@font-face{font-family:Fraunces;font-style:normal;font-weight:300 900;font-display:swap;src:url(/fonts/fraunces-normal-variable.woff2) format("woff2")}@font-face{font-family:Fraunces;font-style:italic;font-weight:300 900;font-display:swap;src:url(/fonts/fraunces-italic-variable.woff2) format("woff2")}@font-face{font-family:Plus Jakarta Sans;font-style:normal;font-weight:200 800;font-display:swap;src:url(/fonts/plus-jakarta-sans-normal-variable.woff2) format("woff2")}@font-face{font-family:Plus Jakarta Sans;font-style:italic;font-weight:200 800;font-display:swap;src:url(/fonts/plus-jakarta-sans-italic-variable.woff2) format("woff2")}:root{--bg: oklch(14% .01 60);--bg-card: oklch(18% .01 60);--bg-elevated: oklch(22% .01 60);--bg-hover: oklch(24% .012 60);--border: oklch(25% .01 60);--border-subtle: oklch(21% .008 60);--text: oklch(92% .01 60);--text-secondary: oklch(65% .015 60);--text-muted: oklch(50% .012 60);--accent: oklch(72% .15 75);--accent-hover: oklch(78% .17 75);--accent-muted: oklch(72% .15 75 / .15);--accent-subtle: oklch(72% .15 75 / .08);--success: oklch(65% .15 145);--success-muted: oklch(65% .15 145 / .15);--danger: oklch(60% .18 25);--danger-muted: oklch(60% .18 25 / .12);--warning: oklch(72% .14 85);--warning-muted: oklch(72% .14 85 / .15);--font-body: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;--font-display: "Fraunces", "Georgia", serif;--text-xs: clamp(.7rem, .68rem + .1vw, .75rem);--text-sm: clamp(.8rem, .77rem + .15vw, .875rem);--text-base: 1rem;--text-lg: clamp(1.05rem, 1rem + .25vw, 1.125rem);--text-xl: clamp(1.15rem, 1.05rem + .5vw, 1.35rem);--text-2xl: clamp(1.4rem, 1.2rem + 1vw, 1.75rem);--text-3xl: clamp(1.75rem, 1.4rem + 1.75vw, 2.5rem);--text-4xl: clamp(2.2rem, 1.6rem + 3vw, 3.5rem);--leading-tight: 1.2;--leading-snug: 1.35;--leading-normal: 1.65;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--space-3xl: 64px;--space-4xl: 96px;--radius-sm: 4px;--radius: 6px;--radius-lg: 8px;--shadow-sm: 0 1px 2px oklch(0% 0 0 / .15);--shadow-md: 0 2px 8px oklch(0% 0 0 / .2);--shadow-lg: 0 4px 16px oklch(0% 0 0 / .25);--shadow-lift: 0 4px 12px oklch(0% 0 0 / .2);--ease-out: cubic-bezier(.25, 0, .25, 1);--duration: .15s;--duration-slow: .25s}:root[data-theme=light]{--bg: oklch(97% .01 60);--bg-card: oklch(100% .005 60);--bg-elevated: oklch(94% .01 60);--bg-hover: oklch(92% .012 60);--border: oklch(85% .01 60);--border-subtle: oklch(90% .008 60);--text: oklch(18% .01 60);--text-secondary: oklch(40% .015 60);--text-muted: oklch(55% .012 60);--accent: oklch(55% .15 75);--accent-hover: oklch(50% .17 75);--accent-muted: oklch(55% .15 75 / .15);--accent-subtle: oklch(55% .15 75 / .08);--success: oklch(45% .15 145);--success-muted: oklch(45% .15 145 / .12);--danger: oklch(50% .18 25);--danger-muted: oklch(50% .18 25 / .1);--warning: oklch(55% .14 85);--warning-muted: oklch(55% .14 85 / .12);--shadow-sm: 0 1px 2px oklch(0% 0 0 / .06);--shadow-md: 0 2px 8px oklch(0% 0 0 / .08);--shadow-lg: 0 4px 16px oklch(0% 0 0 / .1);--shadow-lift: 0 4px 12px oklch(0% 0 0 / .08)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--text-base);line-height:var(--leading-normal);min-height:100vh}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);line-height:var(--leading-tight);color:var(--text);font-weight:500;letter-spacing:-.01em}h1{font-size:var(--text-3xl);font-weight:600}h2{font-size:var(--text-2xl)}h3{font-size:var(--text-xl)}h4{font-size:var(--text-lg)}p+p{margin-top:var(--space-md)}strong{font-weight:650}.stat-value,.move-number,.badge{font-variant-numeric:tabular-nums}a{color:var(--accent);text-decoration:none;transition:color var(--duration) var(--ease-out)}a:hover{color:var(--accent-hover)}.container{max-width:1200px;margin:0 auto;padding:0 var(--space-lg) var(--space-3xl)}@media(max-width:640px){.container{padding:0 var(--space-md) var(--space-3xl)}}.nav-wrapper{border-bottom:1px solid var(--border-subtle);background:#0c0806cc;backdrop-filter:blur(12px) saturate(1.5);-webkit-backdrop-filter:blur(12px) saturate(1.5);top:0;z-index:100;position:sticky}:root[data-theme=light] .nav-wrapper{background:#faf4efcc}.nav{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-md) var(--space-lg);max-width:1200px;margin:0 auto}.nav-logo{font-family:var(--font-display);font-size:var(--text-lg);font-weight:600;color:var(--text)!important;display:flex;align-items:center;gap:var(--space-sm);letter-spacing:-.02em;flex-shrink:0}.nav-links{display:flex;align-items:center;gap:var(--space-xs);margin-left:auto}.nav-link{color:var(--text-secondary);padding:var(--space-sm) var(--space-md);border-radius:var(--radius);transition:color var(--duration) var(--ease-out),background var(--duration) var(--ease-out);font-size:var(--text-sm);font-weight:500;letter-spacing:.01em;white-space:nowrap}.nav-link:hover{color:var(--text);background:var(--accent-subtle)}.nav-user-row{display:flex;align-items:center;gap:var(--space-xs)}.nav-link[data-status=active]{color:var(--accent);background:var(--accent-subtle)}.nav-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;background:none;border:none;cursor:pointer;margin-left:auto;padding:0;-webkit-tap-highlight-color:transparent}.nav-toggle-icon,.nav-toggle-icon:before,.nav-toggle-icon:after{display:block;width:20px;height:2px;background:var(--text);border-radius:1px;transition:transform var(--duration) var(--ease-out),opacity var(--duration) var(--ease-out);position:relative}.nav-toggle-icon:before,.nav-toggle-icon:after{content:"";position:absolute;left:0;width:20px}.nav-toggle-icon:before{top:-6px}.nav-toggle-icon:after{top:6px}.nav-toggle-icon.open{background:transparent}.nav-toggle-icon.open:before{top:0;transform:rotate(45deg)}.nav-toggle-icon.open:after{top:0;transform:rotate(-45deg)}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-lg)}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:var(--space-md)}button{cursor:pointer;font-family:inherit;font-size:inherit;color:inherit}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-lg);border-radius:var(--radius);border:1px solid var(--border);background:transparent;color:var(--text-secondary);font-weight:550;font-size:var(--text-sm);line-height:1.5;transition:all var(--duration) var(--ease-out);white-space:nowrap;-webkit-user-select:none;user-select:none}.btn:hover{color:var(--text);background:var(--bg-elevated);border-color:#322d29;transform:translateY(-1px);box-shadow:var(--shadow-sm)}.btn:active{transform:translateY(0);box-shadow:none}.btn:disabled{opacity:.45;pointer-events:none;transform:none}.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.btn-primary{background:var(--accent);border-color:var(--accent);color:#100a03}.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#0a0501;box-shadow:var(--shadow-md)}.btn-danger{background:transparent;border-color:var(--danger);color:var(--danger)}.btn-danger:hover{background:var(--danger);color:var(--text);border-color:var(--danger)}.btn-sm{padding:var(--space-xs) var(--space-md);font-size:var(--text-xs)}input,textarea,select{font-family:inherit;font-size:inherit}.input{width:100%;padding:var(--space-sm) var(--space-md);background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-size:var(--text-sm);line-height:1.5;outline:none;transition:border-color var(--duration) var(--ease-out),box-shadow var(--duration) var(--ease-out)}.input:hover{border-color:#322d29}.input:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-muted)}.input::placeholder{color:var(--text-muted)}textarea.input{resize:vertical;min-height:120px}.label{display:block;margin-bottom:var(--space-xs);font-size:var(--text-sm);font-weight:550;color:var(--text-secondary);letter-spacing:.01em}.form-group{margin-bottom:var(--space-md)}select.input{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right var(--space-md) center;padding-right:var(--space-2xl)}.badge{display:inline-flex;align-items:center;padding:2px var(--space-sm);border-radius:var(--radius-sm);font-size:var(--text-xs);font-weight:600;letter-spacing:.02em}.badge-white{background:#e3ddd8;color:#15110d}.badge-black{background:#322d29;color:#d3ccc7}.badge-due{background:var(--warning-muted);color:var(--warning);border:1px solid oklch(72% .14 85 / .25)}.badge-success{background:var(--success-muted);color:var(--success);border:1px solid oklch(65% .15 145 / .25)}.page-header{display:flex;align-items:baseline;justify-content:space-between;margin:var(--space-2xl) 0 var(--space-xl)}.page-header h1{font-size:var(--text-2xl)}.empty{text-align:center;padding:var(--space-4xl) var(--space-lg);color:var(--text-secondary)}.empty-icon{font-size:2.5rem;margin-bottom:var(--space-md);opacity:.6}.empty p{max-width:360px;margin-left:auto;margin-right:auto}.stat{text-align:center;padding:var(--space-xl) var(--space-lg)}.stat-value{font-family:var(--font-display);font-size:var(--text-3xl);font-weight:600;letter-spacing:-.02em;line-height:1;margin-bottom:var(--space-xs)}.stat-label{font-size:var(--text-sm);color:var(--text-muted);font-weight:500;text-transform:uppercase;letter-spacing:.06em}.alert{padding:var(--space-sm) var(--space-md);border-radius:var(--radius);margin-bottom:var(--space-md);font-size:var(--text-sm);font-weight:500;border:1px solid transparent}.alert-success{background:var(--success-muted);border-color:#4aa65140;color:var(--success)}.alert-error{background:var(--danger-muted);border-color:#d7474533;color:var(--danger)}.move-list{display:flex;flex-wrap:wrap;gap:3px;font-family:Plus Jakarta Sans,monospace;font-size:var(--text-sm);line-height:1.8}.move-number{color:var(--text-muted);font-size:var(--text-xs)}.move{padding:1px var(--space-xs);border-radius:var(--radius-sm);transition:background var(--duration) var(--ease-out)}.move-current{background:var(--accent);color:#100a03;font-weight:600}.move-correct{background:var(--success-muted);color:var(--success)}.move-wrong{background:var(--danger-muted);color:var(--danger)}.modal-overlay{position:fixed;inset:0;background:#000000a6;display:flex;align-items:center;justify-content:center;z-index:200;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:fadeIn var(--duration-slow) var(--ease-out)}.modal{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-xl);min-width:340px;max-width:480px;box-shadow:var(--shadow-lg);animation:modalIn var(--duration-slow) var(--ease-out)}.modal h2{margin-bottom:var(--space-lg);font-size:var(--text-xl)}.modal-actions{display:flex;gap:var(--space-sm);justify-content:flex-end;margin-top:var(--space-xl)}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes modalIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media(max-width:640px){.card-grid{grid-template-columns:1fr}.page-header{flex-direction:column;align-items:flex-start;gap:var(--space-md);margin:var(--space-xl) 0 var(--space-lg)}.nav{padding:var(--space-sm) var(--space-md);flex-wrap:wrap}.nav-toggle{display:flex}.nav-links{display:none;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--border);padding:var(--space-sm) var(--space-md);gap:0;z-index:99;box-shadow:0 4px 12px #00000026}.nav-links--open{display:flex}.nav-link{padding:var(--space-md);font-size:var(--text-base);border-radius:var(--radius);width:100%}.nav-link:hover{background:var(--accent-subtle)}.nav-user-row{width:100%;justify-content:space-between;padding:0}}.chessboard-wrap{width:100%!important;height:auto!important;aspect-ratio:1 / 1;overflow:visible}.chessboard-wrap coords{pointer-events:none}.btn-theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--border);border-radius:var(--radius);background:transparent;cursor:pointer;font-size:1.1rem;line-height:1;transition:background var(--duration) var(--ease-out),border-color var(--duration) var(--ease-out);flex-shrink:0}.btn-theme-toggle:hover{background:var(--bg-elevated);border-color:var(--accent)}:root[data-theme=light] .btn-primary{color:#fdf8f1}:root[data-theme=light] .btn-primary:hover{color:#fdf8f1}:root[data-theme=light] .btn:hover{border-color:#bcb6b1}:root[data-theme=light] .badge-white{background:#322d29;color:#eae3de}:root[data-theme=light] .badge-black{background:#d3ccc7;color:#25211d}:root[data-theme=light] .move-current{color:#fdf8f1}:root[data-theme=light] .modal-overlay{background:#00000059}:root[data-theme=light] .input:hover{border-color:#bcb6b1}::selection{background:var(--accent-muted);color:var(--text)}.dialog-overlay{position:fixed;inset:0;background:#00000080;z-index:100}.dialog-overlay[data-state=open]{animation:overlayShow .15s ease-out}.dialog-overlay[data-state=closed]{animation:overlayHide .15s ease-in}.dialog-content{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;max-width:420px;width:90vw;z-index:101}.dialog-content[data-state=open]{animation:contentShow .15s ease-out}.dialog-content[data-state=closed]{animation:contentHide .15s ease-in}.dialog-title{font-family:var(--font-display);font-size:var(--text-lg);font-weight:500;margin-bottom:.5rem}.dialog-description{color:var(--text-muted);font-size:.9rem;line-height:1.5;margin-bottom:1.25rem}.dialog-actions{display:flex;justify-content:flex-end;gap:.5rem}@keyframes overlayShow{0%{opacity:0}to{opacity:1}}@keyframes overlayHide{0%{opacity:1}to{opacity:0}}@keyframes contentShow{0%{opacity:0;transform:translate(-50%,-48%) scale(.96)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}@keyframes contentHide{0%{opacity:1;transform:translate(-50%,-50%) scale(1)}to{opacity:0;transform:translate(-50%,-48%) scale(.96)}}.eval-bar-mobile-wrap{display:none}.eval-bar-desktop-wrap{display:block}.eval-bar-desktop-wrap .eval-bar-horizontal,.eval-bar-mobile-wrap .eval-bar-vertical{display:none!important}.eval-bar-mobile-wrap .eval-bar-horizontal{display:flex!important}@media(max-width:640px){.eval-bar-mobile-wrap{display:block}.eval-bar-desktop-wrap{display:none}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#25211d;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#322d29}:root[data-theme=light] ::-webkit-scrollbar-thumb{background:#c3bcb7}:root[data-theme=light] ::-webkit-scrollbar-thumb:hover{background:#a9a39e}:root[data-theme=light] ::selection{background:#98660040;background:oklch(55% .15 75 / .25)}@media(max-width:640px){.opening-board-layout{grid-template-columns:1fr!important}}.blog-content{color:var(--text);font-size:var(--text-base);line-height:1.8}.blog-content h1{display:none}.blog-content h2{font-family:var(--font-display);font-size:var(--text-xl);font-weight:500;margin-top:var(--space-2xl);margin-bottom:var(--space-md);color:var(--text)}.blog-content h3{font-family:var(--font-display);font-size:var(--text-lg);font-weight:500;margin-top:var(--space-xl);margin-bottom:var(--space-sm);color:var(--text)}.blog-content p{margin-bottom:var(--space-md);color:var(--text-secondary)}.blog-content a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}.blog-content a:hover{color:var(--accent-hover)}.blog-content strong{color:var(--text);font-weight:600}.blog-content em{font-style:italic}.blog-content ul,.blog-content ol{margin-bottom:var(--space-md);padding-left:var(--space-lg);color:var(--text-secondary)}.blog-content li{margin-bottom:var(--space-xs)}.blog-content code{font-family:var(--font-mono, monospace);font-size:.9em;padding:2px 6px;border-radius:4px;background:var(--bg-elevated);border:1px solid var(--border-subtle)}.blog-content pre{margin-bottom:var(--space-md);padding:var(--space-md);border-radius:var(--radius);background:var(--bg-elevated);border:1px solid var(--border);overflow-x:auto}.blog-content pre code{padding:0;border:none;background:none}.blog-content hr{border:none;border-top:1px solid var(--border);margin:var(--space-xl) 0}:root{--ease-spring: cubic-bezier(.34, 1.56, .64, 1)}.board-fx{position:relative}.square-flash{position:absolute;width:12.5%;height:12.5%;z-index:3;pointer-events:none;border-radius:4px;background:#39c34b73;box-shadow:inset 0 0 0 3px #51d75e,0 0 18px #39c34bb3;animation:squareFlash .7s var(--ease-out) forwards}@keyframes squareFlash{0%{opacity:0;transform:scale(.6)}25%{opacity:1;transform:scale(1.15)}to{opacity:0;transform:scale(1.35)}}.drill-card-header{display:flex;align-items:center;gap:.5rem;margin-bottom:.5rem;min-height:28px}.combo-chip{display:inline-flex;align-items:center;gap:2px;padding:2px 10px;border-radius:999px;font-weight:700;font-size:var(--text-sm);color:#270e01;background:linear-gradient(135deg,#fcab00,#fe6a00);background:linear-gradient(135deg,color(xyz 0.547 0.498 0.065),#fe6a00);box-shadow:0 2px 10px #fe6a0059;animation:comboPop .38s var(--ease-spring)}.combo-chip.is-broken{filter:grayscale(1);box-shadow:none;animation:comboBreak .7s var(--ease-out) forwards}@keyframes comboPop{0%{transform:scale(.6)}60%{transform:scale(1.2)}to{transform:scale(1)}}@keyframes comboBreak{0%,to{transform:rotate(0)}15%{transform:rotate(-12deg)}35%{transform:rotate(9deg)}55%{transform:rotate(-5deg);opacity:1}to{opacity:0;transform:translateY(6px)}}.move-reveal{display:inline-block;animation:moveReveal 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var(--space-xs);animation:statusIn .28s var(--ease-out)}.line-complete-title{font-family:var(--font-display);font-size:var(--text-2xl);font-weight:700;color:var(--success)}.line-complete.is-perfect .line-complete-title{display:inline-block;color:var(--accent);animation:stamp .52s var(--ease-spring)}@keyframes stamp{0%{opacity:0;transform:scale(2.2) rotate(-8deg)}60%{opacity:1;transform:scale(.94) rotate(-3deg)}to{transform:scale(1) rotate(-3deg)}}.line-complete-sub{color:var(--text-secondary);font-size:var(--text-sm);margin:var(--space-xs) 0 var(--space-md)}.confetti{position:absolute;left:50%;top:30%;width:0;height:0;pointer-events:none;z-index:10}.confetti span{position:absolute;width:8px;height:12px;opacity:0;animation:confetti 1.8s cubic-bezier(.2,.6,.4,1) var(--d) forwards}@keyframes confetti{0%{opacity:1;transform:translate(0) rotate(0) scale(.4)}30%{opacity:1;transform:translate(calc(var(--x) * .7),var(--y)) rotate(calc(var(--r) * .4)) 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58%);transform:translate(-60%,-60%);pointer-events:none;z-index:10}.onboarding-pick:hover,.onboarding-pick:focus-visible{transform:scale(1.04);border-color:var(--accent);box-shadow:0 12px 32px -8px var(--accent-muted);z-index:1}.onboarding-pick:hover:after,.onboarding-pick:focus-visible:after{animation:onboarding-shimmer 5s infinite}@keyframes 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solid var(--border);border-radius:var(--radius-lg);overflow:hidden}.upcoming-banner{display:flex;align-items:center;gap:var(--space-xs);padding:2px var(--space-sm);background:var(--accent-muted);color:var(--accent);font-size:var(--text-xs);font-weight:600}.upcoming-name{padding:var(--space-xs) var(--space-sm);font-size:var(--text-xs);color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}