.canvas-help {
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 3;
  width: min(520px, calc(100vw - 36px));
  max-height: min(70dvh, 620px);
  overflow: auto;
  padding: 16px;
  border: 1px solid var(--line-b);
  background: var(--bg);
  color: var(--text);
  transform: translate(-50%, -50%);
  user-select: text;
  -webkit-user-select: text;
}

.canvas-help[hidden] {
  display: none;
}

.canvas-help-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hair);
}

.canvas-help h2,
.canvas-help h3,
.canvas-help dl,
.canvas-help dd {
  margin: 0;
}

.canvas-help h2 {
  color: var(--line-c);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .16em;
}

.canvas-help h3 {
  margin-bottom: 7px;
  color: var(--line-c);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .12em;
}

.canvas-help-close {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--hair);
  background: transparent;
  color: var(--line-c);
  cursor: pointer;
}

.canvas-help-close:hover,
.canvas-help-close:focus-visible {
  border-color: var(--line-b);
}

.canvas-help-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 26px;
  padding-top: 14px;
}

.canvas-help-body section:last-child {
  grid-column: 1 / -1;
}

.canvas-help dl {
  display: grid;
  gap: 5px;
}

.canvas-help dl > div {
  display: grid;
  grid-template-columns: minmax(150px, .9fr) minmax(0, 1.1fr);
  gap: 12px;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--hair);
}

.canvas-help dt {
  color: var(--line-c);
  font-size: 11px;
}

.canvas-help dd {
  font-size: 11px;
}

@media (max-width: 760px) {
  .canvas-help {
    width: calc(100vw - 36px);
    max-height: calc(100dvh - 36px);
  }

  .canvas-help-body {
    grid-template-columns: 1fr;
  }

  .canvas-help-body section:last-child {
    grid-column: auto;
  }

  .canvas-help dl > div {
    grid-template-columns: 1fr;
    gap: 1px;
  }
}