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var(--color-well-edge))}}.run-button{background:#1f231e}@supports (color:color-mix(in lab, red, red)){.run-button{background:color-mix(in srgb, var(--color-pine) 12%, var(--color-well))}}.run-button{color:var(--color-pine);box-shadow:0 0 #7fa98a42}@supports (color:color-mix(in lab, red, red)){.run-button{box-shadow:0 0 0 0 color-mix(in srgb, var(--color-pine) 26%, transparent)}}.run-button{animation:2.4s ease-in-out infinite run-button-breathe}.run-button:hover{border-color:var(--color-pine);background:#272e26}@supports (color:color-mix(in lab, red, red)){.run-button:hover{background:color-mix(in srgb, var(--color-pine) 19%, var(--color-well))}}.run-button:hover{color:var(--color-paper);animation-play-state:paused}.run-button:disabled{cursor:wait;opacity:.78}.run-button-dot{background:currentColor;border-radius:50%;width:.42rem;height:.42rem;animation:1.2s ease-in-out infinite run-button-dot;box-shadow:0 0 .55rem}.playground-output{border:1px solid #414b40;margin-top:.25rem;overflow:hidden}@supports (color:color-mix(in lab, red, red)){.playground-output{border:1px solid color-mix(in srgb, var(--color-pine) 27%, var(--color-well-edge))}}.playground-output{background:#171816;border-radius:.75rem;box-shadow:inset 0 1px #ebe4d60a}@supports (color:color-mix(in lab, red, red)){.playground-output{box-shadow:inset 0 1px 0 color-mix(in srgb, var(--color-paper) 4%, transparent)}}.playground-output-title{border-bottom:1px solid #393f36;justify-content:space-between;padding:.55rem .8rem;display:flex}@supports (color:color-mix(in lab, red, red)){.playground-output-title{border-bottom:1px solid color-mix(in srgb, var(--color-pine) 18%, var(--color-well-edge))}}.playground-output-title{color:var(--color-mute);font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;font-size:10px}.playground-prompt{color:var(--color-pine);margin-right:.55rem;font-size:1.15em}.playground-output pre{min-height:4.3rem;color:var(--color-ash);font-family:var(--font-mono);white-space:pre-wrap;margin:0;padding:.85rem .9rem 1rem;font-size:12px;line-height:1.65;overflow:auto}.playground-output pre.playground-error{color:#d8896f}@supports (color:color-mix(in lab, red, red)){.playground-output pre.playground-error{color:color-mix(in srgb, var(--color-ember) 84%, var(--color-paper))}}.lesson-nav-link{border-left:1px solid #4c535d;flex-direction:column;flex:1 1 0;gap:.32rem;min-width:0;padding:.55rem .8rem;display:flex}@supports (color:color-mix(in lab, red, red)){.lesson-nav-link{border-left:1px solid color-mix(in srgb, var(--color-dusk) 34%, var(--color-rule))}}.lesson-nav-link{color:var(--color-ink);font-family:var(--font-serif);background:0 0;font-size:1.06rem;line-height:1.25;transition:border-color .16s,color .16s}.lesson-nav-link:hover{border-color:var(--color-ember);color:var(--color-paper)}.lesson-nav-label{color:#979592}@supports (color:color-mix(in lab, red, 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