/* The lesson occupies a stable viewport; optional settings open over it. */
body[data-view=studio]:has(.studio-exercise){display:flex;flex-direction:column;height:100svh}
body[data-view=studio]:has(.studio-exercise)>.site-header{flex:none}
body[data-view=studio]:has(.studio-exercise) #language-loading-error{flex:none;margin:4px 24px;padding:8px 12px;font-size:16px}
body[data-view=studio]:has(.studio-exercise) #workspace{flex:1;min-height:0;box-sizing:border-box}
body[data-view=studio]:has(.studio-exercise) #main{height:100%;min-height:0}
#studio-view:has(.studio-exercise){min-height:0}
body[data-view=studio]:has(.studio-exercise) .site-header{height:60px;min-height:60px;padding:8px 24px}
body[data-view=studio]:has(.studio-exercise) .site-header .brand{margin:0}
body[data-view=studio]:has(.studio-exercise) .site-utility-footer{display:none}
body[data-view=studio]:has(.studio-exercise) #workspace{padding:4px 24px 12px}
#studio-view:has(.studio-exercise){position:relative;display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-rows:32px 54px auto 18px 24px 66px minmax(220px,1fr);gap:6px;height:100%;padding:0;max-width:1160px;margin:auto;box-sizing:border-box}
#studio-view:has(.studio-exercise)>.studio-path{grid-row:1;grid-column:1;margin:0}
#studio-view:has(.studio-exercise)>.studio-path button{min-height:32px;padding:2px 0}
#studio-view:has(.studio-exercise)>.studio-heading{grid-row:2;grid-column:1/-1;display:flex;align-items:center;gap:14px;margin:0}
#studio-view:has(.studio-exercise) .studio-heading h1{font-size:30px;line-height:1.2;margin:0}
#studio-view:has(.studio-exercise) .studio-heading>p{display:none}
#studio-view:has(.studio-exercise) .studio-mode-icon{width:46px;height:46px;flex:none}
.studio-phonetics-toggle{display:inline-flex;align-items:center;justify-content:center;gap:10px;white-space:nowrap;margin-left:auto;font-size:18px;min-height:44px;padding:6px 14px}
.studio-phonetics-toggle [data-phonetics-state]{border-radius:20px;background:var(--soft);padding:3px 9px;font-size:16px;color:var(--ink)}
.studio-phonetics-toggle[aria-checked=true] [data-phonetics-state]{background:var(--pine);color:white}
#studio-view:has(.studio-exercise)>.studio-route-status{grid-row:3;grid-column:1/-1;margin:0;padding:4px 12px;min-height:50px;gap:10px;border-radius:14px}
#studio-view:has(.studio-exercise) .studio-route-meta{font-size:16px;line-height:1.3;flex-basis:auto;order:0}
#studio-view:has(.studio-exercise) .studio-route-status button{min-height:40px;padding:5px 12px;font-size:17px}
#studio-view:has(.studio-exercise)>.studio-study-options{position:absolute;top:0;right:0;width:260px;z-index:12;margin:0;max-height:calc(100svh - 90px);overflow:auto;box-shadow:0 12px 30px #16474312}
#studio-view:has(.studio-exercise) .studio-study-options>summary{min-height:32px;padding:4px 12px;font-size:17px}
#studio-view:has(.studio-exercise) .studio-study-options>summary::after{font-size:16px}
#studio-view:has(.studio-exercise) .studio-wait-settings{grid-template-columns:1fr}
#studio-view:has(.studio-exercise)>.studio-progress{grid-row:4;grid-column:1/-1;margin:0;gap:12px;align-items:center}
#studio-view:has(.studio-exercise)>.studio-item-meta{grid-row:5;grid-column:1/-1;margin:0;gap:12px;font-size:16px;line-height:1.4;white-space:nowrap;overflow:hidden}
#studio-view:has(.studio-exercise)>.studio-item-meta>span:first-child{overflow:hidden;text-overflow:ellipsis}
#studio-view:has(.studio-exercise)>.studio-automatic{grid-row:6;grid-column:1/-1;position:relative;margin:0;padding:6px 14px;gap:12px;border-radius:14px;min-height:66px;box-sizing:border-box}
#studio-view:has(.studio-exercise) .studio-automatic .studio-phase-label{font-size:18px;line-height:1.3}
#studio-view:has(.studio-exercise) .studio-automatic .studio-actions{display:flex;align-items:center;gap:10px}
#studio-view:has(.studio-exercise) .studio-pause-toggle{min-height:46px;padding:8px 18px;font-size:19px;white-space:nowrap}
.studio-shortcut{display:flex;align-items:center;justify-content:center;gap:7px;color:var(--muted);font-size:16px;line-height:1.3}
.studio-shortcut kbd{border:1px solid var(--line);border-bottom-width:3px;border-radius:7px;background:var(--surface);padding:4px 8px;font:inherit;color:var(--ink)}
#studio-view:has(.studio-exercise)>.studio-exercise{grid-row:7;grid-column:1/-1;display:block;margin:0;min-width:0;min-height:220px;width:100%;height:100%;border:1px solid var(--line);border-radius:22px;background:var(--surface);box-shadow:0 10px 30px #16474308;overflow:visible}
#studio-view:has(.studio-exercise)>.studio-exercise>.studio-task{height:100%;box-sizing:border-box;min-height:0;display:flex;flex-direction:column;justify-content:center;gap:10px;border:0;border-radius:22px;padding:20px 28px;background:var(--surface)}
#studio-view .studio-prompt{padding:0 0 12px;min-height:0;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent}
#studio-view .studio-prompt .studio-phrase{font-size:30px;line-height:1.4;margin:8px 0}
#studio-view .studio-prompt-audio{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
#studio-view .studio-prompt-audio .studio-speech-status:empty{display:none}
#studio-view .studio-exercise-automatic .studio-prompt{display:none}
#studio-view .studio-exercise-automatic .studio-task>.studio-eyebrow{display:none}
#studio-view .studio-task>h2{font-size:26px;line-height:1.4;margin:0}
#studio-view .studio-task>.studio-note{margin:0}
#studio-view .studio-exercise-automatic[data-study-phase=answer] .studio-task>h2{display:none}
#studio-view .studio-answer{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 18px;padding:0;border:0;background:transparent;width:100%;min-width:0}
#studio-view .studio-answer>p{grid-column:1;margin:0;line-height:1.4;overflow-wrap:anywhere}
#studio-view .studio-answer>.studio-eyebrow{display:none}
#studio-view .studio-answer>.studio-phrase{font-size:32px;font-weight:650}
#studio-view .studio-answer>.studio-example{font-size:28px;padding-top:12px;border-top:1px solid var(--line)}
#studio-view .studio-answer>.studio-phonetics{font-size:22px;color:var(--muted)}
#studio-view .studio-answer>.studio-meaning{font-size:24px;color:var(--ink)}
#studio-view .studio-answer>button{grid-column:2;align-self:center;min-height:48px;font-size:18px;white-space:nowrap}
#studio-view .studio-answer>button:first-of-type{grid-row:1 / span 3}
#studio-view .studio-answer>button:nth-of-type(2){grid-row:4 / span 3}
#studio-view:has(.studio-exercise)>.studio-note{display:none}
#studio-view:has(.studio-exercise)>.studio-stop{position:absolute;bottom:12px;right:12px;z-index:2;min-height:40px}
#studio-view .studio-countdown{position:absolute;bottom:4px;left:14px;width:calc(100% - 28px);display:flex;gap:8px;align-items:center;padding:0;border:0;background:transparent;font-size:16px;pointer-events:none}
#studio-view .studio-countdown[hidden]{display:none}
#studio-view .studio-countdown-track{flex:1;height:4px}
#studio-view .studio-audio-player .studio-shortcut{margin:12px 0}
.studio-audio-player{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto 40px 112px 64px 58px 30px 32px 48px auto auto;align-content:start;gap:12px;min-height:540px}
.studio-audio-player>.studio-audio-quick{grid-row:1}
.studio-audio-player>.studio-audio-visual{grid-row:2;margin:0;align-self:center}
.studio-audio-player>[data-audio-current]{grid-row:3;margin:0;align-self:center;max-height:112px;overflow:auto;font-size:30px;line-height:1.4}
.studio-audio-player>[data-audio-phonetics]{grid-row:4;display:block;margin:0;height:64px;overflow:auto;font-size:22px;line-height:1.4}
.studio-audio-player>[data-audio-phonetics][hidden]{visibility:hidden}
.studio-audio-player>.studio-audio-actions{grid-row:5;margin:0;align-self:center;display:grid;grid-template-columns:100px 190px 100px;justify-content:center;gap:12px}
.studio-audio-player>.studio-audio-actions button{width:100%;min-width:0;min-height:54px;white-space:nowrap}
.studio-audio-player>.studio-shortcut{grid-row:6;margin:0}
.studio-audio-player>.studio-audio-position{grid-row:7;margin:0}
.studio-audio-player>.studio-stop{grid-row:8;margin:0;align-self:center;justify-self:center}
.studio-audio-player>.studio-speech-status,.studio-audio-player>[data-studio-wait]{grid-row:9;margin:0}
@media(max-width:760px){
 body[data-view=studio]:has(.studio-exercise) .site-header{height:50px;min-height:50px;padding:4px 12px}
 body[data-view=studio]:has(.studio-exercise) #workspace{padding:4px 12px 8px}
 #studio-view:has(.studio-exercise){height:100%;grid-template-rows:32px 48px auto 18px 22px 76px minmax(220px,1fr);gap:5px}
 #studio-view:has(.studio-exercise) .studio-heading h1{font-size:25px}
 #studio-view:has(.studio-exercise) .studio-mode-icon{width:38px;height:38px}
 #studio-view:has(.studio-exercise)>.studio-heading{gap:8px}
 .studio-phonetics-toggle{font-size:16px;gap:6px;padding:5px 9px;min-height:42px}
 .studio-phonetics-toggle [data-phonetics-state]{font-size:14px;padding:3px 6px}
 #studio-view:has(.studio-exercise)>.studio-route-status{gap:4px 8px;padding:6px 10px}
 #studio-view:has(.studio-exercise) .studio-route-meta{display:none}
 #studio-view:has(.studio-exercise) .studio-route-progress,#studio-view:has(.studio-exercise) .studio-route-time{font-size:17px}
 #studio-view:has(.studio-exercise) .studio-route-status button{flex:1;min-height:38px;font-size:16px}
 #studio-view:has(.studio-exercise)>.studio-automatic{padding:6px 10px;flex-wrap:nowrap;align-items:center;gap:8px}
 #studio-view:has(.studio-exercise) .studio-automatic .studio-phase-label{font-size:16px;max-width:42%}
 #studio-view:has(.studio-exercise) .studio-automatic .studio-actions{display:grid;gap:3px;width:auto}
 #studio-view:has(.studio-exercise) .studio-pause-toggle{font-size:18px;padding:6px 12px;min-height:44px}
 #studio-view .studio-shortcut{font-size:13px}
 #studio-view .studio-shortcut kbd{display:none}
 #studio-view:has(.studio-exercise)>.studio-exercise>.studio-task{padding:16px 18px;gap:8px}
 #studio-view .studio-task>h2{font-size:24px}
 #studio-view .studio-answer{gap:6px 10px}
 #studio-view .studio-answer>.studio-phrase{font-size:28px}
 #studio-view .studio-answer>.studio-example{font-size:24px}
 #studio-view .studio-answer>.studio-phonetics{font-size:20px}
 #studio-view .studio-answer>.studio-meaning{font-size:22px}
 #studio-view .studio-answer>button{font-size:16px;padding:6px 10px;white-space:normal;max-width:84px}
}
/* Preserve readable overflow for unusually long content or magnified text. */
@media(max-height:600px){#studio-view:has(.studio-exercise){height:auto;min-height:calc(100svh - 62px)}}

.studio-default-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:12px 0;border-top:1px solid var(--line)}
.studio-default-controls button{min-height:44px;font-size:16px;padding:7px 12px}
.studio-default-controls .studio-note{flex-basis:100%;font-size:15px;margin:0}
.studio-audio-player>.studio-default-controls{grid-row:10;justify-content:center}
/* Keep the audio transport in the viewport; optional panels float over it. */
body[data-view=studio]:has(.studio-audio-player){display:flex;flex-direction:column;height:100svh}
body[data-view=studio]:has(.studio-audio-player) .site-header{flex:none;height:60px;min-height:60px;padding:8px 24px}
body[data-view=studio]:has(.studio-audio-player) #language-loading-error{flex:none;margin:4px 24px;padding:8px 12px;font-size:16px}
body[data-view=studio]:has(.studio-audio-player) #workspace{flex:1;min-height:0;padding:4px 24px 12px;box-sizing:border-box}
body[data-view=studio]:has(.studio-audio-player) #main{height:100%;min-height:0}
body[data-view=studio]:has(.studio-audio-player) .site-utility-footer{display:none}
#studio-view:has(.studio-audio-player){position:relative;display:grid;grid-template-rows:32px 64px minmax(360px,1fr);gap:6px;height:100%;min-height:0;max-width:1160px;margin:auto;padding:0;box-sizing:border-box}
#studio-view:has(.studio-audio-player)>.studio-path{grid-row:1;margin:0}
#studio-view:has(.studio-audio-player)>.studio-path button{min-height:32px;padding:2px 0}
#studio-view:has(.studio-audio-player)>.studio-heading{grid-row:2;margin:0;display:flex;align-items:center;gap:12px}
#studio-view:has(.studio-audio-player) .studio-heading h1{font-size:30px;margin:0}
#studio-view:has(.studio-audio-player) .studio-heading>p{display:none}
#studio-view:has(.studio-audio-player) .studio-mode-icon{width:46px;height:46px;flex:none}
#studio-view:has(.studio-audio-player)>.studio-audio-player{grid-row:3;height:100%;min-height:0;margin:0;padding:16px 24px;box-sizing:border-box;grid-template-rows:74px 28px minmax(80px,1fr) 48px 54px 24px 26px 44px;gap:6px}
#studio-view .studio-audio-player>.studio-audio-quick{padding-bottom:8px;gap:12px;grid-template-columns:repeat(3,minmax(0,1fr));align-items:center}
#studio-view .studio-audio-quick>.studio-field:last-child{grid-column:auto}
#studio-view .studio-audio-quick .studio-field{font-size:16px;gap:4px}
#studio-view .studio-audio-quick select{font-size:18px;height:42px}
#studio-view .studio-audio-player>[data-audio-current]{min-height:0;margin:0;max-height:100%;line-height:1.4;font-size:30px;display:block;overflow:auto}
#studio-view .studio-audio-player>[data-audio-phonetics]{height:48px;min-height:0;font-size:22px;line-height:1.4}
#studio-view .studio-audio-player>.studio-audio-actions button{min-height:54px;min-width:0;transform:none;font-size:20px}
#studio-view .studio-audio-player>.studio-shortcut{margin:0;font-size:16px}
#studio-view .studio-audio-player>.studio-audio-position{font-size:18px!important;line-height:1.4}
#studio-view .studio-audio-player>.studio-stop{position:absolute;right:18px;bottom:14px;min-height:42px}
#studio-view .studio-audio-player>.studio-speech-status,#studio-view .studio-audio-player>[data-studio-wait]{position:absolute;left:130px;right:120px;bottom:14px;margin:0;font-size:16px!important;line-height:1.4}
#studio-view:has(.studio-audio-player)>.studio-audio-advanced{position:absolute;right:0;top:0;width:420px;max-width:100%;z-index:12;margin:0;max-height:calc(100svh - 90px);overflow:auto;box-shadow:0 12px 30px #16474312}
#studio-view:has(.studio-audio-player)>.studio-audio-advanced:not([open]){width:auto}
#studio-view:has(.studio-audio-player)>.studio-audio-advanced>summary{font-size:17px;padding:4px 12px;min-height:32px}
#studio-view .studio-audio-settings>.studio-default-controls{grid-column:1/-1}
#studio-view:has(.studio-audio-player)>.studio-playlist{position:absolute;left:18px;bottom:12px;z-index:11;margin:0;max-height:55svh;overflow:auto;max-width:calc(100% - 36px)}
#studio-view:has(.studio-audio-player)>.studio-playlist>summary{font-size:16px;padding:8px 12px}
#studio-view:has(.studio-audio-player)>.studio-note{display:none}
/* The transport stays visible; configuration and the list share the settings panel. */
#studio-view:has(.studio-audio-player)>.studio-audio-player{grid-template-rows:28px minmax(80px,1fr) 48px 54px 40px 26px 60px}
#studio-view .studio-audio-player>.studio-audio-visual{grid-row:1}
#studio-view .studio-audio-player>[data-audio-current]{grid-row:2}
#studio-view .studio-audio-player>[data-audio-phonetics]{grid-row:3}
#studio-view .studio-audio-player>.studio-audio-actions{grid-row:4}
#studio-view .studio-audio-player>.studio-shortcut{grid-row:5;line-height:1.4;white-space:normal;align-self:center}
#studio-view .studio-audio-player>.studio-audio-position{grid-row:6}
#studio-view .studio-audio-player>.studio-speech-status,#studio-view .studio-audio-player>[data-studio-wait]{grid-row:7;position:static;max-width:none;line-height:1.4}
#studio-view .studio-audio-player>.studio-speech-status{align-self:start}
#studio-view .studio-audio-player>[data-studio-wait]{align-self:end}
#studio-view .studio-audio-player{position:relative}
#studio-view .studio-audio-player:has(>.studio-stop:not([hidden]))>.studio-speech-status,#studio-view .studio-audio-player:has(>.studio-stop:not([hidden]))>[data-studio-wait]{padding-right:80px}
#studio-view .studio-audio-advanced>.studio-audio-quick{padding:16px;gap:12px;grid-template-columns:repeat(3,minmax(0,1fr));font-size:16px}
#studio-view .studio-audio-advanced .studio-field{font-size:16px}
#studio-view .studio-audio-advanced>.studio-playlist{margin:12px}
@media(max-width:760px){body[data-view=studio]:has(.studio-audio-player) .site-header{height:50px;min-height:50px;padding:4px 12px}body[data-view=studio]:has(.studio-audio-player) #workspace{padding:4px 12px 8px}#studio-view:has(.studio-audio-player){grid-template-rows:32px 56px minmax(360px,1fr)}#studio-view:has(.studio-audio-player) .studio-heading h1{font-size:25px}#studio-view:has(.studio-audio-player) .studio-mode-icon{width:38px;height:38px}#studio-view:has(.studio-audio-player)>.studio-audio-player{padding:12px 14px;grid-template-rows:136px 24px minmax(80px,1fr) 48px 54px 24px 26px}#studio-view .studio-audio-player>.studio-audio-quick{grid-template-columns:1fr 1fr;gap:8px}#studio-view .studio-audio-quick>.studio-field:last-child{grid-column:1/-1}#studio-view .studio-audio-player>[data-audio-current]{font-size:26px}#studio-view .studio-audio-player>.studio-shortcut{font-size:14px}#studio-view .studio-audio-player>.studio-audio-actions button{font-size:18px}#studio-view:has(.studio-audio-player)>.studio-audio-advanced{width:calc(100% - 4px)}#studio-view:has(.studio-audio-player)>.studio-audio-advanced:not([open]){width:auto}#studio-view:has(.studio-audio-player) .studio-phonetics-toggle{margin-left:auto}}
@media(max-height:600px){#studio-view:has(.studio-audio-player){height:auto;min-height:calc(100svh - 62px)}}
@media(max-width:760px){#studio-view:has(.studio-audio-player)>.studio-audio-player{grid-template-rows:24px minmax(80px,1fr) 48px 54px 40px 26px 60px}#studio-view .studio-audio-advanced>.studio-audio-quick{grid-template-columns:1fr 1fr}#studio-view .studio-audio-player>.studio-shortcut{font-size:16px}}
@media(max-width:760px){.studio-audio-player{padding:18px 14px;gap:8px;grid-template-rows:auto 32px 112px 64px 58px 30px 32px 48px auto auto}.studio-audio-player>.studio-audio-actions{grid-template-columns:70px minmax(130px,160px) 70px;gap:8px}.studio-audio-player>[data-audio-current]{font-size:26px}.studio-audio-player>.studio-audio-actions button{font-size:18px;padding:8px}.studio-audio-player>.studio-audio-quick{grid-template-columns:1fr 1fr}.studio-audio-player>.studio-shortcut{font-size:14px}}