:root{color-scheme:light;--bg: #f8f8f8;--panel: #ffffff;--panel-strong: #eeeeee;--text: #222831;--muted: #393e46;--soft: #393e46;--line: color-mix(in srgb, #393e46 18%, #ffffff);--line-strong: #222831;--accent: #00adb5;--accent-strong: #00adb5;--accent-soft: color-mix(in srgb, #00adb5 9%, #ffffff);--success: #00adb5;--danger: #222831;--warn: #393e46;--radius: 8px;--shadow: 0 18px 44px rgba(34, 40, 49, .08);--shadow-hover: 0 20px 48px rgba(34, 40, 49, .12);--motion-fast: .14s ease;--motion: .22s cubic-bezier(.22, 1, .36, 1);--motion-slow: .36s cubic-bezier(.22, 1, .36, 1);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html{background:var(--bg);scrollbar-gutter:stable}body{margin:0;color:var(--text);background:var(--bg);line-height:1.6}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select,textarea{transition:border-color var(--motion),background-color var(--motion),color var(--motion),box-shadow var(--motion),transform var(--motion),opacity var(--motion)}.site-shell{width:min(1680px,calc(100% - 32px));margin:0 auto}.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:24px;margin:0 -16px;padding:22px 16px;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(14px);transform:translateY(0);transition:padding var(--motion),transform var(--motion-slow),background-color var(--motion),box-shadow var(--motion)}.topbar:after{position:absolute;right:0;bottom:-26px;left:0;height:26px;pointer-events:none;opacity:0;background:linear-gradient(to bottom,#22283133,#22283114 42%,#22283100);filter:blur(10px);transition:opacity var(--motion);content:""}.topbar.is-detached{padding-top:12px;padding-bottom:12px;background:color-mix(in srgb,var(--bg) 78%,transparent);box-shadow:0 12px 30px #22283114}.topbar.is-detached:after{opacity:1}.topbar.is-hidden{transform:translateY(calc(-100% - 28px))}.brand{display:flex;align-items:center;gap:12px;min-width:0}.brand-mark{display:grid;width:40px;height:40px;place-items:center;border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--text);color:#eee;font-weight:800}.brand strong,.brand small{display:block}.brand small{color:var(--muted);font-size:.78rem}.main-nav{display:flex;gap:8px}.main-nav a,.button{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);color:var(--muted);padding:9px 13px}.main-nav a:hover,.main-nav a.is-active,.button:hover,.knowledge-row:hover,.knowledge-card:hover{border-color:var(--line-strong);box-shadow:inset 0 0 0 1px var(--line-strong)}.main-nav a.is-active{background:var(--text);color:#eee}.button{display:inline-flex;align-items:center;justify-content:center;min-height:42px}.button.primary{background:var(--text);color:#eee;border-color:var(--text);font-weight:700}.button:hover,.main-nav a:hover{transform:translateY(-1px)}.workspace-hero{display:grid;grid-template-columns:minmax(0,1fr);gap:22px;align-items:stretch;padding:34px 0 28px}.identity-panel,.focus-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}.identity-panel{display:flex;flex-direction:column;justify-content:center;min-height:240px;padding:34px}.recent-post-panel{gap:22px}.recent-post-list{display:grid;gap:8px}@media(min-width:1180px){.recent-post-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 24px}.recent-post-item{border-bottom:1px solid var(--line)}}.recent-post-item{display:grid;grid-template-columns:104px auto minmax(0,1fr) auto;align-items:center;gap:12px;border-top:1px solid var(--line);padding:12px 0;color:var(--text)}.recent-post-item:hover{border-color:var(--line-strong)}.recent-post-item span,.recent-post-item small{color:var(--muted);font-size:.86rem}.recent-update-type{display:inline-flex;align-items:center;justify-content:center;min-width:42px;border:1px solid var(--accent);border-radius:999px;background:color-mix(in srgb,var(--accent) 18%,#ffffff);color:var(--accent-strong);padding:3px 9px;font-size:.78rem;font-weight:850;line-height:1}.recent-update-type[data-type=实验]{background:var(--accent);color:#fff}.recent-post-item strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.98rem}.eyebrow{margin:0 0 10px;color:var(--accent-strong);font-size:.8rem;font-weight:800;letter-spacing:0;text-transform:uppercase}h1,h2,h3,p{overflow-wrap:break-word}h1,h2,h3{margin:0;line-height:1.12}h1{max-width:760px;font-size:clamp(2rem,3.6vw,3.25rem)}h2{font-size:1.45rem}h3{font-size:1.05rem}.hero-text,.page-head p,.article-head p{max-width:760px;color:var(--muted);font-size:1rem}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.focus-panel{display:grid;align-content:start;gap:16px;padding:22px;box-shadow:var(--shadow)}.focus-head{display:grid;gap:4px;padding-bottom:16px;border-bottom:1px solid var(--line)}.focus-head span,.focus-panel p{color:var(--muted)}.focus-head strong{font-size:1.15rem}.focus-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.focus-stats>div{padding:14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel-strong)}.metric,.metric-label{display:block}.metric{color:var(--accent-strong);font-size:1.65rem;font-weight:850;line-height:1.1}.metric-label{margin-top:6px;color:var(--muted)}.module-section,.section-grid,.author-section{border-top:1px solid var(--line)}.module-section{padding:24px 0 30px}.section-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;padding:28px 0}.section-main,.section-side{padding-top:0}.section-heading{margin-bottom:16px}.inline-heading{display:flex;align-items:end;justify-content:space-between;gap:18px}.inline-heading p:last-child{width:min(520px,100%);margin:0;color:var(--muted)}.knowledge-list,.category-stack,.module-grid,.lesson-grid,.knowledge-grid{display:grid;gap:12px}.knowledge-row,.knowledge-card,.lesson-library-card,.module-card,.prereq-box{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);position:relative;overflow:hidden;transition:border-color var(--motion),box-shadow var(--motion),transform var(--motion),background-color var(--motion)}.knowledge-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px}.knowledge-row strong,.knowledge-row small{display:block}.knowledge-row small{margin-top:4px;color:var(--muted)}.pill{display:inline-flex;align-items:center;border:1px solid var(--accent);border-radius:999px;background:var(--accent-soft);color:var(--accent-strong);padding:3px 9px;white-space:nowrap;font-size:.78rem}.category-line{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);color:var(--muted)}.category-line strong{color:var(--text)}.module-grid{grid-template-columns:repeat(3,minmax(260px,1fr))}.module-card,.lesson-library-card,.knowledge-card{padding:18px}.lesson-grid{grid-template-columns:repeat(3,minmax(260px,1fr))}.lesson-library-card{display:flex;flex-direction:column;min-height:210px}.lesson-library-card[hidden]{display:none}.lesson-library-card:hover{border-color:var(--line-strong);box-shadow:inset 0 0 0 1px var(--line-strong),var(--shadow-hover)}.lesson-library-card p{color:var(--muted)}.lesson-library-card h2{margin:16px 0 9px;font-size:clamp(1.12rem,1.8vw,1.34rem)}.lesson-library-card h2 a{color:var(--text)}.knowledge-card{display:flex;flex-direction:column;min-height:205px}.knowledge-card[hidden]{display:none}.knowledge-card:before{position:absolute;inset:0;z-index:0;background-image:var(--card-banner);background-position:center;background-size:cover;content:"";opacity:0;pointer-events:none;transform:scale(1.02);transition:opacity .52s cubic-bezier(.55,0,1,.45),transform .52s cubic-bezier(.55,0,1,.45);-webkit-mask-image:linear-gradient(135deg,rgba(0,0,0,0) 0%,rgba(0,0,0,.08) 46%,rgba(0,0,0,1) 100%);mask-image:linear-gradient(135deg,#0000,#00000014 46%,#000)}.knowledge-card:hover:before{opacity:.9;transform:scale(1)}.knowledge-card>*{position:relative;z-index:1}.module-card p,.knowledge-card p{color:var(--muted)}.module-card{min-height:150px}.module-card.is-muted{background:var(--panel-strong)}.module-card.is-muted h3{color:var(--text)}.module-card:hover{border-color:var(--line-strong);box-shadow:inset 0 0 0 1px var(--line-strong),var(--shadow-hover)}.knowledge-card:hover{box-shadow:inset 0 0 0 1px var(--line-strong),var(--shadow-hover)}.coach-head{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:22px;align-items:end;padding:34px 0 24px}.coach-head h1{font-size:clamp(1.9rem,3vw,2.8rem)}.coach-head p,.muted-copy{max-width:760px;color:var(--muted)}.coach-status,.panel-block,.chat-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}.coach-status{display:grid;justify-items:start;gap:8px;padding:18px}.coach-status small{color:var(--muted)}.coach-layout{display:grid;grid-template-columns:360px minmax(0,1fr);gap:14px;align-items:start;padding:24px 0 72px;overflow-anchor:none;transition:grid-template-columns var(--motion-slow)}.coach-layout.compact{grid-template-columns:360px minmax(0,1fr)}.coach-layout.is-left-collapsed,.coach-layout.is-left-collapsing{grid-template-columns:36px minmax(0,1fr)}.coach-layout.is-left-collapsed .coach-sidebar,.coach-layout.is-left-collapsing .coach-sidebar{display:flex;justify-content:center;overflow:visible;border:0;background:transparent;padding:0;animation:sidebarCollapse var(--motion-slow) both}.coach-layout.is-left-collapsing .coach-sidebar .panel-block{opacity:0;transform:scale(.985);transform-origin:top left}.coach-layout.is-left-collapsed .coach-sidebar .panel-block>:not(.panel-heading){display:none}.coach-layout.is-left-collapsed .coach-sidebar .panel-block:not(:first-child){display:none}.coach-layout.is-left-collapsed .coach-sidebar .panel-block{min-height:0;border:0;background:transparent;padding:0;box-shadow:none}.coach-layout.is-left-collapsed .coach-sidebar .panel-heading{align-items:center;justify-content:center;margin-bottom:0}.coach-layout.is-left-collapsed .coach-sidebar .panel-heading>div{display:none}.coach-sidebar{display:grid;gap:12px;transition:opacity var(--motion),transform var(--motion)}.coach-sidebar .panel-block{transition:opacity var(--motion),transform var(--motion),border-color var(--motion),box-shadow var(--motion),background-color var(--motion)}.coach-layout.is-left-expanding .coach-sidebar .panel-block{animation:sidebarContentIn var(--motion-slow) both}@keyframes sidebarCollapse{0%{opacity:1;transform:none}to{opacity:1;transform:none}}@keyframes sidebarContentIn{0%{opacity:0;transform:scale(.985);transform-origin:top left}to{opacity:1;transform:none}}.panel-block{padding:16px;box-shadow:0 1px #22283108;transition:border-color var(--motion),box-shadow var(--motion),transform var(--motion),background-color var(--motion)}.panel-block:hover{border-color:var(--line-strong);box-shadow:var(--shadow)}.panel-heading{display:grid;gap:3px;margin-bottom:12px}.panel-heading-row{grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:12px}.panel-heading-row>div{display:grid;gap:3px;min-width:0}.panel-heading span,.chat-toolbar span,.answer-box label,.answer-box span{color:var(--muted);font-size:.82rem}.node-list,.link-stack{display:grid;gap:8px}.node-picker{display:grid;gap:10px}.node-picker-body{display:grid;max-height:520px;opacity:1;overflow:hidden;transform:translateY(0);transition:max-height var(--motion-slow),opacity var(--motion),transform var(--motion)}.node-picker.is-collapsed .node-picker-body{max-height:0;opacity:0;pointer-events:none;transform:translateY(-6px)}.node-list{max-height:360px;overflow:auto;padding-right:4px;scrollbar-width:thin}.node-list button,.chat-toolbar button,.answer-box button,.api-start,.side-toggle,.picker-toggle,.selected-node-card{display:inline-flex;align-items:center;justify-content:center;min-height:38px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);color:var(--muted);cursor:pointer}.side-toggle{width:38px;min-width:38px;padding:0;color:var(--muted)}.picker-toggle{width:34px;min-width:34px;min-height:34px;padding:0}.side-toggle:hover,.picker-toggle:hover{border-color:var(--line-strong);color:var(--text);background:var(--panel-strong);transform:translateY(-1px)}.toggle-icon{display:block;stroke-width:1.8}.icon-expand,.node-picker.is-collapsed .picker-toggle .icon-collapse{display:none}.node-picker.is-collapsed .picker-toggle .icon-expand{display:block}.coach-layout.is-left-collapsed .side-toggle[data-toggle-left]{width:34px;min-width:34px;min-height:34px;border-color:transparent;background:transparent;color:var(--text)}.coach-layout.is-left-collapsed .side-toggle[data-toggle-left]:hover{border-color:var(--line);background:var(--panel);box-shadow:var(--shadow)}.coach-layout.is-left-collapsed .side-toggle[data-toggle-left] .icon-collapse{display:none}.coach-layout.is-left-collapsed .side-toggle[data-toggle-left] .icon-expand{display:block}.node-list button{display:flex;justify-content:flex-start;padding:8px 12px;text-align:left}.node-list button span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.selected-node-card{display:flex;justify-content:flex-start;min-width:0;padding:10px 12px;text-align:left}.selected-node-card span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.selected-node-card span{color:var(--text);font-weight:800}.node-list button.is-active,.answer-box button{border-color:var(--text);background:var(--text);color:#eee;font-weight:700}.node-list button:hover,.chat-toolbar button:hover,.answer-box button:hover,.api-start:hover,.selected-node-card:hover{border-color:var(--line-strong);box-shadow:inset 0 0 0 1px var(--line-strong);transform:translateY(-1px)}.node-list button:active,.chat-toolbar button:active,.answer-box button:active,.api-start:active,.selected-node-card:active,.button:active{transform:translateY(0)}.link-stack a{border-bottom:1px solid var(--line);color:var(--muted);padding:8px 0}.panel-heading a,.context-return{color:var(--text)}.graphics-lab-page{display:grid;gap:14px;padding:24px 0 72px}.graphics-lab{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:14px;height:clamp(620px,calc(100vh - 116px),860px)}.lab-preview-panel,.lab-editor-panel{display:grid;min-height:0;min-width:0;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:0 1px #22283108}.lab-preview-panel{grid-template-rows:auto minmax(0,1fr) auto}.lab-editor-panel{grid-template-rows:auto auto minmax(0,1fr) auto}.lab-editor-panel:has(.lab-guide-workspace:not([hidden])){grid-template-rows:auto auto minmax(0,1fr)}.lab-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px;border-bottom:1px solid var(--line)}.lab-guide-state{border:1px solid var(--line);border-radius:999px;background:var(--panel-strong);color:var(--muted);padding:4px 10px;white-space:nowrap;font-size:.78rem}.lab-panel-head>div:first-child{display:grid;gap:2px;min-width:0}.lab-panel-head span,.lab-hints,.lab-status{color:var(--muted);font-size:.82rem}.lab-panel-head strong{overflow:hidden;color:var(--text);font-size:.98rem;text-overflow:ellipsis;white-space:nowrap}.lab-status{display:inline-flex;align-items:center;justify-content:flex-end;gap:8px;min-width:150px;text-align:right}.lab-status i{width:9px;height:9px;border-radius:999px;background:var(--muted)}.lab-status i[data-state=running]{background:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 16%,transparent)}.lab-status i[data-state=ok]{background:var(--accent)}.lab-status i[data-state=error]{background:var(--text)}.lab-canvas-wrap{position:relative;overflow:hidden;min-height:0;background:linear-gradient(90deg,rgba(57,62,70,.04) 1px,transparent 1px),linear-gradient(rgba(57,62,70,.04) 1px,transparent 1px),var(--bg);background-size:32px 32px}.lab-canvas-wrap canvas{display:block;width:100%;height:100%}.lab-error-box{max-height:180px;overflow:auto;border-top:1px solid var(--line);padding:12px 14px;background:var(--panel-strong);color:var(--text);font-family:Consolas,SFMono-Regular,monospace;font-size:.78rem;white-space:pre-wrap}.lab-toolbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:8px}.lab-toolbar button,.lab-toolbar-link,.lab-file-tabs button{min-height:34px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);color:var(--muted);cursor:pointer}.lab-toolbar button{padding:0 11px}.lab-toolbar-link{display:inline-flex;align-items:center;justify-content:center;color:var(--muted);padding:0 11px;font-size:.84rem}.lab-toolbar .lab-expand-toggle{display:inline-grid;width:34px;min-width:34px;padding:0;place-items:center}.lab-expand-toggle .icon-contract-workspace,.graphics-lab.is-editor-expanded .lab-expand-toggle .icon-expand-workspace{display:none}.graphics-lab.is-editor-expanded .lab-expand-toggle .icon-contract-workspace{display:block}.lab-toolbar button:hover,.lab-toolbar-link:hover,.lab-file-tabs button:hover{border-color:var(--line-strong);color:var(--text);box-shadow:inset 0 0 0 1px var(--line-strong)}.lab-toggle{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:0 10px;border:1px solid var(--line);border-radius:var(--radius);color:var(--muted);cursor:pointer}.lab-toggle input{width:14px;height:14px;accent-color:var(--accent)}.lab-file-tabs{display:flex;gap:8px;padding:10px 14px;border-bottom:1px solid var(--line)}.lab-file-tabs button{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:0 12px;font-size:.82rem}.lab-file-tabs button.is-active{border-color:var(--text);background:var(--text);color:#eee}.lab-editor-shell{position:relative;display:grid;min-height:0;height:100%;overflow:hidden}.lab-editor-host{height:100%;min-height:0}.lab-editor-host[hidden],.lab-guide-workspace[hidden],.lab-hints[hidden],.guide-setup[hidden],.guide-conversation[hidden]{display:none}.lab-guide-workspace{display:grid;height:100%;min-height:0;overflow:hidden;background:var(--panel)}.guide-setup,.guide-conversation{display:grid;min-height:0}.guide-setup{grid-template-rows:auto minmax(0,1fr)}.guide-conversation{grid-template-rows:auto auto minmax(0,1fr) auto;height:100%;min-height:0;border:0;border-radius:0;background:var(--panel);overflow:hidden}.guide-panel-head{border-bottom:1px solid var(--line)}.guide-setup-body{display:grid;align-content:start;gap:14px;overflow:auto;padding:16px}.guide-rule-card,.guide-alert{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel-strong);padding:13px}.guide-rule-card{display:grid;gap:5px}.guide-rule-card strong{color:var(--text);font-size:.92rem}.guide-alert{border-color:var(--line-strong);background:color-mix(in srgb,#222831 7%,#ffffff);color:var(--text)}.guide-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-start;gap:8px}.guide-actions button,.lab-ai-config button{min-height:34px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);color:var(--text);padding:0 12px;cursor:pointer}.guide-actions{flex:0 0 auto}.lab-ai-config{display:grid;gap:12px;max-width:560px}.lab-hints{display:flex;flex-wrap:wrap;gap:8px;padding:10px 14px;border-top:1px solid var(--line)}.lab-guide-state{width:fit-content}.lab-hints span{border:1px solid var(--line);border-radius:999px;padding:3px 9px;background:var(--panel-strong)}.guide-log{min-height:0;max-height:none}.guide-log .message{width:auto;min-width:min(190px,62vw);max-width:min(78%,680px)}.guide-log .from-coach{background:#fff}.guide-log .from-user{justify-self:end;min-width:min(54px,62vw)}.guide-log .message-body{gap:7px;line-height:1.65;overflow-wrap:anywhere}.guide-log .message-body strong{color:var(--text)}.guide-log .guide-event{justify-self:center;display:flex;align-items:center;gap:10px;max-width:min(88%,760px);min-height:30px;border:1px solid var(--line);border-radius:999px;background:color-mix(in srgb,var(--panel-strong) 68%,transparent);color:var(--muted);padding:6px 12px;font-size:.8rem}.guide-log .guide-event span{flex:0 0 auto;color:var(--text);font-weight:800}.guide-log .guide-event p,.lab-ai-config p{margin:0;color:var(--muted);font-size:.84rem;line-height:1.5}.lab-ai-config input{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);color:var(--text)}.guide-actions button:hover,.lab-ai-config button:hover{border-color:var(--line-strong);box-shadow:inset 0 0 0 1px var(--line-strong)}.lab-ai-config label{display:grid;gap:6px;color:var(--muted);font-size:.84rem}.lab-ai-config input{width:100%;min-height:38px;padding:0 10px}.lab-ai-config button{justify-self:start;border-color:var(--text);background:var(--text);color:#eee;font-weight:750}.graphics-lab.is-editor-expanded{grid-template-columns:0 minmax(0,1fr);gap:0}.graphics-lab.is-editor-expanded .lab-preview-panel{opacity:0;pointer-events:none;transform:scale(.985)}.graphics-lab.is-editor-expanded .lab-editor-panel{min-height:calc(100vh - 128px)}.compact-select,.coach-search{margin-bottom:12px}.node-picker-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:4px 0 0;color:var(--muted);font-size:.78rem}.node-picker-head span{color:var(--text);font-weight:700}.node-empty{margin:0;border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted);padding:12px;text-align:center}.compact-select select{min-height:38px}.select-field{position:relative}.select-field select{appearance:none;cursor:pointer;background-image:linear-gradient(45deg,transparent 50%,var(--text) 50%),linear-gradient(135deg,var(--text) 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 12px) 50%;background-size:6px 6px,6px 6px;background-repeat:no-repeat;padding-right:34px}.select-field select:hover{border-color:var(--line-strong);box-shadow:inset 0 0 0 1px var(--line-strong)}.context-actions{display:flex;flex-wrap:wrap;gap:12px}.api-config{display:grid;gap:10px}.api-config label{display:grid;gap:6px}.api-config span,.api-note{color:var(--muted);font-size:.82rem}.api-config input{width:100%;min-height:38px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);color:var(--text);padding:0 10px}.api-config input:focus,.answer-box textarea:focus,.search-field input:focus,.select-field select:focus{outline:0;border-color:var(--line-strong);box-shadow:0 0 0 3px #22283114}.api-start{width:100%;border-color:var(--text);background:var(--text);color:#eee;font-weight:750}.api-start:hover{background:#393e46}.api-start:disabled{cursor:wait;opacity:.68}.api-note{margin:12px 0 0}.context-return{display:inline-flex;margin-top:14px;border-bottom:1px solid var(--line-strong);font-size:.9rem}.chat-panel{min-height:720px;overflow:hidden}.chat-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding:14px 16px}.toolbar-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}.chat-toolbar>div{display:grid;gap:3px}.chat-toolbar button{padding:0 12px}.chat-alert,.chat-status{margin:14px 16px 0;border-radius:var(--radius);padding:10px 12px;font-size:.9rem}.chat-alert{border:1px solid var(--line-strong);background:color-mix(in srgb,#222831 8%,#eeeeee);color:var(--danger)}.chat-status{border:1px solid var(--accent);background:var(--accent-soft);color:var(--accent-strong)}.message-list{display:grid;align-content:start;justify-items:start;gap:14px;min-height:420px;max-height:560px;overflow:auto;padding:18px}.message{width:fit-content;max-width:min(78%,680px);align-self:start;border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:0 1px #22283108}.message span{display:block;color:var(--muted);font-size:.82rem;font-weight:800;margin-bottom:6px}.message-body{display:grid;gap:8px}.message-body>*{margin:0}.message-body h3,.message-body h4,.message-body h5{color:var(--text);font-size:.98rem;line-height:1.35}.message-body ul{padding-left:18px}.message-body li+li{margin-top:5px}.message-body blockquote{border-left:3px solid var(--line-strong);color:var(--muted);padding-left:10px}.message-body code{border:1px solid var(--line);border-radius:6px;background:var(--panel-strong);color:var(--text);padding:1px 5px}.message-body pre{max-width:100%;overflow:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel-strong);padding:10px}.message-body pre code{border:0;background:transparent;padding:0}.message-body p{margin:0}.from-coach{background:var(--panel-strong)}.from-user{justify-self:end;border-color:var(--accent);background:var(--accent-soft)}.answer-box{display:grid;gap:10px;border-top:1px solid var(--line);padding:16px}.answer-box textarea{width:100%;resize:vertical;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);color:var(--text);padding:12px}.answer-box>div{display:flex;align-items:center;justify-content:space-between;gap:12px}.answer-box button{padding:0 14px;white-space:nowrap}.answer-box button:disabled{cursor:wait;opacity:.68}.lab-guide-workspace .chat-panel{display:flex;flex-direction:column;height:100%;min-height:0;border:0;border-radius:0;box-shadow:none;overflow:hidden}.lab-guide-workspace .chat-toolbar{align-items:center;padding:14px 16px}.lab-guide-workspace .guide-chat-toolbar{flex:0 0 auto;min-height:74px}.lab-guide-workspace .chat-toolbar>div:first-child{gap:3px;min-width:0}.lab-guide-workspace .chat-toolbar small{display:inline-flex;flex:0 0 auto;margin-top:0;font-size:.78rem}.lab-guide-workspace .chat-alert{flex:0 0 auto;align-self:stretch;width:auto;max-height:none;overflow:visible;margin:16px 20px 0;border:1px solid var(--line-strong);border-radius:var(--radius);background:color-mix(in srgb,#222831 8%,#eeeeee);color:var(--text);padding:13px 14px;line-height:1.5;white-space:normal;overflow-wrap:anywhere}.lab-guide-workspace .message-list{flex:1 1 auto;min-height:0;max-height:none;overflow:auto;gap:16px;padding:22px;align-content:start}.lab-guide-workspace .answer-box{flex:0 0 auto;grid-template-rows:auto 104px auto;gap:10px;background:var(--panel);padding:14px 16px 16px}.lab-guide-workspace .answer-box textarea{height:104px;min-height:104px;max-height:104px;resize:none;background:#fff;line-height:1.55}.lab-guide-workspace .answer-box>div{display:grid;grid-template-columns:minmax(0,1fr) auto;min-height:38px;align-items:center}.lab-guide-workspace .guide-setup[hidden],.lab-guide-workspace .guide-conversation[hidden]{display:none}.author-section{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:24px;align-items:center;padding:30px 0 64px}.author-copy p{max-width:760px;color:var(--muted)}.author-tags{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px}.author-tags span{border:1px solid var(--line);border-radius:999px;background:var(--panel);color:var(--muted);padding:7px 12px}.page-head{padding:34px 0 24px}.page-head h1{font-size:clamp(1.9rem,3vw,2.8rem)}.toolbar{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:12px;margin:24px 0 22px}.search-field,.select-field{display:grid;gap:7px;color:var(--muted);font-size:.85rem}.search-field input,.select-field select{width:100%;min-height:44px;border:1px solid var(--line);border-radius:var(--radius);background-color:var(--panel);color:var(--text);padding:0 12px}.search-field input:hover,.select-field select:hover{border-color:var(--line-strong)}.knowledge-grid{grid-template-columns:repeat(auto-fit,minmax(340px,1fr));padding-bottom:18px}.pagination{display:flex;align-items:center;justify-content:center;gap:12px;padding:10px 0 60px}.pagination button{min-height:38px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);color:var(--muted);padding:0 14px;cursor:pointer}.pagination button:hover:not(:disabled){border-color:var(--line-strong);box-shadow:inset 0 0 0 1px var(--line-strong);color:var(--text);transform:translateY(-1px)}.pagination button:disabled{cursor:not-allowed;opacity:.42}.pagination span{min-width:140px;color:var(--muted);font-size:.86rem;text-align:center}.card-meta,.article-meta,.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.card-meta{justify-content:space-between;color:var(--soft);font-size:.85rem}.knowledge-card h2{margin-top:18px}.knowledge-card h2 a{color:var(--text)}.knowledge-card .tag-row{margin-top:auto;padding-top:12px}.tag-row span,.article-meta span{border-radius:999px;background:var(--panel-strong);border:1px solid var(--line);color:var(--muted);padding:4px 9px;font-size:.78rem}.empty-state{border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted);padding:22px;text-align:center}.article-layout{width:min(1080px,100%);margin:0 auto;padding:48px 0 80px}.back-link{display:inline-flex;margin-bottom:18px;color:var(--accent-strong)}.article-head{border-bottom:1px solid var(--line);padding-bottom:24px}.article-head h1{max-width:100%;font-size:clamp(1.65rem,2.3vw,2.35rem);line-height:1.2}.article-meta{margin-top:18px}.article-banner{display:block;width:100%;max-height:420px;object-fit:cover;border:1px solid var(--line);border-radius:var(--radius);margin:0 0 26px}.prereq-box{margin:22px 0;padding:16px}.prereq-box strong{display:block;margin-bottom:10px}.article-content{color:var(--text);font-size:1.02rem}.article-content h1{max-width:100%;margin-top:32px;font-size:1.5rem;line-height:1.3}.article-content h2{margin-top:28px;font-size:1.22rem;line-height:1.32}.article-content h3{margin-top:24px;font-size:1.04rem;line-height:1.35}.article-content li+li{margin-top:8px}.article-content img,.article-content video,.article-content iframe,.article-content embed{max-width:100%;border-radius:var(--radius)}.article-content img,.article-content video{display:block;height:auto;margin:18px 0;border:1px solid var(--line)}.article-content iframe,.article-content embed{width:100%;border:1px solid var(--line);margin:18px 0}.article-content code{border:1px solid var(--line);border-radius:6px;background:var(--panel-strong);color:var(--text);padding:1px 5px}.article-content pre{max-width:100%;overflow:auto;border:1px solid var(--line-strong);border-radius:var(--radius);background:#222831;color:#eee;padding:16px;line-height:1.55}.article-content pre code,.article-content pre code span{display:inline;border:0;background:transparent;color:#eee;padding:0}.article-content pre code{display:block;min-width:max-content}.article-cta{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-top:38px;border-top:1px solid var(--line);padding-top:24px}.article-cta h2{font-size:1.2rem}.article-cta p:not(.eyebrow){margin:8px 0 0;color:var(--muted)}.empty-module{display:grid;gap:10px;min-height:360px;align-content:center;border-top:1px solid var(--line);color:var(--muted)}.empty-module h1{color:var(--text);font-size:clamp(2rem,3vw,2.8rem)}.empty-module p{max-width:620px}@media(max-width:820px){.site-shell{width:min(100% - 22px,1180px)}.topbar,.main-nav,.hero-actions{align-items:stretch}.topbar,.workspace-hero,.coach-head,.coach-layout,.coach-layout.compact,.section-grid,.toolbar,.author-section{grid-template-columns:1fr}.topbar{display:grid;margin:0 -11px;padding-right:11px;padding-left:11px}.main-nav a,.button{flex:1;text-align:center}.recent-post-item{grid-template-columns:auto 1fr;gap:7px 10px}.recent-post-item span,.recent-post-item small{grid-column:1 / -1}.workspace-hero{min-height:auto;padding-top:18px}.identity-panel{min-height:auto;padding:24px}.module-grid,.lesson-grid,.knowledge-grid{grid-template-columns:1fr}.chat-panel{min-height:auto}.graphics-lab,.graphics-lab.is-editor-expanded{grid-template-columns:1fr}.graphics-lab.is-editor-expanded .lab-preview-panel{display:none}.lab-preview-panel,.lab-editor-panel,.lab-canvas-wrap,.lab-editor-shell{min-height:360px}.lab-panel-head,.lab-toolbar,.lab-file-tabs{align-items:stretch}.lab-panel-head{display:grid}.lab-toolbar button,.lab-toolbar-link,.lab-file-tabs button{flex:1}.coach-layout.is-left-collapsed{grid-template-columns:1fr}.coach-layout.is-left-collapsed .coach-sidebar{display:none}.message{width:100%}.answer-box>div,.article-cta,.inline-heading{display:grid}.author-tags{justify-content:flex-start}h1{font-size:2.1rem}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:1ms!important;scroll-behavior:auto!important;transition-duration:1ms!important}}
