#tool-body {
  --sd-ink: #1e293b;
  --sd-muted: #64748b;
  --sd-line: #cbd5e1;
  --sd-soft: #f1f5f9;
  --sd-panel: #ffffff;
  --sd-board: #fafbfc;
  --sd-board-border: #1e293b;
  --sd-accent: #0f766e;
  --sd-accent-soft: rgba(15, 118, 110, 0.12);
  --sd-accent-hover: #0d9488;
  --sd-warn: #c2410c;
  --sd-danger: #dc2626;
  --sd-ok: #15803d;
  --sd-given: #0f172a;
  --sd-user: #1d4ed8;
  --sd-hint: #7c3aed;
  --sd-error-bg: rgba(220, 38, 38, 0.12);
  --sd-same: rgba(15, 118, 110, 0.1);
  --sd-select: rgba(15, 118, 110, 0.22);
  --sd-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --sd-radius: 16px;
  --sd-font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--sd-ink);
  font-family: var(--sd-font);
  line-height: 1.5;
  max-width: 1100px;
  margin: 0 auto;
  padding: 8px 4px 28px;
  box-sizing: border-box;
}

.theme-dark-mode #tool-body {
  --sd-ink: #e2e8f0;
  --sd-muted: #94a3b8;
  --sd-line: #334155;
  --sd-soft: #1e293b;
  --sd-panel: #0f172a;
  --sd-board: #111827;
  --sd-board-border: #8b99ae;
  --sd-accent: #2dd4bf;
  --sd-accent-soft: rgba(45, 212, 191, 0.14);
  --sd-accent-hover: #5eead4;
  --sd-warn: #fb923c;
  --sd-danger: #f87171;
  --sd-ok: #4ade80;
  --sd-given: #f8fafc;
  --sd-user: #93c5fd;
  --sd-hint: #c4b5fd;
  --sd-error-bg: rgba(248, 113, 113, 0.16);
  --sd-same: rgba(45, 212, 191, 0.12);
  --sd-select: rgba(45, 212, 191, 0.24);
  --sd-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

#tool-body *,
#tool-body *::before,
#tool-body *::after {
  box-sizing: border-box;
}

#tool-body .sd-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 20px;
  align-items: start;
}

#tool-body .sd-panel {
  background: var(--sd-panel);
  border: 1px solid var(--sd-line);
  border-radius: var(--sd-radius);
  box-shadow: var(--sd-shadow);
}

#tool-body .sd-main {
  padding: 18px;
}

#tool-body .sd-topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

#tool-body .sd-title-wrap {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

#tool-body .sd-title {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

#tool-body .sd-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--sd-accent-soft);
  color: var(--sd-accent);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

#tool-body .sd-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

#tool-body .sd-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 10px;
  background: var(--sd-soft);
  color: var(--sd-muted);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

#tool-body .sd-chip strong {
  color: var(--sd-ink);
  font-weight: 700;
}

#tool-body .sd-chip i {
  font-size: 13px;
}

#tool-body .sd-board-wrap {
  display: flex;
  justify-content: center;
  margin: 8px 0 16px;
}

#tool-body .sd-board {
  --cell: clamp(32px, 8.2vw, 52px);
  width: calc(var(--cell) * 9);
  display: grid;
  grid-template-columns: repeat(9, var(--cell));
  grid-template-rows: repeat(9, var(--cell));
  border: 2px solid var(--sd-board-border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--sd-board);
  user-select: none;
  touch-action: manipulation;
}

#tool-body .sd-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--cell);
  height: var(--cell);
  border-right: 1px solid var(--sd-line);
  border-bottom: 1px solid var(--sd-line);
  font-size: calc(var(--cell) * 0.42);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

#tool-body .sd-cell:nth-child(9n) {
  border-right: none;
}

#tool-body .sd-cell:nth-child(n+73) {
  border-bottom: none;
}

#tool-body .sd-cell[data-c="2"],
#tool-body .sd-cell[data-c="5"] {
  border-right: 2px solid var(--sd-board-border);
}

#tool-body .sd-cell[data-r="2"],
#tool-body .sd-cell[data-r="5"] {
  border-bottom: 2px solid var(--sd-board-border);
}

#tool-body .sd-cell.is-given {
  color: var(--sd-given);
  font-weight: 700;
}

#tool-body .sd-cell.is-user {
  color: var(--sd-user);
}

#tool-body .sd-cell.is-hint {
  color: var(--sd-hint);
}

#tool-body .sd-cell.is-same {
  background: var(--sd-same);
}

#tool-body .sd-cell.is-related {
  background: rgba(148, 163, 184, 0.12);
}

#tool-body .sd-cell.is-selected {
  background: var(--sd-select);
  box-shadow: inset 0 0 0 2px var(--sd-accent);
  z-index: 1;
}

#tool-body .sd-cell.is-error {
  background: var(--sd-error-bg);
  color: var(--sd-danger);
}

#tool-body .sd-notes {
  position: absolute;
  inset: 2px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  font-size: calc(var(--cell) * 0.18);
  line-height: 1;
  color: var(--sd-muted);
  font-weight: 500;
  pointer-events: none;
}

#tool-body .sd-notes span {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
}

#tool-body .sd-notes span.on {
  opacity: 1;
}

#tool-body .sd-pad {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

#tool-body .sd-key,
#tool-body .sd-btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 12px;
  cursor: pointer;
  font: inherit;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

#tool-body .sd-key:active,
#tool-body .sd-btn:active {
  transform: translateY(1px);
}

#tool-body .sd-key {
  min-height: 44px;
  background: var(--sd-soft);
  color: var(--sd-ink);
  font-size: 18px;
  font-weight: 700;
}

#tool-body .sd-key:hover {
  border-color: var(--sd-accent);
  background: var(--sd-accent-soft);
}

#tool-body .sd-key.is-erase {
  font-size: 14px;
  font-weight: 600;
  color: var(--sd-muted);
}

#tool-body .sd-side {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: sticky;
  top: 12px;
}

#tool-body .sd-section-title {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--sd-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

#tool-body .sd-actions {
  display: grid;
  gap: 8px;
}

#tool-body .sd-btn {
  min-height: 42px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
}

#tool-body .sd-btn-primary {
  background: var(--sd-accent);
  color: #fff;
}

#tool-body .sd-btn-primary:hover {
  background: var(--sd-accent-hover);
}

#tool-body .sd-btn-ghost {
  background: transparent;
  border-color: var(--sd-line);
  color: var(--sd-ink);
}

#tool-body .sd-btn-ghost:hover {
  border-color: var(--sd-accent);
  background: var(--sd-accent-soft);
}

#tool-body .sd-btn-soft {
  background: var(--sd-soft);
  color: var(--sd-ink);
}

#tool-body .sd-btn-soft:hover {
  background: var(--sd-accent-soft);
  color: var(--sd-accent);
}

#tool-body .sd-btn.is-on {
  background: var(--sd-accent-soft);
  color: var(--sd-accent);
  border-color: var(--sd-accent);
}

#tool-body .sd-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

#tool-body .sd-hint-list {
  display: grid;
  gap: 8px;
}

#tool-body .sd-hint-btn {
  width: 100%;
  justify-content: space-between;
  background: var(--sd-soft);
  color: var(--sd-ink);
  border: 1px solid transparent;
}

#tool-body .sd-hint-btn:hover {
  border-color: var(--sd-accent);
}

#tool-body .sd-hint-btn .sd-price {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(194, 65, 12, 0.12);
  color: var(--sd-warn);
  font-size: 12px;
  font-weight: 700;
}

#tool-body .sd-mode-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 4px;
  border-radius: 12px;
  background: var(--sd-soft);
}

#tool-body .sd-mode-switch .sd-btn {
  min-height: 36px;
  border-radius: 10px;
  background: transparent;
  color: var(--sd-muted);
}

#tool-body .sd-mode-switch .sd-btn.is-on {
  background: var(--sd-panel);
  color: var(--sd-ink);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
}

#tool-body .sd-levels {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
  max-height: 220px;
  overflow: auto;
  padding-right: 2px;
}

#tool-body .sd-level {
  aspect-ratio: 1;
  border: 1px solid var(--sd-line);
  border-radius: 10px;
  background: var(--sd-panel);
  color: var(--sd-ink);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  cursor: pointer;
  padding: 0;
}

#tool-body .sd-level:hover:not(:disabled) {
  border-color: var(--sd-accent);
  background: var(--sd-accent-soft);
}

#tool-body .sd-level.is-current {
  border-color: var(--sd-accent);
  background: var(--sd-accent-soft);
  color: var(--sd-accent);
}

#tool-body .sd-level.is-locked {
  opacity: 0.4;
  cursor: not-allowed;
}

#tool-body .sd-level .sd-stars {
  font-size: 9px;
  letter-spacing: 0.5px;
  color: #f59e0b;
  min-height: 12px;
}

#tool-body .sd-practice {
  display: none;
  gap: 8px;
}

#tool-body .sd-practice.is-show {
  display: grid;
}

#tool-body .sd-diff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

#tool-body .sd-toast-host {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 10050;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  width: min(92vw, 360px);
}

#tool-body .sd-toast {
  background: rgba(15, 23, 42, 0.92);
  color: #fff;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 14px;
  text-align: center;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
  animation: sd-toast-in 0.22s ease;
}

#tool-body .sd-toast.is-ok {
  background: rgba(21, 128, 61, 0.95)!important;
}

#tool-body .sd-toast.is-err {
  background: rgba(185, 28, 28, 0.95)!important;
}

.theme-dark-mode #tool-body .sd-toast {
  background: rgba(30, 41, 59, 0.96);
}

@keyframes sd-toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

#tool-body .sd-modal-root {
  position: fixed;
  inset: 0;
  z-index: 10040;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

#tool-body .sd-modal-root.is-open {
  display: flex;
}

#tool-body .sd-modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.48);
  backdrop-filter: blur(4px);
}

#tool-body .sd-modal {
  position: relative;
  width: min(92vw, 440px);
  max-height: min(82vh, 82dvh);
  overflow: auto;
  background: var(--sd-panel);
  color: var(--sd-ink);
  border-radius: 18px;
  border: 1px solid var(--sd-line);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.28);
  padding: 22px 22px 18px;
  animation: sd-modal-in 0.22s ease;
}

@keyframes sd-modal-in {
  from { opacity: 0; transform: translateY(10px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

#tool-body .sd-modal h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

#tool-body .sd-modal p {
  margin: 0 0 10px;
  color: var(--sd-muted);
  font-size: 14px;
}

#tool-body .sd-modal ol,
#tool-body .sd-modal ul {
  margin: 0 0 12px;
  padding-left: 18px;
  color: var(--sd-ink);
  font-size: 14px;
}

#tool-body .sd-modal li + li {
  margin-top: 6px;
}

#tool-body .sd-modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 16px;
}

#tool-body .sd-win-stars {
  font-size: 28px;
  letter-spacing: 4px;
  color: #f59e0b;
  margin: 8px 0 4px;
}

#tool-body .sd-win-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 12px 0;
}

#tool-body .sd-win-stat {
  background: var(--sd-soft);
  border-radius: 12px;
  padding: 10px 12px;
  text-align: center;
}

#tool-body .sd-win-stat span {
  display: block;
  color: var(--sd-muted);
  font-size: 12px;
}

#tool-body .sd-win-stat strong {
  display: block;
  margin-top: 2px;
  font-size: 18px;
}

#tool-body .sd-help-link {
  margin-left: auto;
}

@media (max-width: 1200px) {
  #tool-body .sd-shell {
    grid-template-columns: 1fr;
  }

  #tool-body .sd-side {
    position: static;
  }

  #tool-body .sd-levels {
    /*     max-height: none; */
  }
}

@media (max-width: 480px) {
  #tool-body .sd-main,
  #tool-body .sd-side {
    padding: 14px;
  }

  #tool-body .sd-title {
    font-size: 18px;
  }

  #tool-body .sd-pad {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  #tool-body .sd-key {
    min-height: 40px;
    font-size: 16px;
  }
}
#tool-body .sd-level.is-locked .sd-stars {
  color: var(--sd-muted);
}
#tool-body #sdCheckBtn{
  color: var(--sd-accent-hover);
}
.theme-dark-mode #tool-body #sdCheckBtn{
  color: var(--sd-accent);
}