:root{--bg:#fbfcfd;--surface:#fff;--text:#182b32;--muted:#6a7981;--line:#e0e7e9;--accent:#13765a;--accent-soft:#eaf5ef;--sidebar:#f1f5f5;--code-bg:#111d25;--code-text:#c5d4dc;--code-muted:#8196a2;--code-line:#2b3b45;--shadow:0 24px 70px #0003;--top:66px}
:root[data-theme=dark]{--bg:#111c22;--surface:#17262d;--text:#e1ecee;--muted:#98aeb7;--line:#2b3e46;--accent:#69d7ad;--accent-soft:#183c31;--sidebar:#132128;--code-bg:#0d171e;--code-text:#c9d8e0;--code-muted:#89a0ad;--code-line:#253640}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75}button,select,input{font:inherit}button,a,summary,select{touch-action:manipulation}a{color:var(--accent);text-underline-offset:4px}button{cursor:pointer;border:1px solid var(--line);border-radius:6px;color:var(--text);background:var(--surface);padding:8px 13px;line-height:1.5}button:hover{border-color:var(--accent);color:var(--accent)}button:disabled{opacity:.45;cursor:default}:focus-visible{outline:3px solid #28ac85;outline-offset:3px}h1,h2,h3,p{margin-top:0}.topbar{height:var(--top);display:flex;align-items:center;justify-content:space-between;padding:0 24px;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;background:var(--surface)}.brand{display:flex;gap:12px;align-items:center;color:var(--text);text-decoration:none;font-size:15px;white-space:nowrap}.brand strong{font-size:21px;letter-spacing:-.7px}.brand-mark{display:grid;place-items:center;background:var(--accent);color:var(--surface);width:30px;height:30px;font:800 18px monospace;border-radius:7px}.brand-separator{color:#9bacae;margin:0 4px}.header-tools{display:flex;gap:18px;align-items:center}.download{font-size:14px;color:var(--muted);text-decoration:none}.download:hover{color:var(--accent)}.icon-button{width:35px;height:35px;padding:0;font-size:23px;background:transparent;border-color:transparent}.layout{display:grid;grid-template-columns:230px minmax(440px,1fr) minmax(360px,38vw);align-items:start}.sidebar{position:sticky;top:var(--top);height:calc(100dvh - var(--top));overflow:auto;background:var(--sidebar);border-right:1px solid var(--line);padding:28px 17px 20px}.course-heading{padding:0 8px}.eyebrow{font-size:11px;letter-spacing:1.4px;color:var(--muted)}.course-heading h2{font-size:21px;font-weight:650;line-height:1.5;letter-spacing:-.5px;margin:13px 0 9px}.course-heading p{font-size:13px;color:var(--muted);margin:0 0 23px}.progress-heading{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);padding:0 8px}.progress-track{height:3px;background:var(--line);margin:9px 8px 24px}.progress-track span{display:block;background:var(--accent);height:100%;transition:width .2s}.nav-group{font-size:12px;font-weight:600;color:var(--muted);padding:16px 8px 7px;letter-spacing:.6px}.chapter-link{display:flex;align-items:flex-start;gap:9px;width:100%;text-align:left;padding:10px 9px;background:transparent;border:0;margin:1px 0;font-size:14px;line-height:1.55;border-radius:5px}.chapter-link .num{font-family:Consolas,monospace;font-size:12px;padding-top:2px;opacity:.55;flex-shrink:0}.chapter-link .nav-title{flex:1}.chapter-link.active{background:var(--accent-soft);color:var(--accent);font-weight:650;box-shadow:inset 2px 0 var(--accent)}.chapter-link.completed .num{opacity:1;color:var(--accent)}.sidebar-footer{border-top:1px solid var(--line);margin-top:24px;padding:20px 8px 0;display:grid;gap:10px}.sidebar-footer a,.sidebar-footer button{font-size:12px;color:var(--muted);text-align:left;padding:0;border:0;background:transparent;text-decoration:none}.reading{max-width:760px;margin:0 auto;padding:39px clamp(25px,3vw,54px) 40px}.chapter-meta{display:flex;justify-content:space-between;gap:15px;font-size:12px;letter-spacing:.4px;color:var(--muted);margin-bottom:19px}.chapter-meta span:first-child{color:var(--accent)}.chapter-title{display:flex;gap:17px;align-items:flex-start}.chapter-title>span{font:400 28px Consolas,monospace;color:var(--accent);opacity:.7;padding-top:3px}.chapter-title h1{font-size:clamp(27px,2.1vw,36px);font-weight:720;line-height:1.4;letter-spacing:-1px;margin-bottom:17px}.lead{font-size:17px;color:var(--muted);line-height:1.85;margin-bottom:26px}.route-map{display:flex;gap:10px;align-items:center;justify-content:space-between;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;font-size:11px;color:var(--muted);margin-bottom:34px}.route-map i{font-size:17px;color:#97aaa7;font-style:normal}.route-map span.current{color:var(--accent);font-weight:650}.prose h2{font-size:22px;font-weight:680;letter-spacing:-.5px;margin:39px 0 17px;line-height:1.5}.prose h2:first-child{margin-top:0}.prose p{margin-bottom:20px;line-height:1.95}.prose ul,.prose ol{padding-left:24px;margin:18px 0 26px}.prose li{padding-left:3px;margin:8px 0;line-height:1.9}.prose p code,.prose li code{background:var(--accent-soft);color:var(--accent);padding:2px 5px;border-radius:3px;font-size:14px}.block-code{position:relative;margin:24px 0;border-radius:7px;border:1px solid var(--code-line);background:var(--code-bg);color:var(--code-text);overflow:hidden}.block-code-header{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;border-bottom:1px solid var(--code-line);font-size:12px;letter-spacing:.5px;color:var(--code-muted)}.block-code-header button{font-size:12px;padding:2px 6px;color:var(--code-muted);background:transparent;border-color:transparent}.block-code pre{font:13px/1.8 Consolas,"Cascadia Code",monospace;padding:16px;overflow:auto;margin:0;tab-size:4}.task-box{border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:6px;padding:25px;margin:38px 0;background:var(--surface)}.section-label{font-size:11px;letter-spacing:1.5px;color:var(--accent);font-weight:600}.task-box h2{font-size:23px;margin:9px 0 13px}.task-box p{font-size:15px;line-height:1.9}.criteria-item{display:flex;align-items:flex-start;gap:10px;font-size:14px;padding:9px 0}.criteria-item input{margin-top:7px;width:16px;height:16px;accent-color:var(--accent);flex-shrink:0}.checkpoint-actions{margin-top:20px;display:flex;gap:13px;align-items:center;flex-wrap:wrap}.primary{background:var(--accent);border-color:var(--accent);color:var(--surface);font-size:14px;font-weight:600}.primary:hover{background:var(--text);border-color:var(--text);color:var(--surface)}#completion-note{font-size:12px;color:var(--muted)}.self-check{padding:8px 0 30px}.self-check h2{font-size:20px;margin:12px 0 14px;line-height:1.65}.self-check summary{cursor:pointer;color:var(--accent);font-size:14px}.self-check details p{font-size:15px;margin-top:14px;padding:16px;background:var(--accent-soft);border-radius:5px}.chapter-pagination{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:25px;gap:15px}.chapter-pagination button{font-size:14px;max-width:47%;text-align:left}.chapter-pagination button:last-child{text-align:right}.reading-footer{margin-top:40px;font-size:11px;color:var(--muted);line-height:1.7}.reading-footer p{margin-bottom:5px}.demo{padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:7px;margin-top:35px}.demo h2{font-size:22px;margin:8px 0 10px}.demo p{font-size:14px;color:var(--muted);margin-bottom:18px}.demo select,.demo input{border:1px solid var(--line);background:var(--bg);color:var(--text);padding:8px;border-radius:4px;min-width:0;font-size:14px;max-width:100%}.demo label{font-size:13px;color:var(--muted);display:grid;gap:5px}.demo-controls{display:flex;align-items:end;gap:10px;flex-wrap:wrap}.demo-controls button{font-size:13px}.pipeline-nodes{display:flex;gap:5px;margin:24px 0 17px;flex-wrap:wrap}.pipeline-node{flex:1;min-width:70px;border:1px solid var(--line);padding:9px 4px;border-radius:4px;font-size:11px;text-align:center}.pipeline-node.active{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}.demo-log{min-height:82px;padding:14px;background:var(--sidebar);font:13px/1.8 "Microsoft YaHei",sans-serif;border-radius:4px;color:var(--text)}.watermark-stats{display:grid;grid-template-columns:repeat(3,1fr);margin:20px 0}.watermark-stats div{display:grid;gap:3px;text-align:center;border-right:1px solid var(--line)}.watermark-stats div:last-child{border:0}.watermark-stats strong{font:28px Consolas,monospace;color:var(--accent)}.watermark-stats span{font-size:12px;color:var(--muted)}.watermark-track{height:12px;background:var(--line);border-radius:3px;overflow:hidden;margin-bottom:20px}.watermark-track span{height:100%;display:block;background:var(--accent);transition:width .2s}.simulation-note{font-size:11px!important;margin-top:15px;margin-bottom:0!important}.mobile-menu,.floating-code,#close-code,.overlay{display:none}dialog{width:min(620px,90vw);max-height:85dvh;border:1px solid var(--line);border-radius:9px;background:var(--surface);color:var(--text);box-shadow:var(--shadow);padding:30px;overflow:auto;font-size:14px}dialog::backdrop{background:#06111688}dialog h2{font-size:26px;margin:12px 0 18px}dialog h3{font-size:18px;margin-top:25px}dialog code{overflow-wrap:anywhere;font-size:12px}.dialog-close{position:absolute;right:12px;top:12px}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:10px 18px;background:var(--text);color:var(--bg);border-radius:6px;font-size:13px;z-index:90;opacity:0;pointer-events:none;transition:opacity .2s;max-width:90vw}.toast.show{opacity:1}body.drawer-open{overflow:hidden}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Reading workbench — the reference's quiet file tree / tabbed editor form. */
:root{--bg:#faf9f6;--surface:#fffefd;--text:#25231f;--muted:#858078;--line:#e3dfd7;--sidebar:#f5f3ee;--top:52px;--editor-bg:#faf8f5;--editor-tree:#f3f0ea;--editor-text:#514c43;--editor-muted:#98938a;--editor-line:#ded8ce;--editor-accent:#ae5428;--editor-hot:#eee3d3;--editor-string:#557260;--editor-type:#667d8e}
:root[data-theme=dark]{--bg:#191b1c;--surface:#202325;--text:#e1dfda;--muted:#979997;--line:#383b3b;--sidebar:#1e2223;--editor-bg:#1c2022;--editor-tree:#242829;--editor-text:#d0cec8;--editor-muted:#757e80;--editor-line:#383d3e;--editor-accent:#d69a76;--editor-hot:#34302b;--editor-string:#aac09c;--editor-type:#9cbbd0}
.topbar{padding:0 28px}.brand-mark{width:25px;height:25px;font-size:15px;border-radius:5px}.brand strong{font-size:19px}.brand{margin-right:auto}.mobile-menu{display:block;margin-right:12px;font-size:19px}.layout{grid-template-columns:minmax(0,44.445%) minmax(0,55.555%);max-width:1760px;margin:0 auto;padding-right:52px;gap:0}.reading{padding:40px 52px;max-width:680px}.chapter-title h1{font-size:31px}.sidebar{display:none;position:fixed;top:var(--top);left:0;width:280px;height:calc(100dvh - var(--top));z-index:50;box-shadow:var(--shadow)}.sidebar.open{display:block}.overlay.open{display:block;position:fixed;inset:var(--top) 0 0;background:#1c1a1740;z-index:40}.code-panel{position:sticky;top:calc(var(--top) + 24px);height:calc(100dvh - var(--top) - 48px);margin-top:24px;border:1px solid var(--editor-line);background:var(--editor-bg);color:var(--editor-text);display:flex;flex-direction:column;min-width:0;overflow:hidden}.panel-heading{height:52px;flex-shrink:0;padding:0 22px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--editor-line)}.panel-heading strong{font:600 13px "Cascadia Code",Consolas,monospace;letter-spacing:.1px}.panel-actions{display:flex;align-items:center;gap:8px}.code-panel button{border:0;border-radius:0;background:transparent;color:inherit}.code-panel button:hover{color:var(--editor-accent)}.code-panel svg{width:14px;height:14px;flex-shrink:0;display:block}.editor-lock{padding:7px!important;color:var(--editor-muted)!important}.editor-lock svg{width:18px;height:18px}.editor-lock[aria-pressed=true]{color:var(--editor-accent)!important}.repo-workspace{display:grid;grid-template-columns:180px minmax(0,1fr);flex:1;min-height:0;overflow:hidden}.file-tree{background:var(--editor-tree);border-right:1px solid var(--editor-line);padding:12px 0;overflow:auto;scrollbar-width:thin;font:12px/1.5 "Cascadia Code",Consolas,monospace}.tree-folder>summary{display:flex;align-items:center;gap:7px;height:30px;padding:0 9px 0 calc(12px + var(--depth)*9px);color:var(--editor-muted);cursor:pointer;list-style:none;white-space:nowrap}.tree-folder>summary::-webkit-details-marker{display:none}.tree-folder>summary svg{opacity:.8}.tree-folder>summary span{overflow:hidden;text-overflow:ellipsis}.tree-folder:not([open])>summary svg{opacity:.5}.tree-file{display:flex;align-items:center;gap:7px;width:100%;height:30px;text-align:left;padding:0 9px 0 calc(12px + var(--depth)*9px)!important;font:inherit!important;white-space:nowrap;color:var(--editor-muted)!important}.tree-file span{overflow:hidden;text-overflow:ellipsis}.tree-file.is-active{background:var(--editor-bg)!important;color:var(--editor-text)!important}.tree-file:hover{background:var(--editor-bg)!important}.editor-column{display:flex;flex-direction:column;min-height:0;min-width:0;position:relative;overflow:hidden}.editor-topline{display:flex;align-items:stretch;height:37px;min-height:37px;border-bottom:1px solid var(--editor-line);background:var(--editor-tree);position:relative;z-index:2}.file-tabs{display:flex;flex:1;min-width:0;overflow-x:auto;scrollbar-width:none}.file-tabs::-webkit-scrollbar{display:none}.editor-tab{display:flex;align-items:center;flex-shrink:0;border-right:1px solid var(--editor-line);border-top:1px solid transparent;color:var(--editor-muted)}.editor-tab.is-active{background:var(--editor-bg);color:var(--editor-text);border-top-color:var(--editor-accent);margin-top:-1px}.editor-tab>[role=tab]{display:flex;align-items:center;gap:7px;font:12px/1.5 "Cascadia Code",Consolas,monospace;padding:0 6px 0 13px;height:36px}.tab-close{padding:4px 10px 4px 5px!important;color:var(--editor-muted)!important}.tab-close svg{width:11px;height:11px}.tab-close:hover{color:var(--editor-text)!important}.editor-menu{position:relative;flex-shrink:0}.editor-menu>summary{height:36px;width:33px;display:grid;place-items:center;cursor:pointer;list-style:none;font:18px monospace;color:var(--editor-muted)}.editor-menu>summary::-webkit-details-marker{display:none}.editor-menu-popover{position:absolute;right:8px;top:39px;width:260px;background:var(--editor-bg);border:1px solid var(--editor-line);box-shadow:0 8px 24px #0002;padding:6px}.editor-menu-popover button{display:block;padding:9px 10px;width:100%;text-align:left;font-size:12px}.editor-menu-popover button:hover{background:var(--editor-tree)}#source-info{white-space:pre-line;font:10px/1.8 "Cascadia Code",Consolas,monospace;color:var(--editor-muted);overflow-wrap:anywhere;padding:9px 10px;border-bottom:1px solid var(--editor-line);margin-bottom:4px}.source-code{position:relative;flex:1;min-height:0;overflow:auto;padding:11px 0 24px;font:12.5px/1.8 "Cascadia Code",Consolas,"Liberation Mono",monospace;tab-size:2;scrollbar-width:thin;scrollbar-color:var(--editor-line) var(--editor-bg);overscroll-behavior:contain;outline-offset:-3px}.code-line{display:flex;white-space:pre;width:max-content;min-width:100%;padding-right:24px;border-left:2px solid transparent}.line-number{position:sticky;left:0;z-index:1;background:var(--editor-bg);color:var(--editor-muted);width:49px;text-align:right;flex-shrink:0;padding-right:13px;border-right:1px solid var(--editor-line);margin-right:15px;user-select:none;font-size:11px}.code-line code{font:inherit}.code-line.is-new{background:var(--editor-hot);border-left-color:var(--editor-accent)}.code-line.is-new .line-number{background:var(--editor-hot)}.tok-comment{color:var(--editor-muted);font-style:italic}.tok-keyword{color:var(--editor-accent)}.tok-string{color:var(--editor-string)}.tok-type{color:var(--editor-type)}.code-fold{display:flex!important;gap:15px;align-items:center;min-width:100%;width:max-content;text-align:left;padding:7px 20px 7px 0!important;color:var(--editor-muted)!important;font:11px/1.7 "Cascadia Code",Consolas,monospace!important;border-left:2px solid transparent!important}.code-fold>span:first-child{width:49px;text-align:right;padding-right:13px;border-right:1px solid var(--editor-line);flex-shrink:0}.code-fold:hover{background:var(--editor-tree)!important}.editor-empty{display:grid;place-items:center;flex:1;color:var(--editor-muted);font-size:13px}.editor-empty[hidden],.source-code[hidden],.editor-menu[hidden]{display:none}.code-anchor-link{font-size:14px;color:var(--muted);background:transparent;border:0;padding:0 5px;margin-left:8px;opacity:0;vertical-align:middle}.prose h2:hover .code-anchor-link,.prose h2:focus-within .code-anchor-link{opacity:1}.reading-active .code-anchor-link{opacity:.65;color:var(--editor-accent)}.floating-code,#close-code{display:none}
@media(min-width:1700px){.layout{padding-right:64px}.reading{padding-top:48px}.source-code{font-size:13px}.repo-workspace{grid-template-columns:200px minmax(0,1fr)}}
@media(max-width:1199px){.layout{display:block;padding:0}.reading{padding:37px 45px;max-width:800px}.code-panel{display:none;position:fixed;right:20px;top:calc(var(--top) + 16px);margin:0;width:min(820px,calc(100vw - 40px));height:calc(100dvh - var(--top) - 36px);z-index:50;box-shadow:var(--shadow)}.code-panel.open{display:flex}.floating-code{display:block;position:fixed;right:20px;bottom:24px;background:var(--surface);color:var(--text);border:1px solid var(--editor-line);box-shadow:0 3px 15px #0001;z-index:25;font:12px "Cascadia Code",Consolas,monospace;padding:12px 17px}.overlay.open{z-index:40}#close-code{display:block;color:var(--editor-muted);font-size:24px;width:25px;height:28px;padding:0}.source-code{font-size:12.5px}.code-anchor-link{opacity:.6}}
@media(max-width:759px){.topbar{padding:0 13px;gap:8px}.mobile-menu{margin-right:0;flex-shrink:0}.brand{gap:7px;font-size:12px}.brand strong{font-size:17px}.brand-mark{display:none}.brand-separator{margin:0 1px}.header-tools{gap:6px;margin-left:auto}.download{font-size:12px}.markdown-download{display:none}.icon-button{width:29px}.reading{padding:28px 21px 40px}.chapter-title{gap:12px}.chapter-title h1{font-size:27px;letter-spacing:-.5px}.chapter-title>span{font-size:22px;padding-top:5px}.lead{font-size:16px}.route-map{gap:4px;font-size:10px}.prose h2{font-size:22px}.task-box,.demo{padding:20px}.checkpoint-actions{gap:9px}.code-panel{right:8px;top:calc(var(--top) + 8px);width:calc(100vw - 16px);height:calc(100dvh - var(--top) - 16px)}.panel-heading{height:44px;padding:0 13px}.repo-workspace{grid-template-columns:112px minmax(0,1fr)}.tree-folder>summary,.tree-file{padding-left:calc(7px + var(--depth)*6px)!important;gap:5px;font-size:11px!important}.tree-file svg,.tree-folder svg{width:12px;height:12px}.editor-tab>[role=tab]{font-size:11px;padding-left:8px;gap:5px}.source-code{font-size:11.5px}.line-number,.code-fold>span:first-child{width:35px;padding-right:8px}.line-number{margin-right:9px;font-size:10px}.code-fold{gap:9px;font-size:10px!important}.editor-menu-popover{width:min(260px,calc(100vw - 145px))}.block-code pre{font-size:12px}.chapter-pagination button{font-size:13px}.floating-code{bottom:16px;right:14px}.reading-footer{padding-bottom:25px}.pipeline-node{font-size:10px}dialog{padding:25px 22px}}

.table-scroll{max-width:100%;overflow:auto;margin:24px 0 30px;border:1px solid var(--line);scrollbar-width:thin}.prose table{border-collapse:collapse;width:100%;table-layout:fixed;font-size:13px;line-height:1.8}.prose th,.prose td{padding:12px 13px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.prose th{font-weight:600;background:var(--sidebar)}.prose tr:last-child td{border-bottom:0}.prose td code{font-size:12px;color:var(--accent)}

.prose th:first-child,.prose td:first-child{width:30%}.prose td:first-child{font:12px/1.8 Consolas,"Cascadia Code",monospace}.prose th,.prose td{padding:12px 10px}@media(max-width:759px){.prose table{min-width:520px}}
.reading-details{margin:24px 0;border:1px solid var(--line);border-radius:6px;background:var(--surface)}.reading-details>summary{padding:16px 18px;cursor:pointer;font-size:16px;font-weight:600;line-height:1.6}.reading-details>summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.details-content{padding:0 18px 12px}.details-content h3{font-size:18px;line-height:1.6;margin:24px 0 12px}.reading-details .table-scroll{margin:16px 0 24px}

/* Development playback uses the same tree and editor, with its own buffers. */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.play-development{font-size:12px;padding:6px 10px!important;color:var(--editor-accent)!important;border:1px solid var(--editor-line)!important;border-radius:4px!important;white-space:nowrap}
.play-development[aria-pressed=true]{background:var(--editor-hot)!important}
.repo-workspace[hidden],#development-player[hidden],#editor-lock[hidden]{display:none!important}
#development-player{display:flex;flex-direction:column;flex:1;min-height:0;min-width:0}
.development-controls{padding:12px 16px 0;border-bottom:1px solid var(--editor-line);background:var(--editor-bg);flex-shrink:0}
.development-buttons{display:flex;gap:5px;align-items:center;margin-bottom:10px;flex-wrap:wrap}
.development-buttons button{font-size:12px;padding:5px 9px!important;border:1px solid var(--editor-line)!important;border-radius:4px!important;line-height:1.5;white-space:nowrap}
.development-buttons .dev-toggle{color:var(--editor-accent);min-width:75px;background:var(--editor-hot)}
.development-buttons #dev-exit{margin-left:auto;color:var(--editor-muted)}
.development-controls select{color:var(--editor-text);background:var(--editor-bg);border:1px solid var(--editor-line);border-radius:4px;font-size:12px;padding:5px 6px;min-width:0;max-width:100%}
.development-stage{display:flex;align-items:center;gap:10px;min-width:0;font-size:11px;color:var(--editor-muted)}
.development-stage>span{flex-shrink:0;font-family:Consolas,monospace;min-width:45px}
.development-stage select{flex:1;width:0;text-overflow:ellipsis}
#dev-why{font-size:12px;line-height:1.7;color:var(--editor-text);margin:9px 0 11px;min-height:41px;overflow-wrap:anywhere}
.dev-progress{height:2px;margin:0 -16px;background:var(--editor-line)}
.dev-progress>span{display:block;height:100%;width:0;background:var(--editor-accent)}
.development-footer{padding:8px 13px;font-size:10px;line-height:1.6;display:flex;gap:12px;justify-content:space-between;flex-shrink:0;border-top:1px solid var(--editor-line);color:var(--editor-muted)}
#dev-state{color:var(--editor-accent);flex-shrink:0}
#dev-scope{text-align:right;max-width:65%;overflow-wrap:anywhere}
.dev-copy{font-size:10px;padding:0 10px!important;white-space:nowrap}
.dev-tree-empty{padding:0 12px;font:11px/1.8 "Microsoft YaHei",sans-serif;color:var(--editor-muted)}
.typing-cursor{display:inline-block;width:2px;height:1.1em;background:var(--editor-accent);vertical-align:-.15em;animation:typing-blink 1s steps(2,start) infinite}
.is-paused .typing-cursor{animation:none;opacity:.65}
@keyframes typing-blink{50%{opacity:0}}
@media(max-width:759px){.development-controls{padding:10px 10px 0}.development-buttons{gap:4px}.development-buttons button{padding:5px 7px!important;font-size:11px}.development-controls select{font-size:11px}.development-buttons .dev-toggle{min-width:66px}.development-workspace{grid-template-columns:92px minmax(0,1fr)}#dev-why{font-size:11px;min-height:57px}.dev-progress{margin:0 -10px}.development-footer{font-size:9px;padding:6px 9px;gap:6px}#dev-scope{max-width:57%}.play-development{font-size:11px;padding:5px 7px!important}}
@media(prefers-reduced-motion:reduce){.typing-cursor{animation:none}}