:root{
  --bg: #f3f3f3;
  --panel: #ffffff;
  --panel2: #f7f7f7;
  --text: #101418;
  --muted: #5a6470;

  --border: #d7dbe0;
  --shadow: rgba(0,0,0,.06);

  --accent: #2f6fed;
  --accent2: #1b4fd2;

  --danger: #c62828;
  --ok: #1b7f3a;

  --node-q-bg: #fdfdfd;
  --node-q-border: #263238;

  --node-r-bg: #ffffff;
  --node-r-border: #263238;

  --edge: rgba(21, 36, 55, .55);
  --edgeText: rgba(21, 36, 55, .8);

  --focus: 0 0 0 3px rgba(47,111,237,.25);

  --radius: 14px;
  --radius2: 10px;

  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

html[data-theme="dark"]{
  --bg: #0f1216;
  --panel: #171a20;
  --panel2: #12151b;
  --text: #e9eef5;
  --muted: #aab4c2;

  --border: #2a313b;
  --shadow: rgba(0,0,0,.35);

  --accent: #6ea0ff;
  --accent2: #3a7bff;

  --danger: #ef5350;
  --ok: #43a047;

  --node-q-bg: #151a22;
  --node-q-border: #e9eef5;

  --node-r-bg: #151a22;
  --node-r-border: #e9eef5;

  --edge: rgba(233,238,245, .55);
  --edgeText: rgba(233,238,245, .85);
}

html[data-theme="system"]{
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark){
  html[data-theme="system"]{
    --bg: #0f1216;
    --panel: #171a20;
    --panel2: #12151b;
    --text: #e9eef5;
    --muted: #aab4c2;

    --border: #2a313b;
    --shadow: rgba(0,0,0,.35);

    --accent: #6ea0ff;
    --accent2: #3a7bff;

    --danger: #ef5350;
    --ok: #43a047;

    --node-q-bg: #151a22;
    --node-q-border: #e9eef5;

    --node-r-bg: #151a22;
    --node-r-border: #e9eef5;

    --edge: rgba(233,238,245, .55);
    --edgeText: rgba(233,238,245, .85);
  }
}

*{ box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.35;
}

.skip-link{
  position: absolute;
  left: -999px;
  top: 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text);
  z-index: 9999;
}
.skip-link:focus{ left: 10px; outline: none; box-shadow: var(--focus); }

.topbar{
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.logo{
  width: 70px;
  height: auto;
  border-radius: 90px;
  display: grid;
  place-items: center;
  display: block;
}

.layout{
  padding: 18px;
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 16px;
}

@media (max-width: 980px){
  .layout{ grid-template-columns: 1fr; }
}

.card{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 10px 24px var(--shadow);
  padding: 14px;
}

.left .card{ margin-bottom: 14px; }

.right-head{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

h2{
  margin: 0 0 10px 0;
  font-size: 16px;
}
h3{
  margin: 10px 0 8px 0;
  font-size: 14px;
}

.muted{ color: var(--muted); }
.small{ font-size: 12px; }

.row{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin: 10px 0;
}

.grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.span2{ grid-column: 1 / -1; }

.label{
  display: block;
  font-size: 12px;
  margin-bottom: 6px;
  color: var(--muted);
}

.input, .textarea, select.input{
  width: 100%;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
  outline: none;
}
.textarea{
  resize: vertical;
  min-height: 140px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
  font-size: 12.5px;
}
.input:focus, .textarea:focus, select.input:focus{
  box-shadow: var(--focus);
  border-color: color-mix(in srgb, var(--accent) 60%, var(--border));
}

.btn{
  border: 1px solid transparent;
  background: var(--accent);
  color: white;
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
}
.btn:hover{ background: var(--accent2); }
.btn.secondary{
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn.secondary:hover{
  background: color-mix(in srgb, var(--panel2) 60%, transparent);
}

hr.sep{
  border: 0;
  border-top: 1px solid var(--border);
  margin: 12px 0;
}

.theme-field{
  display: flex;
  gap: 10px;
  align-items: center;
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 12px;
  margin: 0;
}
.theme-field legend{
  padding: 0 6px;
  color: var(--muted);
  font-size: 12px;
}
.radio{
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: var(--text);
}
.radio input{
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

.sim{
  margin-top: 10px;
  padding: 12px;
  border-radius: var(--radius2);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel2) 70%, transparent);
}
.sim-head{
  display:flex;
  gap:10px;
  align-items:center;
  margin-bottom: 10px;
}
.pill{
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 999px;
}
.sim-status{
  font-weight: 700;
  letter-spacing: .2px;
}
.sim-prompt{
  min-height: 58px;
  margin: 0;
}
.sim-actions{
  margin-top: 12px;
  display: grid;
  gap: 10px;
}

.choice-btn{
  text-align: left;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-weight: 600;
}
.choice-btn:hover{
  border-color: color-mix(in srgb, var(--accent) 60%, var(--border));
}
.choice-btn:focus{ outline: none; box-shadow: var(--focus); }

.canvasWrap{
  margin-top: 12px;
}
.canvas{
  position: relative;
  width: 100%;
  height: 520px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel2) 70%, transparent), transparent 70%);
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  overflow: hidden;
  outline: none;
}
.canvas:focus{
  box-shadow: var(--focus);
}

.edges{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.nodes{
  position: absolute;
  inset: 0;
}

.node{
  position: absolute;
  transform: translate(-50%, -50%);
  user-select: none;
}
.node .cardInner{
  width: 170px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--node-r-bg);
  box-shadow: 0 10px 22px var(--shadow);
  padding: 10px 12px;
}

.node[data-kind="result"] .cardInner{
  border-radius: 12px;
  padding: 12px 12px;
}

.node[data-kind="decision"] .cardInner{
  /* losange via wrapper */
  width: 170px;
  height: 140px;
  padding: 0;
  border-radius: 14px;
  background: var(--node-q-bg);
  display: grid;
  place-items: center;
  transform: rotate(45deg);
}

.node[data-kind="decision"] .cardInner .content{
  transform: rotate(-45deg);
  width: calc(100% - 18px);
  padding: 10px 10px;
  text-align: center;
}

.node .title{
  font-weight: 800;
  font-size: 13px;
  margin-bottom: 6px;
  opacity: .9;
}
.node .text{
  font-size: 13px;
  color: var(--text);
  opacity: .95;
}

.node .badge{
  display: inline-block;
  margin-bottom: 6px;
  padding: 4px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
  color: var(--text);
  font-weight: 700;
  font-size: 12px;
}

.node.is-start .badge{
  background: color-mix(in srgb, var(--ok) 16%, transparent);
  border-color: color-mix(in srgb, var(--ok) 35%, var(--border));
}

kbd.key{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
}