav button:disabled{cursor:not-allowed;opacity:.38}.challenge-section{gap:10px;display:grid}.challenge-picker{gap:8px;margin-top:4px;display:grid}.challenge-picker>span{justify-content:space-between;align-items:baseline;font-size:10px;font-weight:650;display:flex}.challenge-picker>span small{color:#8a968f;font-size:8px;font-weight:500}.challenge-picker-error{color:#b44a3d;font-size:9px;font-style:normal}.challenge-list{gap:5px;max-height:220px;display:grid;overflow:auto}.challenge-list button{color:#65736c;text-align:left;cursor:pointer;background:#fff;border:1px solid #d8ded9;align-items:stretch;gap:0;min-height:56px;padding:0;display:flex;overflow:hidden}.challenge-list button .board-index{border-right:1px solid #e0e7e1}.challenge-list button .board-thumb{border:0;border-right:1px solid #d5ddd6;flex:0 0 48px;align-self:center;width:48px;min-width:48px;height:48px;min-height:48px;margin:0}.challenge-list .challenge-main{flex:1;align-content:center;gap:8px;min-width:0;padding:8px 9px;display:grid}.challenge-list button strong{font:600 13px/1.3 var(--font-noto-serif-sc), serif;color:#333}.challenge-list button small{color:#666;font:500 9px/1.4 var(--font-geist-mono), monospace}.challenge-list button.selected{border-color:var(--jade);box-shadow:0 2px 2px #ccc}.challenge-list button:disabled{opacity:.55;cursor:wait}.board-frame{aspect-ratio:1;background:linear-gradient(145deg,#bf8f50,#8f622f);flex-shrink:0;width:100%;padding:8px;position:relative;box-shadow:0 0 0 1px #795027,0 0 0 6px #b48143,0 0 0 7px #704821,0 24px 55px #4530193b}.board-frame:before,.board-frame:after{content:"";pointer-events:none;z-index:0;position:absolute}.board-frame:before{border:1px solid #ffeec76b;inset:3px}.board-frame:after{background:linear-gradient(135deg,#ffffff29,#0000 25% 75%,#4d2a0c1f);inset:8px}.board-rim{z-index:1;background:repeating-linear-gradient(2deg,#53311105 0 1px,#0000 1px 8px),linear-gradient(120deg,#dcb579,#d1a266);width:100%;height:100%;padding:20px 18px 18px 26px;position:relative;overflow:hidden}.board-rim:before{content:"";pointer-events:none;background:radial-gradient(circle at 50% 35%,#ffecbe33,#0000 55%);position:absolute;inset:0}.board-frame.slim-border{padding:0;box-shadow:0 0 0 1px #795027,0 10px 28px #4530192e}.board-frame.slim-border:before,.board-frame.slim-border:after{display:none}.board-frame.slim-border .board-rim{padding:2px}.board-frame.slim-border .column-labels,.board-frame.slim-border .row-labels{display:none}.column-labels{z-index:2;pointer-events:none;grid-template-columns:repeat(19,minmax(0,1fr));display:grid;position:absolute;top:4px;left:26px;right:18px}.column-labels:has(span:nth-child(15):last-child){grid-template-columns:repeat(15,1fr)}.column-labels:has(span:nth-child(13):last-child){grid-template-columns:repeat(13,1fr)}.row-labels{z-index:2;pointer-events:none;grid-template-rows:repeat(19,minmax(0,1fr));display:grid;position:absolute;top:20px;bottom:18px;left:5px}.row-labels:has(span:nth-child(15):last-child){grid-template-rows:repeat(15,1fr)}.row-labels:has(span:nth-child(13):last-child){grid-template-rows:repeat(13,1fr)}.column-labels span,.row-labels span{color:#341c0ae0;font:700 12px/1 var(--font-geist-mono), monospace;letter-spacing:.02em;text-shadow:0 1px #ffecc88c;place-items:center;display:grid}.gomoku-board{z-index:2;touch-action:manipulation;cursor:pointer;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;grid-auto-rows:minmax(0,1fr);grid-auto-columns:minmax(0,1fr);width:100%;height:100%;display:grid;position:relative}.win-line{z-index:6;pointer-events:none;width:100%;height:100%;position:absolute;inset:0;overflow:visible}.win-line line{stroke-linecap:round;stroke-dasharray:var(--win-len);stroke-dashoffset:var(--win-len);animation:.75s ease-out forwards win-line-draw,2.2s ease-in-out .75s infinite win-line-fade}.win-line .win-glow{stroke:#ffffff59;stroke-width:.22px}.win-line .win-core{stroke:#fff;stroke-width:.1px}@keyframes win-line-draw{to{stroke-dashoffset:0}}@keyframes win-line-fade{0%,to{opacity:1}50%{opacity:.2}}.board-cell{z-index:1;pointer-events:none;background:0 0;border:0;width:100%;min-width:0;height:100%;min-height:0;margin:0;padding:0;position:relative}.board-cell:before,.board-cell:after{content:"";z-index:-1;pointer-events:none;background:#452a12a8;position:absolute}.board-cell:before{width:100%;height:1px;top:50%;left:0}.board-cell:after{width:1px;height:100%;top:0;left:50%}.board-cell.edge-left:before{width:50%;left:50%}.board-cell.edge-right:before{width:50%}.board-cell.edge-top:after{height:50%;top:50%}.board-cell.edge-bottom:after{height:50%}.board-cell.locked{cursor:default}.star-point{z-index:2;pointer-events:none;background:#5a3618;border-radius:50%;width:5px;height:5px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.stone{aspect-ratio:1;z-index:4;pointer-events:none;border-radius:50%;place-items:center;width:82%;animation:.12s cubic-bezier(.2,.8,.2,1) both stone-in;display:grid;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.stone.black{background:radial-gradient(circle at 33% 27%,#56605b,#181c1a 45%,#030403 78%);box-shadow:inset -2px -3px 5px #00000073,0 3px 4px #3622105c}.stone.white{background:radial-gradient(circle at 32% 25%,#fff,#f7f5eb 48%,#c5c3b6 100%);border:1px solid #81776452;box-shadow:inset -2px -3px 5px #796e5933,0 3px 4px #36221047}.move-number{z-index:2;font:650 clamp(6px, .8vw, 10px) var(--font-geist-mono), monospace;line-height:1;position:relative}.stone.black .move-number{color:#ffffffe6;text-shadow:0 1px 1px #000}.stone.white .move-number{color:#303833}.stone .move-number.is-last{color:#e23b2e;text-shadow:0 0 1px #ffffffb3;font-size:calc(clamp(6px,.8vw,10px) + 1px)}.gomoku-board.size-19 .move-number{font:650 clamp(5px, .55vw, 8px) var(--font-geist-mono), monospace}.gomoku-board.size-19 .stone .move-number.is-last{font-size:calc(clamp(5px,.55vw,8px) + 1px)}.last-mark{z-index:3;opacity:0;pointer-events:none;width:42%;height:42%;animation:10ms linear forwards last-mark-in;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.last-mark:before,.last-mark:after{content:"";background:#e23b2e;border-radius:1px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 0 0 1px #ffffff80}.last-mark:before{width:100%;height:28%}.last-mark:after{width:28%;height:100%}.stone.black .last-mark:before,.stone.black .last-mark:after{box-shadow:none}@keyframes last-mark-in{0%{opacity:0}to{opacity:1}}.arena-start-overlay{z-index:7;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#1a2420bd;place-items:center;padding:20px;display:grid;position:absolute;inset:8px}.arena-start-card{text-align:center;background:#fafaf5f5;border:1px solid #ecd3a37a;width:min(480px,100%);padding:22px;box-shadow:0 20px 50px #0000003d}.arena-start-card>small{color:var(--gold);font:700 8px var(--font-geist-mono), monospace;letter-spacing:.2em}.arena-start-card h2{font:600 22px var(--font-noto-serif-sc), serif;margin:7px 0 4px}.arena-start-card>p{color:#77847e;margin:0 0 17px;font-size:9px}.arena-engine-pickers{text-align:left;grid-template-columns:1fr 1fr;gap:9px;display:grid}.arena-side{background:#f4f5f0;border:1px solid #dde2dd;gap:7px;padding:10px;display:grid}.arena-side>span{align-items:center;gap:6px;font-size:9px;font-weight:650;display:flex}.arena-side>div{gap:4px;display:grid}.arena-side button{color:#67746e;cursor:pointer;background:#fff;border:1px solid #d9dfda;min-height:29px;font-size:8px}.arena-side button.active{border-color:var(--jade);color:var(--jade-deep);box-shadow:inset 2px 0 var(--jade);background:#e7f0e9}.arena-side button.classic.active{color:#445a6b;background:#eef3f6;border-color:#6a8498;box-shadow:inset 2px 0 #6a8498}.arena-side button.rapfi.active{border-color:var(--gold);color:#865f29;box-shadow:inset 2px 0 var(--gold);background:#f7f0e4}.arena-side-levels{grid-template-columns:repeat(2,minmax(0,1fr));gap:4px;display:grid}.arena-side-levels button{min-height:24px;padding:0 4px;font-size:8px}.arena-side-levels button.selected{border-color:var(--jade);color:var(--jade-deep);background:#e7f0e9;font-weight:650}.arena-side-note{color:#8a968f;text-align:center;font-size:7px;font-style:normal}.arena-start-button{background:var(--jade-deep);color:#fff;cursor:pointer;border:0;width:100%;min-height:38px;margin-top:12px;font-size:10px}.arena-start-button:disabled{cursor:wait;opacity:.55}.arena-difficulty-pickers{gap:10px;display:grid}.arena-diff-side{gap:6px;display:grid}.arena-diff-side>span{align-items:center;gap:6px;font-size:9px;font-weight:650;display:flex}.difficulty-grid.compact .difficulty{min-height:42px;padding:6px 8px}.hint-ring{aspect-ratio:1;z-index:4;border:2px solid #c24032d6;border-radius:50%;width:56%;animation:1.1s ease-in-out infinite hint;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.intent-ring{aspect-ratio:1;z-index:4;pointer-events:none;border-style:dashed;border-width:2px;border-radius:50%;width:62%;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.intent-ring.black{background:#12161414;border-color:#161c1a8c}.intent-ring.white{background:#ffffff29;border-color:#ffffffc7;box-shadow:0 0 0 1px #28241c47}.board-cell:not(.locked):not(.occupied):hover:after{aspect-ratio:1;z-index:3;background:#121c1824;border-radius:50%;width:74%;height:auto;top:50%;left:50%;transform:translate(-50%,-50%)}.result-bar{z-index:8;color:#fff;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#131b18f0;border:1px solid #ffffff1f;align-items:center;gap:12px;padding:12px 14px;animation:.25s both slide-up;display:flex;position:absolute;bottom:10px;left:10px;right:10px;box-shadow:0 10px 28px #00000047}.result-bar-copy{flex:1;min-width:0}.result-bar-copy small{color:#bac5bf;font:600 7px var(--font-geist-mono), monospace;letter-spacing:.2em}.result-bar-copy strong{font:500 clamp(16px, 2.4vw, 22px) var(--font-noto-serif-sc), serif;margin-top:2px;display:block}.result-bar-copy p{color:#bdc6c1;margin:2px 0 0;font-size:9px}.result-bar-actions{flex-shrink:0;align-items:center;gap:6px;display:flex}.result-bar-actions button{color:#fff;cursor:pointer;background:0 0;border:1px solid #ffffff47;min-height:34px;padding:0 12px;font-size:10px}.result-bar-actions button.ghost{color:#d5ddd8;border-color:#ffffff29}.result-bar-actions button:last-child{color:#e6c78d;background:#e6c78d1f;border-color:#e6c78d8c}.result-reopen{z-index:8;color:#f4f0e8;cursor:pointer;background:#131b18e6;border:1px solid #e6c78d6b;padding:8px 14px;font-size:10px;animation:.2s both fade-in;position:absolute;bottom:12px;left:50%;transform:translate(-50%);box-shadow:0 8px 20px #00000038}.result-seal.compact{flex-shrink:0;width:42px;height:42px;margin:0;font-size:20px}.result-seal{color:#e6c78d;width:62px;height:62px;font:500 30px var(--font-noto-serif-sc), serif;border:1px solid #e0bd7eb8;place-items:center;margin-bottom:12px;display:grid;transform:rotate(45deg)}.result-seal span{transform:rotate(-45deg)}@keyframes slide-up{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.game-controls{justify-content:space-between;gap:7px;width:100%;margin-top:23px;position:relative;overflow:visible}.control-group{align-items:center;gap:5px;display:flex}.board-transfer-wrap{flex:none;align-items:center;gap:5px;display:flex;position:relative}.board-transfer-wrap>button{padding-inline:10px}.icon-btn{justify-content:center;width:36px;min-width:36px;padding-inline:0!important}.icon-btn .control-icon{margin-right:0}.icon-btn.favorited{color:#b47828;border-color:#b4782873}.icon-btn.favorited .control-icon{color:#c4882a}.think-progress{--think-ms:3s;z-index:6;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#f5faf7f7;border:1px solid #0d715b59;justify-content:center;align-items:center;gap:8px;width:auto;height:36px;padding:0 12px;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 8px 18px #0d715b24}.think-progress.idle{opacity:0;visibility:hidden;pointer-events:none}.think-progress.active,.think-progress.done{opacity:1;visibility:visible}.think-progress.done{opacity:.85}.think-progress-track{background:#ffffffeb;border:1px solid #0d715b2e;flex:none;width:112px;height:10px;position:relative;overflow:hidden}.think-progress-track>i{transform-origin:0;background:linear-gradient(90deg,#1b8a6c,#0d715b 50%,#0a5a49);width:100%;height:100%;display:block;transform:scaleX(0)}.think-progress.active .think-progress-track>i{animation:think-bar-grow var(--think-ms) linear forwards}.think-progress.done .think-progress-track>i{animation:none;transform:scaleX(1)}.think-pct{width:38px;height:14px;color:var(--jade-deep);font:700 12px / 14px var(--font-geist-mono), monospace;text-align:center;flex:none;overflow:hidden}.think-pct>i{animation:think-pct-roll var(--think-ms) steps(99, end) forwards;display:block}.think-pct b{height:14px;font-weight:700;display:block}@keyframes think-bar-grow{0%{transform:scaleX(0)}to{transform:scaleX(.99)}}@keyframes think-pct-roll{0%{transform:translateY(0)}to{transform:translateY(-1386px)}}.turn-indicator.compact{max-width:72px;overflow:hidden}.turn-indicator.compact span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.game-controls button{color:#64716b;cursor:pointer;background:#ffffff8a;border:1px solid #d8ded9;height:34px;padding:0 13px;font-size:10px}.game-controls button:hover:not(:disabled){border-color:var(--jade);color:var(--jade)}.game-controls button:disabled{cursor:not-allowed;opacity:.38}.control-icon{margin-right:6px;font-size:15px}.turn-indicator{color:#68756f;gap:8px;font-size:10px}.turn-indicator .mini-stone{box-shadow:0 1px 3px #00000040}.game-controls .new-game,.game-controls .primary-control{border-color:var(--jade-deep);background:var(--jade-deep);color:#fff}.game-controls .new-game span,.game-controls .primary-control span{margin-right:8px}.brain-panel section{border-bottom:1px solid var(--soft-line);margin-bottom:20px;padding-bottom:20px}.brain-identity{gap:12px}.brain-orb{width:58px;height:58px;color:var(--jade-deep);background:radial-gradient(circle,#eef5ef 0 38%,#0000 39%),linear-gradient(45deg,#0000 48%,#0d715b2e 49% 51%,#0000 52%);border:1px solid #0d715b52;flex:none;place-items:center;display:grid;position:relative;transform:rotate(45deg)}.brain-orb:before,.brain-orb:after{content:"";border:1px solid #0d715b2e;position:absolute;inset:7px}.brain-orb:after{border-radius:50%;inset:15px}.brain-orb span{font:600 10px var(--font-noto-serif-sc), serif;transform:rotate(-45deg)}.brain-orb i{background:var(--gold);border-radius:50%;width:3px;height:3px;position:absolute}.brain-orb i:first-child{top:4px;left:4px}.brain-orb i:nth-child(2){top:4px;right:4px}.brain-orb i:nth-child(3){bottom:4px;right:4px}.brain-orb.thinking{animation:3s linear infinite brain-spin;box-shadow:0 0 28px #0d715b29}.brain-orb.thinking span{animation:3s linear infinite brain-counter}.brain-identity>div:last-child{gap:2px;display:grid}.brain-identity small{color:#9aa59f;font:600 8px var(--font-geist-mono), monospace;letter-spacing:.13em}.brain-identity strong{font-family:var(--font-noto-serif-sc), serif;font-size:15px}.brain-identity p{color:#8a9690;margin:1px 0 0;font-size:8px}.engine-selector{grid-template-columns:1fr 1fr 1fr;gap:6px;margin-top:15px;display:grid}.engine-selector button{text-align:left;cursor:pointer;background:#ffffff80;border:1px solid #dce1dc;justify-content:space-between;gap:8px;min-width:0;padding:9px}.engine-selector button:disabled{cursor:wait;opacity:.7}.engine-selector button.active{border-color:var(--jade);box-shadow:inset 2px 0 0 var(--jade);background:#eaf1eb}.engine-selector button.classic.active{background:#eef3f6;border-color:#6a8498;box-shadow:inset 2px 0 #6a8498}.engine-selector button.rapfi.active{border-color:var(--gold);box-shadow:inset 2px 0 0 var(--gold);background:#f7f1e7}.engine-selector button>span{gap:2px;min-width:0;display:grid}.engine-selector strong{font-size:9px}.engine-selector small{color:#8f9a94;font-size:7px}.engine-selector em{color:var(--jade);font:600 7px var(--font-geist-mono), monospace;flex:none;font-style:normal}.engine-selector .classic em{color:#5f7588}.engine-selector .rapfi em{color:#9a6b2e}.arena-engine-summary{grid-template-columns:1fr 1fr;gap:6px;margin-top:15px;display:grid}.arena-engine-summary span{background:#ffffff7a;border:1px solid #dde2dd;align-items:center;gap:6px;padding:9px;font-size:8px;display:flex}.engine-load{gap:5px;margin-top:8px;display:grid}.engine-load>span{background:#e2e6e2;height:3px;overflow:hidden}.engine-load i{background:linear-gradient(90deg, var(--gold), #d6b36e);height:100%;transition:width .2s;display:block}.engine-load small{color:#8f9993;font-size:7px}.coach-style-grid{grid-template-columns:repeat(3,1fr);gap:4px;margin-top:9px;display:grid}.coach-style-grid button{cursor:pointer;background:#f0f3ee;border:1px solid #0000;gap:2px;min-width:0;padding:7px 3px;display:grid}.coach-style-grid button.active{color:var(--jade-deep);background:#fff;border-color:#0d715b59}.coach-style-grid strong{font-size:8px}.coach-style-grid small{color:#929d97;font-size:7px}.subheading{justify-content:space-between;margin-bottom:12px;font-size:10px;font-weight:650}.subheading em.live{color:var(--jade)}.difficulty-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;display:grid}.difficulty{text-align:left;cursor:pointer;background:#ffffff75;border:1px solid #dce1dc;gap:3px;min-height:49px;padding:7px 6px;display:grid}.difficulty:hover{border-color:#9bb8aa}.difficulty.active{border-color:var(--jade);box-shadow:inset 2px 0 0 var(--jade);background:#eaf1eb}.difficulty span{font:600 11px var(--font-noto-serif-sc), serif}.difficulty small{color:#8c9791;font-size:7px;line-height:1.3}.difficulty-detail{color:#6d7a74;margin:8px 0 0;font-size:9px;line-height:1.65}.difficulty-record{color:#9a7644;font:650 9px / 1.55 var(--font-geist-mono), monospace;letter-spacing:.02em;margin:4px 0 0}.evaluation-chart{background:linear-gradient(#0d715b09 1px,#0000 1px) 0 0/100% 25%,linear-gradient(90deg,#0d715b09 1px,#0000 1px) 0 0/25% 100%,#ffffff85;border:1px solid #e0e5df;margin-bottom:13px;padding:9px 9px 6px}.chart-legend{color:#87938d;justify-content:space-between;gap:8px;font-size:8px}.chart-legend span{align-items:center;gap:4px;display:flex}.chart-legend i{border-radius:50%;width:8px;height:8px;display:inline-block}.chart-legend .black-dot{background:#202724;box-shadow:0 1px 2px #00000047}.chart-legend .white-dot{background:#fff;border:1px solid #9ba49e;box-shadow:0 1px 2px #0000001f}.chart-legend strong{color:#222b27;font:650 11px var(--font-geist-mono), monospace}.chart-legend .white-series strong{color:#8a6a3c}.chart-legend small{color:#a0aaa4;text-align:center;flex:1;font-size:7px}.evaluation-chart svg{width:100%;height:116px;display:block;overflow:visible}.chart-scale-label{fill:#9aa59f;font:500 6px var(--font-geist-mono), monospace}.chart-grid-line{stroke:#e2e6e1;stroke-width:.65px;stroke-dasharray:2 5}.chart-even-line{stroke:#b9c3bd;stroke-width:.75px;stroke-dasharray:4 4}.chart-area-black{fill:#20272414}.chart-area-white{fill:#b6853e1a}.chart-line-black,.chart-line-white,.chart-line-white-outline{fill:none;stroke-linecap:round;stroke-linejoin:round}.chart-line-black{stroke:#202724;stroke-width:1.35px;filter:drop-shadow(0 1px 1px #11181524)}.chart-line-white-outline{stroke:#9ba49e;stroke-width:2.6px;opacity:.72}.chart-line-white{stroke:#fff;stroke-width:1.4px;filter:drop-shadow(0 1px 1px #53432a1f)}.chart-point-black{fill:#202724;stroke:#fff;stroke-width:1.5px}.chart-point-white{fill:#fff;stroke:#9a7644;stroke-width:2px}.chart-axis{color:#98a39d;font:500 7px var(--font-geist-mono), monospace;justify-content:space-between;display:flex}.search-stats{grid-template-columns:repeat(3,1fr);gap:6px;margin-top:16px;display:grid}.search-stats div{background:#f0f3ee;gap:3px;padding:8px;display:grid}.search-stats span{color:#8c9892;font-size:7px}.search-stats strong{font:500 12px var(--font-geist-mono), monospace}.search-stats small{font-size:7px}.candidate-list{align-content:start;gap:10px;min-height:122px;display:grid}.candidate{gap:9px}.candidate-rank{color:#a5afaa;font:500 8px var(--font-geist-mono), monospace}.candidate-main{flex:1;gap:5px;display:grid}.candidate-main>div{justify-content:space-between}.candidate-main strong{font:600 11px var(--font-geist-mono), monospace}.candidate-main small{color:#8d9892;font-size:8px}.candidate-bar{background:#e2e6e2;height:2px}.candidate-bar i{background:var(--jade);height:100%;transition:width .3s;display:block}.candidate>em{width:30px;color:var(--jade);text-align:right;font-size:7px;font-style:normal}.candidate-empty{color:#9ba59f;text-align:center;border:1px dashed #d7ddd8;align-content:center;place-items:center;gap:5px;min-height:115px;display:grid}.candidate-empty span{color:var(--gold);font-size:24px}.candidate-empty p{margin:0;font-size:9px;line-height:1.6}.brain-panel section.thought-card{z-index:1;border:1px solid #0d715b38;border-left:3px solid var(--jade);background:linear-gradient(135deg,#e7f0e9,#f9faf6);margin:0 0 20px;padding:14px 15px;position:relative;box-shadow:0 8px 18px #1f3c300f}.thought-sticky{display:none}.thought-card,.thought-feed,.thought-card .thought-copy{text-align:left}.thought-head{justify-content:flex-start;gap:8px}.thought-feed{flex-direction:column;align-items:stretch;margin-top:8px;display:flex}.thought-pulse{background:var(--jade);border-radius:50%;width:6px;height:6px;display:inline-block}.thought-card strong{font-size:10px}.thought-card em{color:var(--jade);font:600 7px var(--font-geist-mono), monospace;letter-spacing:.12em;margin-left:auto;font-style:normal}.thought-card p,.thought-card .thought-copy{color:#52625b;margin:8px 0 0;font-size:10px;line-height:1.72}.thought-feed .thought-feed-item{text-align:left;width:100%;margin:0;padding:0 0 4px;display:block}.thought-feed .thought-feed-item+.thought-feed-item{border-top:1px solid #0d715b38;padding-top:4px}.thought-feed .thought-feed-item.is-prev{opacity:.58}.thought-feed .thought-feed-item.is-new{opacity:1}.thought-feed .thought-feed-item.is-enter{animation:.85s linear thought-enter}@keyframes thought-enter{0%{opacity:.35;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.thought-copy{font-weight:500}.thought-reason{color:var(--jade-deep);font:700 11px var(--font-noto-serif-sc), serif;letter-spacing:.04em;margin-right:6px}.thought-pick{color:var(--jade-deep);font:600 9px/1.4 var(--font-geist-mono), monospace;letter-spacing:.02em;white-space:nowrap;background:#ffffffb8;border:1px solid #0d715b2e;margin-left:6px;padding:1px 6px;display:inline-block}.side-chip{vertical-align:baseline;white-space:nowrap;border-radius:999px;align-items:center;gap:3px;margin:0 2px;padding:0 6px 0 4px;font-weight:700;line-height:1.8;display:inline-flex}.side-chip .mini-stone{flex:none;width:9px;height:9px}.side-chip.black{color:#1a1f1c;background:#181c1a1a;box-shadow:inset 0 0 0 1px #14181647}.side-chip.white{color:#5a5248;background:#ffffffb8;box-shadow:inset 0 0 0 1px #786e5f59}.study-engine-tag{color:#7a8a82;font:500 8px/1.4 var(--font-geist-mono), monospace;letter-spacing:.04em;margin-top:8px;display:block}.transfer-backdrop{z-index:120;padding:max(12px, env(safe-area-inset-top,0px)) max(12px, env(safe-area-inset-right,0px)) max(12px, env(safe-area-inset-bottom,0px)) max(12px, env(safe-area-inset-left,0px));-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#121a179e;place-items:center;display:grid;position:fixed;inset:0;overflow:auto}.transfer-dialog{background:#fafbf7;border:1px solid #0d715b38;width:min(720px,100%);min-width:0;max-width:100%;padding:22px;overflow-x:hidden;box-shadow:0 28px 70px #00000040}.history-dialog{width:min(820px,100%);max-width:100%}.transfer-head{justify-content:space-between;align-items:start;gap:20px;display:flex}.transfer-head small{color:var(--jade);font:650 7px var(--font-geist-mono), monospace;letter-spacing:.18em}.transfer-head h2{font:600 21px var(--font-noto-serif-sc), serif;margin:4px 0 0}.transfer-head>button{color:#75827c;cursor:pointer;background:0 0;border:1px solid #d8ded9;width:30px;height:30px;font-size:20px}.history-dialog .transfer-head h2{margin:0}.history-dialog .transfer-head small{color:#8a968f;font:500 11px/1.3 var(--font-geist-mono), monospace;letter-spacing:0;margin-top:4px;display:block}.transfer-dialog>p{color:#718079;margin:13px 0 8px;font-size:10px}.transfer-dialog textarea{resize:vertical;color:#39433f;width:100%;font:500 9px/1.65 var(--font-geist-mono), monospace;background:#fff;border:1px solid #d8ded9;outline:none;padding:11px}.transfer-dialog textarea:focus{border-color:var(--jade);box-shadow:0 0 0 2px #0d715b14}.transfer-actions{flex-wrap:wrap;justify-content:flex-end;gap:7px;margin-top:12px;display:flex}.transfer-actions button{color:#65736c;cursor:pointer;background:#fff;border:1px solid #d8ded9;min-height:34px;padding:0 16px;font-size:9px}.transfer-actions button.primary{border-color:var(--jade-deep);background:var(--jade-deep);color:#fff}.transfer-actions button:disabled{cursor:not-allowed;opacity:.45}.history-section{display:none}.history-dialog .history-dialog-list{max-height:min(420px,55vh);margin:8px 0 0;overflow:auto}.history-toolbar{color:#65736c;font:500 10px/1.4 var(--font-geist-mono), monospace;border-top:1px solid #e8eee9;flex-wrap:wrap;align-items:center;gap:8px 12px;margin-top:10px;padding-top:8px;display:flex}.history-check-all,.history-page-size{cursor:pointer;align-items:center;gap:6px;display:inline-flex}.history-page-size select{color:#445149;min-height:28px;font:inherit;background:#fff;border:1px solid #d8ded9;padding:0 6px}.history-batch-delete,.history-pager button{color:#65736c;min-height:28px;font:inherit;cursor:pointer;background:#fff;border:1px solid #d8ded9;padding:0 10px}.history-batch-delete:disabled,.history-pager button:disabled{cursor:not-allowed;opacity:.45}.history-pager{align-items:center;gap:8px;margin-left:auto;display:inline-flex}.history-check{cursor:pointer;background:#f7faf7;border-right:1px solid #e0e7e1;flex-shrink:0;place-items:center;width:34px;display:grid}.board-index{color:#7a877f;min-width:28px;font:600 10px/1 var(--font-geist-mono), monospace;background:#f3f6f3;border-right:1px solid #e0e7e1;flex-shrink:0;align-self:stretch;place-items:center;padding:0 4px;display:grid}.history-list li.history-selected{background:#f3faf6;border-color:#9fc5b6}.history-dialog .history-empty{margin:12px 0 4px}.history-analyze{gap:10px;margin-top:8px;display:grid}.history-analyze-summary{gap:6px;margin:0;padding:0;list-style:none;display:grid}.history-analyze-summary li{color:#445149;font:500 11px/1.55 var(--font-noto-serif-sc), serif;background:#f7faf7;border:1px solid #e4ebe5;padding:8px 10px}.history-analyze-table-wrap{border:1px solid #e0e7e1;max-height:min(320px,46vh);overflow:auto}.history-analyze-table{border-collapse:collapse;width:100%;font:500 10px/1.4 var(--font-geist-mono), monospace}.history-analyze-table th,.history-analyze-table td{text-align:left;white-space:nowrap;border-bottom:1px solid #e8eee9;padding:6px 8px}.history-analyze-table th{color:#65736c;background:#f1f5f1;font-weight:600;position:sticky;top:0}.history-analyze-table td:first-child,.history-analyze-table th:first-child{background:#fbfcfb;position:sticky;left:0}.history-analyze-table th:first-child{z-index:1;background:#f1f5f1}.history-list{gap:6px;max-height:240px;margin:0;padding:0;list-style:none;display:grid;overflow:auto}.history-list li{background:#fbfcfb;border:1px solid #e0e7e1;flex-direction:column;align-items:stretch;gap:0;display:flex;overflow:hidden}.history-list .board-card-bar{background:#f7faf7;border-bottom:1px solid #e0e7e1;align-items:stretch;min-height:32px;display:flex}.history-list .board-card-bar .history-check{background:0 0;border-right:0}.history-list .board-card-bar .history-item-actions{border-left:1px solid #e0e7e1;margin-left:auto;display:flex}.history-list .history-card-body{align-items:stretch;min-width:0;display:flex}.history-list .history-card-body .board-index{background:#f3f6f3;border-right:1px solid #e0e7e1}.history-list .board-thumb{border:0;border-right:1px solid #d5ddd6;flex:0 0 48px;align-self:center;width:48px;min-width:48px;height:48px;min-height:48px;margin:0}.board-thumb{box-sizing:border-box;aspect-ratio:1;background:linear-gradient(90deg,#788c8047 1px,#0000 1px) 0 0/12.5% 100%,linear-gradient(#788c8047 1px,#0000 1px) 0 0/100% 12.5%,#dfe8db;border:0;border-right:1px solid #d5ddd6;flex:0 0 48px;align-self:center;width:48px;min-width:48px;height:48px;min-height:48px;margin:0;display:block;position:relative}.board-thumb.is-empty{background:#eef2ee}.board-thumb>.b,.board-thumb>.w{border-radius:50%;display:block;position:absolute;transform:translate(-50%,-50%)}.board-thumb>.b{background:#121512;box-shadow:0 0 0 .4px #ffffff1f}.board-thumb>.w{background:#fff;box-shadow:inset 0 0 0 1px #6d7a72,0 0 0 .5px #0000002e}.board-code-line{color:#a0aaa4;max-width:100%;font:400 8px/1.35 var(--font-geist-mono), monospace;word-break:break-all;white-space:normal;margin-top:2px;display:block;overflow:hidden}.history-list li.history-starred{background:#fffcf4;border-color:#d4c49a}.history-list li.history-starred .board-card-bar{background:#f7f0de}.history-main{text-align:left;flex:1;align-content:center;gap:3px;min-width:0;padding:8px 10px;display:grid;overflow:hidden}.history-main strong{color:#33413b;font:600 11px/1.35 var(--font-noto-serif-sc), serif}.item-title-row{align-items:baseline;gap:8px;min-width:0;display:flex}.item-title-row strong,.item-title-row .favorite-name{flex:1;min-width:0}.item-title-row .meta-time{color:#8a968f;font:500 9px/1.35 var(--font-geist-mono), monospace;flex-shrink:0}.history-main small,.favorite-main .board-meta{color:#8a968f;font:500 9px/1.4 var(--font-geist-mono), monospace}.board-meta{flex-wrap:wrap;align-items:center;gap:5px;display:flex}.board-meta .meta-chip{font:600 9px/1.45 var(--font-geist-mono), monospace;border-radius:3px;padding:1px 6px;display:inline-block}.board-meta .meta-mode.mode-ai{color:#0d715b;background:#0d715b1f}.board-meta .meta-mode.mode-pvp{color:#8a6a1e;background:#9a7b2d24}.board-meta .meta-mode.mode-arena{color:#3d6b8c;background:#3d6b8c1f}.board-meta .meta-mode.mode-challenge{color:#a85d3a;background:#a85d3a1f}.board-meta .meta-match,.board-meta .meta-board{color:#5a6861;background:#5a686114}.board-meta .meta-board.rule-free{color:#0d715b;background:#0d715b1f}.board-meta .meta-board.rule-exact{color:#4a6fa5;background:#4a6fa51f}.board-meta .meta-board.rule-renju{color:#b54a4a;background:#b54a4a1f}.board-meta .meta-time{color:#8a968f;font:500 9px/1.4 var(--font-geist-mono), monospace}.history-item-actions{border-left:0;flex-shrink:0;align-items:stretch;display:flex}.history-star,.history-delete,.history-use{color:#8a968f;cursor:pointer;background:0 0;border:0;min-width:36px;padding:0 8px;font-size:10px}.history-use{min-width:44px;color:var(--jade-deep);font:600 9px var(--font-noto-serif-sc), serif;border-right:1px solid #e0e7e1}.history-use:hover{background:#0d715b14}.history-star{color:#b8a56a;font-size:14px;line-height:1}.history-star.on{color:#c49a2a}.history-star:hover,.history-delete:hover{color:#445149;background:#eef2ef}.history-delete:hover{color:#a34b4b;background:#f7ecec}.history-empty{color:#8a968f;margin:0;font-size:10px;line-height:1.55}.history-clear{color:#6d7a74;cursor:pointer;background:#ffffffb8;border:1px solid #dce3dd;width:100%;min-height:28px;font-size:10px}.history-clear:hover{color:#445149;border-color:#b8c4bc}.favorite-list{border-top:1px solid #e4ebe5;margin-top:16px;padding-top:14px}.favorite-list-head{justify-content:space-between;align-items:baseline;margin-bottom:8px;display:flex}.favorite-list-head strong{font:600 12px var(--font-noto-serif-sc), serif;color:#2f3b36}.favorite-list-head small{color:#8a968f;font:500 8px var(--font-geist-mono), monospace}.favorite-list ul{gap:6px;max-height:220px;margin:0;padding:0;list-style:none;display:grid;overflow:auto}.favorite-list li{background:#fbfcfb;border:1px solid #e0e7e1;flex-direction:row;align-items:stretch;gap:0;display:flex;overflow:hidden}.favorite-list .board-thumb{border-right:1px solid #d5ddd6;margin:0}.favorite-main{flex:1;align-content:center;gap:3px;min-width:0;padding:8px 10px;display:grid;overflow:hidden}.favorite-name{color:#33413b;width:100%;font:600 10px/1.3 var(--font-noto-serif-sc), serif;background:0 0;border:0;outline:none;padding:0}.favorite-name:focus{color:var(--jade-deep)}.favorite-main .board-meta{word-break:normal}.favorite-actions{border-left:1px solid #e0e7e1;flex-direction:column;flex:none;justify-content:center;align-items:stretch;display:flex}.favorite-use{min-width:52px;min-height:28px;color:var(--jade-deep);font:600 9px var(--font-noto-serif-sc), serif;cursor:pointer;white-space:nowrap;background:0 0;border:0;flex:auto;padding:4px 10px}.favorite-actions .favorite-use+.favorite-use{border-top:1px solid #e0e7e1}.favorite-use:hover{background:#0d715b14}.favorite-remove{color:#9aa59e;cursor:pointer;background:0 0;border:0;border-left:1px solid #e0e7e1;width:32px;font-size:16px}.favorite-empty{color:#8a968f;margin:0;font-size:10px;line-height:1.6}@keyframes stone-in{0%{opacity:1;transform:translate(-50%,-50%)scale(.88)}to{opacity:1;transform:translate(-50%,-50%)scale(1)}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes hint{50%{opacity:.38;transform:translate(-50%,-50%)scale(1.16)}}@keyframes pulse{50%{opacity:.35;box-shadow:0 0 0 7px #0d715b14}}@keyframes brain-spin{to{transform:rotate(405deg)}}@keyframes brain-counter{to{transform:rotate(-405deg)}}@media (max-width:1180px){.workspace{grid-template-columns:224px minmax(540px,1fr);grid-template-areas:"modes game""brain brain"}.brain-panel{border-top:1px solid var(--line);border-left:0;grid-template-columns:1.35fr .85fr 1.2fr .85fr;gap:18px;display:grid}.brain-panel section{border:0;margin:0;padding:0}.brain-panel section.thought-card{padding:13px}}@media (max-width:860px){.topbar{z-index:90;grid-template-columns:1fr auto;min-height:58px;padding:8px 12px;position:sticky;top:0}.topbar-center,.brand-lockup p{display:none}.menu-toggle{display:flex}.drawer-backdrop{z-index:95;background:#121c186b;border:0;display:block;position:fixed;inset:0}.workspace{flex-direction:column;display:flex}.play-stack{flex-direction:column;order:1;align-items:center;padding:8px 8px 0;display:flex}.game-stage{display:contents}.mode-panel{z-index:100;overscroll-behavior:contain;border:0;border-left:1px solid var(--line);background:#fbfcf8;order:0;gap:18px;width:min(360px,92vw);padding:16px 16px 28px;transition:transform .24s;position:fixed;top:0;bottom:0;right:0;overflow-y:auto;transform:translate(105%);box-shadow:-16px 0 40px #14201c2e}.mode-panel.open{transform:translate(0)}.drawer-head{justify-content:space-between;align-items:center;margin-bottom:4px;display:flex}.drawer-head strong{font:600 16px var(--font-noto-serif-sc), serif;color:#24312c}.drawer-close{color:#66736d;cursor:pointer;background:0 0;border:0;width:36px;height:36px;font-size:24px;line-height:1}.drawer-play-engine{border-top:1px solid var(--soft-line);gap:12px;padding-top:8px;display:grid}.drawer-play-engine .engine-selector{margin-top:-5px}.drawer-play-engine .difficulty-section{border:0;margin:0;padding:0}.desktop-play-engine{display:none!important}.brain-panel{flex-direction:column;order:1;grid-template-columns:none;width:100%;padding:12px 14px 24px;display:flex}.mode-list{grid-template-columns:1fr}.record-card-sidebar{margin-bottom:0;display:block}.record-card-mobile{display:none}.mode-panel .record-card{box-shadow:none;padding:10px 10px 8px}.mode-panel .record-title{margin-bottom:8px;font-size:12px}.mode-panel .record-grid{gap:6px}.mode-panel .record-grid div{gap:2px;padding:6px 2px}.mode-panel .record-grid strong{font-size:18px}.mode-panel .record-grid span{font-size:10px}.mode-panel .record-actions{margin-top:8px}.mode-panel .record-reset,.mode-panel .record-history{min-height:28px;margin-top:0;font-size:11px}.players-bar{width:100%}.board-sticky{z-index:24;background:linear-gradient(#f4f5f1 72%,#f4f5f1eb);width:100%;max-width:100%;padding:4px 0 8px;position:sticky;top:58px;box-shadow:0 10px 18px #17201d14}.stone{width:86%;animation-duration:50ms}.move-number{font:700 clamp(8px, 2.6vw, 11px) var(--font-geist-mono), monospace}.stone .move-number.is-last{font-size:calc(clamp(8px,2.6vw,11px) + 1px)}.gomoku-board.size-19 .move-number{font:700 clamp(6px, 2vw, 9px) var(--font-geist-mono), monospace}.gomoku-board.size-19 .stone .move-number.is-last{font-size:calc(clamp(6px,2vw,9px) + 1px)}.board-frame{align-self:center;width:min(100%,100dvh - 280px)}.game-controls{flex-wrap:nowrap;align-items:stretch;width:100%;min-width:0;margin-top:10px;overflow:visible}.thought-sticky{border:1px solid #0d715b38;border-left:3px solid var(--jade);text-align:left;background:linear-gradient(135deg,#e7f0e9,#f9faf6);align-self:stretch;width:100%;max-width:100%;margin:8px 0 0;padding:10px 12px;display:block;box-shadow:0 8px 18px #1f3c300f}.thought-sticky p,.thought-sticky .thought-copy{margin:6px 0 0;font-size:12px;line-height:1.55}.thought-sticky .thought-feed{margin-top:6px}.thought-sticky .thought-feed-item{-webkit-line-clamp:unset;display:block}.thought-sticky .thought-feed-item.is-prev{display:none}.transfer-dialog,.history-dialog{width:100%;max-width:100%}.brain-panel .thought-panel{display:none}.brain-panel section{border:0;border-bottom:1px solid var(--soft-line);margin:0 0 14px;padding:0 0 14px}.brain-panel section.evaluation-section{order:1}.brain-panel section.candidate-section{order:2}.player div small{font-size:9px}.player div strong{font-size:13px}.game-controls button{font-size:11px}.mode-card{padding:10px 8px}.mode-copy strong{font-size:14px}.mode-copy small{font-size:11px}.setting-row{min-height:40px;font-size:13px}.segmented button{height:30px;font-size:12px}.section-label{font-size:11px}.difficulty span{font-size:12px}.difficulty small{font-size:9px}.difficulty-detail,.difficulty-record{font-size:11px}.engine-selector button{min-height:52px}.engine-selector strong{font-size:12px}.engine-selector small,.engine-selector em{font-size:10px}.candidate strong{font-size:13px}.candidate small,.candidate em{font-size:11px}.subheading{font-size:12px}}@media (max-width:580px){.brand-line span,.local-badge{display:none}.topbar{justify-content:space-between;min-height:52px;display:flex}.brand-mark{width:34px;height:34px}.brand-line h1{font-size:17px}.play-stack{padding:6px 4px 0}.players-bar{gap:1px;margin-bottom:6px}.player{flex:1;gap:7px;min-width:0;padding-inline:3px}.player-stone{width:28px;height:28px}.player>b{display:none}.player div small{font-size:10px}.player div strong{font-size:13px}.player-used{font-size:11px}.versus{min-width:35px}.versus span{display:none}.versus small{font-size:10px}.challenge-banner{grid-template-columns:auto 1fr auto;align-items:center;gap:8px;padding:8px 10px;display:grid;overflow:hidden}.challenge-banner span{white-space:nowrap;font-size:11px}.challenge-banner .challenge-note{text-align:center;min-width:0;font-size:11px}.challenge-banner .challenge-nav{flex-shrink:0}.challenge-banner .challenge-nav button{height:30px;padding:0 8px;font-size:11px}.board-sticky{top:52px}.stone{width:90%;animation-duration:50ms}.move-number{font:700 clamp(8px, 2.8vw, 12px) var(--font-geist-mono), monospace}.stone .move-number.is-last{font-size:calc(clamp(8px,2.8vw,12px) + 1px)}.gomoku-board.size-19 .move-number{font:700 clamp(6px, 2.2vw, 9px) var(--font-geist-mono), monospace}.gomoku-board.size-19 .stone .move-number.is-last{font-size:calc(clamp(6px,2.2vw,9px) + 1px)}.board-frame{width:min(100%,100dvh - 300px);padding:5px;box-shadow:0 0 0 1px #795027,0 0 0 3px #b48143,0 12px 30px #45301933}.board-rim{padding:15px 8px 8px 17px}.column-labels{top:1px;left:17px;right:8px}.row-labels{top:15px;bottom:8px;left:1px}.column-labels span,.row-labels span{font-size:10px}.board-frame.slim-border{padding:0;box-shadow:0 0 0 1px #704821,0 8px 20px #45301929}.board-frame.slim-border .board-rim{padding:1px}.board-frame.slim-border .column-labels,.board-frame.slim-border .row-labels{display:none}.game-controls{flex-wrap:nowrap;justify-content:center;gap:4px;margin-top:10px}.turn-indicator{display:none}.game-controls button{white-space:nowrap;height:38px;padding-inline:6px;font-size:11px}.control-group{flex-wrap:nowrap;flex:auto;min-width:0}.board-transfer-wrap{flex:none}.control-group button{flex:none;min-width:0}.control-group .icon-btn{flex:1 1 0;width:auto;min-width:28px;max-width:50px;padding-inline:0;overflow:hidden}.board-transfer-wrap>button{width:auto;min-width:0;padding-inline:8px}.board-transfer-wrap .icon-btn{flex:none;width:40px;min-width:40px;max-width:40px;padding-inline:0}.game-controls .new-game{flex:none;padding-inline:8px}.control-icon{margin-right:3px;font-size:12px}.arena-start-overlay{padding:10px;inset:5px}.arena-start-card{padding:14px}.arena-start-card h2{font-size:18px}.arena-start-card>p{margin-bottom:10px;font-size:11px}.arena-side{padding:7px}.arena-side button{min-height:28px;padding:2px;font-size:11px}.result-bar{flex-wrap:wrap;gap:8px;padding:10px;bottom:6px;left:6px;right:6px}.result-bar-copy strong{font-size:16px}.result-bar-copy p,.result-bar-copy small{font-size:11px}.result-bar-actions{width:100%}.result-bar-actions button{flex:1;font-size:12px}.mode-panel{width:min(340px,94vw);padding:14px 14px 24px}.mode-card{padding:10px 8px}.mode-mark{width:28px;height:28px}.brain-panel{padding:10px 12px 22px}.evaluation-chart svg{height:132px}.engine-selector button{min-height:50px}.thought-sticky p,.thought-sticky .thought-copy{font-size:12px}.transfer-dialog,.history-dialog{width:100%;max-width:100%;padding:16px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;animation-duration:0s!important;animation-iteration-count:1!important}.win-line line{stroke-dashoffset:0!important;opacity:1!important;animation:none!important}}