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var(--gt-border);background:var(--gt-raised);width:48px;height:48px;color:var(--gt-text);cursor:pointer;border-radius:50%;place-items:center;display:none;position:fixed;bottom:76px;right:16px}.gt-notes-dot{background:var(--gt-spark);border-radius:50%;width:8px;height:8px;position:absolute;top:9px;right:9px}.gt-sheet-scrim{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:40;background:#05070580;position:fixed;inset:0}.gt-notes-sheet{z-index:45;border-radius:20px 20px 0 0;transition:transform .25s;display:none;position:fixed;bottom:0;left:0;right:0;transform:translateY(105%)}.gt-notes-sheet.is-open{transform:none}.gt-sheet-handle{background:var(--gt-text);border-radius:3px;width:44px;height:5px}@supports (color:color-mix(in lab,red,red)){.gt-sheet-handle{background:color-mix(in srgb,var(--gt-text) 22%,transparent)}}.gt-sheet-handle{margin:0 auto}.gt-sheet-close{background:var(--gt-text);border:0;border-radius:12px;place-items:center;width:44px;height:44px;display:grid}@supports (color:color-mix(in lab,red,red)){.gt-sheet-close{background:color-mix(in srgb,var(--gt-text) 6%,transparent)}}.gt-sheet-close{color:var(--gt-text);cursor:pointer}.gt-nudge{background:var(--gt-raised);border:1px solid var(--gt-border);z-index:38;border-radius:16px;flex-wrap:wrap;align-items:center;gap:.9rem;max-width:min(640px,100vw - 32px);padding:.9rem 1.1rem;display:flex;position:fixed;bottom:1rem;left:50%;transform:translate(-50%);box-shadow:0 12px 32px #00000073}.gt-nudge-copy{flex-direction:column;gap:.1rem;font-size:13px;display:flex}.gt-nudge-copy strong{font-size:14px}.gt-nudge-copy span{color:var(--gt-muted)}@media (max-width:980px){.gt-lesson-body{grid-template-columns:1fr}.gt-notes-panel{display:none}.gt-notes-toggle{display:grid}.gt-notes-sheet{max-height:60vh;display:flex}.gt-step-pos{display:none}}.gt-block-head{justify-content:space-between;align-items:center;gap:.8rem;display:flex}.gt-block-kicker{color:var(--gt-phase,var(--gt-spark));align-items:center;gap:.45rem;display:inline-flex}.gt-live-dot{background:var(--gt-spark);width:7px;height:7px;box-shadow:0 0 8px var(--gt-spark);border-radius:50%}@supports (color:color-mix(in lab,red,red)){.gt-live-dot{box-shadow:0 0 8px color-mix(in srgb,var(--gt-spark) 60%,transparent)}}.gt-textbtn{color:var(--gt-spark);cursor:pointer;background:0 0;border:0;align-items:center;padding:.4rem .6rem;font-size:13px;font-weight:700;display:inline-flex}.hotspot-marker{background:0 0;border:0;place-items:center;width:44px;height:44px;padding:0;display:grid}.hotspot-marker .hotspot-halo{border:2px solid var(--gt-spark);border-radius:50%;width:26px;height:26px;animation:hspulse 2.2s ease-out infinite;position:absolute}@keyframes hspulse{0%{opacity:.9;transform:scale(1)}70%{opacity:0;transform:scale(1.9)}to{opacity:0;transform:scale(1.9)}}.hotspot-marker .hotspot-index{background:var(--gt-spark);width:26px;height:26px;color:var(--gt-spark-ink);box-shadow:0 0 12px var(--gt-spark);font-size:15px;font-weight:700}@supports (color:color-mix(in lab,red,red)){.hotspot-marker .hotspot-index{box-shadow:0 0 12px color-mix(in srgb,var(--gt-spark) 50%,transparent)}}.hotspot-marker .hotspot-label{font-family:var(--font-mono),monospace;color:var(--gt-muted);font-size:9px;position:absolute;bottom:-2px;right:0}.hotspot-marker.is-active .hotspot-index{outline:2px solid var(--gt-spark);outline-offset:2px;border:2px solid var(--gt-spark-ink);width:30px;height:30px}.hotspot-marker.is-viewed:not(.is-active) .hotspot-index{background:var(--gt-spark)}@supports (color:color-mix(in lab,red,red)){.hotspot-marker.is-viewed:not(.is-active) .hotspot-index{background:color-mix(in srgb,var(--gt-spark) 18%,transparent)}}.hotspot-marker.is-viewed:not(.is-active) .hotspot-index{color:var(--gt-spark);border:1px solid var(--gt-spark);box-shadow:none}.hotspot-detail{background:var(--gt-raised);border:1px solid var(--gt-spark)}@supports (color:color-mix(in lab,red,red)){.hotspot-detail{border:1px solid color-mix(in srgb,var(--gt-spark) 40%,transparent)}}.hotspot-detail{border-radius:14px;padding:1rem 1.2rem;box-shadow:0 12px 32px #0000008c}:is([data-skin=retro-os][data-mode=morning],[data-skin=retro-os][data-mode=midday]) .hotspot-detail{box-shadow:0 12px 32px #13171226}.hotspot-detail h3{font-family:var(--font-ui),sans-serif;color:var(--gt-spark);margin:0 0 .3rem;font-size:13.5px}.hotspot-detail .lesson-md p{font-size:12.5px;line-height:1.6}.hotspot-detail-foot{align-items:center;gap:.6rem;display:flex}.hotspot-detail-foot .mono-label{margin-left:auto}.gt-branch{background:var(--gt-text);border:1px solid #0000;border-radius:12px;align-items:center;gap:.4rem;min-height:44px;padding:.55rem 1.1rem;display:inline-flex}@supports (color:color-mix(in lab,red,red)){.gt-branch{background:color-mix(in srgb,var(--gt-text) 5%,transparent)}}.gt-branch{color:var(--gt-muted);cursor:pointer;font-size:14px;font-weight:600}.gt-branch.is-chosen{background:var(--gt-spark);color:var(--gt-spark-ink);box-shadow:var(--gt-glow)}.flow-reset{align-self:flex-start}.ramp-stage{touch-action:none;padding-top:3.4rem;position:relative}.ramp-tooltip{background:var(--gt-raised);white-space:nowrap;pointer-events:none;border:1px solid;border-radius:10px;flex-direction:column;gap:.1rem;padding:.45rem .7rem;font-size:12px;display:flex;position:absolute;top:0;transform:translate(-50%)}.ramp-tooltip span{color:var(--gt-muted)}.ramp-phases{flex-wrap:wrap;justify-content:space-between;display:flex}.ramp-phase{font-family:var(--font-mono),monospace;cursor:pointer;background:0 0;border:0;padding:.4rem;font-size:11px;font-weight:600}.ramp-phase.is-active{text-underline-offset:3px;font-weight:700;text-decoration:underline}.check-progress{gap:4px;display:flex}.check-progress span{background:var(--gt-text);border-radius:2px;flex:1;height:4px}@supports (color:color-mix(in lab,red,red)){.check-progress span{background:color-mix(in srgb,var(--gt-text) 12%,transparent)}}.check-progress span.is-done{background:var(--gt-phase,var(--gt-spark))}.lesson-selfcheck.is-passed{border:1px solid var(--gt-spark)}@supports (color:color-mix(in lab,red,red)){.lesson-selfcheck.is-passed{border:1px solid color-mix(in srgb,var(--gt-spark) 45%,transparent)}}.lesson-selfcheck.is-passed{box-shadow:var(--gt-glow);border-radius:16px;padding:1.2rem}.check-question{border:1px solid var(--gt-border-soft);background:var(--gt-surface)}.check-question legend{font-family:var(--font-ui),sans-serif;font-size:16.5px}.check-option{border:1px solid var(--gt-text);align-items:center;gap:.65rem;min-height:44px;display:flex}@supports (color:color-mix(in lab,red,red)){.check-option{border:1px solid color-mix(in srgb,var(--gt-text) 14%,transparent)}}.check-option{color:var(--gt-body);cursor:pointer;background:0 0;border-radius:12px;padding:.5rem .8rem;font-size:14px}.check-option .check-radio{border:1.6px solid var(--gt-text);border-radius:50%;place-items:center;width:18px;height:18px;display:grid}@supports (color:color-mix(in lab,red,red)){.check-option .check-radio{border:1.6px solid color-mix(in srgb,var(--gt-text) 30%,transparent)}}.check-option .check-radio{flex-shrink:0;font-size:10px}.check-option.is-selected{border-color:var(--gt-spark);background:var(--gt-spark)}@supports (color:color-mix(in lab,red,red)){.check-option.is-selected{background:color-mix(in srgb,var(--gt-spark) 10%,transparent)}}.check-option.is-selected{color:var(--gt-text)}.check-option.is-selected .check-radio{border-color:var(--gt-spark);color:var(--gt-spark)}.check-feedback{border-radius:10px;padding:.6rem .8rem;font-size:13px}.check-feedback.is-correct{background:var(--gt-spark)}@supports (color:color-mix(in lab,red,red)){.check-feedback.is-correct{background:color-mix(in srgb,var(--gt-spark) 8%,transparent)}}.check-feedback.is-correct{border:1px solid var(--gt-spark)}@supports (color:color-mix(in lab,red,red)){.check-feedback.is-correct{border:1px solid color-mix(in srgb,var(--gt-spark) 35%,transparent)}}.check-feedback.is-correct{color:var(--gt-text)}.check-feedback.is-incorrect{background:var(--gt-text)}@supports (color:color-mix(in lab,red,red)){.check-feedback.is-incorrect{background:color-mix(in srgb,var(--gt-text) 4%,transparent)}}.check-feedback.is-incorrect{border:1px solid var(--gt-border);color:var(--gt-body)}.check-result{border-radius:14px;flex-wrap:wrap;align-items:center;gap:1rem;padding:1rem;display:flex}.check-coin{background:var(--gt-phase,var(--gt-spark));width:76px;height:76px;color:var(--gt-spark-ink);box-shadow:0 0 20px var(--gt-phase,var(--gt-spark));border-radius:50%;place-items:center;font-size:30px;font-weight:700;display:grid}@supports (color:color-mix(in lab,red,red)){.check-coin{box-shadow:0 0 20px color-mix(in srgb,var(--gt-phase,var(--gt-spark)) 45%,transparent)}}.check-coin{flex-shrink:0}:is([data-skin=retro-os][data-mode=morning],[data-skin=retro-os][data-mode=midday]) .check-coin{box-shadow:none;color:#fff}.check-coin.is-unearned{border:1.5px dashed var(--gt-text);background:0 0}@supports (color:color-mix(in lab,red,red)){.check-coin.is-unearned{border:1.5px dashed color-mix(in srgb,var(--gt-text) 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lab,red,red)){.lesson-tryit{border:1px solid color-mix(in srgb,var(--gt-spark) 30%,transparent)}}.lesson-tryit{border-left-width:1px;border-radius:16px;padding:1.1rem 1.3rem}.lesson-tryit.is-done{border:1.5px solid var(--gt-spark);background:var(--gt-spark)}@supports (color:color-mix(in lab,red,red)){.lesson-tryit.is-done{background:color-mix(in srgb,var(--gt-spark) 5%,transparent)}}.lesson-tryit.is-done{box-shadow:var(--gt-glow)}.gt-tryit-task p{font-family:var(--font-ui),sans-serif;font-size:17px}.gt-tryit-task.is-struck p{text-decoration:line-through;-webkit-text-decoration-color:var(--gt-spark);text-decoration-color:var(--gt-spark)}@supports (color:color-mix(in lab,red,red)){.gt-tryit-task.is-struck p{-webkit-text-decoration-color:color-mix(in srgb,var(--gt-spark) 60%,transparent);text-decoration-color:color-mix(in srgb,var(--gt-spark) 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gt-spark{0%,15%{opacity:0;transform:scale(.3)}45%{opacity:1;transform:scale(1)}75%,to{opacity:0;transform:scale(.3)}}@media (prefers-reduced-motion:reduce){.gt-bot .gt-bot-armL,.gt-bot .gt-bot-armR,.gt-bot .gt-bot-eye,.gt-bot .gt-bot-svg,.gt-bot-spark,.gt-bot-z{animation:none!important}}.gt-tryit-bot{position:absolute;top:-18px;right:14px}.lesson-tryit{position:relative}.gt-notes-bot{align-self:center}.gt-unwritten{background:var(--gt-surface);border:1px dashed var(--gt-border);border-radius:16px;flex-direction:column;align-items:flex-start;gap:.7rem;max-width:480px;margin:3rem auto;padding:1.6rem 1.8rem;display:flex}.gt-unwritten p{color:var(--gt-muted);margin:0;font-size:15px}.lesson-tap{min-width:44px;min-height:44px}.lesson-step{border-bottom:1px solid var(--border-soft);flex-direction:column;gap:.8rem;padding:1.5rem 0;display:flex}.lesson-step h2{margin:0;font-size:1.3rem}.lesson-md p,.lesson-md ul{color:var(--text);margin:0 0 .8rem}.lesson-md a{color:var(--accent)}.lesson-hint{color:var(--muted);margin:0;font-size:.9rem}.lesson-done-mark{color:var(--ok)}.lesson-error,.lesson-fallback{border:1px dashed var(--danger);color:var(--danger);border-radius:8px;padding:1rem}.lesson-terminal__screen{font-family:var(--font-mono,ui-monospace,SFMono-Regular,monospace);color:#d7e2d0;border:1px solid var(--border);background:#0c0f14;border-radius:6px;flex-direction:column;gap:.35rem;padding:.9rem 1rem;display:flex;overflow-x:auto}.lesson-terminal__line{white-space:pre-wrap;word-break:break-word}.lesson-terminal__feedback{color:#f0b072}.lesson-terminal.is-solved .lesson-terminal__feedback{color:#9ad39a}.lesson-terminal__input{flex-wrap:wrap;align-items:center;gap:.5rem;margin-top:.6rem;display:flex}.lesson-terminal__input input{min-height:44px;font-family:var(--font-mono,ui-monospace,SFMono-Regular,monospace);background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:4px;flex:12rem;padding:0 .7rem}.lesson-pbuilder__gap{flex-direction:column;gap:.3rem;display:flex}.lesson-pbuilder__gap label{font-size:.9rem;font-weight:600}.lesson-pbuilder__gap input,.lesson-pbuilder__gap textarea{background:var(--bg);width:100%;min-height:44px;color:var(--text);border:1px solid var(--border);font:inherit;border-radius:4px;padding:.5rem .7rem}.lesson-pbuilder__hint{color:var(--muted);font-size:.82rem}.lesson-pbuilder__out{white-space:pre-wrap;word-break:break-word;font-family:var(--font-mono,ui-monospace,SFMono-Regular,monospace);background:var(--bg);border:1px solid var(--border);border-radius:4px;padding:.8rem}.lesson-compare__opts{grid-template-columns:repeat(2,minmax(0,1fr));gap:.8rem;display:grid}@media (max-width:640px){.lesson-compare__opts{grid-template-columns:minmax(0,1fr)}}.lesson-compare__opt{text-align:left;border:1.5px solid var(--border);background:var(--bg);color:var(--text);cursor:pointer;border-radius:4px;padding:.9rem}.lesson-compare__opt.is-selected{border-color:var(--accent)}.lesson-compare__opt.is-correct{border-color:var(--ok);box-shadow:inset 0 0 0 1px var(--ok)}.lesson-compare__reasons{flex-direction:column;gap:.5rem;display:flex}.lesson-compare__reason{text-align:left;border:1px solid var(--border);background:var(--bg);color:var(--text);cursor:pointer;border-radius:4px;padding:.6rem .8rem}.lesson-compare__reason.is-correct{border-color:var(--ok)}.lesson-compare__nudge{color:var(--muted);font-size:.88rem}.lesson-dragorder__list{flex-direction:column;gap:.5rem;display:flex}.lesson-dragorder__item{border:1.5px solid var(--border);background:var(--bg);color:var(--text);text-align:left;cursor:pointer;border-radius:4px;justify-content:space-between;align-items:center;gap:.6rem;padding:.6rem .8rem;display:flex}.lesson-dragorder__item.is-picked{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}.lesson-dragorder__controls{gap:.3rem;display:flex}.lesson-dragorder__feedback{color:var(--muted);font-size:.88rem}.lesson-dragorder__status{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.hotspot-scene{position:relative}.hotspot-backdrop{width:100%;display:block}.hotspot-marker{border:1px solid var(--border);background:var(--bg);min-width:44px;min-height:44px;color:var(--text);cursor:pointer;border-radius:999px;align-items:center;gap:.35rem;padding:.3rem .6rem;font-size:.78rem;display:flex;position:absolute;transform:translate(-50%,-50%)}.hotspot-marker .hotspot-index{background:var(--accent);width:1.4rem;height:1.4rem;color:var(--accent-ink);font-family:var(--font-mono),monospace;border-radius:50%;place-items:center;font-size:.7rem;display:grid}.hotspot-marker.is-viewed .hotspot-index{background:var(--ok)}.hotspot-marker.is-active{border-color:var(--accent)}.hotspot-detail{background:var(--surface);border:1px solid 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(max-width:900px){.ros-land-promise--banner{padding:20px}.ros-land-promise--banner .ros-land-promise-plate{width:82%;padding:20px}.ros-land-day-layout{grid-template-columns:1fr}}@media (max-width:767px){.ros-land-promise-timer{text-align:center;color:#e87040;letter-spacing:.06em;background:#14130f;width:auto;padding:6px 10px;font-size:20px;display:block;position:static}.ros-land-promise--banner{min-height:0;padding:0;display:block}.ros-land-promise--banner .ros-land-promise-plate{width:auto;margin-top:0;margin-left:0;padding:20px 16px}.ros-land-promise-lead{grid-template-columns:1fr;gap:10px}.ros-land-promise-duration{font-size:56px}.ros-land-day-layout{grid-template-columns:1fr}.ros-land-iconnav{flex-direction:column;gap:2px;width:auto;height:auto}.ros-land-iconnav:focus-visible .ros-land-navtile,.ros-land-iconnav:hover .ros-land-navtile{transform:none}.ros-land-navlabel{color:var(--dim);opacity:1;background:0 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--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-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}