:root{--bg:#f7f7f1;--paper:#fffefa;--text:#1d2936;--muted:#647183;--border:#d9deda;--hair:#e9ede9;--navy:#172e43;--teal:#0e847d;--teal-d:#076e69;--teal-l:#e6f6f2;--amber:#a66b21;--amber-l:#fff4dd;--red:#bd4f47;--red-l:#fff0ec;--blue:#446eaf;--blue-l:#ebf2ff;--purple:#8367bb;--purple-l:#f3effb;--shadow:0 13px 38px rgba(22,45,56,.055);--code:#172837;--codeText:#e7f1f1;--highlight:#e6f1f0}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;font-size:15px;line-height:1.68;letter-spacing:.002em}button,input,textarea,select{font:inherit}button{cursor:pointer}a{color:var(--teal-d);text-decoration:none}a:hover{text-decoration:underline}code,kbd,.mono{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace}code:not(pre code){font-size:.9em;color:#a34852;background:#f2efeb;padding:2px 5px;border-radius:4px}b,strong{font-weight:730}::selection{background:#a7ded6;color:#163336}body.dark{--bg:#0d1925;--paper:#142533;--text:#e2edf0;--muted:#9db0b6;--border:#35505a;--hair:#293e47;--navy:#cde7e8;--teal:#61c7b7;--teal-d:#8ce4d5;--teal-l:#183d3e;--amber:#efb868;--amber-l:#483b27;--red:#f19282;--red-l:#4b2d2f;--blue:#93b9f1;--blue-l:#293d5c;--purple:#b9a7e9;--purple-l:#37314f;--shadow:0 13px 38px rgba(0,0,0,.18);--code:#0a141e;--highlight:#2a4e51}body.dark code:not(pre code){color:#ffabb0;background:#2e3036}#app-shell{min-height:100vh}.layout{display:grid;grid-template-columns:260px minmax(0,1fr);max-width:1560px;margin:auto;gap:0}.aside{border-right:1px solid var(--border);padding:28px 16px 20px 21px;background:var(--paper);height:100vh;position:sticky;top:0;display:flex;flex-direction:column;overflow:auto;z-index:8}.mark{display:flex;gap:10px;align-items:center;padding:5px 8px 20px;border-bottom:1px solid var(--hair)}.mark-icon{width:39px;height:39px;background:var(--navy);color:var(--paper);border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:850;line-height:1;letter-spacing:-2px}.mark strong{font-size:13px;display:block;color:var(--text);line-height:1.15}.mark small{display:block;font-size:11px;color:var(--muted);margin-top:4px}.aside-label{text-transform:uppercase;font-size:10px;font-weight:800;letter-spacing:.14em;color:var(--muted);padding:20px 12px 9px}.toc{display:flex;flex-direction:column;gap:4px}.toc a{display:flex;gap:11px;align-items:center;border-radius:8px;padding:9px 10px;color:var(--muted);font-size:12.5px;line-height:1.25;transition:.16s;position:relative}.toc a:hover{background:var(--bg);color:var(--text);text-decoration:none}.toc a.active{background:var(--teal-l);color:var(--teal-d);font-weight:750}.toc-n{font-family:monospace;font-size:11px;color:var(--teal);width:20px;flex:none}.aside-bottom{margin-top:auto;border-top:1px solid var(--hair);padding:17px 6px 0}.progress-meta{display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}.progress-track{height:5px;border-radius:100px;background:var(--hair);overflow:hidden;margin-top:9px}.progress-fill{height:100%;background:var(--teal);width:0;transition:.2s}.aside-bottom p{font-size:11px;color:var(--muted);line-height:1.5;margin:13px 0 0}.topbar{position:sticky;top:0;z-index:7;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);background:color-mix(in srgb,var(--bg) 91%,transparent);border-bottom:1px solid var(--hair);display:flex;align-items:center;justify-content:space-between;padding:11px clamp(24px,6vw,78px)}.crumb{color:var(--muted);font-size:12px}.crumb strong{color:var(--text)}.top-actions{display:flex;gap:7px;align-items:center}.icon-button,.mini-btn,.btn,.switch-button{border:1px solid var(--border);background:var(--paper);color:var(--text);border-radius:8px;display:inline-flex;gap:7px;align-items:center;justify-content:center;transition:.15s;min-height:32px;padding:6px 10px;font-size:12px;font-weight:650}.icon-button:hover,.mini-btn:hover,.btn:hover{border-color:var(--teal);transform:translateY(-1px)}.btn.primary{background:var(--teal);border-color:var(--teal);color:#fff}.btn.soft{background:var(--teal-l);border-color:transparent;color:var(--teal-d)}.btn.danger{background:var(--red-l);border-color:transparent;color:var(--red)}.btn[disabled]{opacity:.43;cursor:not-allowed;transform:none}.page{width:min(980px,calc(100% - 48px));margin:0 auto;padding-bottom:100px}.hero{padding:67px 0 38px;position:relative;overflow:hidden;min-height:340px}.hero:after{content:"";position:absolute;width:350px;height:350px;right:6%;top:-55px;border-radius:50%;background:none;opacity:.48;pointer-events:none;-webkit-mask-image:none;mask-image:none}.hero:before{content:"</>";position:absolute;right:7%;top:100px;font-family:Consolas,monospace;font-size:132px;font-weight:900;color:var(--teal);opacity:.1;transform:rotate(-8deg);pointer-events:none}.eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:.17em;font-weight:850;color:var(--teal-d);display:inline-flex;align-items:center;gap:10px}.eyebrow:before{content:"";width:22px;height:2px;background:var(--teal)}h1,h2,h3,h4,p{margin-top:0}h1{font-weight:850;font-size:clamp(36px,5vw,59px);line-height:1.1;letter-spacing:-.052em;max-width:780px;margin:18px 0;color:var(--navy)}h1 span{color:var(--teal)}.lead{max-width:680px;color:var(--muted);font-size:16px;line-height:1.75}.hero-stats{display:flex;gap:22px;flex-wrap:wrap;align-items:center;margin-top:27px}.stat{display:flex;flex-direction:column;min-width:100px;border-left:2px solid var(--border);padding-left:13px}.stat b{font-size:19px;line-height:1.2;letter-spacing:-.03em;color:var(--navy)}.stat span{font-size:11px;color:var(--muted)}.intro-brief{display:grid;grid-template-columns:1fr 1fr;gap:15px;padding-bottom:8px}.brief{border:1px solid var(--border);background:var(--paper);border-radius:13px;padding:18px 20px;box-shadow:var(--shadow)}.brief-label{font-size:10px;letter-spacing:.13em;font-weight:850;text-transform:uppercase;color:var(--teal-d);margin-bottom:8px}.brief p{font-size:13px;margin-bottom:0;color:var(--muted)}.brief strong{color:var(--text)}.section{padding-top:80px;scroll-margin-top:30px}.section-header{padding-bottom:21px;border-bottom:1px solid var(--border);margin-bottom:27px;display:flex;align-items:flex-start;gap:18px}.secno{width:43px;height:43px;border-radius:12px;flex:none;background:var(--navy);color:var(--paper);display:flex;justify-content:center;align-items:center;font-family:Consolas,monospace;font-weight:800;font-size:13px}.section h2{font-size:clamp(24px,3.3vw,34px);letter-spacing:-.045em;line-height:1.2;color:var(--navy);margin:0 0 5px}.subtitle{font-size:13px;color:var(--muted);margin:0}.section h3{font-size:19px;letter-spacing:-.025em;margin:28px 0 13px;color:var(--navy);line-height:1.3}.section h4{font-size:14px;margin:17px 0 9px;color:var(--navy)}.section>p,.section>.explain{max-width:790px}.section p{margin-bottom:13px}.muted{color:var(--muted)}.small{font-size:12px}.micro{font-size:11px}.caps{font-size:10px;letter-spacing:.14em;font-weight:850;text-transform:uppercase;color:var(--muted)}.key{font-weight:750;color:var(--teal-d)}.math{font-family:Georgia,Times New Roman,serif;font-style:italic;font-size:1.08em}.sup{vertical-align:super;font-size:.68em}.card{border:1px solid var(--border);background:var(--paper);border-radius:13px;padding:18px 21px;box-shadow:var(--shadow);margin:18px 0}.card.tight{padding:14px 16px}.card-head{display:flex;align-items:center;justify-content:space-between;gap:13px;margin-bottom:13px}.card-head h3,.card-head h4{margin:0}.card-title{font-size:14px;font-weight:760;color:var(--navy)}.caption{font-size:11px;color:var(--muted);line-height:1.55}.tag{border-radius:5px;padding:3px 8px;font-size:10px;font-weight:790;letter-spacing:.03em;border:1px solid var(--border);color:var(--muted);white-space:nowrap}.tag.teal{background:var(--teal-l);color:var(--teal-d);border-color:transparent}.tag.red{background:var(--red-l);color:var(--red);border-color:transparent}.tag.blue{background:var(--blue-l);color:var(--blue);border-color:transparent}.tag.amber{background:var(--amber-l);color:var(--amber);border-color:transparent}.columns{display:grid;grid-template-columns:1fr 1fr;gap:16px}.columns.three{grid-template-columns:repeat(3,1fr)}.flex{display:flex;align-items:center;gap:10px}.between{justify-content:space-between}.callout{display:flex;gap:13px;align-items:flex-start;padding:14px 16px;border:1px solid var(--border);border-left:3px solid var(--teal);border-radius:9px;background:var(--teal-l);margin:16px 0}.callout strong{display:block;font-size:12px;margin:0 0 3px}.callout p{margin:0;font-size:12px}.callout .sign{font-size:17px;line-height:1.1;color:var(--teal-d);font-weight:800}.callout.warn{background:var(--amber-l);border-left-color:var(--amber)}.callout.warn .sign{color:var(--amber)}.callout.danger{background:var(--red-l);border-left-color:var(--red)}.callout.danger .sign{color:var(--red)}.callout.blue{background:var(--blue-l);border-left-color:var(--blue)}.callout.blue .sign{color:var(--blue)}.tooltip-wrap{display:inline-flex;vertical-align:middle;position:relative;margin:0 2px}.info-button{width:19px;height:19px;border-radius:50%;border:1px solid var(--teal);background:var(--teal-l);color:var(--teal-d);font-family:Georgia,serif;font-size:12px;font-weight:800;line-height:1;display:inline-flex;align-items:center;justify-content:center;padding:0;cursor:help}.tooltip-pop{position:absolute;left:50%;bottom:calc(100% + 10px);transform:translate(-50%) translateY(3px);width:min(300px,70vw);padding:12px 14px;border:1px solid var(--border);background:var(--paper);border-radius:9px;box-shadow:0 18px 48px #0c1c283b;z-index:11;color:var(--text);font-size:12px;line-height:1.55;opacity:0;visibility:hidden;pointer-events:none;transition:.17s;text-align:left;font-weight:450}.tooltip-pop:after{content:"";position:absolute;bottom:-6px;left:calc(50% - 5px);width:10px;height:10px;background:var(--paper);border-right:1px solid var(--border);border-bottom:1px solid var(--border);transform:rotate(45deg)}.tooltip-wrap:hover .tooltip-pop,.tooltip-wrap:focus-within .tooltip-pop,.tooltip-wrap.open .tooltip-pop{visibility:visible;opacity:1;transform:translate(-50%) translateY(0);pointer-events:auto}.tooltip-pop strong{font-weight:760;color:var(--navy)}.table-wrap{border:1px solid var(--border);border-radius:12px;overflow:auto;background:var(--paper);margin:16px 0}.data-table{width:100%;border-collapse:collapse;font-size:12.5px;min-width:510px}.data-table th{text-align:left;background:var(--bg);font-size:10px;font-weight:790;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:11px 14px;white-space:nowrap}.data-table td{padding:11px 14px;border-top:1px solid var(--hair);vertical-align:top}.data-table tbody tr:hover{background:var(--teal-l)}.data-table .mono{color:var(--teal-d);font-weight:700;white-space:nowrap}.row-note{color:var(--muted);font-size:11px}.timeline{display:grid;grid-template-columns:repeat(7,1fr);gap:5px;margin:22px 0 9px;position:relative}.timeline:before{content:"";position:absolute;top:18px;left:2%;right:2%;height:2px;background:var(--border);z-index:0}.time-item{position:relative;z-index:1;text-align:center}.time-dot{height:37px;width:37px;margin:auto;background:var(--paper);border:2px solid var(--border);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:800;color:var(--muted)}.time-item.critical .time-dot{color:#fff;background:var(--teal);border-color:var(--teal);box-shadow:0 0 0 6px var(--teal-l)}.time-label{font-size:11px;font-weight:800;color:var(--navy);padding-top:10px}.time-note{font-size:10px;line-height:1.3;color:var(--muted);padding-top:2px}.ancestor{display:flex;gap:20px;align-items:center;justify-content:center;min-height:180px;background:transparent;border:1px solid var(--border);border-radius:12px;padding:25px}.bubble{border-radius:50%;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:3px;text-align:center;border:2px solid var(--teal);color:var(--teal-d);font-weight:830}.bubble.small{width:100px;height:100px;background:var(--paper)}.bubble.big{width:210px;height:160px;border-radius:100px;background:var(--teal-l);font-size:19px}.bubble span{font-size:10px;color:var(--muted);font-weight:500}.arrow{color:var(--teal);font-size:24px;font-weight:900}.code-card{background:var(--code);border-radius:11px;overflow:hidden;margin:16px 0;box-shadow:0 6px 25px #0d182114}.code-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #334450;padding:10px 15px;font-size:10px;color:#9eb5c0}.code-top-left{display:flex;align-items:center;gap:9px}.code-lights{display:flex;gap:4px}.code-lights i{display:block;height:7px;width:7px;border-radius:50%;background:#8b6871}.code-lights i:nth-child(2){background:#ad9b58}.code-lights i:nth-child(3){background:#578f79}.code-actions{display:flex;gap:8px}.code-actions button{background:transparent;border:1px solid #52606e;border-radius:5px;padding:3px 8px;color:#b5cbd2;font-size:10px}.code-actions button:hover{border-color:#8abbb6;color:#fff}.code-card pre{margin:0;padding:16px 18px;overflow-x:auto;-moz-tab-size:4;tab-size:4;font-size:12.5px;line-height:1.8;color:var(--codeText)}.code-card .language-cpp .token.comment{color:#829ba4}.code-card .token.keyword,.code-card .token.boolean{color:#ff9a90}.code-card .token.number{color:#93cdd1}.code-card .token.string,.code-card .token.char{color:#d9c58d}.code-card .token.class-name{color:#a5d5a4}.code-card .token.function{color:#a5bee8}.code-card .token.operator{color:#d9a9bd}.code-card .token.punctuation{color:#d3e1e6}.code-caption{font-size:11px;color:#9ab1be;padding:9px 17px 13px;border-top:1px solid #334450}.code-result{padding:11px 17px;font-size:11px;color:#bfe6df;background:#193b40;border-top:1px solid #2d6162}.code-result.error{color:#ffd6be;background:#4d3033}.code-result span{display:block;margin-bottom:3px;color:#8bb9b6;font-size:10px;font-weight:750;letter-spacing:.09em;text-transform:uppercase}.slots{display:flex;flex-wrap:wrap;gap:5px;align-items:center}.slot{width:48px;min-width:39px;height:58px;border:1px solid var(--border);background:var(--paper);border-radius:8px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;transition:.16s}.slot b{font-size:16px;font-family:Consolas,monospace;color:var(--navy);font-weight:800}.slot small{font-size:10px;color:var(--muted);font-family:monospace}.slot.filled{background:var(--teal-l);border-color:#93cfc2}.slot.reserved{border-style:dashed;background:var(--bg)}.slot.null{background:var(--amber-l);border-color:#e3c795}.slot.selected{outline:2px solid var(--teal);outline-offset:2px;transform:translateY(-2px)}.slot.bad{outline:2px solid var(--red);outline-offset:2px}.slots .slot button{width:100%;height:100%;border:0;background:transparent;display:contents}.slot.clickable{cursor:pointer}.slot.clickable:hover{border-color:var(--teal)}.slot-label{font-size:10px;color:var(--muted);margin-bottom:8px}.demo{border:1px solid var(--border);background:var(--paper);border-radius:13px;overflow:hidden;box-shadow:var(--shadow);margin:19px 0}.demo-head{padding:17px 19px;border-bottom:1px solid var(--hair);display:flex;justify-content:space-between;gap:10px;align-items:center}.demo-head strong{font-size:14px;color:var(--navy)}.demo-body{padding:20px}.demo-footer{padding:13px 18px;border-top:1px solid var(--hair);background:var(--bg);font-size:12px;color:var(--muted)}.buttonrow{display:flex;flex-wrap:wrap;gap:7px;margin:13px 0}.statgrid{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.statpill{background:var(--bg);border:1px solid var(--hair);padding:7px 11px;border-radius:8px;font-size:11px;color:var(--muted)}.statpill strong{font-family:Consolas,monospace;font-size:16px;color:var(--navy);margin-right:4px}.form-control{max-width:120px;border:1px solid var(--border);border-radius:7px;background:var(--paper);padding:6px 9px;color:var(--text);font-size:12px;min-height:32px}.notice-inline{background:var(--blue-l);border-radius:8px;color:var(--text);padding:9px 12px;margin-top:11px;font-size:12px}.notice-inline.bad{background:var(--red-l)}.bitrow{display:flex;gap:3px;flex-wrap:nowrap;overflow:auto;margin:12px 0}.bit{min-width:18px;height:30px;border-radius:4px;border:1px solid #7daaa3;background:#def3ec;color:#174d4c;text-align:center;line-height:28px;font-family:monospace;font-size:11px}.bit.sign{background:#fad9d7;border-color:#d7938d;color:#893f38}.bit.exponent{background:#f9e5bf;border-color:#ddb56f;color:#73511b}.bit.mantissa{background:#c9e5f6;border-color:#9bc2df;color:#285d84}.bits-key{display:flex;gap:13px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.bits-key i{display:inline-block;width:10px;height:10px;margin-right:4px;border-radius:2px}.bits-key .sign{background:#f3b5ae}.bits-key .exp{background:#e9c57c}.bits-key .man{background:#aed2ee}.explain-card{border:1px solid var(--hair);border-radius:9px;padding:11px 13px;background:var(--bg)}.rule-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.rule{padding:13px;border:1px solid var(--border);background:var(--paper);border-radius:10px}.rule h4{margin:0 0 4px;font-size:13px}.rule p{font-size:12px;color:var(--muted);margin:0}.compare{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0}.compare .half{border:1px solid var(--border);border-radius:10px;padding:16px;background:var(--paper)}.compare .half.good{border-top:3px solid var(--teal)}.compare .half.bad{border-top:3px solid var(--red)}.compare .half h4{margin:0 0 8px;font-size:12px}.compare .half pre{white-space:pre-wrap;font-size:12px;line-height:1.6;margin:0;color:var(--text)}.bargraph{display:flex;align-items:end;gap:4px;height:148px;padding:5px 2px 0;border-bottom:1px solid var(--border);margin:14px 0}.bar{flex:1;min-width:7px;position:relative;border-radius:4px 4px 0 0;background:var(--teal);opacity:.73;cursor:help}.bar:hover{opacity:1}.bar.spike{background:var(--amber)}.bar:hover:after{content:attr(data-tip);position:absolute;left:50%;transform:translate(-50%);bottom:calc(100% + 5px);background:var(--navy);color:var(--paper);padding:5px 8px;border-radius:5px;white-space:nowrap;font-size:10px;z-index:5}.statstrip{display:flex;gap:13px;flex-wrap:wrap;align-items:center;color:var(--muted);font-size:11px}.statstrip b{color:var(--navy)}.tabs{display:flex;gap:4px;flex-wrap:wrap;margin-bottom:16px}.tab{border:1px solid var(--border);background:var(--paper);border-radius:7px;padding:7px 12px;color:var(--muted);font-size:11px;font-weight:760}.tab.active{background:var(--teal-l);color:var(--teal-d);border-color:#9bccc2}.itemrail{display:flex;justify-content:flex-start;align-items:center;gap:6px;flex-wrap:wrap;min-height:90px;border:1px dashed var(--border);border-radius:11px;padding:13px;background:var(--bg)}.itembox{min-width:49px;height:49px;border:1px solid var(--teal);border-radius:8px;background:var(--teal-l);display:flex;align-items:center;justify-content:center;color:var(--teal-d);font-family:Consolas,monospace;font-size:17px;font-weight:820}.heap-level{display:flex;align-items:center;justify-content:space-around;gap:5px;margin:12px 0}.heap-node{width:42px;height:42px;border-radius:50%;border:2px solid var(--teal);background:var(--teal-l);font-weight:800;font-family:monospace;color:var(--teal-d);display:grid;place-items:center}.assoc-grid{display:flex;gap:8px;flex-wrap:wrap}.kv{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:9px;min-width:85px;overflow:hidden;text-align:center;font-size:13px;font-family:monospace;background:var(--paper)}.kv-key{background:var(--teal-l);padding:8px 14px;color:var(--teal-d);font-weight:800}.kv-val{padding:8px 14px;color:var(--navy)}.set-token{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--teal);color:var(--teal-d);background:var(--teal-l);border-radius:10px;padding:12px 18px;font-family:monospace;font-weight:790}.toggleline{display:flex;align-items:center;gap:9px;margin:13px 0;flex-wrap:wrap}.toggleline label{font-size:12px;color:var(--muted)}.flowchart{display:flex;align-items:center;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 8px;background:var(--bg);border-radius:10px;border:1px solid var(--hair);margin:15px 0}.flowbox{min-width:110px;background:var(--paper);border:1px solid var(--border);padding:11px 15px;border-radius:9px;text-align:center;font-size:13px;font-weight:780;color:var(--navy)}.flowbox small{display:block;font-size:10px;color:var(--muted);font-weight:500}.flowarrow{font-size:22px;font-weight:850;color:var(--teal)}.chalk{font-family:Georgia,serif;font-style:italic;font-size:18px;color:var(--teal-d)}.rule-number{width:23px;height:23px;display:inline-grid;place-items:center;color:var(--teal-d);background:var(--teal-l);border-radius:7px;font-family:monospace;font-size:11px;font-weight:790;margin-right:5px}.section-ending{border-top:1px dashed var(--border);margin-top:20px;padding-top:15px;color:var(--muted);font-size:12px}.stickybar{height:2px;position:fixed;left:0;top:0;background:var(--teal);width:0;z-index:50;transition:width .15s}.footer{border-top:1px solid var(--border);padding:36px 0;font-size:12px;color:var(--muted);margin-top:70px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}.editor{width:100%;min-height:150px;resize:vertical;border:1px solid var(--border);background:var(--code);border-radius:9px;color:#def0eb;padding:14px;line-height:1.65;font:12px/1.65 Consolas,monospace}.lint-result{font-size:12px;display:flex;flex-direction:column;gap:6px;margin-top:10px}.lint-line{padding:8px 10px;border-radius:7px;background:var(--bg);border-left:3px solid var(--blue)}.lint-line.warn{border-left-color:var(--amber);background:var(--amber-l)}.lint-line.bad{border-left-color:var(--red);background:var(--red-l)}.summary-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.summary-card{padding:15px;border:1px solid var(--border);border-radius:10px;background:var(--paper)}.summary-card b{display:block;color:var(--navy);font-size:13px;margin-bottom:5px}.summary-card p{margin:0;font-size:11px;color:var(--muted)}@media(max-width:1120px){.layout{grid-template-columns:225px minmax(0,1fr)}.aside{padding:17px 10px}.page{width:min(920px,calc(100% - 38px))}.topbar{padding:11px 24px}}@media(max-width:820px){.layout{display:block}.aside{position:static;height:auto;padding:9px 15px;display:block;border-right:0;border-bottom:1px solid var(--border)}.mark{padding-bottom:9px;border:0}.aside-label,.toc,.aside-bottom{display:none}.topbar{top:0}.page{width:calc(100% - 32px)}.hero{padding:48px 0 28px;min-height:0}.hero:after{opacity:.23}.hero:before{right:0;opacity:.05}.section{padding-top:60px}.columns.three{grid-template-columns:1fr 1fr}}@media(max-width:550px){.intro-brief,.columns,.columns.three,.compare,.rule-grid,.summary-cards{grid-template-columns:1fr}.section-header{gap:10px}.secno{width:35px;height:35px;border-radius:9px}.section h2{font-size:25px}.timeline{grid-template-columns:repeat(4,1fr);gap:13px}.timeline:before{display:none}.time-dot{width:34px;height:34px}.hero-stats{gap:12px}.code-card pre{font-size:11px}.demo-body{padding:15px}.slot{width:42px;height:52px}.ancestor{gap:10px;padding:10px}.bubble.big{width:148px;height:125px;font-size:16px}.bubble.small{width:80px;height:80px}.flowbox{min-width:88px}.hero{padding-top:38px}.topbar{padding:8px 15px}.crumb{font-size:11px}.top-actions .mini-btn{display:none}}@media print{body{background:#fff!important;color:#141f2b!important;font-size:11pt}.aside,.topbar,.stickybar,.buttonrow,.tabs,.editor,.lint-result,.icon-button,.mini-btn{display:none!important}.layout{display:block}.page{width:100%;margin:0;padding:0}.hero{min-height:0;padding:10px 0 16px}h1{font-size:28pt!important}.section{padding-top:22px;break-before:page}.section-header{margin-bottom:12px}.card,.demo,.code-card,.callout,.rule{break-inside:avoid;box-shadow:none!important}.section h2{font-size:20pt}.demo-head,.demo-body,.demo-footer{padding:8px}.code-card{print-color-adjust:exact;-webkit-print-color-adjust:exact}.tooltip-pop{display:none!important}.footer{margin-top:25px}.timeline{break-inside:avoid}}@media(max-width:550px){.tooltip-pop{position:fixed;left:12px;right:12px;bottom:16px;top:auto;width:auto;max-width:none;transform:none!important;z-index:100}.tooltip-pop:after{display:none}}.lecture-heading{padding:42px 0 26px;border-bottom:1px solid var(--border);margin-bottom:10px}.lecture-heading h1{font-size:clamp(32px,4.3vw,51px);margin:11px 0 8px;max-width:none}.lecture-heading p{color:var(--muted);font-size:13px;margin:0}.page{width:min(1020px,calc(100% - 56px))}.section{padding-top:58px}.section-header{padding:0 0 17px;border-bottom:2px solid var(--border);margin-bottom:24px;gap:15px;align-items:center;position:relative}.section-header:after{content:"";position:absolute;bottom:-2px;left:0;width:94px;height:2px;background:var(--teal)}.section h2{font-size:clamp(25px,3.15vw,34px);letter-spacing:-.048em;margin:0;font-weight:830}.secno{width:49px;height:49px;border-radius:13px;background:var(--teal-l);color:var(--teal-d);border:1px solid color-mix(in srgb,var(--teal) 34%,transparent);font-size:15px}.toc a{font-size:12.5px}.toc .toc-n{color:var(--teal-d)}.visual-panel,.card,.table-wrap,.demo,.code-card,.compare .half{border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow)}.visual-panel.card,.visual-panel.demo,.visual-panel.table-wrap,.visual-panel.compare .half{background:var(--paper)}.table-wrap,.demo,.card,.code-card{margin:15px 0}.data-table th{background:color-mix(in srgb,var(--bg) 70%,var(--paper));color:var(--navy)}.demo-head,.card-head{background:color-mix(in srgb,var(--bg) 58%,var(--paper));border-bottom:1px solid var(--hair);padding:12px 17px;margin:-18px -21px 16px}.card.tight .card-head{margin:-14px -16px 13px;padding:10px 15px}.demo-head{margin:0;padding:13px 17px}.card-head{min-height:42px}.card-title,.demo-head strong{font-size:13px}.visual-panel.code-card{background:var(--code);border-color:#344d5e;border-radius:14px}.visual-panel.compact-reference{padding:14px 16px}.compact-reference .card-head{margin:-14px -16px 11px;padding:11px 15px}.knowledge-card,.rule{background:var(--teal-l);border:1px solid color-mix(in srgb,var(--teal) 29%,var(--border));border-left:4px solid var(--teal);border-radius:12px;box-shadow:none;padding:16px 18px;margin:15px 0}.knowledge-card.concept-card{display:flex;align-items:flex-start;gap:12px}.knowledge-label{display:block;color:var(--teal-d);font-size:10px;font-weight:850;letter-spacing:.11em;text-transform:uppercase;margin:0 0 5px}.knowledge-icon{display:flex;align-items:center;justify-content:center;background:color-mix(in srgb,var(--teal) 14%,var(--paper));border-radius:8px;border:1px solid color-mix(in srgb,var(--teal) 28%,var(--border));color:var(--teal-d);width:29px;height:29px;flex:none;font-weight:850;font-size:16px}.knowledge-card p{margin:0;font-size:13px;line-height:1.68;max-width:none}.knowledge-card .sign{font-size:17px;background:color-mix(in srgb,var(--teal) 14%,var(--paper));display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;flex:none;border-radius:8px}.knowledge-card.warn{background:var(--amber-l);border-color:color-mix(in srgb,var(--amber) 25%,var(--border));border-left-color:var(--amber)}.knowledge-card.danger{background:var(--red-l);border-color:color-mix(in srgb,var(--red) 30%,var(--border));border-left-color:var(--red)}.knowledge-card.blue{background:var(--blue-l);border-color:color-mix(in srgb,var(--blue) 25%,var(--border));border-left-color:var(--blue)}.knowledge-card strong{display:inline;font-size:inherit;margin:0}.rule{margin:0;background:var(--teal-l)}.rule p{color:var(--text)}.rule-grid{gap:13px;margin:15px 0}.glossary-section{margin:22px 0 11px;padding:20px 22px 23px;border-radius:16px;background:var(--paper);border:1px solid var(--border);box-shadow:var(--shadow);scroll-margin-top:80px}.glossary-title{display:flex;align-items:center;gap:11px;margin-bottom:13px}.glossary-icon{width:37px;height:37px;display:flex;align-items:center;justify-content:center;border-radius:10px;color:var(--teal-d);background:var(--teal-l);font-weight:850;font-family:Georgia,serif}.glossary-kicker,.extra-kicker{font-size:10px;font-weight:830;text-transform:uppercase;letter-spacing:.13em;color:var(--teal-d)}.glossary-title h2{margin:0;color:var(--navy);font-size:22px;line-height:1.2;letter-spacing:-.03em}.glossary-hint{font-size:11px;color:var(--muted);margin-left:auto}.glossary-buttons{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:14px}.glossary-pill{border:1px solid var(--border);background:var(--bg);color:var(--muted);padding:6px 11px;border-radius:7px;font-size:11px;font-weight:730;transition:all .15s}.glossary-pill:hover{background:var(--teal-l);color:var(--teal-d);border-color:color-mix(in srgb,var(--teal) 40%,var(--border))}.glossary-pill.active{background:var(--teal);color:#fff;border-color:var(--teal)}.glossary-detail{background:var(--teal-l);border-left:4px solid var(--teal);border-radius:9px;padding:14px 16px;min-height:88px}.glossary-detail strong{display:block;font-size:13px;color:var(--teal-d);margin-bottom:5px}.glossary-detail p{font-size:13px;margin:0;line-height:1.6}.glossary-detail .glossary-example{font-family:Consolas,monospace;font-size:11px;color:var(--muted);margin-top:6px}.glossary-fallback{font-size:13px}.study-split{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.12fr);gap:16px;align-items:stretch;margin:18px 0}.study-text{padding:20px 21px;background:var(--paper);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow);min-width:0}.study-text h3{margin:4px 0 15px;font-size:19px}.study-text h4{margin:5px 0 12px;font-size:16px}.study-text p{font-size:13px;margin:10px 0;line-height:1.7}.split-kicker{font-weight:830;font-size:10px;text-transform:uppercase;letter-spacing:.12em;color:var(--teal-d)}.range-formula{border-radius:9px;background:var(--bg);padding:10px 12px;margin-top:10px;border:1px solid var(--hair)}.range-formula span{font-size:11px;color:var(--muted);display:block}.range-formula strong{font-size:14px;color:var(--navy);font-family:Consolas,monospace}.study-text .split-muted{font-size:11.5px;color:var(--muted);margin-top:15px}.study-visual{min-width:0;display:flex;flex-direction:column}.study-visual>.demo,.study-visual>.code-card{flex:1;min-width:0;margin:0}.study-visual .demo-body{padding:16px}.study-visual .code-card pre{font-size:11.5px}.two-value-strip{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:14px 0}.two-value-strip div{background:var(--bg);border:1px solid var(--hair);padding:9px;border-radius:9px}.two-value-strip small{display:block;color:var(--muted);font-size:10px}.two-value-strip strong{display:block;color:var(--navy);font-size:13px;white-space:nowrap;font-family:Consolas,monospace;margin-top:4px}.char-equation{display:flex;align-items:center;flex-wrap:wrap;gap:11px;color:var(--muted)}.char-equation .char-symbol{font:800 22px Consolas,monospace;color:var(--teal-d);background:var(--teal-l);padding:8px 15px;border-radius:9px}.char-equation strong{color:var(--navy);font:800 22px Consolas,monospace}.supplementary-area{padding-top:46px;scroll-margin-top:70px}.supplementary{border:1px solid color-mix(in srgb,var(--teal) 33%,var(--border));background:var(--paper);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}.supplementary summary{padding:19px 22px;cursor:pointer;display:flex;align-items:center;gap:13px;list-style:none;-webkit-user-select:none;user-select:none}.supplementary summary::-webkit-details-marker{display:none}.supplementary summary:hover{background:var(--teal-l)}.extra-icon{width:42px;height:42px;display:flex;align-items:center;justify-content:center;background:var(--teal-l);border-radius:12px;color:var(--teal-d);font-size:24px;flex:none}.summary-main{display:flex;flex-direction:column;gap:2px}.summary-main strong{font-size:21px;letter-spacing:-.03em;color:var(--navy);line-height:1.15}.extra-hint{color:var(--muted);font-size:12px}.extra-chevron{margin-left:auto;color:var(--teal);font-size:26px;transition:transform .22s}.supplementary[open] .extra-chevron{transform:rotate(180deg)}.supplementary[open] .extra-icon{background:var(--teal);color:#fff}.extra-content{border-top:1px solid var(--border);padding:8px 23px 24px}.extra-content h3{color:var(--navy);font-size:18px;letter-spacing:-.025em;margin:25px 0 10px}.extra-content p{font-size:13px}.extra-content .extra-context{color:var(--muted)}.extra-topic>p{font-size:13px}.extra-topic .rule-grid{margin-top:15px}.tooltip-wrap{position:relative}.tooltip-wrap>.tooltip-pop{display:none!important}.tooltip-portal{position:fixed;z-index:2147483647;visibility:visible;opacity:1;pointer-events:auto;width:min(330px,calc(100vw - 24px));max-height:min(60vh,350px);overflow-y:auto;padding:14px 16px;background:var(--paper);color:var(--text);box-shadow:0 20px 60px #0b1a2345;border:1px solid var(--border);border-radius:12px;line-height:1.57;font-size:12px;text-align:left}.tooltip-portal strong{font-weight:780;color:var(--navy)}.tooltip-portal[hidden]{display:none!important}.tooltip-portal:before{content:"ПОЯСНЕНИЕ";display:block;color:var(--teal-d);letter-spacing:.1em;font-size:9px;font-weight:850;margin-bottom:6px}.info-button:focus-visible,.glossary-pill:focus-visible,.supplementary summary:focus-visible{outline:2px solid var(--teal);outline-offset:3px}@media(min-width:821px){.study-split .demo,.study-split .code-card{height:100%}}@media(max-width:1050px){.study-split{grid-template-columns:1fr}.study-visual .demo-body{padding:16px 18px}}@media(max-width:820px){.page{width:calc(100% - 32px)}.lecture-heading{padding:28px 0 16px}.section{padding-top:47px}}@media(max-width:550px){.glossary-section{padding:15px}.glossary-hint{display:none}.study-text{padding:16px}.section-header{gap:10px}.section h2{font-size:24px}.two-value-strip{grid-template-columns:1fr 1fr}.two-value-strip strong{font-size:11px}.extra-content{padding:6px 14px 19px}.supplementary summary{padding:15px}.extra-hint{font-size:11px}.glossary-buttons{gap:6px}}@media print{.supplementary:not([open]) .extra-content{display:none}.glossary-buttons{display:none}.study-split{break-inside:avoid}.tooltip-portal{display:none!important}}:root{--bg:#f4f1e9;--paper:#fdfbf7;--text:#27313a;--muted:#68747b;--border:#d2d0c8;--hair:#e7e3dc;--navy:#25394c;--teal:#405f80;--teal-d:#345575;--teal-l:#edf2f6;--amber:#94603c;--amber-l:#f8f2eb;--red:#a15049;--red-l:#faf0ec;--blue:#405f80;--blue-l:#edf2f6;--purple:#746b83;--purple-l:#f1eef3;--shadow:none;--code:#202b37;--codeText:#f0eee9;--highlight:#eaf0f4}body.dark{--bg:#181e24;--paper:#212931;--text:#e6e8e6;--muted:#a4b0b7;--border:#3e4850;--hair:#323b43;--navy:#eef0ee;--teal:#91afca;--teal-d:#aecbe5;--teal-l:#283c4d;--amber:#d8ad80;--amber-l:#3d332b;--red:#e2a095;--red-l:#402f30;--blue:#97b8d8;--blue-l:#293d4f;--purple:#ada1c2;--purple-l:#383340;--shadow:none;--code:#151e27;--codeText:#edece8;--highlight:#344351}body{font-family:Segoe UI,Inter,system-ui,-apple-system,Arial,sans-serif;line-height:1.62;font-size:15px;letter-spacing:0;text-rendering:optimizeLegibility}::selection{background:#bfd2dc;color:#243647}a{color:var(--teal-d)}code:not(pre code){color:var(--navy);background:color-mix(in srgb,var(--bg) 80%,var(--paper));border:1px solid var(--hair);padding:1px 4px;border-radius:2px}body.dark code:not(pre code){background:#27333c;color:#c1d7ea}strong,b{font-weight:650}.layout{max-width:1610px;grid-template-columns:246px minmax(0,1fr)}.aside{background:var(--bg);border-right:1px solid var(--border);padding:28px 15px 20px 19px;z-index:8}.mark{padding:0 9px 25px;border-bottom:1px solid var(--border)}.mark-icon{border-radius:2px;width:35px;height:35px;background:var(--navy);color:var(--paper);font-size:18px;box-shadow:none}.mark-icon span{color:#d9b587!important}.mark strong{font-size:12px;letter-spacing:.04em;font-weight:750}.mark small{font-size:11px}.aside-label{font-size:10px;letter-spacing:.15em;font-weight:750;padding-top:27px}.toc{gap:0}.toc a{border-radius:0;border-left:2px solid transparent;padding:10px 8px 10px 12px;font-size:12px;transition:color .1s}.toc a:hover{background:transparent;color:var(--navy)}.toc a.active{background:transparent;border-left-color:var(--teal);color:var(--navy);font-weight:700}.toc-n{font-size:10px;opacity:.75}.topbar{-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--bg);padding:15px clamp(22px,5vw,74px);min-height:59px}.topbar .tag{display:none}.crumb{font-size:11px;letter-spacing:.02em}.icon-button,.mini-btn,.btn,.switch-button{border-radius:3px;box-shadow:none;font-size:12px;font-weight:560;min-height:34px;padding:7px 11px}.icon-button:hover,.mini-btn:hover,.btn:hover{transform:none;background:var(--teal-l);color:var(--navy);border-color:var(--teal)}.btn.primary{background:var(--navy);border-color:var(--navy);color:var(--paper)}.btn.primary:hover{background:var(--teal-d);border-color:var(--teal-d);color:#fff}.btn.soft{background:var(--teal-l);border-color:var(--border);color:var(--teal-d)}.page{width:min(1040px,calc(100% - 80px));padding-bottom:90px}.lecture-heading{padding:68px 0 31px;margin:0 0 21px;border-bottom:1px solid var(--border)}.eyebrow,.split-kicker{color:var(--teal-d);font-weight:700;font-size:10px;letter-spacing:.18em}.eyebrow:before{height:1px;background:var(--teal);width:26px}.lecture-heading h1,h1{font:normal clamp(38px,4.7vw,65px)/1.08 Georgia,"Times New Roman",serif;letter-spacing:-.038em;color:var(--navy);margin:18px 0 16px}.lecture-heading h1 span,h1 span{color:var(--navy)}.lecture-heading p{font-size:13px;letter-spacing:.01em}.section{padding-top:79px}.section-header{border:0;border-bottom:1px solid var(--border);gap:19px;align-items:baseline;padding:0 0 16px;margin-bottom:25px}.section-header:after{display:none}.secno{background:transparent;border:0;border-radius:0;color:var(--teal-d);height:auto;width:39px;font:italic 25px/1 Georgia,serif;justify-content:start;align-self:baseline}.section h2{font:normal clamp(28px,3.1vw,40px)/1.13 Georgia,"Times New Roman",serif;letter-spacing:-.035em;color:var(--navy)}.section h3{font-size:18px;letter-spacing:-.013em;font-weight:680;color:var(--navy);margin:31px 0 11px}.section h4{font-size:15px;font-weight:660}.section p{margin-bottom:12px}.card,.table-wrap,.demo,.code-card,.compare .half,.visual-panel,.summary-card,.rule,.study-text,.glossary-section,.supplementary{box-shadow:none!important;border-radius:3px!important}.card,.table-wrap,.demo,.compare .half,.visual-panel.card,.visual-panel.demo,.visual-panel.table-wrap{background:var(--paper);border:1px solid var(--border)}.card,.demo,.table-wrap,.code-card{margin:19px 0}.card{padding:20px 22px}.card-head,.card.tight .card-head,.demo-head{background:transparent;border-bottom:1px solid var(--hair);margin:-20px -22px 17px;padding:15px 21px}.card.tight .card-head{margin:-14px -16px 13px;padding:13px 16px}.demo-head{margin:0;padding:17px 20px;min-height:50px}.demo-head strong,.card-title{font-size:13px;font-weight:690;letter-spacing:.01em;color:var(--navy)}.card .tag,.demo-head .tag{display:none}.demo-body{padding:21px 23px}.demo-footer{background:transparent;border-top:1px solid var(--hair);padding:12px 22px;font-size:11px;color:var(--muted)}.tag{border-radius:2px;background:transparent!important;border:1px solid var(--border)!important;color:var(--muted)!important;font-size:10px;font-weight:590}.caption{font-size:11px;color:var(--muted)}.data-table{font-size:12.5px}.data-table th{background:transparent;font-size:10px;font-weight:710;letter-spacing:.1em;color:var(--muted);border-bottom:1px solid var(--border);padding:14px 17px}.data-table td{border-top:1px solid var(--hair);padding:12px 17px}.data-table tbody tr:hover{background:color-mix(in srgb,var(--teal-l) 56%,var(--paper))}.data-table .mono{color:var(--navy);font-weight:660}.knowledge-card,.callout,.rule,.knowledge-card.warn,.knowledge-card.danger,.knowledge-card.blue{border:0;border-left:2px solid var(--teal);background:var(--teal-l);border-radius:0!important;box-shadow:none!important;padding:16px 18px;margin:18px 0}.knowledge-card.warn,.callout.warn{background:var(--amber-l);border-left-color:var(--amber)}.knowledge-card.danger,.callout.danger{background:var(--red-l);border-left-color:var(--red)}.knowledge-card.blue,.callout.blue{background:var(--blue-l);border-left-color:var(--blue)}.knowledge-label{font-weight:700;font-size:10px;letter-spacing:.12em;color:var(--teal-d)}.knowledge-card.concept-card{gap:0}.knowledge-icon,.knowledge-card .sign{display:none!important}.knowledge-card p{font-size:13px;line-height:1.7}.callout strong{font-size:12px;color:var(--navy)}.rule{margin:0!important}.rule-grid{gap:10px;margin:18px 0}.rule h4{font-size:13px}.rule p{font-size:12px}.notice-inline{background:var(--teal-l);border-radius:2px;border-left:2px solid var(--teal);padding:10px 13px;font-size:12px}.notice-inline.ok{background:var(--teal-l)}.notice-inline.bad{background:var(--red-l);border-left-color:var(--red)}.statpill{background:transparent;border:0;border-radius:0;border-right:1px solid var(--border);padding:5px 13px 5px 0}.statpill strong{font-size:17px;font-weight:660;color:var(--navy)}.form-control,.tab{border-radius:2px;box-shadow:none}.tabs{border-bottom:1px solid var(--border);gap:0;margin-bottom:17px}.tab{border:0;border-bottom:2px solid transparent;background:transparent;padding:10px 15px;color:var(--muted);font-weight:560}.tab.active{border:0;border-bottom:2px solid var(--teal);color:var(--navy);background:transparent;font-weight:720}.tab:hover{background:var(--bg)}.buttonrow{gap:7px}.slot{border-radius:2px;background:transparent;border:1px solid var(--border);box-shadow:none}.slot.filled{background:var(--teal-l);border-color:var(--teal)}.slot.reserved{border:1px dashed var(--border);background:transparent}.slot.null{background:var(--amber-l);border-color:var(--amber)}.slot.selected{outline:2px solid var(--teal);outline-offset:1px;transform:none}.slot b{color:var(--navy)}.bit{border-radius:1px;background:#e0e9ed;color:#29495d;border:1px solid #afbdc8}.bit.sign{background:#efdfd9;color:#8b4c44;border-color:#c6a69c}.bit.exponent{background:#f4e8cf;border-color:#d3bc95;color:#745d40}.bit.mantissa{background:#dee8ef;border-color:#afc5d5;color:#365c79}body.dark .bit{filter:brightness(.75)}.flowchart{border:0;border-top:1px solid var(--hair);border-bottom:1px solid var(--hair);border-radius:0;background:transparent}.flowbox{border-radius:2px;background:var(--bg);color:var(--navy)}.flowarrow{font-weight:400;color:var(--teal)}.itemrail{border-radius:2px;border-style:solid}.itembox,.set-token{border-radius:2px;color:var(--navy);background:var(--teal-l)}.heap-node{border-width:1.5px;color:var(--navy)}.kv{border-radius:2px}.kv-key{background:var(--teal-l);color:var(--navy)}.compare .half{border:1px solid var(--border);border-top:2px solid var(--teal);background:var(--paper);padding:17px 18px}.compare .half.good{border-top-color:var(--teal)}.compare .half.bad{border-top-color:var(--red)}.explain-card,.range-formula,.two-value-strip div{border-radius:2px;background:var(--bg)}.code-card,.visual-panel.code-card{background:var(--code);border:1px solid color-mix(in srgb,var(--code) 70%,#8a9aaa);border-radius:3px!important}.code-lights{display:none}.code-top{background:#ffffff06;padding:11px 18px;color:#bac9d0;border-bottom:1px solid rgba(255,255,255,.11)}.code-top-left{letter-spacing:.06em;font-size:10px;text-transform:uppercase}.code-actions button{border-radius:2px}.code-card pre{padding:20px 22px;font-size:12.5px;line-height:1.82}.code-card .token.keyword,.code-card .token.boolean{color:#e8ac9d}.code-card .token.number{color:#a9cfdf}.code-card .token.string,.code-card .token.char{color:#e1d09a}.code-card .token.class-name{color:#b2ceb5}.code-card .token.function{color:#b6cde8}.code-caption{border-top:1px solid rgba(255,255,255,.1)}.glossary-section{background:transparent;border:0;border-bottom:1px solid var(--border);padding:22px 0 28px;margin:0 0 12px}.glossary-title{margin-bottom:19px}.glossary-icon{border:1px solid var(--border);background:transparent;color:var(--teal-d);width:33px;height:33px;border-radius:2px;font-size:15px}.glossary-title h2{font: 25px Georgia,serif;letter-spacing:-.025em;color:var(--navy)}.glossary-buttons{gap:0;margin-bottom:16px}.glossary-pill{border:0;border-bottom:1px solid var(--border);background:transparent;border-radius:0;padding:9px 12px;font-weight:570;color:var(--muted);font-size:11.5px}.glossary-pill:hover{background:transparent;color:var(--navy);border-bottom-color:var(--teal)}.glossary-pill.active{background:transparent;border:0;border-bottom:2px solid var(--teal);color:var(--navy);font-weight:730}.glossary-detail{background:var(--teal-l);border:0;border-left:2px solid var(--teal);border-radius:0;padding:17px 21px;min-height:85px}.glossary-detail strong{color:var(--navy);font-size:13px}.glossary-detail p{font-size:13px}.study-split{gap:28px;grid-template-columns:minmax(0,.91fr) minmax(0,1.09fr);margin:27px 0}.study-text{border:0!important;background:transparent!important;padding:10px 2px 4px 0;box-shadow:none!important}.study-text h3{font-size:20px;line-height:1.3;font-weight:675;color:var(--navy)}.study-text h4{font-size:17px;line-height:1.3}.study-text p{font-size:13px;line-height:1.7}.study-text .split-muted{font-size:11.5px}.study-visual .demo,.study-visual .code-card{min-height:100%}.two-value-strip{gap:9px}.two-value-strip div{padding:10px 13px;border:1px solid var(--border)}.two-value-strip strong{color:var(--navy)}.char-equation .char-symbol{background:var(--teal-l);border:1px solid var(--border);border-radius:2px;color:var(--navy);padding:6px 12px}.char-equation strong{color:var(--teal-d)}.supplementary-area{padding-top:73px}.supplementary{background:var(--paper);border:1px solid var(--border);overflow:hidden}.supplementary summary{padding:20px 23px}.supplementary summary:hover{background:var(--bg)}.extra-icon{border:1px solid var(--border);border-radius:2px;background:transparent;color:var(--navy);width:38px;height:38px;font-size:19px}.summary-main strong{font: 27px Georgia,serif;letter-spacing:-.025em;color:var(--navy)}.extra-hint{font-size:11.5px}.extra-chevron{color:var(--teal-d)}.supplementary[open] .extra-icon{background:var(--teal-l);color:var(--navy)}.extra-content{padding:12px 23px 28px}.info-button{width:20px;height:20px;color:var(--teal-d);background:transparent;border:1px solid var(--teal);border-radius:50%;font:600 12px/1 Georgia,serif}.info-button:hover{background:var(--teal-l)}.tooltip-portal{background:var(--paper);border:1px solid var(--border);border-radius:3px!important;box-shadow:0 10px 38px #101d2930;padding:16px 18px;font-size:12px;max-height:min(76vh,640px);z-index:2147483647}.tooltip-portal:before{color:var(--teal-d);letter-spacing:.16em;font-weight:740;font-size:9px}.tooltip-portal strong{color:var(--navy)}.tooltip-portal.ascii-open{width:min(630px,calc(100vw - 28px));max-height:min(78vh,660px);padding:18px 20px}.ascii-reference h3{font: 24px Georgia,serif;letter-spacing:-.03em;margin:2px 0 7px;color:var(--navy)}.ascii-reference .ascii-intro{font-size:12px;color:var(--muted);margin:0 0 12px;line-height:1.55}.ascii-controls{display:flex;align-items:center;gap:0;flex-wrap:wrap;margin:0 0 12px;border-bottom:1px solid var(--border)}.ascii-controls button{color:var(--muted);background:transparent;border:0;border-bottom:2px solid transparent;padding:7px 10px;font-size:11px;border-radius:0}.ascii-controls button.active{border-bottom-color:var(--teal);font-weight:700;color:var(--navy)}.ascii-controls button:hover{color:var(--navy)}.ascii-search{display:block;width:100%;background:var(--paper);border:1px solid var(--border);border-radius:2px;font:12px Segoe UI,Arial,sans-serif;color:var(--text);padding:9px 11px;margin-bottom:9px}.ascii-count{font-size:10px;color:var(--muted);margin-bottom:5px;letter-spacing:.04em}.ascii-table-wrap{max-height:290px;overflow:auto;border:1px solid var(--border)}.ascii-table{width:100%;border-collapse:collapse;font-size:11px;table-layout:auto}.ascii-table thead th{position:sticky;top:0;background:var(--bg);color:var(--muted);text-align:left;font-size:9px;text-transform:uppercase;letter-spacing:.1em;padding:9px 11px;border-bottom:1px solid var(--border);z-index:1}.ascii-table td{padding:6px 11px;border-bottom:1px solid var(--hair);line-height:1.4}.ascii-table td:nth-child(1),.ascii-table td:nth-child(2),.ascii-table td:nth-child(3){font-family:Consolas,monospace;white-space:nowrap}.ascii-table td:nth-child(3){font-weight:700;color:var(--teal-d);font-size:12px}.ascii-table tbody tr:hover{background:var(--teal-l)}.ascii-table tbody tr[hidden]{display:none}.ascii-note{font-size:11px;color:var(--muted);margin:11px 0 0}@media(max-width:1120px){.layout{grid-template-columns:220px minmax(0,1fr)}.page{width:calc(100% - 54px)}}@media(max-width:820px){.aside{padding:9px 16px;background:var(--bg)}.page{width:calc(100% - 32px)}.lecture-heading{padding:35px 0 25px}.section{padding-top:57px}.study-split{grid-template-columns:1fr;gap:10px}.study-text{padding:0 0 10px}.topbar{padding:11px 16px}}@media(max-width:550px){.lecture-heading h1{font-size:37px}.section h2{font-size:29px}.section-header{gap:11px}.secno{font-size:21px;width:29px}.demo-body{padding:15px 14px}.demo-head{padding:13px 15px}.card{padding:16px}.card-head{margin:-16px -16px 14px;padding:12px 15px}.code-card pre{font-size:11px;padding:15px}.glossary-section{padding:18px 0}.glossary-title h2{font-size:23px}.glossary-pill{padding:8px 9px}.ascii-reference h3{font-size:21px}.tooltip-portal.ascii-open{width:calc(100vw - 24px);padding:12px}.ascii-table-wrap{max-height:35vh}.ascii-table td{padding:5px 7px}.ascii-table thead th{padding:7px}.summary-main strong{font-size:24px}}@media print{.page{width:100%}.section{padding-top:26px}.knowledge-card{background:#f2f4f5!important}.study-split{grid-template-columns:1fr 1fr}.tooltip-portal{display:none!important}}:root{--bg:#eef1ed;--paper:#fcfcf9;--text:#28363c;--muted:#67797c;--border:#c8d1cf;--hair:#dfe6e3;--navy:#253d49;--teal:#426b73;--teal-d:#315c65;--teal-l:#eaf2f1;--amber:#906648;--amber-l:#f7f1e9;--red:#a35b50;--red-l:#f8efeb;--blue:#476a7b;--blue-l:#edf3f5;--purple:#737286;--purple-l:#f1f1f2;--shadow:none;--highlight:#e4efed}body.dark{--bg:#1c2528;--paper:#222e32;--text:#dde5e4;--muted:#abb9ba;--border:#43565b;--hair:#354449;--navy:#e3eeee;--teal:#89b7bc;--teal-d:#add0d3;--teal-l:#2d4346;--amber:#d5b193;--amber-l:#3c332f;--red:#e2a69e;--red-l:#443334;--blue:#acc9d6;--blue-l:#283d45;--purple:#bcbacc;--purple-l:#34343d}.card,.table-wrap,.demo,.code-card,.compare .half,.visual-panel,.summary-card,.rule,.study-text,.glossary-section,.supplementary,.mark-icon,.glossary-detail,.glossary-pill,.slot,.bit,.flowchart,.flowbox,.itemrail,.itembox,.set-token,.kv,.kv-key,.two-value-strip div,.char-equation .char-symbol,.statpill,.explain-card,.range-formula,.extra-icon,.tooltip-portal,.ascii-search,.icon-button,.mini-btn,.btn,.tab,.switch-button,.tag,.notice-inline,.code-actions button,.form-control,input,select,textarea{border-radius:0!important}.card,.demo,.table-wrap{box-shadow:none!important}.term-entry{display:grid;grid-template-columns:minmax(145px,195px) 1fr;gap:15px;margin:15px 0 23px;border-left:2px solid var(--teal);background:var(--teal-l);padding:14px 17px;align-items:center}.term-index{display:flex;flex-direction:column;gap:2px}.term-index>span{font-size:9px;letter-spacing:.16em;font-weight:750;color:var(--teal-d)}.term-index>strong{font-size:13px;font-weight:750;color:var(--navy)}.term-index>em{font:italic 11px Georgia,serif;color:var(--muted)}.term-entry p{font-size:12px;line-height:1.55;margin:0!important}.glossary-section{padding:41px 0 50px;margin:60px 0 5px;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.glossary-title h2{font: 32px Georgia,Times New Roman,serif}.stream-flows{margin:17px 0 26px}.stream-flows .card{margin:0}.stream-flows .card .caption{padding-top:15px;margin-bottom:0}.stream-flows .card .flowchart{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;min-height:105px;gap:5px}.stream-return-split,.stream-validate-split{align-items:start}.return-formula{display:grid;gap:9px;margin:15px 0 19px}.return-formula>div{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;gap:9px;border:1px solid var(--border);background:var(--paper)}.return-formula code{font-size:12px}.return-formula span{font-size:11px;color:var(--muted)}.chain-card{margin:0;padding-bottom:18px}.chain-flow{max-width:330px;margin:10px auto 0}.chain-step{border:1px solid var(--border);padding:11px 13px;display:grid;grid-template-columns:32px 1fr;align-items:center;gap:5px;background:var(--bg)}.chain-step>span{font-size:10px;color:var(--teal-d);font-weight:750}.chain-step>code{font-weight:650}.chain-step>small{grid-column:2;color:var(--muted);font-size:10px}.chain-step.final{border-color:var(--teal);background:var(--teal-l)}.chain-arrow{text-align:center;color:var(--teal-d);font-size:19px;line-height:24px}.stream-cases{display:flex;gap:3px;border-bottom:1px solid var(--border);flex-wrap:wrap;margin-bottom:17px}.stream-inputline{display:flex;align-items:center;gap:14px;padding:12px 14px;border:1px solid var(--border);background:var(--bg);margin-bottom:12px}.stream-inputline small{letter-spacing:.13em;color:var(--muted);font-size:10px;font-weight:700}.stream-readsteps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.stream-readstep{border:1px solid var(--border);padding:15px;display:flex;flex-direction:column;gap:4px}.stream-readstep small{font-size:10px;color:var(--muted);letter-spacing:.08em}.stream-readstep code{font-size:13px;align-self:start}.stream-readstep>div{font-size:12px;margin-top:6px;color:var(--muted)}.stream-readstep>b{font-size:11px;color:var(--teal-d)}.stream-readstep.stream-error{border-color:var(--red)}.stream-readstep.stream-error>b{color:var(--red)}.stream-outcome{margin:14px 0 9px;padding:12px 15px;border-left:2px solid var(--red);background:var(--red-l);display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.stream-outcome strong{font-size:12px}.stream-outcome small{font-size:11px;color:var(--muted)}.stream-outcome.stream-success{background:var(--teal-l);border-left-color:var(--teal)}.source-delta{font-size:11px;color:var(--muted);padding:12px 0;border-top:1px solid var(--hair);margin-top:22px}@media(max-width:680px){.term-entry{grid-template-columns:1fr;gap:9px;padding:12px 14px}.term-index{display:flex;flex-direction:row;align-items:baseline;gap:7px;flex-wrap:wrap}.term-index em{font-size:10px}.return-formula>div{flex-wrap:wrap}.stream-readsteps{grid-template-columns:1fr}.glossary-title h2{font-size:28px}.stream-outcome{display:block}}:root{--bg:#f0f2ef;--paper:#fafbf9;--text:#1e2b30;--muted:#59696d;--border:#bfc9c6;--hair:#dce2df;--navy:#22383d;--teal:#246f68;--teal-d:#185c57;--teal-l:#e0ece8;--amber:#8f641f;--amber-l:#f5eacb;--red:#a5483c;--red-l:#f8e7e1;--blue:#3e647d;--blue-l:#e4ecf1;--purple:#605c83;--purple-l:#e8e8f0;--shadow:none}body.dark{--bg:#101c20;--paper:#1b292c;--text:#e3e9e7;--muted:#a0b1b2;--border:#536567;--hair:#33484b;--navy:#d8e8e4;--teal:#69b6a9;--teal-d:#98cfc5;--teal-l:#28413e;--amber:#e0b274;--amber-l:#443b2a;--red:#ec9a8a;--red-l:#4b3431;--blue:#9ebbd0;--blue-l:#2d434f;--purple:#a9a3d6;--purple-l:#3a3a51;--shadow:none}:where(.card,.visual-panel,.rule,.brief,.knowledge-card,.concept-card,.callout,.term-entry,.demo,.code-card,.table-wrap,.compare,.glossary-section,.glossary-detail,.glossary-pill,.glossary-icon,.tag,.info-button,.mini-btn,.icon-button,.btn,.tab,.secno,.mark-icon,.statpill,.supplementary,.supplementary-area,.tooltip-portal,.tooltip-pop,.ascii-reference,.ascii-table,.ascii-search,.stream-readstep,.study-split,.summary-main,.extra-icon,.stream-outcome,.rule-grid,.intro-brief,.switch-button,.bubble,.panel,.flow-node,.chapterlinks a){border-radius:0!important;box-shadow:none!important}.hero:before,.hero:after{display:none!important}.card,.visual-panel,.demo,.table-wrap{border-color:var(--border)}.knowledge-card{border-left:3px solid var(--teal)}.callout.warn{border-left-color:var(--amber)}.callout.danger{border-left-color:var(--red)}.section{padding-top:62px}.section-header{border-bottom:2px solid var(--navy);padding-bottom:14px;margin-bottom:23px}.section-header h2{letter-spacing:-.028em}.secno{background:var(--navy);color:var(--bg)}.lead,.intro-brief{display:none}.lecture-heading{padding-top:54px}.lecture-heading p{font-size:13px}.lecture-heading h1{max-width:900px}.term-entry{border-left:3px solid var(--teal)}.header-course{display:flex;gap:12px;flex-wrap:wrap;align-items:center;padding-top:8px}.header-course a{font-size:11px;display:inline-block;border-bottom:1px solid var(--border);color:var(--muted)}.header-course a.current{color:var(--teal-d);border-bottom:2px solid var(--teal);font-weight:800}.chap-bridge{display:flex;align-items:center;justify-content:space-between;margin:18px 0 22px;border-block:1px solid var(--border);padding:13px 0;gap:10px;flex-wrap:wrap}.chap-bridge a{font-size:12px;letter-spacing:.005em;font-weight:750}.chap-bridge span{font-size:11px;color:var(--muted)}.entity-map{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:9px;align-items:center;margin:18px 0 20px}.entity-map .map-node{border:1px solid var(--border);background:var(--paper);padding:14px 12px;min-height:88px}.map-node b{font-size:13px;display:block;color:var(--navy)}.map-node small{font-size:11px;color:var(--muted)}.entity-map .map-arrow{font-size:21px;color:var(--teal-d)}.entity-table td:first-child{min-width:150px}.entity-table td:nth-child(2){min-width:120px}.corner-label{display:inline-block;font-size:10px;text-transform:uppercase;letter-spacing:.12em;color:var(--teal-d);font-weight:800;margin-bottom:9px}.snippet-meta{font-size:11px;color:var(--muted)}.dialogue-two{display:grid;grid-template-columns:1.05fr .95fr;gap:15px;align-items:stretch}.dialogue-two>div{min-width:0}.dialogue-two p:last-child{margin-bottom:0}.cell-flow{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin:13px 0}.cell-flow .flow-box{padding:9px 12px;border:1px solid var(--border);background:var(--paper);font-family:Consolas,monospace;font-size:12px;color:var(--text)}.cell-flow .flow-sep{color:var(--teal);font-size:18px}.timeline-rows{border-top:1px solid var(--border)}.timeline-row{display:grid;grid-template-columns:100px 1fr;gap:12px;border-bottom:1px solid var(--border);padding:10px 0}.timeline-row>strong{font-size:12px;color:var(--teal-d)}.timeline-row>div{font-size:12px;color:var(--text)}.diagram-tower{display:flex;flex-direction:column;gap:0;border:1px solid var(--border);padding:13px;background:var(--paper)}.diagram-level{padding:12px 14px;border:1px solid var(--border);margin:5px;background:var(--bg);font-size:12px}.diagram-level b{display:block;color:var(--teal-d)}.diagram-level.level2{margin-left:26px}.diagram-level.level3{margin-left:51px}.diagram-level.level4{margin-left:76px}.result-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.result-pair>div{border:1px solid var(--border);padding:14px}.result-pair strong{display:block;font-size:13px;margin-bottom:6px}.result-pair code{white-space:pre-wrap;overflow-wrap:anywhere}.term-lite{display:inline-flex;align-items:center;gap:7px;background:var(--teal-l);border-left:3px solid var(--teal);padding:5px 9px;font-size:11px;font-weight:700;margin:3px 1px}.logic-demo .casegrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.logic-demo .casegrid>div{padding:12px;border:1px solid var(--border)}.logic-demo .casegrid div b{font-size:12px}.logic-demo .casegrid small{display:block;color:var(--muted);font-size:11px}.supplementary{border:1px solid var(--border)}.glossary-section{margin-top:64px}.sublabel{color:var(--muted);font-weight:650;font-size:12px;margin-bottom:8px}.letterhead{padding:9px 11px;border-left:3px solid var(--teal);background:var(--teal-l);font-size:12px}@media(max-width:700px){.entity-map{grid-template-columns:1fr;gap:5px}.entity-map .map-arrow{transform:rotate(90deg);text-align:center;font-size:16px}.dialogue-two,.result-pair{grid-template-columns:1fr}.diagram-level.level3{margin-left:30px}.diagram-level.level4{margin-left:42px}.timeline-row{grid-template-columns:80px 1fr}}@media print{.header-course{display:none}.section{break-inside:auto}.tooltip-wrap button{display:none}}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}:root{color-scheme:dark;--ui-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;--ui-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;--surface: #16141b;--surface-raised: #1c1922;--surface-subtle: #24202d;--ink: #e8e5ed;--ink-muted: #aaa3b5;--line: #3c3547;--line-soft: #2c2734;--accent: #c3a5ed;--accent-ink: #241734;--accent-soft: #2b2238;--success: #a3b9ad;--terminal-bg: #100e15;--terminal-ink: #ddd7e6;--terminal-muted: #aaa1b7;--terminal-accent: #c3a5ed;--syntax-blue: #b7a6cd;--syntax-purple: #c3a5ed;--warning-ink: #c3ac80;--danger-ink: #d49d9d}:root[data-theme=light]{color-scheme:light;--surface: #f8f6fa;--surface-raised: #fff;--surface-subtle: #efebf3;--ink: #2c2535;--ink-muted: #6c6179;--line: #d7cfe0;--line-soft: #e6e0eb;--accent: #7445a9;--accent-ink: #fff;--accent-soft: #eee5f7;--success: #4f705f;--syntax-blue: #79638e;--syntax-purple: #7445a9;--warning-ink: #8c6725;--danger-ink: #a94f57}html body,html body.dark{--bg: var(--surface);--paper: var(--surface-raised);--text: var(--ink);--muted: var(--ink-muted);--border: var(--line);--hair: var(--line-soft);--navy: var(--ink);--teal: var(--accent);--teal-d: var(--accent);--teal-l: var(--accent-soft);--amber: var(--warning-ink);--amber-l: color-mix(in srgb, var(--surface) 91%, var(--warning-ink));--red: var(--danger-ink);--red-l: color-mix(in srgb, var(--surface) 91%, var(--danger-ink));--blue: var(--syntax-blue);--blue-l: color-mix(in srgb, var(--surface) 91%, var(--syntax-blue));--purple: var(--syntax-purple);--purple-l: color-mix(in srgb, var(--surface) 91%, var(--syntax-purple));--code: var(--terminal-bg);--codeText: var(--terminal-ink);--highlight: var(--accent-soft);--shadow: none;margin:0;background:var(--surface);color:var(--ink);font-family:var(--ui-sans);padding-left:env(safe-area-inset-left,0px);padding-right:env(safe-area-inset-right,0px);padding-bottom:env(safe-area-inset-bottom,0px)}html body code:not(pre code),html body.dark code:not(pre code){color:inherit;background:transparent;border:0;border-radius:0;box-shadow:none;padding-inline:0}::selection{background:var(--accent);color:var(--accent-ink)}:focus-visible{outline:2px solid var(--accent);outline-offset:4px}a,button,input,summary{-webkit-tap-highlight-color:transparent}button,input{border-radius:0}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}@media print{:root,:root[data-theme=light]{color-scheme:light;--surface: #fff;--surface-raised: #fff;--surface-subtle: #f2f2f2;--ink: #171717;--ink-muted: #555;--line: #ccc;--line-soft: #e5e5e5;--accent: #7445a9;--accent-ink: #fff;--accent-soft: #eee5f7;--warning-ink: #946115;--danger-ink: #ad4b42}}.skip-link{position:fixed;top:-100px;left:16px;z-index:9999;padding:12px 18px;background:var(--surface);color:var(--ink);border:1px solid var(--accent)}.skip-link:focus{top:12px}.catalog-shell,.error-page{background:var(--surface);color:var(--ink);font-family:var(--ui-mono)}.catalog-shell{min-height:100vh}.catalog{width:min(1160px,calc(100% - 88px));margin-inline:auto}.catalog-header{display:flex;justify-content:space-between;align-items:center;gap:24px;min-height:88px;border-bottom:1px solid var(--line)}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font:600 14px var(--ui-mono);letter-spacing:-.035em;white-space:nowrap;text-decoration:none}.brand:hover{color:var(--accent);text-decoration:none}.brand-symbol{font-size:24px;color:var(--accent);margin-right:8px;letter-spacing:-.16em}.brand-divider{color:var(--ink-muted);padding-inline:3px;font-weight:400}.catalog-header nav{display:flex;align-items:center;gap:28px}.algo-course .catalog-button{border-color:#7b263d}.algo-course .catalog-button:hover{color:#e2a0b3;border-color:#b76780}@media(max-width:600px){.catalog-header{flex-wrap:wrap;padding-block:14px}.catalog-header nav{flex-wrap:wrap;gap:14px;width:100%;justify-content:space-between}}.catalog-header nav>a{color:var(--ink-muted);font-size:12px;text-decoration:none;min-height:44px;display:flex;align-items:center}.catalog-header nav>a:hover{color:var(--accent)}.theme-toggle{min-height:40px;border:1px solid var(--line);background:transparent;color:var(--ink-muted);border-radius:4px;gap:8px;padding:8px 11px;font:11px var(--ui-mono)}.theme-toggle:hover{background:var(--surface-subtle);color:var(--ink);border-color:var(--ink-muted);transform:none}.catalog-hero{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:64px;padding:82px 0 74px}.hero-copy{min-width:0}.catalog-kicker{font:10px/1.65 var(--ui-mono);color:var(--ink-muted);letter-spacing:.06em;margin:0 0 25px;display:flex;align-items:center;gap:9px}.status-dot{width:6px;height:6px;flex:none;border-radius:50%;background:var(--success)}.catalog h1{font:550 clamp(34px,4vw,53px)/1.19 var(--ui-mono);letter-spacing:-.065em;color:var(--ink);margin:0 0 25px;overflow-wrap:anywhere;max-width:none}.title-period{color:var(--accent)}.catalog-lead{color:var(--ink-muted);font:14px/1.9 var(--ui-sans);max-width:420px;margin:0 0 29px}.hero-actions{display:flex;gap:25px;align-items:center;flex-wrap:wrap}.catalog-button{display:inline-flex;align-items:center;justify-content:space-between;gap:17px;min-height:46px;padding:11px 15px;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);font:600 11px/1.5 var(--ui-mono);border-radius:3px;text-decoration:none;transition:background .16s,color .16s,transform .16s}.catalog-button:hover{background:transparent;color:var(--accent);text-decoration:none;transform:translateY(-2px)}.catalog-button span:last-child{margin-left:10px;font-size:17px}.catalog-button.secondary{color:var(--ink);background:transparent;border-color:var(--line)}.catalog-button.secondary:hover{border-color:var(--accent);color:var(--accent)}.hero-secondary{color:var(--ink-muted);font:11px var(--ui-mono);min-height:44px;display:inline-flex;align-items:center}.hero-secondary:hover{color:var(--ink)}.hero-meta{display:flex;flex-wrap:wrap;gap:8px 15px;margin-top:29px;color:var(--ink-muted);font-size:9px}.hero-meta span+span:before{content:"/";margin-right:15px;color:var(--line)}.catalog-illustration{min-width:0}.illustration-note{color:var(--ink-muted);font:9px/1.6 var(--ui-mono);text-align:right;margin:14px 0 0}.illustration-note span{color:var(--accent);margin-right:6px}.catalog-course{border-top:1px solid var(--line);padding:38px 0 15px;scroll-margin-top:24px}.course-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:25px}.course-heading .catalog-kicker{margin-bottom:12px;font-size:9px}.catalog h2{color:var(--ink);font:500 25px/1.3 var(--ui-mono);letter-spacing:-.045em;margin:0}.lecture-count{font:10px var(--ui-mono);letter-spacing:0;color:var(--ink-muted);border:1px solid var(--line);border-radius:3px;padding:4px 7px;margin-left:7px;vertical-align:middle}.lecture-search{display:grid;gap:7px;font:10px var(--ui-mono);color:var(--ink-muted);width:265px}.lecture-search>span:first-child{display:flex;justify-content:space-between;align-items:center}.lecture-search kbd{color:var(--ink-muted);border:1px solid var(--line);border-radius:2px;padding:1px 5px;font-size:10px}.search-field{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:transparent;padding:0 11px;border-radius:3px}.search-field>span{font-size:20px;color:var(--ink-muted)}.search-field:focus-within{border-color:var(--accent)}.lecture-search input{min-width:0;width:100%;min-height:40px;border:0;background:transparent;color:var(--ink);font:11px var(--ui-mono);padding:8px 0}.lecture-search input::placeholder{color:var(--ink-muted);opacity:.8}.lecture-search input:focus-visible{outline-offset:1px}.lecture-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}.lecture-list li{margin:0}.lecture-card{display:grid;grid-template-columns:53px minmax(0,1fr) 30px;gap:20px;padding:25px 8px;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none;transition:background .18s,padding-inline .18s}.lecture-card:hover{background:var(--surface-raised);color:var(--ink);padding-inline:17px;text-decoration:none}.lecture-card:focus-visible{outline-offset:-2px}.lecture-number{font:12px/1.6 var(--ui-mono);color:var(--ink-muted);padding-top:3px}.lecture-number:before{content:"["}.lecture-number:after{content:"]"}.lecture-label{font:9px/1.5 var(--ui-mono);color:var(--ink-muted)}.lecture-card h3{color:inherit;font:500 18px/1.4 var(--ui-mono);letter-spacing:-.04em;margin:6px 0 8px}.lecture-card p{font:12px/1.75 var(--ui-sans);color:var(--ink-muted);margin:0;max-width:740px}.lecture-arrow{align-self:center;justify-self:end;font-size:21px;color:var(--ink-muted);transition:transform .18s,color .18s}.lecture-card:hover .lecture-arrow{color:var(--accent);transform:translate(2px,-2px)}.search-status{color:var(--ink-muted);font:11px/1.7 var(--ui-mono);min-height:20px;margin:15px 0 0}.ml-course{display:flex;justify-content:space-between;align-items:center;gap:28px;border:1px solid var(--line);border-left:2px solid var(--accent);padding:29px 31px;margin:30px 0 65px;background:var(--surface-raised)}.ml-course .catalog-kicker{margin-bottom:13px;font-size:9px}.ml-course h2{font-size:21px}.ml-course p:last-child{font:12px/1.75 var(--ui-sans);color:var(--ink-muted);margin:11px 0 0}.ml-course{border:0;border-top:1px solid var(--line);background:transparent;padding-inline:0}.catalog-footer{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding:25px 0 30px}.catalog-footer .brand{font-size:11px}.catalog-footer>span,.catalog-footer>a:last-child{color:var(--ink-muted);font:9px/1.7 var(--ui-mono);text-decoration:none}.catalog-footer a:hover{color:var(--accent)}.error-page{min-height:100vh;padding-top:50px}.error-page .catalog-kicker{margin-top:70px}.terminal-window{min-width:0;color:var(--terminal-ink);background:var(--terminal-bg);border:1px solid var(--line);border-radius:6px;font:11px/1.7 var(--ui-mono);overflow:hidden;box-shadow:0 12px 40px #00000015}.terminal-chrome{display:flex;align-items:center;gap:13px;height:43px;padding:0 15px;border-bottom:1px solid #24282e;color:var(--terminal-muted);font-size:9px}.terminal-dots{display:inline-flex;gap:5px;margin-right:3px}.terminal-dots i{width:5px;height:5px;border:1px solid #5b606a;border-radius:50%}.terminal-dots i:first-child{background:var(--terminal-accent);border-color:var(--terminal-accent)}.terminal-motion{display:inline-flex;justify-content:center;align-items:center;width:35px;height:36px;padding:0;margin-left:auto;border:0;background:transparent;color:var(--terminal-muted);font:13px var(--ui-mono)}.terminal-motion:hover{color:var(--terminal-accent)}.terminal-motion:disabled{opacity:.4;cursor:default}.terminal-transcript{min-height:266px;max-height:266px;overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#3b4149 transparent;padding:20px 20px 15px}.terminal-transcript:focus-visible{outline-offset:-3px}.terminal-ascii{font:10px/1 var(--ui-mono);font-variant-ligatures:none;font-kerning:none;color:var(--terminal-accent);white-space:pre;overflow-wrap:normal;word-break:normal;margin:2px 0 23px;letter-spacing:0}.terminal-line{display:flex;align-items:baseline;gap:10px;min-height:20px;color:var(--terminal-ink);overflow-wrap:anywhere}.terminal-line>span:nth-child(2){min-width:0;overflow-wrap:anywhere}.terminal-prompt{color:var(--terminal-accent);flex:none}.terminal-caret{display:inline-block;flex:none;background:var(--terminal-accent);width:6px;height:13px;align-self:center;margin-left:-6px;animation:caret-blink 1.1s step-end infinite}.terminal-boot{min-height:83px;padding-top:11px;visibility:hidden}.terminal-boot.is-ready{visibility:visible}.terminal-boot p{color:#a5adb7;font-size:10px;margin:0 0 5px}.terminal-boot p span{color:#88c9a0;padding-right:7px}.terminal-boot.is-ready p{animation:terminal-line-in .28s ease both;animation-delay:calc(var(--stagger) * .18s)}.terminal-boot .terminal-hint{color:var(--terminal-muted);font-size:9px;margin-top:10px}.terminal-window[data-paused=true] *,.terminal-window[data-paused=true] *:after{animation-play-state:paused!important}.terminal-history{font-size:10px}.terminal-entry{margin-top:10px;animation:terminal-line-in .18s ease both}.terminal-help{padding:6px 0 3px 16px}.terminal-help p{display:grid;grid-template-columns:72px minmax(0,1fr);gap:8px;margin:2px 0;color:#a5adb7;font-size:10px}.terminal-help b{color:var(--terminal-accent);font-weight:400}.terminal-error{padding-left:16px;color:#e8a09a;font-size:10px;margin:5px 0}.terminal-output{margin:8px 0 12px;padding-left:16px;white-space:pre-wrap;overflow-wrap:anywhere;font:11px/1.8 var(--ui-mono);font-variant-ligatures:none;color:var(--terminal-ink)}.terminal-output.terminal-error{color:#e8a09a}.terminal-window[data-game] .terminal-transcript{min-height:340px;max-height:340px}.terminal-files{display:grid;padding:7px 0}.terminal-files a{display:flex;align-items:baseline;gap:12px;padding:5px 0;color:var(--terminal-ink);font-size:10px;line-height:1.5}.terminal-files a span:first-child{color:var(--terminal-accent)}.terminal-files a span:last-child{margin-left:auto}.terminal-files a:hover{color:var(--terminal-accent)}.terminal-input-line{display:flex;align-items:center;gap:10px;margin:0 18px;min-height:45px;border-top:1px solid #24282e}.terminal-input-line label{white-space:nowrap;font-size:10px}.terminal-user{color:#88c9a0}.terminal-input-line input{width:100%;min-width:0;min-height:43px;background:transparent;color:#e4e7eb;border:0;padding:8px 0;font:12px var(--ui-mono);caret-color:var(--terminal-accent)}.terminal-input-line input::placeholder{color:#757c88}.terminal-input-line input:focus-visible{outline:1px solid #526c96;outline-offset:1px}.terminal-input-line>button{border:1px solid #343943;border-radius:3px;background:transparent;color:#a5adb7;font:17px var(--ui-mono);width:29px;height:29px;flex:none}.terminal-input-line>button:hover{border-color:var(--terminal-accent);color:var(--terminal-accent)}.terminal-shortcuts{display:flex;gap:9px;align-items:center;flex-wrap:wrap;border-top:1px solid #24282e;padding:7px 15px;color:var(--terminal-muted);font-size:8px}.terminal-shortcuts button{color:#a5adb7;border:0;border-bottom:1px solid #343943;padding:4px 0;background:transparent;font:9px var(--ui-mono)}.terminal-shortcuts button:hover{color:var(--terminal-accent);border-color:var(--terminal-accent)}.terminal-status{display:inline-flex;align-items:center;gap:5px;margin-left:auto;font-size:8px}.terminal-status i{width:4px;height:4px;border-radius:50%;background:#88c9a0}.terminal-window :is(.terminal-chrome,.terminal-input-line,.terminal-shortcuts){border-color:#342c3f}.terminal-window :is(.terminal-boot p,.terminal-help p,.terminal-shortcuts button,.terminal-input-line>button){color:var(--terminal-muted)}.terminal-window :is(.terminal-user,.terminal-boot p span){color:var(--terminal-accent)}.terminal-input-line input{color:var(--terminal-ink)}.terminal-input-line input:focus-visible{outline-color:var(--terminal-accent)}.terminal-status i{background:var(--terminal-accent)}@keyframes caret-blink{50%{opacity:0}}@keyframes terminal-line-in{0%{opacity:0;transform:translateY(3px)}to{opacity:1;transform:translateY(0)}}.lecture-brand{text-decoration:none}.lecture-brand .mark-icon span{color:var(--accent)}.back-to-catalog{display:block;color:var(--accent);font:11px/1.7 var(--ui-mono);padding:13px 4px}.mobile-toc{display:none}.crumb a{color:inherit;text-decoration:none}.crumb a:hover{color:var(--accent)}.course-menu{border-block:1px solid var(--line);margin-top:23px}.course-menu summary{display:flex;align-items:center;justify-content:space-between;min-height:48px;color:var(--accent);font:11px var(--ui-mono);cursor:pointer;list-style:none}.course-menu summary::-webkit-details-marker{display:none}.course-menu summary span{color:var(--ink-muted);font-size:10px}.course-menu nav{display:grid;gap:3px;padding-bottom:13px}.course-menu nav a{display:flex;align-items:baseline;gap:13px;min-height:44px;color:var(--ink);font:12px/1.6 var(--ui-mono);border-radius:3px;padding:10px 12px}.course-menu nav a span{color:var(--ink-muted)}.course-menu nav a:hover,.course-menu nav a[aria-current]{color:var(--accent);background:var(--accent-soft);text-decoration:none}.adjacent-lectures{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding-top:25px;border-top:1px solid var(--line);margin-top:50px}.adjacent-lectures a{display:flex;flex-direction:column;gap:9px;border:1px solid var(--line);border-radius:3px;padding:19px;color:var(--ink)}.adjacent-lectures a:hover{border-color:var(--accent);text-decoration:none}.adjacent-lectures small{font:10px var(--ui-mono);color:var(--ink-muted)}.adjacent-lectures strong{font:500 13px/1.5 var(--ui-mono)}@media(max-width:1050px){.catalog-hero{gap:34px}.catalog{width:calc(100% - 56px)}.catalog h1{font-size:40px}.hero-meta{font-size:8px;gap:7px 10px}.hero-meta span+span:before{margin-right:10px}.terminal-transcript{padding-inline:16px}.terminal-ascii{font-size:9px}}@media(max-width:800px){.catalog-hero{gap:35px;grid-template-columns:1fr;padding:50px 0}.catalog h1{font-size:clamp(36px,6vw,50px)}.hero-copy{max-width:600px}.catalog-illustration{width:min(100%,600px)}.terminal-transcript{min-height:245px;max-height:245px}.terminal-ascii{font-size:10px}.hero-meta{font-size:9px}.catalog-lead{max-width:480px}}@media(max-width:600px){.catalog{width:calc(100% - 36px)}.catalog-header{min-height:75px;gap:12px}.brand{font-size:12px;gap:6px}.brand-symbol{font-size:21px;margin-right:4px}.catalog-header nav{gap:15px}.catalog-header nav>a{font-size:10px}.catalog-header .theme-label{display:none}.catalog-header .theme-toggle{min-width:38px;padding-inline:8px}.catalog-hero{padding:38px 0 40px;gap:30px}.catalog h1{font-size:clamp(29px,7.7vw,40px)}.catalog-kicker{font-size:8px;margin-bottom:23px;letter-spacing:0}.catalog-lead{font-size:13px;margin-bottom:24px}.hero-actions{gap:20px}.catalog-button{min-height:46px;font-size:10px;gap:11px}.hero-secondary{font-size:10px}.hero-meta{font-size:8px;margin-top:23px;gap:6px 10px}.hero-meta span+span:before{margin-right:10px}.illustration-note{font-size:8px}.terminal-transcript{min-height:238px;max-height:238px;padding:18px 14px 14px}.terminal-ascii{font-size:clamp(8px,2.3vw,10px);margin-bottom:20px}.terminal-chrome{padding:0 12px;gap:9px;font-size:8px}.terminal-input-line{margin-inline:13px;gap:8px}.terminal-input-line input{font-size:16px}.terminal-input-line>button{min-width:34px;min-height:38px}.terminal-user{display:none}.terminal-shortcuts{padding:6px 12px;gap:12px}.terminal-shortcuts>span:first-child{display:none}.terminal-shortcuts button{min-height:38px;font-size:10px}.terminal-motion{min-height:42px;min-width:35px}.terminal-boot p{font-size:9px}.terminal-boot .terminal-hint{font-size:8px}.course-heading{display:grid;gap:24px}.catalog-course{padding-top:30px}.catalog h2{font-size:22px}.lecture-search{width:100%}.lecture-search input{min-height:44px;font-size:16px}.lecture-list{margin-top:10px}.lecture-card{grid-template-columns:33px minmax(0,1fr) 16px;gap:10px;padding:22px 0}.lecture-card:hover{padding-inline:5px}.lecture-number{font-size:10px;padding-top:1px}.lecture-label{font-size:8px}.lecture-card h3{font-size:16px;overflow-wrap:anywhere}.lecture-card p{font-size:12px}.lecture-arrow{font-size:19px}.ml-course{display:grid;padding:22px 19px;gap:21px;margin:25px 0 42px}.ml-course h2{font-size:20px}.ml-course .catalog-button{justify-self:start}.catalog-footer{flex-wrap:wrap;align-items:start;gap:17px}.catalog-footer>span{width:100%;order:3}}@media(max-width:350px){.catalog-header nav{gap:11px}.catalog-header nav>a:first-child{display:none}.hero-meta{max-width:250px}.hero-meta span:last-child:before{display:none}}@media(max-width:600px){.catalog-header{padding-top:env(safe-area-inset-top,0px)}.catalog-header .theme-toggle{min-width:44px;min-height:44px}.catalog-lead{font-size:15px}.lecture-card p{font-size:14px;line-height:1.8}.terminal-shortcuts button,.terminal-motion,.terminal-input-line>button{min-height:44px}.terminal-input-line>button{min-width:44px}.terminal-files a{min-height:44px}}@media print{.catalog-header nav,.lecture-search,.catalog-illustration,.skip-link,.course-menu,.adjacent-lectures,.mobile-toc{display:none!important}.catalog{width:100%}.catalog-hero{display:block;padding:20px 0}.catalog-shell{background:#fff;color:#111}.catalog h1,.catalog h2,.catalog h3{color:#111}.lecture-card{break-inside:avoid}}
