:root{color-scheme:dark;--bg:#101720;--panel:#17222d;--panel2:#1b2936;--border:#334151;--text:#f2ecdf;--muted:#9cabb8;--accent:#db8657;--gold:#f2cb8e}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--text);background:var(--bg)}button,a{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,.stage:focus-visible{outline:2px solid var(--gold);outline-offset:3px}.shell{min-height:100dvh;display:flex;flex-direction:column}.topbar{height:74px;flex:none;display:flex;justify-content:space-between;align-items:center;padding:0 clamp(16px,3vw,38px);border-bottom:1px solid var(--border);background:#121b25}.brand{display:flex;align-items:center;gap:13px}.brandmark{height:40px;width:40px;display:grid;place-items:center;font-weight:800;font-size:24px;border-radius:10px;background:linear-gradient(135deg,#b44d3d,#e4a36b);color:#fff}.brand strong{display:block;letter-spacing:.11em;font-size:14px}.brand small{display:block;margin-top:3px;letter-spacing:.18em;font-size:9px;color:var(--muted)}.header-right{display:flex;align-items:center;gap:13px}.version{font-size:11px;color:var(--gold);padding:6px 10px;border:1px solid #6b5944;border-radius:50px}.meta-button,.icon-button,.tool-button{color:var(--text);background:transparent;border:1px solid var(--border);border-radius:9px;padding:10px 12px}.meta-button{font-size:12px}.icon-button:hover,.tool-button:hover,.meta-button:hover{background:#2c3c4c}.mobile-menu{display:none}.workspace{flex:1;min-height:0;display:flex}.sidebar{width:260px;flex:none;border-right:1px solid var(--border);display:flex;flex-direction:column;padding:28px 18px;background:#14202b}.eyebrow{font-size:10px;letter-spacing:.17em;font-weight:800;color:var(--accent)}.sidebar h2{font-size:19px;margin:10px 0 23px}.nav-link{width:100%;background:#293647;border:1px solid #435063;color:var(--text);text-align:left;padding:13px;border-radius:9px;font-size:13px}.nav-link span{font-size:20px;margin-right:10px;color:var(--gold)}.sidebar-section{padding:30px 8px}.subtle{font-size:12px;line-height:1.75;color:var(--muted)}.sidebar-bottom{margin-top:auto;border-top:1px solid var(--border);padding-top:20px;display:flex;flex-direction:column;gap:13px;font-size:11px}.sidebar-bottom a,.empty-state a{color:var(--gold);text-decoration:none}.sidebar-bottom span{color:var(--muted)}.main{min-width:0;min-height:0;flex:1;display:flex;flex-direction:column}.canvas-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:17px 24px;border-bottom:1px solid var(--border);background:#15212d}.canvas-bar h1{font-size:17px;margin:6px 0 0}.tools{display:flex;align-items:center;gap:7px}.tool-button{width:36px;height:36px;padding:0;font-size:19px}.zoom-readout{min-width:50px;text-align:center;font-size:12px;color:var(--muted)}.stage{min-height:440px;flex:1;position:relative;overflow:hidden;background:#111921;touch-action:none;cursor:grab}.stage.dragging{cursor:grabbing}.stage-grid{position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(#ffffff0b 1px,transparent 1px),linear-gradient(90deg,#ffffff0b 1px,transparent 1px);background-size:24px 24px}.diagram-layer{position:absolute;top:0;left:0;transform-origin:0 0;will-change:transform;user-select:none}.diagram-layer img{display:block;max-width:none;pointer-events:none}.empty-state{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);text-align:center;max-width:410px;width:calc(100% - 40px);padding:28px;background:#1b2936e8;border:1px solid #485466;border-radius:18px;box-shadow:0 16px 54px #0006}.empty-symbol{font-size:42px;color:var(--gold);margin-bottom:8px}.empty-state h2{font-size:24px;margin:12px 0}.empty-state p{font-size:13px;line-height:1.8;color:var(--muted)}.empty-state code{color:var(--gold)}.empty-state a{display:inline-block;margin-top:10px;font-size:12px}.stage-hint{position:absolute;bottom:16px;left:18px;color:#b5bfcc;background:#15212dcf;font-size:11px;padding:10px 13px;border:1px solid #344251;border-radius:8px;pointer-events:none}.statusbar{display:flex;justify-content:space-between;gap:16px;padding:12px 22px;background:#15212d;border-top:1px solid var(--border);font-size:11px;color:var(--muted)}.meta-dialog{max-width:510px;width:calc(100% - 28px);padding:25px;background:#1b2936;color:var(--text);border:1px solid #637083;border-radius:16px;box-shadow:0 25px 100px #0009}.meta-dialog::backdrop{background:#02070ad9}.modal-header{display:flex;justify-content:space-between;align-items:flex-start}.modal-header h2{margin:7px 0 16px}.meta-fields{margin:4px 0}.meta-fields>div{border-top:1px solid #3a4655;padding:13px 0;display:grid;grid-template-columns:42% 1fr;gap:12px;font-size:13px}.meta-fields dt{color:var(--muted)}.meta-fields dd{margin:0;overflow-wrap:anywhere}.modal-note{font-size:11px;line-height:1.7;color:var(--muted)}@media(max-width:800px){.topbar{height:64px;padding:0 13px}.brand strong{font-size:12px}.brand small{font-size:8px}.brandmark{width:36px;height:36px}.mobile-menu{display:block}.meta-button{font-size:0;padding:9px}.meta-button span{font-size:17px}.header-right{gap:7px}.version{font-size:9px}.sidebar{position:fixed;z-index:20;top:64px;bottom:0;left:0;transform:translateX(-105%);transition:transform .25s;width:min(280px,85vw);box-shadow:20px 0 40px #0007}.sidebar.open{transform:translateX(0)}.canvas-bar{padding:14px 12px;flex-direction:column;align-items:stretch;gap:13px}.canvas-bar h1{font-size:16px}.tools{justify-content:space-between}.stage{min-height:calc(100dvh - 235px)}.stage-hint{font-size:10px;left:9px;bottom:8px}.statusbar{font-size:10px;padding:10px 12px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}
/* Native diagrams.net viewer: ensure it owns the diagram stage */
.drawio-viewer{position:absolute;inset:0;z-index:2;overflow:auto;background:#fff;touch-action:auto}
.drawio-viewer[hidden]{display:none}
.drawio-viewer .mxgraph{max-width:100%}
#customZoomTools[hidden]{display:none}
.stage-hint{z-index:3}