/*! 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,::backdrop{--tw-border-style:solid;--tw-font-weight:initial;--tw-ordinal:initial;--tw-slashed-zero:initial;--tw-numeric-figure:initial;--tw-numeric-spacing:initial;--tw-numeric-fraction:initial;--tw-animation-delay:0s;--tw-animation-direction:normal;--tw-animation-duration:initial;--tw-animation-fill-mode:none;--tw-animation-iteration-count:1;--tw-enter-blur:0;--tw-enter-opacity:1;--tw-enter-rotate:0;--tw-enter-scale:1;--tw-enter-translate-x:0;--tw-enter-translate-y:0;--tw-exit-blur:0;--tw-exit-opacity:1;--tw-exit-rotate:0;--tw-exit-scale:1;--tw-exit-translate-x:0;--tw-exit-translate-y:0}}}@layer theme{:root,:host{--color-black:#000;--spacing:.25rem;--font-weight-semibold:600;--radius-xl:.75rem;--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1)}}@layer base,components;@layer utilities{.invisible{visibility:hidden}.visible{visibility:visible}.fixed{position:fixed}.relative{position:relative}.sticky{position:sticky}.inset-0{inset:0}.inset-x-0{inset-inline:0}.bottom-0{bottom:0}.z-50{z-index:50}.container{width:100%}@media (width>=40rem){.container{max-width:40rem}}@media (width>=48rem){.container{max-width:48rem}}@media (width>=64rem){.container{max-width:64rem}}@media (width>=80rem){.container{max-width:80rem}}@media (width>=96rem){.container{max-width:96rem}}.mx-auto{margin-inline:auto}.mt-4{margin-top:calc(var(--spacing) * 4)}.mt-24{margin-top:calc(var(--spacing) * 24)}.mt-auto{margin-top:auto}.block{display:block}.flex{display:flex}.hidden{display:none}.inline{display:inline}.h-2{height:calc(var(--spacing) * 2)}.h-auto{height:auto}.max-h-\[85vh\]{max-height:85vh}.w-\[100px\]{width:100px}.shrink-0{flex-shrink:0}.resize{resize:both}.flex-col{flex-direction:column}.gap-0\.5{gap:calc(var(--spacing) * .5)}.gap-2{gap:calc(var(--spacing) * 2)}.rounded-full{border-radius:2147483647px}.rounded-t-xl{border-top-left-radius:var(--radius-xl);border-top-right-radius:var(--radius-xl)}.border{border-style:var(--tw-border-style);border-width:1px}.border-border{border-color:var(--border)}.bg-background{background-color:var(--surface)}.bg-black\/50{background-color:#00000080}@supports (color:color-mix(in lab, red, red)){.bg-black\/50{background-color:color-mix(in oklab, var(--color-black) 50%, transparent)}}.bg-muted{background-color:var(--border)}.p-4{padding:calc(var(--spacing) * 4)}.font-semibold{--tw-font-weight:var(--font-weight-semibold);font-weight:var(--font-weight-semibold)}.text-foreground{color:var(--text)}.text-muted-foreground{color:var(--muted)}.ordinal{--tw-ordinal:ordinal;font-variant-numeric:var(--tw-ordinal,) var(--tw-slashed-zero,) var(--tw-numeric-figure,) var(--tw-numeric-spacing,) var(--tw-numeric-fraction,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.running{animation-play-state:running}.data-\[state\=closed\]\:animate-out[data-state=closed]{animation:exit var(--tw-animation-duration,var(--tw-duration,.15s))var(--tw-ease,ease)var(--tw-animation-delay,0s)var(--tw-animation-iteration-count,1)var(--tw-animation-direction,normal)var(--tw-animation-fill-mode,none)}.data-\[state\=closed\]\:fade-out-0[data-state=closed]{--tw-exit-opacity:0}.data-\[state\=open\]\:animate-in[data-state=open]{animation:enter var(--tw-animation-duration,var(--tw-duration,.15s))var(--tw-ease,ease)var(--tw-animation-delay,0s)var(--tw-animation-iteration-count,1)var(--tw-animation-direction,normal)var(--tw-animation-fill-mode,none)}.data-\[state\=open\]\:fade-in-0[data-state=open]{--tw-enter-opacity:0}}@property --tw-animation-delay{syntax:"*";inherits:false;initial-value:0s}@property --tw-animation-direction{syntax:"*";inherits:false;initial-value:normal}@property --tw-animation-duration{syntax:"*";inherits:false}@property --tw-animation-fill-mode{syntax:"*";inherits:false;initial-value:none}@property --tw-animation-iteration-count{syntax:"*";inherits:false;initial-value:1}@property --tw-enter-blur{syntax:"*";inherits:false;initial-value:0}@property --tw-enter-opacity{syntax:"*";inherits:false;initial-value:1}@property --tw-enter-rotate{syntax:"*";inherits:false;initial-value:0}@property --tw-enter-scale{syntax:"*";inherits:false;initial-value:1}@property --tw-enter-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-enter-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-blur{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-opacity{syntax:"*";inherits:false;initial-value:1}@property --tw-exit-rotate{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-scale{syntax:"*";inherits:false;initial-value:1}@property --tw-exit-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-exit-translate-y{syntax:"*";inherits:false;initial-value:0}:root{--page:#f6f7f5;--surface:#fbfcfa;--text:#20242a;--muted:#666c77;--muted-strong:#545b65;--border:#e1e5e1;--border-strong:#cfd5d0;--primary:#2f66d0;--primary-hover:#2559ba;--positive:#287454;--warning:#9a681f;--danger:#a13f42;--focus:#2f66d0;--radius:.5rem;--content:73.75rem;--prose:47.5rem;color:var(--text);background:var(--page);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{background:var(--page);min-width:0;margin:0}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.62}a{color:var(--primary);overflow-wrap:anywhere}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}h1,h2,h3,p,li,label{overflow-wrap:anywhere}h1,h2,h3{letter-spacing:-.025em}p{line-height:1.6}small{color:var(--muted);line-height:1.45}.app-shell{min-width:0;min-height:100vh}.app-header{height:84px;max-width:var(--content);border-bottom:1px solid var(--border);align-items:center;gap:1.5rem;margin:auto;padding:0 2.5rem;display:flex}.brand{align-items:center;display:flex}.brand img{width:auto;height:48px}nav{min-width:0;display:flex}.app-header nav{align-self:stretch;gap:1.5rem}.app-header nav a{color:var(--muted-strong);border-bottom:2px solid #0000;align-items:center;font-size:.9rem;text-decoration:none;display:flex}.app-header nav a[aria-current=page]{border-color:var(--primary);color:var(--text);font-weight:650}.avatar{border:1px solid var(--border-strong);width:2.5rem;height:2.5rem;color:var(--muted-strong);border-radius:50%;place-items:center;font-size:.9rem;font-weight:650;text-decoration:none;display:grid}.tutor-launcher{z-index:40;border:1px solid var(--border-strong);background:var(--surface);min-width:3rem;min-height:3rem;color:var(--muted-strong);border-radius:999px;padding:.55rem .95rem;font-weight:650;position:fixed;bottom:1rem;right:1rem;box-shadow:0 1px 6px #20242a24}.tutor-launcher:hover{color:var(--text)}.pwa-update{z-index:50;border:1px solid var(--border-strong);background:var(--surface);border-radius:.75rem;align-items:center;gap:.75rem;max-width:calc(100vw - 2rem);padding:.75rem 1rem;display:flex;position:fixed;top:5.25rem;left:50%;transform:translate(-50%);box-shadow:0 2px 12px #20242a29}.pwa-update button{background:var(--primary);color:#fff;min-height:2.5rem;font:inherit;border:0;border-radius:.5rem;padding:.4rem .8rem;font-weight:650}.health{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.app-content{max-width:var(--content);min-width:0;margin:0 auto;padding:4.5rem 2.5rem 6rem}section,article{min-width:0}.page-wide{max-width:56rem}.page-intro{max-width:43rem}.eyebrow{color:var(--primary);letter-spacing:.025em;margin:0;font-size:.82rem;font-weight:700}h1{margin:.65rem 0 0;font-size:clamp(1.5rem,2.5vw,2rem);font-weight:650;line-height:1.2}.lede{color:var(--muted-strong);margin:1.1rem 0 0;font-size:1.1rem}.learn-groups{gap:3.5rem;margin-top:4rem;display:grid}.topic-group{grid-template-columns:11.25rem minmax(0,1fr);gap:2rem;display:grid}.topic-group h2{margin:0;font-size:1rem}.topic-group>div>p{color:var(--muted);margin:.5rem 0 0;font-size:.86rem}.topic-rows{border-bottom:1px solid var(--border)}.topic-row{border-top:1px solid var(--border);min-height:5rem;color:var(--text);justify-content:space-between;align-items:center;gap:1rem;text-decoration:none;display:flex}.topic-row strong,.topic-row small{display:block}.topic-row small{margin-top:.35rem}.topic-row>span:last-child{color:var(--primary);font-size:1.6rem}.topic-row-module{padding-block:1.25rem}.secondary-nav{gap:1rem;margin-top:3rem;font-size:.9rem}.secondary-nav a{color:var(--muted-strong)}.learn-article{max-width:var(--prose)}.back-link{color:var(--muted);font-size:.9rem;text-decoration:none}.article-heading{border-bottom:1px solid var(--border);margin-top:2rem;padding-bottom:2.25rem}.article-heading>p:not(.eyebrow){color:var(--muted)}.markdown{overflow-wrap:anywhere;padding-top:1.5rem}.markdown h2{margin:2.75rem 0 1rem;font-size:1.4rem}.markdown h3{margin-top:2rem}.markdown p,.markdown li{line-height:1.72}.markdown blockquote{border-left:3px solid var(--border-strong);color:var(--muted-strong);margin:1.5rem 0;padding:.5rem 0 .5rem 1.15rem}.markdown pre{background:var(--surface);border:1px solid var(--border);max-width:100%;padding:1rem;overflow:auto}.learn-article>ul{padding-left:1.25rem}.source-references{color:var(--muted);margin-top:3rem;font-size:.86rem}.source-references summary{cursor:pointer;color:var(--muted-strong)}.source-references ul{padding-left:1.25rem}.source-references a{color:var(--muted-strong)}.practice{max-width:47.5rem;margin-inline:auto}.practice-meta{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.practice-meta p:not(.eyebrow){color:var(--muted);margin:.35rem 0 0;font-size:.9rem}.practice-prompt{max-width:44rem;margin-top:2rem;font-size:clamp(1.4rem,3vw,1.9rem);line-height:1.25}.vocabulary{color:var(--muted-strong);margin-top:1.5rem}.vocabulary summary{cursor:pointer;width:fit-content;font-size:.9rem;font-weight:650}.vocabulary summary:hover{color:var(--text)}.vocabulary ul{margin:.5rem 0 0;padding-left:1.25rem}.vocabulary-open .vocabulary-title{margin:0;font-size:.9rem;font-weight:650}.translation{margin-top:.75rem}.translation p{color:var(--muted-strong);margin:.35rem 0 0}.practice-hint{border-top:1px solid var(--border);color:var(--muted-strong);margin-top:1.25rem;padding-top:1rem}.practice-hint strong{font-size:.9rem}.practice-hint p{margin:.35rem 0 0}.practice-work{border:1px solid var(--border);background:var(--surface);border-radius:.75rem;margin-top:2.75rem;padding:1.5rem}.answer-label{justify-content:space-between;align-items:baseline;gap:1rem;display:flex}.answer-label label{font-weight:650}.answer-label span{color:var(--muted);font-size:.78rem}textarea,input{border:1px solid var(--border-strong);border-radius:var(--radius);width:100%;max-width:100%;color:var(--text);background:#fff}textarea{resize:vertical;min-height:8rem;margin-top:.65rem;padding:.8rem}textarea:read-only{color:var(--muted-strong);background:#f2f3f1}#practice-answer{font-size:max(1rem,17px)}.page-practice .speech-input,.page-practice .shadowing-replay{margin-top:1rem}.diff-word{border-bottom:2px solid var(--warning);font-weight:650}.shadowing-heard,.shadowing-reference-diff{margin:.35rem 0}.shadowing-reference-diff{color:var(--muted)}.actions{flex-wrap:wrap;gap:.65rem;margin-top:1rem;display:flex}.button{border-radius:var(--radius);border:1px solid #0000;min-height:2.6rem;padding:.55rem .9rem}.button-primary{border-color:var(--primary);background:var(--primary);color:#fff;font-weight:650}.button-primary:hover:not(:disabled){background:var(--primary-hover)}.button-secondary{border-color:var(--border-strong);background:var(--surface);color:var(--muted-strong)}.button-quiet{color:var(--muted-strong);background:0 0;border-color:#0000}.practice-feedback,.example-answer,.command-error{border-top:1px solid var(--border);margin-top:1.25rem;padding-top:1rem}.practice-feedback strong{color:var(--warning)}.practice-feedback.accepted strong{color:var(--positive)}.practice-feedback.technical strong,.command-error{color:var(--danger)}.diagnostic{color:var(--muted);margin-bottom:0;font-family:ui-monospace,SFMono-Regular,monospace;font-size:.8rem}.example-answer,.reference-answer{border-left:3px solid var(--border-strong);padding:.25rem 0 .25rem 1rem}.example-answer p,.reference-answer p{margin:.35rem 0;font-weight:600}.tts-playback{flex-wrap:wrap;align-items:center;gap:.65rem;margin-top:.75rem;display:flex}.tts-speed{color:var(--muted-strong);align-items:center;gap:.4rem;font-size:.85rem;display:flex}.tts-speed select{border:1px solid var(--border-strong);border-radius:var(--radius);width:auto;color:var(--text);background:#fff;padding:.25rem .4rem}.tts-status,.tts-error{flex-basis:100%;margin:0;font-size:.85rem}.tts-status{color:var(--muted)}.tts-error{color:var(--danger)}.practice-chooser,.settings-page{max-width:var(--prose)}.practice-direction{gap:.45rem;margin-top:1.5rem;display:grid}.practice-direction label{font-weight:650}.practice-direction input{padding:.7rem .75rem}.practice-direction p{color:var(--muted);margin:0}.practice-challenge{gap:.45rem;margin-top:1rem;display:grid}.practice-challenge>span{font-weight:650}.practice-challenge-options{gap:1.25rem;display:flex}.practice-challenge-option{align-items:center;gap:.45rem;font-weight:400;display:flex}.practice-challenge p{color:var(--muted);margin:0}.practice-recommendation{border:1px solid var(--border-strong);background:var(--surface);border-radius:.75rem;margin-top:1.5rem;padding:1.25rem}.practice-recommendation h2{margin:0;font-size:1.2rem}.practice-recommendation p{margin:.4rem 0 0}.practice-recommendation .recommendation-reason{color:var(--muted-strong)}.practice-recommendation .actions{margin-top:1rem}.practice-focus{color:var(--muted);margin:.75rem 0 0;font-size:.9rem}.practice-history{max-width:var(--prose)}.history-summary{border-top:1px solid var(--border);padding:1.25rem 0}.history-summary h2{margin:0;font-size:1.2rem}.history-summary p{color:var(--muted-strong);margin:.35rem 0 0}.history-item{border:1px solid var(--border);background:var(--surface);border-radius:.75rem;margin-top:1.75rem;padding:1.25rem}.history-item.replaced{opacity:.72}.history-state{border:1px solid var(--border-strong);color:var(--muted-strong);border-radius:999px;margin:0;padding:.15rem .6rem;font-size:.78rem;font-weight:650;display:inline-block}.history-item.replaced .history-state{border-color:var(--border);color:var(--muted)}.history-note{color:var(--muted);margin:.5rem 0 0;font-size:.85rem}.history-item h2{margin:.9rem 0 0;font-size:1.25rem;line-height:1.3}.history-ordinal{color:var(--muted)}.history-material{margin-top:1rem}.history-attempt-no{color:var(--muted);letter-spacing:.025em;margin:0;font-size:.78rem;font-weight:650}.history-reveal{color:var(--muted-strong);margin:1.25rem 0 0;font-size:.9rem}.history-targets{color:var(--muted-strong);margin-top:1.25rem}.history-targets strong{font-size:.9rem}.history-targets ul{margin:.35rem 0 0;padding-left:1.25rem}.history-empty{color:var(--muted);margin:1.25rem 0 0}.module-choice{border-top:1px solid var(--border);padding:1.25rem 0}.module-choice h2{margin:0;font-size:1.2rem}.module-choice p{color:var(--muted-strong)}.settings-page form{gap:1.75rem;margin-top:2rem;display:grid}.setting-field{gap:.45rem;display:grid}.setting-field>span{font-weight:650}.setting-field input{padding:.7rem .75rem}.settings-page form>p{color:var(--muted);margin:0}.not-found{max-width:var(--prose)}.tutor-drawer{max-width:47.5rem;height:min(38rem,85dvh);max-height:92dvh;margin:0 auto}.tutor-header{border-bottom:1px solid var(--border);flex-direction:row;justify-content:space-between;align-items:baseline;gap:1rem;padding:1rem 1.5rem}.tutor-header .tutor-title{font-size:1.05rem}.tutor-header .tutor-description{margin:.15rem 0 0;font-size:.85rem}.tutor-transcript{flex:1;min-height:0;padding:1.25rem 1.5rem;overflow-y:auto}.tutor-turn{margin-top:1.1rem}.tutor-turn:first-child,.tutor-empty+.tutor-turn{margin-top:0}.tutor-role{color:var(--muted);letter-spacing:.025em;font-size:.78rem;font-weight:650;display:block}.tutor-turn.user .tutor-role{color:var(--primary)}.tutor-turn p{margin:.25rem 0 0}.tutor-turn .markdown{padding-top:0}.tutor-turn .markdown>:first-child{margin-top:.25rem}.tutor-turn .markdown h2{margin:1.25rem 0 .5rem}.tutor-empty{color:var(--muted);margin:0}.tutor-pending{color:var(--muted);margin:1.1rem 0 0;font-style:italic}.tutor-error{border-top:1px solid var(--border);color:var(--danger);margin:0;padding:.65rem 1.5rem}.tutor-composer{border-top:1px solid var(--border);align-items:flex-end;gap:.65rem;padding:1rem 1.5rem 1.25rem;display:flex}.tutor-composer textarea{resize:none;min-height:3.4rem;margin-top:0;padding:.65rem .75rem}.tutor-composer .button{flex:none}@media (width<=700px){.app-header{gap:1rem;height:74px;padding:0 1.25rem}.pwa-update{top:4.625rem}.brand img{width:auto;height:42px}.app-header nav{gap:1.15rem}.app-content{padding:2.75rem 1.25rem 4.5rem}.topic-group{grid-template-columns:1fr;gap:1rem}.learn-groups{gap:2.5rem;margin-top:2.75rem}.practice-work{margin-top:2rem;padding:1.25rem}.practice-meta{align-items:flex-start}.answer-label span{display:none}.actions{flex-direction:column;align-items:stretch}.actions .button{width:100%}.practice-meta .button{flex:none}.app-content:has(.page-practice){padding-top:1.25rem}.page-practice .practice-prompt{margin-top:.9rem}.page-practice .practice-work{margin-top:1.25rem;padding:1rem}.page-practice textarea{min-height:5.5rem}.page-practice .practice-actions{z-index:1;border-top:1px solid var(--border);background:var(--surface);grid-template-columns:repeat(2,minmax(0,1fr));gap:.65rem;margin-top:1rem;padding-top:.85rem;display:grid;position:sticky;bottom:4.5rem}.page-practice .practice-actions .button{min-height:2.75rem}.page-practice .practice-actions .button-primary:only-child{grid-column:1/-1}.tutor-drawer{height:88dvh;max-height:92dvh}.tutor-header,.tutor-transcript,.tutor-error,.tutor-composer{padding-left:1.25rem;padding-right:1.25rem}}@media (width>=701px) and (width<=1024px){.app-content:has(.page-practice){padding:2.5rem 1.5rem 5rem}.page-practice .practice-prompt{margin-top:1.5rem}.page-practice .practice-work{margin-top:2rem}.topic-group{grid-template-columns:1fr;gap:1rem}}@media (width<=400px){.app-header{gap:.6rem;padding:0 .75rem}.brand img{height:34px}.app-header nav{gap:.7rem}.app-header nav a{font-size:.82rem}.avatar{width:2.1rem;height:2.1rem}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important}}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@keyframes enter{0%{opacity:var(--tw-enter-opacity,1);transform:translate3d(var(--tw-enter-translate-x,0),var(--tw-enter-translate-y,0),0)scale3d(var(--tw-enter-scale,1),var(--tw-enter-scale,1),var(--tw-enter-scale,1))rotate(var(--tw-enter-rotate,0));filter:blur(var(--tw-enter-blur,0))}}@keyframes exit{to{opacity:var(--tw-exit-opacity,1);transform:translate3d(var(--tw-exit-translate-x,0),var(--tw-exit-translate-y,0),0)scale3d(var(--tw-exit-scale,1),var(--tw-exit-scale,1),var(--tw-exit-scale,1))rotate(var(--tw-exit-rotate,0));filter:blur(var(--tw-exit-blur,0))}}