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monospace;--standard-border-radius:5px;--bg:#fff;--accent-bg:#f5f7ff;--text:#000000;--text-light:#585858;--border:#898EA4;--accent:#000088;--accent-hover:#1266e2;--accent-text:var(--bg);--code:#d81b60;--preformatted:#444;--marked:#000066;--disabled:#efefef;--danger:#aa0000}@media(prefers-color-scheme:dark){:root,::backdrop{color-scheme:dark;--bg:#212121;--accent-bg:#2b2b2b;--text:#dcdcdc;--text-light:#ababab;--accent:#ffb300;--accent-hover:#ffe099;--accent-text:var(--bg);--code:#f06292;--preformatted:#ccc;--disabled:#111}img,video{opacity:.8}}*,*::before,*::after{box-sizing:border-box}textarea,select,input,progress{appearance:none;-webkit-appearance:none;-moz-appearance:none}html{font-family:var(--sans-font);scroll-behavior:smooth}body{color:var(--text);background-color:var(--bg);font-size:1.75rem;line-height:1.5;margin:0;padding-top:5rem}body>header{background-color:var(--accent-bg);text-align:center;padding:0 1rem;display:grid;grid-template-columns:25% auto;left:0;position:fixed;right:0;z-index:30;top:0}body>header>*:only-child{margin-block-start:2rem}body>header h1{margin:1rem 0;grid-column:1}body>header p{max-width:40rem;margin:1rem auto}body>header a,body>header a:visited{text-decoration:none;color:var(--text)}main{padding-top:3rem;max-width:1800px;margin:0 auto}body>footer{margin-top:4rem;padding:2rem 1rem 1.5rem;color:var(--text-light);font-size:.9rem;text-align:center;border-top:1px solid var(--border)}h1,h2,h3,h4{font-family:var(--heading-font)}h1{font-size:3rem}h2{font-size:2.6rem;margin-top:3rem}h3{font-size:2rem;margin-top:3rem}h4{font-size:1.44rem}h5{font-size:1.15rem}h6{font-size:.96rem}p{margin:1.5rem 0}p,h1,h2,h3,h4,h5,h6{overflow-wrap:break-word}h1,h2,h3{line-height:1.1}@media only screen and (max-width:720px){h1{font-size:2.5rem}h2{font-size:2.1rem}h3{font-size:1.75rem}h4{font-size:1.25rem}}a,a:visited{color:var(--accent)}a:hover{text-decoration:none}button,.button,a.button,input[type=submit],input[type=reset],input[type=button],label[type=button]{border:1px solid var(--accent);background-color:var(--accent);color:var(--accent-text);padding:.5rem .9rem;text-decoration:none;line-height:normal}.button[aria-disabled=true],input:disabled,textarea:disabled,select:disabled,button[disabled]{cursor:not-allowed;background-color:var(--disabled);border-color:var(--disabled);color:var(--text-light)}input[type=range]{padding:0}abbr[title]{cursor:help;text-decoration-line:underline;text-decoration-style:dotted}button:enabled:hover,.button:not([aria-disabled=true]):hover,input[type=submit]:enabled:hover,input[type=reset]:enabled:hover,input[type=button]:enabled:hover,label[type=button]:hover{background-color:var(--accent-hover);border-color:var(--accent-hover);cursor:pointer}.button:focus-visible,button:focus-visible:where(:enabled),input:enabled:focus-visible:where( [type=submit],[type=reset],[type=button] ){outline:2px solid var(--accent);outline-offset:1px}header>nav{font-size:1.5rem;line-height:2;padding:1rem 2rem 0 0;grid-column:2}header h1{text-align:left;margin:0}header>nav ul,header>nav ol{align-content:space-around;align-items:center;display:flex;flex-direction:row;flex-wrap:wrap;justify-content:right;list-style-type:none;margin:0;padding:0}header>nav ul li,header>nav ol li{display:inline-block;margin-left:2em}header>nav a,header>nav a:visited{margin:0 .5rem 1rem;color:var(--accent);font-weight:700;display:inline-block;padding:.1rem 1rem;text-decoration:none}header>nav a:hover,header>nav a.current,header>nav a[aria-current=page]{border-color:var(--accent);color:var(--accent);cursor:pointer}@media only screen and (max-width:720px){header>nav a{border:none;padding:0;text-decoration:underline;line-height:1}}aside,details,pre,progress{background-color:var(--accent-bg);border:1px solid var(--border);border-radius:var(--standard-border-radius);margin-bottom:1rem}aside{font-size:1rem;width:30%;padding:0 15px;margin-inline-start:15px;float:right}*[dir=rtl] aside{float:left}@media only screen and (max-width:720px){aside{width:100%;float:none;margin-inline-start:0}}article,fieldset,dialog{padding:1rem}article h2:first-child,section h2:first-child,article h3:first-child,section h3:first-child{margin-top:1rem}section{padding:2rem 1rem;margin:3rem 0}section+section,section:first-child{border-top:0;padding-top:0}section+section{margin-top:0}section:last-child{border-bottom:0;padding-bottom:0}details{padding:.7rem 1rem}summary{cursor:pointer;font-weight:700;padding:.7rem 1rem;margin:-.7rem -1rem;word-break:break-all}details[open]>summary+*{margin-top:0}details[open]>summary{margin-bottom:.5rem}details[open]>:last-child{margin-bottom:0}table{border-collapse:collapse;margin:1.5rem 0}figure>table{width:max-content;margin:0}td,th{border:1px solid var(--border);text-align:start;padding:.5rem}th{background-color:var(--accent-bg);font-weight:700}tr:nth-child(even){background-color:var(--accent-bg)}table caption{font-weight:700;margin-bottom:.5rem}textarea,select,input,button,.button{font-size:inherit;font-family:inherit;padding:.5rem 2rem;margin-bottom:.5rem;border-radius:var(--standard-border-radius);box-shadow:none;max-width:100%;display:inline-block}textarea,select,input{color:var(--text);background-color:var(--bg);border:1px solid var(--border)}label{display:block}textarea:not([cols]){width:100%}select:not([multiple]){background-image:linear-gradient(45deg,transparent 49%,var(--text) 51%),linear-gradient(135deg,var(--text) 51%,transparent 49%);background-position:calc(100% - 15px),calc(100% - 10px);background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-inline-end:25px}*[dir=rtl] select:not([multiple]){background-position:10px,15px}input[type=checkbox],input[type=radio]{vertical-align:middle;position:relative;width:min-content}input[type=checkbox]+label,input[type=radio]+label{display:inline-block}input[type=radio]{border-radius:100%}input[type=checkbox]:checked,input[type=radio]:checked{background-color:var(--accent)}input[type=checkbox]:checked::after{content:" ";width:.18em;height:.32em;border-radius:0;position:absolute;top:.05em;left:.17em;background-color:transparent;border-right:solid var(--bg).08em;border-bottom:solid var(--bg).08em;font-size:1.8em;transform:rotate(45deg)}input[type=radio]:checked::after{content:" ";width:.25em;height:.25em;border-radius:100%;position:absolute;top:.125em;background-color:var(--bg);left:.125em;font-size:32px}@media only screen and (max-width:720px){textarea,select,input{width:100%}}input[type=color]{height:2.5rem;padding:.2rem}input[type=file]{border:0}hr{border:none;height:1px;background:var(--border);margin:1rem auto}mark{padding:2px 25px;border-radius:var(--standard-border-radius);background-color:var(--marked);color:#fff;white-space:nowrap}mark a,mark a:visited{color:#fff;text-decoration:none}img,video{max-width:100%;height:auto;border-radius:var(--standard-border-radius)}figure{margin:0;display:block;overflow-x:auto}figure>img,figure>picture>img{display:block;margin-inline:auto}figcaption{text-align:center;font-size:.9rem;color:var(--text-light);margin-block:1rem}blockquote{margin-inline-start:2rem;margin-inline-end:0;margin-block:2rem;padding:.4rem .8rem;border-inline-start:.35rem solid var(--accent);color:var(--text-light);font-style:italic}cite{font-size:.9rem;color:var(--text-light);font-style:normal}dt{color:var(--text-light)}code,pre,pre span,kbd,samp{font-family:var(--mono-font);color:var(--code)}kbd{color:var(--preformatted);border:1px solid var(--preformatted);border-bottom:3px solid var(--preformatted);border-radius:var(--standard-border-radius);padding:.1rem .4rem}pre{padding:1rem 1.4rem;max-width:100%;overflow:auto;color:var(--preformatted)}pre code{color:var(--preformatted);background:0 0;margin:0;padding:0}progress{width:100%}progress:indeterminate{background-color:var(--accent-bg)}progress::-webkit-progress-bar{border-radius:var(--standard-border-radius);background-color:var(--accent-bg)}progress::-webkit-progress-value{border-radius:var(--standard-border-radius);background-color:var(--accent)}progress::-moz-progress-bar{border-radius:var(--standard-border-radius);background-color:var(--accent);transition-property:width;transition-duration:.3s}progress:indeterminate::-moz-progress-bar{background-color:var(--accent-bg)}dialog{max-width:40rem;margin:auto}dialog::backdrop{background-color:var(--bg);opacity:.8}@media only screen and (max-width:720px){dialog{max-width:100%;margin:auto 1em}}sup,sub{vertical-align:baseline;position:relative}sup{top:-.4em}sub{top:.3em}.notice{background:var(--accent-bg);border:2px solid var(--border);border-radius:var(--standard-border-radius);padding:1.5rem;margin:2rem 0}.larger{font-size:2rem;font-weight:700}.danger{color:var(--danger)}.mt-0{margin-top:0}.mt-1{margin-top:.5em}.mt-2{margin-top:1em}.mt-4{margin-top:2em}.mt-6{margin-top:3em}.mb-0{margin-bottom:0}.mb-4{margin-bottom:2em}.ml-1{margin-left:.5em}.ml-2{margin-left:1em}ul.no-bullet{list-style-type:none}.accent{background-image:linear-gradient(to right,red,orange,yellow,green,blue,indigo,violet);height:.5em}.button.outlined{background-color:transparent;color:var(--accent)}.button.outlined:hover{background-color:var(--accent);color:#fff}.is-pulled-right{float:right}.invalid-feedback,.empty-feedback{display:none}.was-validated :placeholder-shown:invalid~.empty-feedback{display:block}.was-validated :not(:placeholder-shown):invalid~.invalid-feedback{display:block}.is-invalid,.was-validated :invalid{border-color:#dc3545}.breadcrumb{font-size:1rem;white-space:nowrap}.breadcrumb a{align-items:center;color:#19196e;display:flex;justify-content:center;padding:0 .75em}.breadcrumb a:hover{color:hsl(0deg,0%,21%)}.breadcrumb li{align-items:center;display:flex}.breadcrumb li:first-child a{padding-left:0}.breadcrumb li.is-active a{color:hsl(0deg,0%,21%);cursor:default;pointer-events:none}.breadcrumb li+li::before{color:#19196e;content:"/"}.breadcrumb ul,.breadcrumb ol{align-items:flex-start;display:flex;flex-wrap:wrap;justify-content:flex-start}.breadcrumb .icon:first-child{margin-right:.5em}.breadcrumb .icon:last-child{margin-left:.5em}.breadcrumb.is-centered ol,.breadcrumb.is-centered ul{justify-content:center}.breadcrumb.is-right ol,.breadcrumb.is-right ul{justify-content:flex-end}.breadcrumb.is-small{font-size:.75rem}.breadcrumb.is-medium{font-size:1.25rem}.breadcrumb.is-large{font-size:1.5rem}.breadcrumb.has-arrow-separator li+li::before{content:"→"}.breadcrumb.has-bullet-separator li+li::before{content:"•"}.breadcrumb.has-dot-separator li+li::before{content:"·"}.breadcrumb.has-succeeds-separator li+li::before{content:"≻"}.book-grid{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;grid-gap:1.5em}.three-col{display:grid;grid-template-columns:1fr 1fr 1fr;grid-gap:1em}.two-col{display:grid;grid-template-columns:1fr 2fr;grid-gap:1em}.book-box{border:1px solid var(--border)}.book-box h3{font-size:1.1em;margin:.5em}.book-box img{margin:0 auto}.book-summary{display:grid;grid-template-columns:32% auto;grid-gap:2em;border:1px solid var(--border);padding:1em}.blog-page{display:grid;grid-template-columns:65% auto;grid-gap:2em;margin:0 auto}.sidebar{border:1px solid var(--border);padding:1em}.sidebar h2{margin-top:0;border-bottom:2px solid #006;font-size:1.25em}.sidebar ul{list-style-type:none;margin-block-start:0;padding-inline-start:.5em}.sidebar ul li{margin-top:.25em}.sidebar a{font-weight:700}form{display:grid;grid-template-columns:100px auto;grid-gap:1em}.book-box img,.zoom-img{transition:all .3s ease-in-out}.book-box 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