:root{--color-primary: #f0e8d8;--color-secondary: #a09080;--color-tertiary: #2a2520;--color-tertiary-hover:#332d28;--color-border: #3a3228;--color-border-light: #342e28;--color-surface: #221e1a;--color-bg: #1a1612;--color-gold: #d4a853;--color-gold-muted: #b8882e;--color-gold-text: #1a1510;--color-brand: #5b9cf6;--color-brand-hover: #3b7dd8;--color-brand-light: rgba(91, 156, 246, .15);--font-base: "Roboto", sans-serif;--clr-gold: var(--color-gold);--clr-border: var(--color-border);--clr-surface-1: var(--color-surface);--clr-surface-2: var(--color-tertiary);--clr-text-1: var(--color-primary);--clr-text-2: var(--color-secondary);--clr-text-3: var(--color-secondary);color-scheme:dark}@media(prefers-color-scheme:light){:root:not([data-theme=dark]){--color-primary: #1a1a1a;--color-secondary: #555;--color-tertiary: #f5f5f5;--color-tertiary-hover:#e8e8e8;--color-border: #e0e0e0;--color-border-light: #ddd;--color-surface: #fafafa;--color-bg: #ffffff;--color-gold: #b8882e;--color-gold-muted: #9e7429;--color-gold-text: #ffffff;--color-brand: #2563eb;--color-brand-hover: #1d4ed8;--color-brand-light: rgba(37, 99, 235, .12);color-scheme:light}}[data-theme=light]{--color-primary: #1a1a1a;--color-secondary: #555;--color-tertiary: #f5f5f5;--color-tertiary-hover:#e8e8e8;--color-border: #e0e0e0;--color-border-light: #ddd;--color-surface: #fafafa;--color-bg: #ffffff;--color-gold: #b8882e;--color-gold-muted: #9e7429;--color-gold-text: #ffffff;--color-brand: #2563eb;--color-brand-hover: #1d4ed8;--color-brand-light: rgba(37, 99, 235, .12);color-scheme:light}[data-theme=dark]{--color-primary: #f0e8d8;--color-secondary: #a09080;--color-tertiary: #2a2520;--color-tertiary-hover:#332d28;--color-border: #3a3228;--color-border-light: #342e28;--color-surface: #221e1a;--color-bg: #1a1612;--color-gold: #d4a853;--color-gold-muted: #b8882e;--color-gold-text: #1a1510;--color-brand: #5b9cf6;--color-brand-hover: #3b7dd8;--color-brand-light: rgba(91, 156, 246, 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min(460px, calc(100vw - 540px) );flex-shrink:0;width:var(--board-size);display:flex;flex-direction:column;gap:6px}.forge-palette{display:grid;grid-template-columns:repeat(6,1fr);gap:4px;width:100%}.forge-palette-item{aspect-ratio:1;display:flex;align-items:center;justify-content:center;border:1px solid var(--color-border);border-radius:4px;background:var(--color-surface);cursor:grab;transition:background .1s,border-color .1s}.forge-palette-item:hover{background:var(--color-tertiary-hover, rgba(255, 255, 255, .06));border-color:var(--color-gold, #d4a853)}.forge-palette-item--selected{background:var(--color-tertiary, rgba(255, 255, 255, .04));border-color:var(--color-gold, #d4a853);box-shadow:0 0 0 2px var(--color-gold, #d4a853)}.forge-palette-item:active{cursor:grabbing}.forge-palette-piece{width:78%;height:78%;pointer-events:none;-webkit-user-select:none;user-select:none}.forge-actions{display:flex;align-items:center;gap:3px;width:100%}.forge-actions-sep{width:1px;height:22px;background:var(--color-border);margin:0 3px;flex-shrink:0}.forge-actions-spacer{flex:1}.forge-action-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;flex:1;min-width:0;height:52px;border:1px solid var(--color-border);border-radius:8px;background:none;color:var(--color-secondary);cursor:pointer;font-size:15px;transition:background .12s,color .12s,border-color .12s;padding:0 4px}.forge-action-label{font-size:9px;font-weight:500;text-transform:uppercase;letter-spacing:.05em;color:var(--color-secondary);line-height:1;pointer-events:none}.forge-action-btn:hover{background:var(--color-tertiary-hover, rgba(255, 255, 255, .06));color:var(--color-primary);border-color:var(--color-primary)}.forge-action-btn:hover .forge-action-label{color:var(--color-primary)}.forge-action-btn:disabled{opacity:.4;cursor:default}.forge-action-btn--active{color:var(--color-gold, #d4a853);border-color:var(--color-gold, #d4a853);background:var(--color-tertiary, rgba(255, 255, 255, .04))}.forge-icon-compound{display:flex;align-items:center;justify-content:center;gap:1px;line-height:1}.forge-icon-pawn{width:18px;height:18px;pointer-events:none}.forge-icon-pawn-sm{width:11px;height:11px;pointer-events:none}.forge-icon-arrow-sm{font-size:9px;color:inherit}.forge-icon-clear{position:relative;display:inline-flex;align-items:center;justify-content:center}.forge-icon-slash{position:absolute;width:18px;height:18px;color:var(--color-secondary);pointer-events:none}.forge-board-wrap{width:100%}.forge-board-wrap .board{width:var(--board-size, min(460px, calc(100vw - 540px) ));height:var(--board-size, min(460px, calc(100vw - 540px) ))}.forge-sq{cursor:pointer}.forge-panel{flex:1;min-width:260px;max-width:360px;display:flex;flex-direction:column;gap:0;border:1px solid var(--color-border);border-radius:10px;overflow:hidden;background:var(--color-surface)}.forge-section{padding:10px 14px;border-bottom:1px solid var(--color-border)}.forge-section:last-child{border-bottom:none}.forge-section-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--color-secondary);margin-bottom:6px}.forge-fen-box{background:var(--color-bg);border:1px solid var(--color-border);border-radius:4px;padding:6px 8px;word-break:break-all;font-family:Courier New,monospace;font-size:11px;color:var(--color-gold, #d4a853);line-height:1.5;margin-bottom:6px}.forge-inline-row{display:flex;gap:6px;align-items:center}.forge-fen-input{flex:1;background:var(--color-bg);border:1px solid var(--color-border);border-radius:4px;color:var(--color-primary);font-family:Courier New,monospace;font-size:11px;padding:5px 7px;min-width:0}.forge-fen-input:focus{outline:none;border-color:var(--color-gold, #d4a853)}.forge-btn{display:inline-flex;align-items:center;gap:5px;padding:5px 10px;border:1px solid var(--color-border);border-radius:6px;background:var(--color-bg);color:var(--color-secondary);font-size:12px;font-weight:500;cursor:pointer;white-space:nowrap;transition:background .12s,color .12s;text-decoration:none;flex-shrink:0}.forge-btn:hover{background:var(--color-tertiary-hover, rgba(255, 255, 255, .06));color:var(--color-primary)}.forge-btn--success{color:#58c78a;border-color:#58c78a}.forge-btn--play{background:var(--color-gold, #d4a853);border-color:var(--color-gold, #d4a853);color:#1a1612;font-weight:700;justify-content:center}.forge-btn--play:hover{filter:brightness(1.1);color:#1a1612}.forge-cta-row{display:flex;gap:6px}.forge-cta-row .forge-btn{flex:1;justify-content:center}.forge-side-toggle{display:flex;gap:6px}.forge-side-btn{flex:1;justify-content:center;font-weight:600;font-size:12px}.forge-side-btn--active-white{background:#f0e8d8!important;color:#1a1612!important;border-color:#c8a869!important}.forge-side-btn--active-black{background:#2a2520!important;color:#f0e8d8!important;border-color:#605850!important}.forge-error{font-size:11px;color:var(--color-danger, #e87060);margin-top:4px}.forge-solver-locked{display:flex;align-items:flex-start;gap:8px;padding:8px;background:var(--color-bg);border:1px solid var(--color-border);border-radius:6px;font-size:12px;color:var(--color-secondary);line-height:1.5}.forge-solver-locked a{color:var(--color-gold, #d4a853);text-decoration:none}.forge-solver-locked a:hover{text-decoration:underline}.forge-solver-lock-icon{flex-shrink:0;margin-top:2px}.forge-solve-row{display:flex;gap:6px}.forge-solve-meta{font-size:11px;color:var(--color-secondary);margin:4px 0}.forge-solve-result{margin-top:6px;background:var(--color-bg);border:1px solid var(--color-border);border-radius:4px;padding:8px}.forge-solve-pv{display:flex;flex-wrap:wrap;gap:2px 4px;font-family:monospace;font-size:12px;color:var(--color-primary);line-height:1.7;margin-top:4px}.forge-solve-move{white-space:nowrap}.forge-solve-num{color:var(--color-gold, #d4a853);margin-right:2px}.forge-solve-inputs{display:flex;gap:6px;flex-wrap:wrap}.forge-solve-label{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--color-secondary);gap:6px;flex:1;min-width:100px}.forge-solve-input{width:52px;background:var(--color-bg);border:1px solid var(--color-border);border-radius:4px;color:var(--color-primary);font-family:monospace;font-size:11px;padding:3px 5px;text-align:right}.forge-solve-input:focus{outline:none;border-color:var(--color-gold, #d4a853)}.forge-key-table{border-collapse:collapse;width:100%;font-size:12px}.forge-key-table td{padding:4px 6px;border-bottom:1px solid var(--color-border);color:var(--color-secondary)}.forge-key-table tr:last-child td{border-bottom:none}.forge-key-table td:first-child{font-family:monospace;color:var(--color-gold, #d4a853);font-weight:600;width:48px}.forge-hints{display:flex;flex-direction:column;gap:4px}.forge-hint{font-size:11px;color:var(--color-secondary);line-height:1.5}.forge-hint--platform{display:flex;align-items:baseline;gap:6px}.forge-hint-tag{font-size:9px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--color-gold, #d4a853);opacity:.8;flex-shrink:0;min-width:48px}.forge-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;z-index:800;display:flex;align-items:center;justify-content:center}.forge-modal{background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;padding:20px 24px;min-width:240px;max-width:90vw;box-shadow:0 12px 32px #00000059}.forge-modal-title{font-size:14px;font-weight:700;color:var(--color-primary);margin-bottom:12px}.forge-modal-close{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:1px solid var(--color-border);border-radius:6px;background:none;color:var(--color-secondary);cursor:pointer;margin-left:auto;margin-top:12px;font-size:13px;transition:color .12s}.forge-modal-close:hover{color:var(--color-primary)}@media(max-width:900px){.forge-page{padding:8px 12px 16px}.forge-layout{flex-direction:column;align-items:stretch;gap:12px}.forge-board-area{--board-size: min(440px, calc(100vw - 24px) );width:100%;align-items:center}.forge-board-wrap .board{width:var(--board-size, min(440px, calc(100vw - 24px) ));height:var(--board-size, min(440px, calc(100vw - 24px) ))}.forge-panel{max-width:none}}