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rgba(0,196,204,.25)}.theme-mini-board{width:36px;height:36px;border-radius:4px;overflow:hidden;display:grid;grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;box-shadow:0 2px 6px rgba(0,0,0,.5)}.theme-mini-board__square{aspect-ratio:1}.theme-option-name{font-size:.75rem;font-weight:600;color:var(--text-secondary);text-align:center}.theme-option-btn--active .theme-option-name{color:var(--accent-cyan)}.pieces-row{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:10px;gap:10px}.piece-option-btn{background:var(--bg-card);border:1px solid var(--border-color);border-radius:8px;padding:8px;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;align-items:center;gap:6px}.piece-option-btn:hover{background:var(--bg-card-hover);border-color:var(--text-muted)}.piece-option-btn--active{background:rgba(0,196,204,.1)!important;border-color:var(--accent-cyan)!important;box-shadow:0 0 10px rgba(0,196,204,.25)}.piece-preview-img{width:32px;height:32px;object-fit:contain;filter:drop-shadow(0 2px 4px rgba(0,0,0,.6))}.piece-option-name{font-size:.75rem;font-weight:600;color:var(--text-secondary)}.piece-option-btn--active .piece-option-name{color:var(--accent-cyan)}.theme-overlay-footer{margin-top:auto;display:flex;justify-content:center;padding-top:12px;border-top:1px solid var(--border-color)}.theme-overlay-footer-btn{background:linear-gradient(135deg,var(--accent-cyan),var(--accent-cyan-dim));color:var(--text-inverse);border:none;font-weight:700;font-size:.85rem;padding:10px 32px;border-radius:20px;cursor:pointer;transition:all .2s ease;box-shadow:var(--shadow-glow-cyan)}.theme-overlay-footer-btn:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(0,196,204,.4)}.settings-layout{display:grid;grid-template-columns:1fr 440px;grid-gap:32px;gap:32px;align-items:start}.settings-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));grid-gap:12px;gap:12px}.sticky-preview{position:-webkit-sticky;position:sticky;top:24px}@media (max-width:1024px){.settings-layout{grid-template-columns:1fr;gap:24px}.sticky-preview{position:static}}.dashboard-section{margin-top:32px}.dashboard-section__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;gap:12px;flex-wrap:wrap}.dashboard-section__title{font-size:1.15rem;font-weight:800}.connect-card{max-width:620px}.recent-games-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));grid-gap:12px;gap:12px}.quick-links-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));grid-gap:16px;gap:16px}.review-games-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));grid-gap:12px;gap:12px}.analyze-layout{display:grid;grid-template-columns:1fr 380px;grid-gap:24px;gap:24px;align-items:start}.analyze-board-col{position:-webkit-sticky;position:sticky;top:32px;height:calc(100vh - 64px);display:flex;flex-direction:column;gap:8px;overflow:hidden;box-sizing:border-box;min-width:0}.analyze-col-header{display:flex;align-items:center;gap:10px;flex-shrink:0;overflow:hidden}.analyze-col-header__title{font-size:.9rem;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1 1}.analyze-board-fill{align-items:stretch;gap:12px}.analyze-board-fill,.analyze-board-only{flex:1 1;min-height:0;min-width:0;display:flex;overflow:hidden}.analyze-board-only{align-items:center;justify-content:center}.analyze-side{position:-webkit-sticky;position:sticky;top:32px;display:flex;flex-direction:column;gap:12px}.player-bar{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md)}.player-bar__dot{width:16px;height:16px;border-radius:50%;flex-shrink:0}.player-bar__dot--white{background:#ffffff;border:1.5px solid var(--text-secondary)}.player-bar__dot--black{background:#1e1e2e;border:1.5px solid rgba(255,255,255,.7)}.player-bar__name{font-weight:700;font-size:.95rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.player-bar__rating{color:var(--text-muted);font-size:.85rem;font-weight:500}.player-bar__tag{margin-left:auto;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted)}.player-bar__captured{display:inline-flex;align-items:center;gap:1px;margin-left:2px}.player-bar__captured-piece{font-family:DejaVu Sans Chess,sans-serif;font-size:1rem;line-height:1}.player-bar__captured--black .player-bar__captured-piece{color:#6b7280}.player-bar__captured--white .player-bar__captured-piece{color:#e5e7eb;text-shadow:0 0 1px rgba(0,0,0,.5)}.player-bar__material{margin-left:4px;font-size:.8rem;font-weight:700;color:var(--text-secondary)}.player-bar__clock{display:inline-flex;align-items:center;gap:5px;margin-left:10px;padding:3px 10px;font-size:.95rem;font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;color:var(--text-primary);background:var(--bg-surface);border-radius:6px}.puzzles-board-col{position:-webkit-sticky;position:sticky;top:32px;height:calc(100vh - 80px);display:flex;flex-direction:column;gap:8px;overflow:hidden;box-sizing:border-box;min-width:0}@media (min-width:901px){.page__container .puzzles-layout>div:last-child{position:-webkit-sticky;position:sticky;top:32px;max-height:calc(100vh - 80px);overflow-y:auto;overflow-x:hidden;box-sizing:border-box}}.puzzles-board-fill{flex:1 1;min-height:0;min-width:0;display:flex;align-items:center;justify-content:center;overflow:hidden}@media (max-width:1024px){.analyze-layout{grid-template-columns:1fr}.analyze-board-col{position:static;height:auto}.analyze-board-fill{max-height:calc(100vh - 300px);min-height:240px}.analyze-board-only{width:100%;max-width:clamp(240px,min(100%,calc(100dvh - 300px)),520px);aspect-ratio:1/1;margin:0 auto}.analyze-side{position:static}}@media (max-width:900px){.puzzles-board-col{position:static;height:auto;width:100%;max-width:100%}.puzzles-board-fill{width:100%;max-width:min(100%,calc(100dvh - 220px),520px);aspect-ratio:1/1;margin-inline:auto}}#chess-board,#chess-board *,.board-wrapper,.custom-dark-square,.custom-light-square{touch-action:none}#chess-board img,.board-wrapper img{-moz-user-select:none;user-select:none;-webkit-user-select:none;-webkit-user-drag:none;-webkit-touch-callout:none;pointer-events:none}@media (max-width:500px){.input-group{flex-direction:column!important;align-items:stretch!important;gap:12px!important}.input-group>*{width:100%!important;max-width:none!important}}.variation-container{margin-left:12px;border-left:1.5px solid var(--border-color);padding-left:10px;display:flex;flex-direction:column;gap:4px;margin-top:4px;margin-bottom:4px}.engine-loading-overlay{position:absolute;inset:0;justify-content:center;gap:16px;background:rgba(15,23,42,.85);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-radius:var(--radius-lg);z-index:50;padding:24px;text-align:center;animation:fadeIn .3s ease-out;color:#f8fafc}.engine-loading-container,.engine-loading-overlay{display:flex;flex-direction:column;align-items:center}.engine-loading-container{max-width:340px;gap:20px}.brain-spinner-wrapper{position:relative;width:72px;height:72px;display:flex;align-items:center;justify-content:center}.brain-emoji{font-size:2.2rem;z-index:2;animation:brainPulse 2s ease-in-out infinite}.spinner-ring{position:absolute;inset:0;border-radius:50%;border-left:3px solid rgba(0,200,230,.15);border-bottom:3px solid rgba(0,200,230,.15);border-top:3px solid rgba(0,200,230,.15);border-top-color:var(--accent-cyan);border-right:3px solid rgba(0,200,230,.15);border-right-color:var(--accent-cyan);animation:spin 1.2s cubic-bezier(.5,.1,.5,.9) infinite;z-index:1}.engine-loading-title{font-size:1.05rem;font-weight:700;color:var(--accent-cyan);margin:0;letter-spacing:.03em;text-shadow:0 0 12px rgba(0,200,230,.3)}.engine-loading-subtitle{font-size:.82rem;color:var(--text-secondary);line-height:1.6;margin:0}@keyframes brainPulse{0%,to{transform:scale(1);filter:drop-shadow(0 0 4px rgba(244,63,94,.2)) drop-shadow(0 0 12px rgba(0,200,230,.2))}50%{transform:scale(1.1);filter:drop-shadow(0 0 8px rgba(244,63,94,.4)) drop-shadow(0 0 20px rgba(0,200,230,.4))}}.puzzle-mode-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));grid-gap:16px;gap:16px}.puzzle-mode-card{display:flex;flex-direction:column;gap:8px;text-decoration:none;color:inherit;transition:transform .15s ease,border-color .15s ease,background .15s ease;cursor:pointer}.puzzle-mode-card:hover{transform:translateY(-4px);background:var(--bg-card-hover)}.puzzle-mode-card__icon{font-size:2.4rem}.puzzle-mode-card__title{font-size:1.1rem;font-weight:800}.puzzle-mode-card__desc{font-size:.85rem;color:var(--text-muted);line-height:1.5}.puzzle-theme-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));grid-gap:14px;gap:14px}.puzzle-theme-card{display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center;cursor:pointer;border:1px solid var(--border-color);transition:transform .15s ease,background .15s ease}.puzzle-theme-card:hover:not(:disabled){transform:translateY(-3px);background:var(--bg-card-hover)}.puzzle-theme-card--locked{opacity:.5;filter:grayscale(.8);cursor:not-allowed}.puzzle-theme-card__icon{font-size:2rem}.puzzle-theme-card__title{font-size:.9rem;font-weight:700}.puzzle-theme-card__locked,.puzzle-theme-card__meta{font-size:.72rem;color:var(--text-muted)}.puzzle-theme-card__meta{display:flex;justify-content:space-between;width:100%}.puzzle-theme-bar{width:100%;height:7px;border-radius:4px;background:var(--bg-surface);overflow:hidden}.puzzle-theme-bar__fill{height:100%;border-radius:4px;transition:width .5s ease}.puzzle-matchmaking{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;aspect-ratio:1;max-width:520px;margin:0 auto}.puzzle-elo-number{font-size:2.6rem;font-weight:900;color:var(--accent-gold);transition:color .2s ease}.puzzle-elo-number--up{color:var(--accent-green)}.puzzle-elo-number--down{color:var(--accent-red)}.puzzle-elo-delta{font-size:1.1rem;font-weight:800;animation:eloPop .5s ease}.puzzle-elo-delta--up{color:var(--accent-green)}.puzzle-elo-delta--down{color:var(--accent-red)}@keyframes eloPop{0%{transform:translateY(8px) scale(.8);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}.puzzle-result-card--win{border:1px solid var(--accent-green);box-shadow:0 0 20px rgba(16,185,129,.2)}.puzzle-result-card--loss{border:1px solid var(--accent-red);box-shadow:0 0 20px rgba(239,68,68,.2)}.rush-bar,.survival-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px}.survival-lives{display:flex;gap:6px;font-size:1.6rem}.survival-heart{transition:transform .2s ease}.survival-heart--lost{animation:heartBreak .5s ease forwards}@keyframes heartBreak{0%{transform:scale(1.3) rotate(0)}40%{transform:scale(1.1) rotate(-12deg)}to{transform:scale(1) rotate(0);opacity:.6}}.survival-streak{font-size:2rem;font-weight:900;color:var(--text-primary)}.survival-streak--hot{color:var(--accent-gold);text-shadow:0 0 12px rgba(251,191,36,.6);animation:flameGlow 1.2s ease-in-out infinite}@keyframes flameGlow{0%,to{text-shadow:0 0 10px rgba(251,191,36,.5)}50%{text-shadow:0 0 22px rgba(251,146,60,.9)}}.screen-shake{animation:screenShake .45s cubic-bezier(.36,.07,.19,.97)}@keyframes screenShake{10%,90%{transform:translateX(-2px)}20%,80%{transform:translateX(4px)}30%,50%,70%{transform:translateX(-8px)}40%,60%{transform:translateX(8px)}}.puzzle-gameover{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;aspect-ratio:1;max-width:520px;margin:0 auto;background:var(--bg-surface)}.rush-timer{font-size:2rem;font-weight:900;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;color:var(--text-primary)}.rush-timer--urgent{color:var(--accent-red);animation:timerPulse 1s ease-in-out infinite}@keyframes timerPulse{0%,to{transform:scale(1)}50%{transform:scale(1.12)}}.rush-score{font-size:1.6rem;font-weight:800;color:var(--accent-green)}.rush-critical{box-shadow:inset 0 0 0 3px rgba(239,68,68,.5);border-radius:12px;animation:critFlash 1s ease-in-out infinite}@keyframes critFlash{0%,to{box-shadow:inset 0 0 0 2px rgba(239,68,68,.25)}50%{box-shadow:inset 0 0 0 4px rgba(239,68,68,.7)}}.rush-timeline{display:flex;flex-wrap:wrap;gap:5px;margin-top:10px}.rush-dot{width:12px;height:12px;border-radius:50%;background:var(--bg-card-hover)}.rush-dot--solved{background:var(--accent-green)}.rush-dot--wrong{background:var(--accent-red);position:relative}.rush-dot--wrong:after{content:"";position:absolute;inset:0;background:linear-gradient(45deg,transparent 45%,#fff 0,#fff 55%,transparent 0);opacity:.7}.rush-dot--active{background:var(--accent-gold);animation:timerPulse .8s ease-in-out infinite}.rush-board-slide{animation:boardSlide .2s ease}@keyframes boardSlide{0%{transform:translateY(12px);opacity:.4}to{transform:translateY(0);opacity:1}}@media (prefers-reduced-motion:reduce){.rush-board-slide,.rush-critical,.rush-dot--active,.rush-timer--urgent,.screen-shake,.survival-heart--lost,.survival-streak--hot{animation:none}}