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var(--pm-color-border-strong);background:var(--pm-color-surface);min-width:0;height:1.75rem;font-size:var(--pm-font-size-xs);color:var(--pm-color-ink);flex:1;place-items:center;display:grid}.path__step.is-past{background:var(--pm-color-sunken)}.path__step.is-now{background:var(--pm-color-ink);border-color:var(--pm-color-ink);color:var(--pm-color-paper);font-weight:var(--pm-font-weight-bold)}.cards{gap:var(--pm-space-4);grid-template-columns:repeat(auto-fill,minmax(17rem,1fr));margin:0;padding:0;list-style:none;display:grid}.cards .card p{margin-bottom:var(--pm-space-1)}.card__title{color:var(--pm-color-ink);text-decoration:none}.card__title:after{content:"";position:absolute;inset:0}.card--link{position:relative}.card--link:hover{border-color:var(--pm-color-ink)}.gap{align-items:flex-start}.history{height:9rem;padding:var(--pm-space-3) var(--pm-space-3) 0;background:var(--pm-color-surface);border:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-md);grid-template-columns:repeat(14,minmax(0,1fr));align-items:end;gap:4px;margin:0;display:grid;position:relative}.history figcaption{left:var(--pm-space-3);top:var(--pm-space-1);position:absolute}.history__col{flex-direction:column;justify-content:flex-end;align-items:center;height:100%;padding-top:1.5rem;display:flex}.history__bar{background:var(--pm-color-ink);border-radius:2px 2px 0 0;width:100%;min-height:2px}.history__bar[data-n="0"]{background:var(--pm-color-border-strong)}.history__day{line-height:1.6}.table{border-collapse:collapse;background:var(--pm-color-surface);border:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-md);width:100%;overflow:hidden}.table th,.table td{text-align:left;padding:var(--pm-space-2) var(--pm-space-3);border-bottom:var(--pm-stroke-hairline) solid var(--pm-color-grid);vertical-align:top}.table th{font-size:var(--pm-font-size-sm);color:var(--pm-color-ink-muted);background:var(--pm-color-sunken)}.table tr:last-child td{border-bottom:0}.session{gap:var(--pm-space-3);flex-direction:column;display:flex}.session__wait{padding:var(--pm-space-6) 0;text-align:center}.player{gap:var(--pm-space-4);flex-direction:column;display:flex}.qscreen{gap:var(--pm-space-2);flex-direction:column;height:calc(100dvh - 8rem);min-height:19rem;display:flex;position:relative}.qscreen>*{flex-shrink:0}.qscreen>.figure-area{flex-shrink:1}.player__meta{justify-content:space-between;align-items:center;gap:var(--pm-space-3);min-height:2rem;color:var(--pm-color-ink-muted);font-size:var(--pm-font-size-sm);display:flex}.player__meta-right{align-items:center;gap:var(--pm-space-2);display:inline-flex}.player__label{overflow-wrap:anywhere;flex:6rem;min-width:0}.player__clock{color:var(--pm-color-ink);font-weight:var(--pm-font-weight-semibold);font-size:var(--pm-font-size-md);font-feature-settings:var(--pm-font-tabular);font-variant-numeric:tabular-nums lining-nums}.player__clock.is-over{font-weight:var(--pm-font-weight-bold);text-decoration:underline;text-decoration-thickness:var(--pm-stroke-emphasis);text-underline-offset:.2em}.player__prompt{font-size:var(--pm-font-size-lg);font-weight:var(--pm-font-weight-semibold);line-height:var(--pm-font-leading-tight);margin:0}.player__ask{margin:0}.player__actions{align-items:center;gap:var(--pm-space-3);flex-wrap:wrap;display:flex}.player__pending{padding:var(--pm-space-3) var(--pm-space-4);border:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-sm);background:var(--pm-color-surface)}.player__pop{z-index:var(--pm-z-overlay);max-width:32rem;padding:var(--pm-space-3);background:var(--pm-color-surface);border:var(--pm-stroke-figure) solid var(--pm-color-ink);border-radius:var(--pm-radius-md);max-height:calc(100% - 2.25rem);margin-left:auto;position:absolute;top:2.25rem;left:0;right:0;overflow:auto}.verdict{font-weight:var(--pm-font-weight-bold);margin-bottom:var(--pm-space-1)}.verdict.is-ok{color:var(--pm-color-correct)}.verdict.is-ok:before{content:"✓ "}.verdict.is-bad{color:var(--pm-color-missing)}.verdict.is-bad:before{content:"− "}.player__verdict{font-weight:var(--pm-font-weight-bold);margin:0}.player__verdict:focus{outline:none}.figure-area{--stem-min:3rem;min-height:calc(var(--stem-min) + 4.5rem + 1.75rem * var(--pm-font-size-scale,1));gap:var(--pm-space-3);flex-direction:column;flex:1 1 0;display:flex}.figure-area--flow{flex:none;min-height:0}.figure-area__stem{min-height:var(--stem-min);flex:1 1 0;grid-template-columns:minmax(0,1fr);place-items:center;min-width:0;display:grid;overflow:hidden}.figure-area--flow .figure-area__stem{flex:none;min-height:0}.figure-area__frame{background:var(--pm-color-figure-bg);border:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-md);overflow:hidden}.figure-area__frame img{-webkit-user-select:none;user-select:none;-webkit-user-drag:none;width:100%;height:100%;display:block}.figure-area__stems{gap:var(--pm-space-3);justify-content:center;align-items:center;display:flex}.options{justify-content:center;align-items:flex-start;gap:var(--pm-space-2);padding-top:calc(var(--pm-lift-flap) + 2px);display:flex}.option{all:unset;box-sizing:border-box;min-width:0;max-width:min(var(--pm-size-card-max), 18dvh);align-items:stretch;gap:var(--pm-space-1);cursor:pointer;flex-direction:column;flex:1 1 0;display:flex}.option:focus-visible{outline:var(--pm-focus-width) solid var(--pm-color-ink);outline-offset:var(--pm-focus-offset);border-radius:var(--pm-radius-md)}.option:disabled{cursor:default}.option__card{border-radius:var(--pm-radius-md);background:var(--pm-color-figure-bg);width:100%;min-width:2.75rem;display:block;position:relative;overflow:hidden}.option__card img{object-fit:contain;width:100%;height:100%;display:block}.option__card:after{content:"";border-radius:inherit;border:var(--pm-stroke-figure) solid var(--pm-color-border-strong);pointer-events:none;position:absolute;inset:0}.option:hover:not(:disabled) .option__card:after{border-color:var(--pm-color-ink)}.option--text .option__card{min-height:3.25rem;padding:var(--pm-space-2) var(--pm-space-1);text-align:center;place-items:center;display:grid}.option__text{font-size:var(--pm-font-size-sm);font-weight:var(--pm-font-weight-semibold);overflow-wrap:anywhere}.option[data-selected][data-state=plain] .option__card{transform:translateY(calc(var(--pm-lift-flap) * -1))}.option[data-selected][data-state=plain] .option__card:after{border-width:var(--pm-stroke-emphasis);border-color:var(--pm-color-ink)}.option[data-state=correct] .option__card:after{border-width:var(--pm-stroke-emphasis);border-color:var(--pm-color-correct)}.option[data-state=wrong] .option__card:after{border-width:var(--pm-stroke-emphasis);border-color:var(--pm-color-missing);border-style:dashed}.option__badge{min-width:2.25rem;min-height:1.75rem;padding:0 var(--pm-space-2);border-radius:var(--pm-radius-sm);font-weight:var(--pm-font-weight-semibold);font-size:var(--pm-font-size-md);justify-content:center;align-self:center;align-items:center;display:flex}.option[data-struck] .option__letter{text-decoration:line-through;text-decoration-thickness:var(--pm-stroke-emphasis)}.option[data-struck][data-state=plain]:not([data-selected]) .option__card:after{border-style:dotted;border-color:var(--pm-color-ink-muted)}.option[data-state=correct] .option__badge{background:var(--pm-color-correct);color:var(--pm-color-on-correct)}.option[data-state=wrong] .option__badge{background:var(--pm-color-missing);color:var(--pm-color-on-missing)}@media (prefers-reduced-motion:no-preference){.option__card{transition:transform var(--pm-motion-duration-fast) var(--pm-motion-ease-out)}}@media (width<=251px){.options{flex-wrap:wrap}.option{flex:0 0 calc((100% - 2 * var(--pm-space-2)) / 3)}}.explanation{padding:var(--pm-space-4) var(--pm-space-5);background:var(--pm-color-surface);border:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-md)}.explanation__verdict{margin-bottom:var(--pm-space-3)}.explanation__verdict:focus,.player__pending:focus{outline:none}.explanation__verdict.is-ok{color:var(--pm-color-correct)}.explanation__verdict.is-ok:before{content:"✓ "}.explanation__verdict.is-bad{color:var(--pm-color-missing)}.explanation__verdict.is-bad:before{content:"− "}.explanation__ask+.explanation__ask{margin-top:var(--pm-space-4);padding-top:var(--pm-space-4);border-top:var(--pm-stroke-hairline) solid var(--pm-color-grid)}.reasons{padding-left:var(--pm-space-5);margin:0}.reasons li{margin-bottom:var(--pm-space-1)}.reasons__ok{color:var(--pm-color-correct)}.reasons__ok::marker{content:"✓ "}.reasons__bad{color:var(--pm-color-missing)}.reasons__bad::marker{content:"− "}.explanation__model{margin-top:var(--pm-space-4)}.model{background:var(--pm-color-sunken);border:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-md);height:min(22rem,60vw);min-height:15rem;position:relative;overflow:hidden}.model model-viewer{background:var(--pm-color-sunken);--poster-color:transparent}.model__note{padding:var(--pm-space-2) var(--pm-space-3);background:var(--pm-color-surface);margin:0;position:absolute;bottom:0;left:0;right:0}.summary__hero{text-align:center;padding:var(--pm-space-6) var(--pm-space-4);background:var(--pm-color-surface);border:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-md);position:relative;overflow:hidden}.summary__hero h1{font-size:var(--pm-font-size-2xl)}.summary__hero--celebrate{border:var(--pm-stroke-emphasis) solid var(--pm-color-ink)}.summary__score{font-size:var(--pm-font-size-xl);margin:var(--pm-space-2) 0}.summary__streak{align-items:center;gap:var(--pm-space-2);font-size:var(--pm-font-size-lg);font-weight:var(--pm-font-weight-bold);color:var(--pm-color-ink);display:inline-flex}.summary__streak svg{color:var(--pm-color-ink);font-size:1.5em}.levelup{align-items:center;gap:var(--pm-space-2);font-weight:var(--pm-font-weight-bold);color:var(--pm-color-ink);display:flex}.items{gap:var(--pm-space-2);margin:0;padding:0;list-style:none;display:grid}.items__row{align-items:center;gap:var(--pm-space-1) var(--pm-space-3);padding:var(--pm-space-2) var(--pm-space-3);background:var(--pm-color-surface);border:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-sm);flex-wrap:wrap;display:flex}.items__row>*{min-width:0}.items__row>.muted:first-child{flex:none;min-width:2rem}.items__row .tag{flex:none;margin:0}.items__row .btn{flex:none}.items__sub{flex:9rem}.items__row>.small{overflow-wrap:anywhere;flex:2 12rem}@media (width<=1023px){:root{--pm-space-gutter:var(--pm-space-3)}.shell{display:block}.app:has(.nav) .disclaimer{padding-bottom:calc(var(--pm-space-2) + 3.75rem + env(safe-area-inset-bottom))}.nav{z-index:var(--pm-z-bar);height:calc(3.75rem + env(safe-area-inset-bottom));padding:0 0 env(safe-area-inset-bottom);border-right:0;border-top:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);position:fixed;inset:auto 0 0}.nav__brand{display:none}.topbar__logo{flex:none;display:block}.topbar{row-gap:var(--pm-space-1);flex-wrap:wrap}.topbar .chip{white-space:nowrap;flex:none}.nav{display:block}.nav__list{grid-auto-columns:minmax(0,1fr);grid-auto-flow:column;gap:0;height:100%;display:grid}.nav__list>li{min-width:0}.nav__link{text-align:center;overflow-wrap:anywhere;border-radius:0;justify-content:center;height:100%;padding:0 2px;font-size:.8125rem}.nav__moreitem{display:block}.nav__morebtn{display:flex}.nav__secondary-wrap,.nav__account{display:none}.nav__settings{border-top:0;margin:0;padding:0}.nav--more-open .nav__secondary-wrap{z-index:var(--pm-z-overlay);left:0;right:0;bottom:calc(3.75rem + env(safe-area-inset-bottom));background:var(--pm-color-surface);border-top:var(--pm-stroke-figure) solid var(--pm-color-ink);display:block;position:fixed}.nav--more-open .nav__secondary{grid-template-columns:repeat(2,minmax(0,1fr));gap:0;display:grid}.nav--more-open .nav__secondary .nav__link{padding:0 var(--pm-space-4);font-size:var(--pm-font-size-md);border-bottom:var(--pm-stroke-hairline) solid var(--pm-color-grid);justify-content:flex-start}.topbar{padding:var(--pm-space-2) var(--pm-space-gutter)}.content{padding:var(--pm-space-2) var(--pm-space-gutter) var(--pm-space-6)}.levels__row{gap:var(--pm-space-2);grid-template-columns:minmax(0,1fr)}.card{padding:var(--pm-space-4)}.group{padding:var(--pm-space-3) var(--pm-space-4)}.subtypes{margin-left:var(--pm-space-3)}.chips legend{float:none;width:auto}.btn--lg{padding:0 var(--pm-space-4)}.player__prompt{font-size:var(--pm-font-size-md)}.player__hint{display:none}}@media (width<=900px){.table--stack thead{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}.table--stack,.table--stack tbody,.table--stack tr,.table--stack td{width:100%;display:block}.table--stack tr{padding:var(--pm-space-2) var(--pm-space-3);border-bottom:var(--pm-stroke-hairline) solid var(--pm-color-grid)}.table--stack td{justify-content:space-between;gap:var(--pm-space-3);padding:var(--pm-space-1) 0;border:0;display:flex}.table--stack td[data-label]:before{content:attr(data-label);color:var(--pm-color-ink-muted);font-size:var(--pm-font-size-sm);flex:none}.table--stack td>:last-child{text-align:right}}@media (height<=479px){.focus__bar{min-height:2.25rem;padding-block:0}.session>.bar{display:none}.disclaimer{padding:var(--pm-space-1) var(--pm-space-gutter);line-height:1.25}.qscreen{gap:var(--pm-space-1);min-height:12rem}.player__prompt{font-size:var(--pm-font-size-sm)}.figure-area{gap:var(--pm-space-1);--stem-min:3rem}.options{padding-top:calc(var(--pm-lift-flap) + 1px)}.option{max-width:min(var(--pm-size-card-max), 15dvh)}.player__actions .btn{min-height:2.25rem}.player__hint{display:none}}@media (height<=479px) and (width>=560px){.qscreen{column-gap:var(--pm-space-4);grid-template-rows:auto auto auto 1fr auto auto;grid-template-columns:minmax(0,1fr) 15rem;align-content:start;display:grid}.qscreen>.figure-area{grid-area:1/1/-1}.qscreen>:not(.figure-area):not(.player__pop){grid-column:2}.qscreen>.player__actions{align-self:end}}.linklike{color:var(--pm-color-ink);cursor:pointer;background:0 0;border:0;min-height:2.25rem;padding:0;text-decoration:underline}.report{margin:var(--pm-space-3) 0 0}.report--form{padding:var(--pm-space-3) var(--pm-space-4);border:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-sm);background:var(--pm-color-sunken);max-width:32rem}.report fieldset legend{margin-bottom:var(--pm-space-1);font-weight:var(--pm-font-weight-semibold)}textarea{width:100%;padding:var(--pm-space-2) var(--pm-space-3);border:var(--pm-stroke-figure) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-md);background:var(--pm-color-surface);resize:vertical}.report fieldset .check{display:flex}.exam{gap:var(--pm-space-3);flex-direction:column;display:flex}.exam__pos{font-weight:var(--pm-font-weight-semibold);color:var(--pm-color-ink);flex:8rem;min-width:0}.exam__clock{font-size:var(--pm-font-size-xl);font-weight:var(--pm-font-weight-bold);font-feature-settings:var(--pm-font-tabular);font-variant-numeric:tabular-nums lining-nums}.exam__clock.is-low{text-decoration:underline;text-decoration-thickness:var(--pm-stroke-emphasis);text-underline-offset:.2em}.exam__controls{gap:var(--pm-space-2);flex-wrap:wrap;display:flex}.btn.is-marked,.exam__controls .btn.is-marked{background:var(--pm-color-sunken);border-style:dashed}.exam__review h3{margin:var(--pm-space-3) 0 var(--pm-space-2);font-size:var(--pm-font-size-md)}.exam__counts{font-weight:var(--pm-font-weight-semibold)}.exam__grid{gap:var(--pm-space-2);flex-wrap:wrap;margin:0;padding:0;list-style:none;display:flex}.exam__num{min-width:var(--pm-size-tap);min-height:var(--pm-size-tap);padding:0 var(--pm-space-2);border:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-sm);background:var(--pm-color-surface);cursor:pointer;font-feature-settings:var(--pm-font-tabular);font-variant-numeric:tabular-nums lining-nums}.exam__num.is-answered{background:var(--pm-color-sunken);font-weight:var(--pm-font-weight-bold)}.exam__num.is-marked{box-shadow:inset 0 -3px 0 var(--pm-color-ink)}.exam__num.is-here{outline:var(--pm-focus-width) solid var(--pm-color-ink);outline-offset:1px}.exam__confirm{margin-top:var(--pm-space-3)}.exam__detail{padding-top:var(--pm-space-3);border-top:var(--pm-stroke-hairline) solid var(--pm-color-grid);flex:1 0 100%}.game{gap:var(--pm-space-3)}.game__bar{justify-content:space-between;align-items:baseline;gap:var(--pm-space-3);z-index:var(--pm-z-bar);padding:var(--pm-space-2) 0;background:var(--pm-color-paper);flex-wrap:wrap;display:flex;position:sticky;top:0}.game__title{font-weight:var(--pm-font-weight-semibold)}.game__status{font-feature-settings:var(--pm-font-tabular);font-variant-numeric:tabular-nums lining-nums}.game__verdict{font-size:var(--pm-font-size-lg);font-weight:var(--pm-font-weight-bold);margin:0}.game__verdict.is-ok{color:var(--pm-color-correct)}.game__verdict.is-bad{color:var(--pm-color-missing)}.game__after{gap:var(--pm-space-3);flex-direction:column;display:flex}.lessons{margin:0 0 var(--pm-space-4);gap:var(--pm-space-2);padding:0;list-style:none;display:grid}.lessons__row{background:var(--pm-color-surface);border:var(--pm-stroke-hairline) solid var(--pm-color-border-strong);border-radius:var(--pm-radius-sm);padding:var(--pm-space-3) var(--pm-space-4)}.lessons__link{justify-content:space-between;gap:var(--pm-space-2);color:var(--pm-color-ink);font-weight:var(--pm-font-weight-semibold);min-height:var(--pm-size-tap);flex-wrap:wrap;align-items:center;text-decoration:none;display:flex}.lessons__link:hover .lessons__title{text-decoration:underline}.lessons__summary{margin:0}.lessons__done{color:var(--pm-color-ink);font-weight:var(--pm-font-weight-semibold)}.lesson__text 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