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.v2-sheet-title{letter-spacing:-.01em;margin:0;font-size:1.125rem;font-weight:800}html[data-ui=v2] .v2-sheet-close{background:var(--v2-surface);min-width:44px;min-height:44px;color:var(--v2-ink);font:inherit;cursor:pointer;border:0;border-radius:12px}html[data-ui=v2] .v2-sheet-close:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}@media (min-width:768px){html[data-ui=v2] .v2-sheet{max-width:560px;margin:auto}html[data-ui=v2] .v2-sheet-body{border-radius:24px}}html[data-ui=v2] .v2-seg{background:var(--v2-bg);min-width:0;box-shadow:inset 0 0 0 1.5px var(--v2-line);border:0;border-radius:12px;margin:0;padding:3px;display:inline-flex}html[data-ui=v2] .v2-seg-item{min-height:44px;color:var(--v2-muted);font:inherit;font-size:var(--type-md);cursor:pointer;background:0 0;border-radius:9px;align-items:center;padding:0 .875rem;font-weight:700;display:inline-flex}html[data-ui=v2] .v2-seg-input{opacity:0;pointer-events:none;width:1px;height:1px;position:absolute}html[data-ui=v2] 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var(--ease-quiet), box-shadow .25s var(--ease-quiet);border-radius:16px;align-items:center;gap:.75rem;padding:.5rem .875rem;text-decoration:none;display:flex}html[data-ui=v2] .v2-row:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}html[data-ui=v2] .v2-row:active{box-shadow:0 0 0 var(--v2-line);transition-duration:.1s;transform:translateY(2px)}html[data-ui=v2] .v2-row-text{font-size:var(--type-md);flex:1;font-weight:700;display:grid}html[data-ui=v2] .v2-row-title{font-weight:700}html[data-ui=v2] .v2-row-sub{color:var(--v2-muted);font-size:var(--type-sm);font-weight:600}html[data-ui=v2] .v2-row-count{color:var(--v2-ink);font-weight:800}html[data-ui=v2] .v2-row-chevron{color:var(--v2-muted)}html[data-ui=v2] .v2-section-title{font-size:var(--type-sm);color:var(--v2-muted);margin:.25rem .25rem 0;font-weight:800}html[data-ui=v2] .v2-courses{gap:.5rem;display:grid}html[data-ui=v2] .v2-course-list{gap:.5rem;margin:0;padding:0;list-style:none;display:grid}html[data-ui=v2] .v2-new-course{min-height:44px;color:var(--v2-ink);text-underline-offset:3px;justify-self:center;align-items:center;padding:0 .75rem;font-weight:700;text-decoration:underline;display:inline-flex}html[data-ui=v2] .v2-new-course:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}html[data-ui=v2] .v2-home-more{gap:.75rem;display:grid}html[data-ui=v2] .v2-home-more:not(:has(>.v2-legacy:not(:empty))){display:none}html[data-ui=v2] .v2-legacy{color:#1f2430;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;box-shadow:0 2px 0 var(--v2-line);background:#fff;border-radius:20px;padding:1rem}html[data-ui=v2] .v2-legacy:empty{display:none}html[data-ui=v2] .v2-legacy>:first-child{margin-block-start:0}html[data-ui=v2] .v2-legacy>.desk-card{box-shadow:none;background:0 0;border:0;padding:0}html[data-ui=v2] .v2-legacy .desk-card:hover{transform:none}html[data-ui=v2] .v2-legacy-title{font-size:var(--type-lg);margin:0;font-weight:800}html[data-ui=v2] .v2-legacy-meta{font-size:var(--type-sm);margin:.125rem 0 .5rem}html[data-ui=v2] .v2-legacy .bg-brass,html[data-ui=v2] .v2-legacy .bg-brass:hover,html[data-ui=v2] .v2-legacy .bg-brass:disabled,html[data-ui=v2] .v2-legacy button.bg-white\/70,html[data-ui=v2] .v2-legacy button.bg-white\/70:hover,html[data-ui=v2] .v2-legacy button.bg-white\/70:disabled,html[data-ui=v2] .v2-legacy .showcase-control-button:not(.is-quiet),html[data-ui=v2] .v2-legacy .showcase-control-button:not(.is-quiet):hover,html[data-ui=v2] .v2-legacy .course-diagnostic-panel button,html[data-ui=v2] .v2-legacy .course-diagnostic-panel button:hover{color:#1f2430;background:#fff;border:2px solid #948a76;min-height:44px}html[data-ui=v2] .v2-legacy .bg-brass:focus-visible,html[data-ui=v2] .v2-legacy button.bg-white\/70:focus-visible,html[data-ui=v2] .v2-legacy .showcase-control-button:not(.is-quiet):focus-visible{outline-offset:2px;outline:3px solid #1f2430}html[data-ui=v2] .v2-legacy .course-diagnostic-panel button:focus-visible{outline-offset:2px;outline:3px solid #faf6ef}@media (min-width:1024px){html[data-ui=v2] .v2-home{grid-template-columns:minmax(0,1fr) 320px;align-items:start;column-gap:1.5rem;max-width:960px}html[data-ui=v2] .v2-home-top{grid-area:1/1/auto/-1}html[data-ui=v2] .v2-home>.v2-continue,html[data-ui=v2] .v2-home>.v2-home-empty{grid-area:2/1/span 2}html[data-ui=v2] .v2-home>.v2-week{grid-area:2/2}html[data-ui=v2] .v2-home>.v2-row-reviews{grid-area:3/2}html[data-ui=v2] .v2-home>.v2-courses{grid-area:4/1}html[data-ui=v2] .v2-home>.v2-home-more{grid-area:5/1}}html[data-ui=v2] .v2-unit{gap:.5rem;display:grid}html[data-ui=v2] .v2-unit-head{background:var(--v2-unit-1);color:var(--v2-on-unit);box-shadow:0 4px 0 var(--v2-unit-1-deep);border-radius:18px;gap:.125rem;margin:0;padding:.625rem 1rem;display:grid}html[data-ui=v2] .v2-unit[data-tone="2"] .v2-unit-head{background:var(--v2-unit-2);box-shadow:0 4px 0 var(--v2-unit-2-deep)}html[data-ui=v2] .v2-unit[data-tone="3"] .v2-unit-head{background:var(--v2-unit-3);box-shadow:0 4px 0 var(--v2-unit-3-deep)}html[data-ui=v2] .v2-unit[data-tone=locked] .v2-unit-head{background:var(--v2-locked);color:var(--v2-locked-ink);box-shadow:0 4px 0 var(--v2-locked-deep), inset 0 0 0 1.5px var(--v2-locked-edge)}html[data-ui=v2] .v2-unit[data-tone=final] .v2-unit-head{background:var(--v2-surface);color:var(--v2-ink);box-shadow:0 2px 0 var(--v2-line), inset 0 0 0 1.5px var(--v2-line-strong)}html[data-ui=v2] .v2-unit-kicker{font-size:var(--type-sm);font-weight:600}html[data-ui=v2] .v2-unit-title{letter-spacing:-.01em;overflow-wrap:anywhere;font-size:1.125rem;font-weight:800;line-height:1.3}html[data-ui=v2] .v2-path{--lane-step:clamp(14px, 6vw, 28px);justify-items:center;gap:.875rem;margin:0;padding:.75rem 0 1rem;list-style:none;display:grid}html[data-ui=v2] .v2-path-item{justify-items:center;gap:.5rem;inline-size:100%;display:grid}html[data-ui=v2] .v2-station-wrap{max-inline-size:calc(100% - 4 * var(--lane-step));transform:translateX(calc(var(--lane,0) * var(--lane-step)));justify-items:center;display:grid;position:relative}html[data-ui=v2] .v2-station{min-width:44px;min-height:44px;color:var(--v2-ink);font:inherit;cursor:pointer;background:0 0;border:0;justify-items:center;gap:.25rem;padding:0;text-decoration:none;display:grid}html[data-ui=v2] .v2-station:focus-visible{outline:3px solid var(--v2-ink);outline-offset:4px;border-radius:16px}html[data-ui=v2] .v2-station-node{background:var(--v2-surface);block-size:56px;inline-size:60px;color:var(--v2-ink);box-shadow:inset 0 0 0 2px var(--v2-line-strong), 0 5px 0 var(--v2-line-strong);transition:transform .25s var(--ease-quiet), box-shadow .25s var(--ease-quiet);border-radius:50%;place-items:center;font-size:1.25rem;font-weight:800;display:grid}html[data-ui=v2] .v2-station[data-kind=quiz] .v2-station-node{block-size:44px;inline-size:44px;font-size:1rem}html[data-ui=v2] .v2-station[data-kind=gate] .v2-station-node,html[data-ui=v2] .v2-station[data-kind=final] .v2-station-node{border-radius:18px;block-size:60px;inline-size:64px}html[data-ui=v2] .v2-station:active .v2-station-node{box-shadow:inset 0 0 0 2px var(--v2-line-strong), 0 1px 0 var(--v2-line-strong);transition-duration:.1s;transform:translateY(4px)}html[data-ui=v2] .v2-station[data-state=done] .v2-station-node{background:var(--v2-success);color:var(--v2-on-success);box-shadow:0 5px 0 var(--v2-success-deep)}html[data-ui=v2] .v2-station[data-state=active] .v2-station-node{background:var(--v2-accent);color:var(--v2-on-accent);box-shadow:0 5px 0 var(--v2-accent-deep), 0 0 0 7px color-mix(in srgb, var(--v2-accent) 30%, transparent)}html[data-ui=v2] .v2-station[data-state=locked-payment] .v2-station-node,html[data-ui=v2] .v2-station[data-state=locked-progress] .v2-station-node{background:var(--v2-locked);color:var(--v2-locked-ink);font-size:1rem}html[data-ui=v2] .v2-station[data-state=locked-payment] .v2-station-node{box-shadow:inset 0 0 0 2px var(--v2-locked-edge), 0 5px 0 var(--v2-locked-deep)}html[data-ui=v2] .v2-station[data-state=not-built] .v2-station-node{background:var(--v2-locked);color:var(--v2-locked-ink);box-shadow:none;border:2px dashed var(--v2-locked-edge)}html[data-ui=v2] .v2-station[data-state=locked-progress] .v2-station-node{border:2px dotted var(--v2-locked-edge);box-shadow:0 5px 0 var(--v2-locked-deep)}html[data-ui=v2] .v2-station[data-state=quality-failed] .v2-station-node{background:var(--v2-surface);color:var(--v2-muted);box-shadow:none;border:2px dashed var(--v2-line-strong)}html[data-ui=v2] .v2-station-label{max-inline-size:min(14rem,100%);font-size:var(--type-sm);text-align:center;overflow-wrap:anywhere;font-weight:700;line-height:1.3}html[data-ui=v2] .v2-station[data-state=locked-payment] .v2-station-label,html[data-ui=v2] .v2-station[data-state=locked-progress] .v2-station-label,html[data-ui=v2] .v2-station[data-state=not-built] .v2-station-label{color:var(--v2-muted)}html[data-ui=v2] .v2-station-bubble{background:var(--v2-ink);max-inline-size:min(16rem,100%);color:var(--v2-bg);font-size:var(--type-sm);text-align:center;overflow-wrap:anywhere;border-radius:12px;margin-block-start:.25rem;padding:.5rem .75rem;font-weight:700;display:block}html[data-ui=v2] .v2-station-skeleton{background:var(--v2-locked);block-size:56px;inline-size:60px;box-shadow:inset 0 0 0 2px var(--v2-locked-edge);transform:translateX(calc(var(--lane,0) * var(--lane-step,28px)));border-radius:50%}html[data-ui=v2] .v2-active-bubble{background:var(--v2-surface);inline-size:min(100%,20rem);box-shadow:0 2px 0 var(--v2-line), inset 0 0 0 1.5px var(--v2-line-strong);border-radius:18px;gap:.5rem;padding:.75rem;display:grid}html[data-ui=v2] .v2-active-kicker{font-size:var(--type-sm);text-align:center;overflow-wrap:anywhere;margin:0;font-weight:700}html[data-ui=v2] .v2-active-cta{inline-size:100%}@media (forced-colors:active){html[data-ui=v2] .v2-station-node{border:2px solid canvastext}html[data-ui=v2] .v2-station[data-state=active] .v2-station-node{outline-offset:3px;outline:3px solid highlight}html[data-ui=v2] .v2-station-bubble,html[data-ui=v2] .v2-active-bubble,html[data-ui=v2] .v2-unit-head{border:1px solid canvastext}}html[data-ui=v2] .v2-info-btn{background:var(--v2-surface);min-width:44px;min-height:44px;color:var(--v2-ink);font:inherit;box-shadow:inset 0 0 0 2px var(--v2-line-strong);cursor:pointer;border:0;border-radius:50%;place-items:center;font-size:1.125rem;font-weight:800;display:inline-grid}html[data-ui=v2] .v2-info-btn:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}html[data-ui=v2] .v2-info{gap:.875rem;display:grid}html[data-ui=v2] .v2-info-section{gap:.25rem;display:grid}html[data-ui=v2] .v2-info-title{font-size:var(--type-lg);margin:0;font-weight:800}html[data-ui=v2] .v2-info-subtitle{font-size:var(--type-md);margin:.5rem 0 0;font-weight:800}html[data-ui=v2] .v2-info-goal{font-family:var(--v2-font-read);margin:0;font-size:1.0625rem;line-height:1.55}html[data-ui=v2] .v2-info-meta{color:var(--v2-muted);font-size:var(--type-sm);margin:0}html[data-ui=v2] .v2-info-note{background:var(--v2-surface);color:var(--v2-ink);box-shadow:inset 0 0 0 1.5px var(--v2-line-strong);font-size:var(--type-sm);border-radius:14px;margin:0;padding:.75rem 1rem}html[data-ui=v2] .v2-info-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem;margin:0;display:grid}html[data-ui=v2] .v2-info-stats>div{background:var(--v2-surface);box-shadow:0 2px 0 var(--v2-line);border-radius:12px;padding:.5rem .75rem}html[data-ui=v2] .v2-info-stats dt{color:var(--v2-muted);font-size:var(--type-2xs);font-weight:700}html[data-ui=v2] .v2-info-stats dd{margin:0;font-weight:800}html[data-ui=v2] .v2-info-links{gap:.5rem;display:grid}html[data-ui=v2] .v2-info-list{gap:.25rem;margin:.25rem 0 0;padding-inline-start:1.25rem;display:grid}html[data-ui=v2] .v2-info-details{background:var(--v2-surface);box-shadow:0 2px 0 var(--v2-line);border-radius:14px;padding:0 1rem}html[data-ui=v2] .v2-info-details[open]{padding-block-end:.875rem}html[data-ui=v2] .v2-info-details>summary{cursor:pointer;align-items:center;gap:.5rem;min-height:48px;font-weight:800;list-style:none;display:flex}html[data-ui=v2] .v2-info-details>summary::-webkit-details-marker{display:none}html[data-ui=v2] .v2-info-summary-title{font-size:inherit;font-weight:inherit;margin:0}html[data-ui=v2] .v2-info-chevron{flex-shrink:0;place-items:center;block-size:1em;inline-size:1em;margin-inline-start:auto;line-height:1;transition:transform .15s;display:inline-grid;overflow:clip}html[data-ui=v2] .v2-info-details:not([open])>summary>.v2-info-chevron{transform:rotate(90deg)}html[data-ui=v2][dir=ltr] .v2-info-details:not([open])>summary>.v2-info-chevron{transform:rotate(-90deg)}html[data-ui=v2] .v2-info-details>summary:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px;border-radius:10px}html[data-ui=v2] .v2-info-link{color:var(--v2-ink);text-underline-offset:3px;font-weight:700;text-decoration:underline}html[data-ui=v2] .v2-info-link:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}@media (forced-colors:active){html[data-ui=v2] .v2-info-btn,html[data-ui=v2] .v2-info-details,html[data-ui=v2] .v2-info-stats>div{border:1px solid canvastext}}html[data-ui=v2] .v2-map{gap:.875rem;max-width:600px;margin:0 auto;padding:1rem 1rem 1.5rem;display:grid}html[data-ui=v2] .v2-map-top{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem;display:flex}html[data-ui=v2] .v2-map-name{flex:12rem;align-items:center;gap:.25rem;min-width:0;display:flex}html[data-ui=v2] .v2-map-title{letter-spacing:-.01em;overflow-wrap:anywhere;margin:0;font-size:1.25rem;font-weight:800}html[data-ui=v2] .v2-map-tools{flex-shrink:0;align-items:center;gap:.5rem;display:flex}html[data-ui=v2] .v2-map-upgrade .nav-upgrade-link{background:var(--v2-surface);min-height:44px;color:var(--v2-ink);box-shadow:inset 0 0 0 2px var(--v2-line-strong);font-size:var(--type-sm);border-radius:12px;align-items:center;padding:0 .75rem;font-weight:800;text-decoration:none;display:inline-flex}html[data-ui=v2] .v2-map-upgrade .nav-upgrade-link:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}html[data-ui=v2] .v2-picker{position:relative}html[data-ui=v2] .v2-picker-summary{cursor:pointer;border-radius:12px;place-items:center;min-width:44px;min-height:44px;list-style:none;display:grid}html[data-ui=v2] .v2-picker-summary::-webkit-details-marker{display:none}html[data-ui=v2] .v2-picker-summary:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}html[data-ui=v2] .v2-picker-list{z-index:30;inset-inline-start:0;background:var(--v2-surface);min-inline-size:14rem;box-shadow:0 8px 24px #0000002e, inset 0 0 0 1.5px var(--v2-line-strong);border-radius:14px;margin:0;padding:.375rem;list-style:none;position:absolute;top:calc(100% + .25rem)}html[data-ui=v2] .v2-picker-link{min-height:44px;color:var(--v2-ink);border-radius:10px;align-items:center;padding:0 .75rem;font-weight:700;text-decoration:none;display:flex}html[data-ui=v2] .v2-picker-link:focus-visible{outline:3px solid var(--v2-ink);outline-offset:-3px}html[data-ui=v2] .v2-map-banner{background:var(--v2-surface);box-shadow:0 2px 0 var(--v2-line), inset 0 0 0 1.5px var(--v2-accent-deep);border-radius:18px;gap:.25rem;padding:1rem;display:grid}html[data-ui=v2] .v2-map-banner .v2-info-link{justify-self:start;align-items:center;min-height:44px;display:inline-flex}html[data-ui=v2] .v2-map-path,html[data-ui=v2] .v2-map-locked{gap:1rem;display:grid}html[data-ui=v2] .v2-map-empty{text-align:center;color:var(--v2-muted);margin:2rem 0}html[data-ui=v2] .v2-offer{--v2-offer-bottom:calc(56px + env(safe-area-inset-bottom) + .75rem);z-index:5;bottom:var(--v2-offer-bottom);background:var(--v2-surface);box-shadow:0 2px 0 var(--v2-line), 0 10px 24px #0000001f, inset 0 0 0 1.5px var(--v2-line-strong);border-radius:18px;align-items:center;gap:.75rem;padding:.75rem;display:flex;position:sticky}html[data-ui=v2] .v2-offer-text{flex:1;min-width:0}html[data-ui=v2] .v2-offer-title{overflow-wrap:anywhere;margin:0;font-weight:800}html[data-ui=v2] .v2-offer-meta{color:var(--v2-muted);font-size:var(--type-sm);margin:.125rem 0 0}html[data-ui=v2] .v2-offer-cta{flex-shrink:0}@media (min-width:768px){html[data-ui=v2] .v2-offer{--v2-offer-bottom:1rem}}@media (forced-colors:active){html[data-ui=v2] .v2-offer,html[data-ui=v2] .v2-picker-list,html[data-ui=v2] .v2-map-banner,html[data-ui=v2] .v2-map-upgrade .nav-upgrade-link{border:1px solid canvastext}}html[data-ui=v2] .v2-unlock,html[data-ui=v2] .v2-unlock[data-playing=true]>.v2-map-path{position:relative}html[data-ui=v2] .v2-unlock[data-playing=true]>.v2-map-path:after{content:"";background:var(--v2-bg);mix-blend-mode:saturation;pointer-events:none;animation:1.6s ease-out forwards v2-color-flow;position:absolute;inset:0}@keyframes v2-color-flow{0%{clip-path:inset(0)}to{clip-path:inset(100% 0 0)}}html[data-ui=v2] .v2-confetti{z-index:45;pointer-events:none;position:fixed;inset:0;overflow:hidden}html[data-ui=v2] .v2-confetti i{border-radius:2px;width:8px;height:14px;animation:2.2s ease-in forwards v2-confetti-fall;position:absolute;top:-16px}@keyframes v2-confetti-fall{to{opacity:.2;transform:translateY(105vh)}}html[data-ui=v2] .v2-toast-live{z-index:46;pointer-events:none;max-width:420px;margin:0 auto;position:fixed;inset-inline:1rem}html[data-ui=v2] .v2-toast{pointer-events:none;background:var(--v2-ink);color:var(--v2-bg);text-align:center;border-radius:16px;gap:.125rem;padding:.75rem 1rem;display:grid;box-shadow:0 10px 24px #0003}html[data-ui=v2] .v2-toast strong{font-size:var(--type-md);font-weight:800}html[data-ui=v2] .v2-toast small{font-size:var(--type-sm);font-weight:600}@media (min-width:768px){html[data-ui=v2] .v2-toast-live{inset-inline-start:calc(var(--v2-rail) + 1rem)}}html[data-ui=v2] .v2-paper{background:var(--v2-surface);min-inline-size:0;color:var(--v2-ink);box-shadow:0 2px 0 var(--v2-line);font-family:var(--v2-font-read);overflow-wrap:anywhere;border-radius:20px;gap:.5rem;padding:1.25rem 1.125rem;font-size:1.0625rem;line-height:1.65;display:grid}html[data-ui=v2] .v2-paper-kicker{font-family:var(--v2-font-ui);font-size:var(--type-sm);color:var(--v2-muted);margin:0;font-weight:700}html[data-ui=v2] .v2-paper-topic{font-family:var(--v2-font-ui);color:var(--v2-ink);margin:0;font-size:1.375rem;font-weight:800;line-height:1.3}html[data-ui=v2] .v2-paper-body{min-inline-size:0}html[data-ui=v2] .v2-paper table{overflow-wrap:normal}html[data-ui=v2] .v2-paper span.block.font-mono[dir=ltr]{overflow-wrap:normal;white-space:nowrap;background-image:linear-gradient(to right, var(--v2-formula-cover,var(--v2-surface)) 30%, transparent), linear-gradient(to left, var(--v2-formula-cover,var(--v2-surface)) 30%, transparent), linear-gradient(to right, color-mix(in srgb, var(--v2-ink) 25%, transparent), transparent), linear-gradient(to left, color-mix(in srgb, var(--v2-ink) 25%, transparent), transparent);background-position:0,100%,0,100%;background-repeat:no-repeat;background-size:1.5rem 100%,1.5rem 100%,.75rem 100%,.75rem 100%;background-attachment:local,local,scroll,scroll;overflow:auto hidden}html[data-ui=v2] .v2-paper .lesson-callout{--v2-formula-cover:color-mix(in srgb, var(--color-brass) 9%, var(--v2-surface))}html[data-ui=v2] .v2-paper tbody tr:nth-child(odd){--v2-formula-cover:var(--color-parchment)}html[data-ui=v2] .v2-paper tbody tr:nth-child(2n){--v2-formula-cover:color-mix(in srgb, var(--color-white) 60%, var(--v2-surface))}@media (forced-colors:active){html[data-ui=v2] .v2-paper{border:1px solid canvastext}}html[data-ui=v2] .v2-open{gap:.875rem;display:grid}html[data-ui=v2] .v2-open-banner{box-shadow:inset 0 0 0 1.5px var(--v2-line-strong);border:0;border-radius:14px;margin:0}html[data-ui=v2] .v2-open-kicker{color:var(--v2-muted);font-size:var(--type-sm);margin:0;font-weight:700}html[data-ui=v2] .v2-open-badge{background:var(--v2-surface);color:var(--v2-ink);box-shadow:inset 0 0 0 1.5px var(--v2-line-strong);font-size:var(--type-sm);border-radius:999px;justify-self:start;margin:0;padding:.25rem .625rem;font-weight:700}html[data-ui=v2] .v2-open-title{letter-spacing:-.01em;overflow-wrap:anywhere;margin:0;font-size:1.75rem;font-weight:800;line-height:1.2}html[data-ui=v2] .v2-open-week{color:var(--v2-muted);overflow-wrap:anywhere;margin:0}html[data-ui=v2] .v2-open-meta{flex-wrap:wrap;gap:.5rem;margin:0;padding:0;list-style:none;display:flex}html[data-ui=v2] .v2-open-meta>li{background:var(--v2-surface);color:var(--v2-ink);box-shadow:inset 0 0 0 1.5px var(--v2-line-strong);font-size:var(--type-sm);border-radius:999px;padding:.25rem .625rem;font-weight:700}html[data-ui=v2] .v2-open-section{background:var(--v2-surface);box-shadow:0 2px 0 var(--v2-line);border-radius:20px;gap:.25rem;padding:1rem;display:grid}html[data-ui=v2] .v2-open-section>h2{font-size:var(--type-lg);margin:0;font-weight:800}html[data-ui=v2] .v2-open-section>p{font-family:var(--v2-font-read);overflow-wrap:anywhere;margin:0;font-size:1.0625rem;line-height:1.6}html[data-ui=v2] .v2-open-concepts{gap:.5rem;margin:0;display:grid}html[data-ui=v2] .v2-open-concepts dt{overflow-wrap:anywhere;font-weight:800}html[data-ui=v2] .v2-open-concepts dd{color:var(--v2-muted);font-size:var(--type-sm);overflow-wrap:anywhere;margin:0}html[data-ui=v2] .v2-open-ai{color:var(--v2-muted);font-size:var(--type-sm);margin:0}html[data-ui=v2] .v2-pq{background:var(--v2-surface);color:var(--v2-ink);box-shadow:0 2px 0 var(--v2-line);border-radius:20px;gap:.75rem;padding:1.25rem 1rem;display:grid}html[data-ui=v2] .v2-pq-kicker{color:var(--v2-muted);font-size:var(--type-sm);margin:0;font-weight:700}html[data-ui=v2] .v2-pq-question{overflow-wrap:anywhere;margin:0;font-size:1.25rem;font-weight:800;line-height:1.35}html[data-ui=v2] .v2-pq-hint{color:var(--v2-muted);font-size:var(--type-sm);margin:0}html[data-ui=v2] .v2-pq-options{border:0;gap:.5rem;min-inline-size:0;margin:0;padding:0;display:grid}html[data-ui=v2] .v2-choice{background:var(--v2-surface);min-block-size:48px;color:var(--v2-ink);box-shadow:inset 0 0 0 2px var(--v2-line-strong), 0 3px 0 var(--v2-line-strong);font:inherit;text-align:start;overflow-wrap:anywhere;cursor:pointer;transition:transform .25s var(--ease-quiet), box-shadow .25s var(--ease-quiet);border:0;border-radius:14px;align-items:center;padding:.625rem .875rem;font-weight:700;display:flex}html[data-ui=v2] .v2-choice:active{box-shadow:inset 0 0 0 2px var(--v2-line-strong);transition-duration:.1s;transform:translateY(3px)}html[data-ui=v2] .v2-choice:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}html[data-ui=v2] .v2-pq-answered{gap:.5rem;display:grid}html[data-ui=v2] .v2-pq-chosen{overflow-wrap:anywhere;margin:0}html[data-ui=v2] .v2-pq-why{background:var(--v2-bg);color:var(--v2-ink);font-family:var(--v2-font-read);overflow-wrap:anywhere;border-radius:12px;margin:0;padding:.75rem;line-height:1.6}@media (forced-colors:active){html[data-ui=v2] .v2-open-section,html[data-ui=v2] .v2-open-meta>li,html[data-ui=v2] .v2-pq,html[data-ui=v2] .v2-choice{border:1px solid canvastext}}html[data-ui=v2] .v2-lesson{background:var(--v2-bg);min-block-size:100dvh;color:var(--v2-ink);flex-direction:column;display:flex}html[data-ui=v2] .v2-lesson [hidden]{display:none!important}html[data-ui=v2] .v2-lesson-top{z-index:20;background:var(--v2-bg);border-block-end:1.5px solid var(--v2-line);align-items:center;gap:.75rem;padding:.5rem max(1rem,50% - 340px);display:flex;position:sticky;inset-block-start:0}html[data-ui=v2] .v2-lesson-close{min-block-size:44px;min-inline-size:44px;color:var(--v2-ink);border-radius:12px;flex-shrink:0;place-items:center;font-size:1.25rem;font-weight:800;text-decoration:none;display:inline-grid}html[data-ui=v2] .v2-lesson-close:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}html[data-ui=v2] .v2-lesson-progress{background:var(--v2-surface);block-size:12px;min-inline-size:0;box-shadow:inset 0 0 0 1.5px var(--v2-line-strong);border-radius:6px;flex:1;overflow:hidden}html[data-ui=v2] .v2-lesson-progress-fill{background:var(--v2-progress);block-size:100%;transition:inline-size .3s var(--ease-quiet);border-radius:6px;display:block}html[data-ui=v2] .v2-lesson-stage{touch-action:pan-y pinch-zoom;flex:1;inline-size:100%;max-inline-size:680px;margin-inline:auto;padding:1rem 1rem calc(56px + 1.5rem);overflow-x:clip}html[data-ui=v2] .v2-lesson[data-zoomed] .v2-lesson-stage{touch-action:auto}html[data-ui=v2] .v2-lesson-card{gap:.875rem;display:grid}html[data-ui=v2] .v2-lesson-card>*{min-inline-size:0}html[data-ui=v2] .v2-lesson-card:focus{outline:none}html[data-ui=v2] .v2-lesson-card[data-enter]{animation:v2-card-in .22s var(--ease-quiet) both}html[data-ui=v2] .v2-lesson-card[data-enter=forward]{--v2-enter-x:2rem}html[data-ui=v2] .v2-lesson-card[data-enter=back],html[data-ui=v2][dir=rtl] .v2-lesson-card[data-enter=forward]{--v2-enter-x:-2rem}html[data-ui=v2][dir=rtl] .v2-lesson-card[data-enter=back]{--v2-enter-x:2rem}@keyframes v2-card-in{0%{opacity:0;transform:translateX(var(--v2-enter-x,0))}to{opacity:1;transform:none}}html[data-ui=v2] .v2-lesson-gate-hint{color:var(--v2-muted);font-size:var(--type-sm);text-align:center;margin:0}html[data-ui=v2] .v2-lesson-foot{z-index:20;box-sizing:border-box;min-block-size:var(--v2-lesson-foot-h,4.5rem);padding:.75rem max(1rem, calc((100% - 680px) / 2)) calc(.75rem + env(safe-area-inset-bottom));background:var(--v2-bg);border-block-start:1.5px solid var(--v2-line);position:sticky;inset-block-end:var(--cookie-notice-h,0px)}html[data-ui=v2] .v2-lesson-foot-row{gap:.75rem;display:flex}html[data-ui=v2] .v2-lesson-continue{flex:1}html[data-ui=v2] .v2-lesson-back{flex-shrink:0}html[data-ui=v2] .v2-done-hero{text-align:center;justify-items:center;gap:.375rem;padding-block:.75rem .25rem;display:grid}html[data-ui=v2] .v2-done-title{letter-spacing:-.01em;margin:0;font-size:1.75rem;font-weight:800;line-height:1.2}html[data-ui=v2] .v2-done-sub{min-block-size:1.6em;color:var(--v2-muted);font-family:var(--v2-font-read);margin:0;font-size:1.0625rem;line-height:1.6}html[data-ui=v2] .v2-lesson #lesson-summary{gap:.875rem}html[data-ui=v2] .v2-done-body{gap:.875rem;display:grid}html[data-ui=v2] .v2-done-links{flex-wrap:wrap;justify-content:center;gap:.25rem 1rem;margin:0;display:flex}html[data-ui=v2] .v2-done-link{min-block-size:44px;color:var(--v2-ink);text-underline-offset:3px;overflow-wrap:anywhere;align-items:center;font-weight:700;text-decoration:underline;display:inline-flex}html[data-ui=v2] .v2-done-link:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}html[data-ui=v2] .v2-done-more-body{gap:.75rem;display:grid}@media (forced-colors:active){html[data-ui=v2] .v2-lesson-progress{border:1px solid canvastext}html[data-ui=v2] .v2-lesson-progress-fill{background:highlight}html[data-ui=v2] .v2-lesson-top,html[data-ui=v2] .v2-lesson-foot{border-color:canvastext}}html[data-ui=v2] .v2-open>*{min-inline-size:0}html[data-ui=v2] .v2-pq-response{min-inline-size:0;display:grid}html[data-ui=v2] .v2-pq-status{min-inline-size:0}html[data-ui=v2]:has(.v2-lesson){--v2-rail:0px;--v2-lesson-foot-h:calc(48px + 1.5rem + 1.5px);--v2-lesson-float-bottom:calc(var(--v2-lesson-foot-measured,calc(var(--v2-lesson-foot-h) + env(safe-area-inset-bottom))) + var(--cookie-notice-h,0px) + .75rem)}html[data-ui=v2]:has(.v2-lesson) .v2-nav{display:none}html[data-ui=v2]:has(.v2-lesson) .v2-main{padding-bottom:0}html[data-ui=v2] .v2-lesson-foot-row{flex-wrap:wrap}html[data-ui=v2] .v2-ask-panel{z-index:61;max-block-size:calc(100dvh - var(--v2-lesson-float-bottom,calc(1rem + var(--cookie-notice-h,0px))) - 1rem);overscroll-behavior:contain;position:fixed;inset-block-end:var(--v2-lesson-float-bottom,calc(1rem + var(--cookie-notice-h,0px)));inset-inline-start:1rem;overflow-y:auto}html[data-ui=v2] .v2-lesson .v2-paper,html[data-ui=v2] .v2-sheet .v2-paper,html[data-ui=v2] .v2-ask-panel{--color-ink:var(--v2-read-ink,#0b1120);--color-ink-raised:var(--v2-read-ink,#111a2e);--color-ink-soft:var(--v2-read-ink,#1a2438);--color-scribe:var(--v2-read-body,#2a2e3a);--color-quill-deep:var(--v2-read-body,#39453f);--color-ink-muted-deep:var(--v2-read-muted,#4a5468);--color-ink-muted:var(--v2-read-muted,#636a77);--color-quill:var(--v2-read-muted,#62665f);--color-white:var(--v2-read-surface,#fff);--color-parchment-bright:var(--v2-read-surface,#fffdf7);--color-parchment:var(--v2-read-raised,#faf6ef);--color-parchment-soft:var(--v2-read-raised,#f5efe3);--color-parchment-deep:var(--v2-read-raised,#f2ecdf);--color-brass:var(--v2-read-brass,#d9a441);--color-brass-bright:var(--v2-read-brass,#e8b95a);--color-brass-soft:var(--v2-read-brass,#f0c56b);--color-brass-deep:var(--v2-read-accent,#88651d);--color-sage:var(--v2-read-sage,#5f8575);--color-sage-deep:var(--v2-read-success,#466256);--color-ember:var(--v2-read-danger,#c4553b);--color-ember-deep:var(--v2-read-danger,#98422d);--color-rust:var(--v2-read-rust,#9d5b3f);--color-rust-deep:var(--v2-read-rust,#754530);--color-board:var(--v2-read-figure,#285e50)}html[data-ui=v2] .v2-lesson pre.bg-ink{background-color:var(--v2-read-code-bg,#0b1120);color:var(--v2-read-code-ink,#faf6ef);box-shadow:inset 0 0 0 1px var(--v2-read-code-edge,transparent)}html[data-ui=v2] .v2-lesson .lesson-structured-visual{background:var(--v2-read-figure-tint,#e1ece494);border-color:var(--v2-read-figure-edge,#3363572e)}html[data-ui=v2] .v2-lesson .lesson-glossary-speak{background:var(--v2-read-surface,white)}html[data-ui=v2] .v2-lesson .lesson-glossary-speak:hover{background:color-mix(in srgb, var(--color-brass) 22%, var(--v2-read-surface,white))}html[data-ui=v2] .v2-lesson .lesson-feedback-panel{background:color-mix(in srgb, var(--v2-read-surface,white) 60%, var(--color-parchment))}html[data-ui=v2] .v2-lesson .lesson-feedback-chip{background:var(--v2-read-surface,white)}html[data-ui=v2] .v2-lesson .lesson-feedback-chip.is-selected{background:color-mix(in srgb, var(--color-brass) 16%, var(--v2-read-surface,white))}html[data-ui=v2] .v2-lesson .lesson-feedback-comment{background:var(--v2-read-surface,white)}html[data-ui=v2] .v2-lesson .lesson-time-tracker{background:color-mix(in srgb, var(--v2-read-surface,white) 70%, var(--color-parchment))}html[data-ui=v2] .v2-lesson .flip-face-front{background:var(--v2-read-surface,white)}html[data-ui=v2] .v2-lesson .flip-face-back{background:color-mix(in srgb, var(--color-sage) 12%, var(--v2-read-surface,white))}html[data-ui=v2] .v2-ask-panel .text-red-700{color:var(--v2-read-danger,#bf000f)}@supports (color:lab(0% 0 0)){html[data-ui=v2] .v2-ask-panel .text-red-700{color:var(--v2-read-danger,lab(40.4273% 67.2623 53.7441))}}html[data-ui=v2] .a11y-root{--color-ink:var(--v2-ink);--color-scribe:var(--v2-muted);--color-parchment:var(--v2-bg);--color-parchment-bright:var(--v2-surface);--color-line:var(--v2-line-strong);--color-brass:var(--v2-accent);--color-brass-deep:var(--v2-accent-deep);--color-brass-bright:var(--v2-ink);--color-sage-deep:var(--v2-success-deep);flex-direction:column-reverse;gap:8px;inset-block-start:calc(env(safe-area-inset-top) + 8px);inset-block-end:auto;inset-inline-end:8px}html[data-ui=v2] .a11y-button{background:var(--v2-surface);width:44px;height:44px;color:var(--v2-ink);box-shadow:inset 0 0 0 2px var(--v2-line-strong);border:0}html[data-ui=v2] .a11y-button:hover{box-shadow:inset 0 0 0 2px var(--v2-ink);transform:none}html[data-ui=v2] .a11y-button:active{transition-duration:.1s;transform:scale(.94)}html[data-ui=v2] .a11y-button svg{width:24px;height:24px}html[data-ui=v2] .a11y-panel{max-block-size:calc(100dvh - 68px - env(safe-area-inset-top));overscroll-behavior:contain;overflow-y:auto;box-shadow:0 18px 48px #00000047}html[data-ui=v2] .a11y-close{flex-shrink:0;width:44px;height:44px}html[data-ui=v2] .a11y-size,html[data-ui=v2] .a11y-reset{min-height:44px}html[data-ui=v2] .a11y-statement{min-height:44px;color:var(--v2-ink);align-items:center;display:inline-flex}@media (forced-colors:active){html[data-ui=v2] .a11y-button{border:2px solid canvastext}}html[data-ui=v2] .v2-home-top,html[data-ui=v2] .v2-map-top{padding-inline-end:calc(44px + .5rem)}html[data-ui=v2] .v2-demo-banner{padding-inline-end:calc(44px + 1rem)}html[data-ui=v2] .v2-open-banner{padding-inline:1rem}html[data-ui=v2] .v2-lesson-top{gap:8px;padding-inline:max(16px,50% - 340px) max(60px,50% - 340px)}html[data-ui=v2] .v2-lesson-bar-floor{min-inline-size:72px}html[data-ui=v2] .v2-toast-live{top:calc(env(safe-area-inset-top) + 60px)}html[data-ui=v2] .v2-lesson-teacher{min-block-size:44px;min-inline-size:44px;color:var(--v2-ink);cursor:pointer;background:0 0;border:0;border-radius:12px;flex-shrink:0;place-items:center;padding:0;display:inline-grid}html[data-ui=v2] .v2-lesson-teacher:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}html[data-ui=v2] .v2-lesson-teacher:active svg{transform:scale(.92)}html[data-ui=v2] .v2-ring{flex-shrink:0}html[data-ui=v2] .v2-ring-count{fill:var(--v2-ink);font-family:var(--v2-font-ui);font-variant-numeric:tabular-nums;font-weight:800}html[data-ui=v2] .v2-ring-caption{fill:var(--v2-muted);font-family:var(--v2-font-ui);font-weight:600}@media (forced-colors:active){html[data-ui=v2] .v2-ring-count,html[data-ui=v2] .v2-ring-caption{fill:canvastext}}html[data-ui=v2] .v2-icon{vertical-align:-.125em;flex-shrink:0;block-size:1em;inline-size:1em;display:inline-block}html[data-ui=v2] .v2-row-icon{color:var(--v2-ink);place-items:center;display:inline-grid}html[data-ui=v2] .v2-cookie{margin-block:.5rem 0;margin-inline:calc(var(--v2-rail) + .5rem) calc(44px + 1rem);background:var(--v2-surface);color:var(--v2-ink);box-shadow:0 2px 0 var(--v2-line), inset 0 0 0 1.5px var(--v2-line-strong);font-size:var(--type-sm);border-radius:16px;gap:.5rem;padding:.625rem .875rem;line-height:1.55;display:grid}html[data-ui=v2] .v2-cookie-text{color:var(--v2-ink);overflow-wrap:anywhere;overscroll-behavior:contain;max-block-size:40dvh;margin:0;overflow-y:auto}html[data-ui=v2] .v2-cookie-text:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}html[data-ui=v2] .v2-cookie-link{color:var(--v2-ink);text-underline-offset:3px;font-weight:700;text-decoration:underline}html[data-ui=v2] .v2-cookie-link:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px;border-radius:4px}html[data-ui=v2] .v2-cookie-actions{flex-wrap:wrap;gap:.5rem;display:flex}html[data-ui=v2] .v2-cookie-choice{background:var(--v2-surface);min-block-size:44px;max-inline-size:100%;color:var(--v2-ink);box-shadow:inset 0 0 0 2px var(--v2-line-strong);font:inherit;overflow-wrap:anywhere;cursor:pointer;transition:transform .25s var(--ease-quiet);border:0;border-radius:12px;padding:.25rem 1rem;font-weight:700}html[data-ui=v2] .v2-cookie-choice:active{transition-duration:.1s;transform:translateY(2px)}html[data-ui=v2] .v2-cookie-choice:focus-visible{outline:3px solid var(--v2-ink);outline-offset:2px}@media (forced-colors:active){html[data-ui=v2] .v2-cookie,html[data-ui=v2] .v2-cookie-choice{border:1px solid canvastext}}html[data-ui=v2]:has(.v2-cookie) .cookie-notice{display:none}html[data-ui=v2]:has(.v2-cookie){--cookie-notice-h:0px!important}html[data-ui=v2] .v2-term{color:inherit;font:inherit;line-height:inherit;text-align:inherit;cursor:pointer;text-decoration-line:underline;text-decoration-style:dotted;text-decoration-thickness:2px;-webkit-text-decoration-color:var(--v2-line-strong);text-decoration-color:var(--v2-line-strong);text-underline-offset:.22em;-webkit-tap-highlight-color:transparent;background:0 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