._badge_1qjkn_1{min-height:1.75rem;padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);background:var(--pb-accent-deep);color:var(--pb-on-accent-deep);font-size:var(--text-caption);font-weight:var(--weight-semibold);letter-spacing:.09em;text-transform:uppercase;border:2px solid;align-items:center;line-height:1;display:inline-flex}@media (forced-colors:active){._badge_1qjkn_1{color:buttontext;background:buttonface;border-color:buttontext}}._page_sisw6_7,._accessPage_sisw6_8{--library-tint:color-mix(in srgb, var(--pb-accent) 7%, var(--pb-reading));--library-tint-strong:color-mix(in srgb, var(--pb-accent) 11%, var(--pb-reading))}._page_sisw6_7{min-height:inherit;background:var(--pb-canvas);color:var(--pb-on-canvas);padding:clamp(1rem,3vw,2.5rem)}._hero_sisw6_23,._studyNotice_sisw6_24,._library_sisw6_25,._page_sisw6_7>[data-proof-blocks-surface=activity]{width:min(100%, var(--width-app,74rem));margin-left:auto;margin-right:auto}._hero_sisw6_23{gap:var(--space-2);padding:var(--space-5) 0 var(--space-2);display:grid}._heroLabelRow_sisw6_41,._accessLabelRow_sisw6_42{align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}._eyebrow_sisw6_49,._sectionLabel_sisw6_50{color:var(--pb-accent-ink);font-size:var(--text-caption);font-weight:var(--weight-medium);line-height:var(--leading-caption)}._eyebrow_sisw6_49{color:var(--pb-highlight)}._sectionLabel_sisw6_50{color:var(--pb-muted)}._hero_sisw6_23 h1{font-size:var(--text-page-title);font-weight:var(--weight-semibold);line-height:var(--leading-title);letter-spacing:-.01em;margin:0}._heroTitleRow_sisw6_76{align-items:center;gap:var(--space-3);display:flex}._helpButton_sisw6_82{border:1.5px solid var(--pb-accent-ink);border-radius:var(--radius-full);background:var(--pb-reading);width:2.75rem;height:2.75rem;color:var(--pb-accent-ink);font:inherit;cursor:pointer;flex:none;place-items:center;padding:0;font-size:1.15rem;font-weight:800;display:inline-grid}._helpButton_sisw6_82:hover{background:var(--library-tint);color:var(--pb-accent-ink)}._lede_sisw6_104{max-width:var(--width-reading);color:var(--pb-on-canvas-muted);font-size:var(--text-body);line-height:var(--leading-body);margin:0}._courseSwitcher_sisw6_114{max-width:100%;margin-top:var(--space-3);border:1px solid var(--pb-line);border-radius:var(--radius-md);background:var(--pb-reading-soft);flex-wrap:wrap;justify-self:start;gap:2px;padding:3px;display:inline-flex}._courseSwitcher_sisw6_114 a{min-height:2.75rem;padding:0 var(--space-4);border-radius:calc(var(--radius-md) - 3px);color:var(--pb-panel-ink);font-size:var(--text-secondary);font-weight:var(--weight-medium);transition:background var(--duration-fast,.12s) var(--ease,ease);justify-content:center;align-items:center;text-decoration:none;display:inline-flex}._courseSwitcher_sisw6_114 a:hover:not([aria-current=page]){background:var(--library-tint)}._courseSwitcher_sisw6_114 a[aria-current=page]{background:var(--pb-accent);color:var(--pb-on-accent)}._courseSwitcher_sisw6_114 a:focus-visible{outline:3px solid var(--pb-focus-ring);outline-offset:3px}._studyNotice_sisw6_24{box-sizing:border-box;margin-top:var(--space-3);color:var(--pb-on-canvas-muted);font-size:var(--text-caption);line-height:var(--leading-caption);padding:0}._studyNotice_sisw6_24 strong{color:var(--pb-on-canvas);font-weight:var(--weight-medium)}._page_sisw6_7[data-proof-blocks-activity-open=true] ._hero_sisw6_23{padding-bottom:0}._page_sisw6_7[data-proof-blocks-activity-open=true] ._hero_sisw6_23 h1{font-size:clamp(1.4rem,3vw,1.8rem)}._page_sisw6_7[data-proof-blocks-activity-open=true] ._lede_sisw6_104,._page_sisw6_7[data-proof-blocks-activity-open=true] ._libraryHint_sisw6_179,._page_sisw6_7[data-proof-blocks-activity-open=true] ._levelHint_sisw6_180{display:none}._page_sisw6_7[data-proof-blocks-activity-open=true] ._courseSwitcher_sisw6_114{margin-top:var(--space-2)}._library_sisw6_25{box-sizing:border-box;margin-top:var(--space-4);border:1px solid var(--pb-line);border-radius:var(--radius-lg);background:var(--pb-reading);color:var(--pb-panel-ink);padding:clamp(1rem,2.5vw,1.5rem)}._libraryHeading_sisw6_198{justify-content:space-between;align-items:flex-start;gap:var(--space-4) var(--space-6);margin-bottom:var(--space-4);display:flex}._libraryIntro_sisw6_206{flex:24rem;min-width:0}._libraryHeading_sisw6_198 h2{margin:var(--space-1) 0 0;font-size:var(--text-heading);font-weight:var(--weight-semibold);letter-spacing:-.01em}._libraryHint_sisw6_179{max-width:50rem;margin:var(--space-2) 0 0;color:var(--pb-muted);font-size:var(--text-secondary);line-height:1.5}._levelChoice_sisw6_226{gap:var(--space-1);flex:none;justify-items:start;display:grid}._levelLabel_sisw6_233{color:var(--pb-muted);font-size:var(--text-caption);font-weight:var(--weight-medium)}._levelHint_sisw6_180{color:var(--pb-muted);font-size:var(--text-caption)}._challengeControl_sisw6_244{border:1px solid var(--pb-line);border-radius:var(--radius-full);background:var(--pb-reading-soft);grid-template-columns:1fr 1fr;padding:.2rem;display:inline-grid}._challengeControl_sisw6_244 button{min-height:2.75rem;padding:0 var(--space-4);border-radius:var(--radius-full);color:var(--pb-panel-ink);font:inherit;font-size:var(--text-secondary);font-weight:var(--weight-medium);background:0 0;border:0}._challengeControl_sisw6_244 ._activeSegment_sisw6_265{background:var(--pb-accent);color:var(--pb-on-accent)}._challengeControl_sisw6_244 button:disabled{opacity:.55}._loading_sisw6_274,._error_sisw6_275{padding:var(--space-4);border-radius:var(--radius-md);background:var(--pb-reading-soft);color:var(--pb-panel-ink)}._error_sisw6_275{border:1px solid var(--pb-warning);background:var(--pb-warning-soft);color:var(--pb-on-warning-soft)}._error_sisw6_275 p{margin-top:0}._error_sisw6_275 button,._activityList_sisw6_293 button{min-height:2.75rem;padding:var(--space-2) var(--space-4);border:1px solid var(--pb-accent);border-radius:var(--radius-full);background:var(--pb-accent);color:var(--pb-on-accent);font:inherit;font-size:var(--text-secondary);font-weight:var(--weight-semibold);white-space:nowrap}._activityList_sisw6_293 button{border-color:color-mix(in srgb, var(--pb-panel-ink) 28%, var(--pb-reading));background:var(--pb-reading);color:var(--pb-panel-ink);transition:border-color var(--duration-fast,.12s) var(--ease,ease), background var(--duration-fast,.12s) var(--ease,ease)}._activityList_sisw6_293 button:hover:not(:disabled){border-color:var(--pb-accent);background:var(--library-tint)}._activityList_sisw6_293>li[aria-current=true] button{border-color:var(--pb-accent);background:var(--pb-accent);color:var(--pb-on-accent)}._error_sisw6_275 button:disabled,._activityList_sisw6_293 button:disabled{opacity:.5;cursor:not-allowed}._activityList_sisw6_293{border-top:1px solid var(--pb-line);margin:0;padding:0;list-style:none;display:grid}._activityList_sisw6_293>li{align-items:center;gap:var(--space-4);padding:var(--space-4) var(--space-2);border-bottom:1px solid var(--pb-line);background:var(--pb-reading);border-radius:0;grid-template-columns:auto minmax(0,1fr) auto;display:grid}._activityList_sisw6_293>li[aria-current=true]{border-radius:var(--radius-md);background:var(--library-tint);box-shadow:inset 3px 0 0 var(--pb-accent)}._activityNumber_sisw6_359{border:1px solid var(--pb-line);border-radius:var(--radius-full);background:var(--pb-reading);width:2.25rem;height:2.25rem;color:var(--pb-muted);font-size:var(--text-caption);font-variant-numeric:tabular-nums;font-weight:var(--weight-semibold);place-items:center;display:grid}._activityList_sisw6_293>li[aria-current=true] ._activityNumber_sisw6_359{border-color:var(--pb-accent);background:var(--pb-accent);color:var(--pb-on-accent)}._activitySummary_sisw6_379{min-width:0}._activityMeta_sisw6_383{align-items:center;gap:var(--space-2);color:var(--pb-muted);font-size:var(--text-caption);flex-wrap:wrap;display:flex}._openNow_sisw6_392{padding:.05rem var(--space-2);border-radius:var(--radius-full);background:var(--library-tint-strong);color:var(--pb-accent-ink);font-size:var(--text-caption);font-weight:var(--weight-semibold)}._activitySummary_sisw6_379 h3{font-family:var(--font-ui);font-size:var(--text-body);font-weight:var(--weight-medium);text-wrap:pretty;margin:.2rem 0 0;line-height:1.45}._srOnly_sisw6_410{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (max-width:700px){._page_sisw6_7{padding-right:max(.75rem, env(safe-area-inset-right));padding-left:max(.75rem, env(safe-area-inset-left))}._libraryHeading_sisw6_198{align-items:stretch;gap:var(--space-4);flex-direction:column}._libraryIntro_sisw6_206{flex-basis:auto}._levelChoice_sisw6_226{justify-items:stretch}._challengeControl_sisw6_244{width:100%}._activityList_sisw6_293>li{grid-template-columns:auto minmax(0,1fr);align-items:start}._activityList_sisw6_293 button{grid-column:2;justify-self:start}}@media (forced-colors:active){:is(._challengeControl_sisw6_244 button:focus-visible,._activityList_sisw6_293 button:focus-visible){outline-offset:2px;outline:3px solid highlight}._activityList_sisw6_293>li[aria-current=true]{border-width:3px}}@media (prefers-reduced-motion:reduce){._page_sisw6_7 *,._page_sisw6_7 :before,._page_sisw6_7 :after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}._accessPage_sisw6_8{min-height:inherit;background:var(--pb-canvas);color:var(--pb-on-canvas);place-items:center;padding:clamp(1rem,4vw,3rem);display:grid}._accessCard_sisw6_488{border:1px solid var(--pb-line);background:var(--pb-reading);width:min(100%,42rem);color:var(--pb-panel-ink);box-shadow:var(--pb-shadow);border-radius:1.5rem;padding:clamp(1.5rem,5vw,3.25rem)}._accessEyebrow_sisw6_498{color:var(--pb-accent-ink);font-size:var(--text-caption);letter-spacing:.09em;text-transform:uppercase;font-weight:850}._accessLabelRow_sisw6_42{justify-content:space-between}._accessCard_sisw6_488 h1{max-width:17ch;margin:var(--space-2) 0 var(--space-4);font-size:clamp(2.15rem,7vw,4.6rem);line-height:.98}._accessCard_sisw6_488 p{max-width:58ch;color:var(--pb-muted);font-size:var(--text-subheading);margin:0;line-height:1.65}._accessActions_sisw6_525{gap:var(--space-3);margin-top:var(--space-5);flex-wrap:wrap;display:flex}._accessActions_sisw6_525 a{min-height:2.75rem;padding:var(--space-3) var(--space-4);border:1px solid var(--pb-accent);border-radius:var(--radius-md);background:var(--pb-accent);color:var(--pb-on-accent);justify-content:center;align-items:center;font-weight:800;text-decoration:none;display:inline-flex}._accessActions_sisw6_525 ._secondaryAction_sisw6_546{color:var(--pb-accent-ink);background:0 0}:is(._page_sisw6_7 button:focus-visible,._accessActions_sisw6_525 a:focus-visible){outline:3px solid var(--pb-focus-ring);outline-offset:3px}._progressSummary_sisw6_558{margin:var(--space-2) 0 0;color:var(--pb-muted);font-size:var(--text-caption);font-weight:700}._resumeButton_sisw6_565{margin-top:var(--space-3);min-height:2.75rem;padding:0 var(--space-4);border-radius:var(--radius-full);background:var(--pb-accent);color:var(--pb-on-accent);font:inherit;cursor:pointer;border:0;font-weight:800}._resumeButton_sisw6_565:disabled{cursor:wait;opacity:.7}._resumeButton_sisw6_565:focus-visible{outline:3px solid var(--pb-focus-ring);outline-offset:2px}._progressStatus_sisw6_588{margin-left:var(--space-2);padding:.1rem var(--space-2);border:1px solid var(--pb-line);border-radius:var(--radius-full);color:var(--pb-panel-ink);font-size:var(--text-caption);font-weight:700}._page_sisw6_7[data-proof-blocks-activity-open=true] ._progressSummary_sisw6_558{display:none}._tasterNotice_sisw6_604{box-sizing:border-box;gap:var(--space-2);width:min(100%,74rem);margin:var(--space-3) auto 0;padding:var(--space-3) var(--space-4);border:1px solid var(--pb-line);border-radius:var(--radius-md);background:var(--pb-reading-soft);color:var(--pb-panel-ink);font-size:var(--text-secondary);line-height:1.5;display:grid}._tasterNotice_sisw6_604 h2{font-size:var(--text-body);margin:0}._tasterNotice_sisw6_604 p{margin:0}._tasterNotice_sisw6_604 a{justify-self:start;font-weight:700}._progressWarning_sisw6_633{margin:var(--space-3) 0 0;padding:var(--space-3) var(--space-4);border:1px solid var(--pb-danger);border-radius:var(--radius-md);background:var(--pb-danger-soft);color:var(--pb-on-danger-soft);font-size:var(--text-secondary);font-weight:700}._survivalLink_sisw6_644{margin:0}._survivalLink_sisw6_644 a{min-height:44px;color:var(--pb-highlight);border:1.5px solid;border-radius:999px;align-items:center;gap:6px;padding:8px 18px;font-weight:650;text-decoration:none;display:inline-flex}._survivalLink_sisw6_644 a:hover{text-decoration:underline}._survivalLink_sisw6_644 a:focus-visible{outline:3px solid var(--pb-focus-ring);outline-offset:3px}@media (forced-colors:active){._survivalLink_sisw6_644 a{color:linktext}}._sampleEnd_sisw6_666{box-sizing:border-box;justify-content:space-between;align-items:center;gap:var(--space-3) var(--space-5);width:min(100%,74rem);margin:var(--space-4) auto 0;padding:var(--space-4) var(--space-5);border:1px solid var(--pb-line);background:var(--pb-reading);box-shadow:var(--pb-shadow);color:var(--pb-panel-ink);border-radius:1.25rem;flex-wrap:wrap;display:flex}._sampleEnd_sisw6_666 h2{margin:0;font-size:clamp(1.05rem,2vw,1.25rem);line-height:1.35}._sampleEndActions_sisw6_689{gap:var(--space-2);flex-wrap:wrap;display:flex}._sampleEndActions_sisw6_689 a,._sampleEndActions_sisw6_689 button{min-height:2.75rem;padding:var(--space-2) var(--space-5);border:1px solid var(--pb-accent);border-radius:var(--radius-md);font:inherit;align-items:center;font-weight:750;text-decoration:none;display:inline-flex}._sampleEndActions_sisw6_689 a{background:var(--pb-accent);color:var(--pb-on-accent)}._sampleEndActions_sisw6_689 button{background:var(--pb-reading);color:var(--pb-accent-ink);cursor:pointer}._sampleEndActions_sisw6_689 button:disabled{opacity:.5;cursor:not-allowed}:is(._sampleEndActions_sisw6_689 a:focus-visible,._sampleEnd_sisw6_666 h2:focus-visible){outline:3px solid var(--pb-focus-ring);outline-offset:3px}@media (forced-colors:active){._helpButton_sisw6_82,._sampleEndActions_sisw6_689 a,._sampleEndActions_sisw6_689 button{border-color:buttontext}}._progressStatus_sisw6_588[data-proof-blocks-completed-this-visit]{transform-origin:50%;animation:_progress-stamp_sisw6_1 .32s var(--ease,ease-out) 1 both}@keyframes _progress-stamp_sisw6_1{0%{opacity:.55;transform:scale(1.04)}to{opacity:1;transform:scale(1)}}html[data-pb-quiet-wins] ._progressStatus_sisw6_588[data-proof-blocks-completed-this-visit]{animation:none}@media (prefers-reduced-motion:reduce){._progressStatus_sisw6_588[data-proof-blocks-completed-this-visit]{animation:none}}