/* Instrument design system v1 — shared for print-agent demos */
@font-face{
  font-family:"IS Fallback";
  src:local("Georgia");
  size-adjust:88%;
  ascent-override:105%;
  descent-override:35%;
  line-gap-override:0%;
}
@font-face{
  font-family:"Instrument Serif";
  src:url("fonts/instrument-serif-400-latin-basic-kern.woff2") format("woff2");
  font-weight:400;font-style:normal;font-display:swap;
}
@font-face{
  font-family:"JetBrains Mono";
  src:url("fonts/jetbrains-mono-400-latin-basic-noliga.woff2") format("woff2");
  font-weight:400;font-style:normal;font-display:swap;
}

:root{
  color-scheme:light;
  --bg:#f7f8fa; --surface:#eef1f6; --well:#ffffff;
  --ink:#1a1d26; --dim:#596478; --faint:#788399; --rule:#ccd3e0;
  --acc:#4355e8; --acc-2:#3041c6;
  --amber:#e9ad27; --amber-ink:#805500; --red:#cc3559;
  --wall-bg:#fff0f3; --glow:rgba(67,85,232,.09); --grain:0;
  --btn-fg:#ffffff;
  --edge:#29334c; --pixel-shadow:#c3cde1;
  --violet:#8552db; --mint:#168065; --mint-soft:#dcf6ec;
  --plate-top:#e1e7fa; --plate-bottom:#c6d3ef; --car-fill:#a5b0ff;
  --ease:cubic-bezier(.16,.84,.24,1);
  --spring:cubic-bezier(.34,1.56,.64,1);
  --serif:"Instrument Serif","IS Fallback","Songti SC","Noto Serif CJK SC","Source Han Serif SC",serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",Roboto,sans-serif;
  --t-display:clamp(2.5rem,1.6rem + 3.6vw,4.5rem);
  --t-title:2rem;
  --t-lead:1.125rem;
  --t-body:15px;
  --t-ui:14px;
  --t-label:11px;
  --t-code:13.5px;
  --r-well:10px;
  --r-input:8px;
  --r-chip:999px;
  --pl:max(clamp(1.25rem,3.2vw,4rem),env(safe-area-inset-left));
  --pr:max(clamp(1.25rem,3.2vw,4rem),env(safe-area-inset-right));
}
[data-theme="dark"]{
  color-scheme:dark;
  --bg:#10141f; --surface:#1b2233; --well:#171d2b;
  --ink:#edf1ff; --dim:#abb7ce; --faint:#8491ab; --rule:#35415b;
  --acc:#a5b2ff; --acc-2:#c3cbff;
  --amber:#f5c45b; --amber-ink:#f5c45b; --red:#ff829c;
  --wall-bg:#2c1b2a; --glow:rgba(165,178,255,.12); --grain:0;
  --btn-fg:#14192a; --edge:#8998be; --pixel-shadow:#080d18;
  --violet:#c3a0ff; --mint:#73dfb8; --mint-soft:#18392f;
  --plate-top:#2c3857; --plate-bottom:#192239; --car-fill:#566bb7;
}

*,*::before,*::after{box-sizing:border-box}
html{font-synthesis:none;-webkit-text-size-adjust:100%}
body{
  margin:0;min-height:100vh;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:var(--t-body);line-height:1.55;
  position:relative;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:9999;
  opacity:var(--grain);mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}
[data-theme="dark"] body::before,
:root:not([data-theme="light"]) body::before{
  /* handled below via media when dark */
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) body::before{mix-blend-mode:screen}
}
[data-theme="dark"] body::before{mix-blend-mode:screen}
@media (prefers-contrast:more),(forced-colors:active){
  body::before{display:none}
  :root{--rule:var(--dim)}
}

button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:none;background:none;padding:0}
a{color:var(--acc);text-decoration:none}
a:hover{color:var(--acc-2)}
:focus-visible{outline:2px solid var(--acc);outline-offset:2px}

.label,.spec{
  font-family:var(--mono);font-size:var(--t-label);letter-spacing:.12em;
  text-transform:uppercase;color:var(--dim);
}
:lang(zh) .label,:lang(zh) .spec,:lang(zh-Hans) .label,:lang(zh-Hans) .spec{
  letter-spacing:.04em;text-transform:none;
}
.display{font-family:var(--serif);font-size:var(--t-display);line-height:1;letter-spacing:-.01em;text-wrap:balance;font-synthesis:none}
.title{font-family:var(--serif);font-size:var(--t-title);line-height:1.1;font-synthesis:none}
.mono{font-family:var(--mono)}

.well{
  background:var(--well);border:1px solid var(--rule);border-radius:var(--r-well);
  position:relative;
}
.well.cross::before,.well.cross::after{
  content:"";position:absolute;width:9px;height:9px;pointer-events:none;
  background:
    linear-gradient(var(--faint),var(--faint)) center/9px 1px no-repeat,
    linear-gradient(var(--faint),var(--faint)) center/1px 9px no-repeat;
}
.well.cross::before{top:6px;left:6px}
.well.cross::after{top:6px;right:6px}
.well.cross .cross-bl,.well.cross .cross-br{
  position:absolute;width:9px;height:9px;pointer-events:none;bottom:6px;
  background:
    linear-gradient(var(--faint),var(--faint)) center/9px 1px no-repeat,
    linear-gradient(var(--faint),var(--faint)) center/1px 9px no-repeat;
}
.well.cross .cross-bl{left:6px}
.well.cross .cross-br{right:6px}

.tick-ruler{
  display:flex;height:10px;gap:0;align-items:flex-end;
  border-bottom:1px solid var(--rule);
}
.tick-ruler i{
  flex:1;height:4px;background:var(--faint);opacity:.55;
  transition:background .4s var(--ease),opacity .4s var(--ease);
}
.tick-ruler i:nth-child(4n){height:7px}
.tick-ruler i.on{background:var(--amber);opacity:1}
.tick-ruler i.done{background:var(--acc);opacity:1}
[data-state="done"] .tick-ruler i.on{background:var(--acc)}

.ring{
  --c:var(--acc);--a:90deg;--sz:14px;--w:2px;
  width:var(--sz);aspect-ratio:1;border-radius:50%;flex-shrink:0;
  background:
    conic-gradient(var(--c) var(--a),transparent 0),
    repeating-conic-gradient(var(--faint) 0 2deg,transparent 2deg 7.5deg);
  -webkit-mask:radial-gradient(farthest-side,transparent calc(100% - var(--w)),#000 0);
          mask:radial-gradient(farthest-side,transparent calc(100% - var(--w)),#000 0);
  transition:box-shadow .4s var(--ease);
}
.ring.lg{--sz:64px;--w:3px}
.ring.md{--sz:28px;--w:2.5px}
[data-state="idle"] .ring{--c:var(--acc);--a:90deg;animation:ring-breath 4s ease-in-out infinite}
[data-state="armed"] .ring{--c:var(--amber);--a:360deg;box-shadow:0 0 12px rgba(230,181,74,.35)}
[data-state="processing"] .ring{--c:var(--amber);--a:90deg;animation:ring-spin 1.2s linear infinite;box-shadow:0 0 12px rgba(230,181,74,.45)}
[data-state="done"] .ring{--c:var(--acc);--a:360deg;box-shadow:0 0 10px var(--glow)}
[data-state="error"] .ring{--c:var(--red);--a:360deg;animation:ring-blink .12s 2 steps(1)}
@keyframes ring-breath{0%,100%{opacity:.7}50%{opacity:1}}
@keyframes ring-spin{to{transform:rotate(360deg)}}
@keyframes ring-blink{50%{opacity:.35}}

.state-line{
  font-family:var(--mono);font-size:var(--t-label);letter-spacing:.1em;
  text-transform:uppercase;color:var(--dim);white-space:nowrap;
}
[data-state="processing"] .state-line{color:var(--amber-ink)}
[data-state="done"] .state-line{color:var(--acc)}
[data-state="error"] .state-line{color:var(--red)}
:lang(zh) .state-line,:lang(zh-Hans) .state-line{letter-spacing:.04em;text-transform:none}

.btn{
  height:32px;padding:0 14px;border-radius:var(--r-input);
  border:1px solid var(--rule);background:var(--surface);color:var(--ink);
  font-size:var(--t-ui);font-weight:500;
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  transition:background .12s,box-shadow .12s,transform .1s;
}
.btn:hover{background:var(--well)}
.btn:active{transform:scale(.98)}
.btn.primary{
  background:var(--acc);border-color:transparent;color:var(--btn-fg);font-weight:560;
}
.btn.primary:hover{box-shadow:0 0 0 4px var(--glow);background:var(--acc-2)}
.btn.ghost{background:transparent}
.btn.sm{height:28px;padding:0 10px;font-size:12px}
.btn:disabled{opacity:.45;cursor:default;transform:none}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-chip);
  border:1px solid var(--rule);background:var(--surface);
  font-family:var(--mono);font-size:10px;letter-spacing:.06em;
  color:var(--dim);text-transform:uppercase;
}
:lang(zh) .chip,:lang(zh-Hans) .chip{letter-spacing:.02em;text-transform:none}
.chip.on{border-color:var(--acc);color:var(--acc);background:var(--glow)}

.wall-strip{
  height:40px;background:var(--wall-bg);border-top:1px solid var(--rule);
  display:flex;align-items:center;justify-content:center;padding:0 16px;
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--red);flex-shrink:0;
}
:lang(zh) .wall-strip,:lang(zh-Hans) .wall-strip{letter-spacing:.06em;text-transform:none}

.site-header{
  height:56px;display:flex;align-items:center;gap:12px;
  padding:0 var(--pl) 0 var(--pr);
  border-bottom:1px solid var(--rule);background:var(--bg);
  position:relative;z-index:30;flex-shrink:0;
}
.site-header .brand{
  display:flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:var(--t-label);letter-spacing:.12em;
  text-transform:uppercase;color:var(--dim);
}
.site-header .brand .div{width:1px;height:14px;background:var(--rule)}
.site-header .tool-name{font-size:14px;font-weight:500;color:var(--ink);letter-spacing:0;text-transform:none;font-family:var(--sans)}
.site-header .right{margin-left:auto;display:flex;align-items:center;gap:8px}
.theme-pill{
  height:26px;padding:0 10px;border-radius:var(--r-chip);
  border:1px solid var(--rule);background:var(--surface);
  font-family:var(--mono);font-size:10px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--dim);
}
.theme-pill:hover{color:var(--ink)}
.back-link{
  font-family:var(--mono);font-size:10px;letter-spacing:.08em;
  color:var(--dim);text-transform:uppercase;
}
.back-link:hover{color:var(--acc)}

.toast{
  position:fixed;bottom:56px;left:50%;transform:translateX(-50%) translateY(12px);
  background:var(--well);border:1px solid var(--rule);padding:10px 16px;
  border-radius:var(--r-input);font-size:12px;color:var(--ink);
  opacity:0;transition:opacity .24s var(--ease),transform .24s var(--ease);
  z-index:80;pointer-events:none;font-family:var(--mono);
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

.err-hatch{
  background:repeating-linear-gradient(45deg,rgba(163,36,28,.08) 0 4px,transparent 4px 8px);
  border:1px solid color-mix(in srgb,var(--red) 35%,transparent);
  color:var(--red);border-radius:var(--r-input);padding:10px 12px;font-size:12px;
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  [data-state="processing"] .ring{--a:270deg}
  .ring{opacity:1!important}
}
@media (max-width:520px){
  .site-header{height:52px;padding:0 14px}
  .site-header .brand span.hide-sm{display:none}
}

/* v3 · shared spatial stage and quiet controls */
[hidden]{display:none!important}
.farm-dot{display:inline-flex;align-items:center;gap:7px;color:var(--dim);font-size:12px;padding:10px}
.farm-dot::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--acc)}
.stage-bed{position:relative;width:min(76%,540px);aspect-ratio:1.1;border:1px solid var(--rule);border-radius:10px;overflow:hidden;background:linear-gradient(var(--rule) 1px,transparent 1px),linear-gradient(90deg,var(--rule) 1px,transparent 1px),var(--well);background-size:24px 24px;transform:rotateX(36deg) rotateZ(-12deg);touch-action:none}
.stage-bed[data-view=top]{transform:none}.stage-bed[data-view=front]{transform:rotateX(65deg)}
.stage-bed.empty::after{content:"＋";position:absolute;inset:0;display:grid;place-items:center;color:var(--dim)}
.stage-model{position:absolute;width:28%;height:36%;color:var(--acc);pointer-events:none}
.stage-model .solid{position:absolute;inset:0;clip-path:polygon(15% 80%,30% 76%,35% 32%,44% 17%,60% 17%,69% 33%,74% 76%,88% 80%,82% 95%,22% 95%);background:repeating-linear-gradient(0deg,transparent 0 5px,var(--well) 5px 6px),var(--acc);opacity:.85}
.stage-model::before{content:"";position:absolute;inset:var(--cut,0%) 0 0;border-top:2px solid var(--acc);background:var(--glow);z-index:2}
.stage-model.supported::after{content:"";position:absolute;inset:35% 8% 4%;background:repeating-linear-gradient(90deg,var(--acc) 0 2px,transparent 2px 12px);opacity:.4}
.suggestion-chips{display:flex;gap:6px;flex-wrap:wrap;align-items:flex-start;width:100%;margin:0}.suggestion-chips button{min-height:32px}
.stop-btn{color:var(--amber-ink)}
.workbench-panel{min-width:0;min-height:0;display:flex;flex-direction:column;border-left:1px solid var(--rule)}
.workbench-panel .panel-head{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;border-bottom:1px solid var(--rule)}
.workbench-panel iframe{width:100%;flex:1;border:0;min-height:0;background:var(--bg)}
.app.split{grid-template-columns:minmax(320px,1fr) minmax(360px,1.1fr)}.app.split>.preview{display:none}
button.chip{min-height:36px}.tool-rail button{min-height:44px}
@media(max-width:900px){.app.split{grid-template-columns:1fr;grid-template-rows:minmax(240px,1fr) minmax(260px,1fr)}.workbench-panel{border-left:0;border-top:1px solid var(--rule)}}

.stage-model .solid{mask-image:linear-gradient(to bottom,transparent 0 var(--cut,0%),#000 var(--cut,0%) 100%)}
.agent-toggle{display:none}@media(max-width:760px){.agent-toggle{display:inline-flex}.workspace .agent-panel.open{display:block;position:absolute;right:0;top:54px;bottom:100px;width:min(280px,82vw);background:var(--bg);z-index:25}}.embed .agent-toggle{display:inline-flex}.embed .agent-panel.open{display:block;position:absolute;right:0;top:48px;bottom:60px;width:min(260px,80vw);background:var(--bg);z-index:25}

/* WebGL hosts replace the former CSS perspective plate. */
.stage-bed.webgl-bed,.stage-bed.webgl-bed[data-view]{transform:none;width:100%;height:100%;aspect-ratio:auto;background:var(--well);border:0;border-radius:0;min-height:160px}
.stage:has(.webgl-bed){display:block;position:relative}
.preview-stage:has(.webgl-bed){display:block;padding:0}
.webgl-bed canvas{display:block;width:100%;height:100%}
.stage-bed.webgl-bed::after{content:none}
.embed .stage-bed.webgl-bed{width:100%}
.webgl-fallback{height:100%;display:grid;place-items:center;padding:24px;font:11px var(--mono);color:var(--dim);background:repeating-linear-gradient(90deg,transparent 0 23px,var(--rule) 24px)}
.suggestion-chip{text-align:left;display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:6px 8px;min-width:0;max-width:100%;border-radius:8px}
.suggestion-chip .label{font-size:12px;color:var(--ink);max-width:18ch;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.suggestion-chip .reason,.agent-card .reason{font:11px/1.45 var(--mono);letter-spacing:.02em;color:var(--dim);white-space:normal;max-width:28ch}
.suggestion-chip .reason{max-width:18ch;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:1;overflow:hidden}
.agent-card .reason{margin:-6px 0 12px;white-space:normal}
.tool-num{display:block;font:10px var(--mono);letter-spacing:.1em;margin-bottom:4px;color:var(--faint)}
#layerHud{font:11px var(--mono);letter-spacing:.08em}

/* Small, hard-edged game accents; body text stays in the product sans. */
.btn,.theme-pill{border-radius:4px}
.btn.primary{background:var(--acc);color:var(--btn-fg);border:1px solid var(--edge);box-shadow:2px 2px 0 var(--pixel-shadow)}
.btn.primary:active{transform:translate(2px,2px);box-shadow:none}
.theme-pill{color:var(--ink);box-shadow:2px 2px 0 var(--pixel-shadow)}