/*! tailwindcss v4.3.3 | MIT License | https://tailwindcss.com */
@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after{--tw-translate-x:0;--tw-translate-y:0;--tw-translate-z:0;--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-space-y-reverse:0;--tw-border-style:solid;--tw-leading:initial;--tw-font-weight:initial;--tw-tracking:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}::backdrop{--tw-translate-x:0;--tw-translate-y:0;--tw-translate-z:0;--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-space-y-reverse:0;--tw-border-style:solid;--tw-leading:initial;--tw-font-weight:initial;--tw-tracking:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}}}@layer theme{:root,:host{--font-sans:"Lexend", system-ui, -apple-system, "Segoe UI", sans-serif;--font-mono:"DM Mono", ui-monospace, Menlo, monospace;--color-red-50:#fef2f2;--color-red-200:#ffcaca;--color-red-700:#bf000f;--color-red-800:#9f0712;--color-amber-50:#fff8e1;--color-amber-100:#fff3cc;--color-amber-300:#ffd236;--color-emerald-100:#dbf5ea;--color-sky-600:#0084cc;--color-blue-600:#155dfc;--color-indigo-50:#eef2ff;--color-indigo-100:#e0e7ff;--color-slate-50:#fbfaf7;--color-slate-100:#f5f3ee;--color-slate-200:#ece8e0;--color-slate-300:#ddd7cc;--color-slate-400:#a9aebd;--color-slate-500:#646b80;--color-slate-600:#555c72;--color-slate-700:#3a4259;--color-slate-900:#1a2138;--color-white:#fff;--spacing:.25rem;--container-xs:20rem;--container-sm:24rem;--container-md:28rem;--container-lg:32rem;--container-3xl:48rem;--container-6xl:72rem;--container-7xl:80rem;--text-xs:.75rem;--text-xs--line-height:calc(1 / .75);--text-sm:.875rem;--text-sm--line-height:calc(1.25 / .875);--text-base:1rem;--text-base--line-height:calc(1.5 / 1);--text-lg:1.125rem;--text-lg--line-height:calc(1.75 / 1.125);--text-2xl:1.5rem;--text-2xl--line-height:calc(2 / 1.5);--font-weight-normal:400;--font-weight-medium:500;--font-weight-semibold:600;--tracking-tight:-.025em;--tracking-wide:.025em;--leading-relaxed:1.625;--leading-loose:2;--radius-sm:.25rem;--radius-md:.375rem;--radius-lg:.5rem;--radius-xl:.75rem;--radius-2xl:1rem;--shadow-xs:0 1px 2px 0 #0000000d;--shadow-sm:0 1px 3px 0 #0000001a, 0 1px 2px -1px #0000001a;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--ease-out:cubic-bezier(0, 0, .2, 1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}@supports (color:color(display-p3 0 0 0)){:root,:host{--color-red-50:color(display-p3 .988669 .951204 .950419);--color-red-200:color(display-p3 .969562 .798149 .794299);--color-red-700:color(display-p3 .692737 .116232 .104679);--color-red-800:color(display-p3 .569606 .121069 .108493);--color-amber-300:color(display-p3 .974327 .83063 .33298);--color-sky-600:color(display-p3 .162505 .509376 .796082);--color-blue-600:color(display-p3 .174493 .358974 .950247);--color-indigo-50:color(display-p3 .936215 .948621 .995621);--color-indigo-100:color(display-p3 .883035 .90499 .993138)}}@supports (color:lab(0% 0 0)){:root,:host{--color-red-50:lab(96.5005% 4.18508 1.52328);--color-red-200:lab(86.017% 19.8815 7.75869);--color-red-700:lab(40.4273% 67.2623 53.7441);--color-red-800:lab(33.7174% 55.8993 41.0293);--color-amber-300:lab(86.4156% 6.13147 78.3961);--color-sky-600:lab(51.7754% -11.4712 -49.8349);--color-blue-600:lab(44.0605% 29.0279 -86.0352);--color-indigo-50:lab(95.4818% .411302 -6.78529);--color-indigo-100:lab(91.6577% 1.04591 -12.7199)}}}@layer base{*,:after,:before{box-sizing:border-box;border:0 solid;margin:0;padding:0}::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::-webkit-file-upload-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;-moz-tab-size:4;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::-webkit-file-upload-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:-webkit-any([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:-webkit-any([multiple],[size])) optgroup option{padding-inline-start:20px}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::-webkit-file-upload-button{margin-inline-end:4px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block-start:0;padding-block-end:0}::-webkit-datetime-edit-year-field{padding-block-start:0;padding-block-end:0}::-webkit-datetime-edit-month-field{padding-block-start:0;padding-block-end:0}::-webkit-datetime-edit-day-field{padding-block-start:0;padding-block-end:0}::-webkit-datetime-edit-hour-field{padding-block-start:0;padding-block-end:0}::-webkit-datetime-edit-minute-field{padding-block-start:0;padding-block-end:0}::-webkit-datetime-edit-second-field{padding-block-start:0;padding-block-end:0}::-webkit-datetime-edit-millisecond-field{padding-block-start:0;padding-block-end:0}::-webkit-datetime-edit-meridiem-field{padding-block-start:0;padding-block-end:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button{-webkit-appearance:button;appearance:button}input:where([type=button],[type=reset],[type=submit]){-webkit-appearance:button;appearance:button}::-webkit-file-upload-button{-webkit-appearance:button;appearance:button}::file-selector-button{-webkit-appearance:button;appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}*,:before,:after{border-color:var(--sand-300)}::backdrop{border-color:var(--sand-300)}::-webkit-file-upload-button{border-color:var(--sand-300)}::file-selector-button{border-color:var(--sand-300)}html{font-family:var(--font-text)}body{-webkit-font-smoothing:antialiased}h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink-900);letter-spacing:-.015em}code,kbd,samp{font-family:var(--font-code)}:focus-visible{outline:3px solid var(--blue-500);outline-offset:3px}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}}button,select,textarea,summary,input:not([type=hidden]),[role=button],[role=option],[role=checkbox],[role=radio],[role=switch],[role=tab]{min-block-size:24px;min-inline-size:24px}@media (forced-colors:active){[aria-pressed=true],[aria-selected=true],[aria-checked=true]{outline-offset:1px;forced-color-adjust:auto;outline:3px solid highlight}:focus-visible{outline-offset:2px;outline:3px solid highlight}button,select,textarea,input,[role=option]{border:1px solid buttonborder}}}@layer components{body{background:var(--sand-50);color:var(--ink-700);line-height:1.6}main{overflow-x:clip}.page{max-inline-size:55rem;margin-inline-start:auto;margin-inline-end:auto;padding:2rem 1rem 4rem}.page-wide{max-inline-size:70rem;margin-inline-start:auto;margin-inline-end:auto;padding:2rem 1rem 4rem}@media (min-width:640px){.page,.page-wide{padding-inline-start:1.5rem;padding-inline-end:1.5rem}}.page-crumb{color:var(--ink-500);align-items:center;gap:.375rem;font-size:.875rem;font-weight:500;display:inline-flex}.page-crumb a{color:inherit;text-decoration:none}.page-crumb a:before{content:"← "}[dir=rtl] .page-crumb a:before{content:"→ "}.page-crumb a:hover{color:var(--ink-900);text-underline-offset:3px;text-decoration:underline}.page-title{font-family:var(--font-display);letter-spacing:-.025em;color:var(--ink-900);text-wrap:balance;font-size:clamp(2rem,4vw,2.5rem);font-weight:800;line-height:1.1}.page-lede{color:var(--ink-500);text-wrap:pretty;max-inline-size:56ch;margin-block-start:.75rem;font-size:1.0625rem}.section-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:.5rem 1.5rem;margin-block-start:3.5rem;margin-block-end:1.25rem;display:flex}.section-head .section-title{margin-block-start:0}.section-title{font-family:var(--font-display);letter-spacing:-.02em;color:var(--ink-900);margin-block-start:3.5rem;font-size:1.625rem;font-weight:700}.section-note{color:var(--ink-500);max-inline-size:60ch;margin-block-start:.375rem;font-size:.9375rem}.stack-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,15rem),1fr));gap:1rem;display:grid}.tile-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,16rem),1fr));gap:1.25rem;display:grid}.card{background:var(--white);border:1px solid var(--sand-200);border-radius:var(--radius-lg);box-shadow:var(--shadow-xs);transition:transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);padding:1.5rem;position:relative}.card+.card{margin-block-start:1rem}:-webkit-any(.grid,.stack-grid,.tile-grid,.outcome-grid)>.card+.card{margin-block-start:0}:is(.grid,.stack-grid,.tile-grid,.outcome-grid)>.card+.card{margin-block-start:0}.card-interactive:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.card-current{border-color:var(--blue-300);box-shadow:0 0 0 4px var(--blue-100), var(--shadow-sm)}.card-head{justify-content:space-between;align-items:flex-start;gap:.75rem;display:flex}.card-title{font-family:var(--font-display);letter-spacing:-.015em;color:var(--ink-900);text-wrap:pretty;font-size:1.25rem;font-weight:700;line-height:1.25}.card-title a{color:inherit;text-decoration:none}.card-title a:hover{text-underline-offset:3px;text-decoration:underline}.course-card-heading{align-items:center;gap:.875rem;min-inline-size:0;display:flex}.course-card-mark{background:var(--tone-100);block-size:2.75rem;inline-size:2.75rem;color:var(--tone-700);font-family:var(--font-display);border-radius:14px;flex:none;place-items:center;font-size:1.25rem;font-weight:800;display:grid}.card-eyebrow{color:var(--ink-500);font-size:.8125rem;font-weight:600}.card-eyebrow.tone-text{color:var(--tone-700)}.learner-hero{isolation:isolate;border-radius:var(--radius-xl);background:var(--tone-band);padding:clamp(1.75rem,5vw,3.5rem);position:relative;overflow:hidden}.learner-hero:before,.learner-hero:after,.soft-shapes:before,.soft-shapes:after{content:"";z-index:-1;pointer-events:none;border-radius:999px;position:absolute}.learner-hero:before{background:var(--tone-100);opacity:.9;block-size:340px;inline-size:340px;top:-140px}.learner-hero:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{right:-90px}.learner-hero:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{right:-90px}.learner-hero:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{left:-90px}.learner-hero:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{left:-90px}.learner-hero:after{border:10px solid var(--tone-ring);opacity:.7;block-size:90px;inline-size:90px;bottom:30px}.learner-hero:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{right:40px}.learner-hero:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{right:40px}.learner-hero:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{left:40px}.learner-hero:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{left:40px}.learner-hero>.hero-accent{z-index:-1;background:var(--sun-100);opacity:.85;pointer-events:none;border-radius:999px;block-size:160px;inline-size:160px;position:absolute;bottom:-90px}.learner-hero>.hero-accent:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){right:140px}.learner-hero>.hero-accent:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){right:140px}.learner-hero>.hero-accent:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){left:140px}.learner-hero>.hero-accent:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){left:140px}.learner-hero.tone-sun>.hero-accent{background:var(--coral-100)}.learner-hero.tone-mint>.hero-accent,.learner-hero.tone-sky>.hero-accent{background:var(--sun-100)}.learner-hero .page-lede,.hero-lede{color:var(--ink-700);max-inline-size:52ch;font-size:1.125rem}.hero-grid{align-items:center;gap:2rem;display:grid}@media (min-width:768px){.hero-grid{grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr)}}.hero-eyebrow{color:var(--ink-700);background:#ffffffbf;border-radius:999px;align-items:center;gap:.5rem;padding:.375rem .875rem;font-size:.8125rem;font-weight:600;display:inline-flex}.hero-title{font-family:var(--font-display);letter-spacing:-.025em;color:var(--ink-900);text-wrap:balance;max-inline-size:18ch;margin-block-start:1rem;font-size:clamp(2rem,4vw,2.75rem);font-weight:800;line-height:1.06}.hero-title-lg{font-size:clamp(2.25rem,5vw,3.5rem)}.hero-art{place-items:center;display:grid}.hero-note{color:var(--ink-500);margin-block-start:.875rem;font-size:.875rem}.hero-panel{background:var(--white);box-shadow:var(--shadow-md);text-align:center;border-radius:24px;padding:1.5rem}.letter-tile{background:var(--tone-400);block-size:9.5rem;inline-size:9.5rem;color:var(--tone-on);font-family:var(--font-display);box-shadow:var(--shadow-md);border-radius:44px;place-items:center;font-size:5rem;font-weight:800;line-height:1;display:grid;transform:rotate(-6deg)}.soft-shapes{isolation:isolate;position:relative;overflow:hidden}.soft-shapes:before{background:var(--tone-100);opacity:.9;block-size:260px;inline-size:260px;top:-120px}.soft-shapes:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{left:-80px}.soft-shapes:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{left:-80px}.soft-shapes:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{right:-80px}.soft-shapes:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{right:-80px}.soft-shapes:after{border:10px solid var(--tone-ring);opacity:.7;block-size:90px;inline-size:90px;top:24px}.soft-shapes:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{left:38%}.soft-shapes:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{left:38%}.soft-shapes:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{right:38%}.soft-shapes:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{right:38%}.subject-tile{background:var(--white);border:1px solid var(--sand-200);box-shadow:var(--shadow-xs);transition:transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);border-radius:24px;flex-direction:column;display:flex;overflow:hidden}.subject-tile:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}.subject-tile-band{background:var(--tone-100);isolation:isolate;place-items:center;block-size:148px;display:grid;position:relative;overflow:hidden}.subject-tile-band:before{content:"";z-index:-1;background:#ffffff73;border-radius:999px;block-size:260px;inline-size:260px;position:absolute;top:-120px}.subject-tile-band:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{left:-80px}.subject-tile-band:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{left:-80px}.subject-tile-band:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{right:-80px}.subject-tile-band:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{right:-80px}.subject-tile-band:after{content:"";z-index:-1;border:10px solid #ffffff80;border-radius:999px;block-size:90px;inline-size:90px;position:absolute;top:24px}.subject-tile-band:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{left:38%}.subject-tile-band:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{left:38%}.subject-tile-band:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{right:38%}.subject-tile-band:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{right:38%}.subject-tile-letter{background:var(--tone-400);block-size:76px;inline-size:76px;color:var(--tone-on);font-family:var(--font-display);transition:transform var(--dur-base) var(--ease-out);box-shadow:var(--shadow-sm);border-radius:24px;place-items:center;font-size:2.25rem;font-weight:800;display:grid;transform:rotate(-3deg)}.subject-tile:hover .subject-tile-letter{transform:rotate(-6deg)scale(1.04)}.subject-tile-status{background:var(--white);color:var(--tone-700);box-shadow:var(--shadow-xs);border-radius:999px;padding:.25rem .75rem;font-size:.8125rem;font-weight:600;position:absolute;top:14px}.subject-tile-status:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){left:14px}.subject-tile-status:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){left:14px}.subject-tile-status:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){right:14px}.subject-tile-status:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){right:14px}.subject-tile-body{flex-direction:column;flex:1;padding:1.25rem 1.375rem 1.375rem;display:flex}.subject-tile-title{font-family:var(--font-display);letter-spacing:-.015em;color:var(--ink-900);font-size:1.375rem;font-weight:700}.subject-tile-title a{color:inherit;text-decoration:none}.subject-tile-title a:after{content:"";position:absolute;top:0;bottom:0;left:0;right:0}.subject-tile{position:relative}.subject-tile .btn-row,.subject-tile .btn{z-index:1;position:relative}.subject-tile-description{color:var(--ink-700);margin-block-start:.375rem;font-size:.9375rem;line-height:1.55}.subject-tile-meta{color:var(--tone-700);margin-block-start:.625rem;font-size:.8125rem;font-weight:600}.subject-tile-actions{margin-block-start:auto;padding-block-start:1.125rem}.big-stat{flex-direction:column;gap:2px;display:flex}.big-stat-value{font-family:var(--font-display);letter-spacing:-.03em;color:var(--tone-700);font-variant-numeric:tabular-nums;font-size:2.5rem;font-weight:800;line-height:1}.tone-blue .big-stat-value,.big-stat.tone-blue .big-stat-value{color:var(--blue-600)}.big-stat-label{color:var(--ink-500);font-size:.875rem}.stat-row{flex-wrap:wrap;gap:1.5rem 3rem;margin-block-start:1.75rem;display:flex}.step-number{font-family:var(--font-display);color:var(--tone-400);font-size:3rem;font-weight:800;line-height:1}.progress-ring{--size:8rem;--stroke:12px;--p:0;inline-size:var(--size);block-size:var(--size);background:conic-gradient(var(--tone-400) calc(var(--p) * 1%), var(--sand-200) 0);border-radius:999px;place-items:center;display:grid;position:relative}.progress-ring.is-done{background:conic-gradient(var(--mint-400) 100%, var(--sand-200) 0)}.progress-ring:before{content:"";inset:var(--stroke);background:var(--white);border-radius:999px;position:absolute}.progress-ring>*{position:relative}.progress-ring-value{font-family:var(--font-display);font-weight:800;font-size:calc(var(--size) * .26);color:var(--ink-900);font-variant-numeric:tabular-nums;text-align:center;line-height:1}.progress-ring-of{font-family:var(--font-text);color:var(--ink-500);margin-block-start:.25rem;font-size:.75rem;font-weight:400;display:block}.progress-ring-caption{color:var(--ink-700);text-align:center;margin-block-start:.625rem;font-size:.8125rem;font-weight:600}.notice{border-radius:var(--radius-md);background:var(--sand-100);color:var(--ink-500);padding:1.125rem 1.25rem;font-size:.8125rem;line-height:1.6}.notice-title{color:var(--ink-700);margin-block-end:.25rem;font-weight:600}.btn{min-block-size:2.75rem;font-family:var(--font-text);text-align:center;text-wrap:balance;cursor:pointer;transition:background var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast), color var(--dur-fast);border:1.5px solid #0000;border-radius:999px;justify-content:center;align-items:center;gap:.5rem;padding:0 1.25rem;font-size:.9375rem;font-weight:600;line-height:1.2;text-decoration:none;display:inline-flex}.btn:active:not(:disabled){transform:translateY(1px)scale(.985)}.btn:disabled,.btn[aria-disabled=true]{opacity:.45;cursor:not-allowed;box-shadow:none}.btn-sm{min-block-size:2.25rem;padding-inline-start:.875rem;padding-inline-end:.875rem;font-size:.875rem}.btn-lg{min-block-size:3.25rem;padding-inline-start:1.75rem;padding-inline-end:1.75rem;font-size:1.0625rem}.btn-full{inline-size:100%}.btn-primary{background:var(--blue-500);color:var(--white);box-shadow:var(--shadow-button)}.btn-primary:hover:not(:disabled){background:var(--blue-600);color:var(--white)}.btn-secondary{background:var(--white);color:var(--ink-900);border-color:var(--sand-300)}.btn-secondary:hover:not(:disabled){background:var(--blue-50);border-color:var(--blue-400);color:var(--blue-700)}.btn-soft{background:var(--blue-100);color:var(--blue-700)}.btn-soft:hover:not(:disabled){background:var(--blue-200)}.btn-quiet{color:var(--blue-600);background:0 0;padding-inline-start:.875rem;padding-inline-end:.875rem}.btn-quiet:hover:not(:disabled){background:var(--blue-50);color:var(--blue-700)}.btn-sun{background:var(--sun-400);color:var(--ink-900);box-shadow:var(--shadow-button)}.btn-sun:hover:not(:disabled){background:#ffbe1a}.btn-row{flex-wrap:wrap;align-items:center;gap:.625rem;display:flex}.link{color:var(--blue-600);text-decoration:underline;text-decoration-thickness:1.5px;-webkit-text-decoration-color:var(--blue-300);-webkit-text-decoration-color:var(--blue-300);-webkit-text-decoration-color:var(--blue-300);text-decoration-color:var(--blue-300);text-underline-offset:3px;cursor:pointer;font-weight:500}.link:hover{color:var(--blue-700);text-decoration-thickness:2px}.link-muted{color:var(--ink-500);-webkit-text-decoration-color:var(--sand-400);-webkit-text-decoration-color:var(--sand-400);-webkit-text-decoration-color:var(--sand-400);text-decoration-color:var(--sand-400)}.link-muted:hover{color:var(--ink-900)}.field{display:block}.field-label{color:var(--ink-900);margin-block-end:.5rem;font-size:.875rem;font-weight:600;display:block}.field-help{color:var(--ink-500);margin-block-start:.375rem;font-size:.8125rem;font-weight:400;display:block}.field .errorlist,.errorlist{color:var(--danger-700);margin-block-start:.375rem;padding:0;font-size:.8125rem;font-weight:500;list-style:none}.form-group-title{letter-spacing:.06em;text-transform:uppercase;color:var(--ink-500);margin-block-start:.5rem;margin-block-end:-.25rem;font-size:.75rem;font-weight:600}.form-grid-2{grid-template-columns:repeat(auto-fit,minmax(min(100%,10rem),1fr));gap:.875rem;display:grid}.form-stack{flex-direction:column;gap:1.125rem;display:flex}.form-control{border:1.5px solid var(--sand-300);border-radius:var(--radius-sm);background:var(--white);min-block-size:3rem;inline-size:100%;color:var(--ink-900);font-family:var(--font-text);transition:border-color var(--dur-fast), box-shadow var(--dur-fast);padding:.625rem .875rem;font-size:1rem}.field :where(input:not([type=checkbox]):not([type=radio]):not([type=hidden]),select,textarea){border:1.5px solid var(--sand-300);border-radius:var(--radius-sm);background:var(--white);min-block-size:3rem;inline-size:100%;color:var(--ink-900);font-family:var(--font-text);transition:border-color var(--dur-fast), box-shadow var(--dur-fast);padding:.625rem .875rem;font-size:1rem}.form-control:focus{border-color:var(--blue-500);box-shadow:var(--shadow-focus);outline:none}.field :where(input,select,textarea):focus{border-color:var(--blue-500);box-shadow:var(--shadow-focus);outline:none}.form-control-lg{min-block-size:3.5rem;box-shadow:var(--shadow-sm);border-radius:999px;padding-inline-start:1.5rem;padding-inline-end:1.5rem;font-size:1.0625rem}select.form-control{-webkit-appearance:none;appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5' fill='none' stroke='%23646b80' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-position:right 1rem center;background-repeat:no-repeat;padding-inline-end:2.5rem}.field :where(select){-webkit-appearance:none;appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5' fill='none' stroke='%23646b80' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-position:right 1rem center;background-repeat:no-repeat;padding-inline-end:2.5rem}[dir=rtl] select.form-control,[dir=rtl] .field select{background-position:1rem}.field-code input{font-family:var(--font-code);letter-spacing:.08em;text-transform:uppercase;font-size:1.125rem}.field-pin input{letter-spacing:.3em;font-size:1.25rem}.check{color:var(--ink-700);cursor:pointer;align-items:flex-start;gap:.75rem;font-size:.9375rem;line-height:1.5;display:flex}.check input[type=checkbox],input[type=checkbox].check-input{-webkit-appearance:none;appearance:none;border:1.5px solid var(--sand-400);background:var(--white);cursor:pointer;block-size:24px;inline-size:24px;transition:background var(--dur-fast), border-color var(--dur-fast);border-radius:8px;flex:none;place-items:center;margin-block-start:1px;display:grid}.check input[type=checkbox]:after,input[type=checkbox].check-input:after{content:"✓";color:var(--white);opacity:0;font-size:14px;font-weight:700;line-height:1}.check input[type=checkbox]:checked,input[type=checkbox].check-input:checked{background:var(--blue-500);border-color:var(--blue-500)}.check input[type=checkbox]:checked:after,input[type=checkbox].check-input:checked:after{opacity:1}.check-group{border:1px solid var(--sand-200);background:var(--sand-50);border-radius:18px;flex-direction:column;gap:.875rem;padding:1.125rem;display:flex}.divider-or{color:var(--ink-500);align-items:center;gap:.75rem;margin-block-start:1.5rem;margin-block-end:1.5rem;font-size:.8125rem;display:flex}.divider-or:before,.divider-or:after{content:"";background:var(--sand-200);flex:1;block-size:1px}.filter-pill{border:1.5px solid var(--sand-300);background:var(--white);min-block-size:2.375rem;color:var(--ink-700);cursor:pointer;border-radius:999px;align-items:center;padding-inline-start:1rem;padding-inline-end:1rem;font-size:.875rem;font-weight:500;text-decoration:none;display:inline-flex}.filter-pill:hover{border-color:var(--ink-500)}.filter-pill[aria-pressed=true],.filter-pill[aria-current=true]{border-color:var(--ink-900);background:var(--ink-900);color:var(--white)}.search-pill{max-inline-size:37.5rem;position:relative}.search-pill .form-control{padding-inline-end:7.5rem}.search-pill .btn{min-block-size:2.75rem;position:absolute;top:6px}.search-pill .btn:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){right:6px}.search-pill .btn:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){right:6px}.search-pill .btn:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){left:6px}.search-pill .btn:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){left:6px}.badge{white-space:nowrap;background:var(--sand-100);color:var(--ink-500);border-radius:999px;align-items:center;gap:.375rem;padding:.25rem .75rem;font-size:.8125rem;font-weight:600;line-height:1.4;display:inline-flex}.badge:before{content:"";opacity:.8;background:currentColor;border-radius:999px;block-size:7px;inline-size:7px}.badge-done{background:var(--mint-100);color:var(--mint-700)}.badge-current{background:var(--blue-100);color:var(--blue-700)}.badge-muted{background:var(--sand-100);color:var(--ink-500)}.badge-attention{background:var(--sun-100);color:var(--sun-700)}.badge-tone{background:var(--tone-100);color:var(--tone-700)}.status-pill{background:var(--sand-100);color:var(--ink-500);border-radius:8px;align-items:center;padding:.1875rem .625rem;font-size:.8125rem;font-weight:600;display:inline-flex}.status-pill[data-status=verified]{background:var(--mint-100);color:var(--mint-700)}.status-pill[data-status=mastered]{background:var(--sky-100);color:var(--sky-700)}.status-pill[data-status=needs_review]{background:var(--sun-100);color:var(--sun-700)}.status-pill[data-status=learning]{background:var(--blue-100);color:var(--blue-700)}.meter{background:var(--sand-200);border-radius:999px;block-size:10px;overflow:hidden}.meter>span{background:var(--tone-400);border-radius:inherit;block-size:100%;min-inline-size:4px;transition:inline-size .4s var(--ease-out);display:block}.meter-done>span{background:var(--mint-400)}.meter-label{color:var(--ink-500);font-size:.8125rem}.meter-label strong{color:var(--ink-900);font-weight:600}.key-facts{flex-wrap:wrap;gap:.5rem;margin-block-start:1.25rem;display:flex}.key-facts>span{border:1px solid var(--sand-200);color:var(--ink-700);background:#fffc;border-radius:999px;align-items:center;gap:.5rem;padding:.375rem .875rem;font-size:.875rem;font-weight:500;display:inline-flex}.key-facts>span:before{content:"";background:var(--tone-400);border-radius:999px;block-size:8px;inline-size:8px}.list-surface{border:1px solid var(--sand-200);border-radius:var(--radius-lg);background:var(--white);box-shadow:var(--shadow-xs);padding:0;list-style:none;overflow:hidden}.list-surface>*+*{border-block-start:1px solid var(--sand-200)}.list-row{color:var(--ink-900);transition:background var(--dur-fast);align-items:center;gap:1rem;padding:1rem 1.25rem;text-decoration:none;display:flex}a.list-row:after{content:"→";color:var(--ink-300);transition:transform var(--dur-fast), color var(--dur-fast);margin-inline-start:auto;font-size:1.125rem}[dir=rtl] a.list-row:after{content:"←"}a.list-row:hover{background:var(--sand-50)}a.list-row:hover:after{color:var(--blue-500);transform:translate(2px)}[dir=rtl] a.list-row:hover:after{transform:translate(-2px)}.list-row-title{flex:1;min-inline-size:0;font-weight:500}.list-row-meta{color:var(--ink-500);margin-block-start:2px;font-size:.8125rem;font-weight:400;display:block}.list-row-index{background:var(--sand-100);block-size:2.25rem;inline-size:2.25rem;color:var(--ink-500);font-family:var(--font-display);font-variant-numeric:tabular-nums;border-radius:999px;flex:none;place-items:center;font-size:.9375rem;font-weight:700;display:grid}.list-row-index[data-status=done]{background:var(--mint-400);color:var(--white)}.list-row-index[data-status=current]{background:var(--blue-500);color:var(--white);box-shadow:0 0 0 4px var(--blue-100)}.outcome-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,15rem),1fr));gap:.75rem;padding:0;list-style:none;display:grid}.outcome{background:var(--white);border:1px solid var(--sand-200);color:var(--ink-900);border-radius:18px;align-items:flex-start;gap:.875rem;padding:1rem 1.125rem;line-height:1.5;display:flex}.outcome:before{content:"✓";background:var(--mint-100);block-size:28px;inline-size:28px;color:var(--mint-700);border-radius:999px;flex:none;place-items:center;font-size:14px;font-weight:700;display:grid}.outcome code{color:var(--ink-500);font-size:.75rem;display:block}.flash{background:var(--mint-100);color:var(--mint-700);border-radius:14px;align-items:center;gap:.625rem;padding:.75rem 1rem;font-size:.9375rem;font-weight:500;display:flex}.flash:before{content:"✓";background:var(--mint-400);block-size:22px;inline-size:22px;color:var(--white);border-radius:999px;flex:none;place-items:center;font-size:13px;font-weight:700;display:grid}.flash-error{background:var(--danger-100);color:var(--danger-700)}.flash-error:before{content:"!";background:var(--danger-500)}.flash-attention{background:var(--sun-100);color:var(--sun-700)}.flash-attention:before{content:"!";background:var(--sun-400);color:var(--ink-900)}.empty{border:2px dashed var(--sand-300);border-radius:var(--radius-lg);text-align:center;color:var(--ink-500);background:var(--sand-100);padding:2.5rem 1.5rem}.empty-title{font-family:var(--font-display);color:var(--ink-900);margin-block-end:.375rem;font-size:1.25rem;font-weight:700}.level-path{margin:0;padding:0;list-style:none;position:relative}.level-path:before{content:"";background:var(--sand-200);border-radius:4px;inline-size:4px;position:absolute;top:28px;bottom:28px}.level-path:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{left:27px}.level-path:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{left:27px}.level-path:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{right:27px}.level-path:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{right:27px}.level-path>li{grid-template-columns:58px minmax(0,1fr);gap:1.25rem;margin-block-end:1rem;display:grid;position:relative}.level-node{z-index:1;border:2px solid var(--sand-300);background:var(--white);block-size:58px;inline-size:58px;color:var(--ink-500);font-family:var(--font-display);border-radius:999px;place-items:center;font-size:1.125rem;font-weight:800;display:grid;position:relative}.level-node[data-status=completed]{border-color:var(--mint-400);background:var(--mint-400);color:var(--white)}.level-node[data-status=enrolled]{border-color:var(--tone-400);background:var(--tone-400);color:var(--tone-on);box-shadow:0 0 0 6px var(--tone-100)}@media (max-width:519px){.level-path:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{left:19px}.level-path:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{left:19px}.level-path:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{right:19px}.level-path:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{right:19px}.level-path>li{grid-template-columns:42px minmax(0,1fr);gap:.75rem}.level-node{block-size:42px;inline-size:42px;font-size:.9375rem}}.next-card{border-radius:var(--radius-lg);background:var(--ink-900);color:var(--white);padding:1.5rem}.next-card-eyebrow{color:var(--sun-400);font-size:.8125rem;font-weight:600}.next-card-title{font-family:var(--font-display);color:var(--white);margin-block-start:.375rem;font-size:1.375rem;font-weight:700;line-height:1.25}.next-card-meta{color:#ffffffb3;margin-block-start:.5rem;margin-block-end:1.125rem;font-size:.875rem}.with-aside{flex-wrap:wrap;align-items:flex-start;gap:0 2.5rem;display:flex}.with-aside>.main-column{flex:999 33.75rem;min-inline-size:0}.with-aside>.aside-column{flex-direction:column;flex:18.75rem;gap:1rem;margin-block-start:3.5rem;display:flex}@media (min-width:900px){.with-aside>.aside-column{position:sticky;top:5.75rem}}@media (forced-colors:active){.card,.empty,.flash,.subject-tile,.outcome,.next-card,.learner-hero{border:1px solid canvastext}.btn{border:1px solid buttonborder}.meter>span{background:highlight}.card-current{box-shadow:none;outline:2px solid highlight}.progress-ring{border:2px solid canvastext}.check input[type=checkbox]:checked:after{color:canvastext}}.shell-header{z-index:20;-webkit-backdrop-filter:saturate(1.4)blur(10px);border-block-end:1px solid var(--sand-200);background:#fbfaf7db;position:sticky;top:0}.shell-header-inner{flex-wrap:wrap;align-items:center;gap:.5rem 1.5rem;min-block-size:4.25rem;max-inline-size:70rem;margin-inline-start:auto;margin-inline-end:auto;padding:.625rem 1.5rem;display:flex}.shell-nav{flex-wrap:wrap;gap:.25rem;display:flex}.shell-nav-link{min-block-size:2.5rem;color:var(--ink-700);white-space:nowrap;cursor:pointer;transition:background var(--dur-fast);background:0 0;border-radius:999px;align-items:center;padding:0 1rem;font-size:.9375rem;font-weight:500;text-decoration:none;display:inline-flex}.shell-nav-link:hover{background:var(--sand-100);color:var(--ink-900)}.shell-nav-link[aria-current=page]{background:var(--blue-50);color:var(--blue-700)}.shell-account-controls{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:.25rem .75rem;min-inline-size:0;display:flex}.shell-brand{color:var(--ink-900);align-items:center;gap:.625rem;text-decoration:none;display:inline-flex}.shell-brand-mark{background:var(--blue-500);block-size:2.25rem;inline-size:2.25rem;color:var(--white);font-family:var(--font-display);box-shadow:var(--shadow-button);border-radius:12px;place-items:center;font-size:1.25rem;font-weight:800;line-height:1;display:grid;position:relative}.shell-brand-mark:after{content:"";background:var(--sun-400);border:2px solid var(--white);border-radius:999px;block-size:11px;inline-size:11px;position:absolute;top:-3px}.shell-brand-mark:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{right:-3px}.shell-brand-mark:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{right:-3px}.shell-brand-mark:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{left:-3px}.shell-brand-mark:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{left:-3px}.shell-brand-mark-lg{border-radius:17px;block-size:3.25rem;inline-size:3.25rem;font-size:1.75rem}.shell-brand-mark-lg:after{block-size:16px;inline-size:16px}.shell-brand-word{font-family:var(--font-display);letter-spacing:-.02em;font-size:1.125rem;font-weight:700;line-height:1.1}.shell-brand-word span{color:var(--ink-500);font-weight:500}.shell-menu{position:relative}.shell-menu>summary{list-style:none}.shell-menu>summary::-webkit-details-marker{display:none}.shell-account{border:1.5px solid var(--sand-200);background:var(--white);color:var(--ink-900);cursor:pointer;border-radius:999px;align-items:center;gap:.625rem;padding:.25rem .875rem .25rem .25rem;font-size:.9375rem;font-weight:500;display:inline-flex}.shell-account:after{content:"▼";color:var(--ink-500);font-size:10px}.shell-avatar{background:var(--grape-100);block-size:2rem;inline-size:2rem;color:var(--grape-700);font-family:var(--font-display);border-radius:999px;place-items:center;font-weight:800;display:grid}.shell-menu-sheet{z-index:50;border-radius:var(--radius-md);border:1px solid var(--sand-200);background:var(--white);min-inline-size:15rem;box-shadow:var(--shadow-lg);margin-block-start:.5rem;padding:.375rem;position:absolute;top:100%}.shell-menu-sheet:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){right:0}.shell-menu-sheet:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){right:0}.shell-menu-sheet:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){left:0}.shell-menu-sheet:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){left:0}.shell-menu-item{inline-size:100%;color:var(--ink-900);text-align:start;cursor:pointer;background:0 0;border-radius:10px;align-items:center;padding:.625rem .75rem;font-size:.9375rem;font-weight:500;text-decoration:none;display:flex}.shell-menu-item:hover{background:var(--sand-100)}.shell-menu-sheet form{margin:0}.shell-menu-label{letter-spacing:.06em;text-transform:uppercase;color:var(--ink-500);padding:.5rem .75rem .25rem;font-size:.75rem;font-weight:600;display:block}.shell-menu-sheet select{inline-size:calc(100% - 1.5rem);margin:.25rem .75rem .5rem}.shell-footer{background:var(--sand-100);border-block-start:1px solid var(--sand-200);margin-block-start:5rem}.shell-footer-inner{max-inline-size:70rem;color:var(--ink-500);flex-wrap:wrap;align-items:center;gap:1rem 2rem;margin-inline-start:auto;margin-inline-end:auto;padding:2rem 1.5rem;font-size:.875rem;display:flex}.shell-footer-links{flex-wrap:wrap;gap:1.25rem;margin-inline-start:auto;display:flex}.shell-footer-links a,.shell-footer-links button{color:var(--ink-500);cursor:pointer;background:0 0;font-size:.875rem;text-decoration:none}.shell-footer-links a:hover,.shell-footer-links button:hover{color:var(--ink-900);text-underline-offset:3px;text-decoration:underline}.shell-footer .shell-brand-mark{border-radius:10px;block-size:1.875rem;inline-size:1.875rem;font-size:1rem}.shell-footer .shell-brand-word{font-size:.9375rem}.shell-messages{flex-direction:column;gap:.5rem;max-inline-size:70rem;margin-inline-start:auto;margin-inline-end:auto;padding:1rem 1.5rem 0;display:flex}.auth-layout{grid-template-columns:repeat(auto-fit,minmax(min(100%,26rem),1fr));align-items:start;gap:2rem;max-inline-size:70rem;margin-inline-start:auto;margin-inline-end:auto;padding:2.5rem 1rem 4rem;display:grid}@media (min-width:640px){.auth-layout{padding-inline-start:1.5rem;padding-inline-end:1.5rem}}.auth-aside{isolation:isolate;border-radius:var(--radius-xl);background:var(--tone-band);flex-direction:column;padding:clamp(1.75rem,5vw,3rem);display:flex;position:relative;overflow:hidden}.auth-aside:before{content:"";z-index:-1;background:var(--tone-100);opacity:.9;border-radius:999px;block-size:340px;inline-size:340px;position:absolute;top:-140px}.auth-aside:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{right:-90px}.auth-aside:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{right:-90px}.auth-aside:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{left:-90px}.auth-aside:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{left:-90px}.auth-aside:after{content:"";z-index:-1;background:var(--sun-100);opacity:.85;border-radius:999px;block-size:160px;inline-size:160px;position:absolute;bottom:-90px}.auth-aside:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{right:140px}.auth-aside:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{right:140px}.auth-aside:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{left:140px}.auth-aside:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{left:140px}@media (min-width:900px){.auth-aside{min-block-size:32.5rem}}.auth-aside-title{font-family:var(--font-display);letter-spacing:-.025em;color:var(--ink-900);text-wrap:balance;max-inline-size:16ch;margin-block-start:1.75rem;font-size:clamp(1.75rem,3.4vw,2.5rem);font-weight:800;line-height:1.08}.auth-points{flex-direction:column;gap:.75rem;margin-block-start:1.5rem;padding:0;list-style:none;display:flex}.auth-points li{color:var(--ink-700);align-items:flex-start;gap:.75rem;display:flex}.auth-points li:before{content:"✓";background:var(--white);block-size:26px;inline-size:26px;color:var(--tone-700);box-shadow:var(--shadow-xs);border-radius:999px;flex:none;place-items:center;font-size:13px;font-weight:700;display:grid}.auth-panel{background:var(--white);border:1px solid var(--sand-200);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);padding:clamp(1.5rem,4vw,2.75rem)}.auth-eyebrow{color:var(--blue-600);font-size:.875rem;font-weight:600}.auth-title{font-family:var(--font-display);letter-spacing:-.025em;color:var(--ink-900);margin-block-start:.375rem;font-size:2rem;font-weight:800;line-height:1.1}.auth-lede{color:var(--ink-500);margin-block-start:.625rem}.auth-foot{text-align:center;color:var(--ink-500);margin-block-start:1.5rem;font-size:.9375rem}.lesson-rail{z-index:15;-webkit-backdrop-filter:blur(10px);border-block-end:1px solid var(--sand-200);background:#fbfaf7e6;margin-block-end:1.5rem;margin-inline-start:calc(50% - 50vw);margin-inline-end:calc(50% - 50vw);padding-inline-start:calc(50vw - 50%);padding-inline-end:calc(50vw - 50%);position:sticky;top:4.25rem}.lesson-rail-inner{align-items:center;gap:1rem;padding-block-start:.875rem;padding-block-end:.875rem;display:flex}.lesson-rail-exit{border:1.5px solid var(--sand-300);background:var(--white);block-size:2.5rem;inline-size:2.5rem;color:var(--ink-700);border-radius:999px;flex:none;place-items:center;font-size:1.125rem;text-decoration:none;display:grid}.lesson-rail-exit:hover{border-color:var(--blue-400);background:var(--blue-50);color:var(--blue-700)}.lesson-rail-main{flex:1;min-inline-size:0}.lesson-rail-top{flex-wrap:wrap;justify-content:space-between;gap:.125rem .75rem;margin-block-end:.5rem;font-size:.8125rem;display:flex}.lesson-rail-label{min-inline-size:0;color:var(--ink-900);white-space:nowrap;text-overflow:ellipsis;flex:12rem;font-weight:600;overflow:hidden}.lesson-rail-label span{color:var(--ink-500);font-weight:400}.lesson-rail-save{min-inline-size:0;color:var(--mint-700);flex:0 auto;font-weight:500}.lesson-rail-save:not(:empty):before{content:"● "}.lesson-segments{flex-wrap:wrap;gap:2px 6px;display:flex}.lesson-segment{cursor:pointer;background:0 0;border:0;flex:1 0 24px;block-size:24px;min-inline-size:24px;padding:0;position:relative}.lesson-segment:before{content:"";background:var(--sand-200);block-size:10px;transition:background var(--dur-base);border-radius:999px;position:absolute;top:7px;left:0;right:0}.lesson-segment[data-state=done]:before{background:var(--blue-300)}.lesson-segment[aria-current=step]:before{background:var(--blue-500);box-shadow:0 0 0 3px var(--blue-100)}.lesson-segment:hover:before{background:var(--blue-400)}@media (forced-colors:active){.lesson-segment:before{border:1px solid canvastext}.lesson-segment[aria-current=step]:before{background:highlight}}.lesson-steps{margin-block-start:.5rem}.lesson-steps-summary{cursor:pointer;color:var(--ink-500);align-items:center;font-size:.8125rem;font-weight:500;list-style:none;display:inline-flex}.lesson-steps-summary::-webkit-details-marker{display:none}.lesson-steps-summary:before{content:"▸ ";white-space:pre}.lesson-steps[open]>.lesson-steps-summary:before{content:"▾ "}.lesson-steps-list{flex-wrap:wrap;gap:.375rem;max-block-size:14rem;margin-block-start:.625rem;padding-block-end:.5rem;display:flex;overflow-y:auto}.lesson-step-chip{border:1px solid var(--sand-300);background:var(--white);color:var(--ink-700);text-align:start;cursor:pointer;border-radius:999px;padding:.3125rem .75rem;font-size:.8125rem}.lesson-step-chip:hover{border-color:var(--blue-400);background:var(--blue-50)}.lesson-step-chip[aria-current=step]{background:var(--blue-500);border-color:var(--blue-500);color:var(--white)}.lesson-header{margin-block-end:1.5rem}.lesson-eyebrow{color:var(--tone-700);font-size:.875rem;font-weight:600}.lesson-eyebrow a{color:inherit;text-decoration:none}.lesson-eyebrow a:hover{text-underline-offset:3px;text-decoration:underline}.lesson-title{font-family:var(--font-display);letter-spacing:-.025em;color:var(--ink-900);text-wrap:balance;margin-block-start:.375rem;font-size:clamp(2rem,4vw,2.75rem);font-weight:800;line-height:1.08}.lesson-summary{color:var(--ink-500);max-inline-size:60ch;margin-block-start:.625rem;font-size:1.0625rem}.lesson-meta{color:var(--ink-500);flex-wrap:wrap;align-items:center;gap:.25rem 1rem;margin-block-start:.875rem;font-size:.875rem;display:flex}.lesson-block{scroll-margin-block-start:9rem}.lesson-block.card{border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);padding:clamp(1.5rem,5vw,3rem)}.lesson-block.card:hover{transform:none}.lesson-block>h2[tabindex="-1"]:focus,.lesson-finished-title:focus{outline:none}.lesson-block>h2{font-family:var(--font-display);letter-spacing:-.02em;color:var(--ink-900);text-wrap:balance;margin-block-end:1rem;font-size:clamp(1.5rem,3vw,2rem);font-weight:800;line-height:1.15}.lesson-block [data-stage]{background:var(--sand-100);color:var(--ink-500);letter-spacing:0;text-transform:none;border-radius:999px;align-items:center;gap:.5rem;margin-block-end:1rem;padding:.3125rem .75rem;font-size:.8125rem;font-weight:600;display:inline-flex}.lesson-block [data-stage]:before{content:"";background:currentColor;border-radius:999px;block-size:7px;inline-size:7px}.lesson-block [data-stage=guided]{background:var(--blue-100);color:var(--blue-700)}.lesson-block [data-stage=independent]{background:var(--grape-100);color:var(--grape-700)}.lesson-block [data-stage=final]{background:var(--mint-100);color:var(--mint-700)}.lesson-block .prose,.lesson-block .reading{max-inline-size:66ch;color:var(--ink-700);font-size:1.125rem;line-height:1.75}.lesson-block .prose p+p{margin-block-start:1rem}.lesson-block .prose strong{color:var(--ink-900)}.lesson-block .prose h3,.lesson-block .prose h4{color:var(--ink-900);margin-block-start:1.5rem;margin-block-end:.5rem}.lesson-block .prose table{border:1px solid var(--sand-200);border-radius:var(--radius-sm);border-collapse:separate;border-spacing:0;max-inline-size:100%;font-size:1rem;display:block;overflow-x:auto}.lesson-block .prose th{background:var(--sand-100);color:var(--ink-900)}.lesson-block .prose th,.lesson-block .prose td{border-block-end:1px solid var(--sand-200);padding:.5rem .875rem}.lesson-block [data-worked-steps]{border-inline-start:0;padding-inline-start:0}.lesson-block [data-alternative]{background:var(--sand-100);border:0;border-radius:18px;margin-block-start:1.75rem;padding:1rem 1.25rem}.lesson-block [data-alternative]>p:first-child{color:var(--ink-500);text-transform:none;letter-spacing:0;font-size:.8125rem;font-weight:600}.lesson-block [data-alternative] .prose{font-size:1rem}.lesson-block [data-gate],.lesson-block [data-activity-failed]{border-radius:var(--radius-md);background:var(--sun-100);color:var(--sun-700);padding:1rem 1.125rem;font-size:.9375rem}.lesson-block [data-test-summary]{border-radius:var(--radius-md);background:var(--blue-50);color:var(--blue-700);font-family:var(--font-display);padding:1rem 1.125rem;font-size:1.125rem;font-weight:700}.lesson-block .practice-count{color:var(--ink-500);margin-block-start:.5rem;font-size:.875rem}.worked-steps{counter-reset:worked-step;flex-direction:column;gap:.75rem;margin-block-start:1.25rem;padding:0;list-style:none;display:flex}.worked-steps>li{counter-increment:worked-step;border:1px solid var(--sand-200);background:var(--white);border-radius:18px;padding:1rem 1.125rem;padding-inline-start:4.125rem;position:relative}.worked-steps>li:before{content:counter(worked-step);background:var(--blue-500);block-size:2.125rem;inline-size:2.125rem;color:var(--white);font-family:var(--font-display);border-radius:999px;place-items:center;font-size:.9375rem;font-weight:700;display:grid;position:absolute;top:.875rem}.worked-steps>li:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{left:1.125rem}.worked-steps>li:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{left:1.125rem}.worked-steps>li:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{right:1.125rem}.worked-steps>li:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{right:1.125rem}.worked-steps>li[data-faded]{border-color:var(--sun-400);background:var(--sun-100)}.worked-steps>li[data-faded]:before{background:var(--sun-400);color:var(--ink-900)}.worked-steps-single>li{padding-inline-start:1.125rem}.worked-steps-single>li:before{content:none}.worked-steps>li>div:first-child{color:var(--ink-900);font-weight:500}.worked-show{border-radius:var(--radius-sm);background:var(--sand-50);margin-block-start:.375rem;margin-block-end:.375rem;padding:.375rem .75rem;overflow:auto hidden}.worked-why{color:var(--ink-500);margin-block-start:.375rem;font-size:.9375rem;line-height:1.55}.worked-why>span:first-child{color:var(--ink-700);font-weight:600}[data-lesson-player]{padding-block-end:2rem}body:has(.lesson-bottom-bar:not([hidden])){padding-block-end:5.5rem}@media (min-width:640px){html{scroll-padding-block-start:5.5rem}}html:has([data-lesson-player]){scroll-padding-block:11rem 6.5rem}@media (max-width:639px){html:has([data-lesson-player]){scroll-padding-block-start:8rem}}.lesson-bottom-bar{z-index:15;-webkit-backdrop-filter:blur(10px);border-block-start:1px solid var(--sand-200);background:#fffffff0;position:fixed;bottom:0;left:0;right:0}.lesson-bottom-bar-inner{max-inline-size:55rem;padding:.875rem 1.5rem calc(.875rem + env(safe-area-inset-bottom));justify-content:space-between;align-items:center;gap:.75rem;margin-inline-start:auto;margin-inline-end:auto;display:flex}.lesson-bottom-count{color:var(--ink-500);font-variant-numeric:tabular-nums;font-size:.875rem}.lesson-finished{isolation:isolate;border-radius:var(--radius-xl);background:var(--mint-100);text-align:center;padding:clamp(1.75rem,5vw,3.5rem);position:relative;overflow:hidden}.lesson-finished:before{content:"";z-index:-1;background:#c6efdc;border-radius:999px;block-size:340px;inline-size:340px;position:absolute;top:-140px}.lesson-finished:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{right:-90px}.lesson-finished:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):before{right:-90px}.lesson-finished:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{left:-90px}.lesson-finished:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):before{left:-90px}.lesson-finished:after{content:"";z-index:-1;background:var(--sun-100);border-radius:999px;block-size:160px;inline-size:160px;position:absolute;bottom:-90px}.lesson-finished:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{left:60px}.lesson-finished:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))):after{left:60px}.lesson-finished:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{right:60px}.lesson-finished:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)):after{right:60px}.lesson-finished .progress-ring{margin-inline-start:auto;margin-inline-end:auto}.lesson-finished-title{font-family:var(--font-display);letter-spacing:-.025em;color:var(--ink-900);margin-block-start:1.5rem;font-size:2.25rem;font-weight:800}.lesson-finished-text{max-inline-size:46ch;color:var(--ink-700);margin:.625rem auto 0;font-size:1.0625rem}.lesson-finished .btn-row{justify-content:center;margin-block-start:1.75rem}.lesson-unfinished{border-radius:var(--radius-xl);background:var(--sun-100);padding:clamp(1.75rem,5vw,3rem)}.lesson-unfinished .lesson-finished-title{margin-block-start:0}.lesson-unfinished .lesson-finished-text{margin-inline-start:0;margin-inline-end:0}.lesson-unfinished-list{flex-wrap:wrap;gap:.5rem;margin-block-start:1.25rem;margin-block-end:1.5rem;padding:0;list-style:none;display:flex}.lesson-unfinished-list .btn{white-space:normal;text-align:start}.lesson-unfinished .lesson-finished-title:focus{outline:none}[data-activity]>p:first-child,.activity-prompt{font-family:var(--font-display);letter-spacing:-.01em;color:var(--ink-900);font-size:1.375rem;font-weight:700;line-height:1.3}.activity-help{color:var(--ink-500);font-size:.9375rem}.activity-feedback{border-radius:var(--radius-md);background:var(--blue-50);color:var(--ink-700);white-space:pre-wrap;align-items:flex-start;gap:.875rem;margin-block-start:1.25rem;padding:1rem 1.125rem;line-height:1.55;display:flex}.activity-feedback:before{content:"i";background:var(--blue-400);block-size:32px;inline-size:32px;color:var(--white);font-size:15px;font-weight:700;font-family:var(--font-display);border-radius:999px;flex:none;place-items:center;display:grid}.activity-feedback>div{flex:1;min-inline-size:0;padding-block-start:.25rem}.activity-feedback[data-kind=ok]{background:var(--mint-100)}.activity-feedback[data-kind=ok]:before{content:"✓";background:var(--mint-400)}.activity-feedback[data-kind=warn]{background:var(--sun-100)}.activity-feedback[data-kind=warn]:before{content:"↻";background:var(--sun-400);color:var(--ink-900)}.activity-feedback-title{font-family:var(--font-display);color:var(--blue-700);font-size:1.125rem;font-weight:700}.activity-feedback[data-kind=ok] .activity-feedback-title{color:var(--mint-700)}.activity-feedback[data-kind=warn] .activity-feedback-title{color:var(--sun-700)}.activity-actions{flex-wrap:wrap;align-items:center;gap:.625rem;margin-block-start:1.5rem;display:flex}.activity-actions .activity-report{margin-inline-start:auto}.activity-report-button{color:var(--ink-500);text-decoration:underline;-webkit-text-decoration-color:var(--sand-400);-webkit-text-decoration-color:var(--sand-400);-webkit-text-decoration-color:var(--sand-400);text-decoration-color:var(--sand-400);text-underline-offset:3px;cursor:pointer;background:0 0;border:0;padding:.25rem;font-size:.8125rem}.activity-report-button:hover{color:var(--ink-900)}.activity-issue-form{border-radius:var(--radius-md);border:1px solid var(--sand-200);background:var(--sand-50);flex-direction:column;gap:.625rem;margin-block-start:.75rem;padding:1rem;font-size:.875rem;display:flex}.activity-issue-form select,.activity-issue-form textarea{border:1.5px solid var(--sand-300);border-radius:var(--radius-sm);background:var(--white);padding:.5rem .75rem}.choice-option{border-radius:var(--radius-md);border:2px solid var(--sand-200);background:var(--white);cursor:pointer;min-block-size:3.75rem;transition:border-color var(--dur-fast), background var(--dur-fast), transform var(--dur-fast);align-items:center;gap:.875rem;padding:.625rem 1rem;display:flex;position:relative}.choice-option:hover{border-color:var(--blue-300);transform:translateY(-1px)}.choice-option:has(input:checked){border-color:var(--blue-500);background:var(--blue-50);transform:none}.choice-option:has(input:focus-visible){outline:3px solid var(--blue-500);outline-offset:3px}.choice-option input{opacity:0;block-size:1px;inline-size:1px;position:absolute}.choice-letter{background:var(--sand-100);block-size:2rem;inline-size:2rem;color:var(--ink-500);font-family:var(--font-display);border-radius:999px;flex:none;place-items:center;font-size:.875rem;font-weight:700;display:grid}.choice-option[data-multiple] .choice-letter{border-radius:10px}.choice-option:has(input:checked) .choice-letter{background:var(--blue-500);color:var(--white)}.choice-text{color:var(--ink-900);min-inline-size:0;font-size:1.0625rem;font-weight:500}.choice-option[data-state=correct]{border-color:var(--mint-400);background:var(--mint-100)}.choice-option[data-state=correct] .choice-letter{background:var(--mint-400);color:var(--white)}.choice-option[data-state=incorrect]{border-color:var(--sun-400);background:var(--sun-100)}.choice-option[data-state=incorrect] .choice-letter{background:var(--sun-400);color:var(--ink-900)}@media (forced-colors:active){.choice-option:has(input:checked){outline:3px solid highlight}}[data-activity] input[type=text],[data-activity] input[type=number],[data-activity] input:not([type]),[data-activity] textarea,[data-activity] select{border:1.5px solid var(--sand-300);border-radius:var(--radius-sm);background:var(--white);color:var(--ink-900)}[data-activity] input[type=text]:focus,[data-activity] input[type=number]:focus,[data-activity] input:not([type]):focus,[data-activity] textarea:focus,[data-activity] select:focus{border-color:var(--blue-500);box-shadow:var(--shadow-focus);outline:none}[data-activity] input[data-answer-box]{min-block-size:4.5rem;inline-size:min(100%,14rem);font-family:var(--font-display);text-align:center;border-width:2px;border-radius:18px;padding:0 1.25rem;font-size:2rem;font-weight:700}@media (max-width:639px){.shell-header{position:static}.shell-header-inner{gap:.25rem .5rem;padding-inline-start:1rem;padding-inline-end:1rem}.shell-header .shell-nav{flex-wrap:nowrap;order:3;inline-size:100%;padding-block-end:.125rem;overflow-x:auto}.shell-public-nav{flex-wrap:nowrap;gap:.125rem}.shell-public-nav .shell-nav-link{padding-inline-start:.625rem;padding-inline-end:.625rem;font-size:.875rem}.shell-public-nav .shell-nav-explore{display:none}.shell-public-nav .btn{min-block-size:2.5rem;padding-inline-start:.875rem;padding-inline-end:.875rem;font-size:.875rem}.shell-nav-link{padding-inline-start:.75rem;padding-inline-end:.75rem}.shell-account-controls{margin-inline-start:auto}.learner-hero{border-radius:var(--radius-lg)}.lesson-rail{top:0}.lesson-step-chip{text-overflow:ellipsis;white-space:nowrap;max-inline-size:100%;overflow:hidden}.lesson-bottom-bar-inner{padding-inline-start:1rem;padding-inline-end:1rem}.lesson-bottom-bar .btn{padding-inline-start:1.125rem;padding-inline-end:1.125rem}.shell-brand-word span{display:none}}.shell-lang.form-control{border-radius:999px;min-block-size:2.5rem;inline-size:auto;padding-block-start:.25rem;padding-block-end:.25rem;padding-inline-start:.875rem;font-size:.875rem}.letter-cluster{grid-template-columns:repeat(3,auto);gap:.875rem;display:grid}.letter-cluster>span{background:var(--tone-400);block-size:clamp(3.5rem,8vw,5.25rem);inline-size:clamp(3.5rem,8vw,5.25rem);color:var(--tone-on);font-family:var(--font-display);box-shadow:var(--shadow-sm);border-radius:24px;place-items:center;font-size:clamp(1.75rem,4vw,2.5rem);font-weight:800;display:grid}.letter-cluster>span:nth-child(odd){transform:rotate(-6deg)}.letter-cluster>span:nth-child(2n){transform:rotate(5deg)translateY(.75rem)}.course-card-mark-lg{border-radius:18px;block-size:3.5rem;inline-size:3.5rem;font-size:1.5rem}}@layer utilities{.pointer-events-none{pointer-events:none}.invisible{visibility:hidden}.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.absolute{position:absolute}.fixed{position:fixed}.relative{position:relative}.static{position:static}.inset-0{top:0;bottom:0;left:0;right:0}.right-4{right:calc(var(--spacing) * 4)}.bottom-4{bottom:calc(var(--spacing) * 4)}.left-0{left:0}.z-20{z-index:20}.z-\[60\]{z-index:60}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.mx-1{margin-inline:var(--spacing)}.mx-2{margin-inline:calc(var(--spacing) * 2)}.mx-auto{margin-inline-start:auto;margin-inline-end:auto}.my-2{margin-block:calc(var(--spacing) * 2)}.my-3{margin-block:calc(var(--spacing) * 3)}.ms-auto{margin-inline-start:auto}.me-2{margin-inline-end:calc(var(--spacing) * 2)}.mt-1{margin-top:var(--spacing)}.mt-1\.5{margin-top:calc(var(--spacing) * 1.5)}.mt-2{margin-top:calc(var(--spacing) * 2)}.mt-3{margin-top:calc(var(--spacing) * 3)}.mt-3\.5{margin-top:calc(var(--spacing) * 3.5)}.mt-4{margin-top:calc(var(--spacing) * 4)}.mt-5{margin-top:calc(var(--spacing) * 5)}.mt-6{margin-top:calc(var(--spacing) * 6)}.mt-7{margin-top:calc(var(--spacing) * 7)}.mt-8{margin-top:calc(var(--spacing) * 8)}.mt-12{margin-top:calc(var(--spacing) * 12)}.mr-1{margin-right:var(--spacing)}.mr-2{margin-right:calc(var(--spacing) * 2)}.mb-1{margin-bottom:var(--spacing)}.mb-2{margin-bottom:calc(var(--spacing) * 2)}.mb-3{margin-bottom:calc(var(--spacing) * 3)}.mb-3\.5{margin-bottom:calc(var(--spacing) * 3.5)}.mb-4{margin-bottom:calc(var(--spacing) * 4)}.mb-5{margin-bottom:calc(var(--spacing) * 5)}.mb-6{margin-bottom:calc(var(--spacing) * 6)}.ml-2{margin-left:calc(var(--spacing) * 2)}.ml-6{margin-left:calc(var(--spacing) * 6)}.ml-auto{margin-left:auto}.line-clamp-4{-webkit-line-clamp:4;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.\!grid{display:grid!important}.block{display:block}.contents{display:contents}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.inline-block{display:inline-block}.inline-flex{display:inline-flex}.inline-grid{display:inline-grid}.table{display:table}.h-10{height:calc(var(--spacing) * 10)}.h-16{height:calc(var(--spacing) * 16)}.h-28{height:calc(var(--spacing) * 28)}.h-32{height:calc(var(--spacing) * 32)}.h-72{height:calc(var(--spacing) * 72)}.h-80{height:calc(var(--spacing) * 80)}.h-\[70vh\]{height:70vh}.h-\[75vh\]{height:75vh}.h-auto{height:auto}.h-full{height:100%}.max-h-64{max-height:calc(var(--spacing) * 64)}.max-h-72{max-height:calc(var(--spacing) * 72)}.max-h-80{max-height:calc(var(--spacing) * 80)}.min-h-9{min-height:calc(var(--spacing) * 9)}.min-h-screen{min-height:100vh}.w-10{width:calc(var(--spacing) * 10)}.w-12{width:calc(var(--spacing) * 12)}.w-16{width:calc(var(--spacing) * 16)}.w-20{width:calc(var(--spacing) * 20)}.w-24{width:calc(var(--spacing) * 24)}.w-28{width:calc(var(--spacing) * 28)}.w-32{width:calc(var(--spacing) * 32)}.w-40{width:calc(var(--spacing) * 40)}.w-56{width:calc(var(--spacing) * 56)}.w-\[calc\(100\%-2rem\)\]{width:calc(100% - 2rem)}.w-full{width:100%}.max-w-3xl{max-width:var(--container-3xl)}.max-w-6xl{max-width:var(--container-6xl)}.max-w-7xl{max-width:var(--container-7xl)}.max-w-\[26rem\]{max-width:26rem}.max-w-\[62ch\]{max-width:62ch}.max-w-full{max-width:100%}.max-w-lg{max-width:var(--container-lg)}.max-w-md{max-width:var(--container-md)}.max-w-none{max-width:none}.max-w-sm{max-width:var(--container-sm)}.max-w-xs{max-width:var(--container-xs)}.min-w-0{min-width:0}.min-w-32{min-width:calc(var(--spacing) * 32)}.min-w-40{min-width:calc(var(--spacing) * 40)}.min-w-\[16rem\]{min-width:16rem}.min-w-full{min-width:100%}.flex-1{flex:1}.flex-\[1_1_16rem\]{flex:16rem}.flex-\[1_1_28rem\]{flex:28rem}.shrink{flex-shrink:1}.shrink-0{flex-shrink:0}.grow{flex-grow:1}.border-collapse{border-collapse:collapse}.-translate-x-1\/2{--tw-translate-x:calc(calc(1 / 2 * 100%) * -1);translate:var(--tw-translate-x) var(--tw-translate-y)}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.cursor-grab{cursor:grab}.cursor-pointer{cursor:pointer}.touch-none{touch-action:none}.list-decimal{list-style-type:decimal}.list-disc{list-style-type:disc}.list-none{list-style-type:none}.\[grid-template-columns\:repeat\(auto-fit\,minmax\(min\(100\%\,12rem\)\,1fr\)\)\]{grid-template-columns:repeat(auto-fit,minmax(min(100%,12rem),1fr))}.\[grid-template-columns\:repeat\(auto-fit\,minmax\(min\(100\%\,13rem\)\,1fr\)\)\]{grid-template-columns:repeat(auto-fit,minmax(min(100%,13rem),1fr))}.\[grid-template-columns\:repeat\(auto-fit\,minmax\(min\(100\%\,18rem\)\,1fr\)\)\]{grid-template-columns:repeat(auto-fit,minmax(min(100%,18rem),1fr))}.grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-cols-\[auto_1fr\]{grid-template-columns:auto 1fr}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}.items-baseline{align-items:baseline}.items-center{align-items:center}.items-end{align-items:flex-end}.items-start{align-items:flex-start}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.gap-1{gap:var(--spacing)}.gap-1\.5{gap:calc(var(--spacing) * 1.5)}.gap-2{gap:calc(var(--spacing) * 2)}.gap-2\.5{gap:calc(var(--spacing) * 2.5)}.gap-3{gap:calc(var(--spacing) * 3)}.gap-4{gap:calc(var(--spacing) * 4)}.gap-5{gap:calc(var(--spacing) * 5)}:where(.space-y-1>:not(:last-child)){--tw-space-y-reverse:0;margin-block-start:calc(var(--spacing) * var(--tw-space-y-reverse));margin-block-end:calc(var(--spacing) * calc(1 - var(--tw-space-y-reverse)))}:where(.space-y-2>:not(:last-child)){--tw-space-y-reverse:0;margin-block-start:calc(calc(var(--spacing) * 2) * var(--tw-space-y-reverse));margin-block-end:calc(calc(var(--spacing) * 2) * calc(1 - var(--tw-space-y-reverse)))}:where(.space-y-3>:not(:last-child)){--tw-space-y-reverse:0;margin-block-start:calc(calc(var(--spacing) * 3) * var(--tw-space-y-reverse));margin-block-end:calc(calc(var(--spacing) * 3) * calc(1 - var(--tw-space-y-reverse)))}:where(.space-y-4>:not(:last-child)){--tw-space-y-reverse:0;margin-block-start:calc(calc(var(--spacing) * 4) * var(--tw-space-y-reverse));margin-block-end:calc(calc(var(--spacing) * 4) * calc(1 - var(--tw-space-y-reverse)))}.gap-x-3{column-gap:calc(var(--spacing) * 3)}.gap-x-8{column-gap:calc(var(--spacing) * 8)}.gap-y-4{row-gap:calc(var(--spacing) * 4)}.self-end{align-self:flex-end}.overflow-auto{overflow:auto}.overflow-x-auto{overflow-x:auto}.overflow-y-hidden{overflow-y:hidden}.rounded{border-radius:.25rem}.rounded-2xl{border-radius:var(--radius-2xl)}.rounded-full{border-radius:2147483647px}.rounded-lg{border-radius:var(--radius-lg)}.rounded-xl{border-radius:var(--radius-xl)}.border{border-style:var(--tw-border-style);border-width:1px}.border-0{border-style:var(--tw-border-style);border-width:0}.border-2{border-style:var(--tw-border-style);border-width:2px}.border-t{border-top-style:var(--tw-border-style);border-top-width:1px}.border-r-2{border-right-style:var(--tw-border-style);border-right-width:2px}.border-l-2{border-left-style:var(--tw-border-style);border-left-width:2px}.border-l-4{border-left-style:var(--tw-border-style);border-left-width:4px}.border-dashed{--tw-border-style:dashed;border-style:dashed}.border-\[var\(--nydus-line-strong\)\]{border-color:var(--nydus-line-strong)}.border-amber-300{border-color:var(--color-amber-300)}.border-indigo-100{border-color:var(--color-indigo-100)}.border-red-200{border-color:var(--color-red-200)}.border-slate-200{border-color:var(--color-slate-200)}.border-slate-300{border-color:var(--color-slate-300)}.border-slate-400{border-color:var(--color-slate-400)}.border-slate-700{border-color:var(--color-slate-700)}.border-slate-900{border-color:var(--color-slate-900)}.border-transparent{border-color:#0000}.bg-\[var\(--nydus-surface\)\]{background-color:var(--nydus-surface)}.bg-amber-50{background-color:var(--color-amber-50)}.bg-amber-100{background-color:var(--color-amber-100)}.bg-emerald-100{background-color:var(--color-emerald-100)}.bg-indigo-50{background-color:var(--color-indigo-50)}.bg-red-50{background-color:var(--color-red-50)}.bg-red-700{background-color:var(--color-red-700)}.bg-sky-600{background-color:var(--color-sky-600)}.bg-slate-50{background-color:var(--color-slate-50)}.bg-slate-100{background-color:var(--color-slate-100)}.bg-slate-900{background-color:var(--color-slate-900)}.bg-white{background-color:var(--color-white)}.object-contain{object-fit:contain}.p-1{padding:var(--spacing)}.p-2{padding:calc(var(--spacing) * 2)}.p-3{padding:calc(var(--spacing) * 3)}.p-4{padding:calc(var(--spacing) * 4)}.p-5{padding:calc(var(--spacing) * 5)}.px-1{padding-inline:var(--spacing)}.px-2{padding-inline:calc(var(--spacing) * 2)}.px-3{padding-inline:calc(var(--spacing) * 3)}.px-4{padding-inline:calc(var(--spacing) * 4)}.px-5{padding-inline:calc(var(--spacing) * 5)}.py-0\.5{padding-block:calc(var(--spacing) * .5)}.py-1{padding-block:var(--spacing)}.py-2{padding-block:calc(var(--spacing) * 2)}.py-3{padding-block:calc(var(--spacing) * 3)}.py-4\.5{padding-block:calc(var(--spacing) * 4.5)}.pt-1{padding-top:var(--spacing)}.pt-2{padding-top:calc(var(--spacing) * 2)}.pt-4{padding-top:calc(var(--spacing) * 4)}.pl-5{padding-left:calc(var(--spacing) * 5)}.pl-6{padding-left:calc(var(--spacing) * 6)}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.text-start{text-align:start}.align-middle{vertical-align:middle}.align-top{vertical-align:top}.font-mono{font-family:var(--font-mono)}.font-sans{font-family:var(--font-sans)}.text-2xl{font-size:var(--text-2xl);line-height:var(--tw-leading,var(--text-2xl--line-height))}.text-base{font-size:var(--text-base);line-height:var(--tw-leading,var(--text-base--line-height))}.text-lg{font-size:var(--text-lg);line-height:var(--tw-leading,var(--text-lg--line-height))}.text-sm{font-size:var(--text-sm);line-height:var(--tw-leading,var(--text-sm--line-height))}.text-xs{font-size:var(--text-xs);line-height:var(--tw-leading,var(--text-xs--line-height))}.text-\[0\.8125rem\]{font-size:.8125rem}.text-\[0\.9375rem\]{font-size:.9375rem}.text-\[1\.0625rem\]{font-size:1.0625rem}.text-\[1\.1875rem\]{font-size:1.1875rem}.leading-loose{--tw-leading:var(--leading-loose);line-height:var(--leading-loose)}.leading-relaxed{--tw-leading:var(--leading-relaxed);line-height:var(--leading-relaxed)}.font-medium{--tw-font-weight:var(--font-weight-medium);font-weight:var(--font-weight-medium)}.font-normal{--tw-font-weight:var(--font-weight-normal);font-weight:var(--font-weight-normal)}.font-semibold{--tw-font-weight:var(--font-weight-semibold);font-weight:var(--font-weight-semibold)}.tracking-tight{--tw-tracking:var(--tracking-tight);letter-spacing:var(--tracking-tight)}.tracking-wide{--tw-tracking:var(--tracking-wide);letter-spacing:var(--tracking-wide)}.whitespace-nowrap{white-space:nowrap}.whitespace-pre-wrap{white-space:pre-wrap}.text-\[var\(--nydus-ink\)\]{color:var(--nydus-ink)}.text-\[var\(--nydus-muted\)\]{color:var(--nydus-muted)}.text-red-700{color:var(--color-red-700)}.text-red-800{color:var(--color-red-800)}.text-slate-400{color:var(--color-slate-400)}.text-slate-500{color:var(--color-slate-500)}.text-slate-600{color:var(--color-slate-600)}.text-slate-700{color:var(--color-slate-700)}.text-slate-900{color:var(--color-slate-900)}.text-white{color:var(--color-white)}.uppercase{text-transform:uppercase}.underline{text-decoration-line:underline}.underline-offset-2{text-underline-offset:2px}.opacity-80{opacity:.8}.shadow{--tw-shadow:0 1px 3px 0 var(--tw-shadow-color,#0000001a), 0 1px 2px -1px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.shadow-lg{--tw-shadow:0 10px 15px -3px var(--tw-shadow-color,#0000001a), 0 4px 6px -4px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.ring{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.ring-2{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(2px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.ring-blue-600{--tw-ring-color:var(--color-blue-600)}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.blur{--tw-blur:blur(8px);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.select-all{-webkit-user-select:all;user-select:all}.select-none{-webkit-user-select:none;user-select:none}@media (hover:hover){.hover\:bg-red-800:hover{background-color:var(--color-red-800)}.hover\:bg-slate-100:hover{background-color:var(--color-slate-100)}}.focus\:not-sr-only:focus{clip-path:none;white-space:normal;width:auto;height:auto;margin:0;padding:0;position:static;overflow:visible}@media not all and (min-width:40rem){.max-sm\:hidden{display:none}}@media (min-width:40rem){.sm\:right-6{right:calc(var(--spacing) * 6)}.sm\:bottom-6{bottom:calc(var(--spacing) * 6)}.sm\:w-auto{width:auto}.sm\:flex-1{flex:1}.sm\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.sm\:grid-cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.sm\:p-6{padding:calc(var(--spacing) * 6)}}@media (min-width:48rem){.md\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:64rem){.lg\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}}@media print{.print\:hidden{display:none}}}:root{--blue-50:#f2f6ff;--blue-100:#e3ebff;--blue-200:#c7d6ff;--blue-300:#9db6fd;--blue-400:#6f93fa;--blue-500:#3866f2;--blue-600:#2a52d6;--blue-700:#1f3fae;--blue-900:#14285e;--ink-900:#1a2138;--ink-700:#3a4259;--ink-500:#646b80;--ink-300:#a9aebd;--white:#fff;--sand-50:#fbfaf7;--sand-100:#f5f3ee;--sand-200:#ece8e0;--sand-300:#ddd7cc;--sand-400:#c9c1b3;--sun-100:#fff3cc;--sun-400:#ffc940;--sun-700:#8a5a00;--coral-100:#ffe7df;--coral-400:#ff7a59;--coral-700:#b23a1e;--mint-100:#dbf5ea;--mint-400:#34c48f;--mint-700:#0b7250;--sky-100:#daf3fa;--sky-400:#2cb8db;--sky-700:#0a6a84;--grape-100:#eee7ff;--grape-400:#9166f5;--grape-700:#5a31c4;--berry-100:#fde5ef;--berry-400:#f0649e;--berry-700:#a72a60;--danger-100:#ffe6e6;--danger-500:#e5484d;--danger-700:#b4232a;--font-display:"Bricolage Grotesque", ui-rounded, system-ui, sans-serif;--font-text:"Lexend", system-ui, -apple-system, "Segoe UI", sans-serif;--font-code:"DM Mono", ui-monospace, Menlo, monospace;--radius-xs:8px;--radius-sm:12px;--radius-md:16px;--radius-lg:20px;--radius-xl:28px;--shadow-xs:0 1px 2px #1a21380f;--shadow-sm:0 1px 2px #1a21380d, 0 4px 14px #1a21380d;--shadow-md:0 2px 4px #1a21380a, 0 14px 36px #1a213817;--shadow-lg:0 4px 8px #1a21380d, 0 24px 56px #1a21381f;--shadow-button:inset 0 -3px 0 #00000029;--shadow-focus:0 0 0 4px #3866f238;--ease-out:cubic-bezier(.2, .8, .2, 1);--dur-fast:.12s;--dur-base:.2s;--nydus-page:var(--sand-50);--nydus-surface:var(--white);--nydus-ink:var(--ink-900);--nydus-body:var(--ink-700);--nydus-muted:var(--ink-500);--nydus-line:var(--sand-200);--nydus-line-strong:var(--sand-300);--nydus-accent:var(--blue-500);--nydus-accent-soft:var(--blue-50);--nydus-good:var(--mint-700);--nydus-good-soft:var(--mint-100);--nydus-attention:var(--sun-700);--nydus-attention-soft:var(--sun-100);--tone-100:var(--blue-100);--tone-400:var(--blue-500);--tone-700:var(--blue-700);--tone-on:var(--white);--tone-band:var(--blue-50);--tone-ring:var(--blue-200)}.tone-blue{--tone-100:var(--blue-100);--tone-400:var(--blue-500);--tone-700:var(--blue-700);--tone-on:var(--white);--tone-band:var(--blue-50);--tone-ring:var(--blue-200)}.tone-sun{--tone-100:var(--sun-100);--tone-400:var(--sun-400);--tone-700:var(--sun-700);--tone-on:var(--ink-900);--tone-band:var(--sun-100);--tone-ring:#ffe39a}.tone-coral{--tone-100:var(--coral-100);--tone-400:var(--coral-400);--tone-700:var(--coral-700);--tone-on:var(--white);--tone-band:var(--coral-100);--tone-ring:#ffc9b8}.tone-mint{--tone-100:var(--mint-100);--tone-400:var(--mint-400);--tone-700:var(--mint-700);--tone-on:var(--white);--tone-band:var(--mint-100);--tone-ring:#a9e8cd}.tone-sky{--tone-100:var(--sky-100);--tone-400:var(--sky-400);--tone-700:var(--sky-700);--tone-on:var(--white);--tone-band:var(--sky-100);--tone-ring:#a6e1f1}.tone-grape{--tone-100:var(--grape-100);--tone-400:var(--grape-400);--tone-700:var(--grape-700);--tone-on:var(--white);--tone-band:var(--grape-100);--tone-ring:#d2c2fc}.tone-berry{--tone-100:var(--berry-100);--tone-400:var(--berry-400);--tone-700:var(--berry-700);--tone-on:var(--white);--tone-band:var(--berry-100);--tone-ring:#f9bdd5}#MJX-SVG-global-cache{display:none}mjx-container svg{vertical-align:baseline;display:inline}mjx-container[display=true] svg{margin:.5em auto;display:block}[data-working] mjx-container[display=true]{text-align:left;margin:0}[data-working] mjx-container[display=true] svg{margin:.25em 0}[data-working]:has(input[data-blank]){flex-wrap:wrap;align-items:center;gap:.5rem .25rem;display:flex;overflow:visible}[data-working]:has(input[data-blank]) mjx-container{max-width:100%;display:inline-block;overflow:auto hidden}[dir=rtl] mjx-container,[dir=rtl] .tex,[dir=rtl] code,[dir=rtl] pre,[dir=rtl] input[type=number],[dir=rtl] [data-ltr]{direction:ltr;unicode-bidi:isolate}[dir=rtl] [data-activity=number_line],[dir=rtl] [data-activity=fraction_model],[dir=rtl] [data-activity=count_group],[dir=rtl] [data-activity=matrix],[dir=rtl] [data-activity=graph_plot],[dir=rtl] [data-activity=trace],[dir=rtl] [data-activity=geometric_construction],[dir=rtl] [data-activity=map],[dir=rtl] [data-activity=relationship_graph]{direction:ltr}@property --tw-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-z{syntax:"*";inherits:false;initial-value:0}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --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}