/* Keyboard Lab: shared by all tools and languages; isolated from other utilities. */
.keyboard-lab {
  --kb-ink: #252c2a;
  --kb-muted: #646e69;
  --kb-border: #dce0da;
  --kb-paper: #fff;
  --kb-wash: #f3f4ef;
  --kb-accent: #3d6657;
  background: #f7f8f4;
  color: var(--kb-ink);
}
.keyboard-lab .utility-main { background: #f7f8f4; padding: 48px 0 72px; }
.keyboard-lab .utility-shell-inner { width: min(100% - 80px, 1480px); }
.keyboard-lab .utility-layout { grid-template-columns: minmax(0, 1fr) 276px; gap: 40px; }
.keyboard-lab .utility-layout.is-nav-collapsed { grid-template-columns: minmax(0, 1fr) 48px; }
.keyboard-lab .site-header, .keyboard-lab .site-main-nav { background: #fdfdfa; border-color: var(--kb-border); }
.keyboard-lab .brand-sub { font-size: 14px; font-weight: 500; color: var(--kb-muted); }
.keyboard-lab .header-search :is(input, button) { border-color: var(--kb-border); border-radius: 6px; background: transparent; }
.keyboard-lab .site-main-nav-inner { padding-top: 8px; padding-bottom: 8px; }
.keyboard-lab :is(.site-main-nav-link, .site-main-nav-lang-link) { background: transparent; border-color: transparent; border-radius: 5px; box-shadow: none; color: #5a645e; font-weight: 500; }
.keyboard-lab .site-main-nav a[aria-current] { background: #e8eee8; border-color: #e8eee8; color: #264a3a; }
.keyboard-lab .site-main-nav a:hover { background: #edf0ea; color: #253f32; }
.keyboard-lab .site-main-nav-lang { gap: 4px; }
.keyboard-lab .site-footer { background: #fdfdfa; border-top: 1px solid var(--kb-border); }

/* A quieter companion menu leaves the test as the visual focus. */
.keyboard-lab .utility-navigator { top: 28px; }
.keyboard-lab .utility-nav-inner { gap: 24px; }
.keyboard-lab .utility-nav-card { padding: 18px 0; border: 0; border-bottom: 1px solid var(--kb-border); border-radius: 0; box-shadow: none; background: transparent; }
.keyboard-lab .utility-nav-card:first-child { padding-top: 0; }
.keyboard-lab .utility-nav-card-head :is(strong, label) { font-size: 12px; font-weight: 650; color: var(--kb-ink); }
.keyboard-lab .utility-nav-card-head span { font-size: 10px; font-weight: 500; letter-spacing: .08em; color: var(--kb-muted); }
.keyboard-lab .utility-nav-search-input { border-color: var(--kb-border); border-radius: 7px; background: #fff; }
.keyboard-lab .utility-nav-list { gap: 3px; }
.keyboard-lab .utility-nav-link { min-height: 40px; padding: 10px 12px; border-radius: 6px; background: transparent; color: #58625c; font-size: 12px; font-weight: 500; }
.keyboard-lab .utility-nav-link i { color: #7b887e; font-size: 13px; }
.keyboard-lab .utility-nav-link:hover { background: #edf0e9; border-color: transparent; color: #2b4839; }
.keyboard-lab .utility-nav-link.is-active { background: #e6ede5; border-color: #e6ede5; color: #294b39; font-weight: 650; }
.keyboard-lab .utility-nav-link.is-active i, .keyboard-lab .utility-nav-link.is-active span em { color: #3d6657; }
.keyboard-lab .utility-nav-link span em { font-weight: 400; color: var(--kb-muted); }
.keyboard-lab .utility-nav-empty { background: #eff1eb; color: var(--kb-muted); border-radius: 6px; }
.keyboard-lab .utility-nav-toggle { border-color: var(--kb-border); color: var(--kb-muted); box-shadow: none; }
.keyboard-lab .utility-navigator :is(a, button, input):focus-visible { outline-color: var(--kb-accent); }

.kb-page { max-width: 1120px; margin: 0 auto; padding: 0; color: var(--kb-ink); }
.kb-header { margin-bottom: 32px; padding: 0 0 28px; border-bottom: 1px solid var(--kb-border); }
.kb-eyebrow { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin: 0 0 24px; color: var(--kb-accent); font-size: .67rem; font-weight: 700; letter-spacing: .16em; }
.kb-brand-icon { width: 25px; height: 25px; flex: 0 0 auto; }
.kb-category { padding-left: 12px; border-left: 1px solid #cdd5cc; color: var(--kb-muted); letter-spacing: .02em; font-weight: 500; }
.kb-header h1 { font-size: clamp(1.85rem, 3.1vw, 2.6rem); font-weight: 700; letter-spacing: -.045em; line-height: 1.3; margin: 0 0 14px; text-wrap: balance; }
.kb-header > p:last-child { max-width: 680px; margin: 0; color: var(--kb-muted); font-size: .96rem; line-height: 1.85; word-break: keep-all; overflow-wrap: anywhere; }
.kb-panel { padding: clamp(20px, 2.5vw, 32px); border: 1px solid var(--kb-border); border-radius: 16px; background: var(--kb-paper); box-shadow: 0 4px 8px #27332a02, 0 20px 48px -32px #27332a22; }
.kb-panel-label { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; color: var(--kb-muted); font-size: .71rem; font-weight: 600; letter-spacing: .06em; }
.kb-indicator { width: 6px; height: 6px; border-radius: 50%; background: #718476; }
.kb-instruction { max-width: 760px; font-size: .95rem; font-weight: 500; line-height: 1.85; margin: 0 0 24px; word-break: keep-all; overflow-wrap: anywhere; }
.kb-controls, .kb-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; margin: 20px 0; }
.kb-controls:empty, .kb-controls:not(:has(*)) { display: none; }
.kb-field { display: flex; flex-direction: column; gap: 9px; min-width: 0; max-width: 100%; flex: 1; color: #556059; font-size: .79rem; font-weight: 550; }
.kb-controls .kb-field { flex: 0 1 210px; }
.kb-field select, .kb-field textarea, .kb-bind-row select { width: 100%; min-width: 0; border: 1px solid #cdd5cc; border-radius: 7px; padding: 11px 12px; background: #fafbf8; color: var(--kb-ink); font: inherit; }
.kb-field select { min-height: 44px; }
.kb-field textarea { resize: vertical; font-weight: 400; line-height: 1.9; margin-bottom: 12px; padding: 16px; font-size: .95rem; }
.kb-field textarea:read-only { background: #f5f6f2; }
.kb-field textarea::placeholder { color: #6f796f; }
.kb-button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; border: 1px solid #d7ddd4; border-radius: 7px; padding: 10px 15px; background: #fff; color: var(--kb-ink); font: inherit; font-size: .82rem; font-weight: 550; line-height: 1.5; cursor: pointer; transition: background .16s, border-color .16s, box-shadow .16s; }
.kb-button svg { width: 16px; height: 16px; flex: 0 0 auto; }
.kb-primary { background: #293e33; border-color: #293e33; color: #fff; padding-inline: 22px; }
.kb-button:disabled { color: #8b948d; background: #f6f7f4; border-color: #e4e8e0; cursor: default; }
.kb-button:not(:disabled):hover { background: #f0f3ec; border-color: #a7b5a5; }
.kb-primary:not(:disabled):hover { background: #3c5544; border-color: #3c5544; box-shadow: 0 3px 9px #29412e15; }
.kb-export { margin-left: auto; color: var(--kb-muted); }
.kb-page :focus-visible { outline: 3px solid var(--kb-accent); outline-offset: 3px; }
.kb-status { min-height: 1.7em; margin: 14px 0 24px; color: var(--kb-accent); font-size: .78rem; line-height: 1.7; }
.kb-metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(145px, 1fr)); gap: 1px; margin: 24px 0; overflow: hidden; background: var(--kb-border); border: 1px solid var(--kb-border); border-radius: 10px; }
.kb-metric { min-width: 0; padding: 20px 18px; background: #fafbf8; }
.kb-metric span { display: block; color: var(--kb-muted); font-size: .72rem; line-height: 1.6; margin-bottom: 10px; }
.kb-metric strong { display: block; font-size: clamp(1.4rem, 2.1vw, 2rem); font-weight: 600; font-variant-numeric: tabular-nums; letter-spacing: -.04em; overflow-wrap: anywhere; line-height: 1.25; }
.kb-metric small { display: inline-block; margin-left: 6px; font-size: .68rem; color: var(--kb-muted); font-weight: 400; letter-spacing: 0; }
.kb-arena { padding: 22px 16px 14px; background: #eeefe9; border: 1px solid #d5dacf; border-radius: 12px; box-shadow: inset 0 1px 3px #2a38280a; }
.kb-arena:focus { border-color: #6c8a75; }
.kb-live { min-height: 24px; margin: 0 0 18px; font-size: .8rem; line-height: 1.65; overflow-wrap: anywhere; font-weight: 500; color: #53624f; }
.kb-keyboard-scroll { overflow-x: auto; padding: 4px 2px 12px; scrollbar-width: thin; scrollbar-color: #b1bba9 #e9ede4; }
.kb-keyboard { display: flex; flex-direction: column; gap: 6px; min-width: 640px; user-select: none; }
.kb-key-row { display: flex; gap: 5px; }
.kb-key-row:first-child { margin-bottom: 6px; }
.kb-key { display: flex; align-items: center; justify-content: center; flex: var(--key-width, 1); min-width: 0; height: 40px; padding: 2px; border: 1px solid #cfd4c8; border-bottom: 3px solid #bcc4b6; border-radius: 5px; background: #fdfdfa; color: #55614f; font-size: .62rem; font-weight: 500; white-space: nowrap; box-shadow: 0 1px 2px #27352a09, inset 0 1px 0 #fff; }
.kb-key[data-code="Escape"], .kb-key[data-code="Enter"], .kb-key[data-code="Space"] { background: #dce3d6; border-color: #c0ccb6; border-bottom-color: #a7b69d; color: #334c2b; }
.kb-key.kb-seen { background: #e0ebf2; border-color: #b6cbd9; border-bottom-color: #9eb7c7; color: #36596d; }
.kb-key.kb-pressed { background: #3d6657; color: #fff; border-color: #2f5546; box-shadow: inset 0 2px 3px #16281a24; transform: translateY(1px); }
.kb-key.kb-expected { outline: 2px solid #9c752c; outline-offset: -4px; }
.kb-target { display: flex; align-items: center; justify-content: center; width: 88px; height: 88px; margin: 0 auto 24px; background: #344d3e; border: 1px solid #263d2e; border-bottom: 5px solid #223526; border-radius: 12px; color: #fff; font-size: 2.7rem; font-weight: 550; box-shadow: 0 4px 12px #263d2e12; }
.kb-muted { margin: 14px 0; color: var(--kb-muted); font-size: .75rem; line-height: 1.85; overflow-wrap: anywhere; }
.kb-muted:empty { display: none; }
.kb-privacy { display: flex; align-items: flex-start; gap: 10px; border-top: 1px solid #e7eae2; padding-top: 20px; margin: 24px 0 0; }
.kb-privacy svg { flex: 0 0 auto; width: 16px; height: 16px; margin-top: 3px; color: #6f816d; }
.kb-table-scroll { overflow-x: auto; margin-top: 28px; }
.kb-table { width: 100%; min-width: 430px; border-collapse: collapse; font-size: .78rem; font-variant-numeric: tabular-nums; }
.kb-table caption { caption-side: top; padding: 0 0 14px; color: var(--kb-ink); text-align: left; font-size: .83rem; font-weight: 600; }
.kb-table th, .kb-table td { padding: 12px 10px; border-bottom: 1px solid #e7eae3; text-align: left; overflow-wrap: anywhere; }
.kb-table th { background: #f6f7f2; color: var(--kb-muted); font-size: .71rem; font-weight: 500; }
.kb-table td[colspan] { padding-block: 22px; text-align: center; color: var(--kb-muted); }
.kb-log { margin-top: 16px; font-size: .78rem; color: var(--kb-muted); }
.kb-log summary { cursor: pointer; padding: 10px 0; }
.kb-log ol { max-height: 210px; overflow: auto; padding-left: 30px; font-family: monospace; line-height: 1.8; }
.kb-notice { padding: 20px 22px; border: 1px solid #e2dfd1; border-left: 3px solid #a4905b; border-radius: 0 9px 9px 0; background: #f5f3eb; color: #655d43; font-size: .83rem; line-height: 1.85; margin: 24px 0; }
.kb-notice:empty { display: none; }
.kb-notice h3 { margin: 0 0 9px; font-size: .86rem; font-weight: 600; }
.kb-notice p { margin: 0; }
.kb-guide { padding: 44px 0 0; line-height: 1.85; }
.kb-guide h2 { font-size: 1.2rem; font-weight: 650; letter-spacing: -.025em; margin-bottom: 24px; }
.kb-guide h3 { font-size: .9rem; font-weight: 600; margin-bottom: 10px; }
.kb-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; list-style: none; counter-reset: kb-step; padding: 0; margin: 0 0 28px; }
.kb-steps li { counter-increment: kb-step; color: #5d685f; font-size: .83rem; line-height: 1.85; word-break: keep-all; overflow-wrap: anywhere; }
.kb-steps li::before { content: counter(kb-step, decimal-leading-zero); display: block; margin-bottom: 10px; color: #65755e; font-size: .72rem; font-weight: 600; letter-spacing: .07em; font-variant-numeric: tabular-nums; }
.kb-guide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin: 28px 0; padding-top: 28px; border-top: 1px solid var(--kb-border); }
.kb-guide-grid article { min-width: 0; }
.kb-guide-grid p { margin: 0; color: var(--kb-muted); font-size: .84rem; line-height: 1.9; }
.kb-guide a { color: var(--kb-accent); text-underline-offset: 3px; text-decoration-color: #b5c5b4; }
.kb-guide a:hover { text-decoration-color: var(--kb-accent); }
.kb-sentence { padding: 24px; margin-bottom: 22px; border: 1px solid var(--kb-border); border-radius: 10px; background: #f7f8f3; font-size: clamp(1.15rem, 1.8vw, 1.45rem); line-height: 2; letter-spacing: .01em; word-break: keep-all; overflow-wrap: anywhere; }
.kb-sentence:lang(ja), .kb-sentence:lang(zh) { word-break: normal; line-break: strict; }
.kb-char-correct { color: #2b5941; background: #e3eedf; }
.kb-char-wrong { color: #a13737; background: #fbe5df; text-decoration: underline; }
.kb-char-current { border-bottom: 2px solid var(--kb-accent); }
.kb-bind-rows { display: grid; gap: 10px; margin-bottom: 12px; }
.kb-bind-row { display: grid; grid-template-columns: 1fr 1.6fr auto; gap: 10px; align-items: end; }
.kb-bind-row .kb-field { font-size: .8rem; }
.kb-bind-row.kb-conflict select { border-color: #bb3838; }
.kb-results { margin: 18px 0; }
.kb-badge { color: #9b3920; font-weight: 650; }
.kb-results .kb-table td { max-width: 240px; }
.kb-cfg-message { white-space: pre-line; }

@media (max-width: 1199.98px) {
  .keyboard-lab .utility-shell-inner { width: min(100% - 64px, 960px); }
  .keyboard-lab .utility-layout, .keyboard-lab .utility-layout.is-nav-collapsed { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .keyboard-lab .utility-navigator { top: auto; }
  .keyboard-lab .utility-nav-toggle { border-radius: 7px; background: transparent; box-shadow: none; }
  .keyboard-lab .utility-nav-inner { padding: 18px; border: 1px solid var(--kb-border); border-radius: 10px; background: #fff; }
}
@media (max-width: 680px) {
  .keyboard-lab .utility-main { padding: 24px 0 44px; }
  .keyboard-lab .utility-shell-inner { width: calc(100% - 32px); }
  .keyboard-lab .utility-layout { gap: 26px; }
  .keyboard-lab .brand-sub { font-size: 12px; }
  .keyboard-lab .site-main-nav-links, .keyboard-lab .site-main-nav-lang { background: transparent; box-shadow: none; border: 0; padding: 0; }
  .keyboard-lab .site-main-nav-links { gap: 2px; }
  .keyboard-lab .site-main-nav-link { min-width: 0; padding-inline: 8px; font-size: 12px; }
  .kb-header { margin-bottom: 24px; padding-bottom: 24px; }
  .kb-eyebrow { margin-bottom: 18px; gap: 8px; font-size: .62rem; }
  .kb-category { padding-left: 9px; }
  .kb-header > p:last-child { font-size: .88rem; }
  .kb-panel { padding: 20px 16px; border-radius: 12px; }
  .kb-instruction { font-size: .87rem; }
  .kb-controls .kb-field { flex: 1 1 125px; }
  .kb-actions { gap: 8px; }
  .kb-actions .kb-button { flex: 1 1 auto; font-size: .78rem; padding: 10px 12px; }
  .kb-actions .kb-export { flex-basis: 100%; margin-left: 0; }
  .kb-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kb-metric { padding: 16px 12px; }
  .kb-metric:last-child:nth-child(odd) { grid-column: 1 / -1; }
  .kb-metric span { font-size: .7rem; margin-bottom: 7px; }
  .kb-arena { padding: 16px 10px 10px; }
  .kb-guide { padding-top: 32px; }
  .kb-steps { grid-template-columns: 1fr; gap: 16px; }
  .kb-steps li { display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 8px; }
  .kb-steps li::before { margin: 2px 0 0; }
  .kb-guide-grid { grid-template-columns: 1fr; gap: 24px; }
  .kb-notice { padding: 16px; }
  .kb-sentence { padding: 18px; }
  .kb-bind-row { grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr) auto; gap: 5px; }
  .kb-bind-row .kb-button { padding: 8px; font-size: .8rem; }
  .kb-bind-row select { padding: 10px 5px; }
}
@media (prefers-reduced-motion: reduce) {
  .kb-button { transition: none; }
}