:root{--bg:#f6f4ef;--surface:#fff;--surface-2:#eeebe3;--text:#1b1f1d;--muted:#5f6763;--line:#dcd8ce;--accent:#0f7a4a;--accent-text:#fff;--gold:#a87a00;--blue:#1d3f8f;--bad:#b3261e;--bad-bg:#fbe9e7;--fix-bg:#e2f3e9;--almost:#8a5a00;--almost-bg:#fdf3dc;--radius:16px;--tap:48px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#0f1714;--surface:#17221d;--surface-2:#213029;--text:#e9efe9;--muted:#9aa8a0;--line:#2c3c34;--accent:#3fbf7f;--accent-text:#08130d;--gold:#f6c933;--blue:#8fb0ff;--bad:#ff8a80;--bad-bg:#3a1d1b;--fix-bg:#173a28;--almost:#f6c933;--almost-bg:#3a3116}}*{box-sizing:border-box}html{font:-apple-system-body;-webkit-text-size-adjust:100%;background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}body{background:var(--bg);color:var(--text);-webkit-tap-highlight-color:transparent;margin:0;line-height:1.45}button,input,select,textarea{font:inherit;color:inherit}.app{flex-direction:column;min-height:100dvh;display:flex}main{padding:calc(env(safe-area-inset-top) + 8px) calc(env(safe-area-inset-right) + 16px) calc(env(safe-area-inset-bottom) + 88px) calc(env(safe-area-inset-left) + 16px);flex:1;width:100%;max-width:640px;margin:0 auto}.screen-header{min-height:var(--tap);grid-template-columns:1fr auto 1fr;align-items:center;margin-bottom:8px;display:grid}.screen-header h1{text-align:center;text-overflow:ellipsis;white-space:nowrap;max-width:60vw;margin:0;font-size:1.25em;overflow:hidden}.header-right{color:var(--muted);justify-self:end;font-size:.9em}.back{color:var(--accent);min-height:var(--tap);background:0 0;border:0;justify-self:start;padding:0 8px 0 0;font-weight:600}.tabs{background:var(--surface);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right);z-index:5;grid-template-columns:repeat(4,1fr);display:grid;position:fixed;bottom:0;left:0;right:0}.tabs button{min-height:56px;color:var(--muted);background:0 0;border:0;font-size:.9em;font-weight:600}.tabs button.active{color:var(--accent)}h2{margin:0 0 6px;font-size:1.2em}h3{color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin:20px 0 8px;font-size:.8em}p{margin:0 0 10px}.muted{color:var(--muted)}.small{font-size:.85em}.card{text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);width:100%;margin:12px 0;padding:16px;display:block}.card.center{text-align:center}.card.warn{border-color:var(--almost);background:var(--almost-bg)}.card.ok{border-color:var(--accent)}.card.install{border-color:var(--blue)}.next-class{cursor:pointer;flex-direction:column;gap:4px;display:flex}button.primary,button.secondary{min-height:var(--tap);cursor:pointer;border:1px solid #0000;border-radius:12px;padding:10px 18px;font-weight:650}button.primary{background:var(--accent);color:var(--accent-text)}button.secondary{background:var(--surface-2);border-color:var(--line)}button:disabled{opacity:.45}.big-btn{width:100%;min-height:56px;font-size:1.1em}.small-btn{min-height:40px;padding:6px 14px}button.link{color:var(--accent);cursor:pointer;background:0 0;border:0;min-height:40px;padding:8px 4px}button.link.danger{color:var(--bad)}.actions{flex-direction:column;gap:10px;margin:14px 0 6px;display:flex}.actions.row-actions{flex-direction:row}.actions.row-actions>*{flex:1}.icon-btn{min-width:var(--tap);min-height:var(--tap);background:var(--surface-2);color:var(--accent);cursor:pointer;border:0;border-radius:50%;flex-shrink:0;place-items:center;display:inline-grid}.streak{margin:4px 0 8px}.streak strong{color:var(--gold);font-size:1.2em}.list{margin:0;padding:0;list-style:none}.list li+li{margin-top:8px}.row{border-radius:var(--radius);border:1px solid var(--line);background:var(--surface);text-align:left;cursor:pointer;justify-content:space-between;align-items:center;gap:12px;width:100%;min-height:64px;padding:12px 14px;display:flex}.row-main{flex-direction:column;flex:1;min-width:0;display:flex}.row-main.as-link{text-align:left;cursor:pointer;background:0 0;border:0;padding:0}.row-title{overflow-wrap:anywhere;font-weight:650}.row-side{flex-direction:column;align-items:flex-end;gap:4px;display:flex}.mastery{font-variant-numeric:tabular-nums;font-weight:700}.badge{background:var(--surface-2);color:var(--muted);border-radius:999px;width:fit-content;padding:2px 8px;font-size:.75em;font-weight:700;display:inline-block}.badge-upcoming{background:var(--blue);color:#fff}.badge-taught{background:var(--fix-bg);color:var(--accent)}.badge-open{background:var(--almost-bg);color:var(--almost)}.lesson-meta{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.items{border-top:1px solid var(--line);margin:0;padding:0;list-style:none}.items li{border-bottom:1px solid var(--line)}.item-row{align-items:center;gap:10px;min-height:56px;padding:8px 0;display:flex}.item-text{overflow-wrap:anywhere;flex-direction:column;flex:1;min-width:0;display:flex}.dots{gap:3px;display:inline-flex}.dot{background:var(--line);border-radius:50%;width:7px;height:7px}.dot.on{background:var(--accent)}.markdown h4{margin:12px 0 4px}.markdown ul,.markdown ol{margin:0 0 10px;padding-left:1.2em}.markdown code{background:var(--surface-2);border-radius:4px;padding:0 4px}.session{min-height:100dvh;padding:calc(env(safe-area-inset-top) + 8px) calc(env(safe-area-inset-right) + 16px) calc(env(safe-area-inset-bottom) + 24px) calc(env(safe-area-inset-left) + 16px);max-width:640px;margin:0 auto}.session.loading{color:var(--muted);place-items:center;display:grid}.session-top{min-height:var(--tap);align-items:center;gap:12px;display:flex}.progress{background:var(--surface-2);border-radius:999px;flex:1;height:8px;overflow:hidden}.progress>div{background:var(--accent);height:100%;transition:width .3s}.exercise{margin-top:16px}.kind-label{text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:10px;font-size:.8em;font-weight:700}.prompt{overflow-wrap:anywhere;margin:8px 0 12px;font-size:1.35em;font-weight:600}.blank{border-bottom:2px solid var(--accent);text-align:center;min-width:3em;color:var(--accent);display:inline-block}.hint{color:var(--muted);font-weight:500}.en-big{color:var(--muted);font-size:1.1em}.bridge{border-left:3px solid var(--blue);color:var(--blue);padding-left:10px}.note{color:var(--muted);font-style:italic}.tip{font-weight:600}.pt-line{margin:6px 0}.pt-row{align-items:center;gap:10px;display:flex}.pt{overflow-wrap:anywhere;font-weight:650}.pt-line.big .pt{font-size:1.5em}.en{color:var(--muted)}.en-toggle{padding-left:0;font-size:.9em}.answer-form{margin-top:4px}input.answer,.inline-form input,textarea.paste,select{border:1.5px solid var(--line);background:var(--bg);border-radius:12px;width:100%;min-height:52px;padding:12px 14px;font-size:max(1.1em,16px)}input.answer:focus,textarea.paste:focus{border-color:var(--accent);outline:none}textarea.paste{min-height:180px;font-family:ui-monospace,Menlo,monospace;font-size:14px}.inline-form{gap:8px;margin-top:10px;display:flex}.feedback{background:var(--surface-2);border-radius:12px;margin-top:10px;padding:14px}.feedback-right{background:var(--fix-bg)}.feedback-almost{background:var(--almost-bg)}.feedback-wrong{background:var(--bad-bg)}.feedback h2{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.feedback .primary{width:100%;margin-top:10px}.diff>div{grid-template-columns:4.5em 1fr auto;align-items:center;gap:8px;margin:6px 0;display:grid}.diff-label{text-transform:uppercase;color:var(--muted);font-size:.75em;font-weight:700}.diff-bad{color:var(--bad);text-decoration:line-through}.diff-fix{background:var(--fix-bg);color:var(--accent);border-radius:4px;padding:0 3px;font-weight:700}.diff-optional{color:var(--muted)}.tag{background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:2px 8px;font-size:.75em;font-weight:700;display:inline-block}.chips{flex-wrap:wrap;gap:6px;display:flex}.chips .tag{padding:4px 10px;font-size:.85em}.listen-controls{gap:10px;margin:8px 0 12px;display:flex}.listen-controls button{flex:1}.big-stat{margin:8px 0;font-size:2em;font-weight:800}.missed{text-align:left;margin:12px 0}.check{min-height:var(--tap);align-items:center;gap:10px;font-weight:600;display:flex}.check input{width:24px;height:24px;accent-color:var(--accent)}.range{flex-direction:column;gap:6px;margin:12px 0;display:flex}.range input{accent-color:var(--accent)}.report{white-space:pre-wrap;background:var(--surface);border:1px solid var(--line);overflow-wrap:anywhere;border-radius:12px;padding:14px;font-family:ui-monospace,Menlo,monospace;font-size:13px}.error-line{color:var(--bad);margin:0 0 4px;font-family:ui-monospace,Menlo,monospace;font-size:.85em}.warn-text{color:var(--bad)}.viewer{background:var(--bg);z-index:20;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);flex-direction:column;display:flex;position:fixed;inset:0}.viewer-top{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:12px;padding:10px 16px;display:flex}.viewer-body{flex:1;place-items:center;padding:12px;display:grid;overflow:auto}.viewer-body img{max-width:100%;height:auto}.viewer-body audio{width:100%}.voices{border-top:1px solid var(--line);margin:8px 0;padding:0;list-style:none}.voices li{border-bottom:1px solid var(--line);align-items:center;gap:10px;padding:6px 0;display:flex}.voice-row{min-height:var(--tap);flex:1;align-items:center;gap:12px;display:flex}.voice-row input{width:22px;height:22px;accent-color:var(--accent)}.quality-natural{color:var(--accent)}.quality-basic,.quality-novelty{color:var(--muted)}.accent-keys{flex-wrap:wrap;gap:6px;margin-top:8px;display:flex}.accent-keys button{border:1px solid var(--line);background:var(--surface-2);cursor:pointer;border-radius:10px;min-width:40px;min-height:40px;font-size:1.05em}
