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lab,red,red)){.dark\:aria-invalid\:ring-destructive\/40:is(.dark *)[aria-invalid=true]{--tw-ring-color:color-mix(in oklab, var(--destructive) 40%, transparent)}}.\[\&_span\]\:text-\[var\(--color-accent\)\] span{color:var(--color-accent)}@media(min-width:1001px){.\[\&_span\]\:min-\[1001px\]\:text-\[length\:var\(--font-size-20\)\] span{font-size:var(--font-size-20)}.\[\&_span\]\:min-\[1001px\]\:leading-none span{--tw-leading:1;line-height:1}}.\[\&_svg\]\:pointer-events-none svg{pointer-events:none}.\[\&_svg\]\:shrink-0 svg{flex-shrink:0}.\[\&_svg\:not\(\[class\*\=\'size-\'\]\)\]\:size-3 svg:not([class*=size-]){width:calc(var(--spacing) * 3);height:calc(var(--spacing) * 3)}.\[\&_svg\:not\(\[class\*\=\'size-\'\]\)\]\:size-3\.5 svg:not([class*=size-]){width:calc(var(--spacing) * 3.5);height:calc(var(--spacing) * 3.5)}.\[\&_svg\:not\(\[class\*\=\'size-\'\]\)\]\:size-4 svg:not([class*=size-]){width:calc(var(--spacing) * 4);height:calc(var(--spacing) * 4)}}@property --tw-animation-delay{syntax:"*";inherits:false;initial-value:0s}@property --tw-animation-direction{syntax:"*";inherits:false;initial-value:normal}@property --tw-animation-duration{syntax:"*";inherits:false}@property --tw-animation-fill-mode{syntax:"*";inherits:false;initial-value:none}@property --tw-animation-iteration-count{syntax:"*";inherits:false;initial-value:1}@property --tw-enter-blur{syntax:"*";inherits:false;initial-value:0}@property --tw-enter-opacity{syntax:"*";inherits:false;initial-value:1}@property --tw-enter-rotate{syntax:"*";inherits:false;initial-value:0}@property --tw-enter-scale{syntax:"*";inherits:false;initial-value:1}@property --tw-enter-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-enter-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-blur{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-opacity{syntax:"*";inherits:false;initial-value:1}@property --tw-exit-rotate{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-scale{syntax:"*";inherits:false;initial-value:1}@property --tw-exit-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-translate-y{syntax:"*";inherits:false;initial-value:0}@property --scroll-fade-t{syntax:"<length-percentage>";inherits:false;initial-value:0}@property --scroll-fade-b{syntax:"<length-percentage>";inherits:false;initial-value:0}@property --scroll-fade-s{syntax:"<length-percentage>";inherits:false;initial-value:0}@property --scroll-fade-e{syntax:"<length-percentage>";inherits:false;initial-value:0}@property --scroll-fade-mask{syntax:"*";inherits:false}@property --shimmer-angle{syntax:"<angle>";inherits:true;initial-value:20deg}@property --shimmer-image{syntax:"*";inherits:false}@property --shimmer-text-fill{syntax:"*";inherits:false}@media(prefers-reduced-motion:reduce){.shimmer{-webkit-text-fill-color:currentColor;background-image:none;animation:none}}:root{--background:var(--color-surface-canvas);--foreground:var(--color-text-primary);--card:var(--color-surface-panel);--card-foreground:var(--color-text-primary);--popover:var(--color-surface-raised);--popover-foreground:var(--color-text-primary);--primary:var(--color-positive);--primary-foreground:var(--color-surface-positive);--secondary:var(--color-surface-selected);--secondary-foreground:var(--color-text-primary);--muted:var(--color-surface-selected);--accent:var(--color-surface-selected);--destructive:var(--color-danger);--border:var(--color-stroke-strong);--chart-1:var(--color-accent-pale);--chart-2:var(--color-accent);--chart-3:var(--color-accent-muted);--chart-4:var(--color-positive-muted);--chart-5:var(--color-positive);--muted-foreground:var(--color-text-muted);--accent-foreground:var(--color-text-primary);--input:var(--color-stroke-strong);--ring:var(--color-positive);--sidebar:var(--color-surface-panel);--sidebar-foreground:var(--color-text-primary);--sidebar-primary:var(--color-positive);--sidebar-primary-foreground:var(--color-surface-positive);--sidebar-accent:var(--color-surface-selected);--sidebar-accent-foreground:var(--color-text-primary);--sidebar-border:var(--color-stroke-strong);--sidebar-ring:var(--color-positive)}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-z{syntax:"*";inherits:false;initial-value:0}@keyframes tw-shimmer{0%{background-position:100% 0}to{background-position:0 0}}:root{--color-white: #fff;--color-text-primary: #eef0f4;--color-positive-muted: #66836f;--color-surface-canvas: #0d0e12;--color-surface-selected: #292b38;--color-positive: #bad8c2;--color-surface-positive-raised: #26332b;--color-stroke-strong: #41424e;--color-accent-landing: #b8afc7;--color-surface-positive: #142019;--color-surface-panel: #15161b;--color-stroke-hover: #484a56;--color-surface-raised: #202127;--color-positive-strong: #668d70;--color-text-faint: #747783;--color-text-muted: #9195a1;--color-accent-soft: #a8a6d5;--color-accent-control: #d0cfe9;--color-text-soft: #daddf0;--color-danger-light: #ffc2c5;--color-surface-danger: #302025;--color-stroke-subtle: #31333d;--color-stroke-positive-subtle: #343b37;--color-stroke: #383a44;--color-surface-danger-raised: #44282e;--color-stroke-emphasis: #50515e;--color-stroke-positive: #537167;--color-stroke-highlight: #555b68;--color-positive-deep: #55775f;--color-stroke-accent: #595b77;--color-stroke-warning: #5d5548;--color-stroke-contrast: #616473;--color-accent-deep: #696ba5;--color-stroke-danger: #704349;--color-positive-emphasis: #719b82;--color-accent-muted: #777ab4;--color-accent-strong: #7f82ca;--color-accent-medium: #8582b8;--color-text-dim: #888ba1;--color-text-landing-muted: #a0a0aa;--color-danger-deep: #a3595e;--color-accent-luminous: #a7a9ef;--color-text-landing-soft: #aaa8b0;--color-accent: #b0b2f5;--color-warning-deep: #b69c69;--color-text-secondary-dim: #b6b8c3;--color-accent-key: #bab8e6;--color-text-secondary: #bfc1c9;--color-accent-pale: #c6c7ff;--color-positive-light: #ccebd4;--color-text-landing-secondary: #d1cdd6;--color-accent-light: #d6d6ff;--color-text-neutral: #d6d7df;--color-text-landing: #e6e5e9;--color-danger: #e7a0a0;--color-warning: #e7d5aa;--color-accent-white: #e8e8ff;--color-danger-pale: #ffe0e0;--color-shadow-soft: #0004;--color-shadow: #0008;--color-shadow-strong: #000a;--color-glass-deep: #101115ee;--color-glass: #17181de6;--color-glass-raised: #1b1c23f5;--color-glass-landing: #1b1b21a8;--color-glow-deep: #26263d48;--color-glow-accent: #46456950;--color-glow-landing-soft: #42404e24;--color-glow-landing: #4e4a5d44;--color-glow-blue: #7075aa65;--color-glow-positive: #a8dfb777;--color-glow-accent-soft: #b0b2f577;--color-glow-positive-soft: #bad8c224;--color-white-sheen: #ffffff19;--wave-grid: #303136;--wave-halo: #398cff;--wave-primary: #a5ceff;--wave-secondary: #8eb7eb;--wave-ambient: #3178cc19;--wave-signal-grid: #80a9d2;--wave-signal-shadow: #489dffb3;--wave-spectrum-low: #a9c8ec;--wave-spectrum-high: #6a788e}:root{--font-family-interface: "Geist Mono", ui-monospace, monospace;--font-family-landing: Inter, Arial, sans-serif;--font-family-key-hint: ui-monospace, monospace;--font-size-8: 8px;--font-size-10: 10px;--font-size-11: 11px;--font-size-12: 12px;--font-size-14: 14px;--font-size-16: 16px;--font-size-18: 18px;--font-size-20: 20px;--font-size-24: 24px;--font-size-30: 30px;--font-size-34: 34px;--font-size-75: 75px;--font-size-page-title: clamp(28px, 3vw, 43px);--font-size-onboarding-title: clamp(25px, 6vw, 32px);--font-size-lesson-description: clamp(15px, 1.2vw, 17px);--font-size-learn-title: clamp(30px, 2.7vw, 40px);--font-size-reference-title: clamp(19px, 2vw, 27px);--font-size-landing-hero-title: clamp(48px, 5.1vw, 78px);--font-size-landing-tagline: clamp(17px, 1.35vw, 21px);--font-size-landing-demo-title: clamp(24px, 2.3vw, 34px);--font-size-landing-features-title: clamp(34px, 3.3vw, 50px);--font-size-landing-hero-title-narrow: clamp(47px, 5.9vw, 66px);--font-size-landing-hero-title-tablet: clamp(48px, 8vw, 70px);--font-size-landing-hero-title-phone: clamp(45px, 11vw, 61px)}.app-shell{min-height:100svh}.topbar{height:58px;padding:0 clamp(16px,3vw,44px);align-items:center;border-bottom:1px solid var(--color-stroke-subtle);position:sticky;top:0;z-index:30;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.menu-button{width:32px;height:34px;display:grid;align-content:center;gap:4px;padding:7px;border:0;background:transparent;border-radius:6px}.menu-button:hover{background:var(--color-white-sheen)}.menu-button span{display:block;width:18px;height:1.5px;background:var(--color-text-neutral);border-radius:2px}.brand{white-space:nowrap;display:flex;align-items:center}.brand-mark{font-size:var(--font-size-24);font-weight:400}.main-area{max-width:1530px;margin:0 auto;padding:34px clamp(15px,3vw,44px) 230px}.main-simple{padding-bottom:80px}.lesson-progress-bar{position:sticky;top:58px;z-index:22;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 16px;border:1px solid var(--color-stroke);border-radius:8px;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}.lesson-progress-bar.complete{border-color:var(--color-stroke-positive)}.progress-copy{min-width:0;flex:1;max-width:680px}.progress-label{display:flex;justify-content:space-between;gap:12px;font-size:var(--font-size-11);color:var(--color-text-neutral);font-weight:700;letter-spacing:.08em}.progress-label span{color:var(--color-accent);letter-spacing:0}.progress-track{margin-top:7px;height:3px;background:var(--color-stroke);border-radius:9px;overflow:hidden}.progress-track span{display:block;height:100%;background:var(--color-accent);transition:width .18s}.lesson-progress-bar.complete .progress-track span{background:var(--color-positive)}.progress-copy p{margin:6px 0 0;color:var(--color-text-muted);font-size:var(--font-size-11);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lesson-copy{margin-top:19px;border:1px solid var(--color-stroke-subtle);border-radius:8px;background:var(--color-surface-canvas);overflow:hidden}.lesson-task small{font-weight:700;letter-spacing:.12em}.lesson-task p{margin:6px 0 0}.details-toggle{width:100%;text-align:left;display:flex;justify-content:space-between;padding:10px 18px;background:transparent;border:0;color:var(--color-text-secondary);font-size:var(--font-size-11)}.lesson-details{padding:1px 18px 15px;color:var(--color-text-secondary);font-size:var(--font-size-12);line-height:1.55}.lesson-details p{margin:8px 0}.lesson-focus{margin-top:12px}.lesson-focus small{color:var(--color-accent)}.lesson-focus div{display:flex;flex-wrap:wrap;gap:5px;margin-top:7px}.lesson-focus span{border:1px solid var(--color-stroke-hover);border-radius:5px;padding:5px 7px;font-size:var(--font-size-10)}.lesson-details-row{border-top:1px solid var(--color-stroke-subtle)}.lesson-details-anchor{width:100%}.details-toggle{border-top:0}.lesson-jump{display:flex;gap:8px;margin-top:20px}.lesson-jump :is(button,a){color:var(--color-text-muted);background:var(--color-surface-panel);border:1px solid var(--color-stroke-subtle);border-radius:6px;padding:7px 11px;font-size:var(--font-size-11);text-decoration:none}.lesson-jump :is(button,a).active{color:var(--color-text-primary);border-color:var(--color-text-faint);background:var(--color-surface-selected)}.lesson-chips{display:flex;gap:5px;overflow-x:auto;margin:10px 0 18px}.lesson-chips :is(button,a){width:32px;height:31px;flex:0 0 32px;display:grid;place-items:center;border:1px solid var(--color-stroke-subtle);border-radius:5px;color:var(--color-text-muted);background:var(--color-surface-panel);font-size:var(--font-size-10);text-decoration:none}.lesson-chips :is(button,a).active{color:var(--color-white);background:var(--color-surface-selected)}.studio-layout{display:grid;grid-template-columns:minmax(280px,.78fr) minmax(0,1.35fr);gap:15px;align-items:start}.visual-column{position:sticky;top:68px;min-width:0}.wave-display{min-width:0;padding:15px;border:1px solid var(--color-stroke-subtle);border-radius:8px;background:radial-gradient(ellipse at 74% 20%,var(--color-glow-deep),transparent 48%),var(--color-surface-canvas);overflow:hidden}.visual-head,.visual-footer{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--color-text-muted);font-size:var(--font-size-10);font-weight:650;letter-spacing:.1em}.visual-status.active{color:var(--color-positive)}.wave-display 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var(--color-shadow-strong)}.keyboard-heading{justify-content:space-between;color:var(--color-text-secondary)}.keyboard-toggle{display:flex;align-items:center;gap:8px;border:0;background:transparent;color:var(--color-text-soft);font-size:var(--font-size-11);font-weight:700;letter-spacing:.09em}.keyboard-toolbar{display:flex;align-items:center;font-size:var(--font-size-10)}.keyboard-toolbar button{font-size:var(--font-size-16);color:var(--color-text-secondary-dim);background:transparent;border:0}.keyboard{position:relative;display:flex;width:100%;height:116px;touch-action:none;user-select:none;-webkit-user-select:none}.keyboard button{touch-action:none;-webkit-tap-highlight-color:transparent}.white-key{flex:1;min-width:0;border:1px solid var(--color-text-secondary-dim);border-radius:0 0 5px 5px;background:linear-gradient(var(--color-text-primary),var(--color-text-secondary));color:var(--color-stroke-contrast);display:flex;align-items:flex-end;justify-content:center;padding:0 0 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