.study-duration-control{display:grid;gap:10px;margin:22px 0}
.study-duration-row{display:grid;grid-template-columns:48px minmax(90px,1fr) auto 48px;gap:10px;align-items:center}
.study-duration-row :is(input,button){min-height:52px;border:1px solid var(--line,#d9e5dd);border-radius:12px;background:var(--surface,#fff);color:var(--ink,#183e4a);font:inherit}
.study-duration-row input{width:100%;text-align:center;font-size:24px;font-weight:700;padding:8px}
.study-duration-row button{font-size:24px;padding:0}.study-duration-row button:hover{background:var(--soft,#edf4ec)}
.study-duration-presets{display:flex;gap:8px;flex-wrap:wrap}.study-duration-presets button{min-height:40px;border:1px solid var(--line,#d9e5dd);border-radius:24px;padding:7px 16px;background:var(--surface,#fff);color:var(--pine,#176e55);font:inherit;font-size:14px}
.study-duration-control p{margin:0}.study-duration-control :focus-visible{outline:3px solid var(--pine,#176e55);outline-offset:3px}
.studio-auto-example{display:flex;align-items:center;gap:9px;min-height:44px;font-size:14px}.studio-auto-example input{width:20px;height:20px;accent-color:var(--pine,#176e55)}
.selection-study-layout{display:block!important}.selection-study-custom{max-width:760px;margin:auto}.selection-study-individual{margin:20px auto 0;max-width:760px}
.selection-study-order>summary,.selection-study-individual>summary{display:flex;justify-content:space-between;align-items:center;min-height:52px;cursor:pointer;font-weight:700}
.selection-study-order>summary::after,.selection-study-individual>summary::after{content:'⌄'}.selection-study-order[open]>summary::after,.selection-study-individual[open]>summary::after{content:'⌃'}
.selection-study-simple-mode{display:grid;gap:8px;margin:20px 0}.selection-study-simple-mode select{width:100%;min-height:52px;border:1px solid var(--line);border-radius:12px;padding:12px;font:inherit;background:var(--surface);color:var(--ink)}
.selection-study-start .primary-button{width:100%}.selection-study-extras{max-width:760px;margin:18px auto;justify-content:center}
@media(max-width:480px){.study-duration-row{grid-template-columns:44px minmax(80px,1fr) auto 44px;gap:7px}.study-duration-presets button{padding:7px 12px}}

/* A calm content hierarchy: one task, its progress, then optional settings. */
.learning-studio-workspace{padding-top:8px}.learning-studio-workspace .studio-path{margin-bottom:12px}.learning-studio-workspace .studio-path button{min-height:36px;padding:6px 10px}
.study-duration-control{gap:12px;margin:26px 0 24px;padding:20px;background:var(--soft,#f1f6f3);border-radius:20px}
.study-duration-row{grid-template-columns:52px minmax(0,1fr) 52px;margin-top:12px}
.study-duration-readout{font-size:36px;line-height:1.25;font-weight:750;text-align:center;color:var(--ink);overflow-wrap:anywhere}
.study-duration-row button{border-radius:50%;width:52px;height:52px;background:var(--surface);transition:background .15s,transform .15s}
.study-duration-row button:active{transform:scale(.94)}
.study-duration-control>.studio-note{text-align:center;font-size:12px}
.study-duration-presets{justify-content:center;margin-top:6px}
.study-duration-presets button[aria-pressed=true]{background:var(--pine,#176e55);border-color:var(--pine,#176e55);color:white}
.study-duration-direct{font-size:13px;text-align:center;margin-top:4px}.study-duration-direct summary{min-height:36px;cursor:pointer;color:var(--pine)}
.study-duration-entry{display:flex;align-items:center;justify-content:center;gap:8px;margin:10px auto 0;max-width:240px}
.study-duration-entry input{min-width:0;width:180px;min-height:44px;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:18px;text-align:center;background:var(--surface);color:var(--ink)}
.studio-difficulty{border:0;padding:0;margin:22px 0 10px;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px}
.studio-difficulty legend{font-size:14px;font-weight:700;margin-bottom:12px}
.studio-difficulty-option{position:relative;display:grid;justify-items:center;align-content:center;gap:8px;min-height:86px;cursor:pointer;padding:12px 5px;border:1px solid var(--line);border-radius:14px;background:var(--surface);font-size:13px;color:var(--ink);transition:border-color .15s,background .15s,transform .15s}
.studio-difficulty-option input{position:absolute;opacity:0;width:1px;height:1px}.studio-difficulty-number{width:28px;height:28px;display:grid;place-items:center;border-radius:50%;background:var(--soft);font-weight:700}
.studio-difficulty-option:has(:checked){border-color:var(--pine);background:var(--soft);box-shadow:inset 0 0 0 1px var(--pine)}.studio-difficulty-option:has(:checked) .studio-difficulty-number{background:var(--pine);color:#fff}
.studio-difficulty-option:has(:focus-visible){outline:3px solid var(--pine);outline-offset:3px}.studio-difficulty-option:active{transform:scale(.97)}
.studio-difficulty-explanation{font-size:12px!important;margin:6px 0 26px!important}
.learning-studio-workspace .studio-path{margin:0 0 12px}.learning-studio-workspace .studio-heading{display:grid;grid-template-columns:64px minmax(0,1fr);gap:3px 16px;align-items:center;margin:0 0 18px}
.learning-studio-workspace .studio-heading h1{font-size:32px;line-height:1.2;margin:0;letter-spacing:-.04em}.learning-studio-workspace .studio-heading>p{grid-column:2;margin:0;font-size:15px}
.studio-mode-icon{grid-row:1/3;display:grid;place-items:center;width:64px;height:64px;color:#204d62}.studio-mode-icon svg{width:64px;height:64px}
.learning-studio-workspace .studio-route-status{padding:8px 14px;min-height:52px;margin:0 0 10px;gap:12px;border-radius:14px;font-size:13px;box-shadow:none}.learning-studio-workspace .studio-route-skip{min-height:36px;padding:6px 10px}
.learning-studio-workspace .studio-route-meta{font-size:12px}.learning-studio-workspace .studio-route-time{font-size:14px}.learning-studio-workspace .studio-route-skip{font-size:13px}
.studio-study-options{margin:0 0 10px;font-size:13px}.studio-study-options>summary{cursor:pointer;min-height:36px;display:flex;align-items:center;justify-content:flex-end;gap:8px;color:var(--pine)}.studio-study-options>summary:after{content:'⌄'}.studio-study-options[open]>summary:after{content:'⌃'}
.studio-study-options[open]{padding:0 16px 12px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}.studio-study-options .studio-controls{margin:8px 0 12px}.studio-study-options .studio-note{font-size:12px;margin:8px 0}
.learning-studio-workspace .studio-progress{margin:0 0 8px;gap:16px;font-size:12px}.learning-studio-workspace .studio-progress progress{height:4px}.learning-studio-workspace .studio-progress>span{white-space:nowrap}
.learning-studio-workspace .studio-item-meta{font-size:12px;margin:0 0 12px;gap:10px}.learning-studio-workspace .studio-item-meta>span:first-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.learning-studio-workspace .studio-item-meta>span:last-child{white-space:nowrap}
.learning-studio-workspace .studio-automatic{display:grid;grid-template-columns:1fr auto;align-items:center;gap:4px 16px;padding:12px 16px;margin:0 0 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface);box-shadow:none}
.learning-studio-workspace .studio-automatic h2{font-size:12px;margin:0;color:var(--muted,#637e86)}
.learning-studio-workspace .studio-automatic .studio-actions{grid-column:2;grid-row:1/3;display:flex;align-items:center;margin:0;gap:8px}.learning-studio-workspace .studio-automatic .studio-actions>button{min-height:42px;width:auto;min-width:96px;padding:9px 16px;margin:0;font-size:14px}
.learning-studio-workspace .studio-automatic .studio-note{grid-column:1;margin:0;font-size:14px;color:var(--pine);line-height:1.6}.learning-studio-workspace .studio-automatic .studio-field{max-width:120px;font-size:12px}.learning-studio-workspace .studio-automatic .studio-field select{min-height:40px}
.learning-studio-workspace .studio-exercise{margin-top:0;gap:20px}.learning-studio-workspace .studio-prompt,.learning-studio-workspace .studio-task{padding:26px;min-height:280px;border-radius:20px}.learning-studio-workspace .studio-phrase{font-size:32px;line-height:1.5;margin:22px 0}.learning-studio-workspace .studio-task h2{font-size:20px;margin:16px 0}
.learning-studio-workspace .studio-audio-player{padding:24px 30px 28px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(145deg,var(--surface,#fff),var(--soft,#f0f6f3));box-shadow:0 12px 30px #183e4a05}
.learning-studio-workspace .studio-audio-quick{padding:0 0 20px;border-bottom:1px solid var(--line);gap:16px;margin:0}.learning-studio-workspace .studio-audio-quick .studio-field>span{font-size:12px;font-weight:600}.learning-studio-workspace .studio-audio-quick select{min-height:44px;background:var(--surface);border-radius:12px}
.studio-audio-visual{height:66px;display:flex;justify-content:center;align-items:center;gap:5px;margin:20px auto 0}.studio-audio-visual>span{width:5px;height:20px;background:var(--pine);border-radius:8px;opacity:.35}.studio-audio-visual>span:nth-child(2n){height:36px}.studio-audio-visual>span:nth-child(3n){height:48px}
.studio-audio-player[data-playing=true] .studio-audio-visual>span{opacity:.65;animation:audio-breathe 1s ease-in-out infinite alternate}.studio-audio-player[data-playing=true] .studio-audio-visual>span:nth-child(2n){animation-delay:-.3s}.studio-audio-player[data-playing=true] .studio-audio-visual>span:nth-child(3n){animation-delay:-.65s}
@keyframes audio-breathe{from{transform:scaleY(.55)}to{transform:scaleY(1)}}
.learning-studio-workspace .studio-audio-player .studio-phrase{font-size:26px;margin:12px auto 20px;min-height:40px;max-width:760px;color:var(--ink);line-height:1.5;text-align:center}.learning-studio-workspace .studio-audio-player .studio-phrase[data-empty=true]{font-size:21px;font-weight:600}
.learning-studio-workspace .studio-audio-actions{margin:0;gap:12px;justify-content:center;align-items:center}.learning-studio-workspace .studio-audio-actions>button{min-height:48px;padding:10px 24px}.learning-studio-workspace .studio-audio-actions .primary-button{border-radius:28px;min-width:180px;box-shadow:0 5px 12px #176e5515}.studio-audio-actions .primary-button:before{content:'▶';font-size:11px;margin-inline-end:10px}
.studio-audio-player[data-playing=true] .studio-audio-actions .primary-button:before{content:'Ⅱ';font-size:14px}
.learning-studio-workspace .studio-audio-position{margin:14px 0 0;text-align:center;font-size:12px}.learning-studio-workspace .studio-audio-player .studio-speech-status{margin:8px 0 0;text-align:center}.studio-audio-player .studio-phonetics{text-align:center}
.learning-studio-workspace .studio-audio-advanced{margin:16px 0;border-radius:16px;background:var(--surface)}.learning-studio-workspace .studio-audio-advanced>summary{font-size:14px;min-height:56px;padding:16px 20px;color:var(--ink);cursor:pointer}
.learning-studio-workspace .studio-audio-settings{display:block;padding:0 20px 20px}.studio-audio-group{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:18px 0 24px;border:0;padding:0}.studio-audio-group legend{font-size:14px;font-weight:700;margin-bottom:14px}.studio-audio-group .studio-field>span{font-size:12px}.studio-audio-settings>.studio-note{font-size:12px;max-width:680px}
.home-language-settings.home-language-visible{max-width:1680px;margin:12px auto 4px;padding:0 28px;border:0;background:transparent;box-shadow:none}.home-language-visible .language-pair{display:grid;grid-template-columns:minmax(150px,230px) 24px minmax(150px,230px) 1fr;align-items:center;gap:12px;max-width:none;padding:12px 16px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}
.home-language-visible .site-language{display:grid;gap:4px;margin:0}.home-language-visible .site-language>span{font-size:11px;color:var(--muted,#637e86)}.home-language-visible .site-language select{width:100%;height:40px;min-height:40px;color:var(--ink);font:inherit;font-size:14px;border:1px solid var(--line);border-radius:9px;background-color:var(--surface);padding-inline-start:40px;padding-inline-end:24px;background-size:24px 18px;background-position:8px center;background-repeat:no-repeat}
.home-language-visible .language-arrow{display:grid;place-items:center}.home-language-visible .language-arrow svg{width:20px;height:20px}.home-language-visible .language-readiness-copy{grid-column:4;display:grid;gap:4px;justify-items:end;text-align:end}.home-language-visible .language-pair-readiness{font-size:12px;margin:0}.home-language-visible .language-pair-readiness-details{font-size:11px;margin:0}.home-language-visible .language-pair-readiness-details>summary{min-height:24px;padding:0;cursor:pointer}.home-language-visible .language-pair-readiness-details>p{max-width:560px;line-height:1.6}
body:has(#workspace:not([hidden]) #studio-view:not([hidden])) .home-language-visible{display:none}
@media(max-width:760px){
 .home-language-settings.home-language-visible{padding:0 18px;margin-top:8px}.home-language-visible .language-pair{grid-template-columns:minmax(0,1fr) 18px minmax(0,1fr);padding:10px 12px;gap:8px}.home-language-visible .language-readiness-copy{grid-column:1/-1;justify-items:start;text-align:start}.home-language-visible .site-language select{font-size:13px}
 .learning-studio-workspace .studio-heading{grid-template-columns:52px minmax(0,1fr);column-gap:12px}.learning-studio-workspace .studio-heading h1{font-size:27px}.studio-mode-icon,.studio-mode-icon svg{width:52px;height:52px}.learning-studio-workspace .studio-heading>p{font-size:13px}
 .learning-studio-workspace .studio-route-status{flex-wrap:wrap;gap:6px 12px}.learning-studio-workspace .studio-route-meta{order:4;flex-basis:100%}.learning-studio-workspace .studio-route-time{margin-inline-start:auto}.learning-studio-workspace .studio-route-skip{padding:0;min-height:36px}
 .learning-studio-workspace .studio-prompt,.learning-studio-workspace .studio-task{padding:20px;min-height:220px}.learning-studio-workspace .studio-phrase{font-size:27px}
 .learning-studio-workspace .studio-automatic{padding:10px 12px;gap:4px 10px}.learning-studio-workspace .studio-automatic .studio-note{font-size:12px}.learning-studio-workspace .studio-automatic .studio-actions{flex-wrap:wrap;justify-content:flex-end;max-width:190px}.learning-studio-workspace .studio-automatic .studio-actions>button{min-width:76px;padding:8px 12px;font-size:13px}
 .learning-studio-workspace .studio-audio-player{padding:18px 16px 22px}.learning-studio-workspace .studio-audio-quick{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.learning-studio-workspace .studio-audio-quick>.studio-field:last-child{grid-column:1/-1}.learning-studio-workspace .studio-audio-player .studio-phrase{font-size:22px}.learning-studio-workspace .studio-audio-player .studio-phrase[data-empty=true]{font-size:18px}
 .studio-audio-group{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.learning-studio-workspace .studio-audio-actions>button{padding:10px 14px}.learning-studio-workspace .studio-audio-actions .primary-button{min-width:140px}
}
@media(max-width:480px){.study-duration-control{padding:16px}.study-duration-row{grid-template-columns:48px minmax(0,1fr) 48px}.study-duration-row button{width:48px;height:48px}.study-duration-readout{font-size:32px}.study-duration-presets{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:5px}.study-duration-presets button{min-height:44px;padding:7px 3px;font-size:12px}.studio-difficulty{gap:5px}.studio-difficulty-option{min-height:80px;font-size:11px;border-radius:12px}.studio-difficulty-number{width:25px;height:25px}.studio-audio-group{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.study-duration-row button,.studio-difficulty-option{transition:none}.studio-audio-player[data-playing=true] .studio-audio-visual>span{animation:none}}