.teaching-screen{max-width:960px;margin:20px auto;padding:24px;background:#fffdf4;color:#173d32;border:3px solid #286248;border-radius:28px;box-shadow:0 8px 0 #173d3220;scroll-margin-top:16px}.teaching-screen[hidden]{display:none}.teaching-top,.teaching-progress,.teaching-actions{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.teaching-top span{font-size:1rem}.teaching-screen button,.teaching-screen a{font:inherit;min-height:48px;padding:10px 20px;border:2px solid #286248;border-radius:16px;background:#fff;color:#173d32;cursor:pointer;text-decoration:none}.teaching-screen button:focus-visible,.teaching-screen a:focus-visible{outline:4px solid #f3ae2d;outline-offset:3px}.teaching-screen button:disabled{cursor:default;opacity:.6}.teaching-progress{margin-top:22px;font-size:1rem}.teaching-screen progress{width:100%;height:12px;accent-color:#286248;margin:10px 0 22px}.teaching-intro{display:grid;grid-template-columns:240px 1fr;gap:32px}.teaching-character{text-align:center;background:#e9f4db;border-radius:24px;padding:24px 16px;align-self:start}.teaching-character>span{font-size:2rem;color:#285f42}.teaching-character h2{font-family:serif;font-size:7rem;line-height:1.4;margin:0 0 16px}.teaching-character small{display:block;font-size:.9rem;margin-top:10px}.teaching-copy h3{font-size:1rem;margin:0 0 8px;color:#476956}.teaching-copy p{font-size:1.4rem;line-height:1.65;margin:0 0 20px}.teaching-copy .teaching-example{font-size:1.6rem}.teaching-picture{width:220px;max-width:100%;margin:16px auto}.teaching-picture .picture-art{width:100%;height:190px;display:block;object-fit:contain}.teaching-parent{font-size:1rem;line-height:1.6;color:#496856;margin:24px 0}.teaching-actions{margin-top:24px}.teaching-screen .teach-primary{background:#236348;color:white;display:inline-block}.teaching-question{font-size:1.8rem;text-align:center;line-height:1.5;margin:12px 0 28px}.teaching-choices{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.teaching-choices button{font-size:2.4rem;min-height:110px}.teaching-choices button.is-correct{opacity:1;background:#d5efb7;border:4px solid #287043}.teaching-choices button.is-mistake{opacity:1;background:#fff0d1;border-style:dashed}.teaching-feedback{font-size:1.2rem;line-height:1.6;padding:20px 0}.teaching-screen #teach-help{font-size:1.2rem;line-height:1.7;border-top:1px solid #adc3ac}.teaching-summary{font-size:2rem;line-height:1.8}.teaching-screen h2:focus{outline:none}.teaching-screen #teach-body>p{line-height:1.8}@media(max-width:600px){.teaching-screen{padding:18px 14px;margin:14px 0;border-radius:20px}.teaching-intro{grid-template-columns:1fr;gap:20px}.teaching-character{padding:16px}.teaching-character h2{font-size:5rem;margin:0 0 10px}.teaching-character>span{font-size:1.8rem}.teaching-choices{gap:8px}.teaching-choices button{padding:8px;font-size:1.7rem;min-height:88px}.teaching-question{font-size:1.4rem}.teaching-copy p{font-size:1.2rem}.teaching-top span{width:100%}}
.is-teaching{overflow-y:auto}.is-teaching .app-shell{height:auto;min-height:100dvh;padding:105px 16px 28px}.is-teaching .app-header{top:18px}.is-teaching .teaching-screen{margin:0 auto}@media(max-width:600px){.is-teaching .app-shell{padding:85px 10px 20px}}
.teaching-screen [hidden]{display:none!important}
.tone-demo{display:flex;align-items:center;gap:20px;background:#e8f1ff;border:2px solid #a3c1e9;border-radius:20px;padding:12px 18px;margin:16px 0}.tone-demo svg{width:150px;height:100px;flex-shrink:0}.tone-demo path{fill:none;stroke-linecap:round;stroke-linejoin:round;stroke-width:7}.tone-guide{stroke:#b2c5df}.tone-trace{stroke:#225db0}.tone-demo strong{font-size:1.3rem}.teaching-copy .tone-demo p{font-size:1.1rem;margin:8px 0 0}.is-speaking .tone-trace{stroke-dasharray:1;animation:tone-follow 2.4s linear infinite}.teaching-screen .coach-start{width:100%;font-size:1.3rem}.teaching-character button{margin:5px}.teaching-screen #teach-audio-note{font-size:1rem;line-height:1.5;margin:14px 0;min-height:3em}.teaching-screen #teach-repeat{display:block;margin-top:16px}.audio-help{font-size:1rem;line-height:1.6;margin-top:16px}.audio-help summary{cursor:pointer;padding:10px 0}.teaching-screen #teach-listen{display:block;margin:12px auto;font-size:1.4rem}.teaching-screen #listen-status{text-align:center}.teaching-screen #listen-fallback{margin-bottom:16px}@keyframes tone-follow{from{stroke-dashoffset:1}to{stroke-dashoffset:0}}@media(prefers-reduced-motion:reduce){.is-speaking .tone-trace{animation:none;stroke-dasharray:none}}@media(max-width:600px){.tone-demo{gap:12px;padding:10px}.tone-demo svg{width:120px}}
.audio-help label,.audio-help select{display:block;margin:10px 0}.audio-help select{font:inherit;max-width:100%;min-height:48px;padding:8px 12px;border:2px solid #286248;border-radius:12px;background:white;color:#173d32}.audio-help hr{border:0;border-top:1px solid #cbd9c6;margin:18px 0}.audio-help p[role=status]{min-height:1.5em}