.ron-mindmap {
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 12px;
  background: #ffffff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", sans-serif;
}

.ron-mindmap__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
}

.ron-mindmap__toolbar {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-bottom: 8px;
}

.ron-mindmap__toolbar button {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  background: #f9fafb;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.08s ease, box-shadow 0.12s ease, background 0.12s ease;
}

.ron-mindmap__toolbar button:hover {
  background: #eef2ff;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.05);
}

.ron-mindmap__canvas {
  min-height: 480px;
  border: 1px dashed #d1d5db;
  border-radius: 10px;
  background: #fafafa;
  overflow: hidden;
}

.ron-mindmap__status {
  margin-top: 6px;
  font-size: 12px;
  color: #6b7280;
}


/* ---- Ron "Miro-like" navigation UI (bottom-right) ---- */
.ron-mindmap {
  position: relative;
}

.ron-mindmap__nav {
  position: absolute;
  right: 12px;
  bottom: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 20;
}

.ron-mindmap__navbtn {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid #e5e7eb;
  background: #ffffff;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}

.ron-mindmap__navbtn.is-active {
  background: #111827;
  color: #ffffff;
  border-color: #111827;
}

.ron-mindmap.is-panning .ron-mindmap__canvas {
  cursor: grabbing;
}

/* Touch gestures: let JS handle pinch/pan inside the canvas */
@media (pointer: coarse) {
  .ron-mindmap__canvas {
    touch-action: none;
    overscroll-behavior: contain;
  }
}

/* Mobile layout tweaks */
@media (max-width: 768px) {
  .ron-mindmap__toolbar {
    position: sticky;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(6px);
    padding: 8px 0;
    z-index: 15;
  }

  .ron-mindmap__btn {
    padding: 12px 10px;
    font-size: 14px;
  }

  .ron-mindmap__canvas {
    min-height: 70vh;
  }

  .ron-mindmap__navbtn {
    width: 48px;
    height: 48px;
    font-size: 18px;
  }
}