:root{--bg:#fff;--surface:#f3f7f5;--text:#1f2933;--muted:#4a5763;--brand:#0b6e4f;--brand-text:#fff;--border:#9aa7b2;--focus:#b45309;--read-size:21px;--read-letter:0em;--read-word:0em;--read-line:1.8;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){.app:not(.theme-light){--bg:#111a17;--surface:#1b2723;--text:#edf2ef;--muted:#b8c4bf;--brand:#4fc79b;--brand-text:#0b1f18;--border:#5f6f69;--focus:#fbbf24;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}.app.theme-dark{--bg:#111a17;--surface:#1b2723;--text:#edf2ef;--muted:#b8c4bf;--brand:#4fc79b;--brand-text:#0b1f18;--border:#5f6f69;--focus:#fbbf24;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*,:before,:after{box-sizing:border-box}html,body{margin:0;overflow-x:hidden}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Noto Sans,Arial,sans-serif}.app{background:var(--bg);min-height:100vh;color:var(--text);font-size:18px;line-height:1.5}.topbar{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:12px;padding:8px 16px;display:flex}.brand{color:var(--brand);font-weight:700}.screen{max-width:40rem;margin:0 auto;padding:24px 16px 48px}h1{margin:0 0 16px;font-size:1.6rem;line-height:1.25}h1:focus{outline:none}.reading{font-size:var(--read-size);letter-spacing:var(--read-letter);word-spacing:var(--read-word);line-height:var(--read-line);overflow-wrap:anywhere}.note{color:var(--muted)}button{font:inherit;cursor:pointer;border-radius:12px;min-width:48px;min-height:48px;padding:10px 20px}.primary{background:var(--brand);color:var(--brand-text);border:2px solid var(--brand);width:100%;margin-top:16px;font-weight:600}.secondary{color:var(--text);border:2px solid var(--border);background:0 0;width:100%;margin-top:16px}.link-button{color:var(--brand);background:0 0;border:none;padding:8px;text-decoration:underline}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.choices{gap:0;display:grid}.preview{background:var(--surface);border-radius:12px;margin:16px 0;padding:8px 16px}.choice-group{border:none;margin:20px 0 0;padding:0}.choice-group legend{margin-bottom:8px;font-weight:600}.choice-row{flex-wrap:wrap;gap:8px;display:flex}.pill{border:2px solid var(--border);cursor:pointer;border-radius:999px;align-items:center;min-height:48px;padding:8px 16px;display:inline-flex}.pill.selected{border-color:var(--brand);background:var(--surface);font-weight:600}.pill input{opacity:0;width:1px;height:1px;position:absolute}.pill:focus-within{outline:3px solid var(--focus);outline-offset:2px}.toggle{align-items:center;gap:12px;min-height:48px;margin-top:20px;display:flex}.toggle input{width:24px;height:24px}.calm *,.calm :before,.calm :after{transition:none!important;animation:none!important}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}h2{margin:24px 0 8px;font-size:1.2rem}.question{margin-bottom:8px;font-size:1.15rem;font-weight:600}.instruction{font-weight:600}.answers{gap:10px;margin-top:8px;display:grid}.answer{text-align:left;background:var(--bg);width:100%;color:var(--text);border:2px solid var(--border)}.answer.selected{border-color:var(--brand);background:var(--surface);font-weight:600}.hear{background:var(--surface);color:var(--text);border:2px solid var(--brand);margin:8px 0}.audio-option{grid-template-columns:1fr 1fr;align-items:stretch;gap:8px;display:grid}.audio-option .hear{margin:0}.big-word{font-size:calc(var(--read-size) * 1.8);text-align:center;margin:16px 0;font-weight:600}.passage,.real-life{background:var(--surface);border-radius:12px;padding:12px 16px}.tiles{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.tile{background:var(--surface);min-width:64px;color:var(--text);border:2px solid var(--border);font-weight:600}.actions{margin-top:8px}.actions button[disabled]{opacity:.5;cursor:not-allowed}.visually-small{color:var(--muted);margin-bottom:8px;font-size:1rem}.field{gap:6px;margin-top:16px;font-weight:600;display:grid}.field select{font:inherit;border:2px solid var(--border);background:var(--bg);min-height:48px;color:var(--text);border-radius:8px;padding:8px}.big-letter{font-size:calc(var(--read-size) * 3);text-align:center;margin:8px 0 16px;font-weight:700}.tricky{color:#1f2933;background:#ffe08a;border-radius:6px;padding:0 6px}.instruction-heading{font-size:1.15rem}.word-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;margin:12px 0;display:grid}.word-card{gap:2px;display:grid}.word-chip{background:var(--surface);color:var(--text);border:2px solid var(--border);font-weight:600}.link-button.small{min-height:44px;font-size:.95rem}.phrase{background:var(--surface);border-radius:12px;padding:12px}.word-inline{font:inherit;letter-spacing:inherit;color:var(--text);background:0 0;border:none;border-radius:6px;min-width:24px;min-height:44px;padding:2px 4px}.word-inline.current{background:var(--brand);color:var(--brand-text)}.praise,.hint{background:var(--surface);border-left:6px solid var(--brand);border-radius:12px;margin:12px 0;padding:10px 14px}.hint{border-left-color:var(--focus)}.lesson-list{gap:10px;padding:0;list-style:none;display:grid}.done-mark{color:var(--brand);font-weight:600}.mic{background:var(--bg);color:var(--brand);border:2px dashed var(--brand);width:100%;margin-top:6px}.listen-box{border:2px solid var(--brand);border-radius:12px;margin:10px 0;padding:10px 14px}.listen-box.listening{background:var(--surface)}.heard-ok{color:var(--brand);font-weight:600}.heard-help{text-decoration:underline;-webkit-text-decoration-color:var(--focus);text-decoration-color:var(--focus);text-decoration-thickness:3px}