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2)}.data-\[state\=active\]\:bg-background[data-state=active]{background-color:var(--background)}.data-\[state\=active\]\:text-foreground[data-state=active]{color:var(--foreground)}.group-data-\[variant\=default\]\/tabs-list\:data-\[state\=active\]\:shadow-sm:is(:where(.group\/tabs-list)[data-variant=default] *)[data-state=active]{--tw-shadow:0 1px 3px 0 var(--tw-shadow-color,#0000001a), 0 1px 2px -1px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.group-data-\[variant\=line\]\/tabs-list\:data-\[state\=active\]\:bg-transparent:is(:where(.group\/tabs-list)[data-variant=line] *)[data-state=active]{background-color:#0000}.group-data-\[variant\=line\]\/tabs-list\:data-\[state\=active\]\:shadow-none:is(:where(.group\/tabs-list)[data-variant=line] *)[data-state=active]{--tw-shadow:0 0 #0000;box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), 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var(--tw-animation-duration,var(--tw-duration,.15s))var(--tw-ease,ease)var(--tw-animation-delay,0s)var(--tw-animation-iteration-count,1)var(--tw-animation-direction,normal)var(--tw-animation-fill-mode,none)}.data-\[state\=closed\]\:fade-out-0[data-state=closed]{--tw-exit-opacity:0}.data-\[state\=closed\]\:zoom-out-95[data-state=closed]{--tw-exit-scale:.95}.data-\[state\=open\]\:animate-in[data-state=open]{animation:enter 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2/span 2}.sm\:group-data-\[size\=default\]\/alert-dialog-content\:place-items-start:is(:where(.group\/alert-dialog-content)[data-size=default] *){place-items:start}.sm\:group-data-\[size\=default\]\/alert-dialog-content\:text-left:is(:where(.group\/alert-dialog-content)[data-size=default] *){text-align:left}.sm\:group-data-\[size\=default\]\/alert-dialog-content\:group-has-data-\[slot\=alert-dialog-media\]\/alert-dialog-content\:col-start-2:is(:where(.group\/alert-dialog-content)[data-size=default] *):is(:where(.group\/alert-dialog-content):has([data-slot=alert-dialog-media]) *){grid-column-start:2}.sm\:group-data-\[size\=default\]\/alert-dialog-content\:has-data-\[slot\=alert-dialog-media\]\:grid-rows-\[auto_1fr\]:is(:where(.group\/alert-dialog-content)[data-size=default] *):has([data-slot=alert-dialog-media]){grid-template-rows:auto 1fr}.data-\[size\=default\]\:sm\:max-w-lg[data-size=default]{max-width:var(--container-lg)}}@media 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svg:not([class*=size-]){width:calc(var(--spacing) * 4);height:calc(var(--spacing) * 4)}.\[\&_svg\:not\(\[class\*\=\'text-\'\]\)\]\:text-muted-foreground svg:not([class*=text-]){color:var(--muted-foreground)}.\[\&_tr\]\:border-b tr{border-bottom-style:var(--tw-border-style);border-bottom-width:1px}.\[\&_tr\:last-child\]\:border-0 tr:last-child{border-style:var(--tw-border-style);border-width:0}.\[\&\:has\(\[role\=checkbox\]\)\]\:pr-0:has([role=checkbox]){padding-right:calc(var(--spacing) * 0)}:is(.\*\:\[span\]\:last\:flex>*):is(span):last-child{display:flex}:is(.\*\:\[span\]\:last\:items-center>*):is(span):last-child{align-items:center}:is(.\*\:\[span\]\:last\:gap-2>*):is(span):last-child{gap:calc(var(--spacing) * 2)}:is(.\*\:\[svg\:not\(\[class\*\=\'size-\'\]\)\]\:size-8>*):is(svg:not([class*=size-])){width:calc(var(--spacing) * 8);height:calc(var(--spacing) * 8)}.\[\&\>\[role\=checkbox\]\]\:translate-y-\[2px\]>[role=checkbox]{--tw-translate-y:2px;translate:var(--tw-translate-x) var(--tw-translate-y)}.\[\&\>tr\]\:last\:border-b-0>tr:last-child{border-bottom-style:var(--tw-border-style);border-bottom-width:0}}@property --tw-animation-delay{syntax:"*";inherits:false;initial-value:0s}@property --tw-animation-direction{syntax:"*";inherits:false;initial-value:normal}@property --tw-animation-duration{syntax:"*";inherits:false}@property --tw-animation-fill-mode{syntax:"*";inherits:false;initial-value:none}@property --tw-animation-iteration-count{syntax:"*";inherits:false;initial-value:1}@property --tw-enter-blur{syntax:"*";inherits:false;initial-value:0}@property --tw-enter-opacity{syntax:"*";inherits:false;initial-value:1}@property --tw-enter-rotate{syntax:"*";inherits:false;initial-value:0}@property --tw-enter-scale{syntax:"*";inherits:false;initial-value:1}@property --tw-enter-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-enter-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-blur{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-opacity{syntax:"*";inherits:false;initial-value:1}@property --tw-exit-rotate{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-scale{syntax:"*";inherits:false;initial-value:1}@property --tw-exit-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-translate-y{syntax:"*";inherits:false;initial-value:0}@property --scroll-fade-t{syntax:"<length-percentage>";inherits:false;initial-value:0}@property --scroll-fade-b{syntax:"<length-percentage>";inherits:false;initial-value:0}@property --scroll-fade-s{syntax:"<length-percentage>";inherits:false;initial-value:0}@property --scroll-fade-e{syntax:"<length-percentage>";inherits:false;initial-value:0}@property --scroll-fade-mask{syntax:"*";inherits:false}@property --shimmer-angle{syntax:"<angle>";inherits:true;initial-value:20deg}@property --shimmer-image{syntax:"*";inherits:false}@property --shimmer-text-fill{syntax:"*";inherits:false}@media (prefers-reduced-motion:reduce){.shimmer{-webkit-text-fill-color:currentColor;background-image:none;animation:none}}:root{--background:#f6f4ee;--foreground:#232d29;--card:#fffef9;--card-foreground:#232d29;--popover:#fffef9;--popover-foreground:#232d29;--primary:#244d3d;--primary-foreground:#fffdf6;--secondary:#eee9df;--secondary-foreground:#283f33;--muted:#ece8e0;--muted-foreground:#697069;--accent:#e4e9df;--accent-foreground:#244d3d;--destructive:#ad3831;--border:#d9d9ce;--input:#d9d9ce;--ring:#977440;--radius:.5rem;--sidebar:#203c31;--sidebar-foreground:#f6f4ee;--sidebar-primary:#bd965d;--sidebar-primary-foreground:#183329;--sidebar-accent:#345142;--sidebar-accent-foreground:#fff;--sidebar-border:#486050;--sidebar-ring:#bda477}*{box-sizing:border-box}body{background:var(--background);color:var(--foreground);margin:0;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.6}button,input,textarea,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}a{color:inherit;text-decoration:none}a,button,input,textarea{outline-offset:5px}a:hover{color:#8a642d}p{color:#68706a;margin:0 0 1.25rem}h1,h2,h3{margin:0;font-family:Georgia,Times New Roman,serif;font-weight:400;line-height:1.12}h1{letter-spacing:-1.5px;font-size:clamp(2.5rem,4vw,3.5rem)}h2{letter-spacing:-.8px;font-size:2.35rem}h3{font-size:1.65rem}.wrap{width:min(1200px,100% - 80px);margin:auto}.topbar{color:#e9ecdf;letter-spacing:.3px;background:#213c30;font-size:12px}.topbar>.wrap{justify-content:space-between;align-items:center;height:35px;display:flex}.topbar .wrap>div{gap:24px;display:flex}.topbar a{align-items:center;gap:8px;display:inline-flex}.header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:20px;min-height:106px;display:flex}.brand{letter-spacing:1px;align-items:center;gap:12px;font-size:25px;font-weight:700;line-height:1;display:flex}.brand-mark{font-family:Georgia,serif;font-size:47px;line-height:1}.brand-sub{letter-spacing:3px;margin-top:8px;font-size:10px;display:block}.header nav{gap:30px;font-size:14px;font-weight:600;display:flex}.header nav a{padding:20px 0}.button{background:var(--primary);border:1px solid var(--primary);color:var(--primary-foreground);border-radius:5px;justify-content:center;align-items:center;gap:10px;padding:13px 22px;font-size:14px;font-weight:600;transition:background .2s;display:inline-flex}.button:hover{color:#fff;background:#35634e}.button.small{padding:11px 16px}.button.outline{color:var(--foreground);background:0 0;border-color:#c8cfc4}.button.outline:hover{background:#e7e9df}.button.cream{color:#244533;background:#f0e7d5;border-color:#f0e7d5}.text-link{align-items:center;gap:22px;font-size:14px;font-weight:600;display:inline-flex}.page-intro{justify-content:space-between;align-items:end;gap:20px;padding:40px 0 28px;display:flex}.eyebrow{letter-spacing:2px;color:#817454;margin-bottom:13px;font-size:12px;font-weight:600;display:block}.page-intro p{margin:14px 0 0}.training{background:#fffdf7;border:1px solid #dbd9cf;border-radius:11px;grid-template-columns:1.15fr 1fr;display:grid;overflow:hidden;box-shadow:0 8px 30px #38322506}.board-area{background:#eeece4;padding:23px 36px 16px}.board-top,.board-bottom{justify-content:space-between;align-items:center;gap:10px;font-size:14px;display:flex}.board-top{margin:0 0 14px}.board-top>span:first-child{align-items:center;gap:8px;font-weight:600;display:flex}.board-top>span:last-child{letter-spacing:1.2px;color:#817a6e;font-size:12px}.white-dot{background:#fff;border:1px solid #b8b5a6;border-radius:50%;width:12px;height:12px;display:inline-block}.board-frame{background:linear-gradient(110deg,#664a32,#9b7650 25%,#785436 62%,#63472f);border-radius:5px;padding:13px;box-shadow:0 7px 15px #563b3720,inset 0 0 0 2px #533d2b}.chessboard{aspect-ratio:1;border:1px solid #412e1f;grid-template-columns:repeat(8,1fr);display:grid;box-shadow:0 0 0 1px #d5b382}.square{aspect-ratio:1;color:#18231e;text-shadow:0 2px 1px #ffffff42;border:0;border-radius:0;justify-content:center;align-items:center;padding:0;font-family:Segoe UI Symbol,Arial Unicode MS,serif;font-size:clamp(26px,3.8vw,53px);line-height:1;display:flex;position:relative}.square.light{background:#e3ceb0}.square.dark{background:#a17b54}.square:hover{box-shadow:inset 0 0 0 3px #d2b15e}.square .rank,.square .file{text-shadow:none;color:#6b4f32;font-family:Arial,sans-serif;font-size:12px;font-weight:600;line-height:1;position:absolute}.square.dark .rank,.square.dark .file{color:#efdec2}.rank{top:4px;left:4px}.file{bottom:3px;right:4px}.board-bottom{color:#717264;margin-top:15px;font-size:12px}.challenge{flex-direction:column;padding:29px 42px 24px;display:flex}.challenge-top{justify-content:space-between;align-items:center;gap:10px;display:flex}.pill{color:#46604b;letter-spacing:.6px;background:#eaf0e5;border-radius:4px;padding:5px 9px;font-size:12px;font-weight:600}.difficulty{color:#6b786b;font-size:12px}.chapter{letter-spacing:1.8px;color:#9a835e;margin-top:30px;font-size:12px;display:block}.challenge h2{letter-spacing:-1.5px;margin-top:13px;font-size:clamp(2.5rem,4vw,3.6rem);line-height:1.04}.challenge>p{margin:20px 0;font-size:16px}.mission{border-top:1px solid #e3e3d9;border-bottom:1px solid #e3e3d9;align-items:center;gap:14px;padding:16px 0;display:flex}.mission-icon{color:#476344;font-size:34px}.mission strong{font-size:16px;display:block}.mission div>span{color:#797e72;font-size:14px}.hint-box{color:#8a7857;align-items:start;gap:12px;margin-top:22px;display:flex}.hint-box svg{flex-shrink:0}.hint-box p{max-width:300px;margin:0;font-size:14px}.challenge-actions{gap:10px;margin:24px 0;display:flex}.icon-button{color:#5c6c5a;background:0 0;border:1px solid #c8cfc4;border-radius:5px;justify-content:center;align-items:center;width:45px;height:45px;display:inline-flex}.next-exercise{color:#35543e;justify-content:space-between;align-items:center;margin-top:auto;font-size:14px;font-weight:600;display:flex}.journal{margin:55px 0}.section-head{justify-content:space-between;align-items:end;gap:20px;margin-bottom:25px;display:flex}.section-head h2{font-size:2rem}.article-grid{grid-template-columns:1.3fr 1fr;gap:24px;display:grid}.article-card{border:1px solid var(--border);background:#fffdf8;border-radius:7px;grid-template-columns:45% 1fr;display:grid;overflow:hidden}.article-card img{object-fit:cover;width:100%;height:100%}.article-card>div{padding:27px}.article-card h3{margin-bottom:14px;font-size:1.65rem}.article-card p{margin:0;font-size:16px}.article-card .eyebrow{letter-spacing:1px;font-size:12px}.text-article{background:#e6e9dc;flex-direction:column;padding:27px;display:flex}.text-article .text-link{margin-top:18px}.newsletter{color:#f4f0e3;background:#213f32;border-radius:8px;justify-content:space-between;align-items:center;gap:25px;margin-bottom:65px;padding:35px 40px;display:flex}.newsletter h2{font-size:1.9rem}.newsletter .eyebrow{color:#c6b88b}.newsletter p{color:#bcc8bc;margin:12px 0 0;font-size:16px}.newsletter .button{flex-shrink:0}footer{background:#eaece2;padding:42px 0 20px}.footer-grid{grid-template-columns:2fr 1fr 1fr;gap:30px;display:grid}.footer-grid p{margin-top:20px;font-size:14px}.footer-grid h3{margin:4px 0 19px;font-family:Arial,sans-serif;font-size:14px;font-weight:600}.footer-grid>div>a:not(.brand){color:#637163;margin-bottom:10px;font-size:14px;display:block}.footer-bottom{color:#6d786a;border-top:1px solid #cfd4c7;justify-content:space-between;gap:20px;margin-top:27px;padding-top:20px;font-size:12px;display:flex}.footer-bottom>div{flex-wrap:wrap;gap:18px;display:flex}@media (width<=900px){.wrap{width:calc(100% - 40px)}.header nav{gap:17px}.header>.button{display:none}.training{grid-template-columns:1.1fr 1fr}.board-area{padding:18px}.challenge{padding:22px}.chapter{margin-top:20px}.challenge h2{font-size:2.8rem}.challenge-top{flex-wrap:wrap}.article-grid{grid-template-columns:1fr 1fr}.article-card{flex-direction:column;display:flex}.article-card 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