.trail-board {
  position: relative;
  background: var(--glass);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: 0 0 64px 3px color-mix(in srgb, var(--accent) 11%, transparent);
  aspect-ratio: 1;
  margin-bottom: 16px;
  overflow: hidden;
}

.trail-node {
  position: absolute;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent-dim);
  color: var(--text);
  font-weight: 700;
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.trail-node:hover {
  border-color: var(--accent);
  transform: scale(1.05);
}

.trail-node.done {
  background: color-mix(in srgb, var(--accent) 45%, transparent);
  border-color: var(--accent);
  color: var(--accent);
  opacity: 0.7;
  pointer-events: none;
}

.trail-node.next {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 45%, transparent);
}

.trail-node.bad {
  background: rgba(228, 74, 74, 0.4);
  border-color: var(--bad);
}