:root{--light: #ffffff;--dark: #0c0a09;--surface-light: #f5f5f4;--surface-dark: #292524;--accent-light: #0ea5e9;--accent-dark: #38bdf8;--accent-hover-light: #0284c7;--accent-hover-dark: #7dd3fc;--border-light: rgb(12 10 9 / .08);--border-dark: rgb(255 255 255 / .12);--stone-50: #fafaf9;--stone-100: #f5f5f4;--stone-200: #e7e5e4;--stone-300: #d6d3d1;--stone-400: #a8a29e;--stone-500: #78716c;--stone-600: #57534e;--stone-700: #44403c;--stone-800: #292524;--stone-900: #1c1917;--stone-950: #0c0a09;--emerald-500: #10b981;--red-500: #ef4444;--yellow-500: #eab308;--bg: var(--light);--bg-surface: var(--surface-light);--bg-card: var(--light);--fg: var(--stone-900);--fg-body: var(--stone-700);--fg-muted: #57534e;--fg-strong: var(--stone-900);--accent: var(--accent-light);--accent-hover: var(--accent-hover-light);--border: var(--border-light);--border-card: var(--stone-200);--key-bg: var(--light);--key-fg: var(--stone-900);--key-border: var(--stone-200);--key-shadow: 0 1px 0 0 var(--stone-200);--kbd-wrap-bg: var(--stone-300);--kbd-wrap-border: var(--stone-400);--zone-pinky-l: #fee2e2;--zone-ring-l: #fed7aa;--zone-middle-l: #fef9c3;--zone-index-l: #d1fae5;--zone-thumb-l: #e0f2fe;--zone-index-r: #cffafe;--zone-middle-r: #fef9c3;--zone-ring-r: #fed7aa;--zone-pinky-r: #fee2e2;--font-sans: "Inter Variable", "Inter", ui-sans-serif, system-ui, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--zf-content-max-width: 1080px}.dark{--bg: var(--dark);--bg-surface: var(--surface-dark);--bg-card: var(--stone-800);--fg: #fafaf9;--fg-body: var(--stone-300);--fg-muted: #a8a29e;--fg-strong: #fafaf9;--accent: var(--accent-dark);--accent-hover: var(--accent-hover-dark);--border: var(--border-dark);--border-card: var(--stone-700);--key-bg: var(--stone-800);--key-fg: #fafaf9;--key-border: var(--stone-700);--key-shadow: 0 1px 0 0 var(--stone-900);--kbd-wrap-bg: var(--stone-900);--kbd-wrap-border: var(--stone-700);--zone-pinky-l: #44171a;--zone-ring-l: #44291a;--zone-middle-l: #3c3a1a;--zone-index-l: #1a3a2a;--zone-thumb-l: #1a2e3a;--zone-index-r: #1a3438;--zone-middle-r: #3c3a1a;--zone-ring-r: #44291a;--zone-pinky-r: #44171a}.zf-app{font-family:var(--font-sans);-webkit-font-smoothing:antialiased;font-size:16px;line-height:1.6}.zf-app *,.zf-app *:before,.zf-app *:after{box-sizing:border-box}.zf-app a{color:inherit}.zf-app button{font-family:inherit;cursor:pointer}.zf-app h1,.zf-app h2,.zf-app h3,.zf-app h4{color:var(--fg-strong);margin:0 0 .5em;line-height:1.2;font-weight:700;letter-spacing:-.01em}.zf-app h1{font-size:clamp(1.875rem,1rem + 2.5vw,2.75rem);letter-spacing:-.02em}.zf-app h2{font-size:clamp(1.4rem,.9rem + 1.4vw,2rem)}.zf-app h3{font-size:1.15rem;font-weight:600}.zf-app h4{font-size:.95rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--fg-muted)}.zf-app p{margin:0 0 1rem;line-height:1.625}.zf-app code{font-family:var(--font-mono);font-size:.9em;background:#0ea5e91a;padding:.125em .4em;border-radius:6px}.dark .zf-app code{background:#38bdf81f}.zf-app .icon-btn{width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;border:1px solid var(--border);background:transparent;color:var(--fg)}.zf-app .icon-btn:hover{background:var(--bg-surface)}.zf-app .icon-btn svg{width:18px;height:18px}.zf-app .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:12px;border:2px solid var(--accent);background:var(--accent);color:var(--light);font-weight:600;font-size:14px;text-decoration:none;transition:background-color .15s,border-color .15s}.dark .zf-app .btn{color:var(--stone-900)}.zf-app .btn:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.zf-app .btn--ghost{background:transparent;color:var(--fg);border-color:var(--border-card)}.zf-app .btn--ghost:hover{background:var(--bg-surface);border-color:var(--border-card);color:var(--fg)}.dark .zf-app .btn--ghost{color:var(--fg)}.zf-app .btn svg{width:16px;height:16px}.zf-app .btn--sm{padding:7px 14px;font-size:13px;border-radius:9px}.zf-app .btn--lg{padding:14px 28px;font-size:15px}.zf-app .btn--full{width:100%}.zf-app .btn.is-disabled{opacity:.35;cursor:not-allowed;pointer-events:none}.zf-app .btn.is-active{background:var(--accent);border-color:var(--accent);color:var(--light);cursor:default}.dark .zf-app .btn.is-active{color:var(--stone-900)}.zf-app .zf-pagination{display:flex;flex-direction:column;align-items:center;gap:12px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border)}.zf-app .zf-pagination__info{font-size:13px;font-family:var(--font-mono)}.zf-app .zf-pagination__pages{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px}.zf-app .zf-pagination__ellipsis{padding:0 6px;font-family:var(--font-mono);font-size:13px}@media(min-width:640px){.zf-app .zf-pagination{flex-direction:row;justify-content:space-between}}.zf-app .grid{display:grid}.zf-app .grid--bg{background:var(--bg-surface)}.zf-app .grid-100{grid-template-columns:1fr}.zf-app .grid-50-50{grid-template-columns:1fr 1fr}.zf-app .grid-33-33-33{grid-template-columns:repeat(3,1fr)}.zf-app .grid-25-25-25-25{grid-template-columns:repeat(4,1fr)}.zf-app .grid-66-33{grid-template-columns:2fr 1fr}.zf-app .grid-33-66{grid-template-columns:1fr 2fr}@media(max-width:900px){.zf-app .grid-50-50,.zf-app .grid-33-33-33,.zf-app .grid-66-33,.zf-app .grid-33-66{grid-template-columns:1fr}}@media(max-width:899px){.zf-app .grid-25-25-25-25{grid-template-columns:1fr 1fr}}@media(max-width:499px){.zf-app .grid-25-25-25-25{grid-template-columns:1fr}}.zf-app .pad-sm,.zf-app .pad-md,.zf-app .pad-lg{padding:1rem}.zf-app .content-grid-divider.grid-50-50>.panel+.panel,.zf-app .content-grid-divider.grid-33-33-33>.panel+.panel,.zf-app .content-grid-divider.grid-25-25-25-25>.panel+.panel,.zf-app .content-grid-divider.grid-66-33>.panel+.panel,.zf-app .content-grid-divider.grid-33-66>.panel+.panel{border-left:1px solid var(--border)}@media(max-width:900px){.zf-app .content-grid-divider.grid-50-50>.panel+.panel,.zf-app .content-grid-divider.grid-33-33-33>.panel+.panel,.zf-app .content-grid-divider.grid-25-25-25-25>.panel+.panel,.zf-app .content-grid-divider.grid-66-33>.panel+.panel,.zf-app .content-grid-divider.grid-33-66>.panel+.panel{border-left:0;border-top:1px solid var(--border)}}@media(max-width:1139px){.zf-app .zf-dashboard-row,.zf-app .zf-detail-keyboard-row{grid-template-columns:1fr}}@media(min-width:1140px){.zf-app .zf-dashboard-row>*+*{border-left:1px solid var(--border)}}@media(max-width:1139px){.zf-app .zf-dashboard-row>*+*{border-top:1px solid var(--border)}}@media(min-width:901px){.zf-app .zf-divider-row>*+*{border-left:1px solid var(--border)}}@media(max-width:900px){.zf-app .zf-divider-row>*+*{border-top:1px solid var(--border)}}.zf-app .panel{background:transparent}.zf-app .eyebrow{display:inline-block;font-size:13px;font-weight:600;color:var(--accent);letter-spacing:.06em;text-transform:uppercase;margin-bottom:8px}.zf-app .lead{font-size:1.05rem;color:var(--fg-body);max-width:60ch}.zf-app .badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:4px;font-size:12px;font-weight:600;line-height:1.4}.zf-app .badge--neutral{background:var(--bg-surface);color:var(--fg);border:1px solid var(--border)}.zf-app .badge--primary{background:#0ea5e91a;color:var(--accent-hover-light)}.dark .zf-app .badge--primary{background:#38bdf81f;color:var(--accent-dark)}.zf-app .badge--locked{background:var(--bg-surface);color:var(--fg-muted);border:1px solid var(--border)}.zf-app .badge--success{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}.dark .zf-app .badge--success{background:#064e3b4d;color:#a7f3d0;border-color:#065f46}.zf-app .badge--mono{font-family:var(--font-mono);font-size:11px;letter-spacing:.02em}.zf-app .stat{display:flex;flex-direction:column;border:1px solid var(--border-card);border-radius:12px;overflow:hidden;background:var(--bg-card)}.zf-app .stat-bar{padding:10px 14px;background:var(--stone-900);color:var(--stone-50);font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;display:flex;align-items:center;justify-content:space-between}.dark .zf-app .stat-bar{background:var(--stone-50);color:var(--stone-900)}.zf-app .stat-bar svg{width:14px;height:14px;opacity:.7}.zf-app .stat-body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:4px}.zf-app .stat-value{font-family:var(--font-mono);font-size:28px;font-weight:700;color:var(--fg);line-height:1;letter-spacing:-.02em}.zf-app .stat-unit{font-family:var(--font-mono);font-size:13px;color:var(--fg-muted);margin-left:4px;font-weight:500}.zf-app .stat-sub{font-size:12px;color:var(--fg-muted)}.zf-app .stat-trend{display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:600;color:var(--emerald-500);font-family:var(--font-mono)}.zf-app .stat-trend.down{color:var(--red-500)}.zf-app .practice-stage{padding:1rem;display:flex;flex-direction:column;gap:24px}@media(max-width:768px){.zf-app .practice-stage{gap:18px}}.zf-app .practice-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;max-width:var(--zf-content-max-width);margin:0 auto;padding:0 4px;flex-wrap:wrap}.zf-app .practice-toolbar-left{display:flex;align-items:center;gap:12px;min-width:0}.zf-app .practice-toolbar-actions{display:flex;align-items:center;gap:4px}.zf-app .practice-toolbar-divider{width:1px;height:18px;background:var(--border);flex-shrink:0}.zf-app .practice-toolbar-title{font-size:13px;font-weight:500;color:var(--fg-muted);letter-spacing:.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.zf-app .icon-toggle-btn{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;border-radius:8px;border:1px solid transparent;background:transparent;color:var(--fg-muted);cursor:pointer;transition:background .12s ease,color .12s ease,border-color .12s ease}.zf-app .icon-toggle-btn:hover:not(:disabled){background:var(--bg-surface);color:var(--fg)}.zf-app .icon-toggle-btn:disabled{opacity:.4;cursor:not-allowed}.zf-app .icon-toggle-btn[aria-pressed=true]{background:var(--bg-surface);border-color:var(--accent);color:var(--accent)}.zf-app .icon-toggle-btn--accent:hover:not(:disabled){color:var(--accent)}@media(max-width:768px){.zf-app .practice-toolbar{gap:8px}.zf-app .practice-toolbar-title{font-size:12px}}.zf-app .live-stats{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:32px;width:100%;max-width:var(--zf-content-max-width);margin:0 auto;padding:0 4px}.zf-app .live-stats>div{display:flex;flex-direction:column;gap:2px;min-width:0}.zf-app .live-stats-label{font-size:10px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-muted)}.zf-app .live-stats-value{font-family:var(--font-mono);font-size:22px;font-weight:700;color:var(--fg);line-height:1;letter-spacing:-.02em;font-variant-numeric:tabular-nums}.zf-app .live-stats-value .unit{font-size:11px;color:var(--fg-muted);margin-left:4px;font-weight:500;font-variant-numeric:normal}.zf-app .live-stats-value.accent{color:var(--accent)}.zf-app .live-stats-value.error{color:var(--red-500)}@media(max-width:768px){.zf-app .live-stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px 12px}.zf-app .live-stats-value{font-size:20px}}.zf-app .text-track{background:var(--bg-card);border:1px solid var(--border-card);border-radius:16px;padding:32px 40px;min-height:200px;display:flex;flex-direction:column;gap:16px;position:relative;width:100%;max-width:var(--zf-content-max-width);margin-left:auto;margin-right:auto}.zf-app .text-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:12px;border-bottom:1px solid var(--border)}.zf-app .text-meta-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.zf-app .text-meta-label{font-size:12px;color:var(--fg-muted);font-weight:500}.zf-app .text-stream-flow{--zf-line-h: 40.8px ;overflow:hidden;min-height:calc(var(--zf-line-h) * 3);max-height:calc(var(--zf-line-h) * 3);position:relative}.zf-app .text-stream-flow-track{display:flex;flex-direction:column;transform:translateY(0);transition:transform .2s ease-out;will-change:transform}.zf-app .text-stream-flow-track.is-advancing{transform:translateY(var(--zf-line-h));transition:none}.zf-app .text-stream-line{font-family:var(--font-mono);font-size:24px;line-height:1.7;letter-spacing:.01em;color:var(--fg-body);user-select:none;word-break:keep-all;flex-shrink:0;height:var(--zf-line-h);white-space:nowrap;overflow:hidden;text-overflow:clip}.zf-app .text-stream-line--active{white-space:pre-wrap;word-break:break-word;overflow-wrap:anywhere;height:auto;min-height:var(--zf-line-h);overflow:visible}.zf-app .text-stream-line--active{opacity:1}.zf-app .text-stream-line--peek-1,.zf-app .text-stream-line--peek-2{white-space:pre-wrap;word-break:break-word;overflow-wrap:anywhere;height:auto;min-height:var(--zf-line-h);overflow:visible;text-overflow:clip}.zf-app .text-stream-line--peek-1{opacity:.55}.zf-app .text-stream-line--peek-2{opacity:.3}.zf-app .text-stream-line .ch-done{color:var(--fg)}.zf-app .text-stream-line .ch-error{color:var(--red-500);background:#ef444426;border-radius:3px}.dark .zf-app .text-stream-line .ch-error{background:#ef444433}.zf-app .text-stream-line .ch-current{background:var(--accent);color:var(--light);border-radius:3px;box-shadow:0 0 0 2px #0ea5e940;animation:zfBlink 1.1s infinite}.dark .zf-app .text-stream-line .ch-current{color:var(--stone-900);box-shadow:0 0 0 2px #38bdf840}.zf-app .text-stream-line .ch-space{display:inline-block;min-width:.55em}.zf-app .text-stream-line .ch-space.ch-error{background:#ef444433}.zf-app .text-stream-line .ch-tail{white-space:nowrap}@media(prefers-reduced-motion:reduce){.zf-app .text-stream-flow-track,.zf-app .text-stream-flow-track.is-advancing{transform:none;transition:none}}.zf-app .text-hint{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--fg-muted);padding-top:4px}.zf-app .text-hint kbd{font-family:var(--font-mono);font-size:11px;padding:2px 6px;border-radius:4px;background:var(--bg-surface);border:1px solid var(--border);color:var(--fg)}.zf-caps-warning{display:flex;align-items:center;gap:8px;margin:8px 0;padding:8px 12px;border-radius:6px;border:1px solid #c97e2c;background:#c97e2c14;color:#c97e2c;font-size:13px;line-height:1.4}.zf-caps-warning[hidden]{display:none}@keyframes zfBlink{0%,60%{opacity:1}80%,to{opacity:.55}}.zf-app .text-stream-line .ch-enter-prompt{display:inline-flex;align-items:center;justify-content:center;vertical-align:middle;transform:translateY(-.35em);margin-left:8px;padding:2px 8px;border-radius:4px;background:var(--bg-surface);color:var(--fg-muted);border:1px solid var(--border);font-size:14px;line-height:1;font-weight:600;opacity:.55;transition:opacity .12s ease,background .12s ease,color .12s ease}.zf-app .text-stream-line .ch-enter-prompt.is-active{background:var(--accent);color:var(--light);border-color:var(--accent);opacity:1;animation:zfEnterPulse 1.2s ease-in-out infinite}.dark .zf-app .text-stream-line .ch-enter-prompt.is-active{color:var(--stone-900)}@keyframes zfEnterPulse{0%,to{opacity:1}50%{opacity:.55}}.zf-app .text-stream-flow.is-paused{opacity:.55}.zf-app .text-stream-flow.is-paused .ch-current{animation:none}.zf-app .progress-bar{height:4px;background:var(--bg-surface);border-radius:2px;overflow:hidden}.zf-app .progress-bar-fill{height:100%;background:var(--accent);transition:width .15s ease}.zf-app .kbd-shell{container-type:inline-size;width:100%;display:flex;flex-direction:column;align-items:center;gap:16px}.zf-app .kbd-wrap{--zf-kbd-unit: clamp(36px, 5.2cqi, 48px);background:var(--kbd-wrap-bg);border:1px solid var(--kbd-wrap-border);border-radius:16px;padding:28px 24px;display:flex;flex-direction:column;gap:8px;align-items:center;width:100%;max-width:var(--zf-content-max-width);margin:0 auto}.zf-app .kbd-hint{display:none}@container (max-width: 679px){.zf-app .kbd-wrap{display:none}.zf-app .kbd-hint{display:block;width:100%;max-width:480px;margin:0;padding:20px 24px;background:var(--kbd-wrap-bg);border:1px dashed var(--kbd-wrap-border);border-radius:12px;color:var(--fg-muted);font-size:13px;line-height:1.5;text-align:center}}.zf-app .kbd-wrap .kbd-row{flex-shrink:0}.zf-app .kbd-row{display:flex;gap:calc(var(--zf-kbd-unit) * .125)}.zf-app .kbd-key{--w: var(--zf-kbd-unit);width:var(--w);min-width:var(--w);height:var(--zf-kbd-unit);border-radius:8px;background:var(--key-bg);color:var(--key-fg);border:1px solid var(--key-border);box-shadow:var(--key-shadow);display:inline-flex;flex-direction:column;align-items:flex-start;justify-content:flex-end;padding:4px 8px;font-family:var(--font-mono);font-size:calc(var(--zf-kbd-unit) * .29);font-weight:600;position:relative;transition:background .12s,color .12s,transform .08s,box-shadow .12s}.zf-app .kbd-key.wide{--w: calc(var(--zf-kbd-unit) * 1.5)}.zf-app .kbd-key.x-wide{--w: calc(var(--zf-kbd-unit) * 2)}.zf-app .kbd-key.shift{--w: calc(var(--zf-kbd-unit) * 1.25)}.zf-app .kbd-key.shift[data-id=ShiftRight]{--w: calc(var(--zf-kbd-unit) * 2.875)}.zf-app .kbd-key.return{--w: calc(var(--zf-kbd-unit) * 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