/* ══════════════ USER MANUAL PANEL (roadmap: Help button, unfolds from the left) ══════════════ */
.manual-overlay {
  position: fixed;
  top: 57px;
  left: -560px;
  bottom: 0;
  width: 540px;
  max-width: 92vw;
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 120;
  transition: left .2s;
  display: flex;
  flex-direction: column;
  box-shadow: 8px 0 24px rgba(0,0,0,.35);
}
.manual-overlay.open {
  left: 0;
}
.manual-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.manual-head .modal-title {
  white-space: nowrap;
}
.manual-head input[type="search"] {
  flex: 1;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  color: var(--text);
  font-size: 13px;
}
.manual-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}
.manual-toc {
  width: 190px;
  flex: 0 0 190px;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: 8px;
}
.manual-toc-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
}
.manual-toc-btn:hover {
  background: var(--hover);
  color: var(--text);
}
.manual-toc-btn.active {
  background: var(--hover);
  color: var(--blue);
  font-weight: 700;
}
.manual-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  line-height: 1.6;
  color: var(--text);
  font-size: 13px;
}
.manual-content h3 {
  margin-top: 0;
  color: var(--blue);
}
.manual-content p {
  margin: 0 0 12px;
}
.manual-content code {
  background: var(--surface2);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 12px;
}

@media (max-width: 820px) {
  .manual-overlay {
    width: 100vw;
    max-width: 100vw;
    left: -100vw;
    top: 0;
  }
  .manual-body {
    flex-direction: column;
  }
  .manual-toc {
    width: 100%;
    flex: 0 0 auto;
    max-height: 140px;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}