:root{color-scheme:light dark;--bg:#fff;--panel:#fff;--canvas:#f9fafb;--ink:#202327;--muted:#68717a;--line:#e8eaed;--soft:#f3f5f6;--accent:#283c35;--accent-text:#fff;--dot:#dce0e3;--shadow:0 5px 18px #1c25340b;--selected:#477e68;--danger:#b34343;--blue:#3b6899;--green:#386d55;--orange:#895e28;--purple:#765397;--slate:#526772;--pink:#98435f;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft Yahei",sans-serif;font-size:14px}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg);overflow:hidden}button,input,select,textarea{font:inherit;color:inherit}button,select{cursor:pointer}button{border:1px solid var(--line);background:var(--panel);border-radius:8px;min-height:34px;padding:6px 12px;white-space:nowrap}button:hover{background:var(--soft)}button:disabled{opacity:.35;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--selected);outline-offset:3px}.primary{background:var(--accent);color:var(--accent-text);border-color:var(--accent)}.primary:hover{filter:brightness(1.15);background:var(--accent)}[hidden]{display:none!important}.app-header{height:68px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:28px;padding:0 25px;position:relative;z-index:10;background:var(--panel)}.brand{text-decoration:none;color:var(--ink);display:flex;gap:11px;align-items:center;font-size:19px;font-weight:650;letter-spacing:-.5px}.brand-mark{background:var(--accent);color:var(--accent-text);height:31px;width:31px;display:grid;place-content:center;position:relative;font-size:24px;border-radius:10px;font-weight:600}.brand-mark span{position:absolute;right:5px;bottom:0;color:#a6c9ac}.brand small{font-size:13px;font-weight:400;letter-spacing:0;color:var(--muted);margin-left:11px}.project-state{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:8px}.live-dot,.draft-dot{display:inline-block;height:6px;width:6px;border-radius:50%;background:#6b9a7b}.divider{margin:0 5px;color:var(--line)}.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}#save-state{font-size:11px;color:var(--muted);margin-right:12px}.header-actions .primary span{margin-left:16px}.app-layout{display:flex;height:calc(100dvh - 68px)}.sidebar{width:212px;flex:none;border-right:1px solid var(--line);padding:27px 14px 18px;display:flex;flex-direction:column;background:var(--panel);z-index:9}.side-title{padding:0 11px 15px;color:var(--muted);font-size:11px;letter-spacing:1px;display:flex;justify-content:space-between}.side-title span{color:var(--muted);font-size:10px}#boards{display:flex;flex-direction:column;gap:5px}.board-link{border:0;display:flex;align-items:center;gap:10px;text-align:left;width:100%;padding:10px 11px;font-size:13px;min-height:42px;color:var(--muted)}.board-link.active{color:var(--ink);background:var(--soft);font-weight:600}.board-icon{font-size:16px;width:18px;text-align:center}.board-link .count{margin-left:auto;font-size:10px;opacity:.7;font-weight:400}.add-board{margin-top:9px;border:0;text-align:left;color:var(--muted);font-size:12px}.side-section{border-top:1px solid var(--line);padding-top:23px;margin-top:26px}.legend-item{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted);padding:6px 12px}.legend-dot{width:7px;height:7px;border-radius:3px;background:var(--category)}.side-foot{margin-top:auto;padding:20px 10px 0;font-size:11px;color:var(--muted)}.side-foot p{font-size:11px;line-height:1.8;margin:10px 0 17px}.side-foot .draft-dot{margin-right:6px;background:#c39957}.side-foot button{padding:0;border:0;font-size:11px;color:var(--muted);display:flex;justify-content:space-between;width:100%;min-height:26px}kbd{font:10px inherit;border:1px solid var(--line);border-radius:4px;background:var(--soft);padding:1px 5px}.workspace{min-width:0;flex:1;display:flex;flex-direction:column}.board-header{height:107px;flex:none;display:flex;align-items:center;gap:15px;padding:20px 31px}.eyebrow{font-size:9px;letter-spacing:1.8px;color:var(--muted);font-weight:550;margin-bottom:7px}h1{font-size:23px;letter-spacing:-.5px;margin:0;font-weight:600}#board-subtitle{font-size:12px;color:var(--muted);margin:8px 0 0;line-height:1.5}.board-header>.primary{margin-left:auto;flex:none;font-size:12px}.mobile-nav{display:none}.canvas-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--panel);flex:none}.tool-group{display:flex;align-items:center;gap:5px}.tool{border-color:transparent;font-size:13px;padding:6px 10px;color:var(--muted)}.tool span{font-size:11px;margin-left:3px}.tool.active{background:var(--soft);color:var(--ink);border-color:var(--line)}select{background:var(--panel);border:1px solid var(--line);border-radius:6px;font-size:11px;padding:7px 5px;max-width:100%}.search{display:flex;align-items:center;color:var(--muted);gap:7px;font-size:19px;padding:0 9px;margin-right:8px}.search input{border:0;background:none;width:133px;min-width:0;outline-offset:2px;font-size:11px}.icon-button{border:0;color:var(--muted);font-size:20px;padding:2px 8px}.canvas-shell{display:flex;position:relative;flex:1;min-height:0;overflow:hidden}#stage{background:var(--canvas);background-image:radial-gradient(var(--dot) .8px,transparent .8px);background-size:20px 20px;position:relative;overflow:hidden;flex:1;min-width:0;touch-action:none;cursor:default}#stage.pan-mode{cursor:grab}#stage.connect-mode{cursor:crosshair}#world{position:absolute;inset:0;transform-origin:0 0;pointer-events:none}#nodes{position:absolute;inset:0;pointer-events:none}#edges{position:absolute;left:0;top:0;width:1px;height:1px;overflow:visible;pointer-events:none}#edge-layer .edge{pointer-events:auto;cursor:pointer}#edge-layer .edge-line{fill:none;stroke:#b6c1c5;stroke-width:1.8;marker-end:url(#arrow)}#edge-layer .edge-hit{fill:none;stroke:transparent;stroke-width:18}#edge-layer .edge-label-bg{fill:var(--canvas);stroke:var(--line);stroke-width:.7}#edge-layer .edge-label{fill:var(--muted);font-size:11px;text-anchor:middle;dominant-baseline:central}#edge-layer .edge.selected .edge-line{stroke:var(--selected);stroke-width:2.8}#edge-layer .edge.selected .edge-label{fill:var(--selected)}#edge-layer .edge.related .edge-line{stroke:var(--selected)}#pending-edge{stroke:var(--selected);stroke-width:2;stroke-dasharray:6 5;fill:none}.node{position:absolute;width:282px;height:184px;pointer-events:auto;background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:12px;user-select:none;touch-action:none;padding:16px 17px;cursor:grab;transition:box-shadow .15s,border-color .15s;overflow:visible}.node:hover{box-shadow:0 6px 22px #18253915;border-color:#bcc9c4}.node.selected,.node.pending{border:2px solid var(--selected);padding:15px 16px;box-shadow:0 0 0 4px color-mix(in srgb,var(--selected) 9%,transparent)}.node.dim{opacity:.2}.node .node-top{display:flex;align-items:center;gap:7px;font-size:10px;color:var(--muted)}.category-label{color:var(--category);font-weight:550}.node-id{margin-left:auto;font-family:ui-monospace,SFMono-Regular,monospace;font-size:9px;letter-spacing:.2px}.node h2{font-size:16px;font-weight:600;line-height:1.4;letter-spacing:-.3px;margin:12px 0 7px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.node .description{font-size:11px;color:var(--muted);line-height:1.75;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.node .node-footer{position:absolute;left:17px;right:17px;bottom:13px;display:flex;align-items:center;justify-content:space-between;font-size:10px;color:var(--muted)}.phase{background:var(--soft);padding:3px 7px;border-radius:4px}.phase.first{color:var(--selected);background:color-mix(in srgb,var(--selected) 9%,var(--panel))}.port{position:absolute;border:2px solid var(--panel);background:var(--category);box-shadow:0 0 0 1px var(--line);width:12px;min-height:12px;height:12px;padding:0;border-radius:50%;top:86px;cursor:crosshair;z-index:2}.port.in{left:-6px}.port.out{right:-6px}.port:before{content:"";position:absolute;inset:-9px}.port:hover{transform:scale(1.25);background:var(--selected)}.canvas-hint{position:absolute;left:21px;bottom:21px;font-size:10px;color:var(--muted);pointer-events:none}.zoom-controls{position:absolute;bottom:16px;right:18px;display:flex;align-items:center;border:1px solid var(--line);background:var(--panel);box-shadow:var(--shadow);border-radius:8px;padding:3px;gap:2px}.zoom-controls button{border:0;font-size:12px;padding:5px 9px;min-height:30px}.zoom-controls span{height:16px;width:1px;background:var(--line);margin:0 3px}.canvas-count{position:absolute;top:17px;left:21px;color:var(--muted);font-size:10px;pointer-events:none}#inspector{width:305px;flex:none;border-left:1px solid var(--line);background:var(--panel);padding:23px;overflow:auto}.inspector-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.inspector-head h2{font-size:15px;font-weight:600;margin:0}.inspector-head button{border:0;font-size:22px;padding:0 7px}.field{display:block;font-size:11px;color:var(--muted);margin-bottom:17px}.field input,.field textarea,.field select,#board-name{display:block;margin-top:7px;width:100%;border:1px solid var(--line);border-radius:7px;background:var(--panel);padding:9px 10px;font-size:12px;line-height:1.6;color:var(--ink)}.field textarea{resize:vertical;min-height:82px}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.field.readonly{font-size:11px;line-height:1.9}.inspector-note{font-size:10px;color:var(--muted);line-height:1.8;padding:12px 0;border-top:1px solid var(--line)}.inspector-actions{display:flex;gap:8px}.danger{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 30%,var(--line))}.related-list{border-top:1px solid var(--line);padding-top:15px;margin-top:18px;font-size:11px;color:var(--muted)}.related-list button{display:block;white-space:normal;text-align:left;font-size:11px;line-height:1.7;width:100%;margin-top:6px;padding:8px}.banner{padding:10px 25px;background:color-mix(in srgb,var(--orange) 10%,var(--panel));font-size:12px;line-height:1.6;color:var(--ink)}#toast{position:fixed;bottom:29px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--bg);border-radius:9px;padding:12px 20px;z-index:50;font-size:12px;box-shadow:var(--shadow);max-width:90vw}dialog{border:1px solid var(--line);border-radius:16px;background:var(--panel);color:var(--ink);width:min(470px,calc(100vw - 30px));padding:27px;box-shadow:0 18px 80px #0002}dialog::backdrop{background:#10182044;backdrop-filter:blur(3px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px}.dialog-head h2{font-size:20px;margin:0;font-weight:600}.close-dialog{font-size:24px;border:0;padding:0 9px}.dialog-head+p,dialog>p{font-size:12px;line-height:1.8;color:var(--muted)}.export-options{display:flex;flex-direction:column;gap:10px;margin-top:25px}.export-options button{display:grid;grid-template-columns:1fr 20px;text-align:left;padding:16px;white-space:normal;gap:6px}.export-options strong{font-weight:550;font-size:13px}.export-options span{font-size:11px;grid-row:2;color:var(--muted)}.export-options b{grid-column:2;grid-row:1/3;align-self:center;font-size:18px;font-weight:400}.help-list{list-style:none;padding:0;font-size:12px;line-height:2.8}.help-list kbd{display:inline-block;min-width:78px;margin-right:8px;text-align:center}#name-form>label{display:block;font-size:12px;color:var(--muted);margin:20px 0}#name-form>.primary{width:100%}#empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;pointer-events:none}#empty>span{font-size:35px;color:var(--muted)}#empty h2{font-size:20px;font-weight:550;margin:10px}#empty p{color:var(--muted);font-size:12px}#empty button{pointer-events:auto;margin-top:12px}
@media(prefers-color-scheme:dark){:root{--bg:#151719;--panel:#1c1f22;--canvas:#151719;--ink:#e7e9e9;--muted:#a0a8ae;--line:#32373c;--soft:#282d31;--accent:#b5d4bf;--accent-text:#18251d;--dot:#30363b;--shadow:0 5px 18px #0002;--selected:#9bbfa9;--blue:#8bb3e1;--green:#87bea2;--orange:#d1a66d;--purple:#b39ad3;--slate:#a6bbc7;--pink:#d696b0}#edge-layer .edge-line{stroke:#62727a}.node:hover{border-color:#61716a}.brand-mark span{color:#33523b}}
@media(max-width:1100px){.sidebar{width:182px;padding-left:9px;padding-right:9px}.board-header{padding-left:22px;padding-right:22px}.canvas-toolbar{padding:9px 15px}.search input{width:110px}.project-state{display:none}#inspector{position:absolute;right:0;top:0;bottom:0;z-index:6;box-shadow:-8px 0 24px #0001}.side-section{margin-top:15px;padding-top:18px}.app-header{padding:0 20px}}
@media(max-width:650px){.app-header{height:60px;padding:0 13px;gap:9px}.brand{font-size:17px;gap:8px}.brand small{display:none}.header-actions{gap:6px}#save-state{display:none}.header-actions button{font-size:11px;padding:6px 10px}.header-actions .primary span{margin-left:5px}.app-layout{height:calc(100dvh - 60px)}.sidebar{display:none;position:absolute;top:60px;bottom:0;left:0;width:225px;box-shadow:12px 0 40px #0002}.sidebar.open{display:flex}.board-header{height:106px;padding:16px;gap:9px;align-items:flex-start}.board-header>div{min-width:0;flex:1}h1{font-size:20px}#board-subtitle{font-size:10px;line-height:1.6;margin-top:6px;max-height:32px;overflow:hidden}.eyebrow{font-size:8px;letter-spacing:1px}.mobile-nav{display:block;min-width:34px}.board-header>.primary{font-size:11px;padding:6px 10px}.canvas-toolbar{padding:7px 10px;flex-wrap:wrap;gap:7px}.tool-group{gap:1px}.tool{padding:6px 8px;min-height:36px}.tool span{font-size:10px}.search-group{width:100%;justify-content:flex-end;border-top:1px solid var(--line);padding-top:4px}.search{margin-right:auto;flex:1;padding-left:5px}.search input{width:100%;font-size:12px}.canvas-hint{font-size:9px;left:12px;bottom:65px}.canvas-count{font-size:9px;left:12px;top:12px}.zoom-controls{right:10px;bottom:13px}.zoom-controls button{min-height:36px;min-width:34px}#inspector{width:min(330px,100%);padding:18px}.node{border-radius:10px}.help-list{font-size:11px}.side-foot{padding-top:12px}.side-section{margin-top:15px}.board-link{min-height:40px}#toast{bottom:80px;width:max-content;text-align:center;font-size:11px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
/* Canvas-first layout: all controls float above a full-height workspace. */
.app-layout{height:100dvh}.workspace{position:relative}.sidebar{padding-top:22px}.sidebar-collapsed .sidebar{display:none}.sidebar .side-title{align-items:center}.side-title #close-nav{border:0;padding:0 3px;font-size:20px;min-height:22px;color:var(--muted);line-height:1}.board-link{white-space:normal}.board-link>span:nth-child(2){min-width:0;flex:1;line-height:1.5}.board-link>.count{flex:none}.canvas-toolbar{position:absolute;top:12px;left:14px;right:14px;z-index:7;padding:0;border:0;background:none;pointer-events:none;gap:10px;align-items:flex-start}.canvas-toolbar>.tool-group{pointer-events:auto;padding:5px;background:var(--panel);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow)}.canvas-toolbar>.search-group{margin-left:auto}.canvas-toolbar>.file-actions{gap:5px}.canvas-shell{height:100%;width:100%}.canvas-count{top:78px;left:22px;font-size:10px}.canvas-hint{bottom:22px}.banner{position:absolute;top:76px;left:14px;right:14px;z-index:8;border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}#inspector{position:absolute;right:12px;top:75px;bottom:12px;z-index:8;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);width:320px}.side-foot #save-state{display:block;font-size:11px;margin:0}#stage{outline-offset:-3px}
@media(max-width:850px){.canvas-toolbar>.search-group{display:none}.canvas-toolbar{gap:7px}.tool span{display:none}.sidebar{position:absolute;left:0;top:0;bottom:0;width:212px;box-shadow:10px 0 30px #0002}.sidebar.open{display:flex}.sidebar-collapsed .sidebar{display:none}.canvas-toolbar>.file-actions{margin-left:auto}}
@media(max-width:650px){.app-layout{height:100dvh}.canvas-toolbar{top:8px;left:8px;right:8px;flex-wrap:wrap;gap:6px}.canvas-toolbar>.tool-group{padding:3px;gap:1px;max-width:100%}.canvas-toolbar select{font-size:10px;padding:7px 2px;max-width:68px}.tool{padding:5px 7px;min-height:34px;font-size:15px}.file-actions button{font-size:10px;padding:5px 8px;min-height:34px}.canvas-count{top:100px;left:13px;font-size:9px}.canvas-hint{bottom:65px;left:13px;font-size:9px}#inspector{left:8px;right:8px;top:100px;bottom:8px;width:auto}.banner{top:100px;left:8px;right:8px;padding:10px}.sidebar{top:0;width:225px;z-index:12}body:not(.sidebar-collapsed) .sidebar{display:flex}.file-actions #import{display:block}}