:root{
  --bg: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --card: #f8fafc;
  --card2: #f1f5f9;
  --border: #e5e7eb;
  --accent: #0f172a;
  --accent2: #334155;
  --link: #1d4ed8;
  --warnBg: #fff7ed;
  --warnBorder: #fed7aa;
  --shadow: rgba(0,0,0,0.08);
  --codeBg: #0b1020;
  --codeText: #e5e7eb;
}

:root[data-theme="dark"]{
  --bg: #0b1020;
  --text: #e5e7eb;
  --muted: #a1a1aa;
  --card: #111827;
  --card2: #0f172a;
  --border: #253047;
  --accent: #e5e7eb;
  --accent2: #cbd5e1;
  --link: #93c5fd;
  --warnBg: #1b140a;
  --warnBorder: #7c4a16;
  --shadow: rgba(0,0,0,0.35);
  --codeBg: #050814;
  --codeText: #e5e7eb;
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.55;
  background: var(--bg);
  color: var(--text);
}

a{ color: var(--link); text-decoration: none; }
a:hover{ text-decoration: underline; }

.skip-link{
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--card);
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 10px;
  z-index: 999;
}
.skip-link:focus{ left: 10px; top: 10px; }

.topbar{
  position: sticky;
  top: 0;
  z-index: 100;
  display:flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(10px);
}

.topbar__left{ display:flex; gap: 14px; align-items: center; }
.logo{
  width: 44px; height: 44px;
  display:grid; place-items:center;
  border-radius: 14px;
  background: var(--card2);
  border: 1px solid var(--border);
  font-weight: 800;
  letter-spacing: 0.5px;
}
.title{ font-weight: 800; font-size: 15px; }
.subtitle{ font-size: 12px; color: var(--muted); margin-top: 2px; }
.topbar__right{ display:flex; gap: 10px; align-items:center; }

.layout{
  display:grid;
  grid-template-columns: 320px 1fr;
  min-height: calc(100vh - 60px);
}
.sidebar{
  border-right: 1px solid var(--border);
  padding: 18px;
}
.sidebar__section{
  margin-bottom: 18px;
  padding-bottom: 18px;
  border-bottom: 1px dashed color-mix(in srgb, var(--border) 65%, transparent);
}
.sidebar__label{
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 8px;
}
.navlink{
  display:block;
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--text);
  border: 1px solid transparent;
}
.navlink:hover{
  background: var(--card2);
  border-color: var(--border);
  text-decoration: none;
}

.content{
  padding: 26px 26px 80px;
  max-width: 1100px;
}

.section{ margin-bottom: 44px; }
.section h2{
  margin: 0 0 10px;
  font-size: 26px;
  letter-spacing: -0.01em;
}
.section h3{
  margin: 18px 0 8px;
  font-size: 16px;
  letter-spacing: -0.01em;
}
p{ margin: 10px 0; }

.muted{ color: var(--muted); }

.grid2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 12px;
}
@media (max-width: 980px){
  .layout{ grid-template-columns: 1fr; }
  .sidebar{ position: static; border-right: none; border-bottom: 1px solid var(--border); }
  .grid2{ grid-template-columns: 1fr; }
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 14px;
  box-shadow: 0 10px 30px var(--shadow);
}
.card__title{ font-weight: 750; margin-bottom: 8px; }
.card__body{ margin: 0; color: var(--text); }
.card__body li{ margin-bottom: 6px; }

.callout{
  margin-top: 14px;
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 14px;
}
.callout--warn{
  background: var(--warnBg);
  border-color: var(--warnBorder);
}
.callout__title{ font-weight: 800; margin-bottom: 6px; }
.callout__body{ margin: 0; }

.details{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 10px 12px;
  margin-top: 12px;
}
.details summary{
  cursor: pointer;
  font-weight: 700;
}
.details__body{ padding: 8px 2px 2px; }

.bullets, .steps{
  margin: 0;
  padding-left: 18px;
}
.steps li{ margin-bottom: 6px; }
.pill{
  display:inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--card2);
  border: 1px solid var(--border);
  font-size: 12px;
  margin-left: 8px;
}

.btn{
  display:inline-flex;
  gap: 8px;
  align-items:center;
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card2);
  color: var(--text);
  font-weight: 650;
  cursor: pointer;
  box-shadow: 0 8px 20px var(--shadow);
}
.btn:hover{ filter: brightness(0.98); }
.btn--ghost{
  background: transparent;
  box-shadow: none;
}
.btn__icon{ font-size: 14px; }
.btn__label{ font-size: 13px; }
.select{
  background: var(--card2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 12px;
  padding: 8px 10px;
}
.field{ display:flex; flex-direction: column; gap: 6px; }
.field__label{ font-size: 12px; color: var(--muted); }

.codeblock{
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow:hidden;
  background: var(--codeBg);
  color: var(--codeText);
}
.codeblock__header{
  display:flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 35%, transparent);
  background: color-mix(in srgb, var(--codeBg) 75%, black);
}
.codeblock__title{
  font-weight: 700;
  font-size: 13px;
  color: var(--codeText);
}
.codeblock__note{
  padding: 10px 12px;
  color: color-mix(in srgb, var(--codeText) 82%, var(--muted));
  border-top: 1px solid color-mix(in srgb, var(--border) 35%, transparent);
  background: color-mix(in srgb, var(--codeBg) 85%, black);
}
pre{ margin: 0; padding: 12px; overflow:auto; }
code{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; font-size: 12.5px; }

.diagramWrap{
  display:grid;
  grid-template-columns: 1fr 320px;
  gap: 14px;
  margin-top: 14px;
}
@media (max-width: 980px){
  .diagramWrap{ grid-template-columns: 1fr; }
}
.diagram{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 10px;
}
.diagramHint{ margin-top: 8px; font-size: 12px; }

.diagramDetail{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 12px;
}
.diagramDetail__title{ font-weight: 800; margin-bottom: 8px; }
.diagramDetail__body{ color: var(--text); }

.node{
  fill: var(--card2);
  stroke: var(--border);
  stroke-width: 1.3;
  filter: url(#shadow);
  cursor: pointer;
}
.node:hover{ filter: brightness(0.98) url(#shadow); }
.node.is-active{
  stroke: color-mix(in srgb, var(--link) 80%, white);
  stroke-width: 2.3;
}
.nodeText{ fill: var(--text); font-size: 16px; font-weight: 800; }
.nodeSub{ fill: var(--muted); font-size: 12px; font-weight: 600; }
.arrow{
  fill: none;
  stroke: color-mix(in srgb, var(--muted) 75%, transparent);
  stroke-width: 2.3;
  marker-end: none;
}

.roleTabs{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.tab{
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-weight: 650;
}
.tab.is-active{
  background: var(--card2);
  box-shadow: 0 8px 20px var(--shadow);
}
.rolePanel{
  margin-top: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 14px;
}

.simControls{
  display:grid;
  grid-template-columns: 1.2fr 1fr 1fr auto;
  gap: 12px;
  align-items: end;
  margin-top: 14px;
}
@media (max-width: 980px){
  .simControls{ grid-template-columns: 1fr; }
}
.controls{ display:flex; gap: 10px; }

.simGrid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 14px;
}
@media (max-width: 980px){
  .simGrid{ grid-template-columns: 1fr; }
}
.simLog{ grid-column: 1 / -1; }
.meter{
  width: 100%;
  height: 12px;
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow:hidden;
}
.meter__bar{
  height: 100%;
  background: color-mix(in srgb, var(--link) 70%, #7c3aed);
  width: 0%;
  transition: width 120ms ease-out;
}
.simStats{
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}
.agentList{
  display:flex;
  flex-direction: column;
  gap: 8px;
}
.agentRow{
  display:flex;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card2);
  font-size: 13px;
}
.agentRow__left{ display:flex; gap: 10px; align-items:center; }
.agentBadge{
  width: 24px; height: 24px; border-radius: 999px;
  display:grid; place-items:center;
  border: 1px solid var(--border);
  background: var(--card);
  font-weight: 800;
  font-size: 12px;
}
.agentState{ color: var(--muted); }

.log{
  height: 220px;
  overflow:auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card2);
  padding: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12px;
  white-space: pre-wrap;
}
.logLine{
  margin-bottom: 6px;
}

.refs{ padding-left: 18px; }
.footer{ margin-top: 16px; padding-top: 10px; border-top: 1px solid var(--border); }