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@media(max-width:850px){.workspace{grid-template-columns:minmax(0,1fr) 230px;gap:18px}.side-card{padding:18px}.all-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.toolbar{align-items:flex-end}.toolbar-label{display:block}.toolbar-label select{display:block;margin-top:7px}.page-top{gap:10px}.total strong{font-size:2rem}}
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@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.class-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px}.class-grid .side-card{margin:0}.class-grid .fullwidth{margin-top:18px}.pair-table{width:100%;border-collapse:collapse;text-align:left}.pair-table td,.pair-table th{padding:12px;border-bottom:1px solid var(--line)}.pair-table td{font-size:1.7rem;line-height:1.8}.class-grid+.side-card{margin-top:20px}@media(max-width:680px){.class-grid{grid-template-columns:1fr}.tabs{flex-wrap:wrap}.tabs button{flex:1 0 45%}.tabs button span{font-size:1rem}}

.word-picture{width:90px;height:90px;display:flex;align-items:center;justify-content:center;background:#fffced;border:1px solid var(--line);border-radius:16px;flex-shrink:0}.picture-crop{display:block;position:relative;overflow:hidden;max-width:78px;max-height:78px}.picture-crop img{position:absolute;max-width:none;height:auto;display:block}@media(max-width:680px){.word-picture{width:90px;height:90px}.association{gap:12px}}

.voiced-note{display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-size:.875rem;line-height:1.65;color:var(--ink);margin:4px 0 10px}.voiced-wave{font-size:1.25rem;line-height:1;font-weight:700}

.mnemonic-card{margin-bottom:24px}.mnemonic-sentence{font-size:1.5rem;line-height:1.8;margin:14px 0;color:var(--ink)}.mnemonic-audio{display:flex;gap:8px;flex-wrap:wrap}.mnemonic-audio svg{width:18px;height:18px}.mnemonic-grid{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));gap:8px;margin:18px 0}.mnemonic-grid>div{display:flex;flex-direction:column;align-items:center;gap:5px;font-size:1.25rem;line-height:1.7}.mnemonic-arrow{font-size:.875rem;color:var(--muted)}.mnemonic-explanation{margin-top:12px;font-size:.875rem;line-height:1.75}.mnemonic-explanation summary{cursor:pointer}.sidebar .mnemonic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}@media(max-width:600px){.mnemonic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}

.mnemonic-sentence [data-cue-index]{display:inline-block;border-radius:6px;padding:0 4px}.mnemonic-grid>div{border-radius:10px;padding:6px 2px;border:2px solid transparent}.mnemonic-sentence .cue-active,.mnemonic-grid>.cue-active{background:var(--lime);color:var(--ink);box-shadow:inset 0 -3px 0 var(--ink)}.mnemonic-grid>.cue-active{border-color:var(--ink)}.mnemonic-grid>.cue-active .mini-letter{background:var(--ink);color:var(--lime)}.mnemonic-divider{color:var(--muted);font-size:1rem}

.mnemonic-translation{font-size:1rem;line-height:1.8;margin:0 0 16px;color:var(--ink)}.mnemonic-translation>span{font-size:.875rem;color:var(--muted)}.mnemonic-grid .mnemonic-gloss{font-size:.875rem;line-height:1.6;text-align:center;color:var(--text)}

.low-mnemonic .mnemonic-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;margin:10px 0}.low-mnemonic-group{border-top:1px solid var(--line);margin-top:16px;padding-top:10px}.low-mnemonic-group h4{font-size:.875rem;color:var(--muted);margin:0}.low-mnemonic .mnemonic-audio{margin-top:14px}.low-mnemonic .mnemonic-grid>div{min-width:0;font-size:1.125rem}.sidebar .low-mnemonic{padding-left:12px;padding-right:12px}.low-mnemonic .mnemonic-gloss{overflow-wrap:anywhere}

[hidden]{display:none!important}.subject-switch{display:flex;gap:8px;margin-bottom:24px}.subject-switch button{border:1px solid var(--line);border-radius:12px;background:white;color:var(--ink);font-size:1rem;padding:12px 20px;min-height:48px}.subject-switch button.active{background:var(--ink);color:var(--lime);border-color:var(--ink)}.vowel-intro{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:22px}.vowel-intro .pill{white-space:nowrap;font-size:.875rem}.vowel-toolbar{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;margin-bottom:18px}.vowel-toolbar .mode-list{margin:0}.vowel-speed{display:flex;align-items:center;gap:8px;font-size:.875rem}.vowel-compare{background:#eaf1e5;border:1px solid var(--line);border-radius:16px;padding:20px;margin-bottom:20px;line-height:1.75}.vowel-compare>.btn{margin-top:12px}.vowel-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.vowel-card{background:white;border:2px solid var(--line);border-radius:22px;overflow:hidden}.vowel-card.vowel-current{border-color:var(--ink);box-shadow:0 0 0 4px var(--lime)}.vowel-card-top{background:var(--ink);color:var(--lime);padding:20px;text-align:center}.vowel-kind{font-size:1rem;color:#effadf}.vowel-form{font-size:5.5rem;line-height:1.7;font-family:"Thonburi","Noto Sans Thai",sans-serif}.vowel-roman{font-size:1.25rem}.vowel-card-body{padding:22px}.vowel-name{font-size:1.5rem;line-height:1.9;overflow-wrap:anywhere}.vowel-audio{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.vowel-audio .btn,.vowel-compare .btn,.vowel-practice>.btn{font-size:.9375rem}.vowel-audio svg,.vowel-compare svg,.vowel-practice svg{width:18px;height:18px;flex-shrink:0}.vowel-tip{font-size:1rem;line-height:1.8}.vowel-position{display:flex;gap:18px;align-items:center;border-top:1px solid var(--line);margin-top:18px;padding-top:18px}.vowel-example{font-size:2.5rem;line-height:1.8;white-space:nowrap}.vowel-example span{color:#285e4d;background:var(--lime);border-radius:6px}.vowel-position p{font-size:.875rem;color:var(--muted);line-height:1.8}.vowel-details{font-size:.875rem;line-height:1.85;margin-top:16px}.vowel-details summary{cursor:pointer}.vowel-mark{margin-top:20px;width:100%}.vowel-practice{margin-top:26px}.vowel-practice>.btn{margin-top:14px}.vowel-answers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:20px}.vowel-answer{flex-direction:column}.vowel-answer>span{font-size:2.8rem;line-height:1.7}.vowel-answer small{font-size:.875rem}.vowel-answer:disabled{opacity:1}.vowel-correct{background:#e4f1d7;border-color:#40662c}.vowel-wrong{background:#fff0ea;border-color:#a34c37}.vowel-feedback{margin-top:18px;line-height:1.8}.vowel-source{padding:18px;border-top:1px solid var(--line)}@media(max-width:650px){.vowel-card-grid{grid-template-columns:1fr}.vowel-intro{flex-direction:column;gap:10px}.vowel-form{font-size:4.75rem}.vowel-card-body{padding:18px}.vowel-toolbar .mode-list{flex-wrap:wrap}.subject-switch button{flex:1;padding:12px 10px}.vowel-position{gap:12px}}

.vowel-pairs{margin:16px 0;flex-wrap:wrap;gap:8px}.vowel-card.obsolete .vowel-card-top{background:#eef0ed;color:#606760}.vowel-card.obsolete .vowel-form{color:#717771}.vowel-form{font-size:clamp(3.3rem,10vw,5.5rem);line-height:1.7}.vowel-card-top{min-height:240px;height:auto}.vowel-name{overflow-wrap:anywhere}

.vowel-card.obsolete .vowel-kind{color:#606760}

.vowel-practice-entry{border:2px solid var(--ink);font-weight:700}.vowel-practice-entry:hover{background:var(--lime)}

.study-controls{display:flex;flex-wrap:wrap;gap:8px}.study-head{display:grid;grid-template-columns:1fr 1fr;text-align:center;font-weight:700;margin:18px 0 6px}.study-row{margin-bottom:24px}.study-row-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:12px 0}.study-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.study-card .vowel-card-top{min-height:0;padding:12px 8px}.study-card .vowel-form{font-size:clamp(2.8rem,8vw,4.5rem)}.study-card .vowel-card-body{padding:12px}.study-card .vowel-audio{margin:0;display:grid;gap:8px}.study-card .vowel-audio .btn{font-size:.85rem;padding:10px 6px;min-height:44px}.study-card .vowel-roman{font-size:1rem}.study-card .vowel-mark{font-size:.85rem;padding:10px 6px}.study-row-title .btn{font-size:.85rem}.study-row-title svg{width:18px;height:18px}.study-card .vowel-kind{font-size:.8rem}
.reading-intro,.reading-toolbar,.reading-lesson-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:22px}.reading-intro .sub{margin:0}.reading-consonants{display:flex;gap:8px;flex-wrap:wrap}.reading-consonants .btn{flex-direction:column;gap:0;min-width:48px;padding:8px 14px}.reading-consonants [lang=th]{font-size:1.8rem;line-height:1.5}.reading-consonants small{font-size:.65rem}.reading-lesson,.reading-table-section{background:white;border:1px solid var(--line);border-radius:22px;padding:24px}.reading-equation{display:grid;grid-template-columns:minmax(0,1fr) 30px minmax(0,1fr);gap:12px;max-width:520px;margin:26px auto 20px;align-items:center}.reading-part{text-align:center;border:2px solid var(--line);border-radius:18px;padding:14px 8px;min-width:0}.reading-part strong{display:block;font-family:"Thonburi","Noto Sans Thai",sans-serif;font-size:clamp(2.4rem,8vw,4rem);line-height:1.9;font-weight:400}.reading-plus{text-align:center;font-size:1.6rem;color:var(--muted)}.reading-result{text-align:center;border:2px solid var(--ink);border-radius:20px;background:var(--ink);color:white;padding:22px 14px;max-width:520px;margin:0 auto}.reading-result .small-label{color:#d4e1db}.reading-syllable{font-family:"Thonburi","Noto Sans Thai",sans-serif;font-size:clamp(3.5rem,12vw,6rem);line-height:1.8}.read-vowel-ink{color:#285e4d}.reading-result .read-vowel-ink{color:var(--lime)}.reading-part.vowel-current,.reading-result.vowel-current{border-color:#659044;box-shadow:0 0 0 4px var(--lime)}.reading-audio,.reading-navigation{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.reading-audio svg{width:18px;height:18px}.reading-navigation{justify-content:space-between;margin-bottom:20px}.reading-syllable-list{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.reading-syllable-list .btn{font-size:1.5rem;min-width:56px;padding:10px}.reading-syllable-list .active{border:2px solid var(--ink);background:#eaf1e5}.reading-table-scroll{max-width:100%;overflow:auto;border:1px solid var(--line);border-radius:12px;margin-top:20px}.reading-table{border-collapse:separate;border-spacing:0;width:100%;font-size:1.4rem}.reading-table th,.reading-table td{border-right:1px solid var(--line);border-bottom:1px solid var(--line);text-align:center;padding:0}.reading-table th{padding:10px;background:#eef3ed;font-weight:400;min-width:85px}.reading-table th:first-child{position:sticky;left:0;z-index:1;min-width:50px;background:#e1eadf}.reading-table th small{display:block;font-size:.7rem;white-space:nowrap}.reading-table td button{border:0;background:white;color:var(--ink);display:block;width:100%;min-width:85px;min-height:90px;padding:14px 8px;cursor:pointer;font:inherit}.reading-table td button small{display:block;font-size:.65rem;color:var(--muted)}.reading-table .reading-row-selected td button{background:#f3f7ef}.reading-table td button.vowel-current{background:var(--lime);box-shadow:inset 0 0 0 3px #446b2f}.reading-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:22px 0}.reading-options .btn{font-size:2.1rem;padding:16px 6px;line-height:1.7}.reading-options .btn:disabled{opacity:1}.reading-quiz .vowel-feedback{margin-bottom:22px}.reading-quiz>.btn svg{width:18px;height:18px}.reading-notes{padding:20px 0;margin-top:20px}.reading-quiz-config{margin-top:20px}.reading-quiz h2{margin-bottom:18px}@media(max-width:650px){.subject-switch{gap:6px}.subject-switch button{padding:10px 6px;font-size:.85rem}.reading-lesson,.reading-table-section{padding:16px}.reading-audio .btn{flex:1;font-size:.9rem;padding:12px 8px}.reading-navigation{gap:6px}.reading-navigation .btn{padding:12px 8px;font-size:.85rem}.reading-options{gap:8px}.reading-consonants{gap:6px}.reading-consonants .btn{padding:6px 10px;min-width:42px}.reading-lesson-heading h2{font-size:1.25rem}}

.reading-table th:has(.reading-header-audio){padding:0}.reading-table .reading-header-audio{display:block;width:100%;min-width:64px;min-height:90px;padding:12px 8px;border:0;background:transparent;color:var(--ink);font:inherit;cursor:pointer}.reading-table .reading-header-audio span{display:block;line-height:1.8}.reading-table .reading-header-audio small{font-size:.75rem;line-height:1.6}.reading-table .reading-header-audio:hover{background:#dce9d5}.reading-table .reading-header-audio.vowel-current{background:var(--lime);box-shadow:inset 0 0 0 3px #446b2f}.reading-table button:focus-visible{outline:3px solid #446b2f;outline-offset:-3px}

.reading-table{--play-fill:#D7EBE2;--play-edge:#91B5A4;--play-text:#244B3F}
/* Let the cell own the highlight, including extra height from voiced labels. */
.reading-table th,.reading-table td{position:relative;height:116px;background:#fff}
.reading-table th{background:#eef3ed}
.reading-table td button{position:absolute;inset:0;height:100%;min-height:0;display:flex;align-items:center;justify-content:center;line-height:1.9;background:transparent}
.reading-table .reading-row-selected td{background:#F0F6F3}
.reading-table .reading-row-selected td button{background:transparent}
.reading-table th:has(>.vowel-current),.reading-table td:has(>.vowel-current){background:var(--play-fill);box-shadow:inset 0 0 0 2px #8FBDA7,inset 0 0 14px rgba(131,209,173,.55),0 0 12px 2px rgba(145,202,179,.45)}
.reading-table td:has(>.vowel-current){z-index:0}
.reading-table th:has(>.vowel-current){z-index:2}
.reading-table td button.vowel-current,.reading-table .reading-header-audio.vowel-current{background:transparent;box-shadow:none;color:var(--play-text)}
.reading-table .reading-header-audio{height:100%;min-height:116px}
.reading-table button:active:not(:disabled){transform:none}
.reading-obsolete{color:#7D8984}

/* Larger vowel and syllable text, scoped to the reading table. */
.reading-table thead .reading-header-audio>span[lang="th"],.reading-table td button>span[lang="th"]{font-size:1.65rem;line-height:1.9;white-space:nowrap}
.reading-table thead .reading-header-audio small{font-size:.85rem}
.reading-table thead th:not(:first-child),.reading-table td{min-width:104px}

.alphabet-song{margin-top:28px;padding:20px;border:1px solid var(--line);border-radius:20px;background:#fff}.alphabet-song-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}.alphabet-song-heading h2{font-size:1.15rem}.alphabet-song-heading a{font-size:.875rem;color:var(--muted);text-underline-offset:3px}.alphabet-song-player{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:12px;background:#153d36}.alphabet-song-player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}@media(max-width:650px){.alphabet-song{padding:14px}}
/* Tone listening: preserve the established card palette and audio glow. */
.tone-toolbar,.tone-actions{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:20px 0}.tone-actions{justify-content:flex-start}.tone-cards{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;margin:24px 0}.tone-card{min-width:0;background:white;border:1px solid var(--line);border-radius:20px;padding:22px 14px;text-align:center;transition:background .16s,box-shadow .16s}.tone-card-heading h3{font-size:1.15rem}.tone-card-heading>span{display:block;color:var(--muted);font-size:.9rem;margin-top:4px}.tone-thai{font-size:2.8rem;line-height:1.9;margin-top:12px}.tone-roman{font-size:1.05rem;color:var(--muted)}.tone-card p{font-size:.9rem;line-height:1.7;min-height:3.4em;margin:8px 0 20px}.tone-card .btn{width:100%;min-height:48px}.tone-curve{width:100%;height:auto;margin-top:16px;overflow:visible}.tone-gridline{stroke:var(--line);stroke-width:1;fill:none}.tone-line{fill:none;stroke:var(--ink);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.tone-dot{fill:#759b2b;stroke:white;stroke-width:2;opacity:0}.tone-card:not(.vowel-current) .tone-dot{opacity:0!important}.tone-quiz{max-width:800px;margin:24px auto}.tone-quiz h2{margin-bottom:24px}.tone-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin:28px 0}.tone-options .btn{display:flex;flex-direction:column;gap:5px;min-height:80px}.tone-options small{color:var(--muted);font-size:.875rem}.tone-answer-card{max-width:280px;margin:20px auto}.tone-answer-card .tone-card p{min-height:0}.tone-quiz .mode-list{margin-bottom:20px}.tone-quiz>.sub{margin:16px 0}.tone-quiz .vowel-feedback{margin-bottom:24px}
@media(max-width:850px){.tone-cards{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:540px){.tone-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.tone-card{padding:18px 12px}.tone-thai{font-size:2.6rem}.tone-toolbar{align-items:flex-start}.tone-toolbar .sub{width:100%}}

.tone-card.vowel-current{border-color:var(--ink);box-shadow:0 0 0 4px var(--lime);background:#f5faed}.tone-card .btn svg,.tone-actions .btn svg,.tone-quiz .btn svg{width:18px;height:18px;flex-shrink:0}.subject-switch{flex-wrap:wrap}

button.tone-card{display:block;width:100%;color:var(--text);font:inherit;cursor:pointer}button.tone-card>.tone-card-heading,button.tone-card>.tone-thai,button.tone-card>.tone-roman,button.tone-card>.tone-hint{display:block}.tone-card-heading strong{font-size:1.15rem}.tone-hint{font-size:.9rem;line-height:1.7;min-height:3.4em;margin:8px 0 0}.tone-answer-card .tone-hint{min-height:0}@media(hover:hover){button.tone-card:hover{border-color:var(--ink)}}