/*! normalize.css v3.0.2 | MIT License | git.io/normalize */@import url("https://fonts.googleapis.com/css?family=Open+Sans:400,700&display=swap");html{font-family:sans-serif;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{margin:0}article,aside,details,figcaption,figure,footer,header,hgroup,main,menu,nav,section,summary{display:block}audio,canvas,progress,video{display:inline-block;vertical-align:baseline}audio:not([controls]){display:none;height:0}[hidden],template{display:none}a{background-color:transparent}a:active,a:hover{outline:0}abbr[title]{border-bottom:1px dotted}b,strong{font-weight:bold}dfn{font-style:italic}h1{font-size:2em;margin:0.67em 0}mark{background:#ff0;color:#000}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sup{top:-0.5em}sub{bottom:-0.25em}img{border:0}svg:not(:root){overflow:hidden}figure{margin:1em 40px}hr{box-sizing:content-box;height:0}pre{overflow:auto}code,kbd,pre,samp{font-family:monospace, monospace;font-size:1em}button,input,optgroup,select,textarea{color:inherit;font:inherit;margin:0}button{overflow:visible}button,select{text-transform:none}button,html input[type="button"],input[type="reset"],input[type="submit"]{-webkit-appearance:button;cursor:pointer}button[disabled],html input[disabled]{cursor:default}button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}input{line-height:normal}input[type="checkbox"],input[type="radio"]{box-sizing:border-box;padding:0}input[type="number"]::-webkit-inner-spin-button,input[type="number"]::-webkit-outer-spin-button{height:auto}input[type="search"]{-webkit-appearance:textfield;box-sizing:content-box}input[type="search"]::-webkit-search-cancel-button,input[type="search"]::-webkit-search-decoration{-webkit-appearance:none}fieldset{border:1px solid #c0c0c0;margin:0 2px;padding:0.35em 0.625em 0.75em}legend{border:0;padding:0}textarea{overflow:auto}optgroup{font-weight:bold}table{border-collapse:collapse;border-spacing:0}td,th{padding:0}.highlight table td{padding:5px}.highlight table pre{margin:0}.highlight .cm{color:#999988;font-style:italic}.highlight .cp{color:#999999;font-weight:bold}.highlight .c1{color:#999988;font-style:italic}.highlight .cs{color:#999999;font-weight:bold;font-style:italic}.highlight .c,.highlight .cd{color:#999988;font-style:italic}.highlight .err{color:#a61717;background-color:#e3d2d2}.highlight .gd{color:#000000;background-color:#ffdddd}.highlight .ge{color:#000000;font-style:italic}.highlight .gr{color:#aa0000}.highlight .gh{color:#999999}.highlight .gi{color:#000000;background-color:#ddffdd}.highlight .go{color:#888888}.highlight .gp{color:#555555}.highlight .gs{font-weight:bold}.highlight .gu{color:#aaaaaa}.highlight .gt{color:#aa0000}.highlight .kc{color:#000000;font-weight:bold}.highlight .kd{color:#000000;font-weight:bold}.highlight .kn{color:#000000;font-weight:bold}.highlight .kp{color:#000000;font-weight:bold}.highlight .kr{color:#000000;font-weight:bold}.highlight .kt{color:#445588;font-weight:bold}.highlight .k,.highlight .kv{color:#000000;font-weight:bold}.highlight .mf{color:#009999}.highlight .mh{color:#009999}.highlight .il{color:#009999}.highlight .mi{color:#009999}.highlight .mo{color:#009999}.highlight .m,.highlight .mb,.highlight .mx{color:#009999}.highlight .sb{color:#d14}.highlight .sc{color:#d14}.highlight .sd{color:#d14}.highlight .s2{color:#d14}.highlight .se{color:#d14}.highlight .sh{color:#d14}.highlight .si{color:#d14}.highlight .sx{color:#d14}.highlight .sr{color:#009926}.highlight .s1{color:#d14}.highlight .ss{color:#990073}.highlight .s{color:#d14}.highlight .na{color:#008080}.highlight .bp{color:#999999}.highlight .nb{color:#0086B3}.highlight .nc{color:#445588;font-weight:bold}.highlight .no{color:#008080}.highlight .nd{color:#3c5d5d;font-weight:bold}.highlight .ni{color:#800080}.highlight .ne{color:#990000;font-weight:bold}.highlight .nf{color:#990000;font-weight:bold}.highlight .nl{color:#990000;font-weight:bold}.highlight .nn{color:#555555}.highlight .nt{color:#000080}.highlight .vc{color:#008080}.highlight .vg{color:#008080}.highlight .vi{color:#008080}.highlight .nv{color:#008080}.highlight .ow{color:#000000;font-weight:bold}.highlight .o{color:#000000;font-weight:bold}.highlight .w{color:#bbbbbb}.highlight{background-color:#f8f8f8}*{box-sizing:border-box}body{padding:0;margin:0;font-family:"Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;font-size:16px;line-height:1.5;color:#606c71}#skip-to-content{height:1px;width:1px;position:absolute;overflow:hidden;top:-10px}#skip-to-content:focus{position:fixed;top:10px;left:10px;height:auto;width:auto;background:#e19447;outline:thick solid #e19447}a{color:#1e6bb8;text-decoration:none}a:hover{text-decoration:underline}.btn{display:inline-block;margin-bottom:1rem;color:rgba(255,255,255,0.7);background-color:rgba(255,255,255,0.08);border-color:rgba(255,255,255,0.2);border-style:solid;border-width:1px;border-radius:0.3rem;transition:color 0.2s, background-color 0.2s, border-color 0.2s}.btn:hover{color:rgba(255,255,255,0.8);text-decoration:none;background-color:rgba(255,255,255,0.2);border-color:rgba(255,255,255,0.3)}.btn+.btn{margin-left:1rem}@media screen and (min-width: 64em){.btn{padding:0.75rem 1rem}}@media screen and (min-width: 42em) and (max-width: 64em){.btn{padding:0.6rem 0.9rem;font-size:0.9rem}}@media screen and (max-width: 42em){.btn{display:block;width:100%;padding:0.75rem;font-size:0.9rem}.btn+.btn{margin-top:1rem;margin-left:0}}.page-header{color:#fff;text-align:center;background-color:#159957;background-image:linear-gradient(120deg, #155799, #159957)}@media screen and (min-width: 64em){.page-header{padding:5rem 6rem}}@media screen and (min-width: 42em) and (max-width: 64em){.page-header{padding:3rem 4rem}}@media screen and (max-width: 42em){.page-header{padding:2rem 1rem}}.project-name{margin-top:0;margin-bottom:0.1rem}@media screen and (min-width: 64em){.project-name{font-size:3.25rem}}@media screen and (min-width: 42em) and (max-width: 64em){.project-name{font-size:2.25rem}}@media screen and (max-width: 42em){.project-name{font-size:1.75rem}}.project-tagline{margin-bottom:2rem;font-weight:normal;opacity:0.7}@media screen and (min-width: 64em){.project-tagline{font-size:1.25rem}}@media screen and (min-width: 42em) and (max-width: 64em){.project-tagline{font-size:1.15rem}}@media screen and (max-width: 42em){.project-tagline{font-size:1rem}}.main-content{word-wrap:break-word}.main-content :first-child{margin-top:0}@media screen and (min-width: 64em){.main-content{max-width:64rem;padding:2rem 6rem;margin:0 auto;font-size:1.1rem}}@media screen and (min-width: 42em) and (max-width: 64em){.main-content{padding:2rem 4rem;font-size:1.1rem}}@media screen and (max-width: 42em){.main-content{padding:2rem 1rem;font-size:1rem}}.main-content kbd{background-color:#fafbfc;border:1px solid #c6cbd1;border-bottom-color:#959da5;border-radius:3px;box-shadow:inset 0 -1px 0 #959da5;color:#444d56;display:inline-block;font-size:11px;line-height:10px;padding:3px 5px;vertical-align:middle}.main-content img{max-width:100%}.main-content h1,.main-content h2,.main-content h3,.main-content h4,.main-content h5,.main-content h6{margin-top:2rem;margin-bottom:1rem;font-weight:normal;color:#159957}.main-content p{margin-bottom:1em}.main-content code{padding:2px 4px;font-family:Consolas, "Liberation Mono", Menlo, Courier, monospace;font-size:0.9rem;color:#567482;background-color:#f3f6fa;border-radius:0.3rem}.main-content pre{padding:0.8rem;margin-top:0;margin-bottom:1rem;font:1rem Consolas, "Liberation Mono", Menlo, Courier, monospace;color:#567482;word-wrap:normal;background-color:#f3f6fa;border:solid 1px #dce6f0;border-radius:0.3rem}.main-content pre>code{padding:0;margin:0;font-size:0.9rem;color:#567482;word-break:normal;white-space:pre;background:transparent;border:0}.main-content .highlight{margin-bottom:1rem}.main-content .highlight pre{margin-bottom:0;word-break:normal}.main-content .highlight pre,.main-content pre{padding:0.8rem;overflow:auto;font-size:0.9rem;line-height:1.45;border-radius:0.3rem;-webkit-overflow-scrolling:touch}.main-content pre code,.main-content pre tt{display:inline;max-width:initial;padding:0;margin:0;overflow:initial;line-height:inherit;word-wrap:normal;background-color:transparent;border:0}.main-content pre code:before,.main-content pre code:after,.main-content pre tt:before,.main-content pre tt:after{content:normal}.main-content ul,.main-content ol{margin-top:0}.main-content blockquote{padding:0 1rem;margin-left:0;color:#819198;border-left:0.3rem solid #dce6f0}.main-content blockquote>:first-child{margin-top:0}.main-content blockquote>:last-child{margin-bottom:0}.main-content table{display:block;width:100%;overflow:auto;word-break:normal;word-break:keep-all;-webkit-overflow-scrolling:touch}.main-content table th{font-weight:bold}.main-content table th,.main-content table td{padding:0.5rem 1rem;border:1px solid #e9ebec}.main-content dl{padding:0}.main-content dl dt{padding:0;margin-top:1rem;font-size:1rem;font-weight:bold}.main-content dl dd{padding:0;margin-bottom:1rem}.main-content hr{height:2px;padding:0;margin:1rem 0;background-color:#eff0f1;border:0}.site-footer{padding-top:2rem;margin-top:2rem;border-top:solid 1px #eff0f1}@media screen and (min-width: 64em){.site-footer{font-size:1rem}}@media screen and (min-width: 42em) and (max-width: 64em){.site-footer{font-size:1rem}}@media screen and (max-width: 42em){.site-footer{font-size:0.9rem}}.site-footer-owner{display:block;font-weight:bold}.site-footer-credits{color:#819198}:root{--sidebar-width: 260px;--header-bg: #157878;--header-bg2: #155799}@media (prefers-color-scheme: dark){body.dark-mode-auto,body:not(.light-mode-manual){--bg: #0d1117;--bg-secondary: #161b22;--text: #c9d1d9;--text-secondary: #8b949e;--border: #30363d;--link: #58a6ff;--code-bg: #1c2128;--header-bg: #0d1117;--header-bg2: #0d1117;--sidebar-bg: #161b22;--sidebar-hover: #1c2128;--sidebar-active: #1f6feb33;--table-stripe: #161b22}}body.dark-mode-manual{--bg: #0d1117;--bg-secondary: #161b22;--text: #c9d1d9;--text-secondary: #8b949e;--border: #30363d;--link: #58a6ff;--code-bg: #1c2128;--header-bg: #0d1117;--header-bg2: #0d1117;--sidebar-bg: #161b22;--sidebar-hover: #1c2128;--sidebar-active: #1f6feb33;--table-stripe: #161b22}@media (prefers-color-scheme: light){body:not(.dark-mode-manual){--bg: #fff;--bg-secondary: #f6f8fa;--text: #24292e;--text-secondary: #586069;--border: #e1e4e8;--link: #0366d6;--code-bg: #f6f8fa;--sidebar-bg: #f6f8fa;--sidebar-hover: #e8eaed;--sidebar-active: #0366d610;--table-stripe: #f6f8fa}}body.light-mode-manual{--bg: #fff;--bg-secondary: #f6f8fa;--text: #24292e;--text-secondary: #586069;--border: #e1e4e8;--link: #0366d6;--code-bg: #f6f8fa;--sidebar-bg: #f6f8fa;--sidebar-hover: #e8eaed;--sidebar-active: #0366d610;--table-stripe: #f6f8fa}body{background:var(--bg);color:var(--text)}#reading-progress{position:fixed;top:0;left:0;height:3px;background:linear-gradient(90deg, #157878, #58a6ff);z-index:10000;width:0;transition:width 0.1s linear}.theme-toggle{position:fixed;top:12px;right:16px;z-index:9999;width:36px;height:36px;border:none;border-radius:50%;background:rgba(128,128,128,0.2);color:#fff;font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background 0.2s, transform 0.2s;backdrop-filter:blur(4px)}.theme-toggle:hover{background:rgba(128,128,128,0.4);transform:scale(1.1)}.sidebar-toggle{display:none;position:fixed;top:12px;left:12px;z-index:9998;width:36px;height:36px;border:none;border-radius:6px;background:rgba(128,128,128,0.2);color:#fff;font-size:20px;cursor:pointer;backdrop-filter:blur(4px)}.sidebar-overlay{display:none;position:fixed;inset:0;z-index:9996;background:rgba(0,0,0,0.4);backdrop-filter:blur(2px)}.sidebar{position:fixed;top:0;left:0;width:var(--sidebar-width);height:100vh;background:var(--sidebar-bg, #f6f8fa);border-right:1px solid var(--border, #e1e4e8);z-index:9997;overflow-y:auto;overflow-x:hidden;transform:translateX(0);transition:transform 0.3s ease;scrollbar-width:thin}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-thumb{background:var(--text-secondary, #8b949e);border-radius:2px}.sidebar-header{padding:18px 16px 10px;border-bottom:1px solid var(--border, #e1e4e8)}.sidebar-title{font-size:16px;font-weight:700;color:var(--text, #24292e);text-decoration:none;display:block}.sidebar-title:hover{color:#0366d6}.sidebar-toc{padding:8px 0 40px}.toc-section{margin-bottom:4px}.toc-heading{padding:10px 16px 4px;font-size:12px;font-weight:600;color:var(--text-secondary, #586069);text-transform:none;letter-spacing:0.5px}.toc-section a{display:block;padding:6px 16px 6px 22px;font-size:13px;color:var(--text, #24292e);text-decoration:none;border-left:2px solid transparent;transition:background 0.15s, border-color 0.15s}.toc-section a:hover{background:var(--sidebar-hover, #e8eaed);border-left-color:#0366d6}.toc-section a.active{background:var(--sidebar-active, #0366d610);border-left-color:#0366d6;color:#0366d6;font-weight:600}.page-wrapper{margin-left:var(--sidebar-width);transition:margin-left 0.3s ease}.breadcrumb{font-size:13px;padding:8px 0 16px;color:var(--text-secondary, #586069);border-bottom:1px solid var(--border, #e1e4e8);margin-bottom:24px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.breadcrumb a{color:var(--link, #0366d6);text-decoration:none}.breadcrumb a:hover{text-decoration:underline}.breadcrumb .sep{margin:0 6px;color:var(--text-secondary, #8b949e)}.breadcrumb .current{color:var(--text, #24292e);font-weight:600}.back-to-top{position:fixed;bottom:24px;right:24px;width:40px;height:40px;border:none;border-radius:50%;background:#157878;color:#fff;font-size:20px;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity 0.25s, visibility 0.25s, transform 0.25s, background 0.2s;z-index:9990;box-shadow:0 2px 8px rgba(0,0,0,0.2);display:flex;align-items:center;justify-content:center}.back-to-top:hover{background:#0e5f5f}.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}.search-wrapper{max-width:64rem;margin:0 auto;padding:0 1rem 8px;position:relative}#search-input{width:100%;box-sizing:border-box;padding:10px 16px;font-size:15px;border:1px solid rgba(255,255,255,0.6);border-radius:6px;background:rgba(255,255,255,0.2);color:#fff;outline:none;transition:border-color 0.2s, background 0.2s}#search-input::placeholder{color:rgba(255,255,255,0.85)}#search-input:focus{border-color:#fff;background:rgba(255,255,255,0.3);box-shadow:0 0 0 3px rgba(255,255,255,0.15)}#search-results{display:none;position:absolute;left:1rem;right:1rem;top:48px;z-index:100;list-style:none;margin:0;padding:0;background:#fff;border:1px solid #ddd;border-radius:6px;box-shadow:0 4px 16px rgba(0,0,0,0.15);max-height:380px;overflow-y:auto}#search-results.show{display:block}#search-results li{margin:0;border-bottom:1px solid #eee}#search-results li:last-child{border-bottom:none}#search-results a{display:block;padding:10px 16px;color:#24292e;text-decoration:none;font-size:14px;line-height:1.5}#search-results a:hover,#search-results a:focus{background:#f6f8fa}#search-results .search-hit{font-weight:500;color:#0366d6}#search-results .search-empty{padding:14px 16px;color:#586069;font-size:14px;text-align:center}body.dark-mode-manual .page-header,body.dark-mode-auto .page-header{background:linear-gradient(120deg, var(--header-bg) 0%, #1a2332 100%);border-bottom:1px solid #30363d}body.dark-mode-manual .main-content,body.dark-mode-auto .main-content{background:var(--bg)}body.dark-mode-manual .main-content h1,body.dark-mode-manual .main-content h2,body.dark-mode-manual .main-content h3,body.dark-mode-manual .main-content h4,body.dark-mode-auto .main-content h1,body.dark-mode-auto .main-content h2,body.dark-mode-auto .main-content h3,body.dark-mode-auto .main-content h4{color:var(--text)}body.dark-mode-manual .main-content p,body.dark-mode-manual .main-content li,body.dark-mode-auto .main-content p,body.dark-mode-auto .main-content li{color:var(--text)}body.dark-mode-manual .main-content a,body.dark-mode-auto .main-content a{color:var(--link)}body.dark-mode-manual .main-content code,body.dark-mode-auto .main-content code{background:var(--code-bg);color:#c9d1d9}body.dark-mode-manual .main-content pre,body.dark-mode-auto .main-content pre{background:var(--code-bg)}body.dark-mode-manual .main-content table,body.dark-mode-auto .main-content table{border-color:var(--border)}body.dark-mode-manual .main-content th,body.dark-mode-auto .main-content th{background:var(--bg-secondary);color:var(--text);border-color:var(--border)}body.dark-mode-manual .main-content td,body.dark-mode-auto .main-content td{border-color:var(--border);color:var(--text)}body.dark-mode-manual .main-content tr:nth-child(even),body.dark-mode-auto .main-content tr:nth-child(even){background:var(--table-stripe)}body.dark-mode-manual .main-content hr,body.dark-mode-auto .main-content hr{border-color:var(--border)}body.dark-mode-manual .main-content blockquote,body.dark-mode-auto .main-content blockquote{border-left-color:#30363d;color:var(--text-secondary)}body.dark-mode-manual .site-footer,body.dark-mode-auto .site-footer{border-top-color:var(--border);color:var(--text-secondary)}body.dark-mode-manual .site-footer a,body.dark-mode-auto .site-footer a{color:var(--link)}body.dark-mode-manual .sidebar,body.dark-mode-auto .sidebar{background:var(--sidebar-bg, #161b22);border-right-color:var(--border, #30363d)}body.dark-mode-manual .sidebar-title,body.dark-mode-auto .sidebar-title{color:var(--text, #c9d1d9)}body.dark-mode-manual .sidebar-header,body.dark-mode-auto .sidebar-header{border-bottom-color:var(--border, #30363d)}body.dark-mode-manual .toc-section a,body.dark-mode-auto .toc-section a{color:var(--text, #c9d1d9)}body.dark-mode-manual .toc-section a:hover,body.dark-mode-auto .toc-section a:hover{background:var(--sidebar-hover, #1c2128)}@media (max-width: 960px){.sidebar-toggle{display:flex;align-items:center;justify-content:center}.sidebar{transform:translateX(-100%)}.sidebar.open{transform:translateX(0)}.sidebar-overlay.open{display:block}.page-wrapper{margin-left:0}.theme-toggle{top:12px;right:12px}.back-to-top{right:12px;bottom:16px}}@media (min-width: 961px){.sidebar-toggle{display:none}.sidebar{transform:translateX(0) !important}.sidebar-overlay{display:none !important}}