/* Layout */
body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
}
#app {
  display: flex;
  flex: 1;
  overflow: hidden;
}
#control-panel, #log-panel {
  width: 250px;
  padding: 10px;
  box-sizing: border-box;
  background: #f4f4f4;
  border-right: 1px solid #ccc;
  display: flex;
  flex-direction: column;
}
#log-panel, #scenario-panel {
  border-left: 1px solid #ccc;
  border-right: none;
}
#canvas-container {
  flex: 1;
  position: relative;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
}
canvas {
  background: #eef;
  border: 1px solid #333;
}

/* Controls */
#control-panel h2, #log-panel h2 {
  margin-top: 0;
  font-size: 1.2em;
  text-align: center;
}
.control-group {
  margin: 10px 0;
  display: flex;
  flex-direction: column;
}
.control-group label {
  font-size: 0.9em;
  margin-bottom: 4px;
}
.control-group input[type=range], .control-group select {
  width: 100%;
}
.control-group span {
  font-size: 0.9em;
  text-align: right;
  display: block;
}
button {
  padding: 8px;
  margin: 5px 0;
  cursor: pointer;
  border: 1px solid #666;
  background: #ddd;
  font-size: 1em;
}
button:hover {
  background: #ccc;
}

/* Log & State */
#state-panel {
  flex: 0 0 auto;
  margin-bottom: 10px;
}
.node-state {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px solid #eee;
  font-size: 0.9em;
}
#log-output, #scenario-goal, #scenario-allowed, #scenario-task {
  flex: 1;
  overflow-y: auto;
  background: #fff;
  border: 1px solid #ccc;
  padding: 5px;
  font-family: monospace;
  font-size: 0.85em;
  line-height: 1.2em;
}