*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}:root{--color-bg:#0f0f1a;--color-surface:#1a1a2e;--color-surface-2:#16213e;--color-primary:#e2b714;--color-primary-hover:#f0c92a;--color-primary-dark:#b8940f;--color-text:#e8e8e8;--color-text-muted:#8888a0;--color-text-dim:#5a5a72;--color-border:#2a2a44;--color-success:#4ade80;--color-error:#f87171;--color-error-bg:rgba(248, 113, 113, 0.1);--color-warning:#fbbf24;--color-info:#60a5fa;--color-piece-white-filter:drop-shadow(0 1px 2px rgba(0,0,0,0.5));--color-piece-black-filter:drop-shadow(0 1px 2px rgba(0,0,0,0.3)) brightness(0.85);--color-piece-strip-bg:rgba(120, 120, 120, 0.15);--color-piece-strip-border:rgba(255, 255, 255, 0.08);--color-drag-overlay-bg:rgba(15, 15, 26, 0.75);--color-turn-white-bg:#d2d2d2;--color-turn-white-color:#222;--color-turn-black-bg:#333;--color-turn-black-color:#ddd;--color-turn-hover:rgba(190, 163, 62, 0.6);--color-eval-equal-bg:#4c4c4c;--color-eval-white-adv-bg:#6c6c6c;--color-eval-black-adv-bg:#a2a2a2;--radius:12px;--radius-sm:8px;--radius-lg:16px;--shadow:0 4px 24px rgba(0, 0, 0, 0.3);--shadow-sm:0 2px 8px rgba(0, 0, 0, 0.2);--font:'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;--transition:0.2s ease;--board-light:#f0d9b5;--board-dark:#b58863}[data-theme="light"]{--color-bg:#f5f5f7;--color-surface:#ffffff;--color-surface-2:#ebebf0;--color-primary:#286694;--color-primary-hover:#3a80b8;--color-primary-dark:#1d4d70;--color-text:#1a1a2e;--color-text-muted:#5a5a72;--color-text-dim:#8888a0;--color-border:#d0d0d8;--color-success:#22c55e;--color-error:#ef4444;--color-error-bg:rgba(239, 68, 68, 0.08);--color-warning:#f59e0b;--color-info:#3b82f6;--color-piece-white-filter:drop-shadow(0 1px 2px rgba(0,0,0,0.25));--color-piece-black-filter:drop-shadow(0 1px 2px rgba(0,0,0,0.15)) brightness(0.9);--color-piece-strip-bg:rgba(0, 0, 0, 0.06);--color-piece-strip-border:rgba(0, 0, 0, 0.1);--color-drag-overlay-bg:rgba(245, 245, 247, 0.85);--color-turn-white-bg:#e8e8e8;--color-turn-white-color:#222;--color-turn-black-bg:#444;--color-turn-black-color:#eee;--color-turn-hover:rgba(190, 163, 62, 0.6);--color-eval-equal-bg:#d0d0d0;--color-eval-white-adv-bg:#555;--color-eval-black-adv-bg:#d0d0d0;--shadow:0 4px 24px rgba(0, 0, 0, 0.08);--shadow-sm:0 2px 8px rgba(0, 0, 0, 0.06)}html{font-size:16px;scroll-behavior:smooth;scrollbar-gutter:stable}body{font-family:var(--font);background:var(--color-bg);color:var(--color-text);min-height:100vh;line-height:1.6;background-image:radial-gradient(ellipse at 20% 50%,rgb(226 183 20 / .03) 0%,transparent 50%),radial-gradient(ellipse at 80% 50%,rgb(226 183 20 / .02) 0%,transparent 50%)}@keyframes fadeInUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes spin{to{transform:rotate(360deg)}}.container{max-width:1100px;margin:0 auto;padding:1.5rem 1.5rem;min-height:100vh;display:flex;flex-direction:column}.advisor-container{max-width:980px}.header{text-align:center;margin-bottom:1.5rem;padding-top:.5rem}.header h1{font-size:2rem;font-weight:700;color:var(--color-primary);letter-spacing:-.02em;margin-bottom:.25rem}.subtitle{color:var(--color-text-muted);font-size:1rem;max-width:540px;margin:0 auto}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:1.25rem;margin-bottom:1rem;box-shadow:var(--shadow);animation:fadeInUp 0.4s ease}.card-title-sm{font-size:.9rem;font-weight:600;color:var(--color-primary);margin-bottom:.75rem}.card-header{font-size:.9rem;font-weight:600;color:var(--color-primary);padding:.75rem 1rem;margin:0;border-bottom:1px solid var(--color-border);display:flex;align-items:center;gap:.5rem}.card-body{padding:.75rem 1rem 1rem 1rem}.footer{margin-top:auto;text-align:center;padding:1.5rem 0 .5rem;color:var(--color-text-dim);font-size:.85rem}.footer p{display:flex;align-items:center;justify-content:center;gap:.3rem;flex-wrap:wrap}.footer-lang-bar{margin-top:.75rem}.footer-about-link{color:var(--color-text-muted);text-decoration:none;cursor:pointer;transition:color var(--transition);font-weight:500}.footer-about-link:hover{color:var(--color-primary)}.footer-about-link:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;border-radius:2px}.toolbar{padding:.75rem 1rem}.toolbar-row{display:flex;flex-wrap:wrap;align-items:center;gap:.75rem;margin-bottom:.5rem}.toolbar-row:last-child{margin-bottom:0}.toolbar-group{display:flex;align-items:center;gap:.35rem;flex-wrap:wrap}.toolbar-label{font-size:.8rem;color:var(--color-text-muted);font-weight:500;margin-right:.25rem}.toolbar-hint{font-size:.75rem;color:var(--color-text-dim)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.5rem .9rem;border:1px solid var(--color-border);border-radius:var(--radius-sm);font-size:.85rem;font-weight:500;cursor:pointer;transition:all var(--transition);font-family:var(--font);line-height:1.2;background:var(--color-surface-2);color:var(--color-text);text-decoration:none}.btn:hover:not(:disabled){border-color:var(--color-primary);color:var(--color-primary)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-icon{padding:.4rem .7rem;font-size:.8rem;white-space:nowrap}.btn-small{padding:.3rem .7rem;font-size:.8rem}.btn-small.active{background:var(--color-primary);color:var(--color-bg);border-color:var(--color-primary)}.btn-primary{background:var(--color-primary);color:var(--color-bg);border-color:var(--color-primary);font-weight:600;padding:.5rem 1.5rem}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover);border-color:var(--color-primary-hover);transform:translateY(-1px);box-shadow:0 4px 16px rgb(226 183 20 / .3)}.btn-primary.active{background:#fff0;color:var(--color-primary);border-color:var(--color-primary);box-shadow:0 0 12px rgb(226 183 20 / .25)}.btn-primary.active:hover:not(:disabled){background:rgb(226 183 20 / .1);color:var(--color-primary-hover)}.btn-toggle{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;box-sizing:border-box;padding:0;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface-2);cursor:pointer;transition:all var(--transition);font-size:.9rem;line-height:1}.btn-toggle:hover{border-color:var(--color-primary);background:rgb(226 183 20 / .1)}.btn-toggle.active{border-color:var(--color-primary);background:var(--color-primary);box-shadow:0 0 8px rgb(226 183 20 / .45)}.btn-toggle.active:hover{background:var(--color-primary-hover)}.btn-toggle.active .toggle-indicator{color:var(--color-bg)}.toggle-indicator{display:inline-block;font-size:.9rem;line-height:1;color:inherit}.piece-btn{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border:2px solid var(--color-border);border-radius:6px;background:var(--color-surface-2);cursor:pointer;transition:all var(--transition);padding:0}.piece-btn:hover{border-color:var(--color-primary);background:rgb(226 183 20 / .1)}.piece-btn.active{border-color:var(--color-primary);background:rgb(226 183 20 / .2);box-shadow:0 0 10px rgb(226 183 20 / .3)}.piece-icon{font-size:20px;line-height:1}.piece-icon-img{width:26px;height:26px;object-fit:contain;pointer-events:none}.white-piece{color:#fff;filter:drop-shadow(0 0 2px rgb(0 0 0 / .5))}.black-piece{color:#555;filter:drop-shadow(0 0 1px rgb(255 255 255 / .3))}.empty-icon{color:var(--color-text-dim);font-size:16px;font-weight:700}.toolbar-group-turn{gap:.25rem}.toolbar-group-nav{gap:.25rem}.toolbar-group-nav .btn-small{width:30px;height:30px;padding:0;display:inline-flex;align-items:center;justify-content:center}.toolbar-group-nav .btn-small:disabled{opacity:.3;cursor:not-allowed}.toolbar-group-nav .btn-small:disabled:hover{border-color:var(--color-border);color:var(--color-text);transform:none}.toolbar-group-engine{gap:.5rem}.toolbar-group-depth{gap:.5rem}.checkbox-label{display:inline-flex;align-items:center;gap:.2rem;font-size:.8rem;color:var(--color-text);cursor:pointer}.checkbox-label input[type="checkbox"]{accent-color:var(--color-primary);width:14px;height:14px}.control-row{display:flex;width:100%;align-items:center;justify-content:space-between;gap:.5rem}.control-row-label{font-size:.8rem;color:var(--color-text-muted);font-weight:500}.control-row .btn-toggle{flex:0 0 auto;width:72px;height:18px;box-sizing:border-box;padding:.1rem .6rem;font-size:.7rem;gap:.2rem;white-space:nowrap;overflow:hidden;transition:opacity var(--transition),width var(--transition),padding var(--transition),margin var(--transition),transform var(--transition)}.control-row .btn-toggle .toggle-indicator{font-size:.7rem}.control-row .btn-toggle.hiding{opacity:0;width:0;padding-left:0;padding-right:0;border-width:0;transform:scale(.85);pointer-events:none}.nav-group{display:flex;width:100%;gap:.25rem;align-items:center}.nav-group .btn-small{flex:1;height:36px;box-sizing:border-box;text-align:center;white-space:nowrap;display:inline-flex;align-items:center;justify-content:center;gap:.25rem;padding:.3rem .7rem;font-size:.8rem}.action-group{display:flex;width:100%;gap:.25rem}.action-group .btn-small{flex:1;height:36px;box-sizing:border-box;text-align:center;white-space:nowrap;display:inline-flex;align-items:center;justify-content:center;gap:.3rem;font-size:.78rem}.lang-bar{display:flex;align-items:center;justify-content:center;gap:.5rem;font-size:.85rem;color:var(--color-text-muted)}.lang-label{font-size:.75rem;font-weight:500;color:var(--color-text-dim)}.lang-switcher{display:flex;gap:.35rem}.lang-flag{width:18px;height:18px;border-radius:50%;display:block;transition:transform var(--transition),opacity var(--transition);opacity:.4}.lang-link{display:inline-flex;align-items:center;padding:.15rem;border:none;border-radius:50%;background:#fff0;text-decoration:none;transition:all var(--transition);cursor:pointer}.lang-link:hover .lang-flag{opacity:.8;transform:scale(1.15)}.lang-link.active .lang-flag{opacity:1;transform:scale(1.05)}.turn-group{display:flex;width:100%;gap:.25rem;align-items:center}.turn-switch-btn{flex:1;display:inline-flex;align-items:center;justify-content:center;height:36px;box-sizing:border-box;border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:.4rem .5rem;font-size:.8rem;background:var(--color-surface-2);color:var(--color-text-muted);cursor:pointer;transition:all var(--transition);text-align:center}.turn-switch-btn[data-turn="w"]{background:var(--color-turn-white-bg);color:var(--color-turn-white-color)!important}.turn-switch-btn[data-turn="b"]{background:var(--color-turn-black-bg);color:var(--color-turn-black-color)!important}.turn-switch-btn.active{box-shadow:inset 0 0 0 3px var(--color-primary);font-weight:600}.turn-switch-btn:hover:not(.active):not(:disabled){background:var(--color-turn-hover);color:var(--color-text)}.turn-switch-btn:disabled{opacity:1;cursor:not-allowed}.hints-card{padding:.6rem 1rem;text-align:center}.hints-card p{font-size:.8rem;color:var(--color-text-dim)}.hints-card kbd{background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:4px;padding:.1rem .4rem;font-family:inherit;font-size:.78rem;color:var(--color-text-muted)}.pos-row{margin-bottom:.5rem;width:100%}.pos-row:last-child{margin-bottom:0}.pos-section-divider{margin-top:.8rem;padding-top:.8rem;border-top:1px solid var(--color-border)}.board-layout{display:flex;gap:1rem;align-items:flex-start;justify-content:center}.board-wrapper{flex:0 0 auto;display:inline-flex;flex-direction:column;align-items:center;gap:3px;padding:.75rem;min-width:0}.board-area{display:flex;flex-direction:row;align-items:stretch;gap:0;min-width:0}.board-col{display:flex;flex-direction:column;align-items:stretch;gap:0;min-width:0}.board-coord{display:flex;flex-shrink:0}.coord-left,.coord-right{flex-direction:column;width:18px;margin-top:20px}.coord-top,.coord-bottom{flex-direction:row;height:18px}.coord-left .coord-label,.coord-right .coord-label{width:18px;height:var(--cell-size,64px);display:flex;align-items:center;justify-content:center;font-size:.65rem;font-weight:600;color:var(--color-text-dim);flex-shrink:0}.coord-top .coord-label,.coord-bottom .coord-label{width:var(--cell-size,64px);height:18px;display:flex;align-items:center;justify-content:center;font-size:.65rem;font-weight:600;color:var(--color-text-dim);flex-shrink:0}.board{display:grid;grid-template-columns:repeat(8,var(--cell-size,64px));grid-template-rows:repeat(8,var(--cell-size,64px));border:2px solid var(--color-border);border-radius:4px;overflow:hidden;touch-action:none}.cell{display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background 0.15s;user-select:none}.cell.light{background:var(--board-light)}.cell.dark{background:var(--board-dark)}.cell:hover{filter:brightness(1.1)}.cell.drag-over{outline:3px solid var(--color-primary);outline-offset:-3px;z-index:2}.cell.from-highlight{box-shadow:inset 0 0 10px 5px #1417e2}.cell.to-highlight{box-shadow:inset 0 0 12px 7px #4ade80}.cell.from-highlight .piece,.cell.to-highlight .piece{filter:brightness(1.2)}.cell.low-confidence{outline:3px solid #ff33334d!important;outline-offset:-3px;z-index:2;box-shadow:inset 0 0 7px 5px rgb(255 51 51 / .5)}.cell.low-confidence .piece{filter:brightness(1.1)}.cell.king-in-check{box-shadow:inset 0 0 12px 6px rgb(220 38 38 / .85);z-index:2}.cell.legal-move{position:relative}.cell.legal-move::after{content:'';position:absolute;width:26%;height:26%;border-radius:50%;background:rgb(0 0 0 / .25);pointer-events:none;z-index:3}.cell.legal-move.cell-capture::after{width:80%;height:80%;background:#fff0;border:4px solid rgb(0 0 0 / .25);border-radius:50%}.piece{width:90%;height:90%;max-width:100px;max-height:100px;object-fit:contain;cursor:grab;transition:transform 0.15s,filter 0.15s;z-index:1;pointer-events:auto;user-select:none;-webkit-user-drag:element;touch-action:none;-webkit-touch-callout:none}.piece:hover{transform:scale(1.1)}.piece:active{cursor:grabbing}.piece.dragging{opacity:.5;transform:scale(.9)}.piece.white{filter:var(--color-piece-white-filter)}.piece.black{filter:var(--color-piece-black-filter)}.piece.piece-no-moves{cursor:default}.piece.piece-no-moves:hover{transform:none}.arrow-overlay{pointer-events:none}.piece-strip{display:flex;width:calc(8 * var(--cell-size, 64px) + 36px);height:var(--strip-height,48px);align-items:center;justify-content:center;gap:2px;padding:2px;border:1px solid var(--color-border);border-radius:6px;margin:4px 0;box-sizing:content-box;--strip-height:48px}.piece-strip-top,.piece-strip-bottom{background:var(--color-piece-strip-bg);border-color:var(--color-piece-strip-border)}.piece-strip-btn{display:inline-flex;align-items:center;justify-content:center;width:calc(var(--strip-height, 48px) - 8px);height:calc(var(--strip-height, 48px) - 8px);border:2px solid #fff0;border-radius:6px;background:#fff0;cursor:pointer;transition:all 0.15s ease;padding:2px}.piece-strip-btn:hover{border-color:var(--color-primary);background:rgb(226 183 20 / .1)}.piece-strip-btn.active{border-color:var(--color-primary);background:rgb(226 183 20 / .2);box-shadow:0 0 8px rgb(226 183 20 / .3)}.piece-strip-btn img{width:80%;height:80%;object-fit:contain;pointer-events:none;user-select:none}.piece-strip-btn.empty-btn{border-color:#fff0;opacity:.6}.piece-strip-btn.empty-btn:hover{opacity:1;border-color:var(--color-text-dim)}.piece-strip-btn.empty-btn.active{border-color:var(--color-primary);opacity:1;box-shadow:0 0 8px rgb(226 183 20 / .3)}.piece-strip-btn .empty-icon{font-size:16px;color:var(--color-text-dim)}.piece-strip-btn.active .empty-icon{color:var(--color-primary)}.piece-strip-btn.castle-btn{border:none;width:auto;min-width:30px;height:calc(var(--strip-height, 48px) - 8px);padding:0 4px;font-size:10px;font-weight:600;white-space:nowrap;line-height:1;color:var(--color-text-dim);background:#fff0;cursor:pointer;transition:background var(--transition),color var(--transition);border-radius:6px}.piece-strip-btn.castle-btn:hover:not(.disabled){background:rgb(226 183 20 / .1)}.piece-strip-btn.castle-btn.active{color:var(--color-primary);background:#fff0;border:none;box-shadow:none;font-weight:900}.piece-strip-btn.castle-btn.disabled{opacity:.25;cursor:not-allowed;color:var(--color-text-dim)}.piece-strip-btn.castle-btn.disabled:hover{background:#fff0;color:var(--color-text-dim);opacity:.25}.piece-strip-btn.king-disabled{opacity:.35;cursor:not-allowed;filter:grayscale(.7)}.piece-strip-btn.king-disabled:hover{border-color:#fff0;background:#fff0}.strip-fill{flex:1;min-width:2px}.castle-icon{font-size:.7rem;color:var(--color-text-muted)}.drag-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:var(--color-drag-overlay-bg);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:99999;display:none;align-items:center;justify-content:center;pointer-events:none;transition:opacity 0.2s ease}.drag-overlay.active{display:flex}.drag-overlay-content{display:flex;flex-direction:column;align-items:center;gap:1rem;padding:2.5rem 3rem;border:2px dashed var(--color-primary);border-radius:var(--radius-lg);background:rgb(226 183 20 / .08);color:var(--color-primary)}.drag-overlay-icon{opacity:.8}.drag-overlay-text{font-size:1.1rem;font-weight:600;color:var(--color-primary);text-align:center}.side-panel{flex:1;min-width:260px;max-width:340px}.side-panel .card{padding:0}.fen-display{display:flex;align-items:center;gap:0;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:0;overflow:hidden}.fen-label{font-size:.65rem;font-weight:700;color:var(--color-text-dim);text-transform:uppercase;letter-spacing:.06em;padding:.4rem .5rem;background:var(--color-surface-2);flex-shrink:0;user-select:none;border-right:1px solid var(--color-border);line-height:1.3;align-self:stretch;display:flex;align-items:center}.fen-input{flex:1;font-family:'Consolas','Courier New',monospace;font-size:.78rem;color:var(--color-primary);word-break:break-all;line-height:1.4;background:#fff0;border:none;outline:none;padding:.5rem .5rem;margin:0;min-width:0;transition:color var(--transition),background var(--transition)}.fen-input:focus{color:var(--color-primary-hover)}.fen-input.fen-input-error{color:var(--color-error)!important;background:rgb(248 113 113 / .08)}.btn-copy{display:flex;align-items:center;justify-content:center;background:var(--color-surface-2);border:none;border-left:1px solid var(--color-border);color:var(--color-text-muted);padding:0 .5rem;cursor:pointer;transition:all var(--transition);flex-shrink:0;align-self:stretch;min-height:100%;box-sizing:border-box}.btn-copy:hover{color:var(--color-primary);background:rgb(226 183 20 / .1)}.btn-copy.copied{color:var(--color-success);background:rgb(74 222 128 / .1)}.upload-hints{margin-top:.5rem;text-align:center}.upload-hint-text{font-size:.7rem;color:var(--color-text-muted);margin-bottom:.15rem}.upload-hint-link{font-size:.72rem;color:var(--color-text-dim);font-family:'Consolas',monospace}.upload-spinner{display:none;flex-direction:column;align-items:center;justify-content:center;padding:1.5rem;gap:.75rem;animation:fadeInUp 0.2s ease}.upload-spinner-icon{width:36px;height:36px;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin 0.8s linear infinite}.upload-spinner p{color:var(--color-text-muted);font-size:.85rem;margin:0}.recognize-result{margin-top:.5rem;padding:.75rem 1rem;border-radius:var(--radius-sm);background:rgb(74 222 128 / .1);border:1px solid rgb(74 222 128 / .3);color:var(--color-success);font-size:.9rem;display:flex;flex-direction:column;align-items:center;gap:.5rem;animation:fadeInUp 0.2s ease}.recognize-result #recognizeResultText{font-weight:600}.btn-invert-result{white-space:nowrap;background:var(--color-surface-2);border:1px solid var(--color-border);color:var(--color-text);padding:.4rem .8rem;border-radius:var(--radius-sm);font-size:.8rem;cursor:pointer;transition:all var(--transition);display:inline-flex;align-items:center;gap:.35rem}.btn-invert-result:hover{border-color:var(--color-primary);color:var(--color-primary);background:rgb(226 183 20 / .1)}.status-msg{margin-top:.5rem;padding:.4rem .75rem;border-radius:var(--radius-sm);font-size:.8rem;text-align:center;animation:fadeInUp 0.2s ease}.status-success{background:rgb(74 222 128 / .1);border:1px solid rgb(74 222 128 / .3);color:var(--color-success)}.status-error{background:var(--color-error-bg);border:1px solid rgb(248 113 113 / .3);color:var(--color-error)}.screenshot-link{color:var(--color-text-muted);text-decoration:underline;cursor:pointer;transition:color var(--transition)}.screenshot-link:hover{color:var(--color-text-dim)}.screenshot-link:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;border-radius:2px}.hotkey-highlight{color:var(--color-primary)}.spinner-card{text-align:center;padding:1.5rem}.spinner{width:32px;height:32px;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin 0.8s linear infinite;margin:0 auto .75rem auto}.spinner-card p{color:var(--color-text-muted);font-size:.85rem}.mini-spinner{display:inline-flex;align-items:center;vertical-align:middle;margin-left:.5rem}.mini-spinner-icon{display:inline-block;width:14px;height:14px;border:2px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin 0.8s linear infinite}.toast-error{position:fixed;top:1.5rem;left:50%;transform:translateX(-50%) translateY(-20px);background:var(--color-error);color:#fff;padding:.75rem 1.5rem;border-radius:var(--radius);font-size:.9rem;font-weight:500;box-shadow:0 4px 20px rgb(248 113 113 / .4);opacity:0;transition:all 0.3s ease;z-index:1000;max-width:90vw;text-align:center}.toast-error.show{opacity:1;transform:translateX(-50%) translateY(0)}.advice-card{border-color:rgb(226 183 20 / .2)}.advice-result{padding:.5rem 0}.advice-move{display:flex;align-items:center;gap:.75rem;margin-bottom:.5rem}.advice-arrow{font-size:1.2rem;font-weight:700;font-family:'Consolas',monospace;color:var(--color-primary);background:var(--color-bg);padding:.3rem .7rem;border-radius:var(--radius-sm);letter-spacing:.1em}.capture-badge{font-size:.7rem;font-weight:600;padding:.15rem .5rem;border-radius:4px;background:rgb(248 113 113 / .2);color:var(--color-error)}.advice-eval{font-size:.9rem;margin-bottom:.3rem}.advice-meta{font-size:.75rem;color:var(--color-text-dim);margin-bottom:.3rem}.eval-good{color:var(--color-success);font-weight:600}.equal{color:var(--color-warning);font-weight:600;background:var(--color-eval-equal-bg)}.eval-bad{color:var(--color-error);font-weight:600}.eval-mate{color:var(--color-error);font-weight:700}.eval-white-adv{color:#fff;background:var(--color-eval-white-adv-bg)}.eval-black-adv{color:#222;background:var(--color-eval-black-adv-bg);font-weight:900}.eval-white-adv,.eval-black-adv,.equal{display:inline-block;padding:0rem .2rem;border-radius:10px;font-weight:700}.pv-line{font-size:.8rem;color:var(--color-text-muted);background:var(--color-bg);padding:.3rem .6rem;border-radius:var(--radius-sm);margin-bottom:.5rem;font-family:'Consolas',monospace}.top-moves{margin-top:.5rem}.top-moves strong{font-size:.8rem;color:var(--color-text-muted)}.top-moves ol{margin:.3rem 0 0 1.2rem;font-size:.8rem}.top-moves li code{color:var(--color-text);font-family:'Consolas',monospace}.advice-result.mate,.advice-result.stalemate{text-align:center;padding:1rem}.advice-result.error{text-align:center;padding:.5rem;color:var(--color-error)}.advice-icon{font-size:1.5rem;display:block;margin-bottom:.5rem}.advice-text{font-size:1rem;font-weight:600}.mate-in-live{color:#e74c3c;font-weight:600}.advice-accordion{border-color:rgb(226 183 20 / .2);padding:0;overflow:hidden}.advice-summary{display:flex;align-items:center;gap:.5rem;padding:.75rem 1rem;cursor:pointer;user-select:none;font-size:.9rem;font-weight:600;color:var(--color-primary);list-style:none;transition:background var(--transition);margin:0;border-bottom:1px solid var(--color-border)}.advice-summary::-webkit-details-marker{display:none}.advice-summary::after{content:'▾';margin-left:auto;font-size:2rem;line-height:.6;color:var(--color-text-dim);transition:transform var(--transition)}.advice-accordion[open] .advice-summary::after{content:'▴'}.advice-summary:hover::after{color:var(--color-primary)}.advice-summary:hover{background:rgb(226 183 20 / .05)}.advice-accordion-body{padding:.75rem 1rem 1rem 1rem}.advice-result.multipv{display:flex;flex-direction:column;gap:.35rem}.advice-line{display:flex;align-items:center;gap:.4rem;padding:.35rem .5rem;border-radius:var(--radius-sm);background:var(--color-bg);border:1px solid #fff0;cursor:pointer;transition:all 0.15s ease}.advice-line:hover{border-color:var(--color-primary);background:rgb(226 183 20 / .05)}.advice-line-primary{border-color:rgb(226 183 20 / .3);background:rgb(226 183 20 / .08)}.line-num{font-size:.7rem;font-weight:700;color:var(--color-text-dim);min-width:1.2rem;text-align:right}.line-move{font-size:.9rem;font-weight:700;font-family:'Consolas',monospace;color:var(--color-primary);min-width:4.5rem}.line-eval{font-size:.85rem;font-weight:600;min-width:3.5rem}.pv-snippet{font-size:.72rem;color:var(--color-text-muted);font-family:'Consolas',monospace;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.advice-stats{display:flex;align-items:center;justify-content:space-between;gap:.5rem;margin-top:.25rem;padding-top:.25rem;border-top:1px solid var(--color-border)}.advice-stats-text{font-size:.72rem;color:var(--color-text-dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.advice-settings-btn{margin-left:0;flex-shrink:0}.advice-settings-btn.active{border-color:var(--color-primary);color:var(--color-primary);background:rgb(226 183 20 / .1)}.engine-source-label{font-size:.72rem;color:var(--color-text-muted);margin-bottom:.5rem;padding:.35rem .6rem;background:rgb(226 183 20 / .08);border-radius:var(--radius-sm);display:flex;align-items:center;gap:.4rem;flex-wrap:wrap;animation:fadeInUp 0.3s ease;line-height:1.4}.engine-loading-progress{display:flex;align-items:center;gap:.5rem;margin:0 0 .5rem 0}.engine-loading-progress-track{flex:1;height:6px;background:var(--color-border);border-radius:3px;overflow:hidden}.engine-loading-progress-fill{height:100%;width:0%;background:var(--color-primary);border-radius:3px;transition:width 0.15s ease-out}.engine-loading-progress-fill.indeterminate{width:35%!important;animation:engine-progress-indeterminate 1.2s ease-in-out infinite}.engine-loading-progress-text{font-size:.7rem;color:var(--color-text-muted);white-space:nowrap}@keyframes engine-progress-indeterminate{0%{margin-left:0%}50%{margin-left:65%}100%{margin-left:0%}}.engine-select{background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);font-family:var(--font);font-size:.8rem;padding:.3rem .5rem;cursor:pointer;transition:border-color var(--transition);max-width:130px}.engine-select:hover,.engine-select:focus{border-color:var(--color-primary);outline:none}.engine-select:disabled{opacity:.5;cursor:not-allowed}.engine-select option{background:var(--color-surface);color:var(--color-text)}.engine-status{font-size:.75rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:55%;flex-shrink:1;min-width:0;transition:opacity var(--transition)}.engine-status-loading{color:var(--color-warning)}.engine-status-ready{color:var(--color-success)}.engine-status-error{color:var(--color-error)}.engine-info{color:var(--color-text-muted)}.depth-range{-webkit-appearance:none;appearance:none;width:80px;height:4px;background:var(--color-border);border-radius:2px;outline:none;cursor:pointer;transition:background var(--transition)}.depth-range::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:14px;height:14px;border-radius:50%;background:var(--color-primary);cursor:pointer;border:2px solid var(--color-surface);transition:transform var(--transition)}.depth-range::-webkit-slider-thumb:hover{transform:scale(1.2)}.depth-range::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--color-primary);cursor:pointer;border:2px solid var(--color-surface)}.depth-range:disabled{opacity:.5;cursor:not-allowed}.depth-value{font-size:.8rem;font-weight:600;color:var(--color-primary);min-width:1.5rem;text-align:center;font-family:'Consolas',monospace}.engine-settings-body{display:none;flex-direction:column;gap:.5rem;padding:.5rem 0 .25rem 0;opacity:0;transform:translateY(-4px);transition:opacity var(--transition),transform var(--transition)}.engine-settings-body.visible{display:flex}.engine-settings-body.open{opacity:1;transform:translateY(0)}.setting-row{display:flex;align-items:center;gap:.5rem}.setting-row-header{justify-content:space-between}.setting-row-slider{display:flex;align-items:center;gap:.5rem}.setting-label{font-size:.78rem;color:var(--color-text-muted);display:flex;align-items:center;gap:.3rem;white-space:nowrap}.setting-hint{font-size:.7rem;color:var(--color-text-dim);white-space:nowrap}.setting-help-btn{display:inline-flex;align-items:center;justify-content:center;width:16px;height:16px;border:1px solid var(--color-text-dim);border-radius:50%;background:#fff0;color:var(--color-text-dim);font-size:.6rem;font-weight:700;cursor:pointer;transition:all var(--transition);padding:0;line-height:1;flex-shrink:0}.setting-help-btn:hover{border-color:var(--color-primary);color:var(--color-primary);background:rgb(226 183 20 / .1)}.setting-select{width:100%;background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);font-family:var(--font);font-size:.8rem;padding:.4rem .5rem;cursor:pointer;transition:border-color var(--transition)}.setting-select:hover,.setting-select:focus{border-color:var(--color-primary);outline:none}.setting-select option{background:var(--color-surface);color:var(--color-text)}.setting-slider{-webkit-appearance:none;appearance:none;flex:1;height:4px;background:var(--color-border);border-radius:2px;outline:none;cursor:pointer;transition:background var(--transition)}.setting-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:14px;height:14px;border-radius:50%;background:var(--color-primary);cursor:pointer;border:2px solid var(--color-surface);transition:transform var(--transition)}.setting-slider::-webkit-slider-thumb:hover{transform:scale(1.2)}.setting-slider::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--color-primary);cursor:pointer;border:2px solid var(--color-surface)}.setting-slider:disabled{opacity:.5;cursor:not-allowed}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgb(0 0 0 / .6);z-index:9999;display:flex;align-items:center;justify-content:center;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;padding:2rem 0;box-sizing:border-box;animation:fadeIn 0.2s ease}.modal-content{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);max-width:480px;width:90%;margin:auto 0;box-shadow:0 8px 40px rgb(0 0 0 / .5);animation:fadeInUp 0.2s ease}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;border-bottom:1px solid var(--color-border);font-weight:600;font-size:.95rem;color:var(--color-primary)}.modal-close{background:none;border:none;color:var(--color-text-muted);font-size:1.4rem;cursor:pointer;padding:0 .25rem;line-height:1;transition:color var(--transition)}.modal-close:hover{color:var(--color-primary)}.modal-body{padding:1rem 1.25rem}.modal-body ul{list-style:none;padding:0;margin:0}.modal-body li{padding:.35rem 0;font-size:.85rem;color:var(--color-text);line-height:1.5;padding-left:1.2rem;position:relative}.modal-body li::before{content:'•';position:absolute;left:0;color:var(--color-primary);font-weight:700}.modal-body li strong{color:var(--color-text-muted);font-weight:600}.help-section{margin-bottom:.75rem}.help-section:last-child{margin-bottom:0}.help-section-title{font-size:.9rem;font-weight:600;color:var(--color-primary);margin-bottom:.4rem;display:flex;align-items:center;gap:.3rem}.help-section-desc{font-size:.82rem;color:var(--color-text);margin-bottom:.5rem;line-height:1.5}.help-section .help-list{list-style:none;padding:0;margin:0}.help-section .help-list li{padding:.25rem 0;font-size:.82rem;color:var(--color-text);line-height:1.5;padding-left:1.2rem;position:relative}.help-section .help-list li::before{content:'•';position:absolute;left:0;color:var(--color-primary);font-weight:700}.help-section .help-list li strong{color:var(--color-text-muted);font-weight:600}.help-supported{font-size:.78rem;color:var(--color-text-muted);margin-top:.3rem}.help-engine-timeout{font-size:.72rem;color:var(--color-warning)}.help-divider{border:none;border-top:1px solid var(--color-border);margin:.75rem 0}.btn-help{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border:1px solid var(--color-text-dim);border-radius:50%;background:#fff0;color:var(--color-text-dim);font-size:.75rem;font-weight:700;cursor:pointer;transition:all var(--transition);margin-left:auto;padding:0;line-height:1;flex-shrink:0}.btn-help:hover{border-color:var(--color-primary);color:var(--color-primary);background:rgb(226 183 20 / .1)}.btn-design-settings{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;margin-left:auto;padding:0;border:1px solid var(--color-border);border-radius:6px;background:var(--color-surface);color:var(--color-text-muted);font-size:16px;cursor:pointer;transition:all var(--transition);flex-shrink:0}.btn-design-settings:hover{background:var(--color-surface-2);color:var(--color-text);border-color:var(--color-primary)}#designModal .modal-content{max-width:600px;width:90vw}#designModal .modal-body{padding:1.25rem}.design-section{margin-bottom:1.5rem}.design-section:last-child{margin-bottom:0}.design-section h4{margin:0 0 .75rem;font-size:.95rem;font-weight:600;color:var(--color-text)}.design-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem}.design-btn{display:flex;flex-direction:column;align-items:center;gap:.35rem;padding:.6rem .4rem;border:2px solid var(--color-border);border-radius:8px;background:var(--color-surface);cursor:pointer;transition:all var(--transition);text-align:center}.design-btn:hover{border-color:var(--color-primary);background:var(--color-surface-2)}.design-btn.active{border-color:var(--color-primary);background:rgb(226 183 20 / .1);box-shadow:0 0 0 2px rgb(226 183 20 / .3)}.design-preview-pieces{display:flex;align-items:center;justify-content:center;gap:.25rem;height:48px}.design-preview-piece{width:36px;height:36px;object-fit:contain;image-rendering:auto}.design-preview-board{display:flex;align-items:center;justify-content:center;gap:0;height:48px;border-radius:4px;overflow:hidden;border:1px solid var(--color-border)}.design-preview-square{display:block;width:28px;height:28px;flex-shrink:0}.design-btn-label{font-size:.7rem;font-weight:500;color:var(--color-text-muted);line-height:1.1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.design-btn-ui-theme{display:flex;flex-direction:column;align-items:center;gap:.35rem;padding:.75rem .4rem .6rem;border:2px solid var(--color-border);border-radius:8px;background:var(--color-surface);cursor:pointer;transition:all var(--transition);text-align:center}.design-btn-ui-theme:hover{border-color:var(--color-primary);background:var(--color-surface-2)}.design-btn-ui-theme.active{border-color:var(--color-primary);background:rgb(226 183 20 / .1);box-shadow:0 0 0 2px rgb(226 183 20 / .3)}.design-ui-theme-icon{display:block;transition:transform var(--transition)}.design-btn-ui-theme:hover .design-ui-theme-icon{transform:scale(1.15)}.upload-card{text-align:center}.file-input-area{border:2px dashed var(--color-border);border-radius:var(--radius);padding:2.5rem 1.5rem;cursor:pointer;transition:all var(--transition);background:var(--color-surface-2);position:relative}.file-input-area:hover{border-color:var(--color-primary);background:rgb(226 183 20 / .05)}.file-input-area.dragover{border-color:var(--color-primary);background:rgb(226 183 20 / .08);transform:scale(1.01)}.result-card h2{font-size:1.25rem;color:var(--color-primary);margin-bottom:1.5rem;text-align:center}.result-content{display:flex;flex-direction:column;gap:1.25rem}.result-label{display:block;color:var(--color-text-muted);font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.5rem}.fen-string-wrapper{display:flex;align-items:center;gap:.75rem;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:.75rem 1rem}.fen-string{flex:1;font-family:'Consolas','Courier New',monospace;font-size:.95rem;color:var(--color-primary);word-break:break-all;user-select:all}.confidence-bar-wrapper{display:flex;align-items:center;gap:.75rem}.confidence-bar{flex:1;height:8px;background:var(--color-bg);border-radius:4px;overflow:hidden}.confidence-fill{height:100%;background:linear-gradient(90deg,var(--color-primary),var(--color-primary-hover));border-radius:4px;transition:width 0.6s ease}.confidence-value{color:var(--color-primary);font-weight:700;font-size:.9rem;min-width:3rem;text-align:right}@media (max-width:800px){.piece-strip{--strip-height:38px}.piece-strip-btn{width:calc(var(--strip-height, 38px) - 6px);height:calc(var(--strip-height, 38px) - 6px)}}@media (max-width:500px){.piece-strip{--strip-height:32px;width:calc(8 * var(--cell-size, 40px));margin:2px 0;padding:2px 0}.piece-strip-btn{width:calc(var(--strip-height, 32px) - 6px);height:calc(var(--strip-height, 32px) - 6px)}}@media (max-width:980px) and (min-width:801px){.action-group .btn-small .btn-text,.nav-group .btn-small .btn-text{display:none}.action-group .btn-small,.nav-group .btn-small{gap:0;font-size:0;padding:.3rem .4rem}.action-group .btn-small svg,.nav-group .btn-small svg{width:16px;height:16px}}@media (max-width:800px){.board-layout{flex-direction:column;align-items:center}.side-panel{max-width:100%;width:100%}.board-wrapper{width:100%;justify-content:center;align-items:center}.board-wrapper .board-area{width:auto}.toolbar-row{gap:.5rem}.piece-btn{width:28px;height:28px}.piece-icon{font-size:16px}.piece-icon-img{width:22px;height:22px}}@media (max-width:500px){.board-coord,.coord-left,.coord-right,.coord-top,.coord-bottom{display:none!important}.board-wrapper{padding:4px!important}.container{padding:.5rem 0.5rem!important}.board-layout{gap:.5rem}.header{margin-bottom:.5rem}.header h1{font-size:1.1rem}.subtitle{font-size:.8rem}.toolbar{padding:.4rem .5rem}.hints-card{display:none}.action-group .btn-small .btn-text,.nav-group .btn-small .btn-text{display:none}.action-group .btn-small,.nav-group .btn-small{gap:0;font-size:0;padding:.3rem .4rem}.action-group .btn-small svg,.nav-group .btn-small svg{width:16px;height:16px}}@media (max-width:480px){.design-grid{grid-template-columns:repeat(2,1fr)}#designModal .modal-content{max-width:95vw}}