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14px}.history-scroll{flex:auto;height:auto;min-height:0}.empty-history{padding:8px 10px}.empty-history>span{font-size:20px}}.board-frame{position:relative}.web-app-status{color:#526d49;border:1px solid #dce3da;border-radius:10px;flex-wrap:wrap;flex-shrink:0;align-items:center;gap:8px;padding:10px 12px;font-size:12px;display:flex}.web-app-status small{color:#7c8b72;flex-basis:100%;font-size:11px;line-height:1.6}.web-app-status button{min-height:44px;padding:8px 12px;font-size:12px}.records-button{color:#315740;flex-shrink:0;justify-content:space-between;align-items:center;width:100%;font-size:12px;display:flex}.records-button span{color:#7c8b72;font-size:11px}.game-records{gap:12px;max-height:50dvh;margin:18px 0;padding:0;list-style:none;display:grid;overflow:auto}.game-record{background:#f7f9f3;border:1px solid #dce3da;border-radius:10px;min-width:0;padding:14px}.record-result{font-size:14px;display:block}.game-record dl{gap:8px;margin:14px 0;font-size:12px;display:grid}.game-record dl>div{flex-wrap:wrap;justify-content:space-between;gap:12px;display:flex}.game-record dt{color:#7c8b72}.game-record dd{margin:0}.game-record .record-time-note{margin:0 0 12px;font-size:11px;line-height:1.5}.record-footer{color:#7c8b72;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;font-size:11px;display:flex}.record-footer button{white-space:nowrap;padding:7px 10px;font-size:11px}.records-empty{text-align:center;color:#647369;padding:30px 10px}.records-empty strong{font-size:14px}.records-empty p{margin-top:10px}.spinner{border:3px solid #d7e3d4;border-top-color:#3d6a4c;border-radius:50%;width:22px;height:22px;animation:.7s linear infinite engine-spin;display:block}.turn-card .spinner{width:28px;height:28px}.mobile-status .spinner{border-width:2px;width:16px;height:16px}.board-loading{z-index:2;color:#315740;background:#f7f6f0d9;flex-direction:column;justify-content:center;align-items:center;gap:12px;font-size:14px;font-weight:650;display:flex;position:absolute;inset:0}.board-loading .spinner{border-width:4px;width:40px;height:40px}@keyframes engine-spin{to{transform:rotate(360deg)}}.square-cell{position:relative}.square-fx,.board-fx,.mate-banner{pointer-events:none;position:absolute}.square-fx{z-index:4;inset:0}.square-fx.capture{background:radial-gradient(circle,#fff 0%,#e05548 34%,#e0554800 72%);animation:.55s ease-out fx-capture}.square-fx.check{background:radial-gradient(circle,#fff8 0%,#e0554800 72%);animation:1s ease-out fx-check;box-shadow:inset 0 0 0 5px #fff,0 0 16px 2px #e05548}.square-fx.mate{background:#e0554844;animation:.8s ease-out fx-mate;box-shadow:inset 0 0 0 5px #e05548}.board-fx{z-index:3;border-radius:4px;inset:0}.board-fx.check{animation:1.1s ease-out check-ring}.board-fx.mate{animation:.8s ease-out mate-flash}.board-frame.mate-shake{animation:.48s ease-in-out mate-shake}.mate-banner{z-index:5;color:#fff;letter-spacing:.35em;text-shadow:0 2px 18px #6d2418;place-items:center;font-size:clamp(32px,8vw,56px);font-weight:750;animation:1.2s ease-out forwards mate-banner;display:grid;inset:0}@keyframes fx-capture{0%{opacity:1;transform:scale(.2)}to{opacity:0;transform:scale(1.35)}}@keyframes fx-check{0%{opacity:0;transform:scale(.72)}22%{opacity:1;transform:scale(1)}to{opacity:0;transform:scale(1.08)}}@keyframes fx-mate{0%{opacity:.15}25%{opacity:1}to{opacity:.35}}@keyframes check-ring{0%{box-shadow:inset 0 0 #e0554800}28%{box-shadow:inset 0 0 0 16px #e05548d0}to{box-shadow:inset 0 0 #e0554800}}@keyframes mate-flash{0%{background:#e0554800}25%{background:#e055484d}to{background:#e0554800}}@keyframes mate-shake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(3px)}}@keyframes mate-banner{0%{opacity:0;transform:scale(.86)}18%{opacity:1;transform:scale(1)}70%{opacity:1}to{opacity:0}}.coach-panel{color:#2d5263;background:#f0f6f8;border:1px solid #cadde5;border-radius:12px;flex-shrink:0;min-width:0;margin-top:10px;padding:12px 16px}.coach-heading{justify-content:space-between;align-items:center;gap:12px;display:flex}.coach-heading h2{font-size:15px}.coach-heading button{white-space:nowrap;color:#2d607a;background:#fff;border-color:#b9d1df;min-height:44px;padding:8px 12px;font-size:12px}.coach-content{overscroll-behavior:contain;overflow-wrap:anywhere;max-height:180px;font-size:13px;line-height:1.7;overflow:auto}.coach-content p{margin:6px 0}.coach-content small{color:#607b87;font-size:11px}.coach-feedback{border-top:1px solid #d2e1e7;padding-top:6px}.coach-error{color:#86563b}.coach-error button{margin-left:8px;padding:6px 10px;font-size:12px}@media (width<=720px),(width<=960px) and (orientation:portrait){.board-column:has(.coach-panel) .board-slot{width:min(100%,100cqh - 238px)}.coach-panel{margin:6px 2px 0;padding:6px 10px}.coach-heading h2{font-size:13px}.coach-content{max-height:90px;font-size:12px}}@media (width>=721px) and (width<=1400px) and (height<=1100px) and (orientation:landscape){.coach-content{max-height:100px}.coach-panel{padding:6px 12px}}