* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

body {
  background: linear-gradient( #003858, #00385A);
  min-height: 100vh;
  overflow: hidden;
}

canvas {
  display: block;
}

.hidden {
  display: none !important;
}

.control-panel {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255,255,255,0.9);  /* slightly translucent white, tweak as you like */
  border: 2px solid #000;             /* black border */
  padding: 1rem 1.5rem;               /* space inside */
  border-radius: 8px;                 /* rounded corners, optional */
  display: flex;
  flex-direction: column;
  gap: 0.5rem;                        /* space between rows */
  box-shadow: 0 2px 8px rgba(0,0,0,0.3); /* subtle drop shadow */
  z-index: 10;                        /* on top of canvas */
}

.control-panel .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.control-panel .title {
  font-size: 1.4rem;
  font-weight: bold;
  margin-right: 1rem;
}

.control-panel .value {
  font-size: 1rem;
  color: #333;
}