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var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.aria-invalid\:ring-destructive\/20[aria-invalid=true]{--tw-ring-color:var(--destructive)}@supports (color:color-mix(in lab, red, red)){.aria-invalid\:ring-destructive\/20[aria-invalid=true]{--tw-ring-color:color-mix(in oklab, var(--destructive) 20%, transparent)}}.data-\[size\=sm\]\:\[--card-spacing\:--spacing\(3\)\][data-size=sm]{--card-spacing:calc(var(--spacing) * 3)}.data-\[size\=sm\]\:has-data-\[slot\=card-footer\]\:pb-0[data-size=sm]:has([data-slot=card-footer]){padding-bottom:0}:is(.\*\:data-\[slot\=alert-description\]\:text-destructive\/90>*)[data-slot=alert-description]{color:var(--destructive)}@supports (color:color-mix(in lab, red, red)){:is(.\*\:data-\[slot\=alert-description\]\:text-destructive\/90>*)[data-slot=alert-description]{color:color-mix(in oklab, var(--destructive) 90%, transparent)}}@supports 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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-open\:fade-in-0:where([data-state=open]),.data-open\:fade-in-0:where([data-open]:not([data-open=false])){--tw-enter-opacity:0}.data-open\:zoom-in-95:where([data-state=open]),.data-open\:zoom-in-95:where([data-open]:not([data-open=false])){--tw-enter-scale:.95}.data-closed\:animate-out:where([data-state=closed]),.data-closed\:animate-out:where([data-closed]:not([data-closed=false])){animation:exit 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-closed\:fade-out-0:where([data-state=closed]),.data-closed\:fade-out-0:where([data-closed]:not([data-closed=false])){--tw-exit-opacity:0}.data-closed\:zoom-out-95:where([data-state=closed]),.data-closed\:zoom-out-95:where([data-closed]:not([data-closed=false])){--tw-exit-scale:.95}.\[\&_a\]\:underline a{text-decoration-line:underline}.\[\&_a\]\:underline-offset-3 a{text-underline-offset:3px}@media (hover:hover){.\[\&_a\]\:hover\:text-foreground a:hover{color:var(--foreground)}}.\[\&_p\:not\(\:last-child\)\]\:mb-4 p:not(:last-child){margin-bottom:calc(var(--spacing) * 4)}.\[\&_svg\]\:pointer-events-none svg{pointer-events:none}.\[\&_svg\]\:shrink-0 svg{flex-shrink:0}.\[\&_svg\:not\(\[class\*\=\'size-\'\]\)\]\:size-3 svg:not([class*=size-]){width:calc(var(--spacing) * 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red)){.\[a\]\:hover\:bg-primary\/80:is(a):hover{background-color:color-mix(in oklab, var(--primary) 80%, transparent)}}.\[a\]\:hover\:bg-secondary\/80:is(a):hover{background-color:var(--secondary)}@supports (color:color-mix(in lab, red, red)){.\[a\]\:hover\:bg-secondary\/80:is(a):hover{background-color:color-mix(in oklab, var(--secondary) 80%, transparent)}}.\[a\]\:hover\:text-muted-foreground:is(a):hover{color:var(--muted-foreground)}:is(.\*\:\[a\]\:hover\:text-foreground>*):is(a):hover{color:var(--foreground)}}:is(.\*\:\[img\:first-child\]\:rounded-t-xl>*):is(img:first-child){border-top-left-radius:calc(var(--radius) * 1.4);border-top-right-radius:calc(var(--radius) * 1.4)}:is(.\*\:\[img\:last-child\]\:rounded-b-xl>*):is(img:last-child){border-bottom-right-radius:calc(var(--radius) * 1.4);border-bottom-left-radius:calc(var(--radius) * 1.4)}:is(.\*\:\[svg\]\:row-span-2>*):is(svg){grid-row:span 2/span 2}:is(.\*\:\[svg\]\:translate-y-0\.5>*):is(svg){--tw-translate-y:calc(var(--spacing) * .5);translate:var(--tw-translate-x) var(--tw-translate-y)}:is(.\*\:\[svg\]\:text-current>*):is(svg){color:currentColor}:is(.\*\:\[svg\:not\(\[class\*\=\'size-\'\]\)\]\:size-4>*):is(svg:not([class*=size-])){width:calc(var(--spacing) * 4);height:calc(var(--spacing) * 4)}.\[\&\>svg\]\:pointer-events-none>svg{pointer-events:none}.\[\&\>svg\]\:size-3\!>svg{width:calc(var(--spacing) * 3)!important;height:calc(var(--spacing) * 3)!important}}@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}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:var(--text-body);-webkit-font-smoothing:antialiased;margin:0;font-weight:400;line-height:1.6;transition:background-color .2s,color .2s}button,.btn,select,label,a{touch-action:manipulation;-webkit-tap-highlight-color:transparent}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px}::selection{background:var(--accent-soft)}.skip-link{z-index:100;background:var(--surface);color:var(--accent-strong);border:1px solid var(--line);border-radius:8px;padding:8px 14px;text-decoration:none;position:absolute;top:0;left:-9999px}.skip-link:focus{outline:2px solid var(--accent);top:8px;left:8px}.app{flex-direction:column;min-height:100vh;display:flex;overflow-x:hidden}.container{width:100%;max-width:76rem;margin:0 auto;padding:0 1.5rem}main#main{flex:auto;width:100%;scroll-margin-top:96px}h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink);text-wrap:balance;letter-spacing:-.02em;line-height:1.2}h1{font-size:var(--text-h1);margin:0 0 6px;font-weight:700}h2{font-size:var(--text-h2);margin:0 0 10px;scroll-margin-top:96px;font-weight:700}h3{font-size:var(--text-h3);margin:0 0 6px;scroll-margin-top:96px;font-weight:600}p{overflow-wrap:break-word;min-width:0;margin:8px 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img{width:auto;height:30px;display:block}.brand-mark{background:var(--accent);width:20px;height:20px;color:var(--surface);border-radius:6px;justify-content:center;align-self:center;align-items:center;font-size:12px;font-weight:600;line-height:1;display:inline-flex}.nav{scrollbar-width:none;flex:auto;justify-content:center;align-items:center;gap:4px;min-width:0;display:flex}.nav::-webkit-scrollbar{display:none}.nav-link{color:var(--ink-soft);border-radius:var(--radius-pill);white-space:nowrap;border:1px solid #0000;align-items:center;gap:7px;padding:8px 13px;font-size:14px;font-weight:500;text-decoration:none;transition:color .15s,background-color .15s,border-color .15s;display:inline-flex}.nav-link svg{flex:none;width:16px;height:16px}.nav-link:hover{color:var(--accent-strong);background:var(--surface-2)}.nav-link.active{color:var(--accent-strong);background:var(--surface);border-color:var(--line);box-shadow:var(--shadow-sm);font-weight:600}.header-controls{align-items:center;gap:8px;display:flex}.theme-toggle{width:38px;height:38px}.theme-toggle svg{width:18px;height:18px}.select-control{font:inherit;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);color:var(--ink);cursor:pointer;padding:7px 11px;font-size:13px;font-weight:600}.btn{font:inherit;letter-spacing:.01em;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;border-radius:.75rem;justify-content:center;align-items:center;gap:6px;min-height:44px;padding:10px 16px;font-size:14.5px;font-weight:600;text-decoration:none;transition:transform .15s,box-shadow .15s,background-color .15s,border-color .15s,color .15s;display:inline-flex}.btn:hover{box-shadow:var(--shadow-sm);border-color:var(--line-strong);transform:scale(.98)}.btn:active{transform:scale(.98)}.btn.ghost{box-shadow:none;color:var(--secondary);background:0 0;border-color:#0000}.btn.ghost:hover{background:var(--tertiary-container);color:var(--accent-strong);border-color:#0000}.btn.primary{background:var(--accent);color:var(--on-accent);border-color:#0000}.btn.primary:hover{background:var(--accent)}@supports (color:color-mix(in lab, red, red)){.btn.primary:hover{background:color-mix(in srgb, var(--accent) 88%, #000)}}.btn.primary:hover{color:var(--on-accent);box-shadow:var(--shadow-sm);border-color:#0000}.btn.danger{background:var(--bad);color:var(--on-danger);border-color:#0000}.btn.danger:hover{background:var(--danger-hover);color:var(--on-danger);border-color:#0000}.btn:disabled{opacity:.55;cursor:default;box-shadow:none;transform:none}.spinner{border:2px 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22px}.card-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;display:grid}.card-grid>.card{margin:0}.question-card{overflow-wrap:break-word;min-width:0;font-size:16px}.q-source{color:var(--ink-soft);flex-wrap:wrap;gap:4px 14px;margin-top:10px;font-size:12.5px;display:flex}.q-source a{color:var(--accent);text-underline-offset:2px;font-weight:500;text-decoration:underline}.q-credit{color:var(--ink-faint)}.katex-display{padding:1px 0;overflow:auto hidden}.hero{border:1.5px solid var(--line);background:var(--surface);box-shadow:none;border-radius:1rem;flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:24px;margin:24px 0 8px;padding:30px 30px 26px;display:flex;position:relative}.hero-copy{flex:340px;min-width:0}.hero-copy h1{font-size:var(--text-hero);letter-spacing:-.03em;margin:0 0 10px}.hero-copy p{color:var(--ink-soft);max-width:46ch;margin:0 0 6px;font-size:15.5px}.hero-flame{border:1.5px solid 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