@import"https://fonts.googleapis.com/css2?family=Ma+Shan+Zheng&family=Outfit:wght@300;400;500;600;700&family=Playfair+Display:wght@400;500;600;700&display=swap";:root{--font-display: "Playfair Display", Georgia, serif;--font-body: "Outfit", -apple-system, BlinkMacSystemFont, sans-serif;--bg-deep: #0c0a08;--bg-primary: #161310;--bg-secondary: #1e1a16;--bg-tertiary: #2a2520;--bg-elevated: #322c26;--text-primary: #f8f5ef;--text-secondary: #c4b8a5;--text-tertiary: #8a7d6a;--text-muted: #5c5246;--accent-gold: #d4a574;--accent-gold-light: #e8c49a;--accent-gold-bright: #f0d4aa;--accent-gold-dark: #b8895a;--accent-gold-deep: #9a7048;--color-black-stone: #1a1a1a;--color-white-stone: #f5f5f0;--color-board: #dcb35c;--color-grid: #8b7355;--color-error: #e85d5d;--color-success: #5dba7d;--color-warning: #e8a85d;--border-subtle: rgba(212, 165, 116, .12);--border-medium: rgba(212, 165, 116, .25);--border-strong: rgba(212, 165, 116, .4);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5);--shadow-glow: 0 0 20px rgba(212, 165, 116, .15);--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--ease-out: cubic-bezier(.4, 0, .2, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--duration-fast: .15s;--duration-normal: .25s;--duration-slow: .4s;font-family:var(--font-body);line-height:1.6;font-weight:400;color-scheme:dark;color:var(--text-primary);background:var(--bg-deep);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}body{min-height:100vh;background:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E"),linear-gradient(145deg,var(--bg-primary) 0%,var(--bg-deep) 50%,#080604 100%);background-blend-mode:overlay,normal}#root{width:100%;min-height:100vh}h1,h2,h3,h4,h5,h6{font-family:var(--font-body);font-weight:600;letter-spacing:-.01em;line-height:1.2}.display-text{font-family:var(--font-display);font-weight:500}button{font-family:var(--font-body);font-size:14px;font-weight:500;padding:10px 20px;border-radius:var(--radius-md);border:1px solid var(--border-medium);background:#d4a57414;color:var(--text-primary);cursor:pointer;transition:all var(--duration-normal) var(--ease-out);letter-spacing:.02em;position:relative;overflow:hidden}button:hover{background:#d4a57426;border-color:var(--border-strong);transform:translateY(-1px)}button:active{transform:translateY(0)}button:focus-visible{outline:2px solid var(--accent-gold);outline-offset:2px}button:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-primary{background:linear-gradient(135deg,var(--accent-gold) 0%,var(--accent-gold-dark) 100%);color:var(--bg-deep);border:none;font-weight:600;box-shadow:var(--shadow-md),0 0 0 1px #d4a5744d}.btn-primary:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s var(--ease-out)}.btn-primary:hover{background:linear-gradient(135deg,var(--accent-gold-light) 0%,var(--accent-gold) 100%);box-shadow:var(--shadow-lg),var(--shadow-glow);transform:translateY(-2px)}.btn-primary:hover:before{left:100%}.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-sm)}.btn-secondary{background:transparent;color:var(--text-secondary);border:1px solid var(--border-medium)}.btn-secondary:hover{color:var(--text-primary);background:#d4a5741a;border-color:var(--border-strong)}.btn-ghost{background:transparent;border:none;color:var(--text-secondary);padding:8px 16px}.btn-ghost:hover{color:var(--text-primary);background:#ffffff0d}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb{background:var(--accent-gold-deep);border-radius:var(--radius-full);border:2px solid var(--bg-secondary)}::-webkit-scrollbar-thumb:hover{background:var(--accent-gold-dark)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.6}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes glow{0%,to{box-shadow:0 0 20px #d4a5744d}50%{box-shadow:0 0 40px #d4a57480}}.animate-fade-in{animation:fadeIn .4s var(--ease-out)}.animate-fade-in-up{animation:fadeInUp .5s var(--ease-out)}.animate-fade-in-down{animation:fadeInDown .5s var(--ease-out)}.animate-slide-in-left{animation:slideInLeft .5s var(--ease-out)}.animate-slide-in-right{animation:slideInRight .5s var(--ease-out)}.animate-scale-in{animation:scaleIn .3s var(--ease-spring)}.delay-1{animation-delay:.1s;animation-fill-mode:both}.delay-2{animation-delay:.2s;animation-fill-mode:both}.delay-3{animation-delay:.3s;animation-fill-mode:both}.delay-4{animation-delay:.4s;animation-fill-mode:both}.glass{background:#161310cc;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-subtle)}.spinner{width:40px;height:40px;border:3px solid var(--border-subtle);border-top-color:var(--accent-gold);border-radius:50%;animation:spin .8s linear infinite}.focus-ring:focus-visible{outline:2px solid var(--accent-gold);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.app{position:fixed;inset:0;display:flex;flex-direction:column;overflow:hidden;background:var(--bg-primary)}.app-content{flex:1;min-height:0;position:relative;overflow:hidden}.board-size-selector{display:flex;justify-content:center}.size-toggle{display:flex;background:#0c0a08d9;border-radius:var(--radius-lg);padding:4px;gap:2px;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-subtle);box-shadow:var(--shadow-md)}.toggle-option{position:relative;padding:10px 20px;font-size:14px;font-weight:600;font-family:var(--font-body);background:transparent;color:var(--text-tertiary);border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--duration-normal) var(--ease-out);white-space:nowrap;letter-spacing:.02em}.toggle-option:hover:not(.active){color:var(--text-secondary);background:#ffffff0d}.toggle-option.active{background:linear-gradient(135deg,var(--accent-gold) 0%,var(--accent-gold-dark) 100%);color:var(--bg-deep);box-shadow:0 2px 8px #d4a5744d,inset 0 1px #ffffff26}.toggle-option.active:after{content:"";position:absolute;bottom:-6px;left:50%;transform:translate(-50%);width:4px;height:4px;background:var(--accent-gold);border-radius:50%;opacity:.8}.toggle-option span{display:inline-flex;align-items:center;gap:1px}@media(max-width:768px){.size-toggle{padding:3px}.toggle-option{padding:8px 14px;font-size:13px}}@media(max-width:400px){.toggle-option{padding:7px 12px;font-size:12px}}.camera-view{position:absolute;inset:0;background:var(--bg-deep);display:flex;flex-direction:column;overflow:hidden}.camera-video{width:100%;height:100%;object-fit:cover}.camera-video::-webkit-media-controls{display:none!important}.camera-video::-webkit-media-controls-play-button{display:none!important}.camera-video::-webkit-media-controls-start-playback-button{display:none!important}.camera-overlay{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:5}.guide-rect{fill:none;stroke:var(--accent-gold);stroke-width:1px;stroke-dasharray:8px 6px;opacity:.4}.guide-corner-glow{stroke:var(--accent-gold);stroke-width:6px;stroke-linecap:round;stroke-linejoin:round;opacity:.15;filter:blur(2px)}.guide-corner{stroke:var(--accent-gold);stroke-width:1.5px;stroke-linecap:round;stroke-linejoin:round;opacity:.8}.guide-darkening rect{fill:#0009}.guide-text{fill:var(--text-primary);font-family:var(--font-body);font-size:14px;font-weight:500;text-shadow:0 2px 8px rgba(0,0,0,.8);letter-spacing:.05em}.board-size-wrapper{display:flex;justify-content:center;margin-bottom:var(--space-md);animation:fadeInDown .5s var(--ease-out) .2s both}@media(max-width:768px){.board-size-wrapper{margin-bottom:16px}}.camera-controls{position:absolute;bottom:0;left:0;right:0;z-index:15;display:flex;flex-direction:column;align-items:center;gap:var(--space-md);padding:var(--space-xl) var(--space-lg);padding-bottom:max(var(--space-xl),env(safe-area-inset-bottom,24px));background:linear-gradient(0deg,rgba(12,10,8,.98) 0%,rgba(12,10,8,.8) 60%,transparent 100%);animation:fadeInUp .6s var(--ease-out) .1s both}.controls-row{display:flex;gap:var(--space-md);width:100%;max-width:420px}.capture-button{flex:1;min-height:56px;padding:var(--space-md) var(--space-xl);font-size:16px;font-weight:600;background:linear-gradient(135deg,var(--accent-gold) 0%,var(--accent-gold-dark) 100%);color:var(--bg-deep);border:none;border-radius:var(--radius-full);cursor:pointer;transition:all var(--duration-normal) var(--ease-out);box-shadow:var(--shadow-lg),0 0 0 1px #d4a5744d,inset 0 1px #fff3;letter-spacing:.03em;text-transform:uppercase;position:relative;overflow:hidden}.capture-button:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);transform:translate(-100%);transition:transform .6s var(--ease-out)}.capture-button:hover:not(:disabled){background:linear-gradient(135deg,var(--accent-gold-light) 0%,var(--accent-gold) 100%);transform:translateY(-2px);box-shadow:var(--shadow-lg),var(--shadow-glow),0 0 0 1px #d4a57480}.capture-button:hover:not(:disabled):before{transform:translate(100%)}.capture-button:active:not(:disabled){transform:translateY(0) scale(.98)}.capture-button:disabled{opacity:.5;cursor:not-allowed}.upload-button{flex:1;min-height:56px;padding:var(--space-md) var(--space-xl);font-size:15px;font-weight:500;background:#ffffff0f;color:var(--text-primary);border:1px solid rgba(255,255,255,.15);border-radius:var(--radius-full);cursor:pointer;transition:all var(--duration-normal) var(--ease-out);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);letter-spacing:.02em}.upload-button:hover{background:#ffffff1f;border-color:#ffffff4d;transform:translateY(-1px)}.upload-button:active{transform:translateY(0)}.camera-error{position:absolute;inset:0;background:var(--bg-deep);display:flex;align-items:center;justify-content:center;padding:var(--space-xl)}.error-content{text-align:center;max-width:400px;animation:scaleIn .4s var(--ease-spring)}.error-icon{width:64px;height:64px;margin:0 auto var(--space-lg);background:#e85d5d1a;border:2px solid rgba(232,93,93,.3);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:28px}.error-content h2{color:var(--color-error);font-size:20px;font-weight:600;margin-bottom:var(--space-sm)}.error-content p{color:var(--text-secondary);font-size:15px;line-height:1.6;margin-bottom:var(--space-lg)}.error-buttons{display:flex;gap:var(--space-md);justify-content:center;width:100%;max-width:420px}.retry-button{flex:1;min-height:52px;padding:14px 28px;font-size:15px;font-weight:600;background:linear-gradient(135deg,var(--accent-gold) 0%,var(--accent-gold-dark) 100%);color:var(--bg-deep);border:none;border-radius:var(--radius-lg);cursor:pointer;transition:all var(--duration-normal) var(--ease-out);box-shadow:var(--shadow-md);white-space:nowrap}.retry-button:hover{background:linear-gradient(135deg,var(--accent-gold-light) 0%,var(--accent-gold) 100%);transform:translateY(-2px);box-shadow:var(--shadow-lg),var(--shadow-glow)}.error-buttons .upload-button{flex:1;min-width:auto;min-height:52px;padding:14px 28px;border-radius:var(--radius-lg);white-space:nowrap}@media(max-width:768px){.camera-controls{padding:var(--space-lg);padding-bottom:max(var(--space-lg),env(safe-area-inset-bottom,20px))}.controls-row{gap:var(--space-sm)}.capture-button,.upload-button{min-height:52px;font-size:14px;padding:var(--space-md) var(--space-md)}.error-buttons{width:100%;max-width:420px}.retry-button,.error-buttons .upload-button{flex:1}}.image-adjustment{position:absolute;inset:0;background:var(--bg-deep);display:flex;flex-direction:column;overflow:hidden;animation:fadeIn .4s var(--ease-out);overscroll-behavior:none}.image-adjustment.is-dragging{touch-action:none;-webkit-user-select:none;user-select:none}.adjustment-header{display:flex;align-items:center;padding:var(--space-sm) var(--space-lg);background:var(--bg-primary);border-bottom:1px solid var(--border-subtle);gap:var(--space-md);z-index:10;animation:fadeInDown .5s var(--ease-out)}.adjustment-header h2{flex:1;text-align:center;font-size:16px;font-weight:600;color:var(--text-primary);letter-spacing:.02em;text-transform:uppercase;margin:0}.adjustment-header:after{content:"";width:80px}.help-link{display:flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);margin:var(--space-sm) auto 0 auto;max-width:400px;background:transparent;border:none;color:var(--accent-gold);font-size:13px;cursor:pointer;transition:all var(--duration-normal) var(--ease-out)}.help-link-icon{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:20px;height:20px;font-size:13px;font-weight:600;color:var(--accent-gold);border:1px solid var(--accent-gold);border-radius:50%;transition:all var(--duration-normal) var(--ease-out)}.image-adjustment .board-size-selector{padding:var(--space-sm) var(--space-md);background:var(--bg-secondary);border-bottom:1px solid var(--border-subtle);animation:fadeInDown .5s var(--ease-out) .1s both}.canvas-container{flex:1;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:var(--space-lg);min-height:0;background:radial-gradient(ellipse at center,var(--bg-secondary) 0%,var(--bg-deep) 100%);touch-action:none}.canvas-container>div{max-width:min(800px,90vw);max-height:min(600px,calc(100vh - 280px));animation:scaleIn .5s var(--ease-out) .2s both;display:grid;grid-template:1fr / 1fr;place-items:center}.canvas-container>div>*{grid-area:1 / 1}.canvas-container canvas{display:block;max-width:100%;max-height:min(600px,calc(100vh - 280px));width:auto;height:auto;border-radius:var(--radius-sm);box-shadow:var(--shadow-lg)}.corners-overlay{width:100%;height:100%;pointer-events:none;z-index:10;overflow:visible;touch-action:none}.corner-handle-touch{pointer-events:all;cursor:grab;touch-action:none;-webkit-tap-highlight-color:transparent}.corner-handle-touch:active{cursor:grabbing}.corner-handle-visual{pointer-events:none;filter:drop-shadow(0 2px 4px rgba(0,0,0,.5))}.adjustment-controls{padding:var(--space-md) var(--space-lg);background:var(--bg-primary);border-top:1px solid var(--border-subtle);display:flex;flex-direction:column;gap:var(--space-md);align-items:center;z-index:10;animation:fadeInUp .5s var(--ease-out) .3s both}.detect-button{flex:1;min-height:52px;padding:14px 24px;font-size:14px;font-weight:600;background:linear-gradient(135deg,var(--accent-gold) 0%,var(--accent-gold-dark) 100%);color:var(--bg-deep);border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--duration-normal) var(--ease-out);box-shadow:var(--shadow-md),0 0 0 1px #d4a5744d;letter-spacing:.03em;text-transform:uppercase;position:relative;overflow:hidden}.detect-button:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);transform:translate(-100%);transition:transform .6s var(--ease-out)}.detect-button:hover:not(:disabled){background:linear-gradient(135deg,var(--accent-gold-light) 0%,var(--accent-gold) 100%);transform:translateY(-2px);box-shadow:var(--shadow-lg),var(--shadow-glow)}.detect-button:hover:not(:disabled):before{transform:translate(100%)}.detect-button:active:not(:disabled){transform:translateY(0) scale(.98)}.detect-button:disabled{opacity:.6;cursor:not-allowed}.error-message{color:var(--color-error);font-size:14px;font-weight:500;text-align:center;padding:var(--space-sm) var(--space-md);background:#e85d5d1a;border-radius:var(--radius-md);border:1px solid rgba(232,93,93,.2)}.status-message{color:var(--color-warning);font-size:14px;font-weight:500;text-align:center;padding:var(--space-sm) var(--space-md);background:#e8a85d1a;border-radius:var(--radius-md);border:1px solid rgba(232,168,93,.2)}.help-text{color:var(--text-tertiary);font-size:13px;text-align:center;letter-spacing:.02em}.adjustment-error{position:absolute;inset:0;background:var(--bg-deep);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-lg);color:var(--text-primary);padding:var(--space-xl)}.adjustment-error p{color:var(--text-secondary);font-size:16px}.adjustment-error button{padding:14px 28px;font-size:15px;font-weight:600;background:linear-gradient(135deg,var(--accent-gold) 0%,var(--accent-gold-dark) 100%);color:var(--bg-deep);border:none;border-radius:var(--radius-lg);cursor:pointer;transition:all var(--duration-normal) var(--ease-out);box-shadow:var(--shadow-md)}.adjustment-error button:hover{background:linear-gradient(135deg,var(--accent-gold-light) 0%,var(--accent-gold) 100%);transform:translateY(-2px);box-shadow:var(--shadow-lg),var(--shadow-glow)}@media(max-width:768px){.adjustment-header{padding:var(--space-sm) var(--space-md)}.adjustment-header h2{font-size:14px}.adjustment-header:after{width:60px}.canvas-container{padding:var(--space-md)}.adjustment-controls{padding:var(--space-sm) var(--space-md)}.button-row{gap:var(--space-sm)}.secondary-button,.detect-button{padding:12px 16px;font-size:13px}}.help-modal-overlay{position:fixed;inset:0;background:#000000d9;display:flex;align-items:center;justify-content:center;z-index:1000;padding:var(--space-md);animation:fadeIn .2s var(--ease-out)}.help-modal{position:relative;background:var(--bg-primary);border-radius:var(--radius-lg);padding:var(--space-lg);max-width:min(90vw,600px);max-height:90vh;overflow:auto;box-shadow:var(--shadow-xl);animation:scaleIn .3s var(--ease-out);display:flex;flex-direction:column;align-items:center;gap:var(--space-lg)}.help-modal-close{position:absolute;top:var(--space-sm);right:var(--space-sm);width:32px;height:32px;padding:0;font-size:24px;line-height:1;background:transparent;color:var(--text-secondary);border:none;border-radius:50%;cursor:pointer;transition:all var(--duration-normal) var(--ease-out);display:flex;align-items:center;justify-content:center}.help-modal-close:hover{color:var(--text-primary);background:#ffffff1a}.help-modal-image{width:100%;height:auto;border-radius:var(--radius-md);box-shadow:var(--shadow-md)}.help-modal-dismiss{padding:12px 32px;font-size:15px;font-weight:600;background:linear-gradient(135deg,var(--accent-gold) 0%,var(--accent-gold-dark) 100%);color:var(--bg-deep);border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--duration-normal) var(--ease-out);box-shadow:var(--shadow-md);letter-spacing:.02em}.help-modal-dismiss:hover{background:linear-gradient(135deg,var(--accent-gold-light) 0%,var(--accent-gold) 100%);transform:translateY(-2px);box-shadow:var(--shadow-lg),var(--shadow-glow)}.board-editor{position:absolute;inset:0;background:var(--bg-deep);display:flex;flex-direction:column;overflow:hidden;animation:fadeIn .4s var(--ease-out)}.board-editor>.threshold-adjustment{flex-shrink:0}.board-wrapper{position:relative;display:inline-block}.board-processing-indicator{position:absolute;inset:0;background:#0c0a08bf;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-sm);z-index:10;border-radius:var(--radius-sm);animation:fadeIn .2s var(--ease-out)}.board-processing-indicator span{color:var(--text-primary);font-size:14px;font-weight:500;letter-spacing:.02em}.board-spinner{width:32px;height:32px;border:3px solid 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