/* ── Keyboard Help Overlay ── */
.keyboard-help-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-toast);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.55);
  opacity: 0;
  transition: opacity 0.2s ease-out;
}
.keyboard-help-overlay.visible {
  opacity: 1;
}
.keyboard-help-panel {
  position: relative;
  max-width: 420px;
  width: calc(100vw - 3rem);
  padding: 1.4rem 1.6rem;
  background: rgba(var(--ink-rgb), 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  color: #fff;
}
.keyboard-help-close {
  position: absolute;
  top: 0.8rem;
  right: 0.8rem;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.4);
  padding: 4px;
  transition: color 0.2s;
}
.keyboard-help-close:hover {
  color: #fff;
}
.keyboard-help-close svg {
  width: 14px;
  height: 14px;
}
body.light-appearance .keyboard-help-close {
  color: rgba(var(--ink-rgb), 0.45);
}
.keyboard-help-title {
  font-family: "Syne", sans-serif;
  font-size: 1rem;
  margin: 0 0 1rem;
}
.keyboard-help-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1rem;
  margin: 0;
}
.keyboard-help-list dt {
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}
.keyboard-help-list dd {
  margin: 0;
  font-family: "DM Mono", monospace;
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.7);
  align-self: center;
}
.keyboard-help-list kbd {
  font-family: "DM Mono", monospace;
  font-size: 0.62rem;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 4px;
}
.keyboard-help-hint {
  margin: 1.2rem 0 0;
  font-family: "DM Mono", monospace;
  font-size: 0.6rem;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.04em;
}
body.light-appearance .keyboard-help-panel {
  background: rgba(240, 247, 255, 0.97);
  color: rgba(var(--ink-rgb), 0.9);
  border-color: rgba(0, 0, 0, 0.12);
}
body.light-appearance .keyboard-help-list kbd {
  background: rgba(0, 0, 0, 0.05);
  border-color: rgba(0, 0, 0, 0.18);
}