@layer tokens,base;@layer ui{@media (hover:hover){._surfaceCardHoverLift_1r3fn_84:hover{box-shadow:var(--shadow-surface-card-hover);transform:translateY(-2px)}}@media (hover:hover){._surfaceInteractive_1r3fn_89:hover{border-color:var(--effect-brand-border);transform:translateY(-1px)}}@media (width<=720px){._internalHeaderInner_1r3fn_165{padding-block:var(--space-3);grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"brand profile""nav nav"}._internalHeaderBrand_1r3fn_174{grid-area:brand}._internalHeaderNav_1r3fn_183{justify-self:start;gap:var(--space-4);grid-area:nav}._profileShell_1r3fn_204{grid-area:profile}._internalHeaderBrandTitle_1r3fn_238{font-size:var(--text-size-base)}._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderInner_1r3fn_165{gap:var(--space-3);min-height:var(--shell-topbar-height);grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"brand nav";padding-block:0}._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderNav_1r3fn_183{justify-self:end;gap:var(--space-2);flex-wrap:nowrap}._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderNavLink_1r3fn_190{min-height:var(--control-height-compact);font-size:var(--text-size-xs)}._internalHeader_1r3fn_158[data-header-context=lesson] ._profileShell_1r3fn_204,._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderBrandLabel_1r3fn_245{display:none}}@media (hover:hover){._surfaceCardHoverLift_1r3fn_84:hover{box-shadow:var(--shadow-surface-card-hover);transform:translateY(-2px)}}@media (hover:hover){._surfaceInteractive_1r3fn_89:hover{border-color:var(--effect-brand-border);transform:translateY(-1px)}}@media (width<=720px){._internalHeaderInner_1r3fn_165{padding-block:var(--space-3);grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"brand profile""nav nav"}._internalHeaderBrand_1r3fn_174{grid-area:brand}._internalHeaderNav_1r3fn_183{justify-self:start;gap:var(--space-4);grid-area:nav}._profileShell_1r3fn_204{grid-area:profile}._internalHeaderBrandTitle_1r3fn_238{font-size:var(--text-size-base)}._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderInner_1r3fn_165{gap:var(--space-3);min-height:var(--shell-topbar-height);grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"brand nav";padding-block:0}._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderNav_1r3fn_183{justify-self:end;gap:var(--space-2);flex-wrap:nowrap}._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderNavLink_1r3fn_190{min-height:var(--control-height-compact);font-size:var(--text-size-xs)}._internalHeader_1r3fn_158[data-header-context=lesson] ._profileShell_1r3fn_204,._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderBrandLabel_1r3fn_245{display:none}}._surface_1r3fn_4{padding:var(--space-5);border:1px solid var(--color-surface-border);border-radius:var(--radius-lg);background:var(--color-surface-raised);box-shadow:var(--shadow-raised)}._eyebrow_1r3fn_11{color:var(--color-brand-strong);font-size:var(--text-size-xs);font-weight:var(--weight-bold);line-height:var(--leading-title);letter-spacing:var(--tracking-label);text-transform:uppercase;margin:0}._meta_1r3fn_20{color:var(--color-ink-muted);font-size:var(--text-size-xs);font-weight:var(--weight-medium);line-height:var(--leading-helper);letter-spacing:var(--tracking-default);margin:0}._metaLabel_1r3fn_28{font-weight:var(--weight-semibold)}._helper_1r3fn_35{color:var(--color-ink-muted);font-size:var(--text-size-xs);font-weight:var(--weight-normal);line-height:var(--leading-helper);letter-spacing:var(--tracking-default);margin:0}._stack_1r3fn_43{gap:var(--space-4);display:grid}._stackLg_1r3fn_47{gap:var(--space-7)}._cluster_1r3fn_50{gap:var(--space-3);flex-wrap:wrap;align-items:center;display:flex}._cardTitle_1r3fn_59{color:var(--color-ink-strong);margin:0}._mutedCopy_1r3fn_63{color:var(--color-ink-muted);margin:0}._surfaceSubtle_1r3fn_67{border:1px solid var(--color-surface-border);border-radius:var(--radius-md-plus);background:var(--color-surface-canvas)}._surfaceCard_1r3fn_72{border:1px solid var(--color-surface-border);border-radius:var(--radius-md-plus);background:var(--color-surface-raised);box-shadow:var(--shadow-surface-card-subtle);transition:transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);display:grid}@media (hover:hover){._surfaceCardHoverLift_1r3fn_84:hover{box-shadow:var(--shadow-surface-card-hover);transform:translateY(-2px)}}._surfaceInteractive_1r3fn_89{border:1px solid var(--color-surface-border);border-radius:var(--radius-md-plus);background:var(--color-surface-raised);transition:transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast)}._surfaceInteractive_1r3fn_89:active{transform:translateY(0)}@media (hover:hover){._surfaceInteractive_1r3fn_89:hover{border-color:var(--effect-brand-border);transform:translateY(-1px)}}._statusBadge_1r3fn_107{align-items:center;gap:var(--control-badge-gap);width:fit-content;padding:var(--control-badge-padding);border-radius:var(--radius-pill);font-size:var(--text-size-xs);font-weight:var(--weight-bold);line-height:var(--leading-tight);border:1px solid #0000;display:inline-flex}._statusBadge_1r3fn_107[data-tone=accent]{background:var(--color-brand-soft);border-color:var(--effect-brand-border);color:var(--color-brand-strong)}._statusBadge_1r3fn_107[data-tone=neutral]{background:var(--color-surface-canvas);border-color:var(--color-surface-border);color:var(--color-ink-muted)}._statusBadge_1r3fn_107[data-tone=locked]{background:var(--effect-surface-muted);border-color:var(--effect-surface-muted-border);color:var(--color-ink-muted)}._progressMeter_1r3fn_134{gap:var(--space-2);display:grid}._progressTrack_1r3fn_138{height:var(--progress-track-height);border-radius:var(--radius-pill);background:var(--effect-surface-muted-border);overflow:hidden}._progressFill_1r3fn_144{width:var(--progress-value,0%);border-radius:inherit;background:var(--gradient-brand-progress);height:100%;transition:width var(--transition-fast)}._internalPageShell_1r3fn_151{grid-template-rows:auto minmax(0,1fr);min-height:100dvh;padding-block:0;display:grid}._internalHeader_1r3fn_158{z-index:var(--z-sticky-header);border-bottom:1px solid var(--effect-surface-divider-subtle);background:var(--color-surface-raised);position:sticky;top:0}._internalHeaderInner_1r3fn_165{gap:clamp(var(--space-4), 3vw, var(--space-8));width:var(--chrome-content-width);min-height:var(--shell-topbar-height);grid-template-columns:minmax(0,1fr) auto auto;align-items:center;margin-inline:auto;display:grid}._internalHeaderBrand_1r3fn_174{gap:var(--space-3);min-width:0;color:var(--color-ink-strong);justify-self:start;align-items:center;text-decoration:none;display:inline-flex}._internalHeaderNav_1r3fn_183{gap:clamp(var(--space-4), 2vw, var(--space-7));flex-wrap:wrap;justify-self:center;align-items:center;display:flex}._internalHeaderNavLink_1r3fn_190{min-height:var(--control-height-sm);color:var(--color-ink-strong);font-size:var(--text-size-base);font-weight:var(--weight-normal);letter-spacing:var(--tracking-default);transition:color var(--transition-fast);align-items:center;text-decoration:none;display:inline-flex}._internalHeaderNavLink_1r3fn_190:hover{color:var(--color-brand-hover)}._profileShell_1r3fn_204{width:var(--chrome-compact-square-size);height:var(--chrome-compact-square-size);border-radius:var(--radius-pill);color:var(--color-ink-strong);justify-content:center;justify-self:end;align-items:center;display:inline-flex}._profileShellGlyph_1r3fn_214{font-size:var(--text-size-md);line-height:1}._internalHeaderBrandMark_1r3fn_218{width:var(--chrome-compact-square-size);height:var(--chrome-compact-square-size);border-radius:var(--radius-sm);background:var(--gradient-brand-accent);flex-shrink:0;place-items:center;display:inline-grid}._internalHeaderBrandMarkText_1r3fn_227{color:var(--color-surface-raised);font-size:var(--text-size-xs);font-weight:var(--weight-bold);letter-spacing:var(--tracking-default);line-height:1}._internalHeaderBrandText_1r3fn_234{min-width:0;display:grid}._internalHeaderBrandTitle_1r3fn_238{color:var(--color-ink-strong);font-size:var(--text-size-md);font-weight:var(--weight-semibold);line-height:var(--leading-title);letter-spacing:var(--tracking-default)}._internalHeaderBrandLabel_1r3fn_245{color:var(--color-ink-muted);font-size:var(--text-size-xs);font-weight:var(--weight-semibold);line-height:var(--leading-helper);letter-spacing:var(--tracking-label);text-transform:uppercase}@media (width<=720px){._internalHeaderInner_1r3fn_165{padding-block:var(--space-3);grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"brand profile""nav nav"}._internalHeaderBrand_1r3fn_174{grid-area:brand}._internalHeaderNav_1r3fn_183{justify-self:start;gap:var(--space-4);grid-area:nav}._profileShell_1r3fn_204{grid-area:profile}._internalHeaderBrandTitle_1r3fn_238{font-size:var(--text-size-base)}._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderInner_1r3fn_165{gap:var(--space-3);min-height:var(--shell-topbar-height);grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"brand nav";padding-block:0}._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderNav_1r3fn_183{justify-self:end;gap:var(--space-2);flex-wrap:nowrap}._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderNavLink_1r3fn_190{min-height:var(--control-height-compact);font-size:var(--text-size-xs)}._internalHeader_1r3fn_158[data-header-context=lesson] ._profileShell_1r3fn_204,._internalHeader_1r3fn_158[data-header-context=lesson] ._internalHeaderBrandLabel_1r3fn_245{display:none}}}@layer features;._completionPanel_1b0x2_1{gap:var(--space-4);width:min(100%,34rem);padding:var(--space-panel-fluid);margin-inline:auto;display:grid}._completionPanel_1b0x2_1[hidden]{display:none}._completionEyebrow_1b0x2_11{justify-content:center;align-items:center;gap:var(--space-2);color:var(--color-ink-strong);font-size:var(--text-heading-completion);font-weight:var(--weight-bold);text-align:center;margin:0;display:inline-flex}._completionHeading_1b0x2_22{color:var(--color-ink-strong);font-size:var(--text-heading-completion);line-height:var(--leading-title);letter-spacing:var(--tracking-default);text-align:center;margin:0}._completionEyebrowIcon_1b0x2_30{width:var(--icon-size-2xl);height:var(--icon-size-2xl);border-radius:var(--radius-pill);background:var(--color-warning-soft);color:var(--color-warning-strong);font-size:var(--text-size-lg);place-items:center;display:inline-grid}._summaryHeading_1b0x2_40{color:var(--color-ink-strong);font-size:var(--text-size-md);font-weight:var(--weight-bold);line-height:var(--leading-title);text-align:center;margin:0}._completionBody_1b0x2_48{color:var(--color-ink-muted);font-size:var(--text-size-md);line-height:var(--leading-relaxed);text-align:center;margin:0}._completionBody_1b0x2_48 strong{color:var(--color-brand-strong)}._summaryCard_1b0x2_58{gap:var(--space-4);padding:var(--space-5);display:grid}._summaryGrid_1b0x2_64{gap:var(--space-3);margin:0;display:grid}._summaryItem_1b0x2_69{align-items:center;gap:var(--space-4);grid-template-columns:minmax(0,1fr) auto;display:grid}._summaryLabel_1b0x2_75{align-items:center;gap:var(--space-3);color:var(--color-ink-muted);font-size:var(--text-size-base);font-weight:var(--weight-semibold);display:inline-flex}._summaryIcon_1b0x2_83{width:var(--icon-size-lg);height:var(--icon-size-lg);border-radius:var(--radius-pill);font-size:var(--text-size-xs);font-weight:var(--weight-bold);place-items:center;display:inline-grid}._summaryIcon_1b0x2_83[data-tone=success]{background:var(--color-success-soft);color:var(--color-success-strong)}._summaryIcon_1b0x2_83[data-tone=accent]{background:var(--color-brand-soft);color:var(--color-brand-strong)}._summaryIcon_1b0x2_83[data-tone=highlight]{background:color-mix(in srgb, var(--color-brand-gradient-end) 12%, transparent);color:var(--color-brand-gradient-end)}._summaryValue_1b0x2_108{color:var(--color-ink-strong);font-size:var(--text-size-md);font-weight:var(--weight-bold);margin:0}._summaryValue_1b0x2_108[data-tone=accent]{color:var(--color-brand-strong)}._summaryValue_1b0x2_108[data-tone=highlight]{color:var(--color-brand-gradient-end)}._completionNote_1b0x2_120{color:var(--color-ink-muted);font-size:var(--text-size-base);line-height:var(--leading-relaxed);text-align:center;margin:0}._completionActions_1b0x2_127{justify-content:center;display:flex}._completionAction_1b0x2_127{width:fit-content}@media (width<=960px){._completionPanel_1b0x2_1{width:100%}}@media (width<=720px){._completionActions_1b0x2_127,._completionAction_1b0x2_127{width:100%}._summaryItem_1b0x2_69{grid-template-columns:1fr;gap:.45rem}._summaryValue_1b0x2_108{padding-left:var(--space-8)}}._page_1s3wm_1{background:linear-gradient(180deg, var(--effect-page-overlay-strong) 0%, var(--effect-page-canvas-overlay) 100%);min-height:100dvh;display:grid}._stepLabel_1s3wm_11{color:var(--color-ink-muted);font-size:var(--text-size-base);font-weight:var(--weight-normal)}._headerShell_1s3wm_17{z-index:var(--z-sticky-header)}._skipLink_1s3wm_20{top:var(--space-3);left:var(--space-3);z-index:calc(var(--z-sticky-header) + 1);padding:var(--space-3) var(--space-4);border-radius:var(--radius-pill);background:var(--color-ink-strong);color:var(--color-surface-raised);font-weight:var(--weight-bold);transform:translateY(calc(-100% - var(--space-4)));transition:transform var(--transition-fast);text-decoration:none;position:fixed}._skipLink_1s3wm_20:focus-visible{transform:translateY(0)}._main_1s3wm_37{min-height:calc(100dvh - var(--lesson-header-height,var(--shell-topbar-height)));display:grid}._returnToSummaryButton_1s3wm_43{box-shadow:var(--shadow-button-soft)}._mobileStepsTrigger_1s3wm_46{display:none}._mobileStepsTriggerLabel_1s3wm_49,._mobileStepsTriggerValue_1s3wm_50{display:block}._mobileStepsTriggerValue_1s3wm_50{font-size:var(--text-size-xs);line-height:var(--leading-helper)}._workspace_1s3wm_57{grid-template-columns:minmax(var(--lesson-rail-width-min), var(--lesson-rail-width-max)) minmax(0, 1fr);min-height:calc(100dvh - var(--lesson-header-height,var(--shell-topbar-height)));align-items:stretch;display:grid}._workspace_1s3wm_57[hidden],._returnToSummaryButton_1s3wm_43[hidden],[data-lesson-complete=true] ._workspace_1s3wm_57{display:none}[data-lesson-rail-collapsed=true] ._workspace_1s3wm_57{grid-template-columns:minmax(var(--lesson-rail-width-collapsed), var(--lesson-rail-width-collapsed)) minmax(0, 1fr)}._stage_1s3wm_81{align-content:start;gap:var(--space-4);padding:var(--space-4) var(--space-stage-inline-fluid) var(--space-stage-inline-fluid);display:grid}._stageHeader_1s3wm_88{gap:var(--space-3);width:100%;padding-bottom:var(--space-3);border-bottom:1px solid var(--effect-surface-muted);display:grid}._stageHeaderTop_1s3wm_95{align-items:center;gap:var(--space-4);grid-template-columns:minmax(0,1fr) auto;display:grid}._stageBackLink_1s3wm_101{align-items:center;gap:var(--space-2);min-width:0;color:var(--color-ink-muted);font-size:var(--text-size-md);font-weight:var(--weight-medium);white-space:nowrap;text-decoration:none;display:inline-flex}._stageBackLink_1s3wm_101:hover{color:var(--color-ink-strong)}._stageBackLinkIcon_1s3wm_115{font-size:var(--text-size-base);line-height:1}._stageMeta_1s3wm_119{justify-content:flex-end;align-items:center;gap:var(--space-3);flex-wrap:nowrap;min-width:0;display:flex}._stageProgress_1s3wm_127{width:100%}._stageBody_1s3wm_130{justify-self:center;width:min(100%,48rem)}._completionScreen_1s3wm_134[hidden]{display:none}@media (width<=960px){._stepLabel_1s3wm_11{display:none}._workspace_1s3wm_57{grid-template-columns:minmax(0,1fr)}._mobileStepsTrigger_1s3wm_46{justify-items:start;gap:.1rem;min-width:9rem;padding-block:.45rem;display:inline-grid}._stage_1s3wm_81{width:100%;padding-top:var(--space-3)}}@media (width<=720px){._stepLabel_1s3wm_11{font-size:clamp(var(--text-size-xs), 3vw, var(--text-size-base));line-height:var(--leading-question);white-space:nowrap}._stage_1s3wm_81{padding:var(--space-3) var(--space-3) var(--space-6);gap:var(--space-4)}._stageHeader_1s3wm_88{gap:var(--space-2);width:100%;padding-bottom:var(--space-3)}._stageHeaderTop_1s3wm_95{gap:var(--space-2);grid-template-columns:minmax(0,1fr) auto}._stageMeta_1s3wm_119{gap:var(--space-2);flex-wrap:wrap;justify-content:flex-end}._stageBackLink_1s3wm_101{font-size:var(--text-size-base)}._mobileStepsTrigger_1s3wm_46{justify-items:end;min-width:auto}}._rail_sl654_1{--lesson-drawer-shadow:0 1px 3px color-mix(in srgb, var(--color-ink-strong) 8%, transparent), 0 26px 54px -24px color-mix(in srgb, var(--color-ink-strong) 24%, transparent);gap:var(--space-4);top:var(--lesson-header-height,var(--shell-topbar-height));height:calc(100dvh - var(--lesson-header-height,var(--shell-topbar-height)));min-height:0;padding:var(--space-4) var(--space-5) var(--space-8);border-right:1px solid var(--effect-surface-muted);background:var(--color-surface-raised);grid-template-rows:auto minmax(0,1fr);display:grid;position:sticky}._railHeader_sl654_18{gap:var(--space-2);display:grid}._railHeaderTop_sl654_22{justify-content:space-between;gap:var(--space-3);align-items:flex-start;display:flex}._railHeaderCopy_sl654_28{gap:var(--space-2);min-width:0;display:grid}._lessonTitle_sl654_33{color:var(--color-ink-strong);font-size:var(--text-size-base);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-default);line-height:var(--leading-body);margin:0}._railMetaRow_sl654_41{justify-content:space-between;align-items:center;gap:var(--space-3);min-width:0;display:flex}._lessonContext_sl654_48{color:var(--color-ink-muted);font-size:var(--text-size-xs);font-weight:var(--weight-normal);line-height:var(--leading-helper);margin:0}._progressLabel_sl654_56{color:var(--color-ink-muted);font-size:var(--text-size-xs);line-height:var(--leading-helper);text-align:right;white-space:nowrap;margin:0}._railToggle_sl654_65{width:var(--control-height-icon-sm);height:var(--control-height-icon-sm);box-shadow:none;color:var(--color-ink-strong);cursor:pointer;appearance:none;background:0 0;border:none;place-items:center;padding:0;display:inline-grid}._railToggle_sl654_65:hover{color:var(--color-brand-strong)}._railToggle_sl654_65:focus-visible{outline:2px solid var(--color-focus-ring);outline-offset:var(--space-1);color:var(--color-brand-strong)}._railToggleIcon_sl654_86{width:var(--icon-size-sm);height:var(--icon-size-sm);pointer-events:none;flex:none}._mobileRailBackdrop_sl654_92,._mobileRailClose_sl654_93{display:none}._lessonRail_sl654_96{align-content:start;gap:var(--space-3);min-height:0;padding:0;padding-right:var(--space-1);margin:0;list-style:none;display:grid;overflow-y:auto}._lessonRailLink_sl654_107{gap:var(--space-3);padding:var(--space-3) var(--space-4);box-shadow:var(--shadow-button-soft);color:var(--color-ink-muted);grid-template-columns:auto minmax(0,1fr);align-items:center;text-decoration:none;display:grid}._lessonRailLink_sl654_107:hover:not([data-locked=true]){color:var(--color-ink-strong)}._lessonRailLink_sl654_107:focus-visible{outline:2px solid var(--color-focus-ring);outline-offset:2px;color:var(--color-ink-strong)}._lessonRailLink_sl654_107[data-current=true]{border-color:var(--effect-brand-border);background:var(--color-brand-soft);box-shadow:inset 0 0 0 1px var(--effect-brand-border);color:var(--color-ink-strong)}._lessonRailLink_sl654_107[data-current=true]:not(:focus-visible){box-shadow:inset 0 0 0 1px var(--effect-brand-border)}._lessonRailLink_sl654_107[data-complete=true]{color:var(--color-ink-muted)}._lessonRailLink_sl654_107[data-locked=true]{background:var(--color-surface-raised);color:var(--color-ink-muted);cursor:default}._lessonRailLink_sl654_107[data-locked=true]:hover{border-color:var(--color-surface-border);transform:none}._lessonRailIndex_sl654_147{border-radius:var(--radius-pill);background:var(--effect-surface-muted-border);width:1.85rem;min-height:1.85rem;color:inherit;font-size:var(--text-size-xs);font-weight:var(--weight-bold);place-items:center;display:inline-grid}._lessonRailLink_sl654_107[data-current=true] ._lessonRailIndex_sl654_147{background:var(--color-brand-soft);color:var(--color-brand-strong);box-shadow:inset 0 0 0 1px var(--effect-brand-border)}._lessonRailLink_sl654_107[data-complete=true] ._lessonRailIndex_sl654_147{background:var(--color-success-ink);color:var(--color-surface-raised)}._lessonRailText_sl654_167{display:grid}._lessonRailText_sl654_167 strong{color:inherit;font-size:var(--text-size-xs);line-height:var(--leading-question);display:block}@media (width<=960px){._mobileRailBackdrop_sl654_92{inset:var(--lesson-header-height,var(--shell-topbar-height)) 0 0 min(var(--lesson-rail-drawer-width), calc(100vw - var(--space-11)));background:color-mix(in srgb, var(--color-ink-strong) 18%, transparent);opacity:0;pointer-events:none;transition:opacity var(--transition-fast);z-index:var(--z-lesson-drawer-backdrop);border:none;padding:0;display:block;position:fixed}._rail_sl654_1{inset:var(--lesson-header-height,var(--shell-topbar-height)) auto 0 0;z-index:var(--z-lesson-drawer);width:min(var(--lesson-rail-drawer-width), calc(100vw - var(--space-11)));height:calc(100dvh - var(--lesson-header-height,var(--shell-topbar-height)));border-right:1px solid var(--effect-surface-muted);box-shadow:var(--lesson-drawer-shadow);transform:translateX(calc(-100% - var(--space-4)));opacity:0;pointer-events:none;visibility:hidden;transition:transform var(--transition-drawer), opacity var(--transition-drawer);position:fixed}._mobileRailClose_sl654_93{min-height:var(--control-height-compact);padding:var(--control-badge-padding);border:1px solid var(--effect-surface-muted-border);border-radius:var(--radius-pill);background:var(--color-surface-base);color:var(--color-ink-strong);font-size:var(--text-size-xs);font-weight:var(--weight-semibold);cursor:pointer;justify-content:center;align-items:center;display:inline-flex}._mobileRailClose_sl654_93:focus-visible{outline:2px solid var(--color-focus-ring);outline-offset:var(--space-1)}._railToggle_sl654_65{display:none}[data-mobile-lesson-nav-open=true] ._mobileRailBackdrop_sl654_92{opacity:1;pointer-events:auto}[data-mobile-lesson-nav-open=true] ._rail_sl654_1{opacity:1;pointer-events:auto;visibility:visible;transform:translate(0)}}[data-lesson-rail-collapsed=true] ._rail_sl654_1{padding-inline:var(--space-3)}[data-lesson-rail-collapsed=true] ._railHeader_sl654_18{justify-items:center}[data-lesson-rail-collapsed=true] ._railHeaderCopy_sl654_28,[data-lesson-rail-collapsed=true] ._lessonRailText_sl654_167{display:none}[data-lesson-rail-collapsed=true] ._railToggle_sl654_65{width:var(--control-height-icon-sm)}[data-lesson-rail-collapsed=true] ._lessonRailLink_sl654_107{padding-inline:var(--control-badge-gap);grid-template-columns:1fr;justify-items:center}[data-lesson-rail-collapsed=true] ._railToggleIcon_sl654_86{transform:scaleX(-1)}