:root {
  color-scheme: light;
  --bg: #f5f3ee;
  --panel: rgba(255, 255, 255, 0.92);
  --ink: #20251f;
  --muted: #667064;
  --line: #a9b3a6;
  --accent: #315c4a;
  --accent-soft: #dfe9e3;
  --flow: #456d5b;
  --warn: #9b6b2f;
  --shadow: 0 10px 28px rgba(32, 37, 31, 0.12);
}
* { box-sizing: border-box; }
html, body { margin: 0; width: 100%; height: 100%; overflow: hidden; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 0%, rgba(49, 92, 74, 0.10), transparent 28rem),
    var(--bg);
}
button, a { font: inherit; }
.app { display: grid; grid-template-rows: auto 1fr; width: 100%; height: 100%; }
.toolbar {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--panel);
  border-bottom: 1px solid rgba(49, 92, 74, 0.16);
  backdrop-filter: blur(14px);
}
.identity { min-width: 0; margin-right: auto; }
.title { margin: 0; font-size: 16px; font-weight: 700; }
.subtitle { margin: 2px 0 0; color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.badge { display: inline-flex; padding: 4px 8px; border-radius: 999px; color: var(--accent); background: var(--accent-soft); font-size: 11px; white-space: nowrap; }
.controls { display: flex; align-items: center; gap: 6px; }
.btn {
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid rgba(49, 92, 74, 0.20);
  border-radius: 9px;
  color: var(--ink);
  background: #fff;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { background: var(--accent-soft); }
.viewport { position: relative; overflow: hidden; cursor: grab; touch-action: none; }
.viewport.is-dragging { cursor: grabbing; }
.world { position: absolute; inset: 0 auto auto 0; transform-origin: 0 0; }
.edges { position: absolute; inset: 0; overflow: visible; pointer-events: none; }
.edge { fill: none; stroke: var(--line); stroke-width: 2; }
.edge.flow { stroke: var(--flow); stroke-width: 3; }
.edge.excluded { stroke: var(--warn); stroke-dasharray: 8 6; }
.node {
  position: absolute;
  width: 236px;
  min-height: 68px;
  padding: 10px 12px;
  border: 1px solid rgba(49, 92, 74, 0.18);
  border-radius: 12px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
  text-align: left;
  cursor: pointer;
}
.node:hover, .node:focus-visible { border-color: var(--accent); outline: 3px solid rgba(49, 92, 74, 0.18); }
.node.root { background: var(--accent); color: #fff; }
.node.parallel { background: #edf4f0; }
.node.excluded { border-color: #bd8b4f; background: #fff7e9; }
.node.owner, .node.goal { background: #e8eee2; }
.node-label { display: block; font-weight: 700; font-size: 14px; line-height: 1.35; }
.node-note { display: block; margin-top: 5px; color: var(--muted); font-size: 11px; line-height: 1.35; }
.node.root .node-note { color: rgba(255,255,255,.78); }
.node-toggle { float: right; margin-left: 7px; color: inherit; opacity: .65; }
.node-link { display: inline-block; margin-top: 7px; color: var(--accent); font-size: 11px; font-weight: 700; }
.node.root .node-link { color: #fff; }
.hint {
  position: absolute;
  left: 12px;
  bottom: 10px;
  z-index: 4;
  max-width: calc(100% - 24px);
  padding: 6px 9px;
  border-radius: 8px;
  color: var(--muted);
  background: rgba(255,255,255,.88);
  font-size: 11px;
  pointer-events: none;
}
@media (max-width: 760px) {
  .toolbar { flex-wrap: wrap; gap: 8px; }
  .identity { width: calc(100% - 116px); }
  .controls { width: 100%; overflow-x: auto; }
  .btn { white-space: nowrap; }
  .badge { margin-left: auto; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}