/* Original English lessons; scoped to keep the keyboard workspace independent. */
@font-face{font-family:'Doulos SIL';src:url("./fonts-DoulosSIL-R.6f8995f48e01.ttf") format('truetype');font-style:normal;font-weight:400;font-display:swap}
.learn-shell{font-size:15px;line-height:1.7;color:var(--ink);text-align:start;overflow-wrap:anywhere}
.learn-shell [hidden]{display:none!important}
.learn-shell h1,.learn-shell h2,.learn-shell h3,.learn-shell h4{line-height:1.24;letter-spacing:-.02em;color:var(--ink)}
.learn-shell h2{font-size:32px;margin:10px 0 15px}.learn-shell h3{font-size:23px;margin:4px 0 14px}.learn-shell h4{font-size:17px;margin:8px 0}
.learn-shell p{margin:0 0 14px}.learn-shell p:last-child{margin-bottom:0}.learn-shell .icon{width:18px;height:18px;flex:none}
.learn-shell :is(a,button,input,textarea,summary):focus-visible{outline:2px solid var(--accent-readable,#80456e);outline-offset:4px}
.learn-shell :is(h2,h3,section,article)[id],.learn-guide{scroll-margin-top:100px}
.learning-guide{padding-block:64px 36px;scroll-margin-top:90px}.learning-guide:focus{outline:none}
.learn-heading{display:flex;gap:28px;justify-content:space-between;align-items:flex-start}.learn-heading>div:first-child{max-width:780px}
.learn-kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:650;color:var(--accent-readable,#80456e)}
.learn-kicker .icon:last-child{width:14px}.learn-intro{font-size:17px;line-height:1.7;color:var(--muted);max-width:730px}
.learn-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.learn-heading>.learn-actions{flex-shrink:0;padding-top:10px}
.learn-level{display:inline-flex;border-radius:30px;padding:4px 10px;font-size:11px;font-weight:650;line-height:1.5;background:var(--accent-soft);color:var(--accent-readable,#80456e)}
.learn-button{display:inline-flex;gap:8px;justify-content:center;align-items:center;min-height:40px;padding:9px 15px;border:1px solid var(--line);border-radius:10px;background:var(--surface);font-size:13px;font-weight:650;line-height:1.4;color:var(--ink);transition:background .18s,border-color .18s}
.learn-button:hover{background:var(--accent-soft);border-color:var(--accent)}.learn-button.learn-primary{background:var(--accent);color:var(--accent-ink,#2b1530);border-color:transparent}.learn-button.learn-primary:hover{background:var(--accent-hover)}
.learn-jump{display:flex;gap:6px;flex-wrap:wrap;margin:27px 0 26px;padding:8px;border:1px solid var(--line);border-radius:13px;background:var(--surface)}
.learn-jump a{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;padding:8px 14px;border-radius:8px}.learn-jump a:hover{background:var(--accent-soft)}.learn-jump a:last-child{margin-inline-start:auto;color:var(--accent-readable,#80456e)}
.learn-outcomes{padding:24px 28px;border-radius:18px;background:var(--accent-soft)}.learn-outcomes h3{font-size:16px;margin:0 0 16px}.learn-outcomes ul{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;list-style:none;margin:0;padding:0}.learn-outcomes li{display:flex;gap:10px;font-size:14px}.learn-outcomes .icon{margin-top:3px;color:var(--accent-readable,#80456e)}
.learn-section{padding-top:44px}.learn-section-title{display:flex;gap:15px;align-items:center;margin-bottom:21px}.learn-section-title h3{margin:3px 0 0}.learn-number{font-size:13px;font-weight:650;display:grid;place-items:center;flex:none;width:42px;height:42px;border-radius:13px;background:var(--accent-soft);color:var(--accent-readable,#80456e)}
.learn-eyebrow{display:block;font-size:11px;font-weight:650;letter-spacing:.085em;text-transform:uppercase;color:var(--accent-readable,#80456e)}
.learn-notation{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.learn-notation-card{border:1px solid var(--line);background:var(--surface);border-radius:16px;padding:22px}.learn-glyph{font-family:'Doulos SIL',serif;font-size:40px;line-height:1.4;display:block;color:var(--accent-readable,#80456e);min-height:56px}.learn-notation-card h4{font-size:15px}.learn-notation-card p{font-size:13px;color:var(--muted)}
.learn-concepts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:20px;align-items:start}.learn-concept{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px}.learn-concept-index{font-size:11px;font-weight:650;color:var(--muted)}.learn-concept>p{font-size:14px;color:var(--muted);margin-bottom:20px}.learn-shell details{border-top:1px solid var(--line)}.learn-shell summary{display:flex;justify-content:space-between;gap:14px;align-items:center;list-style:none;padding:13px 0;font-size:13px;font-weight:650;line-height:1.45;color:var(--accent-readable,#80456e)}.learn-shell summary::-webkit-details-marker{display:none}.learn-shell summary .icon{width:14px;transition:transform .18s}.learn-shell details[open]>summary .icon{transform:rotate(180deg)}.learn-detail-body{font-size:14px;padding:2px 0 10px}.learn-example{border-radius:10px;padding:13px 15px;margin-top:12px;background:var(--canvas)}.learn-example p{font-size:12px;color:var(--muted);margin-top:5px}.learn-ipa{font-family:'Doulos SIL',serif;font-size:23px;line-height:1.55;direction:ltr;unicode-bidi:isolate;overflow-wrap:anywhere}
.learn-tutorial{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:start}.learn-steps{counter-reset:lesson;list-style:none;margin:0;padding:0}.learn-steps li{counter-increment:lesson;position:relative;padding-block:0 22px;padding-inline:43px 0}.learn-steps li:before{content:counter(lesson);position:absolute;inset-inline-start:0;top:0;width:27px;height:27px;display:grid;place-items:center;border-radius:50%;font-size:12px;background:var(--accent-soft);color:var(--accent-readable,#80456e)}.learn-steps h4{font-size:15px;margin:0 0 7px}.learn-steps p{font-size:14px;color:var(--muted)}
.learn-sample{border:1px solid var(--line);border-radius:18px;padding:28px;background:var(--surface)}.learn-sample-text{font-size:34px;padding:18px 0 8px}.learn-sample>p:not(.learn-ipa){color:var(--muted);font-size:14px}.learn-sample .learn-actions{margin-top:22px}.learn-copy-status{display:block;font-size:12px;color:var(--accent-readable,#80456e);min-height:20px;margin-top:7px}
.learn-pitfalls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:8px}.learn-pitfalls aside{border-inline-start:3px solid var(--accent);border-radius:0;border-start-end-radius:12px;border-end-end-radius:12px;padding:20px 24px;background:var(--accent-soft)}.learn-pitfalls h4{font-size:15px}.learn-pitfalls p{font-size:14px;color:var(--muted)}.learn-section-note{max-width:800px;color:var(--muted);font-size:14px}
.learn-quiz{margin-top:24px;padding:24px 28px;border-radius:18px;background:var(--surface);border:1px solid var(--line)}.learn-question{min-width:0;border:0;padding:0;margin:0 0 24px}.learn-question legend{font-size:15px;font-weight:600;padding:0 0 12px}.learn-question legend>span{color:var(--accent-readable,#80456e)}.learn-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:12px}.learn-options label{display:flex;align-items:flex-start;gap:9px;border:1px solid var(--line);border-radius:10px;padding:13px;font-size:14px;cursor:pointer}.learn-options label:hover,.learn-options label:has(input:checked){background:var(--accent-soft);border-color:var(--accent)}.learn-options input{flex:none;margin:4px 0 0;accent-color:var(--accent-readable,#80456e)}.learn-answer summary{font-size:12px}.learn-feedback{font-size:14px;padding:12px 15px;border-radius:10px;border-inline-start:3px solid var(--accent);background:var(--accent-soft)}.learn-quiz-actions{display:flex;align-items:center;flex-wrap:wrap;gap:10px}.learn-score{font-size:13px;margin:0!important;margin-inline-start:6px!important}.learn-score:focus{outline:none}
.learn-writing{padding:28px;margin-top:20px;border:1px solid var(--line);border-radius:18px;background:var(--surface)}.learn-writing>p{color:var(--muted);font-size:14px}.learn-writing-task+.learn-writing-task{margin-top:25px}.learn-writing-task label{display:block;font-size:14px;font-weight:600;margin:0 0 10px}.learn-writing-task textarea{display:block;width:100%;resize:vertical;background:var(--canvas);color:var(--ink);border:1px solid var(--line);border-radius:10px;padding:13px 15px;font-family:'Doulos SIL',serif;font-size:20px;margin-bottom:12px}.learn-writing-task textarea::placeholder{font-family:var(--font-body);font-size:13px;color:var(--muted)}
.learn-reference-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}.learn-professional p{font-size:14px}.learn-text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:650;color:var(--accent-readable,#80456e);text-decoration:underline;text-underline-offset:4px}.learn-shell .learn-small{font-size:12px;line-height:1.65;color:var(--muted);margin-top:12px}.learn-sources{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px}.learn-sources h4{margin:0 0 15px;font-size:15px}.learn-sources ul{padding:0;margin:0;list-style:none}.learn-sources li+li{margin-top:16px}.learn-sources a{font-size:13px;font-weight:600;display:inline-flex;gap:7px;align-items:center;color:var(--accent-readable,#80456e)}.learn-sources .icon{width:13px}.learn-sources p{font-size:12px;color:var(--muted);margin-top:4px}
.learn-related{margin-top:34px;padding-top:24px;border-top:1px solid var(--line)}.learn-related h4{font-size:15px}.learn-related>div{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.learn-related a{display:inline-flex;gap:12px;align-items:center;background:var(--surface);border:1px solid var(--line);padding:10px 14px;border-radius:10px;font-size:13px}.learn-related a:hover{border-color:var(--accent);background:var(--accent-soft)}
.learn-hub{padding-block:52px}.learn-hub-hero{display:grid;grid-template-columns:1.4fr 1fr;gap:70px;align-items:center;padding:24px 0 54px}.learn-hub h1{font-size:clamp(34px,3.6vw,50px);line-height:1.12;letter-spacing:-.04em;margin:20px 0}.learn-hub-hero .learn-actions{margin-top:26px}.learn-process{margin:0;padding:27px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(145deg,var(--surface),var(--accent-soft));text-align:center}.learn-process-line{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:10px;font-size:13px}.learn-process-label{font-size:10px;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-readable,#80456e)}.learn-process-arrow{display:block;margin:5px 0;color:var(--accent-readable,#80456e)}.learn-process-symbol{font-family:'Doulos SIL',serif;font-size:62px;line-height:1.3;background:var(--accent);color:var(--accent-ink,#2b1530);width:110px;height:110px;border-radius:50%;display:grid;place-items:center;margin:0 auto}.learn-process figcaption{font-size:11px;color:var(--muted);margin-top:20px}
.learn-hub-section{padding:34px 0}.learn-hub-section-heading{display:flex;gap:20px;justify-content:space-between;align-items:center;margin-bottom:24px}.learn-hub-section-heading h2{font-size:28px;margin:7px 0 0}.learn-hub-section-heading>p{font-size:14px;color:var(--muted);max-width:290px;margin:0}.learn-paths{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.learn-path{border:1px solid var(--line);border-radius:20px;padding:27px;background:var(--surface);position:relative}.learn-path h3{font-size:21px;margin:11px 0}.learn-path>p{font-size:14px;color:var(--muted)}.learn-path-number{display:block;font-size:28px;color:var(--accent-readable,#80456e);font-weight:600;margin-bottom:14px}.learn-path ol{padding:16px 0 0;margin:17px 0 0;list-style:none;counter-reset:path;border-top:1px solid var(--line)}.learn-path li{counter-increment:path;display:flex;gap:10px;align-items:center}.learn-path li:before{content:counter(path);font-size:11px;color:var(--muted)}.learn-path li a{flex:1;display:flex;align-items:center;justify-content:space-between;padding:7px 0;font-size:13px;font-weight:600}.learn-path li a:hover{color:var(--accent-readable,#80456e)}.learn-path li .icon{width:14px}
.learn-search{display:flex;align-items:center;gap:10px;width:330px;max-width:100%;padding:11px 15px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.learn-search input{width:100%;min-width:0;border:0;background:transparent;color:var(--ink);font-size:14px}.learn-search:focus-within{border-color:var(--accent-readable,#80456e)}.learn-search input:focus{outline:none}.learn-library-status{font-size:12px;color:var(--muted)}.learn-library{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.learn-topic{display:flex;flex-direction:column;padding:24px;border-radius:17px;border:1px solid var(--line);background:var(--surface);transition:border-color .18s,box-shadow .18s}.learn-topic:hover{border-color:var(--accent);box-shadow:0 5px 20px #00000008}.learn-topic-top{display:flex;gap:15px;align-items:center;justify-content:space-between;margin-bottom:17px}.learn-topic-glyph{font-family:'Doulos SIL',serif;color:var(--accent-readable,#80456e);font-size:28px;min-width:44px;min-height:44px;line-height:1.5;text-align:center;background:var(--accent-soft);border-radius:12px;padding:0 8px}.learn-topic h3{display:flex;align-items:center;justify-content:space-between;font-size:18px;margin:0 0 11px}.learn-topic h3 .icon{width:15px}.learn-topic>p{font-size:13px;color:var(--muted);flex:1}.learn-topic-meta{font-size:11px;color:var(--accent-readable,#80456e);margin-top:8px}.learn-no-results{padding:28px;border:1px solid var(--line);border-radius:15px;background:var(--surface);font-size:14px}.learn-study-note{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;background:var(--accent-soft);border-radius:22px;padding:34px;margin-top:32px}.learn-study-note h2{font-size:26px;margin:7px 0 17px}.learn-study-note h3{font-size:17px;margin:5px 0 15px}.learn-study-note p{font-size:14px}
@media(max-width:1000px){.learn-heading{display:block}.learn-heading>.learn-actions{padding-top:16px}.learn-concepts{gap:12px}.learn-concept{padding:18px}.learn-notation-card{padding:18px}.learn-hub-hero{gap:30px}.learn-path{padding:21px}.learn-library{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.learning-guide{padding-top:40px}.learn-shell h2{font-size:27px}.learn-intro{font-size:15px}.learn-outcomes ul{grid-template-columns:1fr;gap:12px}.learn-concepts,.learn-paths{grid-template-columns:1fr}.learn-notation{grid-template-columns:repeat(2,minmax(0,1fr))}.learn-tutorial,.learn-reference-grid,.learn-study-note{grid-template-columns:1fr;gap:20px}.learn-pitfalls{grid-template-columns:1fr}.learn-options{grid-template-columns:1fr}.learn-quiz,.learn-writing{padding:20px}.learn-hub-hero{grid-template-columns:1fr}.learn-process{max-width:450px;width:100%;margin:auto}.learn-hub-section-heading{align-items:flex-start;flex-direction:column}.learn-hub-section-heading>p{max-width:none}.learn-hub{padding-top:20px}.learn-jump{gap:3px}.learn-jump a{padding:7px 10px}.learn-jump a:last-child{margin-inline-start:0}.learn-path h3{font-size:20px}}
@media(max-width:480px){.learn-shell{font-size:14px}.learn-outcomes{padding:20px}.learn-library{grid-template-columns:1fr}.learn-notation-card{padding:15px}.learn-notation-card h4{font-size:14px}.learn-glyph{font-size:34px}.learn-section-title h3{font-size:21px}.learn-sample{padding:20px}.learn-pitfalls aside{padding:18px}.learn-hub-hero{padding-top:14px;padding-bottom:28px}.learn-study-note{padding:24px}.learn-quiz,.learn-writing{padding:17px}.learn-topic{padding:22px}}
@media(prefers-reduced-motion:reduce){.learn-shell *{transition:none!important}}
@media print{body.learn-printing{background:#fff;color:#111}.learn-printing .site-header,.learn-printing .site-footer,.learn-printing .type-keyboard-hero-band,.learn-printing #workspace,.learn-printing .skip-link,.learn-printing>dialog{display:none!important}.learn-printing .shell-main{padding:0}.learn-printing .learning-guide{max-width:none;width:100%;padding:0;margin:0;font-size:10pt}.learn-printing .learn-actions,.learn-printing .learn-jump,.learn-printing .learn-quiz-actions,.learn-printing .learn-copy-status{display:none!important}.learn-printing .learn-shell *{color:#111!important;box-shadow:none!important}.learn-printing .learn-shell a{text-decoration:underline}.learn-printing .learn-heading h2{font-size:23pt}.learn-printing .learn-section{padding-top:22px}.learn-printing .learn-concepts{display:block}.learn-printing .learn-concept{margin-top:12px;break-inside:avoid}.learn-printing .learn-question,.learn-printing .learn-writing-task,.learn-printing .learn-notation-card{break-inside:avoid}.learn-printing .learn-shell details>summary .icon{display:none}.learn-printing .learn-notation{grid-template-columns:repeat(2,1fr)}.learn-printing .learn-tutorial,.learn-printing .learn-reference-grid{display:block}.learn-printing .learn-sample,.learn-printing .learn-sources{margin-top:15px}.learn-printing .learn-writing-task textarea{height:70px}.learn-printing .learn-shell{--surface:#fff;--canvas:#fff;--accent-soft:#f8f8f8;--line:#ccc;--muted:#333}}

.learn-diagram{max-width:760px;margin:24px auto 0;padding:20px 24px;background:var(--surface);border:1px solid var(--line);border-radius:18px}.learn-diagram svg{display:block;width:100%;height:auto;overflow:visible;color:var(--ink)}.learn-diagram svg text{font-family:var(--font-body);font-size:14px;fill:var(--ink)}.learn-diagram figcaption{font-size:12px;color:var(--muted);text-align:center;max-width:610px;margin:10px auto 0}.learn-svg-line{stroke:var(--line);stroke-width:2;fill:none}.learn-svg-movement{stroke:var(--accent-readable,#80456e);stroke-width:4;stroke-linecap:round;stroke-linejoin:round;fill:none}.learn-svg-symbol circle,.learn-svg-panel{fill:var(--canvas);stroke:var(--line);stroke-width:1}.learn-diagram .learn-svg-symbol text{font-family:'Doulos SIL',serif;font-size:30px;text-anchor:middle}.learn-svg-accent circle,.learn-svg-fill{fill:var(--accent);stroke:none}.learn-diagram .learn-svg-accent text,.learn-diagram .learn-svg-ink{fill:var(--accent-ink,#2b1530)}.learn-diagram .learn-svg-ipa{font-family:'Doulos SIL',serif;font-size:35px}.learn-diagram .learn-svg-large{font-family:'Doulos SIL',serif;font-size:48px;text-anchor:middle}@media(max-width:480px){.learn-diagram{padding:16px 8px}.learn-diagram svg text{font-size:16px}.learn-diagram figcaption{padding:0 6px;text-align:start}}@media print{.learn-diagram{break-inside:avoid;max-width:520px}}

.learn-diagram-scroll{overflow-x:auto;border-radius:10px;scrollbar-width:thin;scrollbar-color:var(--accent) transparent}.learn-diagram-scroll:focus-visible{outline:2px solid var(--accent-readable,#80456e);outline-offset:3px}@media(max-width:480px){.learn-diagram svg{min-width:520px}}@media print{.learn-diagram-scroll{overflow:visible}.learn-diagram svg{min-width:0}}
@media print{.learn-printing .learn-shell{--ink:#111;--accent:#E198C9;--accent-ink:#2b1530;--accent-readable:#80456e}}
/* Match the answer colors used by i2Bopomo's Zhuyin lessons. */
.learn-shell{--learn-success:#17683a;--learn-error:#c52237}
:root[data-appearance="dark"] .learn-shell{--learn-success:#9ce3b5;--learn-error:#ff9ca6}
.learn-feedback[data-correct="true"],.learn-score[data-correct="true"]{color:var(--learn-success);font-weight:600}
.learn-feedback[data-correct="false"],.learn-score[data-correct="false"]{color:var(--learn-error);font-weight:600}
.learn-feedback[data-correct]{border-inline-start-color:currentColor;background:transparent}
.learn-feedback:not([data-correct]){color:var(--muted);border-inline-start-color:var(--line);background:var(--canvas)}

/* Converter lessons pair a copyable source passage with the reviewed IPA. */
.learn-sample .learn-source-text{font-family:var(--font-body);font-size:17px;line-height:1.7;color:var(--ink);white-space:pre-wrap;padding:14px 0 0}
.learn-sample-result{margin:18px 0;padding:18px;border:1px solid color-mix(in srgb,var(--accent) 50%,var(--line));border-radius:12px;background:var(--accent-soft)}
.learn-sample-result .learn-ipa{font-size:26px;line-height:1.6;margin-top:10px;white-space:pre-wrap}
@media(max-width:480px){.learn-sample-result{padding:15px}.learn-sample-result .learn-ipa{font-size:23px}}
@media print{.learn-printing .shell-main>:not(.learning-guide){display:none!important}}


/* Editorial localization: examples keep their own direction; lesson prose follows its locale. */
.learn-shell[dir="rtl"] :is(h1,h2,h3,h4,.learn-kicker,.learn-eyebrow){letter-spacing:0}
.learn-shell[dir="rtl"] :is(.learn-kicker,.learn-text-link,.learn-related a,.learn-topic h3,.learn-path li a,a.learn-primary)>.icon:last-child{transform:rotate(180deg)}
.learn-shell[dir="rtl"] .learn-topic h3,.learn-shell[dir="rtl"] .learn-heading h2{line-height:1.55}
.learn-shell .learn-model-answer{font-family:var(--font-body),'Doulos SIL',serif;font-size:15px;line-height:1.75;direction:inherit;unicode-bidi:plaintext;white-space:pre-wrap}
.learn-diagram svg{direction:ltr;unicode-bidi:isolate}
.learn-diagram [data-fit-width]{unicode-bidi:plaintext}
.learn-shell[dir="rtl"] .learn-diagram figcaption{text-align:start}

/* Keep IPA order intact while aligning standalone notation with RTL card prose. */
.learn-shell[dir="rtl"] .learn-glyph{text-align:end}

/* Empty practice fields follow the interface; typed IPA still uses dir=auto. */
.learn-writing-task textarea:placeholder-shown{direction:inherit;text-align:start}