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:root{--background:#f6f8fc;--surface:#fff;--surface-card:#efefec;--surface-soft:#eef3ff;--surface-accent-blue:#e9edff;--surface-navigation:#e8edf6;--surface-secondary:var(--blue-pale);--surface-accent-purple:#ebe7ff;--surface-accent-yellow:#fff2cf;--surface-accent-red:#ffebe6;--surface-accent-green:#e3f4e9;--practice-purple:#7655e8;--practice-yellow:#f0bd36;--practice-red:#e65b4f;--practice-green:#37a96b;--primary:#24358f;--primary-hover:#1c286d;--primary-strong:var(--primary);--primary-soft:#e5eaff;--blue-light:#bfd4ff;--blue-pale:#edf3ff;--blue-medium:#86a7ff;--blue-dark:var(--primary);--text-primary:#151515;--text-secondary:#454545;--text-muted:#747474;--border-default:#d8d9df;--border-strong:var(--blue-light);--border:var(--border-default);--white:#fff;--cream:#f7f7f3;--success:#278a5b;--error:#d32f2f;--warning:#e6a829;--radius-sm:8px;--radius-md:16px;--radius-lg:24px;--radius-xl:32px;--radius-full:999px;--container-width:76rem;--container-width-reading:44rem;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-7:1.75rem;--space-8:2rem;--font-weight-heading:600;--type-h1:2rem;--type-h2:1.5rem;--type-h3:1.25rem;--type-error-code:clamp(6rem, 20vw, 12rem);--mobile-header-height:calc(2.75rem + 2rem + 1px);--home-hero-inset:var(--space-5)}*{box-sizing:border-box}body{background:var(--background);min-height:100vh;color:var(--text-primary);font-family:var(--font-onest), sans-serif;letter-spacing:normal;margin:0;line-height:normal}h1,h2,h3,h4,h5,h6{font-weight:var(--font-weight-heading)}a{color:var(--primary)}.site-shell{flex-direction:column;min-height:100vh;display:flex}.container{width:min(100% - 2rem, var(--container-width));margin-inline:auto}.container--reading{max-width:var(--container-width-reading)}.site-header,.site-footer{background:var(--background);padding-block:1rem}.site-header{z-index:10;border-bottom:0;padding-block:0;position:relative}.site-header .container,.site-footer .container{justify-content:space-between;align-items:center;gap:1rem;display:flex}.site-header .container{border-bottom:1px solid var(--border-default);grid-template-columns:1fr auto;row-gap:0;padding-block:1rem;display:grid}.site-name{z-index:2;color:var(--text-primary);letter-spacing:normal;white-space:nowrap;align-items:center;gap:.5rem;font-size:1.375rem;font-weight:800;text-decoration:none;display:inline-flex;position:relative}.site-name__prefix{color:var(--primary-strong)}.mobile-menu-toggle{z-index:2;border-radius:var(--radius-full);background:var(--blue-pale);width:2.75rem;height:2.75rem;color:var(--text-primary);cursor:pointer;border:0;align-content:center;justify-items:center;gap:.3rem;display:grid;position:relative}.mobile-menu-toggle:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.mobile-menu-toggle span{border-radius:var(--radius-full);background:currentColor;width:1.25rem;height:2px;transition:transform .18s,opacity .18s}.mobile-menu-toggle[aria-expanded=true] span:first-child{transform:translateY(.4rem)rotate(45deg)}.mobile-menu-toggle[aria-expanded=true] span:nth-child(2){opacity:0}.mobile-menu-toggle[aria-expanded=true] span:last-child{transform:translateY(-.4rem)rotate(-45deg)}.header-menu{inset:var(--mobile-header-height) 0 0;z-index:1;visibility:hidden;opacity:0;pointer-events:none;background:var(--background);grid-template-rows:0fr;transition:grid-template-rows .18s ease-out,transform .18s ease-out,opacity .14s ease-out,visibility 0s linear .18s;display:grid;position:fixed;transform:translateY(-.5rem)}.header-menu[data-open=true]{visibility:visible;opacity:1;pointer-events:auto;grid-template-rows:1fr;transition:grid-template-rows .18s ease-out,transform .18s ease-out,opacity .14s ease-out,visibility;transform:translateY(0)}.header-menu__inner{align-content:start;gap:var(--space-3);min-height:0;padding-block:0;display:grid;overflow:hidden}.header-menu[data-open=true] .header-menu__inner{height:100%;padding:var(--space-5);padding-bottom:max(var(--space-5), env(safe-area-inset-bottom));grid-template-rows:1fr auto;overflow-y:auto}.site-navigation{align-content:start;gap:var(--space-3);display:grid}.site-navigation__link{border-radius:var(--radius-full);background:var(--surface-navigation);width:100%;min-height:3.5rem;padding:var(--space-3) var(--space-6);color:var(--text-primary);justify-content:space-between;align-items:center;font-size:1.0625rem;font-weight:700;text-decoration:none;transition:background-color .14s,color .14s;display:inline-flex}.site-navigation__chevron{stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:2px;flex:none;width:1.25rem;height:1.25rem}.site-navigation__link:hover,.site-navigation__link:focus-visible{background:var(--primary-soft);color:var(--text-primary)}.header-cta{justify-self:stretch;width:100%}.placeholder-page h1{font-size:var(--type-h1)}.site-main{flex:1}.site-main:has(.not-found-page){place-items:center;display:grid}.not-found-page{justify-items:center;gap:var(--space-6);padding:var(--space-8) var(--space-5);text-align:center;display:grid}.not-found-page h1{font-size:var(--type-error-code);margin:0}.not-found-page p{color:var(--text-secondary);margin:0}.page-loading{z-index:100;background:var(--surface);place-items:center;display:grid;position:fixed;inset:0}.spinner{width:var(--space-8);height:var(--space-8);border-radius:var(--radius-full);background:var(--surface);padding:var(--space-1);flex:none;place-items:center;display:inline-grid}.spinner__ring{border:2px solid var(--primary);border-radius:var(--radius-full);border-right-color:#0000;width:100%;height:100%;animation:.8s linear infinite spinner-rotate}@keyframes spinner-rotate{to{transform:rotate(360deg)}}.placeholder-page{padding-block:2rem}.skill-page{padding-bottom:var(--space-8)}.skill-page__hero{margin-bottom:var(--space-5);border-radius:var(--radius-xl);background:var(--primary-soft);padding:clamp(var(--space-5), 5vw, var(--space-8))}.skill-page__hero--accent-blue{background:var(--surface-accent-blue)}.skill-page__hero--accent-green{background:var(--surface-accent-green)}.skill-page__hero--accent-yellow{background:var(--surface-accent-yellow)}.skill-page__hero--accent-lilac{background:var(--surface-accent-purple)}.skill-exercise-list{gap:var(--space-2);margin:0;padding:0;list-style:none;display:grid}.skill-exercise{align-items:center;gap:var(--space-3);border-radius:var(--radius-full);background:var(--surface);min-height:4.75rem;padding:var(--space-2) var(--space-4);cursor:pointer;grid-template-columns:3rem minmax(0,1fr) 1.5rem;transition:background-color .16s;display:grid}.skill-exercise:where(a){color:inherit;text-decoration:none}.skill-exercise:hover{background:var(--primary-soft)}.skill-exercise:hover .skill-exercise__number{background:var(--white)}.skill-exercise__number{aspect-ratio:1;border-radius:var(--radius-full);background:var(--surface-navigation);width:3rem;color:var(--text-primary);place-items:center;font-size:1rem;font-weight:800;transition:background-color .16s;display:grid}.skill-exercise__title{color:var(--text-primary);font-size:1rem;font-weight:600}.skill-exercise__chevron{width:1.5rem;height:1.5rem;color:var(--primary);stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:2px;justify-self:end}.skill-page__cta{padding-block:var(--space-6);justify-content:center;display:flex}.skill-page__seo{margin-top:var(--space-4)}.reading-exercise-page{padding-block:var(--space-4) var(--space-8)}.reading-exercise-page,.dialogue-section-copy{font-size:1rem}.reading-exercise-page__title{margin:0 0 var(--space-6);font-size:var(--type-h1);letter-spacing:normal}.reading-partner{gap:var(--space-5);margin-bottom:var(--space-6);border-radius:var(--radius-lg);background:var(--surface-accent-blue);padding:clamp(var(--space-5), 4vw, var(--space-7));display:grid}.reading-questions h2{font-size:var(--type-h2);letter-spacing:normal;margin:0}.reading-partner p{margin:0 0 var(--space-2);color:var(--text-secondary)}.reading-partner__inline-link{color:var(--primary);text-decoration:underline}.reading-partner ul{gap:var(--space-2);color:var(--text-secondary);margin:0;padding-left:1.25rem;display:grid}.reading-partner__link{justify-self:stretch;width:100%}.reading-partner__link:focus-visible,.skill-exercise:focus-visible{outline:2px solid var(--primary);outline-offset:3px}.reading-letter{margin-bottom:var(--space-7);border:1px solid var(--border-default);border-radius:var(--radius-lg);background:var(--surface);padding:clamp(var(--space-5), 5vw, var(--space-8))}.reading-letter__label{margin:0 0 var(--space-5);color:var(--text-primary);font-size:1.125rem;font-weight:700}.reading-letter__body{color:var(--text-secondary);font-size:1.125rem}.reading-letter__body p{margin:0 0 var(--space-4);white-space:pre-line}.reading-letter__body p:last-child{margin-bottom:0}.reading-questions>h2{margin-bottom:var(--space-5)}.reading-exercise__form{gap:var(--space-3);grid-template-columns:minmax(0,1fr);display:grid}.exercise-divider{margin:var(--space-5) 0;border:0;border-top:1px solid var(--border-default)}.reading-question{min-width:0;padding:var(--space-2) 0;scroll-margin-top:var(--space-5);border:0;margin:0}.reading-question__prompt{color:var(--text-primary);padding:0;font-weight:700}.reading-question__options{gap:var(--space-1);margin-top:var(--space-1);display:grid}.reading-exercise__submit{white-space:nowrap;flex:auto;width:auto}.reading-exercise__actions{gap:var(--space-2);margin-top:var(--space-4);display:flex}.exercise-actions__back-icon{display:none}.exercise-actions__next{flex:auto;min-width:0}.reading-exercise__partner-note{border-radius:var(--radius-lg);background:var(--surface-accent-green);padding:var(--space-3) var(--space-4);color:var(--text-secondary);font-size:1rem}.reading-exercise__partner-note p{margin:0}.reading-exercise__partner-note strong{color:var(--text-primary)}.reading-exercise__back{white-space:nowrap;flex:auto;width:auto}.reading-option{align-items:center;gap:var(--space-3);min-height:2.75rem;padding:var(--space-2) var(--space-2);color:var(--text-secondary);cursor:pointer;transition:color .14s,background-color .14s;display:flex}.reading-option:hover,.reading-option--selected{color:var(--text-primary)}.reading-option__answer--correct{color:var(--success);font-weight:700}.reading-option__answer--incorrect{color:var(--error);font-weight:700}.reading-option__answer--unanswered{color:var(--error)}.repeat-icon,.exercise-actions__back-icon{stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:2.5px;flex:none;width:1.25rem;height:1.25rem}.reading-option input{appearance:none;border:2px solid var(--border-strong);border-radius:var(--radius-full);background:var(--surface);flex:none;width:1.125rem;height:1.125rem}.reading-option input:checked{border-color:var(--primary);background:var(--primary);box-shadow:inset 0 0 0 3px var(--surface)}.reading-option--unanswered input{border-color:var(--error)}.reading-option--unanswered input:checked{box-shadow:inset 0 0 0 3px var(--surface)}.reading-option input:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.reading-option__feedback{font-weight:700}.exercise-field-feedback{margin:var(--space-2) var(--space-2) 0;color:var(--error);font-size:.9rem}.exercise-instruction{margin:0 0 var(--space-4);color:var(--text-secondary)}.exercise-audio-section,.exercise-writing-section,.speaking-practice{margin-bottom:var(--space-7)}.speaking-practice{gap:var(--space-3);display:grid}.exercise-task-card>.exercise-audio-section,.reading-exercise-page>:is(.exercise-audio-section,.exercise-writing-section,.speaking-practice):last-child{margin-bottom:0}.audio-player{border-radius:var(--radius-full);background:var(--surface-accent-blue);width:100%;max-width:100%;padding:var(--space-2)}.audio-player__media{display:none}.audio-player__controls{align-items:center;gap:var(--space-2);min-width:0;display:flex}.audio-player__play{border-radius:var(--radius-full);background:var(--primary);width:2.75rem;height:2.75rem;color:var(--surface);cursor:pointer;border:0;flex:none;place-items:center;display:grid}.audio-player__play:hover{background:var(--primary-hover)}.audio-player__play svg{stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.8px;width:1.25rem;height:1.25rem}.audio-player__time{width:3.25rem;color:var(--text-secondary);font-variant-numeric:tabular-nums;text-align:center;white-space:nowrap;flex:0 0 3.25rem;font-size:1rem}.audio-player__seek-wrap{--audio-thumb-size:1rem;--audio-thumb-half:.5rem;flex:1;min-width:4rem;height:2.75rem;position:relative}.audio-player__seek-track{top:50%;left:var(--audio-thumb-half);width:calc(100% - var(--audio-thumb-size));border-radius:var(--radius-full);pointer-events:none;background:var(--border-default);height:.375rem;position:absolute;transform:translateY(-50%)}.audio-player__seek-progress{border-radius:var(--radius-full);background:var(--primary);width:0;height:100%;position:absolute;inset:0 auto 0 0}.audio-player__seek-thumb{width:var(--audio-thumb-size);height:var(--audio-thumb-size);border:2px solid var(--surface);border-radius:var(--radius-full);background:var(--primary);box-shadow:0 0 0 1px var(--primary);position:absolute;top:50%;left:0;transform:translate(-50%,-50%)}.audio-player__seek{z-index:1;appearance:none;cursor:pointer;touch-action:pan-y;background:0 0;width:100%;height:100%;margin:0;position:absolute;inset:0}.audio-player__seek:disabled{cursor:not-allowed}.audio-player__seek::-webkit-slider-runnable-track{background:0 0;height:.375rem}.audio-player__seek::-moz-range-track{background:0 0;height:.375rem}.audio-player__seek::-webkit-slider-thumb{appearance:none;border:2px solid var(--surface);border-radius:var(--radius-full);background:var(--primary);width:1rem;height:1rem;box-shadow:0 0 0 1px var(--primary);opacity:0;margin-top:-.3125rem}.audio-player__seek::-moz-range-thumb{border:2px solid var(--surface);border-radius:var(--radius-full);background:var(--primary);width:1rem;height:1rem;box-shadow:0 0 0 1px var(--primary);opacity:0}.audio-player__seek:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.audio-player__speed{border:1px solid var(--primary);border-radius:var(--radius-full);background:var(--primary);width:2.75rem;height:2.75rem;font:inherit;color:var(--surface);cursor:pointer;font-variant-numeric:tabular-nums;flex:0 0 2.75rem;place-items:center;padding:0;font-size:.625rem;font-weight:600;display:grid}.audio-player__speed:hover{border-color:var(--primary-hover);background:var(--primary-hover)}.audio-player__speed:focus-visible,.audio-player button:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.audio-player__message{margin:var(--space-3) 0 0;color:var(--text-secondary);font-size:.9rem}.exercise-task-card,.writing-passage{border:1px solid var(--border-default);border-radius:var(--radius-lg);background:var(--surface);padding:clamp(var(--space-5), 5vw, 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var(--space-5)}.practice-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem}.home-hero{padding-top:1.5rem}.home-hero__hello{min-height:20rem;padding:var(--space-8)}.home-hero__hello-word{font-size:clamp(5.5rem,8vw,8.5rem)}.practice-card{min-height:26rem;padding:2rem}.practice-card__icon{width:7rem;height:7rem}.site-main{padding-block:0}}@media (prefers-reduced-motion:reduce){.spinner__ring{animation:none}.header-menu,.header-menu[data-open=true],.button--secondary,.mobile-menu-toggle span,.practice-card,.skill-exercise,.home-content__preview,.home-content__preview:after,.home-content__chevron,.exercise-select__trigger,.exercise-select__option{transition:none}.exercise-select__menu{animation:none}.practice-card__plus,.home-hero__hello-word{transition:none}}