:root {
  --tool-text: #1f2430;
  --tool-text-muted: #6b7280;
  --tool-board-bg: linear-gradient(180deg, #f6e5cf 0%, #eed7b9 100%);
  --tool-board-border: #d8b789;
  --tool-key-bg: linear-gradient(180deg, #fffdfa 0%, #f8f1e7 100%);
  --tool-key-border: #20242b;
  --tool-key-shadow: 0 4px 0 rgba(32, 36, 43, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  --tool-key-active: linear-gradient(180deg, #ffd764 0%, #ffba18 100%);
  --tool-key-active-text: #fff;
  --tool-key-demo: linear-gradient(180deg, #ffb847 0%, #ff8f12 100%);
  --tool-console-bg: #fffdf8;
  --tool-console-border: #ead7bf;
  --tool-shadow: 0 20px 46px rgba(139, 94, 38, 0.12);
}

.keyboard-workspace .panel-intro .tags span {
  background: linear-gradient(135deg, #f29d1f 0%, #e98207 100%);
}

.keyboard-workspace .tool-billing .bill-mode {
  color: #8a4a00;
  background: #fff1dd;
  border-color: #efc993;
}

.keyboard-workspace .tool-billing .bill-credit {
  color: #8a4a00;
  background: #fff7e8;
  border-color: #efdbaf;
}

.intro-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.intro-highlights span {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: #fff7e8;
  border: 1px solid #efd5aa;
  color: #8a5608;
  font-size: 13px;
  font-weight: 700;
}

.keyboard-lab {
  display: grid;
  gap: 18px;
}

.keyboard-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  border-radius: 24px;
  background: linear-gradient(180deg, #fffdf9 0%, #fff8ef 100%);
  border: 1px solid #f0dfc4;
}

.keyboard-focus-copy {
  display: grid;
  gap: 6px;
}

.keyboard-focus-copy strong {
  color: var(--tool-text);
  font-size: 16px;
}

.keyboard-focus-copy p {
  margin: 0;
  color: var(--tool-text-muted);
  font-size: 13px;
  line-height: 1.7;
}

.keyboard-toolbar-side {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

.toolbar-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.toggle-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid #ead7bf;
  background: #fff;
  color: #6f5532;
  font-size: 13px;
  font-weight: 700;
}

.toggle-chip input {
  width: 16px;
  height: 16px;
  margin: 0;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.action-row button {
  border: 1px solid #1f2430;
  border-radius: 12px;
  padding: 10px 16px;
  background: #fff;
  color: #1f2430;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 3px 0 rgba(31, 36, 48, 0.15);
  transition: transform 0.14s ease, box-shadow 0.14s ease, background 0.14s ease;
}

.action-row button:hover {
  transform: translateY(-1px);
  box-shadow: 0 5px 0 rgba(31, 36, 48, 0.18);
}

.action-row .primary {
  background: linear-gradient(180deg, #ffd764 0%, #ffbf20 100%);
}

.keyboard-stage {
  padding: 22px;
  border-radius: 30px;
  border: 1px solid var(--tool-board-border);
  background: var(--tool-board-bg);
  box-shadow: var(--tool-shadow);
  outline: none;
}

.keyboard-stage:focus {
  box-shadow: var(--tool-shadow), 0 0 0 4px rgba(245, 168, 51, 0.22);
}

.keyboard-frame {
  display: grid;
  gap: 18px;
}

.tool-tip {
  min-height: 22px;
  color: #7a5517;
  font-size: 13px;
  line-height: 1.7;
}

.tool-tip.error {
  color: #b42318;
}

.keyboard-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 168px 228px;
  grid-template-areas:
    "main system numpad"
    "main nav numpad"
    "main arrows numpad";
  gap: 14px;
  align-items: start;
  min-width: 980px;
}

.keyboard-render {
  display: contents;
}

.keyboard-zone {
  display: grid;
  gap: 8px;
}

.keyboard-zone--main {
  grid-area: main;
}

.keyboard-zone--system {
  grid-area: system;
}

.keyboard-zone--nav {
  grid-area: nav;
}

.keyboard-zone--arrows {
  grid-area: arrows;
  align-self: end;
}

.keyboard-zone--numpad {
  grid-area: numpad;
}

.keyboard-row {
  display: grid;
  gap: 6px;
}

.keyboard-zone--main .keyboard-row {
  grid-template-columns: repeat(60, minmax(0, 1fr));
}

.keyboard-zone--system .keyboard-row,
.keyboard-zone--nav .keyboard-row,
.keyboard-zone--arrows .keyboard-row {
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.keyboard-zone--numpad .keyboard-row {
  grid-template-columns: repeat(16, minmax(0, 1fr));
}

.kb-key {
  grid-column: span 4;
  min-height: 40px;
  padding: 6px 8px 8px;
  border-radius: 8px;
  border: 1px solid var(--tool-key-border);
  background: var(--tool-key-bg);
  box-shadow: var(--tool-key-shadow);
  display: grid;
  align-content: space-between;
  gap: 3px;
  overflow: hidden;
  user-select: none;
  transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.1s ease;
}

.kb-key strong {
  display: block;
  color: var(--tool-text);
  font-size: 11px;
  line-height: 1.15;
  font-weight: 800;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.kb-key span {
  display: block;
  color: #7b8087;
  font-size: 10px;
  line-height: 1.1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.keyboard-zone--main .kb-key {
  min-height: 48px;
  padding-top: 8px;
}

.keyboard-zone--main .kb-key strong {
  font-size: 12px;
}

.keyboard-zone--main .kb-key span {
  font-size: 10px;
}

.keyboard-zone--system .kb-key,
.keyboard-zone--nav .kb-key,
.keyboard-zone--arrows .kb-key,
.keyboard-zone--numpad .kb-key {
  min-height: 46px;
  padding-inline: 6px;
}

.keyboard-zone--system .kb-key strong,
.keyboard-zone--nav .kb-key strong,
.keyboard-zone--arrows .kb-key strong,
.keyboard-zone--numpad .kb-key strong {
  font-size: 10px;
}

.keyboard-zone--system .kb-key span,
.keyboard-zone--nav .kb-key span,
.keyboard-zone--arrows .kb-key span,
.keyboard-zone--numpad .kb-key span {
  font-size: 9px;
}

.keyboard-zone--system .kb-key,
.keyboard-zone--nav .kb-key,
.keyboard-zone--arrows .kb-key {
  align-content: center;
  justify-items: center;
  gap: 0;
  padding-block: 10px;
}

.keyboard-zone--system .kb-key span,
.keyboard-zone--nav .kb-key span,
.keyboard-zone--arrows .kb-key span {
  display: none;
}

.keyboard-zone--system .kb-key strong,
.keyboard-zone--nav .kb-key strong {
  font-size: 11px;
  line-height: 1;
}

.keyboard-zone--arrows .kb-key strong {
  font-size: 16px;
  line-height: 1;
}

.keyboard-zone--arrows .keyboard-row:first-child .kb-key {
  grid-column: 5 / span 4;
}

.keyboard-zone--numpad .kb-key {
  position: relative;
  min-height: 52px;
  padding: 18px 6px 8px;
  align-content: end;
}

.keyboard-zone--numpad .kb-key strong {
  font-size: 13px;
  line-height: 1;
}

.keyboard-zone--numpad .kb-key span {
  position: absolute;
  top: 6px;
  right: 6px;
  max-width: calc(100% - 12px);
  font-size: 8px;
  line-height: 1;
}

.kb-key.is-active {
  transform: translateY(2px);
  background: var(--tool-key-active);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

.kb-key.is-active strong,
.kb-key.is-active span,
.kb-key.is-demo strong,
.kb-key.is-demo span {
  color: var(--tool-key-active-text);
}

.kb-key.is-demo {
  transform: translateY(1px);
  background: var(--tool-key-demo);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.keyboard-console {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 14px;
}

.console-card {
  padding: 18px;
  border-radius: 22px;
  background: var(--tool-console-bg);
  border: 1px solid var(--tool-console-border);
}

.console-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.console-head strong {
  color: var(--tool-text);
  font-size: 14px;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  background: #fff4da;
  border: 1px solid #f0d39d;
  color: #8a5608;
  font-size: 12px;
  font-weight: 800;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.stat-card {
  padding: 12px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid #ead7bf;
  display: grid;
  gap: 7px;
}

.stat-card span {
  color: var(--tool-text-muted);
  font-size: 11px;
}

.stat-card strong {
  color: var(--tool-text);
  font-size: 15px;
}

.combo-card {
  margin-top: 12px;
  padding: 14px 16px;
  border-radius: 18px;
  background: #fff8ee;
  border: 1px dashed #e0c89f;
}

.combo-card span {
  display: block;
  margin-bottom: 8px;
  color: #8a5608;
  font-size: 12px;
}

.combo-value {
  color: var(--tool-text);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.6;
  word-break: break-word;
}

.summary-output {
  width: 100%;
  min-height: 110px;
  margin-top: 12px;
  box-sizing: border-box;
  border: 1px solid #ead7bf;
  border-radius: 16px;
  background: #fff;
  color: var(--tool-text);
  font-size: 13px;
  line-height: 1.7;
  padding: 12px 14px;
  resize: vertical;
}

.summary-output:focus {
  outline: none;
  border-color: #dfb66b;
  box-shadow: 0 0 0 4px rgba(240, 183, 88, 0.14);
}

.log-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.log-item {
  display: grid;
  gap: 5px;
  padding: 12px 14px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid #ead7bf;
}

.log-item strong {
  color: var(--tool-text);
  font-size: 12px;
}

.log-item span {
  color: var(--tool-text-muted);
  font-size: 11px;
  line-height: 1.6;
}

.empty-log {
  padding: 14px;
  border-radius: 16px;
  background: #fffaf3;
  border: 1px dashed #e3cda7;
  color: var(--tool-text-muted);
  line-height: 1.8;
  font-size: 12px;
}

.keyboard-guide {
  padding: 18px 20px;
  border-radius: 22px;
  background: linear-gradient(180deg, #fffdf9 0%, #fff7ec 100%);
  border: 1px solid #f0dfc4;
}

.keyboard-guide ul {
  margin: 0;
  padding-left: 18px;
  color: var(--tool-text-muted);
}

.keyboard-guide li {
  margin: 0 0 10px;
  line-height: 1.8;
}

@media (max-width: 1180px) {
  .keyboard-board {
    grid-template-columns: 1fr;
    grid-template-areas:
      "main"
      "system"
      "nav"
      "arrows"
      "numpad";
  }

  .keyboard-console {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .keyboard-topbar {
    padding: 16px;
  }

  .keyboard-stage {
    padding: 14px;
    overflow-x: auto;
  }

  .keyboard-frame {
    min-width: 980px;
  }
}

@media (max-width: 640px) {
  .toolbar-stack,
  .keyboard-toolbar-side,
  .action-row {
    width: 100%;
  }

  .action-row button,
  .toggle-chip {
    width: 100%;
    justify-content: center;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}